Grid-Connected PV System Under Partial Shading Condition Using Flower Pollination Algorithm

Maximum power point tracking (MPPT) methods may be employed to operate a photovoltaic (PV) system at its maximum power point (MPP), which is necessary to get the utmost electricity out of it. Due to partial shading conditions, the operating point tends to oscillate. Because of several peaks in the P-V curve, due to partial shading of PV, rises the complexity of the MPPT process. In this study, a novel MPPT control method called the Flower Pollination (FP) algorithm is described, and a levy distribution is inferred to improve the convergence of the FP. The research utilizes the FP algorithm to demonstrate the effectiveness of a control approach for a single-phase inverter with a grid-connected PV system in a partially shaded situation. The system comprises four parallel-connected PV arrays that are partially shaded, a Boost Converter, an LCL filter, and a single-phase inverter that connects to the single-phase grid. For inner current control in this study, the PR controller has been utilized instead of the PI controller, and the PI controller is used for outer voltage control. The PR controller's ability to follow the sinusoidal reference current with zero steady-state error is its main benefit. The MATLAB Simulink environment is used to test and validate the controller's performance.