光储直流微电网系统协调控制策略研究OACSTPCD

In order to better control,manage and use random distributed renewable energy and loads with large demand fluctuations,this paper proposes different control strategies for different converters in the DC micro-grid system,and con-trols the coordinated operation of converters to ensure the stable operation of the system through different control strategies.Meanwhile,a cascaded topology is designed to form a hybrid energy storage system based on the complementary character-istics of super capacitors and batteries,which further improves the stability of the system.The system is divided into mul-tiple operating modes,and the system realizes smooth and stable switching among multiple modes under the proposed con-trol strategy.Finally,a simulation experiment is carried out in MATLAB/Simulink for the output fluctuation and load change of the distributed photovoltaic power supply during operation.The results show that the proposed strategy can effec-tively suppress the DC bus voltage fluctuation of the system and optimize the operation of hybrid energy storage,which im-proves the reliability and stability of the system,and verifies the effectiveness and feasibility of the control strategy.