New control scheme of power decoupling based on virtual synchronous generator

Abstract

Virtual synchronous generator (VSG) control strategy has received wide attention since it was proposed. In this article, the basis implementation of VSG, namely active and reactive power decoupling control, is discussed. Through analyzing the traditional power decoupling mechanism and its restriction in the medium and low voltage micro-grid, a new power decoupling scheme is proposed which combines adjusting the parameters of controller with adding virtual impedance. Simulation and experimental results verify the effectiveness of the proposed method and show that the new control scheme can implement power decoupling of VSG in the medium and low voltage microgrid and improve the adaptability of VSG in the micro-grid.