Abstract：The droop-based primary control of DC microgrid shows the drawbacks of steady-state bus voltage deviation and inaccurate current sharing. Although, the traditional centralized or distributed secondary control strategy can achieve bus voltage restoration and accurate current sharing. However, the generation cost of each DG unit is not considered in the traditional control strategy. In order to improve the stability and operation efficiency of DC microgrid, distributed average bus voltage recovery control algorithm and distributed optimal load distribution algorithm were designed based on distributed consensus theory. Based on the proposed distributed secondary control, bus voltage restoration and economic dispatch can be achieved simultaneously in the secondary control layer, thus the operational efficiency of microgrid can be improved. In addition, the proposed control strategy can be achieved in a fully distributed way, which shows the advantages of flexibility, robustness and scalability.
李忠文, 程志平, 张书源, 王要强, 司纪凯. 考虑经济调度及电压恢复的直流微电网分布式二次控制[J]. 电工技术学报, 2021, 36(21): 4482-4492.
Li Zhongwen, Cheng Zhiping, Zhang Shuyuan, Wang Yaoqiang, Si Jikai. Distributed Secondary Control for Economic Dispatch and Voltage Restoration of DC Microgrid. Transactions of China Electrotechnical Society, 2021, 36(21): 4482-4492.
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2021, Vol. 36 
