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:
Oral Presentations : HV Measurements-2, Meeting Room 1.43 & 1.44 9
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:
Oral Presentations : HV Measurements-3, Meeting Room 1.43 & 1.44 14
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:
Oral Presentations : HV Measurements-4, Meeting Room 1.41 & 1.42 19
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:
Oral Presentations : HV Measurements-5, Meeting Room 1.41 & 1.42 24
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:
Oral Presentations : Electromagnetic Fields-2, Meeting Room 1.43 & 1.44 71
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:
Oral Presentations : Electromagnetic Fields-3, Meeting Room 1.43 & 1.44 76
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:
Oral Presentations : HV Insulation-2, Meeting Room 1.43 & 1.44 107
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:
Oral Presentations : HV Insulation-3, Meeting Room 1.41 & 1.42 112
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:
Oral Presentations : HV Insulation-4, Meeting Room 1.41 & 1.42 117
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
Wednesday 26 August 2009, 09:00-12:30:
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
Wednesday 26 August 2009, 09:00-10:30:
Oral Presentations : Diagnostics-3, Meeting Room 1.41 & 1.42 174
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
Wednesday 26 August 2009, 11:00-12:30:
Oral Presentations : Diagnostics-4, Meeting Room 1.41 & 1.42 180
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:
Oral Presentations : Diagnostics-5, Meeting Room 1.43 & 1.44 186
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:
Oral Presentations : Outdoor Insulation-2, Meeting Room 1.43 & 1.44 229
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:
Oral Presentations : Outdoor Insulation-3, Meeting Room 1.41 & 1.42 234
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:
Oral Presentations : Outdoor Insulation-4, Meeting Room 1.43 & 1.44 239
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
Wednesday 26 August 2009, 09:00-10:30:
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
xviii
Thursday 27 August 2009, 13:30-15:00:
Oral Presentations : Transients-2, Meeting Room 1.43 & 1.44 325
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:
Oral Presentations : Transients-3, Meeting Room 1.41 & 1.42 330
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
xix
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
xx