Three-Phase Grid Interfaced PV-BS System with Enhanced Power Quality

This article proposes an adaptive affine projection (AAP) algorithm based control technique for a three phase grid connected photovoltaic battery storage (GCPBS) system. The loads connected at the point of common coupling are mainly fed by the PV, and the absence of PVis compensated by the battery. Similarly, the excess generation of PV is fed to the battery and the grid. This PV intermittency and nonlinear loads cause power quality (PQ) issues. To address these issues, the proposed AAP based control technique generates a sinusoidal reference current by extracting the weight component of the load current. Furthermore, the proposed control approach effectively maintains the power flow in the system and mitigates grid current harmonics, thereby improving the grid PQ. Additionally, proper power balance is maintained irrespective of dynamic conditions and enhances the battery life simultaneously. The performance of the proposed control technique is evaluated by simulating in the MATLAB/Simulink platform.