连续方波脉冲下的局部放电测量分析系统

Measurement and analysis system for partial discharge under continuous square pulse voltage

本文对连续脉冲电压下局部放电的测量分析系统进行研究。分析了不同铁芯材料传感器的响应特性,并用小波包对高低频干扰信号的提取方法进行了研究。在此基础上,通过对脉冲电压下局部放电分析,进一步研究各种统计参量的统计方法和特征,并对样本老化时间和统计参量的关系也进行了验证。通过这些研究,表明该系统对脉冲电压下局部放电的提取和统计是有效的。上述工作的开展,为更深入地研究脉冲电压下绝缘老化机理打下了坚实的基础。

In this paper, a partial discharge measurement and analysis system is presented under square pulse voltage. Response of sensors made by different core materials was compared in order to obtain better response at high frequency. Also, wavelet package is used to filter out high and low frequency interference. Furthermore, depending on analysis for partial discharge under pulse voltage, statistical method is discussed to obtain different statistical parameters, and features of statistical parameter have been investigated. In particular, a relationship between aging time and statistical parameter was observed in specimens. The measurement system contributes to study partial discharge under square pulse voltage. These conclusions could be used to further investigate properties of aging under PWM voltage.