高压开关柜局部放电检测及定位方法研究

Research of Detecting and Locating Method for HV Switch Cabinet Partial Discharge

局部放电检测是开关柜状态检修的重要手段,局部放电检测方法多样,每种检测方法各有优缺点,检修人员在工作中难以判断何种检测手段更加适合现场需求。通过对开关柜放电损坏过程进行分析,论证了局部放电检测的必要性;通过对开关柜局部放电时产生的变化进行分析,论证了局部放电检测的可行性;通过实例对常见的暂态地电压、特高频、超声波等局部放电检测方法及定位方法的开展过程及优缺点进行分析,为局部放电检测方法的选取提供了参考。

Detecting of partial discharge is an important means of condition-based maintenance for the high voltage switch cabinet.Partial discharge detection methods varied,each of which has its advantages and disadvantages,so maintenance personnel is hard to determine what means of detection is more suitable for site needs.This paper proved the necessity of partial discharge testing by analyzing the electrical damage to the switchgear;it also experimentally analyzed the advantages and disadvantages of the partial discharge detection methods,such as transient earth voltages,ultrasound and ultra high frequency,providing a reference for the method selection.