配电自动化系统中单相接地故障定位新方法  

A New Location Method of Single Phase to Earth Fault in Distribution Automation System

作　　者：马天祥[1] 程肖 杜旭浩[1] 魏力强[1] 古海峰[1] 

机构地区：[1]国网河北省电力公司电力科学研究院,河北石家庄050000 [2]河北省送变电公司,河北石家庄050000

出　　处：《陕西电力》2016年第8期67-70,75,共5页Shanxi Electric Power

摘　　要：我国中低压配电网以架空线为主,大多采用小电流接地系统,故障类型主要为单相接地故障,一旦发生故障很难确定故障位置。通过分析小电流接地系统单相接地故障信息,提出基于方向信息值的寻子定位法。PSCAD/EMTDC仿真和挂网测试表明:该方法能够准确定位故障发生区段,方便线路维护人员寻查故障点,有利于实现集中型馈线自动化。The low voltage distribution network in our country is given priority to overhead lines, which mostly uses the small current grounding system. The fauh is mainly single phase grounding fault, and it is difficult to determine the fault location. Through analyzing the single phase to ground fault information of small current grounding system, fault location searching method based on the concept of value point direction information is put forward. PSCAD/EMTDC simulation and net tests show that the method can accurately locate fault section,is convenient to search point failure for route maintenance staff, and is also conducive to realize centralized feeder automation.

关 键 词：配电网 小电流接地 配电自动化 方向信息值 故障定位 

分 类 号：TM734[电气工程—电力系统及自动化]