Journal ArticleDOI
Withstand voltage characteristics of insulator string covered with snow or ice
H. Matsuda,H. Komuro,K. Takasu +2 more
TLDR
In this paper, the authors investigated the characteristics of an insulator string covered with snow or ice and the application of these results to the insulation design and maintenance of a transmission line in a heavy snow area.Abstract:
The authors describe the results of an investigation into the withstand voltage characteristics of an insulator string covered with snow or ice and the application of these results to the insulation design and maintenance of a transmission line in a heavy snow area. It was found that the characteristics of withstand voltage were affected by the specific gravity of snow, the conductivity of water melted from snow, the height of snow, and the ratio of snow-covered length. The lightning impulse flashover voltage of insulator string covered with snow is much lower than that of nonsnow-covered insulator, indicating that the efficiency of lightning protection greatly decreases under snowing conditions. When transmission lines pass through a heavy snow area, an extension of the transmission system fault is feared in 54 and 275 kV transmission lines because the existing insulator string length does not have sufficient dielectric strength for temporary AC overvoltage and switching surge. >read more
Citations
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Journal ArticleDOI
Flashover problems caused by ice build up on insulators
M. Farzaneh,J. Kiernicki +1 more
TL;DR: The number of single-phase faults in the transmission networks in wintertime increases substantially during cold atmosphere precipitation and after ice accretions followed by a rise in air temperature above 0/spl deg/C as mentioned in this paper.
Journal ArticleDOI
Insulator icing test methods and procedures: a position paper prepared by the IEEE task force on insulator icing test methods
Masoud Farzaneh,T. Baker,A. Bernstorf,K. Brown,W. A. Chisholm,C. de Tourreil,J.F. Drapeau,S. Fikke,J.-M. George,E. Gnandt,T. Grisham,Ivan Gutman,R. Hartings,R. Kremer,G. Powell,L. Rolfseng,T. Rozek,D.L. Ruff,D. Shaffner,V. Sklenicka,Raji Sundararajan,Jicheng Yu +21 more
TL;DR: Test methods for evaluating flashover voltage of ceramic and nonceramic insulators under ice, snow, and cold-fog conditions are recommended in this paper, which describes the procedure to be followed at various stages of an evaluation test including preparation of the test object, insulator precontamination, ice and snow deposits as well as voltage applications and flash-over voltage evaluation.
Journal ArticleDOI
AC flashover performance of insulators covered with artificial ice
Masoud Farzaneh,J.F. Drapeau +1 more
TL;DR: In this paper, a field observation of ice accretion on Hydro-Quebec HV insulators was carried out, as well as a laboratory investigation of the AC flashover performance of various types of insulators covered with artificial ice.
Journal Article
Modeling of the ac arc discharge on ice surfaces. Discussion. Authors' reply
TL;DR: In this article, a model for predicting the flashover voltage of ice-covered insulators energized with ac voltage is presented, taking into account the variation of ice surface conductivity as a function of freezing water conductivity.
Journal ArticleDOI
Modeling of the AC ARC Discharge on Ice Surfaces
M. Farzaneh,J. Zhang,X. Chen +2 more
TL;DR: In this paper, a model for predicting the flashover voltage of ice-covered insulators energized with AC voltage is presented, taking into account the variation of ice surface conductivity as a function of freezing water conductivity.
References
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Journal ArticleDOI
Performance of Insulators Covered With Snow or Ice
TL;DR: In this paper, the performance of insulators covered with snow or ice was investigated and it was shown that the AC and DC withstand voltages of snow-covered insulators were characterized by the conductivity of water melted from the snow.
Journal ArticleDOI
Natural contamination test of insulators with DC voltage energization at inland areas
K. Takasu,T. Shindo,N. Arai +2 more
TL;DR: In this article, the results of tests for natural contamination of insulator strings in inland areas are discussed and the application of these results to insulation design for HVDC transmission lines is discussed.
Journal ArticleDOI
Flashover Tests of Insulators Covered with Ice or Snow
TL;DR: Several types of insulator strings covered with ice or snow were tested for ac, dc, and switchings impulse voltages as mentioned in this paper, and reductions of flashover voltage were noted for all voltage types.
Journal ArticleDOI
AC withstand voltage characteristics of insulator string covered with snow
M. Yasui,K. Naito,Y. Hasegawa +2 more
TL;DR: In this paper, the authors investigated the relationship between the withstand voltage and the characteristics of the snow and presented a design example for determining the length of a snow-covered string, which was used to determine the number of holes in the string.
The AC clean-fog test for contaminated insulators
E. A. Cherney,Y. Beausejour,T. C. Cheng,K. J. Lloyd,G. Marrone,J. H. Moran,K. Naito,L. Pargamin +7 more
TL;DR: In this paper, the results of clean-fog tests conducted by eleven task force laboratories on a common suspension insulator, IEEE insulator are summarized and the significant parameters of the clean fog method that influence the fifty per cent flashover voltage are discussed.
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AC flashover performance of insulators covered with artificial ice
Masoud Farzaneh,J.F. Drapeau +1 more