cape town, southafrica 24-28 august2009 - gbv · 2012-08-19 · two specialist reviewers, ......

PROCEEDINGS OF THE 16TH INTERNATIONAL

SYMPOSIUM ON HIGH VOLTAGE ENGINEERING

CAPE TOWN, SOUTH AFRICA

24-28 AUGUST 2009

Editors:

Kenneth John Nixon

Jan Peter Reynders

Review: Based on a review of the extended abstracts by the scientific committee, selected authors were

invited to submit full papers limited to six pages. Each full paper was then peer reviewed by at least

two specialist reviewers, with final acceptance based on the value of the contribution and its scientific

and engineering merit.

Disclaimer: The 16th International Symposium on High Voltage Engineering, Sponsors, Hosts and Pub¬

lishers accept no responsibility for errors or omissions in the abstracts. The 16th International Symposiumon High Voltage Engineering, Sponsors, Hosts and Publishers shall not be liable for any damage caused

by errors or omissions in the abstracts.

All rights reserved.

This publication may not be reproduced in whole or in part, stored in a retrieval system or trans¬

mitted in any form or by any means without permission from the publisher.

Published and distributed by the South African Institute of Electrical Engineers (SAIEE).Tel: +27 11 487 3003

Fax: +27 11 487 3002

ISBN 978-0-620-44585-6

© 2009 South African Institute of Electrical Engineers.Printed in the Republic of South Africa.

Cover photograph oflightning around Table Mountain, Cape Town © Glenn Kasner ([email protected]).Used with permission.

Table of Contents

Programme Overview i

Table of Contents iii

Topic K: Invited Paper 1

Monday 24 August 2009,11:00-12:30:

Opening Session k. Keynote addresses (Eskom Auditorium - Auditorium II) 2

Paper K-l: Recent lightning research in South Africa with a special focus on keraunopathology

Jandrell, I.R., Blumenthal, R., Anderson, R.B., Trengove, E 2

Topic A: HV Measurements 3

Monday 24 August 2009, 13:30-15:00:

Oral Presentations : HV Measurements-1, Meeting Room 1.41 & 1.42 4

Paper A-l: Terminal based recognition of resonance overvoltages in transformer windingsFlorkowski, M., Fiirgal, J 4

Paper A-2: The negative dissipation factor and the interpretation of the dielectric response of

power transformers

Koch, M., Kriiger, M 5

Paper A-3: Investigation of the effect of a lightning impulse waveform exceeding 600kV on the

dielectric strength of SF6 gas and insulation oil

Koyama, H., Hoshino, T., Hanai, M., Okabe, S., Tsuboi, T., Takami, J 6

Paper A-4: Determination of volume resistivity of polymeric insulators by surface charge decay

Lutz, B., Kindersberger, J 7

Paper A-5: Relationship between overshoot and the base curve for lightning impulse waveform

Matsumoto, S., Nishhnura, N., Kasajima, K., Kawamura, T 8

Tuesday 25 August 2009, 09:00-10:30:


Paper A-6: Application of an integrated electro-optic sensor for measuring very fast transient

overvoltages in GIS

Zeng, R., Wang, B., Yu, Z.Q., Li, H. 9

Paper A-7: Quality control of HVDC extruded cables: Electrical treeing in XLPE under different

voltage stresses

Mauseth, F., Bdstad, E., Ytterstad, M., Hegerberg, R., Sandcrn, B., Jewense, M., Skog, J.E. 10

PaperA-8: Stability ofstep-response parameters ofstandardimpulse voltage divider forlightning

impulse

Miyazaki, S., Goshima, H., Sliinlcai, H., Yashima, M., Wakimoto, T., Ishii, M 11

Paper A-9: Application of the k-factor approach to laboratory tests

Pesavento, G., Gobbo, R 12

PaperA-10: Analysis of full and chopped lightning impulse voltages from transformertests usingthe new k-factor approachPfefler, A., Tenbohlen, S 13

iii

Tuesday 25 August 2009, 13:30-15:00:


Paper A-ll: Partial discharge inception on tangentially stressed boundary surfaces tor insulation

materials of large turbine generatorsWerdelmann, P., Kempe.n, S., Pohlmann, F., Peier, D 14

Paper A-12: Review of important diagnostics parameters for power transformer

Piush, V., Sood, Y.R., Singh, J 15

Paper A-13: Enhanced partial discharge evaluation methods for DC PD measurements using

fully digital PD analysing systems

Rethmeier, K., Kuchler, A., Liebschner, M., Krause, Ch., Kraetge, A., Kriiger, M 16

Paper A-14: Arc shapes observed during the laser-induced breakdown of spark gaps

West, N.W., Jandrell, I.R 17

Paper A-15: Uncertainties in the application of atmospheric and altitude corrections as recom¬

mended in DEC standards

Wu, D., Li, M., Kvarngren, M 18

Tuesday 25 August 2009, 15:30-17:00:


Paper A-16: Design and first experiences with 1 million volt grounded tank resonant test system

for GIL factory testing

Britton, J., Hopkins, M.D., Fitzgerald, P.J 19

Paper A-17: Use ofUV cameras for corona tests in high voltage laboratory

Cardoso, J.A.A., Filho, O.O., Ramaiho de MeJJo, D 20

Paper A-18: Electrical degradation of 15 kV XLPE and EPR cable energized by switching

impulses

Grzybovrski, S., Cao, L., Shrestha, P. 21

Paper A-19: Alternating voltage tests on distribution transformers using static frequency con¬

verters

Moessner, K., Leibfried, T., Gamlin, M 22

Paper A-20: Experimental studies on surface discharge dynamics and decay under different

voltage waveforms and electrode shapes

Tran, T.N., Lewin, P.L., Wilkinson, J.S., Swingler, S.G., Coventry, P.F 23

Thursday 27 August 2009, 13:30-15:00:


Paper A-21: Diagnosis ofpower transformer using Daubechies wavelet to localize inter disc/turn

fault in the windings

Bhoomaiah, A., Krishna, B.J., Ram, S.S.T., Rao, P.V.K., Singh, B.P. 24

Paper A-22: The influence of power quality on electrical tree growth and partial discharge

patternsBahadoorsingh, S., Rowland, S.M 25

Paper A-23: Discussion on insulation levels and dielectric test technology requirement of AC

UHV transmission and transformation equipment in China

Cui, D., Wang, J.S., Wang, Y., Zhang, X.Y. 26

Paper A-24: AC test voltage waveform requirements

Gamlin, M 27

Paper A-25: Electrical tree growth in high voltage insulation containing inorganic nanoflllers

Meledath, J.T., Alapati, S 28

Paper A-26: Transformer test systems based on static frequency converter

Schierig, S., Thiede, A., Huang, Y. 29

Thursday 27 August 2009, 09:00-12:30:

Poster Session : HV Measurements 30

Paper A-27: Dynamic characteristics of breakdown in transformer oil under AC voltage

Abdi, S., Boubakeur, A., Hand, N., Haddad, AM 30

Paper A-28: Comparison of the dielectric response of alumina-epoxy composites with nano- and

conventional sized filler

Andritsch, T., Kochetov, R., Morshuis, P.H.F., Smit, J.J 31

Paper A-29: Core magnetization effects on the frequency response analysis of transformers

Aponte, G., Gonzalez, G, Cadavid, H., Burgos, J.C., PMte, J. 32

iv

Paper A-30: Time-resolved current measurements in pure epoxy resin at DC-voltagesAzer, S., Mertens, T., Rehkopf, S., Peier, D 33

Paper A-31: Partial discharge diagnostics of micro cavities and ITS modelling

Budde, M., Ermel, V., Kurr&t. M 34

Paper A-32: Space charge accumulation under the effects of temperature gradient on solid

dielectric DC cable

Choo, W., Chen, G., Swingler, S.G 35

Paper A-33: Inclined plane test, influence of transformer power

Chrzan, K.L 36

Paper A-34: Measurements of dielectric losses on paper-oil insulation samples of service agedHV power cables

Cichecki, P., Gulski, E., Smit, J. J., Vries, F 37

Paper A-35: Dielectric impedance as a diagnostic tool for MV composite insulators

Da Silva, E., Rowland, S.M 38

Paper A-36: Testing transformer having wide voltage variation

Tiwari, R.K., Mahajan, S.K., Dave, A.K 39

Paper A-37: Design of a medium voltage divider for on-site calibration

Crotti, G., Giordano, D., Sardi, A 40

Paper A-38: The transient fault analysis of a large transformer test bay

Goodwin, R.H., Grobler, E., Britton, J 41

Paper A-39: Determination of ageing of polymeric insulating materials by thermal analysismethods

Haas, A., Kindersberger, J 42

Paper A-40: Influence of external noises on insulation diagnosis oi'GIS when UHF PD detection

method is used

Hikita, M., Nakano, T., Omori, K., Sawada, M.. Ohtsuka, S 43

Paper A-41: Leader discharge development and breakdown criteria under non-uniform electric

field in SF6

Kojima, H., Yoshida, S., Iwa,ta, T, Hayakawa, N., Endo. F., Okubo, H 44

Paper A-42: New diagnostic tools for high voltage bushings

Kriiger. M., Kraetge, A., Koch, M., Rethmeier, K, Putter, M., Hulka, L., Koch, N., Muhr,

M., Surnmereder, C 45

Paper A-43: On-line monitoring of capacitance and dissipation factor of HV bushings

Reumann, A., Liebschner, M., Kiichler, A., Lagens, A., Titze, J 46

Paper A-44: Partial discharge measurements of cryogenic dielectric materials used for high

temperature superconducting transformers

Lee, S.H., Jung, S.Y., Ryu, C, Koo, J., Lee, B.W. 47

Paper A-45: Influence of the number of breakdowns on the transformer oil propertiesBenamar, R., Boubakeur, A., Mokhnache, L 48

Paper A-46: Temporary over-voltage measuring and analysis for insulation conditions of power

equipmentLi, J.M., Hong, Z, Li, Y.L., Liu, Q.L 49

Paper A-47: Assessment of ageing conditions through paper tensile strength analysis ofscrappedtransformers

Liu, Q., Wang, Z.D., Jarman, P., Azis, N., Sampson, W.W., Heywood, R 50

Paper A-48: Development of a checking procedure for frequency characteristics measurement

system at power transformers

Marinescu, A., Dumbrava, I., Stefan, D 51

Paper A-49: A method to obtain frequency response in energized power transformers

Martins, H.J.A., Nova, I.F., Vasques, CM., Carneiro. S 52

Paper A-50: Interaction between test circuit for generation of secondary arcs and short-circuit

test transformer

Martins, H.J.A., Ferreira, C.F., Cerqueira, W., Vasques, CM., Trindade, M.B 53

Paper A-Sl: Partial discharge resistant characteristics of alumina filled polymer nanocomposites

Preetha, P., Thomas, M.J 54

Paper A-52: Investigation on FRA waveform change by measurement parameters

Sano, T., Miyagi, K 55

v

Paper A-53: Frequency domain modelling of high voltage transformers using a nonlinear least

square estimation technique

Mohamcd, R., Lewin, P.L 56

Paper A-54: The study of an effect of coupling inductance in teals transformer for the best

dimension

Nedphograw, S 57

Paper A-55: Influence of test equipment capacitance and residual inductance on waveform front

generated in lightning impulse voltage test

Okabe, S., Tsuboi, T., Takami, J 58

Paper A-56: Study on damages caused by stator bar vibration of HV machines

Pong, X., Jia, Z.D., Quo, S.Q., Wang, L.M., Guan, Z.C., Wang, T.Z., Yang, J 59

Paper A-57: Improved noise suppression by real-time pulse-waveform analysis of PD pulses and

pulse-shaped disturbances

Rethmeier, K., Obralic, A., Kraetge, A., Krtiger, M., Kalkner, W., Plath, R 60

Paper A-58: Real-time remote experiment in high voltage lab

Muhr, M., Sadovk, T., Sadovic, S 61

Paper A-59: Comparing investigation of partial discharge under AC, DC and impulse voltageSun, Z.Q., Zhao, X.F., Li, J.S., Li, Y.M. 62

Paper A-60: Experiences with on-site testing of power transformer - TrafositetestingSzczechowski, J.M., Werle, P. 63

Paper A-61: Development of new specification for transformer oil used during processing &

testing of power transformers at works

Tiwari, R.K., Mahajan, S.K., Varyani, D 64

Topic B: Electromagnetic Fields 65

Monday 24 August 2009, 13:30-15:00:

Oral Presentations : Electromagnetic Fields-1, Meeting Room 1.43 & 1.44 66

Paper B-l: Analysis on common ground electrode shared by two DC transmission systemsZhao, J., He. J.L., Cai, Z.Y. 66

Paper B-2: Ion space charge measurement and simulation

Otto, A.J., Reader, H.C., Pieterse, P.J. 67

Paper B-3: Dimensioning of screening electrodes for extremely high rated direct voltage

Ovsyanko, I., Speck, J., GroBnmnn, S 68

Paper B-4: Design of grading rings for lOOOkV AC composite insulator

Bian, X.M., Wang, L.M., Guan, Z.C., Wang, L., Chen, Y. 69

Paper B-5: Measurement of magnetic and electromagnetic fields in a HV AC/DC conversion

substation

Borsero, M., Crotti, G., Vizio, G.. Zilberti, L 70

Monday 24 August 2009, 15:30-17:00:


Paper B-6: Transient analysis of induced voltages on gas pipelines due to lightning strikes on a

parallel transmission line

Caulker, D., Ahmad, H., Yusaf, S., Osrin, Z 71

Paper B-7: Design of a filter for a SPWM VSI connected to the grid via the delta-winding of a

delta-Y transformer

Chetty, L., Ijumba, N.M 72

Paper B-8: Overvoltages induced on overhead power lines by an indirect lightning return-stroke

M'ziou, N., Mokhnache, L., Boubakeur, A., Rattan, R 73

Paper B-9: Multiconductor modelling and analysis for a 25 kV AC multiple return conductor

and a 2x25 kV AC autotransformer railways systemSwanson, A., Goh, S 74

Paper B-10: A computational method for positive corona inception in the coaxial cylindricalelectrode arrangement in air under variable atmospheric conditions

Mikropoulos, P.N., Zagkanas, V.N. 75

vi

Wednesday 26 August 2009, 11:00-12:30:


Paper B-ll: Electric and magnetic fields in 400kV compact substations

Albano, M., Haddad, A.M.. Griffiths, H., Coventry, P.F 76

Paper B-12: Abnormal audiblenoise and visual discharges at glass cap-and-pin insulators related

to the different properties of cement

Dernfalk, A., Gutman, I., Carlshem, L., Kleveborn, R 77

Paper B-13: Comparative studies of AC and DC corona power losses in an indoor corona cageIjumba, N.M.. Lekganyane, M.J., Britten, A.C 78

Paper B-14: Investigation of wire explosion phenomena in high current fast opening switches

Jadidian, J., Mohseni, H., Karbalaie-Zadeh, M., Jebeli-Javan, M.. Shayegani-Akmal, A.A.,Niayesh, K, Mohseni, H 79

Paper B-15: Automatic calculation of optimized electrode configuration in vacuum interrupterSuzuki, K., K&to, K., Kojima, H., Okubo, H 80

Tuesday 25 August 2009, 09:00-12:30:

Poster Session : Electromagnetic Fields 81

Paper B-16: Dynamics of partial discharge in dielectrics: A computational approachBojovschi, A., Rowe, W.S.T., Wong, K.L 81

Paper B-17: A three dimensional electrical network for oil-paper insulation modeling

Bouaicha, A., Fofana, I. MeghneS, F., Farzaneh, M. 82

Paper B-18: Investigation ofthe transient magnetic field components propagation characteristics

due to partial discharge in XLPE cable

Gharri, A.B.A. Chakrabarty, C.K 83

Paper B-19: A comparison of the performance of on-line transformer monitoring indicators withconventional transformer oil tests

Gradnik, T., Koncan-Gradnik, M., Mulej, M., Cucek, B., Pezdirc, M 84

Paper B-20: Large-scale earthing test facilities at Dinorwig power station

Guo, D., Lathi, D., Harid, N., Griffitlis, H., Haddad, A.M., Ainsley, A 85

Paper B-21: Comparative analysis of the electric field distribution around high voltage fittingsHu, Y., Chiampi, M., Crotti, G., Sardi, A 86

Paper B-22: New technique for DC electric field analysis in gas insulated systems based on electric

charge conduction phenomena

Kato, K.. Kaneko, S., Okabe, S., Okubo, II 87

Paper B-23: Electrostatic field analysis of 1200 kV transformer by boundary clement method

Lalwani, G., Singh, R.K., Gupta, S.K., Kuntia, J.S., Tiwari, R.K 88

Paper B-24: Analysis of magnetic fields under power transmission lines changing direction

Matsumoto, T., Hirata, H., Hiraoka, Y., Isaka, K., Hayashi, N., Tarao, H 89

Paper B-25: Evaluation on stress grading system of MV-cable termination by surface field

measurements and E-field calculations

Ming, L., Papazyan, R., Johansson, K., Svahn, J 90

Paper B-26: On the electrical field performance of an overhead conductor real time monitoringsystem (RETMOS II)

Burger, A.A., Pretorius, P.H., Ferreira, I. 91

Paper B-27: On the application of advanced software in overhead line design

Pretorius, P.H., Burger, A.A., Muftic, D., Mahatho, N. 92

Paper B-28: Immunity of a mobile HV measurement facility to conducted disturbances - Labo¬

ratory and field testingPretorius, P.H., Hubbard, K.R 93

Paper B-29: Rogowski coil parameters verification in wide frequency range

Prochazka, R., Hlavacek, J., Kvasnicka, V., Draxler, K 94

Paper B-30: Partial saturation of current transformers in gas insulated switchgears

Braisch, D., Schichler, U., Schumacher, M., Funk, H.W., Krebs, R. 95

Paper B-31: Twisted pair samples subjected to square voltages: Online measurements of dielec¬

tric properties during partial dischargesSonerud, B., Bengtsson, T., Blennow, J., Gubanski, S.M 96

Paper B-32: Tonal component of the audible noise from UHV-AC transmission lines

Straumaim, U., Fan, J 97

vii

Paper B-33: Influence ofdifferent parameters on sensivity verification for UHF PD measurement

Troegei, A., Riechert, U .- 98

Paper B-34: Aspects of non-uniformity in low-frequency electromagnetic field assessment

Voncina, R., Drnnvsek, T., Barl, B., Zorman, M 99

Paper B-35: Corona audible noise of 110 kV high voltage overhead transmission lines

Egger, H., Draxler, R., Wernegger, H.J.. Mulxr, M., Woschitz, R 100

Topic C: HV Insulation 101

Monday 24 August 2009, 15:30-17:00:

Oral Presentations : HV Insulation-1, Meeting Room 1.41 & 1.42 102

Paper C-l: Growth characteristics of electrical tree in silicone rubber

Du, B.X., Ma, Z.L., Gao, Y. 102

Paper C-2: Application of line surge arresters to a 110 kV overhead line in an area with high

lightning activity

Judendorfer, T., Pack, S., Muhr, M., Ignaz,H., Klingbeil, L 103

Paper C-3: Interaction of oil ducts and solid Insulation in HVDC barrier systems

Liebschncr, M., Kiichlcr, A., Krause, Ch., Heinrich, B., Leu, C, Bciger, F 104

Paper C-4: Impulse testing of a polluted insulator with a DC bias voltage

Shifidi, S.K., Vermeulen. H.J., Holtzhausen, J.R, Pieterse, P.J. 105

Paper C-5: The viability of an air-filled concentric tubular transmission line for HVDC

Holtzhausen, J.P., Vosloo, W.L., Stephen, R 106

Tuesday 25 August 2009, 11:00-12:30:


Paper C-6: Lightning impulse ageing of HV cable insulation

Dao, N.L., Lewin, P.L., Swingler, S.G 107

Paper C-7: Electromagnetic wave propagation characteristics emitted from air PD caused by

simulated PD source in transformer tank model with practical coil

Hikita, M., Morita, A., Kozako, M., Ohtsuka, S 108

Paper C-8: Thermal and electrical ageing of silicone oil

Hosier, I.L., Vaughan, A.S., Swingler, S.G., Moss, G 109

Paper C-9: Insulation properties of vacuum interrupters after short circuit current interruption

Koochack Zadeh, M., Himichsen, V., Ikeda, H., Hikita, M 110

Paper C-10: Links between transformer design and sulphur corrosion

Griffin, P., Lapworth, J., Ryder, S Ill

Thursday 27 August 2009, 09:00-10:30:


Paper C-ll: Design parameter based method ofpartial discharge detection and location in power

transformers

Kumar, A.S., Gupta, R.P., Venkatasami, A., Udayakumar, K 112

Paper C-12: HTV silicone composite insulators for HVDC applications - Long-term experienceswith material and design for 500kV and above

Seifert, J.M., Stefanini, D., Janssen, H 113

Paper C-13: Statistical estimation of the lifetime of solid insulations in consideration of defects

Speck, J.: GroBmmn, S., WeiBenberg, W 114

Paper C-14: Comparative evaluation of breakdown strength of natural esters and mineral oil

Vukovic, D., Tenbohlen, S 115

Paper C-15: Selection and maintenance of an adequate transformer insulation system

Wasserberg, V., Weiie, P. 116

Thursday 27 August 2009, 15:30-17:00:


Paper C-16: A study of the electrical environment below HVDC transmission lines

Govender, D., Ijumba, N.M., Britten, A.C., Sibilant, G.C. 117

Paper C-17: Modelling of fast transients using a high frequency transformer

Koltunowicz, T.L., Bajracharya, G., Djairam, D., Smit, J.J 118

Paper C-18: A proposed failure mechanism of OPGW for the horizontal approaching oflightning

step leader

Martinez, M.C.J., R.amrez, L.M., Smith, G.C.M 119

viii

Paper C-19: Intriguing observation on the breakdown trajectory of large air-gaps under switch¬

ing impulse voltages

Ming, L., Wu, D., Astrom, U., Asplund, G 120

Paper C-20: Graphical model of imperfection identification in instrumental transformers byDGA

Davidenko, 1 121


Poster Session : HV Insulation 122

Paper C-21: An efficient noise rejection method for on-line PD measuring in generators

Akbari, A., AUahbakhshi, M., Jafari, K 122

Paper C-22: Creeping discharges propagation over insulators issued of different materials in

presence of SF6, N2, C02, SF6-N2 and SF6-C02

Coulibaly, M.. Beroual, A., Aitken, O., Girodet, A 123

Paper C-23: Re-evaluation ofphase order transmission lines

Beutel, A.A., Britten, A.C., Motloung, T 124

Paper C-24: Partial discharges and breakdown in SFC at sub-millimetre defects

Bujotzek, M., Seeger, M 125

Paper C-25: SF6 partial discharge detection of GIS using SWNT-UHF fusion sensor

Chang, Y.M., Lee, S., Jung, S., Baifc, S., Lee, J.C 126

Paper C-26: Fundamental characteristics of UHF PD probes and the radiation behaviour of PD

sources in power transformers

Coenen, S., Tenbohlen, S., Strehl, T., Markalous, S 127

Paper C-27: Behaviour of metallic particle contamination in SF6/N2 gas mixtures under the

influence of electric field in a common enclosure gas insulated busduct

Padmavathi, D., Amanmth, J., Kamakshaiah, S 128

Paper C-28: Assessment of dielectric behaviour of SFG/N2 gas mixtures with dielectric coated

enclosure in a 1-phase gas insulated busduct in the presence of metallic particle contamination

Padmavathi, D., Amarnath, J., Kamakshaiah, S 129

Paper C-29: Investigation on correlation between breakdown voltage and diagnostic measuring

results of some in service aged motors

Farahani, M., Gockenbach, E., Borsi, H. 130

Paper C-30: Detection of GHz frequency components of partial discharge in various media

Fernando, S., Bojovschi, A., Wong, K.L., Rowe, W.S.T 131

Paper C-31: Partial micro-discharges and their statistics

Ficker, T 132

Paper C-32: Suspended particles in aged insulating fluids

Fofana, I., Bouaicha, A., Farzaneh, M., Sabau, J 133

Paper C-33: Use of controlled defects as UWB PD sensors calibration and sensitivity check

Garcia-Colon, V.R, 134

Paper C-34: An optimized algorithm for SFe leakage detection

Graber, L., Kudoke, M 135

Paper C-35: Suppression of primary electron number by de-excitation and/or electron attach¬

ment reaction in high pressure nitrogen

Hamano, S., Iwao, T., Yumoto, M 136

Paper C-36: Influence of repetitive surge voltages on the dielectric performance of insulatingmaterials

Hoppe. L., Gockenbach, E., Borsi, H 137

Paper C-37: Sensitivity of UHF coupler and loop electrode with UHF method and their compar¬

ison for detecting partial discharge in GIS

Hoshino, T., Maruyama, S., Sakakibara, T., Ohtsuka, S., Hikita, M., Ueta, G., Okabe, S..

.138

Paper C-38: Flashover performance of 380 kV V-strings with cap and pin type insulators under

lightning and switching impulses

Hhan, S., Ozdemir, A 139

Paper C-39: Dielectric modelling & diagnosis of the oil-paper-insulation system in power trans¬

formers

Jaya, M, LeibMed, T 140

Paper C-40: Dissolved gas analysis of natural ester fluids under electrical and thermal stress

Jovalekic, M., Vukovic, D., Tenbohlen, S 141

ix

Paper C-41: Measurement of decomposed gas density of CF3I-CO2 mixture

Jfasuya, H., Ka.ia.giri, H., Kawamura, Y., Saruhashi, D., Nakamura, Y., Mizoguchi, H..

Yana.hu, S 142

Paper C-42: Comparison of arc control performance depending on configuration of spiral type

VI contacts

Kim, B.C., Park, H.T., Jung, E.H., Oh, I.S., Lim, K.J 143

Paper C-43: Comparison ofmethods forthe dissipation factor measurement atpractical examples

Komhuber, S., Markalous, S., Muhr, M., Strehl, T., Sumereder, C 144

Paper C-44: The remaining water in power transformer insulation after drying

Krause, Ch., Gasser, H.P., Kiriyanthan, K 145

Paper C-45: Influence of humidity on positive impulse flashover along cylindrical insulating

surfaces bridging a short rod-plane gap

Lazaridis, L.A., Mikropoulos, P.N 146

Paper C-46: Development and type test of a HVDC ±250kV MI submarine cable system

Lee, T, Shim, S., Kim, N. Kim, J.N., Aim, M.K., Lee, S.J., Jean, S.I 147

Paper C-47: Streamer initiation and breakdown in vegetable-based biodegradable oils

Tran Duy, G, Lesaint, 0., Nguyen Ngoc, M., Denat, A 148

Paper C-48: Erosion resistance of silicone rubber nanocomposite at low filler loadings

Thomas, M.J., Venkatesulu, B 149

Paper C-49: Aging effects on mixture of thermally upgraded paper and kraft paper in mineral

oil

Yamagata, N., Miyagi, K., Oe, E 150

Paper C-50: Development of 345kV gas insulated transmission line proto-type

Nam, S., Sim, S.I, AM, U.K., Park, S.W., Lee, J.M., Jeon, S.I., K&ng, J.W., Seok, K.H.,

Chang, Y.M 151

Paper C-51: On site experiences with multi-terminal EEC PD measurements and UHF PD

measurements

Pfeffer, A., Coenen, S., Tenhohlen, S., Strehl, T., Markalous, S 152

Paper C-52: Up-rating the electrical capacity of an existing transmission line 275 kV to 400 kV

Rashedin, R., Griffiths, H., Harid, N, Haddad, AM 153

Paper C-53: Influence of ionic impurity on loss factor, permittivity and breakdown voltage of

cellulosic insulation paperSaei Shirazi, MM., Borsi, H., Gockenbach, E 154

Paper C-54: Properties of streamer discharges in silicone oils

Suwarno 155

Paper C-55: Sparkover and surface flashover characteristics of CF3I gas under application of

nanosecond square pulse voltageTakeda, T., Matsuoka, S., Kumada, A., Hidaka, K 156

Paper C-56: Feasibility study of leakage current shunting method on wooden pole

Wong, K.L., Ra,hmat, M.F 157

Paper C-57: Study on the evolvement of partial discharge in oil wedge on oil-impregnated

pressboard insulation

Cheung, Y., Li, C, Mi&o, Y. 158

Paper C-58: Comparison with electric characteristics of environmental-friendly oil with temper¬ature increase

Yastida, K., Ishikawa, T., Ar&zoe, S 159

Paper C-59: Behaviour of surface flashover depending on shape and gap distance of end shield

in vacuum interrupterYoon, J.H., Lee, S.S., Heo, J., Lim, K.J., Rang, S.H 160

Paper C-60: Comparative tracking performance of insulation samples within low pressure envi¬

ronments

Zhang, L., Cotton, I. 161

x

Topic D: Diagnostics 163

Tuesday 25 August 2009, 13:30-15:00:

Oral Presentations : Diagnostics-1, Meeting Room 1.41 & 1.42 164

Paper D-l: Impact of duty cycle on wire to plane partial discharge under conditions of square

wave voltage energisation

Alrumayan, F., Cotton, I. 164

Paper D-2: Statistical analysis of transmission power cables condition data

Cichecki, P., Gulski, E., Smit, J.J., Jongen, R.A 165

Paper D-3: Development and demonstration of low cost robust leakage current sensors for

evaluating contaminated insulators

Phillips, A.J., Bologna, F.F., Major, J.M., Engelbrecht, C.S 166

Paper D-4: Non-destructive and in-situ analysis of cellulose insulating materials in power trans¬

formers

Baird, P.J., Ding, H., Herman, II., Mortimore, W., Ryder, S., Stevens, G.C 167

Paper D-5: Influences of parasitic effects on online calibration of partial discharge measurements

Seifert, S., Kessler, O., Plath, R., Emanuel, H., Boschet, V 168

Tuesday 25 August 2009, 15:30-17:00:

Oral Presentations: Diagnostics-2, Meeting Room 1.43 & 1.44 169

Paper D-6: Recognition of partial discharge signals detected by ultra-high-frequency Hilbert

fractal antenna

Cheng, C.K., Li, J., Jiang, T.Y., Wang, Y.Y., Du, L 169

Paper D-7: Insulation characteristics ofmicro size defects inner epoxy

Miyashita, M., Nishida, C, KameL M., Ueta, G., Kancko, S., Okabe, S 170

Paper D-8: A comparative study of PD frequency spectra of typical artificial defects

Nyamupangedengu. C, Jandrell, I.R., Reynders, J.P. 171

Paper D-9: PD diagnostics on GIS using UHF and acoustic method

Schichler, U.. Reuter, M., Gorablenkow, J 172

Paper D-10: Design of ultra high frequency sensors to detect partial discharge in transformers

Sinaga, H.H., Phung, B.T., Blackburn, T.R. 173



Paper D-ll: Detail analysis of particle-initiated partial discharges in SFq gas for condition

monitoring of GIS

Asai, M., Nishizawa, K., Hayalcawa, N., Endo, F., Yoshida. M., Uchida, K., Okubo, H 174

Paper D-12: Polarization and depolarization current (PDC) tests for biodegradable and mineral

transformer insulation oils

Muhamad, N.A., Phung, B.T., Blackburn, T.R. 175

Paper D-13: Development ofa set-up for the evaluation of advanced partial discharge measuringinstruments

Hu, Y., Chiampi, M., Crotti, G., Sardi, A 176

Paper D-14: Partial discharge identification using pulses sequence analysis and neural network

Mirzaei, H.R.., Akbari, A., Allahbakhshi, M 177

Paper D-15: A new method to predict the electrical tree growth in solid insulation

El-Zein, A., Talaat, M., El Bahy, MM 178

Paper D-16: Condition assessment ofpower transformers OLTC byDGA and dynamic resistance

measurements

Zuijderduin, R.., Erbrink, J., Gulski, E., Smit, J.J., Leich, R. 179



Paper D-17: PD characteristics and defect patterns in three phase power cablesHio Nam, J.O., Blackburn, T.R., Phung, B.T 180

Paper D-18: A study on PD location in oil-filled transformer using Sagnac interferometry sensingsystem

Lee, J.H., Kim, M., Song, M., Lee, J.K 181

Paper D-19: Ageing of OIP bushing insulation at very high temperatures

•Reumann, A., Bohm, K., Ktichle.r, A., Langens, A., Titze, J 182

xi

Paper D-20: Technical developments and practical experience in large scale introduction of on¬

line PD diagnosisWouters, P.A.A.F., Mousavi Gargari, S., W&genaars, P., Tigchelaar, I.J., Simons, B.H.M.M.,

van der Widen, P.C.J.M., Steennis, E.F 183

Paper D-21: Continuous condition monitoring of MV cable connections and PD interpretation

Mousavi Gargari, S., Wouters, P.A.A.F., van der WieJen. P.C.J.M., Steennis, E.F 184

Paper D-22: Thermal-hydraulic investigation of transformer windings by CFD-modelling and

measurements

Weinlader, A., Tenbohlen, S 185

Friday 28 August 2009, 09:00-10:30:


Paper D-23: Interpretation of acoustic PD-information for synchronous multi-site electric and

acoustic PD-measuremcnts

Bergmann, V., Broniecki, U., Twittmann, J., Plath, R., Kalkner, W. 186

Paper D-24: Optimization of UHF sensor geometry for on-line partial detection in cable termi¬

nations

Denissov, D., Kohler, W., Tenbohlen, S,, Grund, R., Klein, T 187

Paper D-25: On-site testing and diagnosis of transmission power cables

GuisJri, E., Cichecki, P., Smit, J.J., Jongen, R.A., Seitz, P.P., Hermans, T.J.W.H., de Vries, F.188

Paper D-26: Algorithmic determination of pole-zero representations of power transformers'

transfer functions for interpretation ofFRA data

Heindl, M., Tenbohlen, S., Kr&etge, A., Krtigcr, M., Velasquez, J.L 189

Paper D-27: Observation of dielectric parameters at generator stator windings under changing

environmental conditions

Sumereder, C. Muhr, M., GroBalber, M., Ahrer, A., Balber, H., Korbler, B 190

Monday 24 August 2009, 13:30-17:00:

Poster Session : Diagnostics 191

Paper D-28: Towards semantics-based monitoring and diagnosis of power transformers

AJcbari, A., Setayeshmehr, A., Borsi, H., Gockenbach, E 191

Paper D-29: Two level on-line monitoring system approach for H.V. GIS

Al-Suhaily, M., Meijer, S., Smit, J.J., Gulski, E., Ranters, J 192

Paper D-30: Potential ofmultispectral PD measurementfor differentiation ofinterfering impulses

and multiple PD sources

Balkon, C, Kalkner, W., Obralic, A., Plath, R., Rethmeier, K 193

Paper D-31: Evaluation of acoustic emission signatures of on-load tap-changers

Trinda.de, M.B., Martins, H.J.A 194

Paper D-32: Wireless data acquisition system for high voltage substations

Bogias, A.C., Harid, N., Haddad, A.M., Griffiths, H 195

Paper D-33: Visualisation of synchronous acoustic and electric PD-measurement data

Broniecki, I}., Bergmann, V., Twittmann, J., Kalkner, W., Obralic, A 196

Paper D-34: Critical review of commissioning/routine tests with special interest in undetected

defects in SF^ GIS/GITL using UHF method

Cebekhulu, J., Beutel, A.A., Jandrell, I.R 197

Paper D-35: Comparison of PD measurements results by means of different energizing and

detection methods

Cichecki, P., Gulski, E., Smit, J.J., Hermans, T.J.W.H., Bodega, R., Jongen, R.A., de Vries, F.198

Paper D-36: Sensitivity limits of UHF PD measurements on power transformers

Coenen, S., Tenbohlen, S., Markalous, S., Strehl, T 199

Paper D-37: The application of non-intrusive techniques for locating gassing sources in large

power transformers

De Klerk, P. J., Kruger, N.S 200

Paper D-38: Optimal partial discharges diagnosis of medium voltage power cables

Gulski, E., Sinambela, E.J., Chichecki, P., Smit, J.J., Petzold, F., de Vries, F., Seitz, P.P.. .

201

Paper D-39: Partial discharge signal analysis in cross-bonding joints

GuJsJci, E., Munir, B.S., Smit, J.J., Quak, B., Seitz, P.P. 202

Paper D-40: Investigation of high frequency PD signal propagation in three phase power cables

Hio Nam, J.O., Blackburn, T.R., Vakilian, M., Phung, B.T 203

xii

Paper D-41: A new verification method of the UHF PD detection techniqueOkabe, S., Ueta, G.. Kaneko, S., Ito, T., Nishida, C, Kamei, M 204

Paper D-42: On-site insulation tests ofhigh voltage GIS in Iran: A review

Mohseni, H., Shayegani-Akmal, A.A., Jadidian, J., Hashemi, E., Naieny, A., Ghorban-

daeipour, A.. Khanali, M 205

Paper D-43: The influence of carboxylic acids on the dielectric performance of oil-paper insula¬

tions

Jovalekic, M., Tenbohlen, S., Koch, M 206

Paper D-44: Development of pre-breakdown partial discharge detection method for cause anal¬

ysis of insulation breakdown in EHVXLPE cable and jointKim, C.S., Kim, Y.H 207

Paper D-45: Experiences with the practical application of sweep frequency response analysis

(SFRA) on power transformers

Kraetge, A., Kriiger, M., Velasquez, J.L., Heindl, M., Tenbohlen, S 208

Paper D-46: Identification of inter-layer faults in a capacitively graded bushing due to very fast

transients using cascade correlation neural network

Dharani, P., Mohana Rao, M 209

Paper D-47: Analysis of partial discharge signal patterns in XLPE cable under various soil

conditions using self organizing mapMd Thayoob, Y.H., Samsudin, M.J?.., Abd Ghani, A.B., Ghosh, PS 210

Paper D-48: Novel microwave techniques for PD diagnosis in existing GIS/GCB

Miyashita, M., Minagawa. T., Hisatome, N., Kamei, M., Ishigaki, 1 211

Paper D-49: Influence of T-branch structure of model GIS on propagation properties of PD-

induced electromagnetic wave

Nakano, T., Omori, K., Sawada, M., Yamamura, Y., Ohtsuka, S., Kozako, M., Ikeda, H.,

Hikita, M., Hoshino, T., Maruyama, S., Sak&kibara, T., Ueta, G., Okabe, S 212

Paper D-50: PD monitoring ofHVXLPE cable lines

Koltunowicz, W., Obralic, A., Plath, R 213

Paper D-51: Pulse sequence analysis of PD-data measured on outer boundary surfaces

Obralic, A., Plath, R., Kalkner, W. 214

Paper D-52: Influence of a disconnecting part on propagation properties of PD-induced electro¬

magnetic wave in model GIS

Ohtsuka, S., Ikeda, H., Hikita, M., Nakano, T., Omori, K., Sawada, M., Yamamura, Y.,

Kozako, M., Hoshino, T., Maruyama, S., Sakakibara, T., Ueta, G., Okabe, S 215

Paper D-53: Benefits of synchronous UHF and IEC-compliant PD measurements for effective

noise suppression

Rethmeier, K., Weissenberg, W., Vogelsang, R., Plath, R., Hoek, S., Kraetge, A., Kriiger, M. 216

Paper D-54: Development and application of innovative partial discharge analysis algorithmsusing advanced measuring systems

Kuljaca, N., Meregalli, S., Rizzi, G., Ceretta, G, Gobbo, R.. Pesavento, G 217

Paper D-55: Evaluatingofwater exchange between oil and paper in transformers under operationcondition

Setayeshmehr, A., Abdallah, J., Akbari, A., Borsi, H., Gokenbach, E 218

Paper D-56: Stray hydrogen gas evolution from power apparatus

Patei, J.J., Muthuraj, R., Shah, N.V. 219

Paper D-57: Measuring techniques and setup for synchronous acoustic and electric multi-site

PD-analysis

Twittmann, J., Bergmami, V., Broniecki, U., Plath, R., Kalkner, W. 220

Paper D-58: Monitoring and diagnosis for life management of cable systems

Zhang, X., Gockenbach, E., Borsi, H. 221

xiii

Topic E: Outdoor Insulation 223

Tuesday 25 August 2009, 09:00-10:30:

Oral Presentations : Outdoor Insulation-1, Meeting Room 1.41 & 1.42 224

Paper E-l: A comparative study between hydrophobicity and roughness measurements on the

composite insulator housingDe Mello, D.R., Garcia, R.W.S., de Mendonga, J.R., de Oliveira, J.L 224

Paper E-2: Prediction of electrical performance of medium voltage epoxy insulated equipmentGorur, R., Iyer, G., Krivda, A., Mahonen, P. 225

Paper E-3: Development of methodology for monitoring composite insulators in service

Garcia, R.W.S., Paiva, O.L.S., da Costa, E.G., Ferreira, L.F.P, Mello. D.R 226

Paper E-4: Pollution test methods for polymeric insulators: Simulation of coastal environment

and recovery of hydrophobicity

Gutman, I., Dernfalk, A., Nefedov, A., Seifert, J.M 227

Paper E-5: Improvementofcontamination flashover voltage performance of cylindrical porcelain

insulators by partial coating of silicone rubber

Matsuoka, R., Kondo, K., Yamada, K., Hayashi, A., Sakanislii, K., Ito, S 228

Thursday 27 August 2009, 09:00-10:30:


Paper E-6: Estimation of insulators pollution based on spectral analysisda Costa, E.G., Fcrreira, T.V., Vihr, P.B., Gemmiio, A.D., Bezerra, J.M.B 229

Paper E-7: Evaluation of polymeric insulators retired from 138kV lines

De Mello, D.R., Gonzalez, E.G.C., Cardoso, P.A., Aguiar, G, Viviani, L 230

Paper E-8: Minimum approach distance calculation for safe live works in presence of line

composite insulators according to IEC 61472 criteria

Valagussa, C, Kulj&ca, N., Mazza, P., De Dona, G., Rendina, R 231

Paper E-9: Flashover performance of insulation surfaces under combined DC stress and air flow

Victoria Lopez, R., Gockenh&ch, E., Borsi, H 232

Paper E-10: Ageing test of silicone rubber insulators in clean fog conditions

Wieczorek, K., Bretuj, W., Fleszynski, J 233

Thursday 27 August 2009, 11:00-12:30:


Paper E-ll: Inclined plane test of composite, silicone rubber and composite silicone rubber

coated materials

Baharom. M.N.R., Cotton, I. 234

Paper E-12: Comparative study of RTV coated glass and porcelain disc insulators with polymericinsulator under pollution conditions

Devendranath, D., Aravind, K.A., R.amulu, A., Kumar, M.M., Ram, S.S.T., Saleem, S.A.. . 235

Paper E-13: Tracking and erosion of composite insulators and spacers - A comparative study of

test methods

De Mello, D.R., Garcia, R.W.S., de Mendonga, J.R 236

Paper E-l4: Evaluation ofthe performance of HTV silicone rubber exposed to AC & DC surface

discharges using the inclined plane test

Heger, G., Vermeulen, H.J., Vosloo, W.L 237

Paper E-15: Dielectric performance of composite housing

Pigini, A., Cardano, P., de Nigris, M., Rocchetti, G 238

Thursday 27August 2009, 15:30-17:00:


Paper E-16: Determination of U50 breakdown voltage for long air gaps submitted to a negativeswitching voltage using a predictive dynamic model

Beroual, A., Rakotonandrasana, J.H 239

Paper E-17: Study on the flashover characteristics of air gaps for San-Hu ±500kV double line

transmission tower

Ding, Y., Liao, W., Li, Q., Sun, Z 240

Paper E-18: Modelling of surface charge decay in a spherical cavity within a solid dielectric

material using finite element analysis

Blias, H., Chen, G., Lewin, P.L 241

xiv

Paper E-19: Auxiliary spark gaps for transformer protectionSeitshokelo, K.V., Beutel, A.A., Geldeahuys, H.J., Cebekhulu, J 242

Paper E-20: Study of deterioration mechanism and evaluation methods for insulator frames in

vacuum circuit breakers

Wadn, T., Ueda, T., Koyama, T, Sasamoto, A 243

Tuesday 25 August 2009, 13:30-17:00:

Poster Session : Outdoor Insulation 244

Paper E-21: Behaviour of corona discharges between a metal electrode and water surface under

AC voltage stress

Ima.no, A.M., Beroual, A 244

Paper E-22: Discharges current characteristics ofwater droplets on dielectric solid surface under

AC voltage stress

Imano, A.M., Beroual, A 245

Paper E-23: Improvement ofsurge arresters mechanical performance by analysing critical loads

to which they are exposed and by optimising their installation on overhead power transmission

lines

Babuder, M., Becan, M., Dodig, M., Zemljaric, B 246

Paper E-24: Transient phenomena by controlled switching ofhigh voltage shunt reactor in 123kV

transmission network

Bojic, S.. Uglesic, I., Jamau, N. 247

Paper E-25: An estimation of tall constructions height impact on striking distance using a

computer simulation

Charalambakos, V.P., Pyrgioti, E.C., Nikolaou, N., Stamatelatos, CP. 248

Paper E-26: Electrical and temperature characteristics of polymer surge arrester with thermal

mechanical stress and manufacturing conditions

Cho, H.,Yoo,D 249

Paper E-27: Tracking deterioration properties of polymeric insulator depending on housing

materials

Cho, K, Yoo, D 250

Paper E-28: Silicone rubber insulators with notched surface

Chrzan, K.L 251

Paper E-29: Lightning impulse performance of polluted medium voltage insulators

Chrzan, K.L 252

Paper E-30: Effect of impulse polarity on the flashover voltage of polluted cap and pin insulators

Chrzan, K.L., Schwaxz, H., Hauser, H 253

Paper E-31: Artificial rain test of outdoor long rod insulators

Chrzan, K.L., Streubel, H 254

Paper E-32: Hygroscopic properties of natural pollutants on silicone rubber surface

Chrzan, K.L., Greyling, C 255

Paper E-33: Influence of manufacturing imperfections and water drops in the electric field

distribution of polymeric insulators

da Costa, E.G., Vilar, P.B., Ferreira, T.V., Sousa, F.P.F., Torres, I.S.M., Gennano, A.D.. .

256

Paper E-34: Effect of artificial aging on polymeric spacersda Costa, E.G., Ferreira, T.V., Angelini, J.M.G., Germano, A.D., Molina, F.H., Medonca, P.L.257

Paper E-35: Studies on pollution performance of ceramic insulators under AC excitation

Dixit, P., Krislman, V., Nagabhushana, G.R 258

Paper E-36: Dynamic behaviour of water droplet for evaluating outdoor insulator

Du, B.X., Xia, Y.S., Liu, Y., Yang, B.X 259

Paper E-37: Study of factors influencing voltage profiles along mixed insulator strings

Dumakude, T.S., Ijumba, N.M., Britten, A.C 260

Paper E-38: Influence of filler type and level on the electrical and thermal performance of RTV

silicone rubber coatings

Ehsani, M., Farahang, F., Jazayeri, S.H. 261

Paper E-39: Prediction of partial discharges at water drops on insulating surfaces stressed by

electrical field

Feier-Iova, S., Hinrichsen, V 262

Paper E-40: UHV series-compensated transmission line equipped with new distance protectionBalcerek, P., Fulczyk, M., Saha, M.M., Rosohwski, E., Izykowski, J., Pierz, P. 263

xv

Paper E-41: An electro-thermodynamic model for the analysis of the pollution flashover perfor¬

mance of practical insulators

Holtzhausen, J.P. 264

Paper E-42: Improvement of electrical characteristics of composite line post insulator on the

basis of 3D distribution of potential analysisHrastnik, J 265

Paper E-43: Research of safety protection for live working on lOOOkV AC ultra high voltagetransmission line

Liu, K, Wang, L.N., Hu, Y., Shao, G., Liu, T., Hu, J., Xiao, B 266

Paper E-44: Pollution accumulation performance of various types of cylindrical insulators

Kondo, K, Suzuki, Y., Fajii, O., Ito, S., Maeda, M., Nakachi, T 267

Paper E-45: Overhead line temperature monitoring by using SAW sensor technology

Komhuber, S., Bohme, H., Gao, Z., Markalous, S., Strehl, T., Pfandl, W 268

Paper E-46: Aging performance of EPDM and HTV SR insulators for HVAC and HVDC excita¬

tion using the tracking wheel test

Limbo, S.B., Vermculcn, H.J., Vosloo, W.L., Pieterse, P.J., Holtzhausen, J.P. 269

Paper E-47: Flashover model of HVAC insulators under non-uniform pollution

Teguar, M., Mekhaldi, A., Boubakeur, A., Haxid, N 270

Paper E-48: Impulse breakdown of short rod-plane gaps with a rod covered with different

dielectric materials

Mavroidis, P.N., Mikiopoulos, P.N., Stassinopoulos, C.A., Zinonos, M 271

Paper E-49: The new technologies of live workingOvsyannikov, A., B&tralcov, A., Korobkov, N 272

Paper E-50: The insulating properties of accessories for live workingOvsyannikov, A., Batrakov, A., Korobkov, N 273

Paper E-51: Design and testing of UHV bushingsPigini, A., Testin, G 274

Paper E-52: Electric field performance of an overhead line inspection robot - Preliminary results

Pretorius. P.H., Mahatho, N., Boje, E., Lorimer, T 275

Paper E-53: Magnetic field exposure of live line workers on high power transfer 765kV and

400kV power lines

Pretorius, P.H., Luhlauga, P., Bhulose, P.T 276

Paper E-S4: Wild fire faults on 765 kV lines - Modelled conditions and electrical performancePretorius, P.H., Muftic, D 277

Paper E-55: Live-line work gaining ground supported by technology advances and the strategicadoption by co-operationsSnyders, A., Enslin, J., Naidoo, P., Reichmeider, P., Tuttle, J 278

Paper E-56: SVC compensation for relatively weak high voltage networks feeding a 25 kV and

50 kV AC traction power systems for the operation of high power train services

Swanson, A., Jain, S., Goh, S 279

Paper E-57: Positive streamer propagation along profiled insulating surfaces with room temper¬ature vulcanized silicone rubber coatings

Mikropoulos, P.N., Tzimkas, L.C., Giannopoulos, T.P., Tsintikidis, P.G 280

Paper E-58: New composite insulator string designed for 400 kV overhead line using statistical

insulation coordination procedureVizintin, S., Uglesic, I., Vertacnik, B., KiBe, H., Barl, B., Lesjak, S 281

Paper E-59: Dry-band breakdown oflightly polluted insulators

Waters, R.T., Haddad, A.M., Griffiths, H., Harid, N., Sarkar, P. 282

Paper E-60: Mechanisms for the breaking of OPGW by lightningHu, Y., Liu, K., Wang, L.N. 283

Paper E-61: Modelling of dry-band arc compression

Zhang, X., Rowland, S.M., Terzija, V. 284

xvi

Topic F: System Aspects 285


Oral Presentations : System Aspects-1, Meeting Room 1.43 & 1.44 286

Paper F-l: Optimization of asset maintenance strategies and power flow operation based on

condition diagnoses

Endo, F., Shiomi, R., Suzuki, Y., Kojima, H., Hayak&wa, N., Okubo, H 286

Paper F-2: An improved preventive maintenance technique for freely breathing power trans¬

former

Fofana, I, Sabau. J., Bouaicha, A., Farzaneh, M 287

Paper F-3: Evaluation of transformer reliability data based on national and utility statistics

J&gers, J., Tenbohlen, S 288

Paper F-4: Fuzzy and neuro-fuzzy models for condition assessment of power systems equipmentKrontiris, T., Balzer, G 289

Paper F-5: High voltages with high harmonic content: The influence on dielectric heating

Sonerud, B., Bengtsson, T., Blennow. J., Gubariski, S.M 290

Thursday 27 August 2009, 11:00-12:30:

Oral Presentations : System Aspects-2, Meeting Room 1.43 & 1.44 291

Paper F-6: Space charge accumulation in epoxy based magnesium oxide and boron nitride

nanocomposites

Andritsch, T., Kochetov, R., Gebreldos, Y.T., Lafont. U., Morshuis, P.H.F., Smit, J.J 291

Paper F-7: Investigations on the influence of the cross-link density on the dielectric breakdown

strength and the mechanical properties of silicone gelsBelz, O., Finis, G., Claudi, A., Claudi, A 292

Paper F-8: Apollo ±533 kV HVDC converter station: Experimental verification ofbridge housingclearances to earth

Britten, A.C., Seitshokelo, K.V.. Miya, W.S., Roets, H.A., Sibilant, G.S 293

Paper F-9: Critical aspects for short circuit performance of large power transformers connected

to UHV system

Gupta, S.K., Kuntia, J.S., Tiwari, R.K., Dave, A.K 294

Paper F-10: Resistance to high voltage arcing for silicone rubber/SI02 nanocompositesRaetzke, S., Kindersberger, J 295

Friday 28 August 2009, 09:00-11:00:

Poster Session : System Aspects 296

Paper F-ll: Optimization ofcondition-based asset management using a predictive health model

Bajrac.harya, G., Koltunowicz, T., Negenhorn, R.R., Papp, Z., Djairam, D., De Schutter, B.,

Smit, J.J 296

Paper F-12: The development of an architecture of common information interface for asset

management of electricity grid

Bajracharya, G., Koltunowicz, T., Djairam, D., Smit, J.J 297

Paper F-13: Application of support vector machine in data mining of partial discharge

Lai, KX, Phung, B.T., Blackburn, T.R 298

Paper F-14: Investigation of the surface flashover behaviour of cylindrical insulators in liquid

nitrogenBlaz, M., Hilbert, M., Kurrat, M 299

Paper F-15: Test result for 22.9kV 50MVA HTS cable system in Korea and application in real

gridChoi, C.Y., Jang, EM., Kim, C.D., Lee, S.K., Jeon, S.I., Park, W.K 300

Paper F-16: Improved condition assessment by fuzzy-modelling, adjustment and merging of

DGA's interpretation methods

Fischer, M., Tenbohlen, S 301

Paper F-17: Uncertainty budgets of power transformer losses measurements

Gamlin, M. 302

PaperF-18: Identification and assessment ofnecessary investments in historically grownmedium-

voltage gridsHetzel, S., Schuffi, W. 303

xvii

Paper F-19: Tools to assess behaviour and condition of high-voltage equipment

Hille, C, Federlein, S., Schnettler, A 304

Paper F-20: Statistical analysis oflifetime data ofservice aged components for assetmanagementdecision process supportJongen, R.A., Guhki, E., Sunt, J.J., Janssen, A.L.J 305

Paper F-21: Designing a transformer's aging model in the grid of the future

Koltunowicz, T.L., Bajracharya, G., Djairam, D., Smit, J.J 306

Paper F-22: New concept of high-voltage switchgear on-line monitoring system

Mestrovic, K, Poljak, M., Vidovic, M., Furcic, M., Loncar, M., Maras, I., Mik, A 307

Paper F-23: Integrated systems thinking for refurbishment: HV asset optimisation tools, systemsintegration

Mkandawire, B., Ijumba. N.M., Whitehead, H 308

Paper F-24: Asset management of HV equipment: Strategies & tools, maintenance and refur¬

bishment

Mkandawire, B., Ijumha, N.M.. Whitehead, H 309

Paper F-25: Markov & Weibull analysis for HV network maintenance: Reliability management,preventive maintenance

Mkandawire, B., Ijumba, N.M., Whitehead, H 310

Paper F-26: Internal fault diagnosis of HVDC converter transformer using wavelet transform

techniqueKrishna Murthy, P., Amarnath, J., Kamakshaiah, S., Singh, B.P. 311

Paper F-27: Large power transformers for alternative insulating fluids

Pukel, G.J., Eberhardt, R.., Muhr, M., Baumann, F., Lick, W. 312

Paper F-28: Rheological, thermal and electrical properties ofpoly(ethyIene oxide) / silicon dioxide

microcomposites

Reading, M.. Vaughan, A.S 313

Paper F-29: Managing reliability risks of ageing transformers with practical end-of-life condition

assessments

Ding, H.. Ryder, S 314

Paper F-30: Development of asset management support tools for electric power apparatus byevaluating average maintenance cost

Takahaslii, T., Okaiaoto, T 315

Paper F-31: Impact of load profiles, WTI settings and hotspot factors on loss-of-life of dual

cooling mode transformers

khak. M.T., Zhang, Q., Wang, Z.D 316

Paper F-32: Natural convection cooling in transformer network modellingWu, W., Wang, Z.D., Revell. A 317

Topic G: Transients 319

Tuesday 25 August 2009, 11:00-12:30:

Oral Presentations : Transients-1, Meeting Room 1.41 & 1.42 320

Paper G-l: Overview of a rocket-triggered lightning research facility in South Africa

Dickson. A.S., Grant, M.D., Jandrell, I.R., Nixon, K.J 320

Paper G-2: Experimental evaluation of potential rise and step and touch voltages at high voltagetowers under lightning impulses

Hand, N., Ullah, N., Ahmeda, M., Griffiths, H., Haddad, A.M., Ainsley, A 321

Paper G-3: Accurate PD location in transformers by study of its signal propagation using MTLmodel

Hosseini, S.M.H., Ghaffarian Niasar, M., Vakilian, M 322

Paper G-4: Microvaristor filled silicone elastomers - Advantages and restraints of principaladaptabilityStolz, J., Guthcil, B., WeiB, P. 323

Paper G-5: A statistical method for lightning incidence calculations in transmission lines

Mikropoulos, P.N., Tsovilis, T.E 324

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Thursday 27 August 2009, 13:30-15:00:


Paper G-6: Lightning location networks performance validation with RLDN

Djurica, V., Milev, G., Kosmac, J 325

Paper G-7: Determination of acceptable closing time scatter and residual flux measurement

uncertainty for controlled switching of transformers

Ebner, A 326

Paper G-8: Overvoltage investigations of cable shieldings and protection methods

Fabian, J., Pack. S., Muhr, M 327

Paper G-9: Experimental investigation on soil ionization

Asimakopoulou, F.E., Gonos, J.F.. Stathopulos, LA 328

Paper G-10: The influence of lightning on 11 & 22 kV lines with varying BIL

Jooste, F.J., van Schalkwyk, W.J.D, Britten, A.C 329

Friday 28 August 2009, 09:00-10:30:


Paper G-ll: Calculation of energy stress on surge arresters in 275kV transmission lines

Bhat.tarai, R., Griffiths, IL, Harid, N., Haddad, AM 330

Paper G-12: Earth surface potential calculation using scale model with scaling time of appliedimpulse current

Ghcmeim, S., Hirsch, H. 331

Paper G-13: Evaluation of lightning flashover risk of HV overhead transmission lines

Gu. S.Q., Chen, J.H., Tong, X.F., Li, X.L 332

Paper G-14: Influence of the new k-factor method of the IEC draft 60060-1 on the evaluation of

lightning impulse parameters in relation to ultrahigh-voltage testingHinow, M., Steiner, T 333

Paper G-15: Evaluation of novel parallel connected current sharing spark gap devices under

10/350 /is and 8/20 jis current impulse conditions

Michalopoulos, A., Govender, T.. Duncan, B.R., Van Coller, J.M., Jandrell, I.R 334

Thursday 27 August 2009, 13:30-17:00:

Poster Session : Transients 335

Paper G-16: An outdoor 7.2MV impulse generator

Ai, X., Ding, J 335

Paper G-17: Factors which determine the voltage distribution within the windings of transform¬

ers connected to gas insulated substations

Pinches, D.S., Al-Tai, M.A 336

Paper G-18: Simulation ofperformance of HV power transformer model winding provided with

metal oxide surge absorber blocks to fast transient voltages

Ansari, M.Z.A., Gurumurthy, G.R., Amarnath, J. 337

Paper G-19: Arc behaviour in small capacitive current interruption with high-voltage air-break

disconnectors

Chai, Y., Wouters, P.A.A.F., Van Hoppe, R.T.W.J., Sweets, R.P.P. 338

Paper G-20: Discrete wavelet transform in power systems: Transient disturbance analysisCosta, F.B., Souza, B.A., Brito, N.S.D 339

Paper G-21: A recursive filter to correct disturbance in the secondary voltage of coupling

capacitor voltage transformers

Machado, E.P., Fernandas Jr., D., Neves, W.L.A 340

Paper G-22: Energy injection effect on transient grounding resistance

Diaz, R.R., Silva, J.N 341

Paper G-23: Dealing with transient recovery voltage in generator circuit breaker

Drommi, J.L, Telmon, A., Digard, H. 342

Paper G-24: Mitigation of fast dU/dt for protection of distribution transformers

Florkowski, M., Fulczyk, M., Ostrogrska, M., Piasecki, W 343

Paper G-25: Protection zone estimation for high lightning rods by a fractal approach

He, J.L., Zhang, X.W., Zeng, R., Tu, Y.P. 344

Paper G-26: Dielectric recovery of vacuum circuit breaker after interruption of high current

arcs in presence of very intense AMF

Hayati Sohot, A., Gholami, A., Jadidian, J., Niayesh, K 345

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Paper G-27: A calculation of switching transient overvoltage on combined transmission systems

Jung, C.K., Kang. J.W., Lim, K.S., Lee, J.B 346

Paper G-28: Experimental study on strands breaking of OPGW by lightning and exploration of

preventive measures

Liu, K., Hu, Y., Wang, L.N. 347

Paper G-29: Evaluation of lightning parameters correlated with distribution line faults

Kosmac, J., Milev, G., Tows, Z 348

Paper G-30: Experimental validation of the hybrid method for near lightning electromagneticfield calculation taking into account the conductivity of the soil

M'ziou, N., Moklmache, L., Boubakeur, A 349

Paper G-31: A multipulse lightning current generator with compact and controlled switchingFilho. O.O., da Rocha. J.C., Caixo, S., Bianchi, R 350

Paper G-32: Protection performance of lightning protection systems under switching surge

voltages

Faydali, Z., Ozdemir, A., Ihan, S 351

Paper G-33: Analysis of overvoltage for GEL system between overhead transmission lines byEMTP

Park, H.S., Kang, J.W., Jang, T.I, Jung, C.K., Han, S.0 352

Paper G-34: On the tower footing resistance of micropile anchors

Pretohus. P.H., Semmelink. C.J 353

Paper G-35: Accelerated ageing test for metal-oxide varistors used for overvoltage protection in

inverter-fed drives

Rocks, A., Hinrichsen, V. 354

Paper G-36: Line surge arrester application on 123 kV double circuit line

Sadovic, S., Babuder, M., Hrast, M., Bokal D., Marinsek, M., Sadovic, T 355

Paper G-37: A model for lightning over-voltage calculations in case of intersection of 400 kV

overhead-lines to cable lines

Schmidt, U., Schufft, W 356

Paper G-38: Response of 220kV 100MVA transformer for non-standard impulsesSumangala, B.V., Nagabhushana. G.R 357

Paper G-39: Transient recovery voltage of 400 kV SF6 circuit breaker when clearing short-line

fault

Uglesic, I.. Filipovic-Grcic, B., Milardic, V., Ivankovic, 1 358

Paper G-40: Possible applications of a tapped reactor series connected to a transmission line in

the high voltage gridWenzel, T., Leibfried, T 359

Paper G-41: Side effects of current-limiting reactors in transmission line

Yang, P., Chen, S., Xu, W., Bian, X., Wang, W. 360

Paper G-42: Measurement of the speed of leader progression in long air gap breakdown bymeans of electro-optic integrated sensor

Zeng, R., Ceng, Y., Yu, Z.Q., Zhang, B., Li, H., He, J.L 361

Paper G-43: Research on comprehensive lightning protection measures of lOkV insulated over¬

head lines

Zhou, W., Han, X., Ma, W., Yu, J., Wang, X 362

Paper G-44: Study on whole parameters of stroke current real-time monitoring systemLi, H., Zhao, J.N., Zhou, W.J., Wang, J.L., Wen, H., Li, Z.Z., Wang, T 363

Index 365

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cape town, southafrica 24-28 august2009 - gbv · 2012-08-19 · two specialist reviewers, ......

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