计及电-氢混合储能的孤岛直流微电网可靠性评估

电-氢混合储能为提高孤岛直流微电网可靠性提供了有效途径，然而不同电-氢混合储能策略也会影响系统的可靠性水平，文中针对不同电-氢混合储能运行顺序，对比分析了3种储能策略对孤岛直流微电网可靠性的影响。首先，建立氢气储能模型、蓄电池储能模型和微电网可靠性评估指标体系；然后，计及系统元件故障，基于序贯蒙特卡洛法，提出计及电-氢混合储能的孤岛直流微电网可靠性评估方法；最后，采用改进的RBTS BUS6 F4馈线系统对孤岛直流微电网进行可靠性评估，对比分析储能策略和电-氢混合储能容量对系统可靠性的影响。结果表明：氢储能可以有效提高系统可靠性，不同的电-氢储能策略和容量对系统可靠性具有不同的影响。

Reliability evaluation of islanded DC microgrid considering electric-hydrogen hybrid energy storage

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.