考虑通信故障的直流微电网多储能荷电状态动态均衡策略

State-of-Charge Dynamic Balancing Strategy for Multi Energy Storage of DC Micro-Grid Considering Communication Faults

为实现直流微电网中分布式储能单元荷电状态（state of charge,SOC）均衡以及负荷功率的动态分配,提出新的下垂控制策略。首先,通信正常时,根据SOC分担负荷功率动态调节下垂控制参考电压来协调分布式储能（distributed energy storage,DES）。其次,无通信条件下提出基于Metropolis准则自适应调节下垂系数的控制方法,在无通信情况下自适应调节负荷功率分配。然后,给出了两种工作条件下控制策略的平滑切换方法,保证切换前后系统安全稳定运行的同时依然有效的实现负荷功率均衡分配。最后,通过Matlab/Simulink仿真对本文控制策略进行验证。

In order to realize balance of state of charge（SOC） and dynamic distribution of load power among distributed energy storage（DES） units in DC microgrid, a novel distributed droop control strategy is proposed in this paper. Firstly, under normal communication condition, reference voltage of droop control is adjusted dynamically based on load power share of SOC for DES coordination. Secondly, adaptive droop control method based on Metropolis criterion is proposed to realize power allocation without communication. Then, a smooth switching method between two working modes is proposed to assure system safe and stable operation and realize effectively load power sharing. Finally, the control strategy is verified with Matlab/Simulink simulation.