考虑灵活性负荷异构性质的多类型储能优化配置

Optimal configuration of multitype energy storages considering heterogeneous flexible loads

灵活性负荷与多类型储能协调优化是实现电力系统电力电量平衡的重要方法,随着大规模灵活性负荷广泛接入电网并参与需求侧响应,灵活性负荷的异构特性已难以适应电网规模化调控需求、无法充分挖掘其调节潜力。本工作提出了考虑灵活性异构负荷的多类型储能优化配置策略,通过聚类灵活性异构负荷建立泛化模型,匹配负荷特性与电网调控需求。首先,基于灵活性异构负荷用电曲线和调节潜力的差异化特性,将典型异构负荷聚类为可转移负荷、可削减负荷和可调节负荷,并建立相应的泛化模型;基于此,提出灵活性异构负荷与多类型储能协调优化策略,以计及发电侧、电网侧、储能侧和负荷侧成本的系统综合运行成本为优化目标,利用混合整数线性规划(mixed integer linear programming,MILP)实现多类型储能的最优配置;最后,通过算例对比分析验证了所提协调优化方案的可行性与有效性,相比于单独考虑灵活性负荷、储能参与系统调控,灵活性负荷与多类型储能协调优化不仅可以实现地区电网电力电量平衡,而且可以降低系统运行成本,提升电网经济效益。

Coordinated optimization of flexible loads and multitype energy storages is a key strategy to achieve a power balance in the system.With large-scale flexible loads widely connected to the grid and participating in demand-side response,the heterogeneous characteristics of flexible loads make them difficult to adapt to the large-scale regulation demand of the grid and prevent them from exploring the full potential for regulation.Accordingly,this study proposes an optimal configuration strategy for multitype energy storages considering flexible heterogeneous loads and establishes a generalized model to match load characteristics and grid regulation demands using clustering flexible heterogeneous loads.First,according to the differentiated power consumption curve and regulation potential of flexible heterogeneous loads,the typical heterogeneous loads are clustered into transferable,cuttable,and adjustable loads with the corresponding generalization model.Accordingly,the coordinated optimization strategy of flexible heterogeneous loads and multitype energy storages is proposed.Meanwhile,with the optimization objective of total system-operating cost considering the cost of generations,grid,energy storages,and loads,the optimal configuration of multitype energy storages is achieved by mixed integer linear programming.Finally,the feasibility and validity of the proposed coordinated optimization strategy are verified using a comparative analysis of cases.Compared with flexible loads or energy storages participating in system regulation alone,coordinated optimization of flexible loads and multitype energy storages can achieve a power balance of regional grids,reduce system operating costs,and enhance grid economic benefits.