Newly-Designed Power Decoupling Strategy for Virtual Synchronous Generator in Micro-Grid

This study proposes an adaptive total-sliding-mode-control-based power decoupling (ATSMCPD) strategy for a virtual synchronous generator (VSG) control in a microgrid (MG). Firstly, the mechanism of the power coupling for the VSG control in a MG is analyzed, and the influence of the power angle on the power coupling is investigated by a small-signal model. Then, the system dynamic model for the proposed power decoupling method is derived. In order to achieve an accurate power decoupling performance, an output voltage compensation for a reactive power loop is designed, and a total sliding-mode controller (TSMC) is adopted with the characteristics of the strong robustness and fast dynamic response. In addition, numerical simulations are provided to verify the superiority of the proposed ATSMCPD method.