Affiliations: [a] State Grid Wuxi Power Supply Company, Wuxi, China
| [b] State Grid Jiangsu Electric Power Co., Ltd, Jiangsu, China
| [c] State Grid Nantong Power Supply Company, Nantong, China
Correspondence:
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Corresponding author. Ying Xu, State Grid Wuxi Power Supply Company, Wuxi 214111, China. E-mail: [email protected].
Abstract: With the increasing penetration of distributed energy resources (DER) in microgrids, DER power inverters have become a critical asset for providing power support to these microgrids. Meanwhile, the grid-forming (GFM) inverters, among these DER inverters, have gained significant attention in microgrid applications for their capability to enable the DERs to operate in different microgrid conditions and various operation modes. Moreover, with the implementation of these GFM inverters, smooth operation mode transition, GFM functions as well as black start functions can be obtained to improve the operation of the microgrid systems. In this article, a generalized control method for a single-phase GFM inverter is developed for community microgrid applications, facilitating smooth operation behavior in both operation modes with grid support functions and stable transition for different microgrid conditions. The control design procedure and function analysis of the proposed control method are explained in detail based on the community microgrid system. The effectiveness of the method in this paper is demonstrated on a 10 kW single-phase GFM inverter prototype with comparison to a model predictive method in recent literature.
