Influence of Grid Integration of UPQC with Solar Power on Power Quality

Abstract

To satisfy the expanding usage of power electronics in grid-integrated applications, an unified power quality conditioner (UPQC) is regarded as an effective power tool contributing to power quality issues. Voltage interruption problems remain unresolved even if UPQC handles current harmonics and voltage sag/swell. This study proposes a solar energy-based UPQC to export active power to the grid. The suggested method utilizes photovoltaic (PV) power for power quality management and a boost converter to send the remaining active power back into the grid. The PV-UPQC configuration’s operation is simulated using MATLAB/Simulink. The PV-UPQC system can compensate for resultant harmonics, correct voltage sags, swells, and the maintenance of load voltage at its nominal value in addition to actively supplying the power grid. A considerable decline is observed in the THD of the load current from 104.66% to 2.56%. Conversely, a 97.55% decrease in load current THD is achieved.