Fault Location Method for DC Distribution Network Based on Particle Swarm Optimization

The DC power distribution system has become the most promising power distribution method. However, when the DC distribution line based on the voltage source converter fails, the DC capacitor discharges quickly and the fault current rises rapidly, which is extremely harmful to the system safety, so the fault needs to be removed as soon as possible. Therefore, the fault location technology is of great significance for the safe and reliable operation of the DC distribution network. In this paper, the mathematical model of pole-to-pole short circuit fault and pole-to-ground short-circuit fault in DC distribution network is constructed. The fault equation is constructed for these two faults. The particle swarm algorithm is used for parameter identification, and the fault location is obtained by using double-ended electric quantity. The fault location method is verified on the MATLAB/Simulink simulation platform.