绝缘子污秽放电声发射信号特征量提取的研究

Research on the Characteristics Extraction of Acoustic Emission Signal from Contaminated Insulator Discharge

绝缘子污秽放电的过程中存在3种不同的放电模式,即电晕放电、局部放电和电弧放电。大量的试验和研究表明绝缘子污秽放电模式与其声发射信号有紧密的关系。3种不同的放电模式下,声发射信号各参数呈现出不同的特点。进行了绝缘子污秽放电试验,获取了大量污秽放电声发射信号试验数据样本。结合试验数据样本,研究3种放电模式下声发射信号的能量、幅值及频率3个特征量的提取方法,并以这3个特征量为基础,实现污秽放电的模式识别。

There are three different modes in the discharge process which include corona discharge, partial discharge and arcing and their characteristics are different. A close relationship is shown between the contamination discharge intensity and characteristics of acoustic emission signals by a large number of tests and studies. Contaminated insulator discharge test was carried out, and a lot of experimental data about acoustic emission signal on contamination discharge was obtained. Based on the experimental data, the extraction method of the characteristics of acoustic emission signals is researched which included energy, the amplitude and frequency. Based on the energy, the amplitude and frequency, the final contamination discharge mode is identified.