摘要
通过在辐射型多分支配电网络配置微型同步相量测量单元(μPMU),提出了一种基于μPMU同步量测数据的配电网故障定位方法。该方法首先通过单端μPMU电压、电流同步相量求取初始故障距离。然后,根据双端μPMU电压、电流同步相量排除伪故障点,迭代确定故障在主网络上的具体位置,通过与初始故障距离比较,判断故障发生在主网络还是分支线路上。最后,通过伪故障点的迭代排除,确定分支上故障到主网络的距离。该方法考虑了线路电容对故障定位精度的影响,通过线路对地电容分析,减小了定位误差。仿真结果验证了该方法的有效性。
In this paper, a fault location method for distribution network based on synchronous measurement data of μPMU is proposed by configuring micro synchronous Phasor Measurement Unit(μPMU) in radial distribution network. Firstly, the initial fault distance is calculated by synchronous phasor of voltage and current of single-ended μPMU. Then, the pseudo-fault points are eliminated according to synchronous phasor of voltage and current of double-ended μPMU, and the specific location of the fault in the main network is determined iteratively. By comparing with the initial fault distance, the fault occurs in the main network or in the branch line is judged. Finally, the pseudo-fault points are eliminated iteratively, and the distance from fault to main network is determined. This method considers the influence of line capacitance on fault location accuracy. Through the analysis of line capacitance to ground, the location error is reduced. The simulation results verify the effectiveness of this method.
作者
葛维春
张硕
张艳军
李铁
李江
高凡
李国庆
魏文震
GE Weichun;ZHANG Shuo;ZHANG Yanjun;LI Tie;LI Jiang;GAO Fan;LI Guoqing;WEI Wenzhen(State Grid Liaoning Electric Power Co.,Ltd.,Shenyang 110006,China;School of Electrical Engineering,Northeast Electric Power University,Jilin 132012,China;Linyi Power Supply Company,State Grid Shandong Electric Power Company,Linyi 276000,China;Zibo Power Supply Company,State Grid Shandong Electric Power Company,Zibo 255000,China)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2020年第4期39-46,共8页
Power System Protection and Control
基金
国家电网公司基金项目资助(5222LK17001T)~~
关键词
配电网
μPMU
对称分量法
故障分量
故障定位
distribution network
μ PMU
symmetrical component method
fault component
fault location
