Abstract:An effective way is provided by the electric-hydrogen hybrid energy storage to improve the reliability of islanded DC microgrids. However,the reliability level of the system will also be affected by different electric-hydrogen hybrid energy storage strategies. According to different operation sequences of electric-hydrogen hybrid energy storage,the impact of three energy storage strategies on the reliability of islanded DC microgrid is compared and analyzed. Firstly,the hydrogen storage model,battery storage model and microgrid reliability evaluation index system are established. Then,considering the fault of system components,based on the sequential Monte Carlo method,a reliability evaluation method of islanded DC microgrid considering electric-hydrogen hybrid energy storage is proposed. Finally,the improved RBTS BUS6 F4 feeder system is applied to evaluate the reliability of the islanded DC microgrid,and the influence of different energy storage strategies and different capacities of electric-hydrogen hybrid energy storage on the system reliability are compared and analyzed. The results show that system reliability can be effectively improved with hydrogen energy storage. Different electric-hydrogen energy storage strategies and capacities have different effects on system reliability.