小电流接地系统单相断线接地复故障类型诊断  

Diagnosis of single-phase grounding fault with line-broken in small current neutral grounding system

作　　者：王士新 张慧芬[1] 徐斌 魏亚军 刘宗杰 黄坛坛 WANG Shixin;ZHANG Huifen;XU Bin;WEI Yajun;LIU Zongjie;HUANG Tantan(School of Automation and Electrical Engineering, University of Jinan, Jinan 250022, China;Jining Power Supply Company of State Grid Shandong Electric Power Company,Jining 272100,China)

机构地区：[1]济南大学自动化与电气工程学院,山东济南250022 [2]国网山东省电力公司济宁供电公司,山东济宁272100

出　　处：《电力自动化设备》2018年第7期134-139,147,共7页Electric Power Automation Equipment

基　　金：山东省自然科学基金资助项目(ZR2012EEL19);临沂市科技发展计划资助项目(201313018)~~

摘　　要：在考虑负荷性质、中性点接地方式、过渡电阻等因素的条件下,利用复合序网分析了配电线路单相断线接地复故障的故障特征,得出不同影响因素下零序电压的幅值和相位信息变化差别显著的结论,从而提出一种基于零序电压幅值和相位的小电流接地系统单相断线接地复故障类型的诊断判据。PSCAD仿真验证了该判据的有效性。Considering the characteristics of loads,neutral grounding modes and transition resistance,the feature of single-phase grounding fault with line-broken in small current neutral grounding system is analyzed by using the compound sequence network.The analytical results show that the variations of amplitude and phase information of zero-sequence voltage under different influencing factors are obviously different when single-phase grounding fault with line-broken occurs,according to which,a fault diagnosis criteria of single-phase grounding fault in small current neutral grounding system is proposed based on zero-sequence voltage amplitude and phase.PSCAD simulation verifies the correctness of the proposed criteria.

关 键 词：小电流接地系统 单相断线接地复故障 故障类型 零序电压 

分 类 号：TM761[电气工程—电力系统及自动化]