考虑电池寿命的混合储能微电网优化配置

Optimal configuration of hybrid energy storage microgrid considering battery life

针对偏远地区供电困难的问题,提出一种考虑电池寿命的混合储能微电网优化配置方法。首先,考虑到储能特性,构建了电池寿命模型和水轮机效率模型。基于用电习惯,建立了居民、商业、工业区域的需求响应模型。进而,以年投资成本和日运行成本最低为目标,建立微电网的双层优化配置模型,并通过线性化方法将原问题转化为混合整数线性规划问题。最后,使用基于需求度的Shapley值法对经济成本进行分摊,并分析电池寿命和负荷互补效应对系统经济性的影响。算例表明:所提方法能有效提高电池寿命,降低经济成本;基于需求度的Shapley值法相较于常规Shapley值法在分摊上更加合理;负荷的互补度与共建微电网节省的经济成本成正比。

Given the difficulty of power supply in remote areas, an optimal configuration method for a hybrid energy storage microgrid considering battery life is proposed. First, considering the characteristics of energy storage, battery life and turbine efficiency models are constructed. A demand response model for residential, commercial, and industrial areas is established based on electricity consumption habits. Then, a two-layer optimal configuration model of a microgrid is established with the lowest annual investment cost and daily operating cost. The original problem is transformed into a mixed integer linear programming problem by linearization. Finally, it uses the demand-based Shapley value method to allocate the economic cost and analyzes the influence of the load complementarity effect on the system economy. An example shows that the proposed method can effectively improve battery life and reduce economic cost;the demand-based Shapley value method is more reasonable in allocation than the conventional Shapley value method;the complementarity of loads is proportional to the economic cost saved by co-constructing a microgrid.