避雷器接线方式对并补电容器组重燃过电压抑制效果分析  

Arrester Connection Modes on Suppression Effect of Restrike Overvoltage in Shunt Capacitor Bank

作　　者：孙友群 余飞宏 杨代勇 矫立新 林海丹 赵春明 SUN Youqun;YU Feihong;YANG Daiyong;JIAO Lixin;LIN Haidan;ZHAO Chunming(State Grid Jilin Electric Power Research Institute,Jilinl30000,China;School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]国网吉林省电力有限公司电力科学研究院,长春130000 [2]西安交通大学电气工程学院,西安710049

出　　处：《电瓷避雷器》2021年第4期140-146,共7页Insulators and Surge Arresters

基　　金：国网吉林省电力有限公司科技项目(编号:2019-27号)。

摘　　要：断路器在投切并联电容器组时,若断路器断口暂态电压高于绝缘耐受电压,会引起断口电弧重燃,产生较严重的过电压,需要使用避雷器抑制过电压。然而避雷器接线方式对过电压的抑制效果影响很大。以吉林省66kV变电站作为研究对象,使用EMTP-ATP仿真研究分析了不同接线方式下避雷器对并联电容器组重燃过电压的抑制效果。研究结果表明,两相重燃过电压会出现更高的相-地、相-相和极间过电压,采用不同接线方式避雷器抑制效果差异较大,因此应当根据绝缘配合需要以及过电压水平合理确定避雷器接线。When the breaker is switching the shunt capacitor bank,if the transient voltage of the breaker’s fracture is higher than the insulation voltage,it would cause the fracture to restrike and produce a severe overvoltage,so it is necessary to use an arrester to suppress the overvoltage.However,the arrester connection modes have a great impact on the suppression effect of overvoltage.One 66 kV substation in Jilin Province is used as the research object,and EMTP-ATP is used to analyze the suppression effect of arresters on the restrike overvoltage of shunt capacitor banks under different connection modes.The research results show that two-phase restrike overvoltage would have higher phase-to-ground,phase-phase,and pole-to-pole overvoltage,the suppression effect of arresters with different connection modes varies greatly.Therefore,the arrester connection should be reasonably determined according to the insulation needs and the overvoltage level.

关 键 词：并联电容器组 投切过电压 重燃过电压 避雷器接线 

分 类 号：TM53[电气工程—电器] TM862