Identification Method for Single-line-to-ground Faults with Line Break Based on Phasor Measurement in Distribution Networks

作     者：Yadong Liu Zichang Li Yingjie Yan Guanghui He Jian Fang Kejun Li Xiuchen Jiang Yadong Liu;Zichang Li;Yingjie Yan;Guanghui He;Jian Fang;Kejun Li;Xiuchen Jiang

作者机构：Institute of Intelligent Power Transmission and Distribution.Shanghai Jiao Tong UniversityShanghai 201100China Electric Power Test Institute of Guangzhou Power Supply Bureau Co.Ltd.Guangzhou 510420China IEEE 

出 版 物：《Journal of Modern Power Systems and Clean Energy》 (现代电力系统与清洁能源学报（英文）)

年 卷 期：2023年第11卷第3期

页      面：907-916页

核心收录：

学科分类：0808[工学-电气工程] 080803[工学-高电压与绝缘技术] 08[工学] 

基　　金：supported in part by National Science Foundation of China(No.51707117)。 

主　　题：Distribution network phase measurement unit single-line-to-ground fault(SLGF) identification method influencing factor 

摘      要：The single-line-to-ground faults with line breaks(SLGFs-LBs)occur more and more frequently in distribution networks and can cause major safety accidents.It is difficult to distinguish the single-line-to-ground faults(SLGFs)in resonant grounding systems and ungrounding systems due to the same electrical characteristics on the source side and uncertain operation conditions of distribution networks.This paper proposes a method for distinguishing SLGFs-LBs and SLGFs.First,the source-side and load-side voltage characteristics of SLGFs and SLGFs-LBs are analyzed,and the phase difference between the voltages of the fault phase and non-fault phase on the load side is selected as the identification criterion.Phasor measurement units(PMUs)are selected as measuring devices.Then,the effects of operation conditions and external devices in distribution networks on the proposed method are discussed,and the phase errors caused by them are calculated to correct the identification method.Finally,the field testing and simulation experiments are conducted to verify the effectiveness and robustness of the proposed method.