基于动态一致性算法的直流微电网高品质协同控制

High Quality Cooperative Control of DC Microgrids Using Dynamic Consensus Algorithm

针对孤岛运行状态下的直流微电网,提出一种基于一致性算法的协同控制策略。该方法中各分布式电源控制单元仅通过与邻居单元进行信息交换,便可实现精确的电压控制和功率分配。然而,经典的协同控制方案需要同时获取其邻居节点的电压和电流信息,但是这往往会导致有较大的通信压力。因此提出一种统一的分布式控制架构,该架构将电压控制和功率分配两个控制目标合并在一起,消除了对邻居节点电流信息的需求,大大减少了对通信带宽的需求。最后,通过仿真验证了所提方法的有效性。

Aiming at islanded DC microgrids, a cooperative control strategy based on consensus algorithm is proposed. In this strategy,the controllers for each distributed generation can achieve precise voltage control and power sharing, which only requires communication with neighboring units. However, the classic cooperative control schemes simultaneously require the knowledge of voltage and current information of their neighboring units, hence still have high communication burden. A unified distributed control strategy is proposed. This strategy integrates the voltage control and power sharing processes into one step, and eliminates the current information from neighboring units, greatly reducing the need of communication bandwidth. Finally, the effectiveness of the proposed method is verified by simulation.