Combination of the Synchronverter with Droop Control for Hybrid OFF-grid System

In this paper, the synchronverter for hybrid off-grid based on a solar photovoltaic system and synchronous generator to improve the power system stability (frequency and voltage) at the point of common coupling (PCC) is presented. The proposed configuration consists of the PV solar with MPPT, a battery bank, a three phases inverter, and a diesel generator. The three-phase inverter combined with a PV solar mimic the behavior of a synchronous generator with a moment of inertia and is compared with a traditional droop controller. Additionally, the system design of the battery energy storage system (BESS) supports virtual inertia during disturbances. However, the virtual inertia helps to reduce the impact on the frequency deviation during sudden load and solar irradiance variation and faults. For validation, simulation results using MATLAB/Simulink is realized to evaluate the performance of the proposed control strategy.