Asymmetric power grid high-resistance grounding line selection method based on resistive current comparison method

The invention relates to an asymmetric power grid high-resistance grounding line selection method based on a resistive current comparison method. When a ground fault occurs in an asymmetric power grid, resistance of a resistance branch is converted into low resistance, a relatively large resistive current is generated in a fault loop, the relation between a resistive component of the zero-sequencecurrent of each feeder line and the resistive current of a resistor branch is detected and compared when a fault occurs, and influence of the asymmetric current in a power distribution network in thefeeder line on grounding fault line selection is eliminated by using a method that the resistive current can only form a loop with the fault feeder line, so high-resistance grounding line selection accuracy of the asymmetric power grid is improved. 一种基于阻性电流比较法的不对称电网高阻接地选线法。在不对称电网发生接地故障时，通过把电阻支路的电阻转换为低电阻，在故障回路产生较大的阻性电流，检测并比较故障时各馈线零序电流阻性分量与电阻支路阻性电流的关系，利用阻性电流只能与故障馈线构线回路的方法排除馈线中配电网中不对称电流对接地故选线的影响，以提高对不对称电网的高阻接地选线准确性。