The Discrete-Time Model Following Controller for a Virtual Synchronous Generator

Abstract

As the penetration level of variable-speed wind turbines continues to increase, the low inertia and lack of synchronous power characteristics of such devices can have a serious impact on the transient stability of a grid. One solution toward stabilizing such a grid with renewable energy sources is to provide additional inertia and synchronizing power in a virtual manner. We proposed a discrete-time model following controller for a virtual synchronous generator. In this paper, we compared the proposed method with the conventional method of using PI current controller. It is shown that proposed method accurately follows the virtual synchronous generator machine model.