The problem of parallel controlling of distributed energy storage system in DC micro-grid is researched deeply.According to the depth analysis of the principle of traditional voltage droop control strategy,it is sure that the coupling degree between line impedances of distributed energy storage units is very high.The master-slave droop control strategy is presented to overcome the weakness,which can make the line impedances decouple completely.In order to determine the range of droop coefficient,the corresponding calculation method is proposed.The related experiment is carried out and the experimental results prove the master-slave droop control strategy is correct and reasonable.%针对分布式储能系统的并联控制问题进行了深入研究.采用传统电压型下垂控制策略时,分布式储能单元之间线路阻抗耦合度很高,并联控制效果较差.针对电压型下垂控制策略的不足,提出新型主从下垂控制策略,实现了分布式储能系统线路阻抗的完全解耦,提高了系统并联控制精度.同时,提出了主从下垂控制器的实现方法并给出了系统关键控制参数的计算方法.最后,进行了实验验证,实验结果证明了所提主从下垂控制策略的合理性和正确性.
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