220kV变电站母线金属氧化物避雷器故障分析

Failure Analysis of Metal Oxide Lightning Arrester for Busbar of 220 kV Substation

金属氧化物避雷器(MOA)因具备良好的非线性伏安特性和通流能力而广泛应用于电力系统中,其长期运行可能会出现发热、绝缘能力下降等缺陷。文章对一起220 kV变电站母线避雷器故障进行了分析,调取故障录波信息,指出了故障原因并提出了相应的预防对策。

MOA(Metal Oxide Arrester)is widely used in power systems because of its good nonlinear volt-ampere characteristics and current-carrying capacity.However,its long-term operation may have defects such as heat generation and reduced insulation performance.A 220kV substation bus lightning arrester was analyzed.Thefault recording information was collected,the cause of the fault was pointed outand corresponding preventive measures were putforward.