Optimal virtual synchronous generator control of AC/DC matrix converter-based PV grid- connected systems

Integrating large-scale renewable energy sources (RESs) into the power grid through an inverter-based system is crucial for decarburization. However, the shortage of system inertia severely impacts frequency stability. This paper proposes a novel approach for a multi-function matrix converter (MF-MC) based on two photovoltaics (PVs) panels connected on the DC side of MC for a grid-connected system. The proposed system allows controlling the power of each PV independently, supports reactive power into the grid, and operates as a virtual synchronous generator to enhance frequency stability. A model predictive control-based virtual synchronous generator (MPC-VSG) is introduced to obtain the optimal performance of the proposed system in different scenarios. MATLAB/Simulink platform is used to validate the MF-MC, and the simulation results show the effectiveness of the presented control strategy.