分布式电池储能系统参与自动发电控制的协调控制方法

Coordinated Control Strategy of Distributed Battery Energy Storage System Participating in Automatic Generation Control

分布式电池储能系统(BESS)的协调控制是储能应用中的关键问题。针对聚合多样性BESS参与自动发电控制的应用场景,文中首先提出了基于BESS集群荷电状态(SOC)的集群能量平衡反馈控制结构;然后针对充放电损耗与电池老化建立了BESS的服务成本模型,定义了每个控制周期的边际损耗成本和边际老化成本,据此提出了基于市场机制的无需迭代的控制方法,实现了控制目标在BESS集群内的实时最优分配;最后在仿真中对比了BESS聚合器的多种SOC控制方法以及BESS的多种协调控制方法,验证了所提出方法的有效性。

One essential problem of battery energy application is the coordinated control of distributed battery energy storage systems（BESS）.To study the aggregation of different BESS participating in automatic generation control,a feedback control method of the state of charge（SOC）is firstly proposed.Secondly,a cost model for the charge and discharge loss and battery aging is established.Thirdly,by defining each control cycles marginal loss cost and marginal aging cost,a market-based control method without iteration is proposed to achieve the real-time optimal power allocation within BESS aggregator.Finally,a simulation analysis on the effectiveness of several SOC control methods and coordinated control methods of BESS is implemented.The results verify the effectiveness of the proposed method.