基于双端定位的电缆中间接头局部放电检测与应用

Partial discharge detection and application of cable intermediate joint based on two-terminal location

高压电缆线路中间接头绝缘故障导致设备发生非计划停运的事故时有发生,而故障前接头内部往往会伴随出现局部放电信号,及时发现并处理导致局部放电信号产生的因素是预防电缆绝缘故障的关键。为此,本文介绍一种基于双端定位的电缆中间接头局部放电检测方法,能够解决常用的电缆局部放电检测方法在实际检测时难以定位局放信号源的问题,为高压电缆状态检测提供了很好的技术支撑手段。

There often appeared unplanned outage event that resulted from the insulation failure of high - voltage ca- ble intermediate joint, while, the internal discharge signal often occurs inside the joint before the fault. Therefore, it is key for cable insulation fault prevention to immediately detect and solve the factors that cause the partial dis- charge signal. For this reason, a partial discharge detection method of cable intermediate joint based on two - ter- minal location is introduced in this paper, which is able to solve the problem that the commonly used cable partial discharge detection method can not locate the partial signal source at the time of actual detection. The method pro- vides a good technical support means for high -voltage cable state detection.