振荡波技术在高压XLPE电缆局放检测中的分析及应用

摘要

In order to improve the accuracy of XLPE cable partial discharge detection.This paper introduces the OWTS theory in XLPE cable partial discharge detection,analyzes TDR PD determination method.This paper also discusses the good equivalence of XLPE cable PD of OWTS and 50Hz power frequency and introduces function and application of the OWTS HV250 equipment.Based on the OWTS data of XLPE cable of Beijing,proves OWTS HV250 can effectively detect and locate different types of XLPE cable PD.Then points out the PD of the cable near end is greatly influenced by environmental disturbance.%为提高高压XLPE电缆的局放检测准确性，对局放进行精确定位，本文介绍了振荡波技术进行XLPE电缆局放检测的原理，分析了该技术基于TDR时域反射的局放判断方法，论述了振荡波电压下与工频运行电压下XLPE电缆局放的良好等效性。重点介绍了北京市电力公司最新引进的适用于高压XLPE电缆的OWTS设备的系统结构功能及使用，通过对北京市高压电缆现场振荡波局放测试数据的分析，验证了振荡波技术能够有效的发现并定位对110kV、220kVXLPE电缆的不同类型缺陷局放，并指出振荡波技术针对近端电缆终端局放判断受环境干扰影响过大的问题。