500kV避雷器缺陷分析及其应对措施

Analysis on 500 kV Arrestor Defects and its Counter-measure

阐述金属氧化物避雷器的结构特点和工作原理,以500 kV东莞站#3主变变高C相避雷器和500 kV鹅博甲线线路A相避雷器两起避雷器故障为例,分析这种避雷器缺陷产生的原因,提出预防和及早期发现避雷器缺陷的应对措施。

The structural particulars and working principle of zinc-oxide arrestor is formulated. With the defects found in the 500 kV E-BO circuit I phase A arrestor and that of Transformer #3 HV-side arrestor in 500 kV Dongguan substation as examples, the reason that caused these defects is analyzed. Counter-measure for detecting and preventing these defects in advance is put forward.