高压绝缘子沿面放电过程泄漏电流的信号特征

针对目前高压污秽绝缘子闪络风险评估中虚警率高,结果不够准确的现状,本文重点考察了泄漏电流包络线信号的均值,方差,偏度,峰度四项指标和沿面放电状态之间的关系,通过利用求积法实现多个指标信息的综合后发现:综合指标较之各单一指标,在实现闪络风险评估时,可以有效降低虚警误报的风险,因而更加适合去实现闪络风险的综合评判。

Characteristic of HV Insulators' Leakage Current on Surface Discharge

The defects limiting the application of the technology and need solving instantly are that the results are always inexact and have higher false alarm rate in HV contaminated insulators flashover prediction at present.In this paper,the relationship between the surface discharge state and four indexes of leakage current envelope as mean,std,skewness,kurtosis are studied.Through synthesizing the four indexes,the new indexes were developed,which are more suitable for evaluating the flashover risk with lower false alarm rate.