注入信号式低压直流微网单极接地故障定位方法

Single Pole Ground Fault Location Method for Low-voltage DirectCurrent Microgrids Based on Signal Injection

为了提高低压直流微电网供电的可靠性,提出新的线路故障定位方法。向故障线路注入电流信号,计算出电流衰减频率和故障距离,确定发生故障的具体地点。在MATLAB中搭建故障定位模型,在不同故障电阻与不同故障距离下进行测试,并对测试结果进行详细分析,验证了文中方法的可行性。

In order to improve the reliability of low-voltage direct current(DC)microgrid power supply,a new circuit fault location method was proposed.The current signal was injected into the fault circuit,and the current attenuation frequency and fault distance were calculated,so as to locate the fault.A fault location model was built in MATLAB,and tests were carried out under different fault resistances and fault distances.Furthermore,the test results were analyzed in detail,and the feasibility of the meth‐od was verified.