The cold-fog test

被引:56
作者
Chisholm, WA [1 ]
Ringler, KG [1 ]
Erven, CC [1 ]
Green, MA [1 ]
Melo, O [1 ]
Tam, Y [1 ]
Nigol, O [1 ]
Kuffel, J [1 ]
Boyer, A [1 ]
Pavasars, IK [1 ]
Macedo, FX [1 ]
Sabiston, JK [1 ]
Caputo, RB [1 ]
机构
[1] ONTARIO HYDRO,ELECT EXCHANGE,GRID SYST,TORONTO,ON,CANADA
关键词
insulator; flashover; high-voltage testing; contamination; icing fog; temperature;
D O I
10.1109/61.544270
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The electrical performance of outdoor insulation degrades severely during combinations of factors that include surface contamination (C), ice (I), fog (F) and an ambient temperature that rises through 0 degrees C (T-0 degrees). Failures at operating voltage on 115-kV, 230-kV and 500-kV systems occur with increasing probability under these conditions. A new CFT0 degrees or 'cold-fog' test method has been developed to reproduce the flashovers at all three voltage levels. Three options are identified for improving CFT0 degrees performance: use of semi-conductive glazes, substitution of silicone for porcelain and use of silicone coatings on existing porcelain insulators.
引用
收藏
页码:1874 / 1880
页数:7
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