电力系统保护与控制2018，Vol.46Issue(8)：103-109,7.DOI:10.7667/PSPC170591
基于潮流计算的直流配电网单极接地故障定位算法
A fault location algorithm for the single-pole-to-ground fault of DC distribution network based on power flow calculation
徐铭铭 1王鹏 1高明春2
作者信息
- 1. 国网河南省电力公司电力科学研究院,河南 郑州 450052
- 2. 江苏大全长江电器股份有限公司,江苏 镇江 212211
- 折叠
摘要
Abstract
This paper presents an algorithm of locating single-pole-to-ground faults in DC distribution network based on power flow calculation. The fault current feature flowing through fault point is analyzed, implying the pole-to-ground voltage at the fault point of fault pole is almost zero when the transient process ends. Given this precondition, the distribution of residual voltage of each measuring point in fault pole can be calculated with the load current, which is obtained by power flow calculation. By comparing the similarity between the distribution and the measured residual voltage distribution in real fault, the node which makes the maximum similarity is identified to be closest to the real fault point. An impedance-based method is applied further to calculate the accurate location of fault point. Simulation model is established based on Matlab/Simulink, and the test results demonstrate the validity of proposed algorithm.关键词
直流配电网/故障定位/潮流计算/单极接地故障/残余电压分布Key words
DC distribution network/fault location/power flow calculation/single-pole-to-ground fault/residual voltage distribution引用本文复制引用
徐铭铭,王鹏,高明春..基于潮流计算的直流配电网单极接地故障定位算法[J].电力系统保护与控制,2018,46(8):103-109,7.
