Smooth Mode Switching Control Strategy for Flexible Interconnected Distribution Network

Flexible interconnection is one of the important ways to build a new distribution network. Aiming at the problem of smooth switching of flexible interconnection device (FID) mode in the case of feeder fault in low-voltage distribution network (LVDN) with large-scale distributed generation (DG) access, this paper proposes a switching control method based on inner loop current following. It can greatly suppress the impact of voltage and current and power fluctuation caused by FID in the process of operation mode switching. While fully consuming distributed energy, it also ensures the reliability of emergency power supply of fault feeder connected load. Finally, the effectiveness of the proposed control strategy is verified based on the MATLAB / Simulink simulation platform.