混合供电系统中退役电池的模块化储能操作优化

将退役的动力电池用于混合供电系统可有效地降低投资成本,而针对退役电池储能系统的操作优化则可降低混合供电系统的操作费用,并提升混合供电系统的运行收益。以多个初始容量存在差异的电池组构成的退役电池储能系统为对象,在综合考虑退役电池容量衰退特性和电池组初始状态差异的基础上,构建了以年总费用最小为目标的混合供电系统操作优化模型,并将该方法用于一个由光伏发电和储能电池系统构成的混合供电系统的操作优化中。研究表明：储能电池系统中多组退役电池初始状态的差异,使得各电池组在操作过程中的充放电顺序和频率存在显著差异;储能电池系统的操作优化可有效缓解电池容量衰退,与固定比例调度流程相比,该储能电池系统的年总费用更低。

Operation optimization of modularized energy storage of retired batteries in hybrid power systems

The use of decommissioned power batteries for hybrid power systems（HPS） can effectively reduce investment costs, while operational optimization for decommissioned battery energy storage systems can reduce the operating costs of hybrid power systems and increase the operational benefits of hybrid power systems. In this work, an operation optimization model of HPS featuring multi-groups of the retired batteries with different initial capacities is developed to minimize the total annual cost (TAC) by considering the capacity degradation characteristics of the retired batteries. The application of the proposed model was verified through a case study of a HPS with a photovoltaic device and a retired batteries energy storage system. Results show that the charge/discharge sequence and frequency of the retired batteries from different groups are distinct due to the difference in their initial states. In addition, the optimization of HPS operation can not only alleviate the capacity degradation of the retired batteries but also reach a lower TAC than that obtained by using a fixed-ratio operation scheme.