现场局部放电试验中干扰源的识别和采取的对策

Identification and countermeasures for interference source at site of partial discharge test

局部放电试验是检测固体绝缘中存在气泡和裂纹等缺陷最有效的手段,局部放电又是个弱电现象,现场进行局部放电试验极易受各种干扰的影响。文章详细分析了常见的干扰源类型和形成途径以及各种干扰波形放电特征、显示位置和随施加电压变化规律,并对各种干扰采取有效对策,将干扰抑制在合理的数值范围内,以保证局部放电试验顺利进行。

The partial discharge test is the most effective means to check the defects of the existing bubbles and cracks and so on in solid insulators, it is also a weak electricity phenomenon which is liable to various interference. This paper details the interference sources and forming channels, as well as various discharge characteristics of the interference wavefonm, displaying positions and the laws of changes under applied voltages, And it expands the effective countermeasures to suppress the interference or contain the interference within reasonable limits, ensuring the smooth progress of the partial discharge test.