Anuj Kumar, Pramod Kumar Rathore
This work focuses on the design and analysis of a three-phase single stage solar photovoltaic integrated unified power quality conditioner (PV-UPQC). The PV-UPQC is composed of shunt and series voltage compensators that are interconnected in a back-to-back configuration via a shared DC-link. The shunt compensator serves the twin purpose of harvesting electricity from the photovoltaic (PV) array and correcting for harmonics in the load current. A more advanced synchronous reference frame control, using a moving average filter, is used to extract the load's active current component, resulting in enhanced performance of the PV-UPQC. The series compensator is designed to mitigate power quality issues on the grid side, specifically addressing problems such as voltage sags and swells. The compensator introduces voltage that is either in-phase or out of phase with the point of common coupling (PCC) voltage, depending on whether there is a sag or swell situation, respectively. The suggested system integrates the advantages of sustainable energy production while enhancing power quality. The system's steady state and dynamic performance are assessed by conducting simulations in MATLAB-Simulink with a nonlinear load. The system performance is further validated by conducting experiments on a reduced-scale laboratory prototype, subjecting it to various disturbances like load imbalances, voltage sags/swells at the point of common coupling (PCC), and variations in irradiation.
Power Quality, shunt compensator, series compensator, UPQC, Solar PV, MPPT.