LXY4-160型绝缘子串覆冰操作冲击闪络特性  

Flashover Performance of Ice-covered LXY4-160 Insulator Strings Under Switching Impulse

作　　者：董冰冰[1] 蒋兴良[1] 盛道伟 向泽[1] 黄俊[1] 袁耀[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]西南电力设计院,成都610021

出　　处：《高电压技术》2013年第1期54-59,共6页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724501;2009CB724502);国家创新研究群体基金(51021005)~~

摘　　要：为丰富目前较少的操作冲击电压作用下绝缘子冰闪特性研究,以7片串LXY4-160型绝缘子串为试品,在大型多功能人工气候室内研究了清洁干燥、淋雨、覆冰条件下玻璃绝缘子串的操作冲击闪络特性。结果表明,玻璃绝缘子串操作冲击冰闪电压比其清洁干闪和雨闪电压有明显下降;LXY4-160型玻璃绝缘子串操作冲击50%闪络电压U50随覆冰水电导率的增加而降低;正极性U50和负极性U50均随覆冰质量的增加而降低。根据试验结果,得出了覆冰质量、覆冰水电导率对覆冰绝缘子串操作冲击50%闪络电压影响的关系式,并综合考虑了覆冰质量和覆冰水电导率的共同影响,得出了其冰闪电压的计算公式。利用提出的计算公式所得计算结果与试验值的偏差在工程应用允许的误差范围内。To enrich the research content of ice-covered insulator flashover characteristics under switching impulses,we experimentally investigated seven units LXY4-160 glass insulator strings in a large multi-function artificial climate chamber under various conditions including dry,raining and ice-covered.Conclusions are drawn as follows： the 50% switching impulse flashover voltage of glass insulator strings under ice conditions remarkably decreases compared with that under dry or rainy conditions;the 50% switching impulse flashover voltage U50 of LXY4-160 glass insulator strings decreases with the increase of icing water conductivity;the positive voltage U50 and negative voltage U50 also decrease with the increase of ice amount.According to test results,the relationships between the 50% flashover voltage U50 and ice amount as well as icing water conductivity are obtained,respectively.Moreover,a calculation formula of U50 is also obtained in consideration of icing amount and icing water conductivity.It is proved that the deviations between test results and calculation results according to the correction formula are allowable in engineering applications.

关 键 词：覆冰 绝缘子 覆冰质量 覆冰水电导率 操作冲击 闪络特性 

分 类 号：TM85[电气工程—高电压与绝缘技术]