Enhancing the transient performance and dynamic stability of microgrid using PI inertia injection controller

In power sector, the participation of Renewable Energy Sources (RES) is important from an energy, economic, and environmental point of view. But from the grid's perspective, dynamic performance is crucial for deciding the participation level of RES. Currently, the Derivative Control Technique (DCT) based virtual inertia systems are quite popular. However, the use of DCT improves the transient performance but degrades the steady state parameters (settling time and steady-state frequency error). To improve the overall performance, a novel PI-based Inertia Injection controller has been proposed in this paper. This controller advances the Photovoltaic (PV) based virtual inertia model and improves the transient stability without compromising the steady state one. Further, the effectiveness of the proposed controller has been proved by performing the time-domain simulations under different practical scenarios.