Energy Management Strategy and Simulation Verification of Improved Sliding Mode Hybrid Energy Storage System Based on Rule Control

To solve the problem of power supply delay caused by sudden load change in DC microgrid, a hybrid energy storage system consisting of a fuel cell, battery, and supercapacitor has been proposed. Additionally, a rule-based energy management control strategy for hybrid energy storage systems has also been put forward. Firstly, in order to achieve the reasonable distribution of the load demand power in the hybrid energy storage system, a rule-based method is used to generate their own current reference values, and then an improved asymptotic law sliding mode controller is designed to ensure the stable tracking of the current reference values of fuel cells, lithium batteries and supercapacitors, and maintain the stability of the DC bus voltage of the load. In conclusion, to verify the effectiveness of the proposed energy management control strategy, a DC microgrid hybrid energy storage system was constructed using the MATLAB/Simulink simulation platform.