一种含光伏发电的煤矿配电网故障定位方法

Research on Fault Location Method of Coal Mine Distribution Network With Photovoltaic Power Generation

煤矿配电系统是位于电网末端的单端电网。当配电网发生单相接地故障时,故障电流比较弱,因此难以定位故障位置。由于煤矿配电网的分支较多,结构复杂,还有光伏发电接入,因此传统方法无法达到满意的效果。为了解决这一问题,该文提出了一种基于零序电流相位差的故障定位方法,并根据煤矿配电网系统图用MATLAB搭建仿真模型,验证了该方法的可行性。该文也设计了故障信息采集处理系统。该方法将煤矿配电网划分为多个区段,通过无线通信网络将信息传输到中心站,再通过分析零序电流的相位信息和配电网的结构来判断故障区域,不需要附加额外的信号。

Coal mine distribution system is a single terminal power grid located at the end of the power grid.When a single-phase ground fault occurs in the distribution network,the fault current is relatively weak,so it is difficult to locate the fault.Because the coal mine distribution network has many branches,complex structure,and photovoltaic power generation access,the traditional method can not achieve satisfactory results.In order to solve this problem,this paper proposes a fault location method based on zero sequence current phase difference,and builds a simulation model with MATLAB according to the coal mine distribution network system diagram,and verifies the feasibility of the method.This paper also designs the fault information acquisition and processing system.In this method,the coal mine distribution network is divided into several sections,the information is transmitted to the central station through the wireless communication network,and then the fault area is judged by analyzing the phase information of the zero-sequence current and the structure of the distribution network,without additional signals.