一起220kV避雷器缺陷分析

Analysis of a 220 kV Lightning Arrester Defect

2016年6月17日,试验研究所在在线监测中发现220kV海埂变110kV海柳Ⅲ回线路A、B相避雷器阻性电流和本体温度相对C相增长较大,220kV海埂变110kV海柳Ⅲ回线路PB评价为异常,设备风险评估为Ⅲ级风险.2016年6月23日,220kV海埂变110 kV海柳Ⅲ回线路避雷器A、B相绝缘电阻和直流泄露电流试验不合格.

On June 17,2016,the test institute found in the online monitoring of 220 kV Haili substation 110 kV Hailiu III circuit A,B phase arrester resistance current and body temperature increased relatively to phase C,220 kV Haili substation 110 kV The PB evaluation of the Hailiu III circuit was abnormal,and the equipment risk assessment was Grade III risk.On June 23,2016,the 220 kV Haili Substation 110 kV Hailiu III circuit arrester A and B phase insulation resistance and DC leakage current tests failed.