Research on the Method of CHB DC Side Free Power Supply in Flexible Control and Distribution of Ground Fault Current in Distribution Networks

In response to the problem of ground fault current control in traditional power distribution networks, a flexible control method for ground fault current in distribution networks based on two-phase direct mounted equipment is proposed. The main features of this method include simplified equipment structure, power free, vertical principle of voltage and current, soft grid connection, and charging control principles. The feasibility of this method was verified through Matlab simulation. This provides new ideas for improving the stability and reliability of the power system.