考虑电池寿命损耗的园区综合能源电/热混合储能优化配置

Optimal Configuration of Electric/Thermal Hybrid Energy Storage for Park-level Integrated Energy System Considering Battery Life Loss

针对园区综合能源系统(PIES)储能容量优化配置问题,为提升PIES规划-运行经济性,提出了考虑电池寿命损耗的PIES电/热混合储能优化配置方法。首先,构建了适用于PIES规划问题的电池寿命损耗模型,用于量化评估电池寿命损耗;进而,在考虑PIES多能互补特性基础上,引入电池置换成本体现电池寿命损耗的长期影响,以电/热混合储能投资置换成本与运行成本等年值最低为目标函数,建立了PIES电/热混合储能容量双层优化配置模型;最后,通过算例验证了文中混合储能配置方法对系统规划-运行经济性、电池使用寿命的提升效果,并比较分析了电/热混合储能与单一储能对系统规划-运行经济性和电池使用寿命的影响。

In view of the optimal configuration of energy storage capacity of the park-level integrated energy system(PIES), in order to improve the economy of the PIES planning and operation, an optimal configuration method for PIES electric/thermal hybrid energy storage considering battery life loss is proposed. Firstly, the battery life loss model applicable to the PIES planning problem is constructed to quantitatively evaluate the battery life loss. Furthermore, by considering the multi-energy complementary characteristics of the PIES, the battery replacement cost is introduced to reflect the long-term influence of the battery life loss.Taking the lowest annual investment, replacement cost and operation cost of electric/thermal hybrid energy storage as the objective function, the double-layer optimal configuration model of the PIES electric/thermal hybrid energy storage capacity is established. Finally, the cases are given to verify the enhancing effect of the hybrid energy storage configuration method on the economy of the system planning and operation and the battery life, and the influence of electric/thermal hybrid energy storage and single type of energy storage on the economy of the system planning and operation and the battery life is compared and analyzed.