直流微电网故障定位研究综述  

Research Overview on Fault Location for DC Microgrid

作　　者：陈皓[1] 田新和 高传薪 郑思琦 闫重熙 CHEN Hao;TIAN Xinhe;GAO Chuanxin;ZHENG Siqi;YAN Chongxi(College of Electrical Engineering and Information Technology,Sichuan University,Chengdu,Sichuan 610065,China)

机构地区：[1]四川大学电气信息学院

出　　处：《广东电力》2019年第7期44-51,共8页Guangdong Electric Power

摘　　要：综述了国内外直流微电网故障定位的研究现状。首先,分析了直流微电网故障定位的基础,指出直流微电网接地方式的选取和故障特征分析对故障定位的重要性。之后,对现有直流微电网故障定位原理进行归类研究,将直流微电网故障定位方法分为注入信号法和故障分析法,指出:各类算法均有优缺点;注入信号法适用于离线故障定位,故障分析法适用于在线故障定位,2种定位方法的准确性均受过渡电阻影响大;现有故障定位算法无法同时对单极接地故障和极间短路故障进行定位,且制约其定位准确性的因素多。最后,指出直流微电网故障定位面临的关键问题,并对未来直流微电网故障定位进行展望。This paper summarizes research status of fault location for the DC microgrid at home and abroad. It firstly analyzes foundation of fault location for the DC microgrid and points out importance of selection of grounding mode and analysis on fault characteristic for fault location. Then it classifies and studies current fault location principles, divides the fault location methods for the DC microgrid into the injection signal method and the fault analysis method, and points out advantages and disadvantages of different methods. The injection signal method is suitable for offline fault location while the fault analysis method is suitable for online fault location, but accuracy of these two methods are greatly affected by transition resistance. Current fault location algorithms can not locate pole-to-ground fault and pole-pole fault at the same time and there are many factors restricting location veracity. Finally, it points out key problems in fault location for the DC microgrid and makes prospects for future fault location for the DC microgrid.

关 键 词：直流微电网 故障定位 接地方式 故障特征 注入信号法 故障分析法 

分 类 号：TM744.3[电气工程—电力系统及自动化]