开关柜局部放电检测定位技术的应用研究

摘要

介绍了对开关柜局部放电暂态对地电压法和超高频法检测定位技术，对超高频电磁波在开关柜中的传播特性进行了理论分析。在实际运行10 kV开关柜中研究了暂态对地电压法和超高频法局部放电定位技术的有效性和可行性。结果表明：采用暂态对地电压法，超高频检测幅值比较和时间差法的局部放电定位技术对开关柜局部放电缺陷的检测和定位是有效可行的。高压开关柜局部放电暂态对地电压法和超高频法检测定位技术可为现场应用提供实验基础。%This paper introduces transient voltage to ground method and ultrahigh frequency detecting and positioning tech-nology for partial discharge of switch cabinet and carries out theoretical analysis on spread characteristics of ultrahigh fre-quency electromagnetic wave in switch cabinet.In practical operation of 1 0 kV switch cabinet,it studies effectiveness and feasibility of transient voltage to ground method and ultrahigh frequency PD positioning technology.The result indicates that it is effective and feasible to use transient voltage to ground method and ultrahigh frequency to detect amplitude comparison and PD positioning technology based on time difference method to realize detection and positioning for PD defects of the switch cabinet.Transient voltage to ground method and ultrahigh frequency detecting and positioning technology for PD in high voltage switch cabinet is useful to provide experimental basis for the scene.