高压开关柜局部放电检测及典型局放缺陷分析

高压开关柜局部放电是导致绝缘损坏事故发生的主要原因,局部放电检测是一种常用的在线监测开关柜运行健康状态的方法,该方法有多个不同的类型,每类方法具有不同的优势和不足,选择相对比较困难。该文分析局部放电检测方法的可行性,介绍采用暂态地电压、特高频和超声波进行局部放电检测的方法,详细讨论检测方法的原理、优势和不足,为今后选取合理检测方法提供依据。

Partial discharge of high-voltage switchgear is the main reason of insulation damage accidents.Partial discharge detection is a commonly used method for online monitoring of the health status of switchgear,which can be divided into several different types.Each type of method has different advantages and disadvantages,which is relatively difficult to select in the maintenance process.The feasibility of partial discharge detection method is analyzed.Some common used detection methods.Such as Transient Earth Voltage,Ultra High Frequency,Ultrasonic,are introduced.The principles,advantages and disadvantages of these detection methods are discussed,which provide the basis for selecting reasonable detection methods in the future.