Abstract：As an interconnected system of multiple AC sub-grid and DC sub-grid, microgrid cluster’s complex structure increases its difficulty in power coordination control. To address this issue, this paper proposes a microgrid cluster structure and its autonomous coordination control strategy. The proposed structure is composed of AC sub-grid, DC sub-grid, power exchange unit (PEU) and energy pool (EP). PEU is mainly used to coordinate power exchange among sub-grids and EP, which can realize energy mutual-aid among each sub-grid and maintain the stability of the bus voltage in each sub-grid. Besides, EP is used to stabilize the DC bus voltage of EP, and to reasonably allocate the exchange power that PEU needs. Meanwhile, this paper also proposes the power coordinated control method based on adaptive power exchange coefficient for PEU and the hierarchical coordinated control method for EP, respectively. With the application of the proposed control strategy, the autonomous coordinated control for the microgrid cluster can be realized. Simulation and experimental results have verified the proposed microgrid cluster structure and its autonomous coordination control strategy.
周小平, 陈燕东, 周乐明, 罗安, 伍文华. 一种微网群架构及其自主协调控制策略[J]. 电工技术学报, 2017, 32(10): 123-134.
Zhou Xiaoping, Chen Yandong, Zhou Leming, Luo An, Wu Wenhua. A Microgrid Cluster Structure and Its Autonomous Coordination Control Strategy. Transactions of China Electrotechnical Society, 2017, 32(10): 123-134.
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