Comparative Performance Analysis of MPPT Algorithms for Grid-Interconnected Photovoltaic Systems

Based on the outcomes of this study, a comprehensive modeling and simulation framework for a renewable-energy-based hybrid microgrid system with appropriate control strategies is presented. The solar generation unit comprises a photovoltaic (PV) array coupled with a DC–DC boost converter. The boost converter is regulated using the incremental conductance (IC) MPPT algorithm along with an auxiliary maximum power point tracking technique to ensure optimal power extraction from the PV array. An IGBT is employed as the switching device in the boost converter, operating at a switching frequency of 50 kHz. The PV system is interfaced with a 1000 V DC bus, which serves as the common coupling point of the hybrid microgrid. The grid-side network is modeled using a 120 kV, 50 Hz AC utility source, connected through a 400 V/120 kV step-up transformer. A full-bridge inverter topology utilizing IGBT switches is implemented to convert DC power into AC power. To achieve proper synchronization with the utility grid, a phase-locked loop (PLL) control scheme is employed, ensuring that the inverter output voltage matches the grid in terms of phase, frequency, and amplitude. The system is operated under solar irradiance conditions, and simulation results demonstrate that the proposed hybrid microgrid configuration successfully achieves the desired performance objectives.