Abstract

Virtual synchronous generator (VSG) is a grid-friendly way to integrate distributed energy. However, when the traditional VSG control method is used, the transient performance of the system may deteriorate when various short circuits occur. To solve this problem, a novel control strategy for VSG is proposed. Firstly, second order nonlinear state space model of signal VSG infinite bus system is analyzed to formulate the problem. Then, the model is transformed into a linear system by exact linearization and linear control law is gained with linear quadratic regulator. Finally, by carrying on inverse transformation, the nonlinear voltage control law is obtained. Simulation results are presented to verify the validity and effectiveness of the proposed control strategy.

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