Enhancement of Power Quality under the Condition of No-linear Loading using PV-UPQC

There has been a tremendous increased in non-linear loads in the grid like microprocessor and power electronics based gadgets and control units. The non-linear loads distorts the grid profile and increase the power quality (PQ) issues like voltage and current perturbation, swell and sag in voltages, harmonics, etc. If these PQ issues are not rectified at load end, it may distort the grid profile hence other system too connected to the grid. The need of the time is to increase the use of renewable resources in order to meet the load demand and reduce the carbon emission. To eliminate the PQ issues generated due to non-linear loading and grid connected PV-system a versatile UPQC controller is preferred in the distribution system. Photovoltaic (PV) tied Unified Power Quality Conditioner (UPQC) are connected back to back through dc-link capacitor and have been proposed in this paper for simultaneous mitigation of both current related and voltage based power quality issues.