Research on the Influence of the Location of Single-Phase Ground Fault on the Power Information of Distribution Network

With the increasing power demand, the power system becomes more complex, and the impact of grounding fault on the power system increases gradually. However, there is no proven method to solve the precise fault location in the distribution network so far. Therefore, it is a key prerequisite for fault location to obtain accurate electrical information of the power system when faults occur in different locations. In this paper, a simulation model of grounding fault is established to analyze the change rule of power information after fault occurs at 10 km, 30 km and 50 km. The results show that when the fault location increases, the bus A-phase voltage decreases from 8080 V to 8055 V and then increases to 8503 V. The bus A-phase current decreases from 69.86 A to 53.2 A. The first A-phase voltage of line 1 increases from 7670 V to 8160 V. The head A-phase current of line 1 decreases from 77.73 A to 60.81 A. The first A-phase voltage of line 2 decreases from 7703 V to 8160 V. The A-phase voltage at the head of line 2 increases from 7703 V to 8225 V. The A-phase current increases from 8.84 A to 8.99 A. The voltage and current at the load end of line 1 and 2 are less affected by the fault location due to the isolation of transformer. The fault location has a significant impact on electric information