Analysis and treatment of above-norm leakage current on 220 kV lightning arresters of Taishan Power Plant
Jian Zhang · Guangdong Electric Power · 2005
To counteract the above-norm leakage current tested on live 220 kV lightning arresters of Taishan Power Plant, and in light of the infrared thermal imaging photographs of arresters and the fact that the plant is located in coastal area with a pollution degree of IV, the cause of the leakage current as well as its harm to arresters are analyzed theoretically in this paper.It is indicated that the high-salinity pollutants on the arresters are the main cause of the problem. Based on the analytical result,treating and precautionary measures are presented as well.