scientific program - universitas udayanaerepo.unud.ac.id/6252/1/id3... · invited speakers...

INVITED SPEAKERS

08:30-09:00 Opening Ceremony Paiknam Concert Hall

OpeningAddress Prof.Ja-YoonKoo, ISH2013 Organizing Committee Chairman, Hanyang University Prof.ErnstGockenbach, International Steering Committee Chairman, Germany

CongratulatoryRemarks Dr.Jae-HongKim, Vice Minister for Industry and Technology, Ministry of Trade, Industry and Energy (MOTIE),

Republic of Korea Mr.Hwan-EikCho, President and Chief Executive Officer of Korea Electric Power Corp.(KEPCO) Mr.Duck-HoLim, President of Hanyang University

09:00-09:20 Break

09:20-10:10 KeynoteLecture1 Paiknam Concert Hall

UserPerspectiveontheApplicationofNewDevelopmentsinHighVoltageTechnologies Mr.MarkWaldron (National Grid, UK Chairman, CIGRE Technical Committee)


InsulationSystemunderHVDCStress Prof.JosefKindersberger (Technical University of Munich, Germany)


SimulationTechnologiesforHighPowerApparatus Dr.Kyong-yopPark (Korea Electrotechnology Research Institute (KERI), Republic of Korea)

SCIENTIFIC PROGRAM

SESSION OA1: Electro-magnetic Field 1

Monday 26 August 2013, 13:30-15:00 HIT 612

[OA1-01] Research on the Electric Field Controlling for the Arc-chute of High Voltage SF6 Circuit Breaker C. Y. Peng* (Shanghai Tongji University, China), L. J. Jin, B. N. Zhao, W. H. Zhang

[OA1-02] Optimal Electric Field Performance of EHV Transmission Lines Using Ground Shield Conductors M. A. Abouelatta* (Benha University- Shoubra Faculty of Engineering, Egypt)

[OA1-03] Numerical Modeling and Design Evaluation of High Voltage Laboratory A. Pradeep* (BHEL R&D, India)

[OA1-04] Electrostatic Field Simulation Considerations for a 1000 kV Reference Voltage Divider J Hällström* (MIKES, Finland), J. V. Klüss

[OA1-06] Conducting Particle in Vacuum Interrupter: Field Computation and Dynamic Shuo Xu* (The University of Tokyo, Japan), Kunihiko Hidaka, Akiko Kumada, Hisatoshi Ikeda

SESSION OA2: Electro-magnetic Field 2


[OA2-01] Measurement of Magnetic Properties of Electrical Steels at High Flux Densities Using an Improved Single Sheet Tester

Z.D. Wang* (The University of Manchester, UK), Q. Tang, P. Anderson, A. Moses, P. Jarman

[OA2-02] An Electro-optic Integrated Sensor for Intensive E-field Measurement with Improved Temperature Stability Ben Niu* (Tsinghua University, China), Rong Zeng, Chanxiao Li, Bo Wang, Junjie Yu

[OA2-03] Resonance Effect on Noise due to Magnetostriction on Magnetic Circuit S. Chen* (ALSTOM GRID, France), B. Daoudi, S. Louise, G. Luna, F. Devaux

[OA2-04] Prediction of Temperature Distribution on UHV 3-phase Encapsulated Bus by 2D Magneto-thermal Analysis H.S. Sohn* (Power & Industrial Systems R&D Center, Hyosung Corporation, Republic of Korea), N.K. Kim, J.J. Chae, C.H.

Yeo, J.H. Kim

[OA2-05] Measurement of ELF Electric and Magnetic Field Strengths of 400 kV Transmission Lines and 400 kV Sub-stations

K A Aravind* (Central Power Research Institute, India), B. Krishna, D. Devendranath, S.K. Agarwal, B.N. De Bhowmick, S.B.R. Rao, B.N.V.R.C. Suresh Kumar

[OA2-06] Influence by Parasitic Capacitances on Frequency Response of a 380-150-50 kV Transformer with Shunt Reactor

L. Wu* (Eindhoven University of Technology, Netherlands), H. Fonk, P.A.A.F. Wouters, E.F. Steennis

SESSION PA: Electromagnetic Fields: Computation, Measurements, Environmental Effects

Tuesday 27 August 2013, 08:30-12:00 HIT Lobby (6F)

[PA-01] Calculation of Power Frequency Fields from High Voltage Overhead Lines in Residential Areas I. N. Ztoupis* (High Voltage Lab, Greece), I. F. Gonos, I. A. Stathopulos

[PA-02] Test and Simulation Study on Hysteresis Loop for Transformer Core under DC Bias Xiaoping Li* (Wuhan University, China), Hailiang Lu, S.A.K.S Jafri, Xishan Wen

[PA-04] Live Work under HVDC Voltage: An Investigation into Altitude Effects of Flashover Voltage for Rod-plane Air Gaps

N. Parus* (University of the Witwatersrand, South Africa), I.R. Jandrell, N. Mahatho, T. Govender, H. A. Roets

TOPIC AElectromagnetic Fields: Computation, Measurements, Environmental Effects

[PA-05] Applying Differential Evolution Algorithm Combined with Finite Element Method to Optimize Grading Rings for 750kV Surge Arrester

Zhipeng Jiang* (School of Electrical Engineering,Wuhan University, China), Xishan Wen, Lei Lan, Huazhu Du

[PA-06] Design and Construction of a 1 kV Portable Impulse Voltage Generator S.Nedphokaew* (Rajamangala University of Technology Phra Nakhon (RMUTP), Thailand), V. Phupha, T. Tanmaneeprasert

[PA-07] Simulation Analysis of Error of Transmission Tower Grounding Resistance Measurement Using Clamp Meter Wei Li* (Wuhan University, China), Chang-sheng Zhu, Zhi-qiang He, Xi-shan Wen, Lei Lan, Hai-liang Lu

[PA-08] Analysis of Arc Process in Low Voltage Circuit Breaker T. H. Song* (Hyundai Heavy Industries Co., Ltd, Republic of Korea), J. S. Kang, B. S. Baek, J. S. Hur, D. J. Kim, K. C. Ko

[PA-09] Magnetic Hysteresis Model Based on Sum of Harmonics in the Magnetic Field C. Freitag* (Karlsruhe Institute of Technology, Germany), T. Bender, T. Leibfried

[PA-10] Characteristics of Electric Fields Induced inside a Worker Exposed to Multiple Frequency Magnetic Fields of Neutral Ground Reactor

Suk Won Min* (Soonchunhyang University, Republic of Korea)

[PA-11] A Comparison of Measures to Reduce the Intensity of Magnetic Field outside High Voltage Power Substations L. Korpinen* (Tampere University of Technology, Finland), O. Okun, S. Shevchenko

[PA-12] Examples of Spark Discharge under a 400 kV Power Line L. Korpinen* (Tampere University of Technology, Finland), R. Pääkkönen, H. Tarao, H. Kuisti

[PA-13] Occupational Exposure to Electric and Magnetic Fields whilst Working around Power Transformers at 110 kV Substations in Tampere, Finland

L. Korpinen* (Tampere University of Technology, Finland), R. Pääkkönen, F.Gobba

[PA-14] Transient Field Distribution on Epoxy Resin Insulators in Air under DC Voltages A. Winter* (Technische Universität München, Germany), J. Kindersberger

[PA-15] Simulation Research on Interturn Short Circuit in Rotor Winding Based on FRA Hao Liu* (Xi'an Jiaotong University, China), Xiaobo Ou, Shengchang Ji

[PA-16] Internal Field Optimization of a Vacuum Interrupter Chamber in Order to Reduce Insulation Stress Using NN, GA and FE Approach

A. Akbari* (K. N. Toosi K. N. Toosi University of Technology, Iran), A. Shemshadi, S.M.T Bathaee

[PA-17] Study on Electromagnetic Environmental Effects of HVDC Overhead Transmission Line Kyeho Jon* (LS Cable and System Ltd., Republic of Korea), Daejeong Kim, Mikyoung Ahn, Jungnyun Kim, Bo Zhang

[PA-18] Measurement of the Electric Field Distribution on the Ground Surface in a Rod-plane Configuration: Voltage Effect

D. Khelil* (University of Science and Technology Houari Boumediene, Algeria), S. Bouazabia, N. Harid, A. Haddad

[PA-19] Effect of Electric and Magnetic Fields of Transmission Lines on Metallic Gas Pipe Lines Osama E. Gouda* (Cairo University, Egypt), Adel Z. El Dein

[PA-20] Optimization of Corona Control Rings for EHV/UHV Suspension Porcelain Insulator Strings Pradeep M. Nirgude* (Central Power Research Institute, India), V. Sravanthi, D. Devendranath

[PA-21] Parameters Estimation of Horizontal Multi-layer Soils by Particle Swarm Optimization Lu Zhang* (Wuhan University, China), Zhuohong Pan, Xishan Wen

[PA-22] Arc Cross-section Determination of Convection Stabilized Arcs M. Kang* (ETH Zurich, Switzerland), M. M. Walter, C. M. Franck

[PA-23] Validation of Finite Element Analysis Predictions through Transformer Core No-load Testing David Marnay* (ALSTOM GRID, France), Triomphant Ngnegueu, Filippos Marketos, Sebastien Louise

[PA-24] Water Droplet Oscillation on the Hydrophobic Surface of Polymeric Insulators under AC Electric Field Stress M.H. Nazemi* (Technische Universität Darmstadt, Germany), H. Songoro, E. Gjonaj, V. Hinrichsen, T. Weiland

[PA-25] Effects of Different Screw Threads of Screw Electrode Ozonizer on Ozone Generation Properties T. Fujishima* (Nagasaki University, Japan), T. Kawaguchi, T. Amano, T. Yamashita

[PA-26] Methodology for the Numeric Simulation of a Hybrid AC/DC Field Stress on Overhead Line Insulators J. Knauel* (RWTH Aachen University, Germany), A. Wagner

[PA-27] Numerical Estimations of Induced and Contact Currents in Human Body in Contact with a Car in 60 Hz Electric Fields

Hiroo Tarao* (Kagawa National College of Technology, Japan), Noriyuki Hayashi, Leena Korpinen, Takashi Matsumoto, Katsuo Isaka

[PA-28] A New Approach to Evaluate the Soil Temperature of High Voltage Cables J. Plesch* (Graz University of Technology, Austria), S. Pack

[PA-29] Investigating Effective Design Parameters of Lead Exit in Power Transformers for Electric Field Optimization Using Finite Element Method

Asghar Akbari* (K. N. Toosi K. N. Toosi University of Technology, Iran), Masoud Rouhollahi

[PA-30] The Prediction of AC Breakdown Voltage Using Fuzzy Inference System A. Font * (Istanbul Technical University (I.T.U), Turkey), K. Arikan, O. Kalenderli, A. Kara, E. Onal

[PA-31] Evaluation on Application of DC Bias Restraining Equipment Zhuohong Pan* (Wuhan University, China), Lu Zhang, Xishan Wen

[PA-32] Study of Protrusion Detachment on Vacuum Interrupter Contact Surface Shuo Xu* (The University of Tokyo, Japan), Kunihiko Hidaka, Eiji Kaneko, Akiko Kumada, Hisatoshi Ikeda

[PA-33] Analysis of LNA(Low Noise Amplifier) Susceptibility Affected by HPM Threat Jeong-Ju Bang* (Inha University, Republic of Korea), Sun-Ho Choi, Chang-Su Huh, U-choel Park

[PA-34] Magnetic Field Distribution under EHV and HV Double-circuit Power Lines which Cross Paths T. Matsumoto* (Anan National College of Technology, Japan), H. Hirata, H. Tarao, N. Hayashi, K. Isaka

[PA-35] Simulation on Positive Streamers in Insulating Oil under Nanosecond Pulse Voltage Initiated from a Needle-plate Electrode

Guan Jun Zhang * (Xi'an Jiaotong University, China), Yuan Li , Hai Bao Mu, Jun Bo Deng, Shu Hong Wang

[PA-36] Simple Marx Generator for UWB HPEM EMC Testing Sughun Chang* (Korea Electrotechnology Research Institute (KERI), Republic of Korea), Jaebok Lee, Sergey Shenderey, E.L

Svechnikov

[PA-37] Predict of Temperature-Rise of LV Housing in the Gas Insulated Switchgear Using Electro Magnetic-Thermal coupled Analysis

H. Y. Kang* (LS Industrial Systems Co., Ltd., Republic of Korea), S. H. Lee, H. S. Shim, J. U. Choi, S. W. Park

SESSION OB1: Transient Voltages 1


[OB1-01] Research on Laser-triggering Methods for a High Voltage Spark Hap in High-voltage Series Capacitor Protection

Weimin Sun* (Tsinghua University, China), Rong Zeng, Xinfu Sheng, Chijie Zhuang

[OB1-02] Design of Corona Rings for 380 kV Nonceramic V-insulator String S. Ilhan* (Istanbul Technical University (I.T.U), Turkey), A. Ozdemir, H. Ismailoglu

[OB1-03] Lightning Overvoltage of Overhead Power Collection Transmission Line in Wind Power Plant Xianqiang Li* (Wuhan University, China), Jian Xue, Jianguo Wang, Mi Zhou, Li Cai, Yu Wang

[OB1-04] Large-scale Tests of Practical Grounding Electrodes D. Clark* (Cardiff University, UK), D. Guo, D. Lathi, H. Griffiths, N. Harid, A. Haddad, A. Ainsley

[OB1-05] Numerical Simulation Method for the Lightning Response of a Grounding System Buried in Multilayered Earth Based on the Quasi-Static Complex Image Method

Zhong-Xin Li* (China Electrical Power Research Institute, China)

[OB1-06] Phase Space Reconstruction and Nonlinear Characteristics Quantities Extraction of Ferroresonance Overvoltage Time Series

Qing Yang* (Chongqing University, China), Wenxia Sima, Ming Yang, Tao Yuan, Lijun Chen, Sha Ouyang



[OB2-01] Altitude Corrections for Switching Impulse Flashover Voltage of Rod-Plane Air Gaps Ding Yujian* (High Voltage Research Institute, China), Liao Weiming, Fan Jianbin, Li Qingfeng, Zhou Jun, Shu Zhiyi

[OB2-02] Analysis of Stress and Strength Coordination of Power Circuit Breakers in Thailand’s Transmission Network Thanapong Suwanasri* (King Mongkut's University of Technology North Bangkok, Thailand), Sumate Lipirodjanapong,

Cattareeya Suwanasri

[OB2-03] The Observation and 3D Modelling of Long Positive Streamers in Air She Chen* (Tsinghua University, China), Rong Zeng, Chijie Zhuang, Xuan Zhou

[OB2-04] Protection of Distribution Transformer against Arising or Transferred Fast-front Overvoltages: Effects of Surge Arrester Connection Conductors Length

Z.D. Datsios* (Aristotle University of Thessaloniki, Greece), P.N. Mikropoulos, Z. Politis, A.G. Kagiannas, T.E. Tsovilis

[OB2-05] Comparison of Simulating Experiment on Switching Surges in Cable Collection Grid of Wind Power Plant with Transient Analysis

X.Z. Liu* (Xi'an Jiaotong University, China), X.Z. Wang, Y.S. Li, A. Saboor, T.L. Zhang, Y.C. Shang, J. S. Cao

[OB2-06] Evaluation of Lightning Incidence to ESE Rods T.E. Tsovilis* (Aristotle University of Thessaloniki, Greece), P.N. Mikropoulos


Tuesday 27 August 2013, 08:30-10:00 HIT 606

[OB3-01] Varistor Coupling for Combination Wave Test Waveforms of Surge Protective Devices Mi Zhou* (School of Electrical Engineering, Wuhan University, China), Fang Liu, Qiyou Duan, Jianguo Wang

TOPIC BTransient Voltages: Lightning, Switching, Repetitive Impulses, Surge Arrester, Insulation Coordination, Overvoltage Protection

[OB3-02] Application and Potential of Integrated Surge Arresters in Gas Insulated Transmission Lines (GIL) for Lightning Overvoltages

F. Goll* (Technische Universität München, Germany), R. Witzmann, C. Neumann, D. Imamovic

[OB3-03] Application Philosophy and History of High Field MO-resistors to Surge Arresters S. Ishibe* (Kyushu Institute of Technology, Japan)

[OB3-04] Development of a Mathematical Model to ZnO Surge Arrester P.B. Vilar* (Federal University of Campina Grande, Brazil), E.G. Costa, G.R.S. Lira, M.J.A. Maia

[OB3-05] Behavior of Metal Oxide Surge Arrester for Fast Surges E.G. Costa* (Federal University of Campina Grande, Brazil), V.B. Alba, S.L.G.R. Lira, B.J.A. Martinez

[OB3-06] Evaluation of the Moisture Ingress and the Electrical Performance on Polymeric Surge Arresters of Distribution Networks

D.A. da Silva* (UNICAMP, Brazil), E.C.M. Costa, J. Pissolato, R.C. de Jesus, J.L. de Franco, S.R. de Abreu, M.A.A. Romano, K. Lahti

SESSION PB: Transient Voltages: Lightning, Switching, Repetitive Impulses, Surge Arrester, Insulation Coordination, Overvoltage Protection


[PB-01] Transformer Limited Fault Transient Recovery Voltage for EHV and UHV Circuit Breakers D. Dufournet* (ALSTOM GRID, France), A.Janssen, J.Hu

[PB-02] Line Surge Arrester Protection Design for an 380 kV Power Transmission Line A. Ozdemir* (Istanbul Technical University (I.T.U), Turkey), C. Ozturk, S. Ilhan

[PB-03] Simulation of Current Distribution of Transmission Line Tower at Lightning Stroke Hailiang Lu* (Wuhan University, China), Changcheng Zhu, Wei Li, Xishan Wen, Zhiqiang He

[PB-04] Numerical Modelling of the Inception of Large Scale Discharges A. Villa* (Ricerca Sistema Energetico (RSE), Italy), L. Barbieri, R. Malgesini

[PB-05] Comparison of Overvoltage Propagation in Transformers M. Florkowski* (ABB Corporate Research, Poland), J. Furgał, P. Kłys, M. Kuniewski

[PB-06] Design and Construction of a 1 kV Portable Ring Wave Generator T. Tunmaneeprasert* (Faculty of Engineering,Rajamangala University of Technology Phra Nakhon (RMUTP), Thailand),

P.Wannakarn, S.Nedphokaew

[PB-07] Comparison of Lightning Shielding Failure Simulation Methods for UHV Transmission Lines Qian Li* (Tsinghua University, China), Rong Zeng, Chijie Zhuang, Zhanqing Yu, Zhizhao Li, Jinliang He

[PB-08] The Evaluation of Interruption Performance of Gas Circuit Breakers by Using the Modified-mayr Arc Model Y S Cho* (Korea Electrotechnology Research Institute (KERI), Republic of Korea), H K Kim, J K Chong, Y H Oh, W Y Lee, K D Song

[PB-09] Experimental Study on Vacuum Circuit Breaker with Back-to-back Switching Capability Byoung-Chul Kim* (LS Industrial System Electro-technology R&D Center, Republic of Korea), Sung-Tae Kim, Kil-Young Ahn,

Jong-Ho Lee

[PB-10] New Approach to Lightning Surge Analysis on Overhead Lines R. Haller* (University of West Bohemia Pilsen, Czech Republic), Z. Benesova, V. Kotlan

[PB-11] CFD Analysis of Interruption Performance of High-voltage Gas Circuit Breakers Kim H.K.* (Korea Electrotechnology Research Institute(KERI), Republic of Korea), Cho Y.S., Song K.D.

[PB-12] Investigation on Circuit Modelling of Ferrite Rings for VFT Suppressing Based on Multi-coil Coupling J. X. He* (Tsinghua University, China), W. D. LIU

[PB-13] Observation of Flashover Path on Porcelain Cap and Pin Type Insulator under Different Lightning Impulse Voltage Polarities

H. G. P. Hunt* (University of the Witwatersrand, South Africa), N. J. West, K. J. Nixon, I. R. Jandrell

[PB-14] Analysis of the Step-up Transformer Energization Inrush Currents at the Krsko Nuclear Power Plant M. Becan* (Elektroinstitut Milan Vidmar, Slovenia), R. Leskovec, B. Zitnik, R. Seme, A. Pozne

[PB-15] Detailed Analysis of the North-western Slovenian Blackout S. Podkoritnik* (Elektroinstitut Milan Vidmar, Slovenia), M. Iglic, M. Maksić, D. Matvoz, J. Kostevc, G. Stern

[PB-16] Experimental Application of the Similarity Theory on Scaled Strip Electrode Configurations for the Calculation of the Grounding Impedance

E. P. Nicolopoulou* (National Technical University of Athens, Greece), V.T. Kontargyri, I. F. Gonos, G. J. Tsekouras, E. C. Pyrgioti, I. A. Stathopulos

[PB-17] Type Test and Pre-qualification Test of EHV Cable System for 400 kV / 2500 mm2 Sunghoon Cho* (ILJIN Electric, Republic of Korea), Youngbum Kim, Myunghun Jun, Yongwook Lee, Jinwoo Kim

[PB-18] Overvoltage Analysis of Single-phase Short-circuit in Buji 220kV Substation Chen Gong* (Wuhan University, China), Zeng Weiwen

[PB-19] Overvoltage of Shunt Reactor Caused by Pre-breakdown Phenomenon of SF6 Breaker Yunzhu An* (Wuhan University, China), Xishan Wen, Huazhu Du, Hongtao Fan, Yu Wang, Hongbo Ma

[PB-21] Research on Impulse Characteristics of Isolated Grounding System in Large Grounding Grid Zongxi Liu* (Wuhan University, China), Xishan Wen, Lei Lan, Zhuohong Pan

[PB-22] Degradation of Oil Impregnated Paper Film Insulation under Influence of Repetitive Fast High Voltage Impulses

K. Niayesh* (University of Tehran, Iran), M. Mohammadi, M. Farahani, E. Gockenbach

[PB-23] Remote System for Measurement and Analysis of Transient Voltages - Smarte H.J.A.Martins* (CEPEL - Electric Energy Research Center, Brazil), C.M.Vasques, C.F.Carraro, I.F.Nova, W.C.Filho, M.

Michalski

[PB-24] Interaction between Electric Power System and Autotransformers by Analyzing Transient Voltages Measured Using Bushing Capacitive Taps

H.J.A.Martins* (CEPEL - Electric Energy Research Center, Brazil), C.M.Vasques, C.F.Carraro, I.F.Nova, L.E.Santos, W.C.Filho, M. Michalski

[PB-25] The Choice of the Lowest Distance between Shielding Wire and Phase Conductor of Overhead Transmission Line

A. S. Gayvoronsky* (Research and Development Center at Federal Grid Company of Unified Energy System, Russian Federation), O. V. Bogdanov

[PB-26] Application of Improved Single Surge Impedance Tower Model for the Research on the Transmission Lines with Quadruple-circuit on Single Tower

Mingjie Xiao* (Wuhan University, China), Wenwu Huang, Xishan Wen, Hailiang Lu

[PB-27] Design and Installer Solar Energy Systems Sun Tracking for Comparison S.Nedphokaew* (Rajamangala University of Technology Phra Nakhon (RMUTP), Thailand)

[PB-28] The First Application of Line Arrester to Upgrade Lightning Performance of UHV Transmission Line in Korea Joosik Kwak* (KEPCO, Republic of Korea), Jung-Wook Woo, Sang-soo Kim, Jung-Won Lee

[PB-29] Steep Front Pulse Generation Using Coaxial Marx Circuit for EMP Test Yong-Moo Chang* (EFT Center, Hanyang University, Republic of Korea)

SESSION OC1: Testing Techniques 1

Thursday 29 August 2013, 10:30-12:00 HIT 608

[OC1-01] Assessment of the Pollution Performance of Composite Insulators G. Pirovano*(RSE, Italy), P. Omodeo Gianolo, A. Pigini

[OC1-02] Measurements and Simulation of Magnetic Cores on the Basis of Low Frequency Data M. Freiburg* (TU Dortmund, Germany), R. Schmerling, F. Jenau

[OC1-03] Impulse Testing of Hybrid Gas-solid Polymer Insulation Systems Y. V. Serdyuk* (Chalmers University of Technology, Sweden), S. Kumara, Y. Zheng, S. M. Gubanski, R. Summer, M. Ramesh,

R. Haller, P. Martinek

[OC1-04] Coupled Simulation of Flow and Dynamic Analysis for Prediction of the Performance and Stroke in GIS Youngsu Lee * (LS Industrial System, Republic of Korea), Boohyung Bang, Heesub Ahn, Jongung Choi, Seokwon Park

[OC1-05] New Artificial Pollution Tests for Silicone Rubber Insulators M. Albano* (Cardiff University, UK), P. Charalampidis, H. Griffiths, M. A. Haddad, R. T. Waters

[OC1-06] Research and Development of High-voltage Solid-state Switch for 35kV OWTS Jun Jiang* (North China Electric Power University, China), Sheng-chuan Zhao, Guo-ming Ma, Xiang Shi, Ding-ping Luo,

Cheng-rong Li, Wen-zhi Chang, Yi-long Chen, Xiao Cui, Zhi-ge Li, Jian Qu, Zhi-guo Tang

SESSION OC2: Testing Techniques 2


[OC2-01] Some Remarks Concerning Testing of Ultra High Voltage Equipment Ernst Gockenbach* (Leibniz Universität Hannover, Germany)

[OC2-02] Insulation Characteristics with Respect to the Front Time Extension in Lightning Impulse Voltage Test for UHV Equipment

T. Ishikura* (Mitsubishi Electric Corporation, Japan), E. Hino, T. Tsuboi, G. Ueta, S. Okabe

[OC2-03] Analysis and Comparison of Atmospheric and Altitude Correction Methods for Air Gaps and Clean Insulators Johannes Rickmann* (Phenix Technologies, USA), Jianbin Fan, Qingfeng Li, Yongli Liao, Alberto Pigini, Hamid Sharifnia,

Dragan Tabakovic, Dong Wu, Ding Yujian

[OC2-04] Study on Overvoltage Measurement by Two Leakage Current Sensors for Capacitive Equipment Lin Du* (Chongqing University, China), Shuncheng Liu, Youyuan Wang

[OC2-05] Uncertainty of Time-parameter Measurement of High Voltage Full Lightning Impulse by National-standard Class Measuring System

Satoru Miyazaki* (Central Research Institute of Electric Power Industry, Japan), Hisashi Goshima, Takaaki Amano, Hiroyuki Shinkai, Masafumi Yashima, Takayuki Wakimoto, Masaru Ishii

[OC2-06] Designing Precise Current Comparators and Their Application to Electrical Metrology H. Cayci* (TUBITAK UME, Turkey)

SESSION PC: High Voltage and High Current Testing Techniques


[PC-01] Coherence Function and FFT Analysis of Theoretically Simulated Partial Discharge Current in a Transformer during Impulse Test

M. Suryakalavathi* (JNTUH, India), K.Shashidhar Reddy, B.N.Shashank, Vishal Vijay Kulkarni, B.P.Singh

TOPIC CHigh Voltage and High Current Testing Techniques

[PC-02] Humidity Corrections and Front Time Tolerance for Lightning Impulse Voltages in Metric Air Gap R. R. Diaz* (National University of Tucuman, Argentina), A. A. Segovia

[PC-03] Test Setup for the Qualification-testing of Surge Arresters Used in AC and DC Power Systems A. Claudi* (University of Kassel, Germany), G. Finis, F. Schäfer, R. Durth, A. Austermuehl

[PC-04] Consideration in GB Standards for UHVAC and UHVDC Equipment Testing Dong Cui* (Xi’an High Voltage Apparatus Research Institute, China), Jiansheng Wang, Enwen Tian

[PC-05] Calculation and Analysis of Overvoltage on the Neutral Point of 110kV Power Transformers Li Bo-jiang* (Wuhan University, China), Wen Xi-shan , Lan Lei , Li Xiao-ping , Lu Hai-liang

[PC-06] Test Setup and Results Concerning the Mechanical Strength of Continuously Transposed Conductors for Power Transformers

D. Geißler* (Karlsruhe Institute of Technology (KIT), Germany), T. Leibfried

[PC-07] Development and Application of a Climate Chamber for Testing Large Dimensioned High Voltage Components up to 100 kV

R. Schmerling* (TU Dortmund, Germany), M. Freiburg, F. Jenau, T. Weissgerber, F. Pohlmann

[PC-08] A Simulative Study on Thermal Effect of Static Electrical Arc on Surface Heat Dissipation for Different Electrode Configurations Using ANN

A. Font* (İstanbul Tehcnical University, Turkey), O. Kalenderli

[PC-09] A Study about Making Current Tests with Ignition Fuse Wire for Earthing Switch on UHV Class Jaechan Lim* (Korea Electro-technology Research Institute, Republic of Korea), Ikesun Choi, Junghyeon Ryu, Seungjae Park,

Kernjoong Kim

[PC-10] Step Response and Comparison Test of Impulse Current Measuring System Takayuki Wakimoto* (Chiba Institute of Technology, Japan), Masaru Ishii

[PC-11] Study on Application of Fault Current Limiter for OCR Coordination in Underground Grid H.Y. Park* (LS Industrial Systems Co., Ltd., Republic of Korea), K.W. Park, M.J. Kim, J.W. Sim, W.J. Choe, S. W. Lee, G.Y.

Jeon, S.B. Kim

[PC-12] Denoising White Noise in Partial Discharge Based on the Wavelet Entropy of Lifting Wavelet Decomposition J.Z. Wu* (South China University of Technology, China), H.Q.Niu

[PC-13] Characterization of Ultra-high-voltage Power Semiconductor Devices I.H. Kang* (Korea Electrotechnology Research Institute (KERI), Republic of Korea), S. B. Yun, S. C. Kim, N. K. Kim

[PC-14] Test Study on Flashover Characteristics of Long Air Gap with Negative Polarity Switching Impulse Yu Wang* (Wuhan University, China), Xishan Wen, Mingyue Yu, Lei Lan, Yunzhu An, Hailiang Lu

[PC-15] Characteristics of Creepage Discharge under Impulse Voltage Application in Oil/Pressboard Composite Insulation System

Shigeyoshi Yoshida* (Kyushu Institute of Technology, Japan), Norio Morita, Masahiro Kozako, Masayuki Hikita, Takahiro Umemoto, Soichiro Kainaga, Hirotaka Muto, Takao Tsurimoto

[PC-16] A Study on the Subsequent Impulse Current Generator with the Waveshape of 0.25/100 μs Tae-Hyung Lee* (KESRI, Republic of Korea), Sung-Chul Cho, Dong-Kyu Kim, Ju-Hong Eom

[PC-17] Calibration Techniques of AC High Voltage and Heavy Current by Employing National Measurement Standards J. K. Jung* (Korea Research Institute of Standards and Science, Republic of Korea), S. H. Lee, J. H. Kang, Y. S. Lee

SESSION OD1: PD in Solid Insulation


[OD1-01] Relationship between Electric Field Strength and Characteristic Frequency in Partial Discharge Tatsuya Mutakamihigashi* (Kanden Engineering Corporation, Japan), Reisho Sakurai, Sho Okada, Hideki Ueno

[OD1-02] Investigation on Electric Field Stress and Partial Discharge Measurement of Power Cable Termination Defects

P. Fuangpian* (King Mongkut’s University of Technology North Bangkok, Thailand), T. Suwanasri, C. Suwanasri, A. Rajakrom, S. Rattananupong, S. Ruankon, T. Thanasettagone

[OD1-03] Fibre-optic Acoustic Detection of Damage Processes in Elastomeric Insulation under AC and DC Stress P. Rohwetter* (BAM Federal Institute for Materials Research and Testing, Germany), W.R. Habel, G. Heidmann, D. Pepper

[OD1-04] PD Measurement and Diagnosis of GIS in High Voltage Cable Grids Rene Hummel* (OMICRON electronics, Austria), Kay Rethmeier, Stefan Hoek, Alexander Kraetge, Ole Kessler, Inho Hong

[OD1-05] Simulation of Partial Discharge in Cavities Embedded in Solid Dielectrics by Finite Element Method V. Sarfi* (Moghan Wire and Cable, Iran), V. Hemmati

[OD1-06] Return of Experience from Continuous PD Monitoring of Rotating Machines L.V. Badicu* (Omicron Energy Solutions, Germany), W. Koltunowicz, M. Koch, A. Piccolo

SESSION OD2: Space Charges


[OD2-01] Space Charge and Its Impact on DC Breakdown of Polymeric Materials G. Chen* (University of Southampton, UK)

[OD2-02] The Research on Space Charge Property in the Sample with Two Layers of Oil-immersed-paper and Oil Kai Wu* (State Key Laboratory of Electrical Insulation and Power Equipment, China), Hao-sen Wang, Qing-dong Zhu, Yong-

hong Cheng, Sheng-tao Li

[OD2-03] Charge Accumulation Phenomena of GIS Downsized Spacer under DC Field: High-resolution Measurement and Analysis with Circuit Model

H. Iwabuchi* (The University of Tokyo, Japan), S. Matsuoka, A. Kumada, K. Hidaka, Y. Hoshina, T. Yasuoka, M. Takei

[OD2-04] Charging and Deformation of Water Droplets on Composite Insulating Surface Stressed by DC Electric High Voltage

J. Ndoumbe* (Ecole Centrale de Lyon, University of Lyon, France), A. Beroual, A. Moukengue Imano

[OD2-05] Space Charge Characteristics of Epoxy/SiO2 Nanocomposites with Plasma-functionalized Nanoparticles B.T. Phung* (University of New South Wales, Australia), Chao Wu, Wei Yan

[OD2-06] Influence of Space Charge on the Breakdown Characteristics of Oil-paper Insulation Yuanwei Zhu* (Xi’an Jiaotong University, China), Shengtao Li, Daomin Min, Liang He, Wencheng Wu, Yang Yang

SESSION OD3: Gas Insulation and PD


[OD3-01] Optical Detection and Measurement of Partial Discharges at a Metal/SF6/Epoxy Triple Junction O. Lesaint (CNRS and grenoble University, France), L. Caliap, N. Bonifaci, A. Girodet

TOPIC DHigh Voltage Measuring Techniques: Dielectric Parameter, Space Charges, Partial Discharges

[OD3-02] Methods to Reduce the Electron Emission at the Triple Junctions in High Voltage Vacuum Interrupters K.R. Venna* (Brandenburg Technological University-Cottbus, Germany), H. H. Schramm, S. Giere

[OD3-03] Sensitivity of a Loop-shaped UHF Sensor in a Three-phase 550 kV GIS for Detecting Partial Discharges T. Hoshino* (Toshiba Corporation, Japan), H. Shirai, H. Kurosaki, M. Ito, M. Takei, T. Saida

[OD3-04] Study on SF6 Decomposition Byproducts under Typical Insulation Defects in CT J.Y. Li* (Xi'an Jiaotong University, China), Y.Y. Wang, S.C. Ji

[OD3-05] Relationship between PD Current Pulse Waveforms and the Emitted Electromagnetic Waves in SF6 Alternative Gases with the SHF_PDPW System

Takuya Matsumoto* (Kyushu Institute of Technology, Japan), Minoru Fukuzaki, Shinya Ohtsuka

[OD3-06] Electric Field Lift-off and Motion of Particles in Gaseous Insulation P. Simka (ABB Switzerland Ltd., Switzerland), M. Seeger

SESSION OD4: Insulation in Motor and Others


[OD4-01] Partial Discharge Measurements under Repetitive Impulse Voltage for “End of Line Tests” of Electric Traction Motors

A. Berbic* (University of Kassel, Germany), A. Claudi

[OD4-02] Effect of Dielectric Material on Decay of Surface Charge Deposited by Corona Discharge X. Wang* (School of Electrical Engineering, Royal Institute of Technology, Sweden), R. Clemence Kiiza, M. Ghaffarian

Niasar, R. Nikjoo, N. Taylor, H. Edin

[OD4-03] Application of Isothermal Relaxation Current Method in the Generator Stator Bar Insulation Evaluation during Electric Aging Process

Yu Cao* (Shanghai Jiao Tong University, China), Qian Zhang, Jiandong Wu, Yi Yin

[OD4-04] Partial Discharges in a Stator under Synthezised Voltage Waveforms T.J. Hammarstroem* (Chalmers University of Technology, Sweden), T. Bengtsson, J. Blennow, S. M. Gubanski

[OD4-05] Dielectric Condition Assessment of IGBT Based Power Converter Module: An Experimental Approach Saravanakumar Arumugam* (University Rostock, Germany), Sergey Gorchakov, Thomas Schoenemann

[OD4-06] An Optimized Solution for Electrical Partial Discharge Measurement on Large Power Capacitors Raja Kuppuswamy* (Haefely Test AG, Switzerland)

SESSION OD5: Liquid Insulation and PD

Wednesday 28 August 2013, 08:30-10:00 HIT 608

[OD5-01] Partial Discharge Localization in Power Transformers Su Su Win* (Yangon Technological University, Myanmar), Sebastian Coenen, Stefan Tenbohlen

[OD5-02] Study on Partial Discharge and Generated Gasses of Natural Ester Oils Having Different Molecular Structures Motoo Tsuchie* (Kyushu Institute of Technology, Japan), Masayuki Hikita, Takashi Suzuki, Akinori Kanetani, Takaaki Kano

[OD5-03] Effect of Mineral Oil Conditions on Partial Discharge Inception Voltage Characteristics N. Pattanadech* (Institute of High Voltage Engineering and System Management, Austria), F. Pratomosiwi, A. A. Kemma,

T.F. Sipahutar, B. Wieser, Suwarno, M. Muhr

[OD5-04] Investigations of In-oil Methods for PD Detection and Vibration Measurement M. Beltle* (University of Stuttgart, Germany), M. Siegel, S. Tenbohlen

[OD5-05] Combining Acoustical and Different Electrical Methods for Localizing Partial Discharge in a Power Transformer Stefan M. Hoek* (OMICRON electronics, Austria), Alexander Kraetge, Stephan Koerber, Laurentiu-Viorel Badicu, Ole

Kessler, Ulrike Broniecki, Inho Hong

[OD5-06] Correlation between Electrical Measured Partial Discharges and Acoustic Emission Signals from New and Thermal Aged Pressboards in Oil

Seyed Amir Mahmood Najafi* (Leibniz Universität of Hannover, Germany), Abdolrahman Peimankar, Ernst Gockenbach, Hossein Borsi

SESSION OD6: Liquid Insulation Characteristics


[OD6-01] Partial Discharge Inception Voltage Characteristics of Mineral Oil of Different Electrode Arrangements N. Pattanadech* (Institute of High Voltage Engineering and System Management, Austria), F. Pratomosiwi, T.F. Sipahutar,

A.A.Kemma, B. Wieser,Suwarno, M. Muhr

[OD6-02] Surface Discharge Characteristics of Oil-paper Interface under Combined AC-DC Voltage Jin Fubao* (Tsinghua University, China), Zhou Yuanxiang, Sha Yanchao, Sun Qinghua, Huang Meng

[OD6-03] Investigation of the Static Electrification Phenomenon in Power Transformers with the Streaming Model Test Setup

J. A. Podesser* (Graz University of Technology, Austria), R. Schwarz, G. Pukel, B. Wieser, M. Muhr

[OD6-04] Design of Electromagnetic Partial Discharge Sensors for Power Transformers K. Gulnihar* (TUBITAK UME, Turkey), H. Cayci, M. Ugur

[OD6-05] Effects of DBDS on Performance of Paper Oil Insulation of Transformers J. Sundara Rajan* (Central Power Research Institute, India), Akshatha A

[OD6-06] Ion Concentration Triggered Breakdown of Oil- paper- insulation at High DC Voltage and Evaluation by FEM K. Backhaus* (Technische Universität Dresden, Germany), J. Speck, S. Großmann, R. Fritsche

SESSION OD7: Dielectric Properties in Liquid


[OD7-01] Simulation of Dielectric Frequency Response of Transformer Insulation System Yu Guo* (University of Southampton, UK), George Chen

[OD7-02] Calibration of Loss Measurement Systems for Large Power Transformers T. Steiner* (HIGHVOLT Pruftechnik Dresden GmbH, Germany), C. Bonin

[OD7-03] Application of the Dielectric Response on Drying Process of Power Transformers Martin Anglhuber* (OMICRON electronics, Austria), Stephanie Raetzke, Maik Koch

[OD7-04] Insulation Condition Diagnostics of Oil Impregnated Paper by Utilizing Power System Transients R. Nikjoo* (KTH Royal Institute of Technology, Sweden), N. Taylor, R. Clemence Kiiza, M. Ghaffarian, X. Wang, H. Edin

[OD7-05] Electrical Conductivity Measurement of Oil Impregnated Pressboard with Varied Electric Field Stress and Temperature

F. Pratomosiwi* (Graz University of Technology, Austria), N. Pattanadech, T.F. Sipahutar, G. Pukel, R. Schwarz, Suwarno, M. Muhr

[OD7-06] Dielectric Response Measurements in Frequency, Temperature and Time Domain M. Ohlen* (Megger Sweden, Sweden), P. Werelius, J. Cheng

SESSION PD: High Voltage Measuring Techniques: Dielectric Parameter, Space Charges, Partial Discharges

Thursday 29 August 2013, 08:30-12:00 HIT Lobby (6F)

[PD-01] Recent Experiences with Partial Discharges Measurements Using Variable Frequency Diagnosis on Power Cable Accessories

Adel Ahmed ElFaraskoury* (Extra High Voltage Research Centre, Egypt)

[PD-02] Effects of One-carrier Pulsed Injection and a DC Applied Voltage in the Dielectrics Liquid during Conduction N. Meftali, S. Bouazabia, D. Khelil* (USTHB, LSEI, Algeria)

[PD-03] Characteristics of AE Signals Obtained from Frequency Accelerated Deterioration Test with EP Rubber Masaki Sugiura* (University of Miyazaki, Japan), Takuma Miyake, Tatsuya Sakoda, Yoichi Tsutagawa, Hidefumi Kawagoe,

Masahiko Iguchi, Tomoyuki Nakagawa

[PD-04] A Research on Space Charge and Conduction Current in Polymeric Insulators by PEA Method with Reduced Measurement Cycle and Improved Resolution

Changwon Lee* (Honam University, Republic of Korea), Minwoo Gwak, Seung Hwangbo, June-Ho Lee

[PD-05] A Study on Insulation Characteristics of XLPE Power Cable due to the Influence of Moisture Eun-chun Lee* (K-water, Republic of Korea), Jae-chul Kim

[PD-06] Comparison of Partial Discharge Patterns in XLPE Cables Based Classification Defects Using Experimental and Theoretical Investigations

Sobhy S. Dessouky* (Faculty of Engineering-Port Said University, Egypt), Adel A. El Faraskoury, Waleed M.Elzanati

[PD-07] Partial Discharge Measurement of Medium Voltage Cables for Nuclear Power Plant C. H. Ha* (KHNP Central Research Institute, Republic of Korea), D. H. Lee

[PD-08] Detection and Characterization of Partial Discharge Behaviour in a Three Phase Compact GIS Bus Duct by Acoustic Method

Mritunjay Kumar* (BHEL Corporate R&D, India), M. Mohana Rao, AK Adikesavulu

[PD-09] Detection of Partial Discharges in SF6 Circuit Breakers at Field H. Tatizawa* (University of São Paulo, Brazil), W.R. Bacega, F. Bacega, A.F. Castro, M. Bottaro

[PD-10] A Method to Distinguish the Polarity of Partial Discharge Signals Young-Woo Youn* (Korea Electrotechnology Research Institute (KERI), Republic of Korea), Don-Ha Hwang, Kook-Hee Cho,

Jong-Ho Sun, Ki-Dong Song, Dong-Sik Kang

[PD-11] Measurement of Winding Currents during Impulse Testing of Power Transformers. Shunts vs. Inductive Sensors

A. Marinescu* (ICMET, Romania), I. Dumbravă

[PD-12] Observation of Partial Discharge Propagation Process in Insulation Silicone Gel Y. Hayase* (Fuji Electric Co., Ltd., Japan), K. Yamashiro, T. Takano

[PD-13] Investigation on Internal Sensor of Partial Discharge in the Joint of High Voltage XLPE Cable Zhen-dong Ge* (North China Electric Power University, China), Xiang Shi, Sheng-chuan Zhao, Guo-ming Ma, Wen-zhi

Chang, Cheng-rong Li, Xue-wei Chen, Li-gang Zhang, Zhi-ge Li

[PD-14] The Influence of Moisture on Dielectric Relaxation of Oil Impregnated Nomex on the Base of Dielectric Spectroscopy Measurements

M. Zenker* (West Pomeranian University of Technology, Poland), J. Subocz, S. Banaszak

[PD-15] Partial Discharge Characteristics of a Cylindrical Void in Oil-immersed Insulation under the Oscillating Lightning Impulse Voltage

Jianfeng Liang* (Xi'an Jiaotong University, China), Liang zhang, Junhao Li, Yanming Li

[PD-16] Automatic Monitoring on Discharge of Air Gap Outdoor and the Application of Neural Network in Discharge Voltage Prediction

X.Luo* (South China University of Technoogy, China), H.Q.Niu, H.R.Lin

[PD-17] Partial Discharge Measurement of OCP-tapes in Rotating Electrical Machines Thomas Berg * (Graz University of Technology, Austria), Jürgen Fabian, Philipp Pretis, Helmut Heinle, Christoph

Waclawiczek, Bernhard Brandstätter

[PD-18] Development A New Methodology to Measure Dielectric Strength of Elastomeric Materials C. Lothongkam* (BAM - Federal Institute for Materials Research and Testing, Germany), W. R. Habel, G. Heidmann,

E. Gockenbach

[PD-19] Study of Matching Circuit for Capacitor Voltage Divider Gongchang Yue* (Tsinghua University, China), Weidong Liu

[PD-20] Identification of Typical Partial Discharge in SF6 Gas Based on Gabor Distribution Theory and Artificial Neural Network

Z. Ren* (Xi'an Jiaotong Unieversity, China), M. Dong, M. Ren, A.C. Qiu

[PD-21] Corona Performance of the 400 kV Bundle Conductors and Insulator Strings M. Becan* (Elektroinstitut Milan Vidmar, Slovenia), M Babuder, B. Vertacnik, B. Volk, Z. Toros

[PD-22] A Novel Technique for On-line PD Localisation Based on PD Signal Propagation Characteristics in HV Power Cable

B. Sheng* (Glasgow Caledonian University, UK), C. Zhou, D. M. Hepburn, B. Alkali, W. Zhou, X. Dong

[PD-23] Insulation Degradation Characteristics of PPLP at the Cryogenic Temperature under DC Voltage Gijin Nam* (Daejin University, Republic of Korea), Donguk Kim, Jeongtae Kim

[PD-24] Study of Capacitive Coupler for High Voltage AC Measurement K. L. Wong* (RMIT University, Australia), A. L. Lyngcoln

[PD-25] Modelling and Classifying Partial Discharge Waveforms B. T. Phung* (University of New South Wales, Australia), R. Ambikairajah, J. Ravishankar

[PD-26] About Relation between Real and Apparent Charge of Partial Discharge A. Ovsyannikov* (JSK Elektrosetservice, Russian Federation), R. Arbuzov, A. Kovalenko, A. Gaivoronsky

[PD-27] The Characteristics Analysis of High Frequency Current Transformer Used for Partial Discharge Detection Wenlie Liang* (WinTech Co., Ltd, Taiwan), Shih-Chieh Yang, Jiann-Fuh Chen

[PD-28] Correlation between Electric and Acoustic Signals of Discharge Phenomenon at Different Electrical Stresses Seyed Amir Mahmood Najafi* (Leibniz Universität of Hannover, Germany), Ernst Gockenbach, Hossein Borsi

[PD-29] Dielectric Heating in Insulating Materials at High DC and AC Voltages Superimposed by High Frequency High Voltages

Matthias Birle* (Ilmenau University of Technology, Germany), Carsten Leu

[PD-30] Current Waveform Estimation of PD in Straight 154 kV GIS Using Electromagnetic Wave Propagation Simulation Kiichi Nishigouchi* (Kyushu Institute of Technology, Japan), Masahiro Kozako, Masayuki Hikita, Toshihiro Hoshino,

Shiro Maruyama, Takashi Nakajima

[PD-31] Electrical Conduction Currents in Polymeric Insulating Materials under Mixed High Voltage Stress K. Eisenhuth* (Ilmenau University of Technology, Germany), C.Leu

[PD-32] Analysis on Voltage Distribution Rate for Circuit-breaker Equipped with Identical Units in Series during Breaking Test Duties

Jung-Hyeon Ryu* (KERI, Republic of Korea), Seung-Jae Park, Hyeong-Kee Rhyou, Jin-Hwan Kim, Kern-Joong Kim

[PD-33] Electromagnetic Wave Radiation Characteristics of Partial Discharge Depending on Needle Electrode Material and Shape in SF6 Gas

R. Mizuno* (Nagoya University, Japan), H.Kojima, N.Hayakawa, M.Hanai, M.Yoshida, H.Okubo

[PD-34] Three Dimensional SEEA Charge Analyses on an Insulator Surface In Vacuum O. Yamamoto* (Reseach Institute for Applied Sciences, Japan), T. Umemoto, Y. Shimizu, H. Naruse

[PD-37] Frequency Dependence of the Dissipation Factor of PE/XLPE-Insulated Medium Voltage Cables S. Hadid* (Chemnitz University of Technology, Germany), U. Schmidt, W. Schufft, S. Rätzke

[PD-38] Study on Condition for Space Charge Measurement in Full Size HVDC Cables Kenta Mamiya* (Toyohashi University of Technology, Japan), Yoshinobu Murakami, Masayuki Nagao, Naohiro Hozumi,

Tatsuki Okamoto

[PD-39] Partial Discharges in SF6 Gas Void Defect under Standard Aperiodic and Oscillating Switching Impulses Ming Ren* (State Key Lab of Electrical Insulation & Power Equipment, China), Ming Dong, Aici Qiu,

[PD-40] Elimination of Sources of Interference while Measuring Dissipation Factor of Medium Voltage XLPE Cables B. Nageshwar Rao* (Central Power Research Institute, India)

[PD-41] Time Sequential Properties of Partial Discharge Current Pulses in SF6 Gas and Dry Air under DC Voltage Application

M. Okamoto* (Kyushu Institute of Technology, Japan), S. Ohtsuka

[PD-42] Optimal Sensors for PD Measurements on Medium Voltage Switchgear S. M. Hoek* (OMICRON electronics, Austria), A. Kraetge, Inho Hong, K. Rethmeier

[PD-43] Traceable Measurement of Dielectric Dissipation Factor at Very Low Frequency A. Bergman* (SP Technical Research Institute of Sweden, Sweden), S. Bergman, C. Hoffmann, E. Paulus, A-P. Elg

[PD-44] Sophisticated Measurement of PD current Pulses in Insulation Oil and the Effects of Deaeration Treatment on the Waveforms with the SHF_PDPW System

Minoru Fukuzaki* (Kyushu Institute of Technology, Japan), Takuya Matsumoto, Shinya Ohtsuka

[PD-45] A Neural Network Model Enabling Higher Pattern Recognition Rate for PDS at Cryogenic Temperature In-Jin Seo* (Hanyang University, Republic of Korea), Won Choi, Yong-Jo Lee, Ho-Jung Yoon, Ja-Yoon Koo

[PD-46] Investigation of Effect of Temperature Variation in a High Voltage Cable on Electrical Insulation C. F. Kumru* (Yildiz Technical University, Turkey), O. Arikan, C. Kocatepe, O. Kalenderli

[PD-47] Partial Discharge Measurement and Noise Removal on Power Cables Suna Bolat* (Eastern Mediterranean University, Turkey), Ozkan Altay, Ozcan Kalenderli

[PD-48] Development and Application of Portable Partial Discharge Measurement Detector Z. G. Xiao* (Xi'an Jiaotong University, China), M.Dong, M. Ren, J.G. Bi, Z. Ren

[PD-49] Design and Implementation of an Advanced Partial Discharge Analyzer Cheng-Chien Kuo* (Saint John's University, Taiwan), Hong-Chan Chang, Feng-Chang Gu, Po-Han Chen

[PD-50] Comparison of Partial Discharge Forms in Insulation Systems at DC in Air at Higher Pressure M. Florkowski* (ABB Corporate Research, Poland), B.Florkowska, J.Roehrich, P.Zydroń

[PD-51] Surface Charging and Discharging Characteristics of Silicone Rubber Material under HVDC Non-uniform Electric Field in Atmosphere

Wen-Wei Shen* (Xi'an Jiaotong University, China), Cheng-Can Li, Hai-Bao Mu, Jun-Bo Deng, Yu-Gan Niu, Jun-Liang Wang, Li-Miao Zhang, Yi-Qun Zhang, Guan-Jun Zhang

[PD-52] Investigations on DC Breakdown Voltage of Solid Barrier under Non-uniform Electric Field Phloymuk N.* (King Mongkut's University of Technology North Bangkok (KMUTNB), Thailand), Pruksanubal A., Tanthanuch N.

[PD-53] A Study on Propagation Characteristics of Partial Discharge Signals for Underground Cables Jong-Beom Lee* (Wonkwang University, Republic of Korea), Chae-Kyun Jung, Jeong-Tae Kim

SESSION OE1: Insulator 1


[OE1-01] Challenging Aspects in Design and Testing of UHV Bushing Paul Howard* (Alstom Grid, Italy), G. Testin, P. Cardano, M. Sehovac, M. Boutlendj, L. Perego, B. Brunelli, A. Pigini

[OE1-02] Investigation on the Electrical Behavior of Metal Oxide Pigments filled Silicone Gels A. Austermühl* (University of Kassel, Germany), A. Claudi

[OE1-03] Electrical Characteristics and Properties of a Stub (Damaged Toughened Glass Insulator) JM. George* (SEDIVER, France), S. Prat, S. Tartier, Z. Lodi

[OE1-04] On the Influence of Selected Test Parameters on the Retention of Hydrophobicity of Silicone Elastomers in the Dynamic Drop Test under Ac and Dc Stress

C. Bär* (University of Applied Sciences Zittau / Görlitz, Germany), R. Bärsch, J. Lambrecht, G. Simson

[OE1-05] Electrical Characteristics and Voltage Limiting Effect of Epoxy/ZnO-particle Composite Varistors Masafumi Mori* (Kyushu Institute of Technology, Japan), Shinji Ishibe, Masahiro Kozako, Masayuki Hikita

[OE1-06] Hydrophobicity Classification of Distribution Silicone Arresters before and after Solid Layer Contamination R.C. de Jesus* (UNICAMP, Brazil), J. Pissolato, J.L. de Franco, S.R. de Abreu, D.A. da Silva, M.A.A. Romano, E.C.M. Costa,

L.H.I. Mei



[OE2-01] Unobvious Hydrophobic State of HTV Composite Insulators Hanqi Dai* (Tsinghua University, China), Hongwei Mei, Liming Wang, Chenlong Zhao, Zhidong Jia, Zhicheng Guan

[OE2-02] Effect of Exposure Corona Discharge Against Nature of Change Hydrophobic Surfaces Specimen Ceramic High Voltage Insulator

Harry Prabowo* (Universitas Gadjah Mada, Fakultas Teknik, Indonesia), Tumiran

[OE2-03] Ageing of Silicone Rubber Insulators under High Voltage Direct Current: Results of Inclined Plane Testing and Materials Analyses

N. Mahatho* (Eskom Holdings SOC Ltd, South Africa), I.R. Jandrell, T. Govender, N. Parus

[OE2-04] Research on Breeze Vibration Test Method and Its Reliability of Composite Insulator as Tension String Jie Wei* (China Electric Power Research Institute, China), Qingfeng Li, Haifeng Gao

[OE2-05] Impact of Long Duration UV Ageing on Silicone Rubber and Filler Material S. Ganga* (Central Power Research Institute, India), N.Vasudev, G.R. Viswanath, R.S. Shivakumara Aradya

[OE2-06] Improvement of Heat Distribution in DAF-30 Type Bushings Aydogan Ozdemir * (Istanbul Technical University (I.T.U), Turkey), Ilim Erden, Suat Ilhan



[OE3-01] Assessment of Pollution on Outdoor High Voltage Insulators in Egypt M.A. Abouelatta* (Benha Universit-Shoubra Faculty of Engineering, Egypt), M.M. Abouelsaad, B.A. Arafa, M.E. Ibrahim

TOPIC EHigh Voltage Insulation Materials and System: Outdoor, Indoor, Gas Insulated, Nano-dielectric, Eco-friendly Materials and Applications

[OE3-02] Electro-thermal Model of DC Flashover Discharge of Polluted Insulator M. El-A. Slama* (University of Sciences and Technology of Oran, Algeria), A. Beroual, H. Hadi

[OE3-03] Effect of Insulator Application on the Leakage Current Performance of Woodpole Distribution Line Structures K.V. Thejane* (University of the Witwatersrand, South Africa), M.D. Ntshani, H.J. Geldenhuys, J.M. Van Coller, A.A. Beutel,

T.D. Mvayo, R. Watson, W.L. Vosloo, A. Khatri

[OE3-04] Improving the Performance of Silicone Rubber Insulator in Severe Environments M. Albano* (Cardiff University, UK), P. Charalampidis, H. Griffiths, M.A. Haddad, R.T. Waters

[OE3-05] An Experimental Study on Electrostatic Precipitator with Tar Contaminated HV Insulator through UHF Based PD Tests

Philipp Schröder* (Berlin Institute of Technology, Germany), Saravanakumar Arumugam, York Neubauer, Thomas Schoenemann

[OE3-06] Introduction to Decay-like Fracture of Composite Insulator Jiafu Wang* (Tsinghua University, China), Xidong Liang, Yanfeng Gao

SESSION OE4: Insulation Characteristics 1.


[OE4-01] Non-linear Dielectric Materials’ Practical Application in Stress Grading and Simulation Validation P.J. Howard* (Alstom Grid, UK), M. Fu, J.G.C. Samuel, F. Perrot, B. Lessard, A. Kavvalaki, M. Timothy

[OE4-02] Spatial-temporal Investigation of Breakdown Mechanism of Lightning Over-voltages: The Measurement System A. Shirvani* (Chemnitz University of Technology, Germany), W. Schufft, H.P. Pampel, U. Schmidt

[OE4-03] Application of Streamer Criteria for Calculations of Flashover Voltages of Gaseous Insulation with Solid Dielectric Barrier

Y.V. Serdyuk* (Chalmers University of Technology, Sweden), M.H. Ramesh, R.F. Summer, S. Singh, S.M. Gubanski, S. Kumara

[OE4-04] Development and Qualification of GRP Conical Barriers for UHVDC Convertor Transformer Bushings P.J. Howard (Alstom Grid Research & Technology, UK), F. Perrot, I.R. James, X. Lu, G. Testin, M. Sehovac, A. Pastore,

P-A. Monfils

[OE4-05] Investigations on Droplet Initiated Discharges under Hybrid Field Stress J. Knauel* (RWTH Aachen University, Germany), A. Wagner

[OE4-06] Dielectric Characteristics Analysis of Oil-paper Insulation under Lightning Impulse Voltage Qing Yang* (Chongqing University, China), Wenxia Sima, Potao Sun, Tao Yuan, Xing Lan, Chen Lu

SESSION OE5: Nano-dielectrics


[OE5-01] Mechanisms of Crossover Phenomenon in Tree Length vs. Applied Voltage Characteristics between Base Epoxy and Its Nanocomposites

Toshikatsu Tanaka* (Waseda University, Japan)

[OE5-02] Electrical Tree Partial Discharge Characteristics in Epoxy Nanocomposites D.R. Cornish* (University of the Witwatersrand, South Africa), C. Nyamupangadengu

[OE5-03] Influence of Nanosilica on the Performance of HTV Silicone Rubber for Outdoor Insulation A.D. Germano* (Technische Universität München, Germany), J. M. Seifert, J. Kindersberger

[OE5-04] Resistance to Surface Erosion of Epoxy Resins with Silica and Alumina Nanofillers Johannes Seiler* (Technische Universität München, Germany), Josef Kindersberger

[OE5-05] Vegetable Oil Based Liquid Nanocomposite Dielectrics in Divergent Electric Fields I.W. Serukenya* (University of Kwazulu Natal, South Africa), L. Chetty, N.M. Ijumba

[OE5-06] A Modified Model for Dielectric Loss Tangent of Transformer Oil-based Nanofluids J. Miao* (State Key Laboratory of Electrical Insulation for Power Equipment, China), M. Dong, L. P. Shen, H. Wang

SESSION OE6: Eco-friendly Oil


[OE6-01] AC Creeping Discharge over Pressboard Surface in Vegetable-based Oils R. Hanaoka* (Kanazawa Institute of Technology, Japan), F. Murdiya, R. Hashi, K. Miyagi, K. Takamoto, H. Kaneda,

S. Nishikawa, H. Koide

[OE6-02] Investigation of Statistical Breakdown in Mineral and Natural Ester Oils under AC Voltage Georgios D. Peppas* (University of Patras, Greece), Eleftheria C. Pyrgioti, Vasilios P. Charalampakos

[OE6-03] Combined Effect of Cellulose Particle and Moisture on Lightning Impulse Breakdown Voltages of Ester Transformer Liquids

Q. Liu* (The University of Manchester, UK), W. Lu, Z.D. Wang

[OE6-04] Dielectric Response of Pressboard Impregnated in Mineral Oil and Synthetic Ester F. Pratomosiwi* (Graz University of Technology, Austria), N. Pattanadech, A.A. Kemma, G. Pukel, R. Schwarz, Suwarno, M.

Muhr

[OE6-05] Study on Static Electrification of Aged Oil and Restrain Mechanism of BTA through Acceleration Test Kenichi Shima* (Kyushu Institute of Technology, Japan), Motoo Tsuchie, Masahiro Kozako, Masayuki Hikita, Hifumi Fukuda

[OE6-06] Breakdown Strength Analysis of the Transformer Insulation Oil due to Different Standards H. Akca* (Yildiz Technical University, Turkey), O. Arikan, C. Kocatepe, C. F. Kumru, R. Ayaz

SESSION OE7: Gas Insulation


[OE7-01] Leader Onset and Breakdown Mechanisms under Non-uniform Electric Field in Air H. Kojima* (Nagoya University, Japan), K. Hotta, N. Hayakawa, N. Yanagita, T. Kato, T. Rokunohe, H. Okubo

[OE7-02] Investigation of the Temperature Influence on the Breakdown Voltage in Gas Insulated Systems under DC Voltage Stress

Maria Hering* (Technische Universität Dresden, Germany), Steffen Grossmann, Joachim Speck, Uwe Riechert

[OE7-03] Influence of Particles on DC Dielectric Performance of Insulating Gas (SF6) Thomas Berg* (University of Technology Graz, Austria), Christoph Müller, Thomas Malcher, Michael Muhr, Denis Imamovic

[OE7-04] Transition Mechanism from Pre-discharge to Surface Flashover on Alumina Dielectrics in Vacuum Y. Nakano* (Nagoya University, Japan), H. Kojima, N. Hayakawa, K. Tsuchiya, H. Okubo

[OE7-05] Effect of Dielectric Coating on Breakdown Characteristics in Switchgear Su-Youl Woo* (Hyosung Corporation, Republic of Korea), Ki-Ryang Kwon, Kyoung-Bo Seo, Jin-Ho Kim

[OE7-06] Influence of the Gas Volume Size on Spacer Charging in SF6 under DC Stress M. Schueller* (ETH Zurich, Switzerland), C. M. Franck

SESSION OE8: SF6 Substitutes


[OE8-01] Predicting the Electric Strength of Proposed SF6 Replacement Gases by Means of Density Functional Theory M. Rabie* (ETH Zurich, Switzerland), C. M. Franck

[OE8-02] Improvement of Gaseous Insulation Performance by Gas/Solid Composite Insulation in High-pressure CO2 Takanori Yasuoka* (Toshiba Corporation, Japan), Masayuki Sato, Yoshikazu Hoshina, Akira Shimamura, Motoharu Shiiki

[OE8-03] A Study on the Lightning Impulse Breakdown Characteristics of Dry Air for Design of Eco-friendly Electric Power Apparatus

J. Y. Kim* (Hyundai Heavy Industries, Republic of Korea), Y. M. Kim, B. Y. Seok, J. H. Kwon, K. J. Lim

[OE8-04] AC Creepage Discharges in SF6, CO2, N2, and SF6-CO2 and SF6-N2 Mixtures A. Beroual* (Ecole Centrale de Lyon, University of Lyon, France), F. Sadaoui

[OE8-05] Calculation Model of Sparkover Voltage with Covered Electrode System in Dry Air A. Kumada* (The University of Tokyo, Japan), S. Matsuoka, S. Yokoyama, K. Hidaka, N. Inoue, T. Donen, M. Tsukima

[OE8-06] Study of Dielectric Breakdown Properties of 50%SF6-50%CF4 and 50%SF6-50%C2F6 Mixtures at Gas Temperatures up to 3000K

Xingwen Li* (Xi’an Jiaotong University, China), Hu Zhao, Shenli Jia, Zongqian Shi

SESSION OE9: Insulation Characteristics 2


[OE9-01] Outdoor Insulator Model Using Electric Circuit Based on Leakage Current Suwarno* (Institut Teknologi Bandung, Indonesia), A.W. Pradana

[OE9-02] Evaluating the Effect of Paint Coatings on the Corona Performance of Conductor Surfaces K.G. Ilunga * (University of KwaZulu-Natal, South Africa), L. Chetty, N.M. Ijumba, N.K. Chetty, Y. Singh

[OE9-03] Visual Ageing Comparison of Different Power Line Insulator Materials under HVAC and HVDC Excitation at a Coastal Site

G. N. J. Mouton* (NamPower, Namibia), H. J. Vermeulen, J. P. Holtzhausen, W. L. Vosloo

[OE9-04] A Study on Electrical Breakdown Characteristics of Epoxy Resin for Cast Epoxy Resin Transformers K. H. Lee* (Hyundai Heavy Industries Co. Ltd., Republic of Korea), Y. H. Kim, B. Y. Seok

[OE9-05] Dynamic Analysis of Composite Insulator Sheds in High Velocity Wind Field Zheng-yi Zhu* (Tsinghua University, China), Yan Meng, Zhen-quan Zhang, Guo-xiang Ma, Xi-lin Wang, Zhi-dong Jia

[OE9-06] Non-thermal Plasma Jet and its Application in Surface Modification Lipeng Zhong* (Xi'an Jiaotong University, China), Shengchang Ji Zhong, Zhiyuan Hao

SESSION PE: High Voltage Insulation Materials and System: Outdoor, Indoor, Gas Insulated, Nano-Dielectric, Eco-friendly Materials and Applications

Monday 26 August 2013, 13:30-17:00 HIT Lobby (6F)

[PE-01] Degradation of Silicone Rubber Insulators under the Effect of Acid Immersion Bahaa A. Arafa* (Egyptian Electricity Holding Company - Extra HV research cennter, Egypt)

[PE-02] Investigations on Nanocomposites for Outdoor Insulators under Environmental Conditions M. M. Saei Shirazi* (Leibniz Universität of Hannover, Germany), H. Borsi, E. Gockenbach

[PE-03] Generic Pollution Performance Curves for Different Types of Insulators Igor Gutman* (STRI, Sweden), Peter Sidenvall, Jan Lundquist

[PE-04] Analysis of Icicle Growth Process of Composite Insulator under Energized Condition and Its Impact Factors Zhicheng Guan * (Graduate School at Shenzhen, Tsinghua University, China), Zhidong Jia, Hao Jiang, Yu Deng, Tianzheng Wang,

Kangning Wang

[PE-05] Evaluation of AC and LI Breakdown Strength of Electrodes with Thick Eielectric Coating in SF6 and Dry Air D. van der Born* (Delft University of Technology, Netherlands), A. Girodet, P.H.F. Morshuis, J.J. Smit

[PE-06] The On-line Precise Positioning System of HV Transmission Lines Wind Deflection Based on RTK GPS Technology

Zhiqiang Feng* (Whuan University, China), Xishan Wen, Hailiang Lu

[PE-08] Ingredient of CNTs Dispersed by Barrier Discharge in Organic Solvents S. Hashimoto* (Kanazawa Institute of Technology, Japan), R. Hanaoka, A. Kono, K. Miyagi, N. Osawa, Y. Kanamaru, H. Anzai

[PE-09] Failure Cause Analysis of 765kV Polymer Insulators Installed at Thermal Power Plants Switchyard Yunseog Lim* (KEPCO Research Institute, Republic of Korea), Younghong Kim, Hoseong Ahn, Sangbeom Kim, Kooyong Shin,

Dongil Lee

[PE-10] Anti-icing Performance of Insulators by Special Surface Treatments K. Kondo* (NGK Insulators, Ltd., Japan), T. Hayashi, T. Nakachi, M. Maeda, N. Sugawara, D. Nishimura

[PE-11] Propagation Characteristic of Surface Discharge under AC Application Voltage Junbo Deng* (Xi'an Jiaotong University, China), Hui Ni, Lu Pu, Haibao Mu, Guanjun Zhang, Akiko Kumada, Kunihiko Hidaka

[PE-12] Development of 72 kV Dry Air Insulated Switchgear by Using Vacuum Circuit Breaker with Electromagnetic Actuators

Tomohiro Moriyama* (Hitachi, ltd, Japan), Jun Nukaga, Tatsuro Kato, Toshiaki Rokunohe

[PE-14] Experimental Study of Partial Discharge Insulating Properties for the Feasibility of CF3I/CO2 Substituting SF6

Song Xiao* (State Key Laboratory of Power Transmission Equipment and System Security and New Technology, China), Xiaoxing Zhang, Junjie Zhou, Ju Tang

[PE-15] Dynamics of a Water/Air Interface on Insulating Solid Surface Submitted to DC High Voltage J. Ndoumbe* (Ecole Centrale de Lyon/University of Douala, France), A. Moukengue Imano, A. Beroual

[PE-16] Effects of Addition of Nano-scale Silica Filler on Erosion, Tracking Resistance and Mechanical Properties of Silicone Rubber

Ryo Inoue* (NGK INSULATORS, LTD., Japan), Takanori Kondo, Tomoya Nakamura, Masahiro Kozako, Masayuki Hikita

[PE-17] Humidity Influence on AC Lightnin Impulse Breakdown Characteristics of Dry-air J. K. Seong* (Hanyang University, Republic of Korea), J. S. Hwang, J. G. Lee, K. B. Seo, D. H. Jeong, B. W. Lee

[PE-18] Coated Large Electrodes for Corona Prevention M. Larsson* (ABB AB, Corporate Research, Sweden), O. Hjortstam, L. Ming, L. Arevalo, D. Wu

[PE-19] Surface Flashover Characteristics of GFRP in SF6, CF4, N2 gases for the Design of Cryogenic Bushing W.J. Shin* (Hanyang University, Republic of Korea), J.S. Hwang, J.K. Seong, J.G. Lee, B.W. Lee

[PE-20] Acoustic Characteristic of Surface Discharge for Hydrophobicity Evaluation of HVDC Insulator Yong Liu* (Tianjin University, China), B. X. Du

[PE-21] Electric Field Relaxation by Adding Small Conductivity on GIS Spacer Surface K. Kato* (Niihama National College of Technology, Japan), J. Ishiguro, N. Hayakawa, H. Okubo

[PE-22] Moisture Diffusion on the Crystalline Surface of Transformer Insulation Paper under External Electric Field by Molecular Dynamic Simulation

Youyuan Wang* (Chongqing University, China), Tao Yang, Miao Tian, Peng Fan

[PE-23] Impulse Breakdown Characteristics of Rod-plane Electrode System with Covered Rod as Silicone Rubber J. Y. Sim* (ChungBuk National University, Republic of Korea), J. H. Kwon, Y. J. Park, K. J. Lim

[PE-24] Lightning Impulse and AC Breakdown Characteristics of CO2 Gas under Quasi-uniform Electric Field Using Real-size Gas-insulated Switchgear Model

S. Ka* (Mitsubishi Electric Corporation, Japan), K. Inami, Y. Shimizu, H. Hama, G. Ueta, J. Wada, S. Okabe

[PE-25] A Fundamental Characteristics of Mini-model HTS DC Cable Woo-Jin Kim* (Gyeongsang National University, Republic of Korea), Hae-Jong Kim, Jeon-Wook Cho, Sang-Hyun Kim

[PE-26] A Study on Sheds and Bubbles for HTS Bushing at Cryogenic Temperature W. J. Kim* (Gyeongsang National University, Republic of Korea), S. H. Kim

[PE-27] Effect of NO on Increase of Supplied Electrons Number under Repetitive Discharge in N2/NO Gas Mixture Yasutaka Ishiwata* (Tokyo City University, Japan), Toru Iwao, Motoshige Yumoto

[PE-28] Analysis of Degradation Characteristics for Insulation Materials of HVDC XLPE Cables Donguk Kim* (Daejin University, Korea, Republic of Korea), Gijin Nam, Jeongtae Kim

[PE-29] A Study on Optimal Insulation Design of the Ultra High Voltage Spacer Using Boundary Element Method Hyoungwoo Lim* (Iljin electric, Republic of Korea), Dongik Hwang, Jichul Kim, Wangbyuck Suh

[PE-30] Comparing Partial Discharge Behavior of Indoor Al2O3 and TiO2 Nanocomposites during Thermal Stresses M. M. Saei Shirazi* (Leibniz Universität of Hannover, Germany), H. Borsi, E. Gockenbach

[PE-31] The Impact on the Short-Arc Time of Half-self-extinguish SF6 Circuit Breaker while Optimizing the Structure of Nozzle

X. Dong* (Tongji University, China), L. J. Jin, S. Q. Li, S. J. Yan, W. H. Zhang

[PE-32] Analysis of Electric Field Distribution along the Insulator Surface by Genetic Algorithms S. Bolat* (Eastern Mediterranean University, Turkey), R. Gholizadeh

[PE-33] Influence of Charged Milli-size Metallic Particle on DC Sparkover Voltage under Quasi-Uniform Field Gap Daisuke Kunishige* (Fukuoka University, Japan), Yusuke Koba, Takao Matsumoto, Yasuji Izawa, Kiyoto Nishijima

[PE-34] Influence Regularity of Trace O2 on SF6 Decomposition Characteristic under Partial Discharge Fuping Zeng* (Chongqing University, China), Ju Tang, Xiaoxing Zhang

[PE-35] Ice-repellent Behavior of Superhydrophobic Al Surface Se Won Han* (KERI(Korea Electrotechnology Research Institute), Republic of Korea), Jin Jeong, Dong Pill Kang, Dae Ho Lee

[PE-36] Improvement of Withstand Voltage Performance under Heavy Rain Condition of Hollow Core Insulators with Larger Water-cut Sheds

K. Kondo* (NGK Insulators, Ltd., Japan), J. Zhou, X. Yu, R. Huang and Z. Su

[PE-37] Forecasting Method for Leakage Current of Contaminated Insulator under Saturated Moist Chen-Long Zhao* (Electrical Engineering, China), Han-Qi Dai, Li-Ming Wang, Hongwei Mei, Zhicheng Guan, Zhi-Cheng

Zhou, Song Gao

[PE-38] A Study on the Relation Between Leakage Current and Specific Creepage Distance M. Rostaghi-Chalaki* (Research assistant of University of tehran, Iran), A. A. Shayegani-Akmal, H. Mohseni

[PE-39] Investigation on Leakage Current of ZnO Surge Arrester under Thermal and Artificial Pollution M. Rostaghi-Chalaki * (Research Assistant of University of Tehran, Iran), H. Hamidi, I. Ahmadi-Joneidi, A. A. Shayegani-

Akmal

[PE-40] Effect of Exposure Corona Discharge against Nature of Change Hydrophobic Glass Surfaces Specimen High Voltage Isolator

Harry Prabowo* (Universitas Gadjah Mada, Fakultas Teknik, Indonesia), Tumiran

[PE-42] Partial Discharge of Polymeric Insulators under Artificial Pollution H. Saadati* (University of Tehran, Iran), A.A Shayegani, H. Borsi, E. Gockenbach

[PE-43] Calculation of Leakage Current and Electric Field of Polymeric Insulator under Pollution Layer I. Ahmadi-Joneidi* (Research assistance of High voltage labratory, Iran), M. Rezaei, M. Modarres, J. Sahragard

[PE-44] Influence of Dilute CO2 Concentration on AC/DC Sparkover in Atmospheric Air Daisuke Shimizu* (Fukuoka University, Japan), Tatsuya Ogawa, Takao Matsumoto, Yasuji Izawa, Kiyoto Nishijima

[PE-45] Study on Reliability and Experience of Composite Insulators Used as Tension String of 1000kV UHV AC Transmission Lines in China

Qingfeng Li* (Tsinghua University, China), Jie Wei, Liming Wang, Haifeng Gao, Xuejun Zhang

[PE-46] Experimental Study on Electrical Properties of Outdoor Insulator Made from Silane Epoxy Resin Tumiran* (Gadjah Mada University, Indonesia), Abdul Syakur, Guan-Jun Zhang

[PE-47] Hydrophobicity Classification of Distribution Silicone Arresters before and after Immersion in Deionized Water

R. C. de Jesus* (UNICAMP, Brazil), J. Pissolato, J. L. de Franco, S. R. de Abreu, D. A. da Silva, M. A. A. Romano, E. C. M. Costa, L. H. I. Mei

[PE-48] An Experimental Investigation on the Creepage Discharge Characteristics of the Pressboard in Mineral Oil under DC and Impulse Voltages

Ja-Yoon Koo* (Hanyang University, Republic of Korea), Young-Jo Lee, In-Jin Seo, Zheng-Xue Nan, Sung-Joo Cho, Yong-Han Kim, Bok-Yeol Seok

[PE-49] An Experimental investigation on VBD of PPLP Consider PD Inception at Cryogenic Temperature In-Jin Seo* (Hanyang University, Republic of Korea), Young-Min Choi, Won Choi, Ho-Jung Yoon, Ja-Yoon Koo

[PE-50] Impulse Corona Inception in the Coaxial Cylindrical Electrode Arrangement in Air: Effects of the Steepness of the Applied Voltage

P. N. Mikropoulos * (Aristotle University of Thessaloniki, Greece), V. N. Zagkanas

[PE-51] Determination of the Capacitance of Long Transformer Oil Gaps with Insulating Barriers F. Guerbas* (Université des sciences et technologie Houari Boumediene USTHB, Algeria), M. Zitouni, A. Boubakeur, A. Beroual

[PE-52] Harmonic Analysis of Leakage Current of Silicon Rubber Insulators in Clean-fog and Salt-fog M. Rostaghi-Chalaki* (Research assistant of University of tehran, Iran), A. A. Shayegani-Akmal, H. Mohseni

[PE-53] Effect of Dielectric Surface Charge Accumulation on the Electric Field at Electrode-dielectric-vacuum Triple Junction

Guo-Qiang Su* (Xi'an Jiaotong University, China), Hai-Bao Mu, Wen-Wei Shen, Bai-Peng Song, Guan-Jun Zhang

[PE-54] Electrical Tree Propagation Time to Breakdown for Epoxy Resin Composites Containing Alumina and Silica Nanoparticles

R. Kochetov* (Delft University of Technology, Netherlands), T. Andritsch, U. Lafont, P.H.F. Morshuis, J.J. Smit

[PE-55] The Application of Volume Resistivity Test in Actual Operation State of Composite Insulators Aging Laboratory Evaluation

Liu Yunpeng* (North China Electric Power University, China), Chen Yixin, Liang ying

[PE-56] Flashover Characteristics of 33 kV Long Rod Insulator Depending on Snow Conductivity and Fluctuation of Activity of Artificial Snowstorm

Noriyoshi Sugawara* (Kitami Institute of Technology, Japan), Kohei Yaji, Hiroya Homma, Masato Watanabe, Teruo Aso

[PE-57] Research on the Background Current in TSC measurement Liang Ying * (North China Electric Power University, China), Li Cong, Lv Fang-cheng, Liu Yun-peng

[PE-58] A Study on Computational Fluid Dynamics and Dielectric Breakdown Prediction between Contacts in Gas Circuit Breaker

Y S Lee* (LS Industrial Systems Co., Ltd., Republic of Korea), B H Bang, J U Choi, H S Ahn, S W Park

[PE-59] Development of 72.5kV Vacuum Interrupter for Eco-friendly Circuit Breaker Jaeseop Ryu* (LS Industrial Systems Co., Ltd., Republic of Korea), Jongwoong Choi, Seokweon Park

[PE-60] The Temperature Distribution and Rise Test of Pole Mount Dry-type Transformer for Power Distribution Han-Goo Cho* (Korea Electrotechnology Research Institute(KERI), Republic of Korea)

[PE-61] Impulse Breakdown Characteristics of Dry-air under Quasi-uniform Field at the Coated Electrode System Yong-Jun Park* (Chungbuk National University, Republic of Korea), Kee-Joe Lim

SESSION OF1: Transformer Diagnosis 1


[OF1-01] Precision Improvement of Dissolved Gas Analysis in Oil for Transformer by Stripping Extraction Method K. Takamoto* (Kanden Engineering Corporation, Japan), Y. Oura, R. Hanaoka, K. Miyagi

[OF1-02] The Methods of Detection and Diagnosis for Abnormalities in 115 kV Current Transformer A. Tong-in* (Electricity Generating Authority of Thailand, Thailand)

[OF1-03] Hydrogen and Carbon Monoxide Sensing Properties of Silver-doped Tin Oxide Gas Sensor and Its Mechanism Qu Zhou* (Chongqing University, China), Weigen Chen, Lingna Xu, Shudi Peng

[OF1-04] On Site Measurement on Power Transformers Using the Whole Testing Toolbox Markus Puetter* (Omicron, Austria), Christian Enk, Inho Hong, Michael Krüger, Alexander Kraetge

[OF1-05] Electric Degradation of Insulating Systems of Power Transformer Connected to Renewable Energy Source P. Trnka* (University of West Bohemia, Czech Republic), M. Sirucek, R. Haller, R. Polansky, P. Prosr

[OF1-06] Oil-Paper Insulation Aging Evaluation Based on Frequency Domain Spectroscopy Jie Tian* (Shenzhen Power Supply Co. LTD, China), Sen-Jing Yao, Peng Yu, Fan Bai, Ming-Jie Tang, Guan-jun Zhang



[OF2-01] Interpretation of FRA Data for Diagnosing Transformer Outer Winding Movements from Transfer Function Parameters

Pradeep M. Nirgude* (Central Power Research Institute, India), K. Sahitya Yadav, M. Prameela

[OF2-02] The Application of SFRA in the Diagnosis of Transformer Winding Deformation Liang Lv* (Xi`an Jiaotong University, China), Liang Xiaochen, Ji Shengchang, Wang Wei

[OF2-03] Transformer Core Influence on Frequency Response Spectrum Oscillations B.T. Phung* (University of New South Wales, Australia), Mehdi Bagheri, Trevor Blackburn

[OF2-04] Technique for On-site Demagnetization of Power Transformers Using a Portable Device, Basics and Validation by Frequency Response Analysis

Santiago González (Haefely Test AG, Switzerland)

[OF2-05] Estimating Series Capacitance from Measured FRA-single Isolated and 3-Ф Transformer Winding Results Saurav Pramanik* (Indian Institute of Science, India), L. Satish

[OF2-06] Experimental Investigating on On-line Transformer Winding Deformation Diagnosis Based on Current Deviation Coefficient Method

Ming Shen* (Shanghai Jiao Tong University, China), Yi Yin, Zhihao Wang, Zhe Li



[OF3-01] Influence of Various Stresses on the Physicochemical Properties of Transformer Oil S. Boudraa* (University of Laghouat, Algeria), I. Fofana, L. Mokhnache

[OF3-02] Analysis of Fault Gas Losses through the Conservator Tank of Free-breathing Power Transformers A. Müller* (University of Stuttgart, Germany), S. Tenbohlen

TOPIC FMonitoring and Diagnostics: Evaluation Procedures, Knowledge Rules, Data Mining, Smart Sensors and Applications

[OF3-03] New Techniques for Dynamic Resistance Measurements on Load Tap-changers Matz Ohlen* (Megger Sweden, Sweden), Nils Wäcklen, Rene Yvrard

[OF3-04] Factory and On-site Distribution Transformer Testing: Requirements and Possibilities with Variable Frequency Power Sources

J. Stolz* (Haefely Test AG, Switzerland), L. Brocke

[OF3-05] Vibration Analysis of Power Transformers M. Beltle* (University of Stuttgart, Germany), S. Tenbohlen

[OF3-06] Analysis of Time/Frequency Domain Spectra and Characteristic Parameters of Bushing Condenser Body Ming-jie Tang* (Xi'an Jiaotong University, China), Min Lei, Fan Bai, Yun-cai Lu, Peng Wu, Meng-zhou Zhu, Guan-jun Zhang



[OF4-01] Partial Discharge Induced Electromagnetic Wave Propagation Analysis and Detection Using UHF Sensor in Transformer

Masayuki Hikita* (Kyushu Institute of Technology, Japan), Norio Morita, Masahiro Kozako, Soh Yoshida, Masaki Uchiyama, Shin Yamada

[OF4-02] New Methods for Multisource PD Localization on Power Transformers by an Acoustic Sensor Array M. Siegel* (University of Stuttgart, Germany), H. O. Kristiansen, S. Tenbohlen

[OF4-03] Aging and Deterioration Analysis on 25 kV and 34.5 kV OIP Bushings in EGAT, Thailand S. Suksagoolpanya* (Electricity Generating Authority of Thailand (EGAT), Thailand), A. Tong-in

[OF4-04] Aging of Oil Impregnated Paper due to Pd Activity Interface M.G. Niasar* (KTH Royal Institute of Technology, Sweden), R.C. Kiiza, X. Wang, R. Nikjoo, H. Edin

[OF4-05] Assessment of UHF PD Monitoring Data by Means of Pattern Recognition A. Müller* (University of Stuttgart, Germany), M. Beltle, M. Siegel, S. Tenbohlen

[OF4-06] Application of UHF Method for the Measurement of Partial Discharges in the Transformer Model S. Yoshida* (Toshiba Corporation, Japan), K. Kono, M. Uchiyama, S. Yamada, N. Morita, M. Kozako, M. Hikita

SESSION OF5: Cable Diagnosis


[OF5-01] Temperature Dependency of Wave Propagation Velocity in MV Power Cable Yan Li* (Eindhoven University of Technology, Netherlands), Peter A. A. F. Wouters, Paul Wagenaars, Peter C. J. M. van der Wielen,

E. Fred Steennis

[OF5-02] Diagnostics and Localisation of Faults in Cable Sheath through Sheath Circulating Current Monitoring in Cross-bonded Three-phase HV Cables

Xiang Dong* (Glasgow Caledonian University, UK), Xiaoping Jing, Chengke Zhou, Wei Jiang, Wenjun Zhou, Bojie Sheng

[OF5-03] Influencing Factors Analysis of Cable Failure Using Cox Proportional Hazard Model Zeyang Tang* (Wuhan University, China), Wenjun Zhou, Chengke Zhou, Jianhui Yu

[OF5-04] Condition Assessment and Maintenance of Aging Cables by Surface Wave Joint Time-frequency Reflectometry D. L. Coats* (University of South Carolina, USA), M. N. Alam, Q. Deng, C. K. Lee, M. Ali, Y. J. Shin

[OF5-05] Application of Statistical Analysis for Evaluating Accelerated Life Test Results for Polymeric Insulators for Power Cable

J.H. Lee* (Hoseo University, Republic of Korea), K.H. Kwon

[OF5-06] Study on Condition for Voltage Application to Locate Water Tree Degradation of XLPE Cable MyongHwan Kim* (Toyohasi University of Technology, Japan), Naohiro Hozumi, Yoshinobu Murakami, Masayuki Nagao,

Takashi Kurihara, Tatsuki Okamoto, Taizo Tsuji, Katsumi Uchida

SESSION OF6: GIS Diagnosis


[OF6-01] Diffraction Phenomenon and Propagation Properties of Discharge-Emitted Electromagnetic Wave around the Operating GIS Equipment

T. Umegane* (Kyushu Institute of Technology, Japan), H. Shibata, R. Fuchi, S. Ohtsuka, A. Izena, H. Fukuda

[OF6-03] Online Estimation of PD Location Using Attenuation Rate Analysis of Electromagnetic Signal in GIS C. S. Park* (Electro Electric Systems/Hyundai Heavy Industries Co., Ltd., Republic of Korea), B.W. Min, J.H. Kim, C.Y. Hong

[OF6-04] Surge Arrester Monitoring Based on Analysis of the Total Leakage Current by ART Networks George R. S. Lira* (Federal University of Campina Grande, Brazil), Edson G. Costa

[OF6-05] Insulation Characteristics of Epoxy Insulators with Internal Micro-defects S. Ka* (Mitsubishi Electric Corporation, Japan), M. Miyashita, C. Nishida, M. Kamei, G. Ueta, J. Wada, S. Okabe

[OF6-06] Diagnosis and Identification of the Spark Discharge in Gas Insulated Substation (GIS) Wenjun Zhou*(Wuhan University, China), Li Li, Jun Chen, Xiaodian Li, Yongyan Zhou, Xiaoguang Zheng, Weijian Yao,

Jianhui Yu, Baoshan Wang, Hui Hu

SESSION OF7: Rotator Diagnosis


[OF7-01] Computational Methods for Designing of End-winding Corona Protection M. Wei* (Technische Universität Dresden, Germany), J. Speck, S. Großmann

[OF7-02] Partial Discharges Measurement on Stator Bar Insulation Josef Pihera* (University of West Bohemia, Czech Republic), Rainer Haller, Petr Mráz

[OF7-03] Key Thermal Ageing Indicators of Epoxy-mica Insulation Based on Spectroscopic and Thermo Analytical Techniques

B. Nageshwar Rao* (Central Power Research Institute, India), J. Sundara Rajan

[OF7-04] Accelerated Multi-factor Aging Tests for Qualification of High Voltage Stator Winding Insulation Systems used in Large Rotating Machines

C. Foelting* (Technical University of Dortmund, Germany), F. Jenau, J. R. Weidner

[OF7-05] A 200MVA Turbo-alternator Output Power Improvement by Insulation System Modification M. Shadmand*(Mapna Generator Engineering and Manufacturing Co. (PARS), Iran), T.Enayati Ahangar

[OF7-06] A Multiscale Numerical Technique for the Simulation of Partial Discharges A. Villa*(RSE - Research on the Energetic System, Italy), L. Barbieri, R. Malgesini

SESSION PF: Monitoring and Diagnostics: Evaluation Procedures, Knowledge Rules, Data Mining, Smart Sensors and Applications

Wednesday 28 August 2013, 08:30-12:00 HIT Lobby (6F)

[PF-01] Development of Condition Monitoring and Diagnosis System for Ultra High Voltage GIS based on IEC61850 Ji-Hoon Lee* (KEPCO KDN, Republic of Korea), Yeong-Jae Myoung, Duck-Ki Seo, Jong-Pil Choi

[PF-02] Influence of Temperature on Characteristics of On-line Partial Discharge on Hydrogenerator Stator Windings Using Acoustic Emission Measurement Method

Tadamitsu Kaneko* (Miyazaki Municipal University, Japan), Osamu Takenouchi, Noriyuki Hayashi, Tatsuya Sakoda

[PF-03] Radial Temperature Distribution of AAAC Overhead Line in Stationary and Transient Conditions M. Kang* (ETH Zurich, Switzerland), M. Strobach, C. M. Franck

[PF-04] Study on Detection Characteristic of Tin Oxide Nanoparticles Gas Sensor to a Traces of Hydrocarbon Gases in Transformer Oil

Qianzhu Li * (State Key Laboratory of Power Transmission Equipment and System Security and New Technology, China), Weigen Chen, Wen Zeng, Qu Zhou, Gang Liu

[PF-05] The Simulation and Research of Disequilibrium Moisture Distribution in Oil-paper Insulation Y. Liu* (Xi’an Jiaotong University, China), M. Dong, R. Liu, X. Z. Wu

[PF-06] Identification of Different PD Sources Using Laboratory Measurements Mohamad Ghaffarian Niasar* (KTH Royal Institute of Technology, Sweden), Demetres Evagorou, Patrick Janus, Hans Edin

[PF-07] Application of transfer functions for detecting winding faults by impulse method Chae-Hwa Shon* (Korea Electrotechnology Research Institute(KERI), Republic of Korea), Sang-Hwa Yi, Heun-Jin Lee,

Don-Ha Hwang, Jong-Ho Sun, Dong-Sik Kang

[PF-08] Influence Assessment of Aging Factors for Condition Monitoring of MV Cables Using the Neural Network Jangseob LIM* (Mokpo National Maritime University, Republic of Korea), Taewan KIM, Narae PARK, Yonghyun KIM,

Donghyeong LEE, Yoenha JUNG, Sungmin KIM, Beongsuk KIM

[PF-10] Surge PD Test Setup and a Sensors for Monitoring Turn Insulation of AC Motor Stator Windings Sang-Hwa Yi* (Korea Electrotechnology Research Institute(KERI), Republic of Korea), Young-woo Yoon, Don-Ha Hwang,

Kook-Hee Cho, Jong-Ho Sun, Dong-Sik Kang

[PF-11] Power Grid Intelligence: Utility challenges on Advanced Metering Infrastructure Deployment and the Use of Meters as Smart Grid Sensors

H. Madhoo* (University of Witwatersrand and Eskom SOC, South Africa), W. Cronje, K. Subramoney

[PF-12] Optical Fiber Composite Power Cable Solution for MV Smart Grid Dong Yun Wee* (LS Cable and System Ltd., Republic of Korea), Choong Hwan Lee, Jae Hee Byoun, Seok Hyun Nam

[PF-13] Enhanced Hydrocarbons Sensing Properties of PD-Decorated Flower-Like Tin Oxide Nanostructures Qu Zhou* (Chongqing University, China), Weigen Chen, Lingna Xu, Shudi Peng

[PF-15] Development of the On-line iPDM(intelligent Partial Discharge Monitoring) System for High Voltage Power Transformer

Soojin Lee* (HYOSUNG Corporation, Republic of Korea), Young-Min Kim, Jae Ryong Jung, Hang Jun Yang

[PF-17] Method to Locate Flashover Tower Based on the Flow of Fault Currents H. Lin* (STATE GRID Corporation of China, China), S. Yang, Y. Wang, W. Zhou, M. Ni, J. Yu

[PF-18] Diagnostics of Transformer’S Active Part Mechanical Condition with Complementary FRA and Vibroacoustic Measurements

S. Banaszak* (West Pomeranian University of Technology, Poland), E. Kornatowski, M. Zenker

[PF-19] A Developed Integrated Interpretation Method of DGA Based on Fuzzy Logic for Transformer Fault Diagnosis Qing-min Li* (North China Electric Power University, China), Xue-lei Wang, Rui Yang, Cheng-rong Li, Qi Su, Shu-guo Gao

[PF-20] Implementation of Partial Discharge On-line Monitoring System Based on Three-phase Comparison Method Bai Xue-Ling* (Beijing Sifang Automation Co.,LTD., China), Wang Ying-Ying, Zhao Wei-Hua

[PF-22] Salt Detection on High Voltage Insulators by Means of a LIBS System G. Pirovano* (RSE, Italy), S. Musazzi, U. Perini, E. Golinelli, F. Barberis

[PF-23] Conductors Sag Monitoring of an Innovative Conductor by Means of a Laser Based Measuring System G. Pirovano* (RSE, Italy), E. Golinelli, U. Perini, F. Barberis, S. Musazzi

[PF-24] An Innovative Electro-optic Sensor for AC and DC Electric Field Detection: Experimental Results G. Pirovano* (RSE, Italy), U. Perini, F. Barberis, R. Bratovich, A. Barberis

[PF-25] Influence of Transformer Oil Aging Byproducts on the Dissolved Gas Analysis E. Gockenbach* (Schering Institute, University of Hanover, Germany), I. Fofana, M. Imani, M. Farahani, H. Borsi

[PF-26] Uncertainly Analysis of the 3D Lightning Location System Based on Difference of Time of Arrival Li Cai* (Wuhan University, China),Tao Zhang, Janguo Wang , Wansheng dong , Sihan Zhang, Zhuojun Wu

[PF-27] The Characteristics of Vibration Signal Measured on the Oil –Filled Transformer Tank Shengchang Ji* (Xi'an Jiaotong University, China), Lv Liang, Niu Bo, Huang Guoqiang, Wang Sen

[PF-28] Recognition of Partial Discharge Source by Pattern Analysis in SF6 Insulation Dae-Won Park* (Korea Maritime University, Republic of Korea), Chang-Hwan Jin, Gi-Woo Jung, Gyung-Suk Kil, Young-Min Kim,

Kyung-Rok Hwang

[PF-29] Comparison of Overhead Conductor Temperature Measurements and Estimations Acquired from Multiple Systems Installed on a Single Overhead Line

G. Lakota* (EIMV - Elektroinštitut Milan vidmar, Slovenia), J. Kosmač, M. Marinšek, B. Barl, J.Kostevc

[PF-30] High Sampling Rate Measuring System of the Atmospheric Parameters for a Dynamic Thermal Rating of Power Transmission Lines

Vladimir Djurica* (Elektroinstitut Milan Vidmar, Slovenia), Matija Naglič, Janko Kosmač, Marko Hrast, Boštjan Barl

[PF-31] Detection and Frequency Analysis of Partial Discharge Pulse in Transformer Insulation Dae-Won Park* (Korea Maritime University, Republic of Korea), Jung-Yoon Lee, Min-Su Kim, Se-Jin Kim, Gyung-Suk Kil

[PF-32] Calibration of a Partial Discharge Sensor in a Gas Insulated Switchgear Hyang-Eun Jo* (Korea Maritime University, Republic of Korea), Dae-Won Park, Gyung-Suk Kil, Young-Min Kim, Sung-Wook Kim

[PF-33] Investigation of Dielectric Response in Relation to the Degree of Polymerization of Oil Impregnated Cellulose Insulation

M. Farahani* (Leibniz Universitaet Hannover, Germany), M.T. Imani, E. Gockenbach, H. Borsi

[PF-34] Using Ferrite to Improve Directional Sensing for Pulse Travelling in MV Power Cables with Two Inductive Sensors

Yan Li* (Eindhoven University of Technology, Netherlands), Peter A. A. F. Wouters, Paul Wagenaars, Peter C. J. M. Van Der Wielen, E. Fred Steennis

[PF-35] State of the Art of Unconventional PD-measurement at Power Transformers Jürgen Fabian* (Graz University of Technology, Austria), Martin Neuwersch, Christof Sumereder

[PF-36] New Antenna Design for UHF Monitoring of Power Transformers A. Akbari* (K. N. Toosi K. N. Toosi University of Technology, Iran), H. R. Mirzaei, E. Gockenbach, H. Borsi, M. Zanjani,

K. Miralikhani

[PF-37] Attenuation Characteristics of GIS PD UHF Signals Propagating from the Resin Sprue of Metal Ring of the Insulator

Liang Wang* (North China Electric Power University, China), Shu-sheng Zheng, Cheng-rong Li

[PF-38] Assessment of Moisture in Paper Oil Insulation by Frequency Domain Spectroscopy and Polarization Depolarization Current Method

J. Sundara Rajan* (Central Power Reserch Institute, India), A. Ravi Kumar

[PF-39] Physical Representation of a Transformer Winding by a Coupled Ladder Network Constructed From its Measured Frequency Response

Saurav Pramanik* (Indian Institute of Science, India), L. SATISH

[PF-40] An Experience of DGA Monitoring on Power Transformers W. G. Ariastina* (Udayana University, Indonesia), I N. Setiawan, I. A. D. Giriantari, R. P. Sari, I. K. Solin

[PF-41] Surface Partial Discharge Fuzzy Diagnosis in Oil-paper Insulation Based on Dissolved Gas-in-oil Analysis Bo. Xie* (State Key Laboratory of Power Transmission Equipment and System Security and New Technology, China),

Weigen. Chen

[PF-42] Construction and Evaluation of Prototype Online PD Monitoring and Diagnosis System in High Voltage Electric Equipment

Yuki Tai* (Kyushu Institute of Technology, Japan), Masahiro Kozako, Masayuki Hikita, Itaru Nakamura, Naohiro amamura, Asuka Suizu

[PF-43] Use of MV Current Transformers as Sensors for High Impedance Fault Detection B.T. Phung* (University of New South Wales, Australia), J.C. Chen, D.M. Zhang, T.R. Blackburn, E. Ambikairajah

[PF-44] Methodology for Decomposition of Leakage Current in Metal Oxide Surge Arresters E. G. Costa* (Federal University of Campina Grande - UFCG, Brazil), V. S. Brito, G. R. S. Lira

[PF-45] Monitoring of Polarization and Depolarization Current (PDC) Measurement and Analysis by User-friendly Panel

N. F. Kasri* (Institute Of High Voltage And High Current (IVAT), Malaysia), R. A. Zainir, N. A. Muhamad, N. A. M. amail, B. T. Phung

[PF-46] Application of New Visualization Equipment to Identify the Source Position of the Discharge-Emitted Electromagnetic Waves to Three-Phase Apparatus

R. Fuchi* (Kyushu Institute of Technology, Japan), H. Shibata, T. Umegane, Shinya Ohtsuka, A. Izena, H. Fukuda

[PF-47] External Diagnosis of SF6 High Voltage Selfblast Circuit Breaker Nozzles S. Wetzeler* (Institute for High Voltage Technology, Germany), M. Hoffacker, L. Hulka, P. G. Nikolic, A. Schnettler, Cora Petino

[PF-48] Measurements and Modelling of Dielectric Response of Oil-impregnated Paper Insulation Based on Cole-cole Theory

M. Dong* (Xi’an Jiaotong University, China), J.Z. Li, R. Liu, W. X. Zhou, Y. Liu

[PF-49] A Comparison between Simulation Results and Experiment for Partial Discharge UHF Signal Propagation in Power Transformers

A. Akbari* (K. N. Toosi K. N. Toosi University of Technology, Iran), M. Zanjani, H. R. Mirzaei, E. Gockenbach, H.Borsi

[PF-50] The Study of On-line Spectroscopic Monitoring of SF6 Decomposition Product M. Dong* (Xi’an Jiaotong University, China), Y.B. Yang, Z.Q He, M.R. Zhang, M. Ren

[PF-51] Sensitivity of Life Data Analysis for Populations Characterized by Small Amount of Failure Data L.A. Chmura* (Delft University of Technology, Netherlands), P.H.F. Morhuis, R. Kochetov, T. Andritsch, J.J. Smit, A.L.J. Janssen

[PF-52] Study on Establishment of VLF Tan-delta Criterion for Rejuvenated Cables Yeon-Ha Jung* (KEPCO, Republic of Korea), Young-Soo Jeon, Jang-Seob Lim, Tae-Wan Kim

SESSION OG1: Asset Management 1


[OG1-01] Development of Maintenance Strategy Evaluation Program by Considering Distribution of Service Age T. Takahashi* (Central Research Institute of Electric Power Industry (CRIEPI), Japan), T. Kuraishi, T. Okamoto

[OG1-02] Asset Management: Power Transformer Fleet Condition Assessment and Risk Management T. McGrail* (Doble/WPI, USA), K. Elkinson

[OG1-03] Numerical and Experimental Investigation of the Temperature Distribution inside Oil-cooled Transformer Windings

N. Schmidt* (University of Stuttgart, Germany), S. Tenbohlen, S. Chen, C. Breuer

[OG1-04] Live, On-Site Accuracy Verification of Instrument Transformers in Italy: New Methodologies, Equipment and Perspectives

G. Mazza* (RSE, Italy), G. Pirovano, C. Cherbaucich, G. De Donà, D. Bosonetto, C. D. Milanello, G. Gamba, M. Franchi

[OG1-05] Renovation Criteria for Replacement of High Voltage Circuit Breaker in Transmission Network Cattareeya Suwanasri* (King Mongkut’s University of Technology North Bangkok, Thailand), Sarawut Wattanawongpitak,

Thanapong Suwanasri

[OG1-06] Investigation of the Correlations between Diagnostic Parameters and Failure Probability for Transformers B. S. He* (Xi'an Jiaotong University, China), W. Shen, W. Cao, K. Wu

SESSION OG2: Asset Management 2


[OG2-01] Investigation into the Feasibility of Modified Woodpole Distribution Structures to Reduce their Pole-top fire Risk M.D. Ntshani* (University of the Witwatersrand, South Africa), K.V. Thejane, H.J. Geldenhuys, T.D. Mvayo, R. Watson,

W.L. Vosloo, A. Khatri, B.W. McLaren, A.A. Beutel, J.M. Van Coller

[OG2-02] Switching Overvoltages and Safety of Live Work on EHV Overhead Lines S.V. Kazakova* (Novosibirsk State Technical University, Russian Federation)

[OG2-03] Practical Experience for Replacing and Retrofitting of Obsolete On-load Tap Change for Decreasing System Average Interruption Duration Index (Saidi)

S. Tantipattarakul* (Electricity Generating Authority of Thailand, Thailand)

[OG2-04] On-site Calibration of 20 kV Voltage Testing and Monitoring Systems in Intelligent Supply Networks (Smart Grids) Markus Puetter* (Omicron, Austria), Christian Enk, Inho Hong

[OG2-05] Modelling the Short-circuit Reliability of Ageing Power Transformers Z.D. Wang* (The University of Manchester, UK), B. Patel, J.V. Milanovic, P. Jarman

SESSION PG: High Voltage Systems Aspects: Asset Management, Smart Grids, Live Line Working, Maintenance and On-site Repair


[PG-01] Establishment of Health Index for Service Aged Power Cables Using Statistical Analysis Jangseob Lim* (Mokpo National Maritime University, Republic of Korea), Taewan Kim, Donghyeong Lee, Yonghyun Kim,

Narae Park, Yoenha Jung, Sungmin Kim, Beongsuk Kim

TOPIC GHigh Voltage Systems Aspects: Asset Management, Smart Grids, Live Line Working, Maintenance and On-site Repair

[PG-02] Practice of Microgrid Control System ZhiHai Tan* (Beijing Sifang Automation Co.,LTD, China), Liang Ge, XiaoPeng Ji, Lei Weng, Yun Liu

[PG-03] Investigation of Feeder Self-healing Control ZhiHai Tan* (Beijing Sifang Automation Co.,LTD., China), Liang Ge, FengQing Zhao, Lei Weng, Qiang Jin

[PG-04] Development of 400kV High Stress Cable System Kwangmo Kim* (LS Cable & System Ltd., Republic of Korea), Kwanghun Kim, Jaehong Lee, Hunjoo Kwak, Kyoungro Ko, Inho Lee

[PG-05] A Study on the Large-scale Battery Energy Storage for Renewables Integration Byunghoon Chang* (Korea Electric Power Corporation, Republic of Korea), Sungsik Shin, Hyungyu Han, Chulwoo Kim,

Woongjae Jeon

[PG-06] Development of 345kV Gas Insulated Transmission Line Wan-ki Park* (LS Cable & System Ltd., Republic of Korea), Sung-ik Sim, Soo-bong Lee, Sang-taek Park, Jung-nyun Kim

[PG-07] Impact of Placement of Atmospheric Data Measurements on Dynamic Line Rating Results M. Maksic* (Elektroinstitut Milan Vidmar, Slovenia), G. Lakota, J. Kosmac, U. Salobir, J. Kostevc

[PG-08] Possible Reasons of Transmission Line Unexplained Outages A. Ovsyannikov* (JSK Elektrosetservice, Russian Federation), V. Borovitsky

[PG-09] Use of Insulating Synthetic Single Filament Lines in Online Interventions Alexandre Gomes* (Hydroelectric Company of São Francisco, Brazil), Edson Costa, Tarso Ferreira

[PG-10] Consideration of Acquisition Cost in Life Cycle Cost of High Voltage SF6 Insulated Substations E. Gockenbach* (Leibniz Universität Hannover, Germany), J. Zheng, X. Zhang, M. Kuhnke, F. X. Yuan, Y. M. You, X. Y. Zhao

[PG-11] A Study on the Development of Power Converter for 6.6kV, 30kVA, Single-phase Solid-state Transformer Using Microprocessor

Ahn Joon Seon* (Osan College, Republic Of Korea), Joo Hyeong Gil, Seo Myeong Seok, Kim, Ju Yong

SESSION OH1: HVDC Equipment


[OH1-01] Partial Discharge Measurement on Gas-insulated HVDC Equipment U. Schichler* (SIEMENS, Germany), M. Kuschel, J. Gorablenkow

[OH1-02] Dimensioning of DC Composite Insulators for Polluted Area: Case Study for Recent Cigre/Iec Approach Igor Gutman* (STRI, Sweden), Wallace Vosloo, Jens Seifert

[OH1-03] The Impact of HVDC System Monopolar Operation on UHVAC Transformer DC Neutral Currents Anfeng Jiang* (Ministry of Education, China), Lian Duan, Chengyun Gu, Liming Wang, Zhengcai Fu

[OH1-04] HVDC Corona - Experimental Setup and Measurements A. G. Swanson* (University of the Witwatersrand, South Africa), M.D. Grant, I. R. Jandrell, I. Hofsajer

[OH1-05] Switching Impulse Test of Large Sphere-Plane Air-Gaps with Protrusion on Large Spheres Dong Wu* (ABB HVDC, Sweden), Liliana Arevalo, Ming Li, Mats Larsson

[OH1-06] Study of the Interruption Characteristics in a 500kV SF6 DC Transfer Switch Coupled with MHD Arc Modelling Xingwen Li* (Xi’an Jiaotong University, China), Kai Zhu, Xu Jiang, Shenli Jia, Jingwei Mu

SESSION PH: HVDC Technologies and Applications


[PH-01] Derivation of Requirements for Small-Current Switching in Future HVDC Substations Andreas Ritter* (ETH Zurich, Switzerland), Michael M. Walter, Ulrich Straumann, Christian M. Franck

[PH-02] Surface Charging Characteristics on Solid Dielectrics under Various Surface Conductivity in HVDC GIS Spacer

K. Kato* (Niihama National College of Technology, Japan), N. Hayakawa, H. Okubo

[PH-03] Development of the HVDC ±80kV XLPE Cable System and Construction of Test-bed in Korea T. H. Lee* (LS Cable & System Ltd., Republic of Korea), J.W. Choi, S. B. Lee. E. H. Jung, J.H. Nam, J.N. Kim, I.H. Lee, S.I. Jeon,

D.H. Kim, H.S. Park, J.W. Kang

[PH-04] FE-IFE Coupling Method for 3-D Current Field Computation Huazhu Du* (Wuhan University, China), Xishan Wen, YunZhu An, Zhipeng Jiang, Wei Fan

[PH-05] Investigation of the Frequency Dependency of Phase Angle Error in a Zero-flux Current Measuring System M. Hammarqvist* (SP Swedish Technical Research Institute, Sweden), A. Elg, A. Bergman, J. Blennow, S. M. Gubanski

[PH-06] HVDC Corona - Analysis of Corona through Modelling Techniques A. G. Swanson* (University of the Witwatersrand, South Africa), M.D. Grant, I. R. Jandrell

[PH-07] Calculation of Ion Flow Field for ±500kV Bipolar HVDC Test Transmission Lines Young-hong Kim* (KEPCO Research Institute, Republic of Korea), Jae-seop Lim, Koo-yong Shin, Kwang-ho Yang,

Byeong-yoon Lee, Dong-hee Kim

[PH-08] Full-Scale Electrical Environment Test Results with a Carbon Fiber Composite Conductor (ACCC) in the ±500kV Bipolar 1-Circuit Gochang Test Yard

Jae-seop Lim* (KEPCO Research Institute, Republic of Korea), Young-hong Kim, Hee-won Noh, Koo-yong Shin, Mun-no Ju, Kwang-ho Yang

TOPIC HHVDC Technologies and Applications

[PH-09] Current Balancer for Interleaved Three-phase Voltage Source Grid-connected Inverters J.P. Lee* (Korea Electrotechnology Research Institute (KERI), Republic of Korea), D.S.Shin, K.J.Lee, D.W.Yoo, D.S.Kang,

K.Y.Park

[PH-10] Experiment on DC Circuit Breaker by Improved Magnetic Arc-Extinguisher Circuit T. J. Kim* (Korea Electrotechnology Research Institute (KERI), Republic of Korea), J.W.Baek, M.H.Ryu, D.W.Yoo

[PH-11] Design and Performance of a Wideband 1000 kV HVDC Modular Reference Divider J. Hällström* (MIKES, Finland), A. Bergman, S. Dedeoğlu, A-P. Elg, E. Houtzager, J.V. Klüss, T. Lehtonen, W. Lucas, A. erev,

J. Meisner, E.-P. Suomalainen, C. Weber

[PH-12] Advanced Technology for Reliable HVDC Extruded Cable System Yukihiro Yagi* (VISCAS Corporation, Japan), Hiroshi Niinobe, Hiroyuki Kon, Hideo Tanaka, Akitoshi Watanabe, Takenori

Nakajima

[PH-13] Application of Modular Multilevel-Converter Stations for Supporting Fault-clearance in HVDC-Systems C. Petino* (RWTH Aachen University, Germany), M. B. Karacay, D. Eichhoff, A. Schnettler

[PH-14] Thermal Performance of Stop Joint Box for 80kV HVDC Superconducting Cable Kideok Sim* (Korea Electrotechnology Research Institute(KERI), Republic of Korea), Jeowook Cho, Dongsik Kang

[PH-15] Research on Arrester Configuration Scheme for ±1100kV UHDC Converter Station Yuelong Pang * (Shandong University, China), Changyun Li, Qingmin Li, Xiaoguang Wei, Gaoyong Wang

[PH-16] High Voltage Poling of Dye-doped Polymer Film for Electro-optic Waveguide Devices Daming Zhang* (Jilin Uinversity, China), Fei Wang, Zijian Cao, Xiaoqiang Sun

[PH-17] Optimization of the Frequency Response of a 1000 kV Shielded HVDC Reference Divider Alf-Peter Elg* (SP Technical Research Institute of Sweden, Sweden), Anders Bergman, Jari Hällström, Ilkka Iisakka, Tapio

Lehtonen

AN EXPERIENCE OF DGA MONITORING ON POWER TRANSFORMERS

W. G. Ariastina1*, I N. Setiawan1, I. A. D. Giriantari1, R. P. Sari2 and I. K. Solin3 1Department of Electrical Engineering, Udayana University, Bali-80362, Indonesia

2PT PLN (Persero) Surabaya Maintenance Service Area, Sidoarjo-61257, Indonesia 3PT PLN (Persero) Head Office, Jakarta-12160, Indonesia

*Email: [email protected] Abstract: This paper presents DGA test results of three similar types of power transformers with different operation commencing dates. The first transformer is comparatively new transformer with five years servicing the network. This apparatus has a high vibration and noise. The second transformer has been operated for about ten years, while the third represents a seventeen year in service equipment. A series of DGA tests for the transformers have been carried out over five year period. Results from several DGA interpretation techniques then are compared to look possible fault existence. It has been shown that in addition to analysis of an individual gas concentration, the trends of gas concentration and gas proportion over time, have been very useful in assisting researchers and engineers in monitoring condition of the power transformers.

1 INTRODUCTION

DGA has been well known since decades and currently is the most extensively used test for transformer condition monitoring. For a DGA test, a small amount of transformer oil is taken from transformer tank. The oil sample must be completely sealed to prevent gas escaping from the sample vessel or further moisture ingress into the oil. Hydrocarbon gases dissolved in the oil are then extracted and analysed by means of a gas chromatograph.

The presence and the quantity of the gases determine the quality of the insulating liquid and the existence of failures within the transformer tank. There are several gases that can be used as indicators, which include carbon monoxide (CO), carbon dioxide (CO2), hydrogen (H2), methane (CH4), ethane (C2H6), ethylene (C2H4), and acetylene (C2H2). A corresponding oil quality test is usually carried out to identify the insulation integrity level of the oil. The later basically covers examination of physical characteristics, which include breakdown test, viscosity, flash point, water content and acidity level.

Since it was firstly developed, research into DGA interpretation has been extensively carried out. A large number of technical papers have been published accordingly. A number of well known DGA interpretation techniques have also been developed. Among the available techniques are the key gas interpretation, IEC methods, Roger’s ratio, Doernenburg’s ratio, and Duval’s triangle fault indicator [1-7].

Many other techniques have also been developed to increase the interpretation accuracy. Several approaches applied modified single method and the other applied a combined interpretation

technique. DGA interpretation techniques with artificial intelligent tools have also been introduced recently [4-6].

In addition to the absolute value and ratios of dissolved gases, it is important to consider the increase rate of a particular gas over time. Continuous tests that provide trends of the dissolved gas quantity will be very useful in providing an accurate interpretation of the DGA results. A sudden increase in distinctive gas content may specify a fault occurrence [4,7].

This paper presents a field experience of DGA monitoring of three 150/20kV power transformers. The first transformer is a five year in service equipment with high vibration and noise. The second has been operated for about ten years, while the third represents a seventeen years in service transformer. Results from several DGA interpretation techniques then are compared to look possible fault existence. Figure 1 illustrates one of the investigated power transformer (Transformer 1).

Figure 1: Transformer 1 (150/20kV, 60MVA)

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2136

2 DGA MONITORING

As part of asset management strategy, the state electricity company of the Republic of Indonesia, has implemented DGA as a standard method for condition monitoring of HV transformers. The time interval of the DGA monitoring is determined based on the condition of the equipment. The DGA has been applied as a standard method, since it is efficient to determine and classify the thermal and electrical faults.

In addition to the DGA monitoring, condition monitoring of transformer using electrical, mechanical and thermal methods have also been applied. The later include Partial Discharge (PD), Frequency Response Analysis (FRA), Acoustic Emission (AE), vibration analysis and infrared thermography techniques.

DGA test results of three different transformers of similar type and capacity are discussed in this paper. The first transformer has been operated for five years with high vibration and noise. The second has operated for about ten years with thermal fault indication, while the third represents a seventeen years in service transformer.

The DGA tests have been carried out for five years in series. The time interval between measurements is approximately a year. Interpretation techniques of the DGA test results presented here are of key gas method, Doernenburg’s ratio, IEC ratio and Duval’s triangle. In addition to the diagnosis using these interpretation methods, the trends of individual concentration and composition of the hydrocarbon gases are also presented. The trend of gas quantity may provide a useful fault indication within the transformer.

The sample for DGA tests was of bottom oil of the main tank. The oil was taken from bottom drain valve of the transformer (see yellow arrow sign in Figure 1). The oil sample was obtained during normal operation of the transformers, with an approximate temperature of 60°C.

3 RESULTS AND DISCUSSION

3.1 Transformer 1 (5 years in service)

The power transformer was manufactured in 2007, and commenced to operate in early 2008. It is an ONAN/ONAF type with a capacity of 60MVA. The equipment is installed within a network substation, with an operating voltage of 150/20kV. The cooling fan is set to operate at an oil temperature of 60°C and above. Previous measurement showed that the transformer produced a vibration acceleration of 311.27m/s2, the highest among other tested power transformers in the region [8]. As a result of the high vibration, the transformer also produces a high audible noise.

The maximum transformer loading during first year of operation was slightly above 15MW. It has been 100% increased of load since the time. Figure 2 shows typical daily load pattern of the transformer. The transformer is currently operated with a low loading scheme, mostly below 50% of its maximum capacity. During day time, the load is comparatively steady of about 21MW. Beginning about 5pm, the load increases to meet night peak demand. The maximum transformer loading is about 32MW and lasts for a few hours before decreases because of less power demand later at night. The recorded maximum oil temperature is about 65°C.

0

5

10

15

20

25

30

35

8:00 9:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00 20:00 21:00 22:00

Time

Load

(MW

)

Figure 2: Typical load pattern of Transformer 1

Individual gas concentration in oil for Transformer 1 over the time period is illustrated in Figure 3. There was an increase in concentration of carbon dioxide, carbon monoxide, hydrogen, methane, and ethane during first year operation of the transformer. The concentrations of these gases were comparably high, with carbon dioxide of 2714.29 ppm, carbon monoxide of 755.93 ppm, hydrogen of 281.45 ppm and the ethane of 192.48 ppm. Over the following three years however, the concentrations of the hydrocarbon gases have decreased gradually.

0

500

1,000

1,500

2,000

2,500

3,000

2008 2009 2010 2011 2012

Year

Gas

Con

cent

ratio

n (p

pm)

CO2 CO H2 CH4 C2H6 C2H4 C2H2

Figure 3: Trend of individual gas concentration of Transformer 1

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2137

The key gas chart in Figure 4 shows that the proportion of carbon monoxide and hydrogen has decreased over time period. In contrast, the proportion of methane and ethane was constantly increased. This indicates that during early operation of the transformer, there is a possibility of occurrence of low energy discharges that produces hydrogen, and slightly methane, ethane and ethylene. This approach has also indicated an occurrence of cellulose decomposition for the following years. However; after five years in service the key gas interpretation suggested no fault and the transformer has been classified into normal operation (see Table 1).

0

20

40

60

80

100

CO H2 CH4 C2H6 C2H4 C2H2

Gas

Com

posi

tion

(%)

2008 2009 2010 2011 2012

Figure 4: Trend of hydrocarbon gas composition of Transformer 1

DGA interpretation using Doernenburg’s ratio has shown different results from year to year. There was an indication of low energy discharge in 2008 and thermal fault in 2011. In contrast, no fault indication was given by IEC ratio for five years in service. Similarly, Duval’s triangle approach provided no results. This is due to a low monthly increase rate of the hydrocarbon gases. Details of the DGA interpretations are shown in Table 1.

Table 1: DGA interpretations of Transformer 1

Year Technique

2008 2009 2010 2011 2012

Key Gas Low

energy Discharge

Cellulose decomposition



Normal

Doernenburg Ratio

Low energy

Discharge

High energy

discharge N/A Thermal

fault N/A

IEC Ratio Normal Normal Normal Normal Normal Duval’s Triangle N/A N/A N/A N/A N/A

The formation of comparably high carbon oxides and hydrogen during first year of transformer operation may relate to an early stage oxidation of the transformer oil. These gases may be generated

not only as a result of faults within the equipment but also because of rusting process or other chemical reactions involving steel, uncoated surfaces or protective paints [7]. The amount of the produced gasses is very dependent on the characteristics of the oil, cellulose materials and other metallic components within the transformer.

This condition is signified by the reduction in hydrocarbon gas concentrations for the following years, which may indicate that the chemical reaction is reaching a new equilibrium point. The increase of methane and ethane proportion between year 2011 and 2012 however, has been a concern for further investigation. The transformer is currently continued in normal service.


The second transformer has a similar type of Transformer 1. This apparatus has been in service for about ten years. The maximum transformer loading is about 14 MW. No failure was previously occurred during operation of the transformer. Oil degassing process or reclamation has also never been carried out.

Individual gas concentration in oil for the last five years of Transformer 2 is presented in Figure 5. It can be seen that there was a consistence increase in concentration of carbon dioxide, methane, ethane and ethylene for the last four years. In 2008, a high concentration of ethane was recorded. The gas concentration suddenly decreased on the following year, before beginning to gradually increase again. In 2009, there was an abrupt increase in methane concentration and occurred only in single year.

0

200

400

600

800

1,000

1,200

2008 2009 2010 2011 2012

Year

Gas

Con

cent

ratio

n (p

pm)



The key gas analysis shows that the proportion of hydrogen was gradually decreased over the five year period, as illustrated in Figure 6. In contrary, ethane was present at a very high proportion in year 2008. A high increase in methane was also noticeable in year 2009. A relatively small increase

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in acetylene proportion was noticed in 2010. For the last three years, the proportion of the key gases was dominated by carbon monoxide. Note also that in year 2012, the proportion of ethylene was increased significantly from the previous year. The summary of DGA interpretation using key gas and other techniques over the last five years is presented in Table 2.

0

20

40

60

80

100


Gas

Com

posi

tion

(%)

2008 2009 2010 2011 2012


Interpretation using Doernenburg’s ratio for the last four years indicated fault occurrence involving high energy discharge and thermal fault. Particularly in year 2012, similar diagnosis was also indicated by IEC ratio and Duval’s triangle approaches. Quite similar interpretation results were also observed in year 2009, however with a PD indication by Duval’s triangle technique. In other years of observation, results of the DGA interpretation techniques varied, thus it is difficult to provide a conclusive interpretation.


Year Approach

2008 2009 2010 2011 2012

Key Gas Normal Normal Normal Cellulose decomposition

Normal

Doernenburg Ratio N/A Thermal

fault High

energy discharge

Thermal fault

Thermal fault

IEC Ratio Normal Thermal Fault Normal Normal Thermal

fault Duval’s Triangle N/A PD N/A N/A T3

Regular increase in carbon monoxide and other hydrocarbon gasses for the last four years have been a concern for the continuity of the transformer service. DGA interpretations results indicated a possibility of fault occurrence involving high temperature. It has not been decided yet however, whether the transformer will be put into

maintenance. Currently, the transformer is still in service with a low loading scheme and further monitoring has been planned accordingly.


The third transformer has a similar type to those of Transformer 1 and 2. The transformer has the longest period of service among the three. It has been in service for about seventeen years. The maximum daily transformer loading is about 40MW. No short circuit or other failure occurred during operation of the transformer. Oil degassing has not previously been carried out.

Figure 7 shows individual gas concentration in oil over the last five years for Transformer 3. Relatively high concentration of carbon dioxide is clearly observed. Although the concentration of the carbon dioxide gas decreased significantly in 2009 however, the gas concentration has been increased with a high rate during the last three years. The concentration of carbon monoxide was slightly increased during period of 2008 to 2011, before decreased significantly in year 2012. A comparatively small amount of other dissolved gasses was produced during this period.

The key gas approach shows a variation of the dissolved gas proportion from year to year. The hydrocarbon gas compositions were dominated by carbon monoxide, with a proportion well above 70%. A noticeable increase in hydrogen and acetylene was observed in 2012. The trend of hydrocarbon gas composition of Transformer 3 can be seen in Figure 8.

0

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

4,500

5,000

2008 2009 2010 2011 2012

Year

Gas

Con

cent

ratio

n (p

pm)



Although the increase in acetylene was clearly observed in 2012, the interpretation using key gas technique however, showed a normal operation of the transformer. In contrary, interpretations of the DGA test results for four years earlier indicated an occurrence of low energy discharge and a possibility of cellulose decomposition as shown in Table 3.

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0

20

40

60

80

100


Gas

Com

posi

tion

(%)

2008 2009 2010 2011 2012


DGA interpretation using Doernenburg’s ratio technique showed a consistent indication of the occurrence of high energy discharge for the last four years, which was started by an occurrence of low energy discharge in year 2008. In contrary, normal operation was indicated by IEC ratio interpretation technique. Similarly, Duval’s triangle fault indicator has shown no particular results for the five years period.


Year Approach

2008 2009 2010 2011 2012

Key Gas Low

energy discharge




Normal

Doernenburg Ratio

Low energy

discharge

High energy

discharge

High energy

discharge

High energy

discharge

High energy

discharge IEC Ratio Normal Normal Normal Normal Normal Duval’s Triangle N/A N/A N/A N/A N/A

Although the concentration and the increase rate of the hydrocarbon gasses are within their suggested limits, constant increase in carbon dioxide over the past four years has been focused for further investigation. This may be an indication of fault occurrence involving cellulose materials [7]. The equipment is currently kept servicing the network.

4 CONCLUSIONS

Investigation of DGA test results on power transformers has been carried out. Different test results from three transformers with different case and duration of service have been presented. In addition to the analysis of an individual gas concentration, the trends of dissolved gas concentration and proportion over time have been very useful in assisting researchers and engineers in monitoring condition of the power transformers.

DGA interpretation using several techniques showed variation in diagnosis results. This may lead to a difficulty in deriving comprehensive interpretation of DGA test results. Condition examination using combination of DGA with several other monitoring techniques, such as PD technique, furanic compound analysis, and FRA has been planned for future investigations.

5 ACKNOWLEDGMENTS

The authors greatly appreciate PT PLN (Persero) Transmission and Load Dispatch Centre for providing access to the investigated power transformers. The authors would also like to extend their appreciation to Udayana University for providing partial funding for the study.

6 REFERENCES

[1] S. Singh and M. N. Bandyopadhyay, “Dissolved Gas Analysis Technique for Incipient Fault Diagnosis in Power Transformers: A Bibliographic Survey”, IEEE EI Magazine, Vol. 26, No. 6, pp. 41-46, Nov/Dec 2010.

[2] S. Besner, J. Jalbert and B. Noirhomme, “Unusual Ethylene Production of In-Service Transformer Oil at Low Temperature”, IEEE Trans. DEI, Vol. 19, No. 6, pp. 1901-1907, Dec 2012.

[3] I. Höhlein-Atanasova, R. Frotscher, “Carbon Oxides in the Interpretation of Dissolved Gas Analysis in Transformers and Tap Changers”, IEEE EI Magazine, Vol. 26, No. 6, pp. 22-26, Nov/Dec 2010.

[4] M. Duval, “Calculation of DGA Limit Values and Sampling Intervals in Transformers in Service”, IEEE EI Magazine, Vol. 24, No. 5, pp. 7-13, Sep/Oct 2008.

[5] M. Arshad and S. M. Islam, “Significance of Cellulose Power Transformer Condition Assessment”, IEEE Trans. DEI, Vol. 18, No. 5, pp. 1591-1598, Oct 2011.

[6] A. Akbari, A. Setayeshmehr, H. Borsi, and E. Gockenbach, I. Fofana, “Intelligent Agent-Based System Using Dissolved Gas Analysis to Detect Incipient Faults in Power Transformers”, IEEE EI Magazine, Vol. 26, No. 6, pp. 27-40, Nov/Dec 2010.

[7] IEC Publication 60599, “Mineral Oil-Impregnated Electrical Equipment in Service – Guide to the Interpretation of Dissolved and Free Gases Analysis”, Mar 1999.

[8] W. G. Ariastina, I. A. D. Giriantari, I. K. Solin and O. Yolanda, “Condition Monitoring of Power Transformer: A Field Experience”, Proc. of the 9th ICPADM, Harbin, Vol. 3, pp. 1051-1054, Jul 2009.

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