Fault Location Method for Distributed Power Distribution Network Based on Hybrid Strategy Genetic Algorithm

Since the access of the distributed power supply of distribution networks changes the structure of original networks and the direction of the power flow, so that the correctness of the relay protection action is reduced. In order to accurately locate the fault when fault occurs, a new positioning method based on hybrid strategy genetic algorithm is proposed. The entire distribution network is segmented according to the distribution of the multifunctional micro phasor measurement unit. Then the line transmission equation and the goodness function model are established, and the known network structure is fault-located by the improved genetic algorithm. The proposed method by using the global information to comprehensively consider the fault condition, avoids the misjudgment caused by the special situation. Considering the influence of the grounding resistance, the accuracy of fault location is greatly improved, and the resistance of the grounding resistor is solved for the first time. Theoretical analysis and a larger number of simulation results show that this method has high precision and stability.