Theoretical and Hardware Simulation Studies of Adaptive Virtual Inertia Control Strategy for Synchronverter in Grid-Connected Solar Power System

In this thesis, an adaptive virtual inertia control strategy for synchronverter has been proposed to stabilize the operating frequency of a grid-connected solar power system under dynamic weather. Its effectiveness has been validated by MATLAB®/ Simulink simulation and Typhoon® Hardware-in-the-loop 402 by comparing it against conventional proportional-integral and fuzzy logic-based synchronverters. The results indicated that the proposed method had reduced the maximum frequency deviation, settling time to reach quasi-steady-state frequency and steady-state error by at least 0.1Hz, 35% and 27%, respectively. This research aims to accelerate the transformation towards grid-connected solar power systems by innovating renewable sources grid interfacing systems.