一种配电网单相接地故障判断新方法及其应用  

Novel Detection Method and Its Application for Single Phase Grounding Fault in Distribution Network

作　　者：阙波[1] 陈蕾[1] 邵学俭[1] 

机构地区：[1]国网浙江省电力公司,杭州310007

出　　处：《高压电器》2017年第6期191-196,共6页High Voltage Apparatus

摘　　要：准确判断单相接地故障,是馈线自动化关键技术之一。基于时频谱突变原理,提出了一种利用Daubechies db4-db8小波变换提取突变特征量,运用非定项属性决策原则,进行单相接地故障施行判断方法。开发了相应的智能柱上开关;介绍了实际物理模拟试验结果;某山区配电网变电站的现场试运行表明,单相接地故障判断准确性达到100%,验证了该方法的准确性和实用性。The single phase grounding fault detection is one of the key technologies in distribution feeder automation. A novel spectrum sudden change theory based method for single phase grounding fault detection is proposed, in which the spectrum sudden changes of transient component in zero-sequence current is extracted by Daubechies db4-db8 principle is used to analysis the sudden changes wavelet analysis, and the indefinite properties decision and detect the fault. A new type of smart column switch using this method is deveIoped.The real physical system testing is introduced with curves and data analysis. A real field pilot implement is taken in the feeder lines of a substation in mountain area, which proves the accuracy and success of the proposed method.

关 键 词：配电网故障定位 单相接地故障 频谱突变 物理非定项属性决策 小波 

分 类 号：TM862[电气工程—高电压与绝缘技术]