外部因素引起的避雷器泄漏电流变化特性研究OA

Gapless metal oxide arrester(MOA)is widely used to limit overvoltage and protect electrical equipment and cable sheath from damage due to its unparalleled excellent characteristics.In order to en-sure the reliable operation of MOA,monitoring the leakage current of MOA is the most important means to determine the deterioration state of MOA.Because the change characteristics of MOA leakage current are affected by many random factors,especially external factors can also lead to the change of MOA leak-age current,so that the basis and threshold of MOA deterioration state cannot be quantitatively deter-mined,which seriously affects the effectiveness and correctness of MOA state determination.Based on the MOA state parameter test platform,the author experimentally studied the influence of external factors on the variation of MOA leakage current,and obtained the variation characteristics of MOA leakage total current and resistive leakage current caused by operating voltage fluctuation,ambient temperature and surface pollution.The research results provide important reference for leakage current test method and de-termination threshold.