Adaptive Power Coordination Control Strategy for Flexible Interconnection of Low Voltage Distribution Stations

At present, the classical multi terminal flexible DC power coordination control method mainly solves the problem of power transmission and distribution between multiple AC power grids through DC interconnection. It is necessary to propose a multi terminal flexible DC power coordination control method at the distribution side, so as to realize the unlimited expansion connection of the console port at the AC side, and the plug and play of the DC side port equipment, so as to improve the adaptability of the hybrid AC/DC distribution network to the grid connection of large-scale distributed generators and the wide access of DC loads. Therefore, this paper proposes an adaptive power coordination control strategy suitable for the flexible interconnection of low-voltage distribution stations. Considering the rated capacity and AC load of transformer in the station area, the transmission power of converter in the station area is adjusted to realize the balance of load rate in each station area and maintain the stability of DC side voltage and power balance. Finally, the flexible interconnection simulation model of three stations is built based on Matlab/Simulink. The simulation results verify the feasibility and effectiveness of the proposed control strategy.