Design and Performance Evaluation of P-Resonant Controllers for Power Quality Improvement in PV-Integrated Grid

Harmonics generated by distributed generation (DG) systems pose a significant challenge to power quality, especially with the growing integration of these systems into the grid. Effective harmonic control is essential to minimize their adverse impact on grid stability and performance. This paper presents an advanced proportional current controller combined with a selective harmonic compensator for grid-connected photovoltaic (PV) systems. The proposed P-resonant current controller (PRCC) plays a crucial role in ensuring the delivery of high-quality current from the PV inverter to the grid. To maintain power quality, the controller must minimize distortion and suppress harmonic generation. The effectiveness of the proposed approach has been validated through MATLAB/Simulink simulations.