Research on Parameter Tuning Scheme for Grid-Connected Photovoltaic Inverters

The integration of a large number of grid-connected photovoltaic inverters may introduce issues such as harmonics and stability concerns to power systems. To address these challenges, this paper proposes a parameter tuning scheme for grid-connected photovoltaic inverters, aiming to ensure both dynamic and steady-state performance of the inverter upon integration. First, objective functions are established to characterize the output harmonics of the inverter and the control adjustment time. Second, the parameters to be tuned are constrained based on reactive power and stability requirements, with the optimal inverter parameters derived through an optimization process. Finally, the proposed tuning scheme is validated using the MATLAB/Simulink simulation platform.