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Distributed Energy Dispatch of Electrical Energy Storage Systems Using Consensus Control Approach

机译：使用共识控制方法的电能存储系统的分布式能量分配

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Energy dispatch task of electrical energy storage systems (EESSs) contains the state of charge (SoC) balance and the supply-demand balance, where the former ensures the maximum power capacity of the group of EESSs, and the latter maintains the load operation and reduces energy lost. A unified switching model is established for both charging and discharging processes of EESSs. EESSs are assumed to share a common communication network. Dependent on the communication between EESSs, three distributed energy dispatch algorithms are proposed based on consensus control approach, graph theory and Lyapunov method. Without considering constraints, the first algorithm is designed to determine the charging/discharging power reference of every EESS as the sum of a nominal power value and an SoC-based correction term, where the nominal term and the correction term respectively decrease the supply-demand and the SoC imbalances. By applying a dynamic saturation function to the first algorithm, a second one is constructed satisfying the charging/discharging mode switching constraint and the power limit constraint. On the basis of the second algorithm, a third one is obtained by additionally taking into account the SoC limit. Lyapunov stability analysis shows that the third algorithm not only asymptotically realizes the energy dispatch objective but also satisfies the power and SoC constraints, provided that the communication graph is undirected and connected. Effectiveness of the third algorithm is demonstrated by simulation results.
机译：电能存储系统（EESS）的能量分配任务包含充电状态（SoC）平衡和供需平衡，其中前者确保EESS组的最大功率容量，而后者则保持负载运行并降低能量损失。针对EESS的充放电过程建立了统一的切换模型。假定EESS共享一个公共通信网络。根据EESS之间的通信，基于共识控制方法，图论和Lyapunov方法，提出了三种分布式能源调度算法。在不考虑约束的情况下，第一种算法设计为将每个EESS的充电/放电功率参考确定为标称功率值和基于SoC的校正项之和，其中，标称项和校正项分别降低了供需以及SoC失衡。通过将动态饱和函数应用于第一种算法，可以构建第二种满足充电/放电模式切换约束和功率限制约束的算法。在第二种算法的基础上，通过另外考虑SoC限制获得第三种算法。 Lyapunov稳定性分析表明，第三种算法不仅可以渐近地实现能量分配目标，而且还可以满足功耗和SoC约束，前提是该通信图是无向的和连接的。仿真结果证明了第三种算法的有效性。

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