In this paper, a coordinated control methodology for distributed power supply is proposed to solve the problem of power balance and voltage stability in DC microgrid. The methodology introduced the target attraction function into the consensus algorithm with the equal increment principle is able to search for the optimal power out-put of distributed generation units instantly and obtain DC bus voltage rapidly and stably, which make the total op-erating cost of a stabilized DC microgrid the lowest. The coordinated control methodology proposed in this paper is suitable for distributed control of power supply in DC microgrid. Due to the absence of central controller, the ro-bustness and flexibility of the system are increased. Eventually, the simulation model of DC micro grid is built by Matlab/Simulink. Through the analysis of the simulation results, the effectiveness of the strategy is verified.%本文针对直流微电网中的功率平衡与电压稳定问题,提出了一种分布式电源协调控制策略.该策略通过在一致性算法中引入目标吸引函数,结合等微增率原则,能够快速地搜索分布式发电单元的最优功率输出点,实现母线电压迅速恢复,使得稳定后的直流微电网总运行成本最低.本文所提出的协调控制策略,适用于直流微电网中电源的分布式控制,由于没有中心控制器,增加了系统的鲁棒性与灵活性.最后通过Matlab/Simulink搭建直流微电网仿真模型,并对仿真结果进行分析,验证了该策略的有效性.
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