The control of battery energy storage systems (BESSs) plays an important role in the management of microgrids. In this paper, the problem of balancing the state-of-charge (SoC) of the networked battery units in a BESS while meeting the total charging/discharging power requirement is formulated and solved as a distributed control problem. Conditions on the communication topology among the battery units are established under which a control law is designed for each battery unit to solve the control problem based on distributed average reference power estimators and distributed average unit state estimators. Two types of estimators are proposed. One achieves asymptotic estimation and the other achieves finite time estimation. We show that, under the proposed control laws, SoC balancing of all battery units is achieved and the total charging/discharging power of the BESS tracks the desired power. A simulation example is shown to verify the theoretical results.

中文翻译：

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直流微电网中电池储能系统的分布式协作控制

电池储能系统（BESS）的控制在微电网的管理中起着重要作用。在本文中，将平衡电池中的网络电池单元的荷电状态（SoC）满足总充放电功率要求的问题作为分布式控制问题提出并解决。建立了电池单元之间的通信拓扑的条件，在该条件下，根据分布式平均参考功率估计器和分布式平均单元状态估计器，为每个电池单元设计了控制律，以解决控制问题。提出了两种类型的估计器。一个实现渐近估计，另一个实现有限时间估计。我们表明，根据拟议的控制法，实现了所有电池单元的SoC平衡，并且BESS的总充电/放电功率跟踪所需的功率。给出了一个仿真例子来验证理论结果。