直流盘形悬式瓷绝缘子铁帽采用锌环防电解腐蚀特性的试验研究  

Experimental Research on Anti-Electrolytic Corrosion Characteristics of Insulator Cap for DC Porcelain Cap and Pin Insulator by Zinc Collar

作　　者：高理迎[1] 孙涛[1] 赵江涛[1] 魏杰[2] 周军[2] 王洪[2] 

机构地区：[1]国家电网公司,北京市西城区100031 [2]中国电力科学研究院,北京市海淀区100192

出　　处：《电网技术》2013年第12期3381-3385,共5页Power System Technology

摘　　要：随着我国特高压直流工程的大规模建设,直流盘形悬式瓷绝缘子的安全稳定运行日益重要。在直流电流的作用下,绝缘子铁帽势必发生电解腐蚀,这成为影响其机械特性的关键因素,因此,防治绝缘子铁帽的电解腐蚀问题必须加以明确。介绍了铁帽的电解腐蚀机制,概述了我国2条?800 kV直流线路发生直流绝缘子铁帽锈蚀的基本情况,提出了2种防腐锌环的设计方法,并通过试验验证了它们具有良好的防腐蚀性能。研究结果可为直流盘形悬式瓷绝缘子铁帽的防腐蚀设计提供参考。Along with large-scale construction of UHVDC power transmission projects in China, the secure and stable operation of DC porcelain cap and pin insulator becomes more and more important. Under the affect of DC current the electrolytic corrosion of insulator cap is inevitable, and it becomes the key factor impacting the mechanical characteristic of DC porcelain cap and pin insulator, thus it is necessary to make the anti-electrolytic corrosion of insulator cap explicit. The electrolytic corrosion mechanism of insulator cap is presented and the summary of basic situation of DC insulator cap corrosion occurred in two ＋800kV DC transmission lines in China is given, and the design method of two kinds of zinc collar for anti-electrolytic corrosion is proposed and through testing it is validated that the two kinds of the designed anti-corrosion zinc collars possess good anti-corrosion performances. The research results are available for reference to the anti-corrosion design for insulator cap of DC porcelain cap and pin insulators.

关 键 词：直流输电线路 盘形悬式瓷绝缘子 铁帽 电解腐蚀 锌环 

分 类 号：TM854[电气工程—高电压与绝缘技术]