international symposium on high voltage engineering ; 6 ... · pdf filehigh voltage...

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ELECTRICAL ENGINEERING DEPARTMENTMISSISSIPPI STATE UNIVERSITY

PROCEEDINGS

VOLUME 1

SIXTH

INTERNATIONAL

SYMPOSIUM ON

HIGH VOLTAGE

ENGINEERING

28 AUGUST - 1 SEPTEMBER, 1989

WESTIN CANAL PLACE HOTEL

NEW ORLEANS, LOUISIANA, USA

COOPERATING ORGANIZATIONS

IEEE

DIELECTRICS & ELECTRICAL INSULATION SOCIETY

POWER ENGINEERING SOCIETY

ELECTRIC POWER RESEARCH INSTITUTE

CIGRE

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SESSION 10 - Lightning

Chairman: Dr. Hartin Uman

University of Florida

Gainsville, FL, U.S.A.

10.01 Integrated Lightning and Overvoltage Protection.M. Darveniza (Invited Lecture)

* (Australia)

10.02 Traveling Waves Caused by Lightning on High VoltageTransmission Lines and in Substations.G. Diendorfer, W. Hadrian, F. Hofbauer, G.Moraw

(Austria)

10.03 Simulations of Upward Lightning.Takatoshi Shindo, Yoshinari Aihara

(Japan)

10.04 Lightning Stroke to a Structure Protection System - Part I:

Current Distribution Analysis.S. Cristina, M. D'Amore, A. Orlandi

(Italy)

10.05 Lightning StroKe to a Structure Protection System - Part II

Electromagnetic Field Analysis,M. Feliziani, A. Orlandi

(Italy)

10.06 Conditions for Corona Discharge on Installation Shielded

Against Lightning Stroke.

Z. Flisowski, B. Stanczak, C. Mazzetti, H. Pompili(Italy)

10.07 The Influence of the Arc Root in Flashover Models of

Polluted Insulators with Pratical Shapes.

J. P, Holtzhausen, L. P. du Toit

(South Africa)

10.08 Lightning Current Measurement and Diagnostics by a

Microcomputer and Optical Systems,M. Yoda, K. Nakamura, I. Miyachi, K. Horii

(Japan)

10.09 Time Dependent Temperature Distribution in Metal Sheets

Caused by Direct Lightning Strikes.

Alexander W. Kern

(Federal Republic of Germany)

SESSION 11 - HV Phenomena in

Generators, Transformers,

Cables, and Breakers

Chairman: Dr. Stamslaw Grzybowski

Mississippi State University

Mississippi State, MS, U.S.A.

11.01 Viewpoints in the Application of Almost Homogeneous

Electro-Static Fields for Electrotechnical Equipment.

x M. Dietrich, W. Mosch (Invited Lecture)

(German Democratic Republic)

11.02 Frequency Domain Characteristics of High-Ratio Step-Up

Transformers for High Voltage Test Applications.

H. J. Vermeulen, R. G. Koch, W. L. Rawlins

(South Africa)

11.03 Determination of the Risk of Ferroresonance in High Voltage

Networks. Experimental Verification on a 245 kV Voltage

Transformer.

N. Janssens, A. Even, H. Denoel, P. A. Monfils

(Belgium)

11.04 Protection of High Voltage Power Frequency Test Transformer

During Bias Voltage Test.

J. J. Patel, P. Satyanarayana, D. Mukhedkar

(India)

11.05 Induced Overvoltage Test and Partial Discharge Measurement

of Large Power Transformers on Site.

Hossein Mohseni, M. Manouchehrian, F, Pardjishvar, Dj. Velayat


11.06 Dielectric Strength of Oil-immersed Transformer Insulation

under Superimposed Voltage Condition Between Lightning

Impulse and AC Voltage,

Y. Kamata, K. Endoh, S, Furukawa, F. Endoh, K. Nonomura,

Y. Iwata, S. Horiuchi, N, Takasu

(Japan)

11.07 Measurement and Analysis Techniques for Assessing the

Influence of High-Voltage Lightning Power on the Insulation

and Core Properties of Transformers.

H. C. Koh, R. Miller, D, M. Ryder, K. J. Overshott

(Great Britain)

11.08 Evaluation of the Surge Voltage Withstand Level of

Insulation System in High Voltage A.C. Rotating Machines

with Form Wound Stator Coils.

M. Bressani, A. Contin, G. Rebach, F. Razza, M. Secco

(Italy)

SESSION 12 - Outdoor Insulation

Chairman: Dr. Vernon L. Chartier

Bonneville Power Administration

Vancouver, WA, U.S.A.

12.01 Effect of Hydrophobicity on Insulator Performance.J, Kindersberger, M. Kuhl


12.02 Comparison of Quick Flashover Method with Standard TestProcedure for Determining the Pollution Flashover LevelsUsing Saltfog Method.

N. Vasudev, K. N. Raui, A. K. Mujunder, C. S. Lakshminarasimha,V. B. Ram Mohan

(India)

12.03 Physical Approach to Wet Switching Impulse Discharges on

Toughened Glass Post Insulators.

B. Hutzler, J. F. Ricaud, A. Gibert, J. Dupuy, P. Domens,E. Brocard, G. Bourdier, R. Joulie

(France)

12.04 Time-Dependent Stochastic Modelling of Surface Flashovers on

Contaminated Insulators.

A. Rodriguez, D. E. Cooper, F. Wang, T. C. Cheng(United States of America)

12.05 Measurement of the Temperature of a Local Arc PropagatingAlong a Polluted Dielectric Surface.

Li Shunyuan, Zhang Renyu, Tan Kexiong(P.R. of China)

/

12.06 The Effect of Air Density on the Impulse Characteristics

of Wood Pole Insulation.

J. P. Holtzhausen, C. S. Engelbrecht(South Africa)

12.07 Registration Instruments for Measurements of LeakageCurrents on Polluted Insulators,

D. M. Leite, P. L. Teixeira, A. G. Kanashiro, A. Pedersen

(Denmark)

12.08 Influence of Outdoor Atmospheric Conditions to the Aging and

Life Duration of XLPE Insulation.

P. H. Nikolopoulos, D. P. Agoris, Z. G. Skoufas

(Greece)

12.09 Dynamic Model of Pollution Flashover.

Z. Haznadar, K. Sokolija, S. Sadovic

(Yugoslavia)

12. 10 DC Rain Flashover Characteristics of Suspension Insulators

for High Altitude Regions.

Sun Caixin, Xie Jun, Gu Leguan, Zhang Jianhui, Chen Mingying

(P.R. of China)

SESSION 13 - Air Insulation; Solid

and Liquid Dielectrics (Poster)

Coordinator: Mr. A. Lynn Libby

Manager, High Voltage Lab.

Mississippi State University

Mississippi State, MS, U.S.A.

13.01 The Effect of Decaying Oscillatory Switching Waveforms on

the Breakdown of Rod/Sphere Gaps.Guan Zicheng, I. D. Couper

(Great Britain)

13.02 Influence of Humidity on the Dielectric Strength of LargeAir Gaps Under AC Voltages.

Zheng Jianchao, Yang Ymgmei

(P.R. of China)

13.03 Influence of Humidity on the Breakdown Characteristics of

Air Gaps, Under HVDC Application.

Paul Abraham, B. R. Prabhakar

(India)

13.04 Study of Flashover Performance and Discharge Mechanism of

Iced Insulators.

Jiang Xmgliang, Wu Shenlm, Sun Caixm, Gu Leguan,Zhang Jlanhui

(P.R. of China)

13.05 Analysis of Thermal Breakdown of Solid Dielectrics.

O. E. Gouda

(Egypt)

13.06 Water Treeing in a Heavily Oxidized Cross-Linked

Polyethylene Insulation.

A. T. Bulmski, S. S. Bamji, R. J. Densley, J. P. Crme,S. Haridoss, B. S. Bernstein

(Canada)

13.07 Breakdown Behaviour of a Non-Flammable Synthetic LiquidUnder Conditions of Particle and Moisture Contamination.

D. A. Hoch, J. P. Reynders(South Africa)

13.08 Effect of Fixed Metallic Particles on the Dielectric

Strength of Oil Insulation Under AC High Voltage Stresses.

Fathi M. H. Youssef, S. S. El-Dessouky(Egypt)

13.09 Pressure Properties of Water Gap Under High VoltageDischarge.Dmgjiu Li, Shoushen Chen


13.10 Lightning and Switching Impulse Surface Strength of

Processed Pressboard.

Z. Kolaczkowski, M. R. Raghuveer, S. Grzybowski, E. Kuffel

(Canada)

13.11 Thermoluminescence of Epoxy Composition During AgeingProcesses.

W. Zajac, J. Subocz, J. Michalski

(Poland)

13.12 Electrokinetic Pumping of Semi-Insulating Liquids UsingTraveling Wave High Voltages.A. P. Washabaugh, M. Zahn, J. R. Melcher(United States of America)

13.13 Fluid Electrification Measurements in TransformerPressboard/Oil Insulation.

A. J. Morin, M. Zahn, J. R. Melcher

(United States of America)

13.14 Partial Discharge Behavior of Halogenated Liquids.A. Ruffini, D. A. Hoch, J. P. Reynders(South Africa)

13.15 The Use of Gas-in-Oil Analysis to Assess the Extent of

Partial Discharge Ageing in Oil Paper Insulation CurrentTransformers.

J. P. Reynders, D. V. Meal

(South Africa)

13.16 Lightning Impulse Breakdown of Oil-Impregnated PaperInsulation.

S. R. Naidu, J. B. Neilson, K. D. Srivastava

(Brazil)

13.17 Correlation Between Degradation of Insulated Film and

Lifetime of Impulse Capacitors.S. Grzybowski, T. Las, R. Grychowski, A. Rakowska, P. Zvbielik


13.18 Some Ways for Increasing Stability of Polymer Insulation to

the Influence of Partial Discharges.M. A. Bagirov(Soviet Union)

13.19 Determination of Air Bubble Deformation and Surface Tension

Pressure in Insulating Liquids Under Electrical AppliedFields.

A. El-Zein

(Egypt)

13.20 The Dependance of Watertree Growth on Water Penetration

Through Semiconducting Layers.S. Pohler


13.21 The Influence of Morphology on the Water Tree Growth in

Polyehtylene.Naohiro Hozumi, Masayoshi Ishida


13.22 Image Data of Carbon Path Due to Tracking Deterioration.

Makoto Nishida, Noboru Yoshimura, M. S. A. A. Hammam


23 Initiation and Development of Impulse Discharge m

Transformer Oil in the Non-Uniform Electric Field.

A. N. Lobanov, Yu. V. Torshm, K. N. Ulyanov

(Soviet Union)

24 Development and Tests of Extruded Polymer Insulated

Superconducting Cable.

Masamitsu Kosaki, Masayuki Nagao, Yukio Mizuno,

Noriyuki Shinuzu, Kenj 1 Horn

(Japan)

25 High Field Conduction m Crosslinked Polyethylene (XLPE)

Under High Hydrostatic Pressure.

M. Farkh, F. Benlizidia, The Giam Hoang, B. Dalle

(France)

26 Electrical Strength of Silicone Elastomers for HV-Power

Supplies m Aircraft Systems.Bernd-D. Schmidt


27 Influence of Flexibil lzers and Dissolved Water on the

Dielectric Properties of Epoxy Resins.

Jarle Sletbak, Nils G. Gjelsten

(Norway)

28 Dissipation Factor Measurements on Water Treed and Non-Water

Treed XLPE Insulating Material.

S. Pohler


29 Discharge Characteristics of Polymer Films Irradiated by

Electron Beam.

M. Ish.ii, E. Tsumura, Y. Hojo, J. Otani

(Japan)

30 Floating Potential Bodies and Their Interaction with

Discharge Development.G. Baldo, G. Pesavento

(Italy)

31 An Approach to the Design of SF6-Film Insulation System.V. Varivodov, A. Dermkin

(Soviet Union)

32 High Voltage AC Breakdown in Presence of Fires.

K. J. Sadurski, J. P. Reynders

(South Africa)

SESSION 14 - Electrostatics

Chairman: Dr. E. Keith Stanek

Michigan Technical UniversityHoughton, MI, U.S.A.

14.01 A Monitor of the Corona Current Distribution inElectrostatic Precipitators.

* James L, DuBard (Invited Lecture)(United States of America)

14.02 Charging Process of Fine Particles in Unipolar Ion Flow.Takashi Sato, Hiroaki Tagashira(Japan)

14.03 A New Procedure for Electric Field Calculation in a DCElectrostatic Precipitator.S. Cristina, M. Feliziani

(Italy)

14.04 On Deutsche Assumption in Solution of Ionized DC Fields inGases.

George Gela


14.05 Electrostatic Lentoid Field and it's Optimizing Computation.Chen Shixiu, Chen Xuegou, Huang Huifeng(P.R. of China)

14.06 An Electrostatic Precipitator Using Packed FerroelectricPellet Layer for Dust Collection.

Akira Mizuno, Ito Hiroshi, Yoshida Hiroshi

(Japan)

14.07 Pulsed Corona Existence up to SSO'C.

E. J. M. Van Heesch, A. J. M. Pemen, P. C. T. Van der Laan

(Netherlands)

14.08 Elektrostatic Separation by Means of Contact Charging.H. Gsodam, M. Muhr, R. Woschitz

(Austria)

14.09 Fundamental Characteristics of Electrostatic Discharges-Separating Discharges and Rolling up Discharges in

Film/Roller System.Xianggang Ji, Yuzo Takahashi, Shigeo Kobayashi(Japan)

SESSION 15 - Partial Discharge

Chairman: Mr. Peter H. Reynolds

Biddle Instruments Co,

Blue Bell, PA, U.S.A.

15.01 The Study of Current Transducer System for On Line

Monitoring Partial Discharge m Electrical Equipment.

Changchang Wang, Heng Guo, Deheng Zhu, Kexiong Tan


15.02 Environmental Impacts Caused by a 380 kV Power Line - The

Influence of Contamination and Corrective Measures.

W. Hadrian, F. Hofbauer, H. Lugschitz, W. Kropik, L. Jermendy

(Austria)

15.03 Phase Resolved Partial Discharge Measurements and Computer

Aided Partial Discharge Analysis Performed on Different High

Voltage Apparatus.B. Fruth, L. Niemeyer, M. Hassig, J. Fuhr, T. Dunz

(Switzerland)

15.04 Improved Partial Discharge Detection Methods for Epoxy

Spacers m Gas-Insulated Switchgear.

N. Fujimoto, G. C. Stone, H. G. Sedding, S. Rizzetto

(Canada)

15.05 Location of Discharges in Power Transformers using External

Acoustic Sensors.

Lars E. Lundgaard, Walter Hansen, Kamil Dursun

(Norway)

15.06 A New Technique for Partial Discharge Detection in High

Frequency Magnetic Components.

B. H. Ward, G. M. Sunberg, P. H. Reynolds


15.07 Simulation of Partial Discharge Distribution by Monte Carlo

Method.

M. Hikita, K. Yamada, N. Nakamura, T. Mizutani, A. Oohasi,

M. Ieda

(Japan)

15.08 PD Probe Measuring Technique for On-Site Diagnosis Tests of

HV Equipments,

E. Lemke


15.09 On the Use of Expert Systems in High Voltage Testing.

Roger L. King


15.10 New Methods to Reduce the Disturbance Influences on the in

Situ-Partial Discharge (PD) - Measurement and Monitoring.

H. Borsi, M. Hartji


SESSION 20 - High Voltage Test

Equipment and Procedures

Chairman: Mr. Richard Reid

Hypotronics, Inc.

Brewster, NY, U.S.A.

20.01 High Voltage Test Equipment and Procedures,

K. Feser (Invited Lecture)* (Federal Republic of Germany)

20.02 High Voltage Comparative Measurements: An Alternative to the

U.S.R. Method to Characterize High Voltage Impulse Dividers.

A. Bonamy, F. Deschamps

(France)

20.03 Behaviour of Multisegment Electrodes Under Outdoor

Conditions.

M. Dietrich, W, Hauschild, W. Schufft


20.04 Effect of Location on High Voltage Damping Resistor in the

Bias Voltage Test Circuit.

J. J. Patel, D. Mukhedkar

(India)

20.05 Checking and Adjustment for Minimum Errors of Impulse

Dividers and Shunts.

N. Hylten-Caval lius, F. A. Chagas, P. Munoz Rojas

(Brazil)

20.06 Development and Application of Three-Electrode Spark Gaps

for Synthetic Circuits.

P. Osmokrovic, N. Rasovic, L. Miskin

(Yugoslavia)

20.07 Capacitance Test Points on Elbow Joints.

J. Balachandra, P. Purnaprasad, C. S. Viswanath


20.08 Further Experience with the Integration Method of Estimating

Non-Standard Impulse Insulation Strength.

M. Darveniza

(Australia)

20.09 5,4 MV Impulse Generating System.

S. G. Du, H. S. Tang, S. S. Wang, Y. X. Zhang, C. H. Lu

(P.R. of China)

20. 10 A Computer Model for the Investigation of Errors Related to

the Measurement of High Impulse Voltages.

P. N. Nikolopoulos, F. V. Topalis, F. G. Drampalos

(Greece)

SESSION 21 - Solid and Liquid

Dielectrics

Chairman: Dr. M. S. Hammam

Clarkson UniversityPotsdam, NY, U.S.A.

21.01 The Effect of Gas-Impregnation on the Aging Mechanism of

Polymeric Insulation.

S. S. Bamji, A. T. Bulinski, R. J. Densley

(Canada)

21.02 Dielectric Properties of Mica Epoxy Composites Subjectedto Thermal and Thermoelectrical Ageing.B. Fruth, G. Liptak

(Switzerland)

21.03 Long-Term Weather Resistance of Different High VoltageInsulating Materials-.

R. Van Der Huir, H. C. Karner, H. R. Aus Der Au, E. Hubler


21.04 Electrical Degradation of Binary Polyethylene Blends.

Anders Gustafsson, Ulf W. Gedde

(Sweden)

21.05 Breakdown Characteristics of Some Insulating Materials

"Polystryene PS Polyvinyle-Chloride PVC, and Baklite BA".

0, E. Gouda, A, A. Rasmy, S. S. El-Dessouky, S. A. Solyman(Egypt)

21.06 Electrical Conduction in Aromatic Polyamide Insulation.G, R. Govinda Raju

(Canada)

21.07 Dielectric and Thermal Mechanisms in High Voltage PolymerConcrete Insulation.

Muthian Gunasekaran


21.08 The Effect of the Moisture and Gas in Oi 1/PressboardInsulating System on the Oi1/Pressboard Interface Discharge.W. D. Wang, S, J, Wang, D. H. He, G. Han

(P.R. of China)

21.09 A Microphase-Separation Interpretation of the Covariation

of Several Polyurethane Dielectric Properties.R. S. Bretzlaff, R. Y. Sugihara(United States of America)

21.10 A Statistical Approach to the Distribution of BreakdownPoints on Epoxy Resin Molded Insulation.T, Maeda, F. Natsume

(Japan)

SESSION 22 - Fast Transients

Partial Discharge (Poster)

Coordinator: Mr. A. Lynn LibbyManager, High Voltage Lab.

Mississippi State UniversityMississippi State, MS, U.S.A.

22,02 Corona at Very High Direct Voltages. VI Corona in Rod/Plane

Gaps.

T. E. Allibone, J. C. Saunderson

(Great Britain)

22.04 Partial Discharge Measurements at Low Frequencies on HighVoltage Cables in Service Within the UK Utilities.

R. R. Mackinlay

(Great Britain)

22.05 Analysis of the Influences of Altitude on Coronas of the

Unipolar DC Transmission Lines.

Ye Fei-Yu, Fang Min, Xie Shu-Yong, Liu Chen

(P.R. of China)

22.06 Enhanced Diagnostic Procedures for Partial DischargeMeasurements in Rotating Machines.

S. A. Higgins, J. P. Reynders

(South Africa)

22.07 Development of Positive Corona Discharge from Two

Interacting Point in Air.

J. M. Chen, Z. Y. Li

(P.R. of China)

22.08 Effect of Desert Climatic Conditions on the Radio Noise

Level Generated by Extra High Voltage Transmission Lines.

A. Nosseir, E. El Sharkawi, M. Awad, F. Mostafa

(Egypt)

22.09 Acoustic Location of Partial Discharge in On-Line Power

Transformer.

Tang Liang, Wang Weil in

(P.R. of China)

22. 10 The Influence of Altitude on Corona-Starting Voltages.

Lu Chong-hui, Liu Zheng-xiang

(P.R. of China)

22.11 A Study of Quantifying Partial Discharge Measured by

Acoustic Method.

Qiu Changrong, Wang Yuxi, Feng Yunping, Gong Jiagin

(P.R, of China)

22.12 Partial-Discharge Measurement for Superconducting Magnets -

a Non-Destructive Test Technique for the Compound-Insulation

System.A. Nyilas, G. Schenk, A. Ulbricht, A. Hinderer, F, Oechsler,

A. Schwab


22.13 The Abilities of Self Operating Expert Systems for

Statistical Partial Discharge Analysis of GIS-Test Signals.

Hans-Gerd Kranz, Reiner Krump


22.14 Transient Propagation Along Coronating Monopolar

Transmission Lines.

D. V. Brankovic, M. R. Raghuveer, I. M. R. Ciric

(Canada)

22.15 Towards an Understanding of a Formal Mathematical Definition

of Generalised Breakdown.

M. Darveniza, S, Fujimori

(Australia)

22. 16 Harmonic Content of Corona Currents.

M. T. Correia de Barros, M. E. Pinto de Almeida

(Portugal)

22. 17 Image Analyzing of Surface Discharges.

A. Kawashima, S. Shoda, T. Momma, K. Kubota

(Japan)

22. 18 A New System for Computer Aided Automation of Different

Commercially Available Partial Discharge (PD) Detectors.

H, Borsi, M. Hartji


22.19 Partial Discharge Behaviour of an Epoxy Resin Filled with

Si laned Quartz Powder.

M. Beyer, E. Lindwedel


22. 20 Some Aspects of Basic Investigations for Acoustical Partial

Discharge (PD) Detection and Location in Cast Epoxy Resin

Coils.

M. Beyer, H. Borsi, O. Cachay


22.21 Swarming Pulsive Microdischarges and Internal Partial

Discharge Degradation in Epoxy Resin.

Masayuki Nagao, Masamitsu Kosaki, Takahiro Ishida,Yukio Mizuno

(Japan)

22.23 Errors in Measuring Short High Voltage Impulses.Martti Aro, Pekka Valve,iiroinen Jukka Piiroinen Jukka

(Finland)

22. 24 The Effect of Surface Imperfections on the Breakdown

Strength of SF6 Under Very Fast Transients.

G. L, Van Der Zel, J. P. Reynders

(South Africa)

22.25 Field Distribution of Spark Gap with Wedgy Electrodes and

Containing Dielectric Surface.

Jia Wang, Pai S. T.

(P,R. of China)

22.26 The Switching Characteristics of Mi dp lane-Triggered Spark

Gaps.

Naixiang Ma, Huimin Deng, Hong Tang


22.27 Jitter Studies of Gas Insulated Field-Distortion Spark Gaps.

Deng Jianjun, Tao Zuchong, Zhang Shouyun, Zhang Enguan,

Hu Senzhong

(P.R. of China)

22.28 Electrodeless Flashover Discharges in the Insulation of

High-Voltage Gas-Insulated Bushings,

V. Akimov, A. Panov, D. Podgornov

(Soviet Union)

SESSION 23 - Gas Insulated Systems

Chairman: Dr. Frank Chu

Ontario Hydro

Toronto, Ontario, Canada

23.02 Monitoring of GIS at Ultra High Frequency.D, Light le, B. Hampton, T. Irwin

(Great Britain)

23.03 The Choice of Swarm Parameters for Avalanche Studies.

J, M. Wetzer, C. Wen

(Netherlands)

23.04 Electrical Field on Rough Electrode Surfaces and its

Influence on the Statistical Properties of SF6 Breakdown.

T, Dunz, B. Fruth, L. Niemeyer, L. Ullrich, K. Diederich

(Switzerland)

23.05 The Influence of Test Flashovers on the Insulation Strengthof Spacer Surfaces in SF6 Gas Insulated Substations.

D, Darwanto, H. C. Karner, R. Schwarz


23.06 The Effect of Surface Roughness of Machined Electrodes on

Breakdown in SF6.

Ma Sen, Li Yi, Li Shuwen

(P.R. of China)

23.07 Acoustic Detection, Localization and Identification of

Anomalies in GIS.

B, H. E. Wahlstrom, W. S. G. Lord, P. E. Hoff, P. 0. Karrvall,M. A. S, Leijon

(Sweden)

23.08 Production and Stability of S2F10 in SF6 Corona Discharges.I, Sauers, M. C. Siddagangappa, G. Harman, R. J. Van Brunt,J. T. Herron


23.09 Comparison Between V.F.T. and Lightning Impulse Breakdown

Voltages for GIS Insulation in Presence of Defects on

Live-Conductors.

G. Riquel, Z. Y. Ren, L. Lefroncois

(France)

23. 10 Critical GIS Configurations with Respect to VFT.

W. Boek, R. Witzmann


SESSION 24 - Field Calculationsand Measurements

Chairman: Dr, George Gela

Ohio State UniversityColumbus, OH, U.S.A.

01 Charge Simulation Method with Additional Charge Systems.Jurgen Hamscher, Paul Weiss


02 Numerical Computation of Electric Field and Optimal Designof Three-phase Enclosed CGIC.Y. M. Li, Y. Qiu, L. L, Li, G. S, Jiang, E. Kuffel(P.R. of China)

03 Enhancement of the Charge Simulation Method for Fast and

Stable Computation of Three-dimensional Electric Fields.A. Nourai, V. I. Kogan(United States of America)

04 Comparison of the Boundary Conditions for Bipolar DC CoronaField Calculation.

Nobuhiro Fujioka, Kenji Arai

(Japan)

05 Development of Computer Program for Modeling of MagneticFields in High Voltage AC Substations.

Donald G. Kasten, Stephen A. Sebo, Ross Caldecott


06 High-Voltage Field Calculation by Discrete Simulation.

G. Praxl

(Austria)

07 Finite-Element Modelling of Dry-Zone Formation on Polluted

Outdoor High Voltage Insulators.

B. C. Gellert, J. K. Rasmussen

(Denmark)

06 Finite Element Program in Transformer Research.

Fei Zengyao, Tang Yan

(P.R. of China)

09 Comparative Analysis of the Boundary Element Method and the

Charge Simulation Method in the 2D and 3D Electrostatic

Field Calculation.

Z. Andjelic, B. Krstajic, S. Milojkovic, H. Steinbigler,H. Hiesinger


10 Venus - A Distributed Software Environment for Numerical

Field Calculation,

A. J. Schwab, P. F. Deistr, B. J. Schaub, H, L. Singer,

F. E, Gutfleisch, H. Steinbigler


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