Application of Virtual Synchronous Generator in Power Systems

Recently, due to the environmental reasons, the renewable energy is getting attention. Therefore, the use of inverter-based resources (IBR), such as PV and wind turbines, has been increasing. However, the number of the traditional synchronous generators (SG) is decreasing, which results in lack of power system inertia. Therefore, the concept of virtual synchronous generator (VSG) is presented, which mimics the dynamic behavior of the traditional synchronous generator. Thus, VSG control has the characteristics of damping and inertia, which is suitable for the power system applications. In this paper, the concept of VSG control is discussed. Furthermore, the comparison of inverter using droop control and inverter using VSG control is given. The results show that VSG control has slower rate of change of frequency (RoCoF), which is more suitable for the control strategy of inverter-based resources in power systems.