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Hierarchical control design and verification of a multi-mode microgrid on the Zhairuoshan Island

The microgrid is a solution to clean and economic power supply for sea islands. This paper presents the hierarchical control design and verification of a multi-mode microgrid on the Zhairuoshan Island in China. This microgrid is designed to operate in both grid-connected mode and islanded mode. A hierarchical-based control strategy is implemented in the microgrid central controller (MGCC). Compared with conventional hierarchical control, the renewable energy generators (REGs) and energy storage system (ESS) are both taken into the design consideration. What's more, a control combined with feedforward and feedback is adopted in the secondary and tertiary control to improve the system performance. The control strategies are verified in the Zhairuoshan Demonstration Microgrid.