输电线路用带外串联间隙避雷器绝缘配合性能研究  

Insulation Coordination Performance of Externally Gapped Line Arresters for Transmission Lines

作　　者：熊易[1] 王保山[1] 左中秋[1] 雷晓燕[1] 汤霖[1] 

机构地区：[1]中国电力科学研究院,武汉430074

出　　处：《高电压技术》2014年第5期1399-1406,共8页High Voltage Engineering

基　　金：国家电网公司科技项目(GY71-12-028)~~

摘　　要：为比较国内外带外串联间隙避雷器（EGLA）标准的差异并验证国内EGLA的性能,参考国内外相关标准要求,结合中国电力系统特点,对输电线路中使用较多的110～500 kV系统中常用EGLA的绝缘配合、耐受性能等进行了计算、试验研究。试验结果表明,该系列设计侧重于满足EGLA与其并联安装绝缘子之间的绝缘配合性能要求,而其耐受性能,尤其是避雷器本体故障之后的耐受性能相对较差;其3‰概率操作冲击击穿电压比DL/T620—1997中规定的操作冲击耐受电压值低18.0%～31.6%。因此,建议在制订中的EGLA国家标准里,结合中国线路特点,对EGLA的耐受性能提出明确要求,使EGLA的选型更加合理。To compare the Chinese standards of externally gapped line arresters（EGLA） with their counterparts in other countries, and to assess the EGLA designs in China, referring to relevant standards from worldwide and taking the characteristics of Chinese electric power systems into consideration, we tested and calculated the insulation coordination, tolerance performance, and energy handling capability of a typical Chinese 110～500 kV design of EGLA. The results show that the typical Chinese design focuses on meeting the requirements of insulation coordination between EGLAs and their insulators installed in parallel, but it has relatively weak withstanding ability, especially in fault occasions. The breakdown voltage of 3‰ probability under switching impulse of the typical design is lower than the withstanding voltage under switching impulse prescribed in DL/T 620—1997 by 18.0%～31.6%. Therefore, it is suggested that, in the formulated Chinese standards, requirements of EGLA＇s overvoltage withstanding ability need be added according to Chinese electric power system＇s characteristics so as to reasonably select EGLA.

关 键 词：线路避雷器 串联间隙 绝缘配合 耐受性能 避雷器本体元件故障 过电压 

分 类 号：TM863[电气工程—高电压与绝缘技术]