摘要
在总结大量文献研究成果基础上 ,从闪络特性和机理等方面分析了覆冰绝缘子直流闪络的各种影响因素。结果表明 :闪络电压与覆冰类型、覆冰水电导率、覆冰量及气压等有关 ;长串的直流闪络梯度较短串小 ,闪络频率与电压梯度成正比 ;闪络是由持续、高幅值的泄漏电流融化冰层所致。并提出了覆冰绝缘子闪络特性方面亟待研究的课题。
Based on references, the flashover performance and mechanism of external insulation of high voltage transmission lines in special conditions are analyzed and summarized in this paper. It analyzes the factors which affect the flashover voltage of iced insulators, and summarizes its flashover mechanism systematically. It is indicated that the flashover voltage of iced insulators is related to icing type, the conductivity of icing water, the ice amount, the air pressure and so on; and the DC flashover voltage gradient of a longer insulator string is lower than shorter one, the flashover frequency is linear with voltage gradient; and the flashover of iced insulators is caused by melted ice with the continuous and high amplitude leakage current. Finally it puts forward the problems in flashover performance of iced insulator which have to be studied at present.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2004年第1期16-18,共3页
High Voltage Engineering
