配电网直流定位法探测器的研究与实现

摘要

在配电网单相接地故障定位中,由于水泥杆接地故障的存在以及导线分布电容的影响,使得C行行波法和交流注入法不能有效定位。直流定位方法是在停电离线状态下,向故障相注入直流信号,然后手持直流信号检测器沿线路检测该直流信号,确定故障点的具体位置。文中对直流信号探测器的原理与组成进行了阐述,并对直流信号的注入进行了仿真。仿真结果表明,该方法是有效、可行的。%In distribution network fault location,the existence of the cement pole earth fault and the effect of wire distribution capacitance make it difficult to locate by the C type traveling wave method and the AC signal injection method.DC signal injection method works in time of line power failure,by which a DC signal is injected into the fault for the maintenance personnel to detect the DC signal by holding a DC signal detector along the road to determine the specific location of the point of failure.The principle of the DC signal detector and composition are described,and the injection of the DC signal is simulated.Simulation results prove the feasibility of our method.