基于行波时差矩阵算法的10kV电缆网络故障定位

城市电缆网络产生故障时,故障线路的精确辨识及故障点的准确定位有利于快速恢复供电。针对城市电缆多埋于地下、结构复杂、分支多、传统定位算法较为繁琐等问题,在有效分析电缆线路结构与行波传播路径的基础上,提出了一种基于行波时差矩阵算法的多分支电缆线路故障定位方法。该方法首先划分线路的各个区段,然后根据线路网络拓扑结构与行波传播路径构建故障判定矩阵,最终依据故障判定矩阵与双端行波定位原理准确定位故障点。PSCAD仿真结果表明,该方法能快速精确地判定故障分支并定位故障点。

Fault Location of 10 kV Cable Network Based on Traveling Wave Time Difference Matrix Algorithm

When the urban cable network fails, the accurate identification of the fault lines and the accurate location of the fault point are conducive to the rapid restoration of power supply. In view of the buried underground urban cables, complex structure, many branches, the traditional location algorithm is cumbersome. Based on the effective analysis of cable structure and traveling wave propagation path, a fault location method for multi-branch cable lines based on traveling wave time difference matrix algorithm is proposed. Firstly, the method divides each area of the lines, and then constructs the fault judgment matrix according to the line network topology and traveling wave propagation path. Finally, the fault points are located accurately according to the fault judgment matrix and the principle of two-terminal traveling wave location. The PSCAD simulation results show that the method can quickly and accurately determine the fault branch and locate the fault point.