液态金属电池储能系统在光氢耦合微电网中的优化配置

Optimal Configuration of Liquid Metal Battery Energy Storage System in Photovoltaic and Hydrogen Coupled Microgrid

液态金属电池是一种新型电池,其与氢储能共同构成的综合储能系统可以很好地满足微电网的需求。首先为该综合储能系统设计了一套以经济性最优为原则的调度方案,使两种储能装置协调配合,共同平抑并网光伏电能的功率波动。其次,仿真计算该调度方案下的液态金属电池配置成本、微电网年利润、电池预期使用寿命、电池容量不足的天数等指标,并利用这4项指标构建液态金属电池储能系统性能的综合评价模型。最后,以某光氢耦合微电网为例,利用上述模型对不同容量液态金属电池的性能进行评价,得出了电池的最优配置容量。

Liquid metal battery is a new type of battery.The integrated energy storage system composed of the liquid metal battery energy storage system（BESS）and the hydrogen energy storage system（HESS）can well meet the needs of the microgrid.Firstly,an economical scheduling scheme of the integrated energy storage system is designed,which enables two kinds of energy storage system to stabilize the fluctuation of on-grid photovoltaic power in coordination.Secondly,four indices,which are the cost of the BESS,the annual profit of the microgrid,the expected cycle life of the BESS,and the capacity deficiency days of the BESS,are calculated with the scheduling scheme.An integrated evaluation model for the BESS is established based on these four indices.Finally,aphotovoltaic and hydrogen coupled microgrid is used as an example.Evaluation scores of different liquid metal battery capacities are calculated based on the above mentioned model and the optimal capacity of the BESS in this microgrid is obtained.