基于局部放电信号提取的变压器绝缘能力在线评价与预警

Transformer insulation capability online evaluation and early warning based on partial discharge signal extraction algorithm

先用小波阈值消噪法减少信号模极大值点数量,再用标准局放信号模极大值点分布约束条件对信号进行检验,满足约束条件则作为局放信号进行保留,否则去除。本文方法对变压器绝缘能力提供量化的结果,为运行和维护人员提供更为直观展示方式。

First use of wavelet threshold de-noising method to reduce the number of the signal modulus maxima points,then the standard PD signal modulus maxima point distribution constraints on the signal test, satisfy the constraints are retained as a partial discharge signal,or removal.Experimental results show the effectiveness of the method.