APPLICATION OF SUPER CAPACITOR IN ENHANCING POWER QUALITY OF UPQC FOR A THREE PHASE BALANCED

This paper introduces the integration of unified power quality conditioner with the supercapacitor for improving the power quality at the supply mains. This work described the unified power quality conditioner principles and power restoration for balanced or unbalanced voltage sags or swells in a distribution system. This method proposes a typical configuration of unified power quality conditioner for compensating sag or swells conditions for three phase system that consists of a DC/DC converter supplied by a supercapacitor at the DC link. A suitable series-shunt controller is employed for controlling the unified power quality conditioner under balanced or unbalanced load currents is also presented. The operation of the proposed system is modeled and simulated in MATLAB environment using Simulink and Simpower System toolboxes