Improved control of PV grid-connected systems via a novel approach MPPT hybrid: incremental conductance-synergetic control

As photovoltaic energy integration into the grid becomes increasingly essential for sustainable development, the demand for advanced control strategies has grown substantially. This paper investigates and simulates a two-stage photovoltaic energy conversion system connected to a three-phase grid, with control strategies addressing both the DC and AC sides. The DC bus is managed through a novel hybrid maximum power point tracking (MPPT) method, combining incremental conductance and robust synergetic control, while the AC bus is controlled via DC link voltage regulation, phase-locked loop synchronization, and voltage source inverter (VSI) control. The hybrid MPPT approach derives the initial duty ratio from the incremental conductance algorithm and applies synergetic control as a corrective layer to optimize performance. MATLAB/Simulink simulations demonstrate that the proposed method achieves an MPPT efficiency of 99.65%, with reduced ripple and chattering compared to standalone techniques. The VSI operates with an efficiency of 98%, contributing to improved power quality and lower total harmonic distortion (THD) in the injected current. While the results are promising, further investigations under highly dynamic environmental conditions are recommended to fully validate the robustness of the proposed method.