Abstract: With the integration of high penetration distributed generation into the power grid, higher requirements have been put forward for power supply recovery in distribution network fault scenarios. Studying distribution network fault recovery can improve the reliability and stability of distribution systems. As an important method for quickly restoring power supply, reclosing, combined with the low-voltage ride through characteristics of DG in the time domain, can effectively reduce the disconnection rate of DG; In fault scenarios, the load transfer and voltage support function of soft open point can improve the utilization efficiency of new energy while ensuring user power supply. This article proposes different fault recovery schemes for both sides of the fault location, and finally proves the correctness and feasibility of the proposed fault recovery scheme by building a simulation model on the MATLAB/Simulink simulation platform.

Key words: distributed generation (DG), distribution network fault recovery, low voltage ride through (LVRT), soft open point (SOP)