Mitigation of voltage sag, swell and THD using Dynamic Voltage Restorer with photovoltaic system

Abstract

At present power quality is the primary term in the power system. PQ problems like voltage sag and swells in the load. Fore long occurrence of these hurdles can result in failure of appliances at short duration of time. In this paper in-phase voltage injection scheme for DVR are employed with a Photovoltaic system. Dynamic Voltage Restorer (DVR) is a better performer and is of lesser cost. The control of compensation voltage in Dynamic Voltage Restorer (DVR) has been proposed using synchronous reference frame (dq0) technique and reduced the rating of DVR with compensate the voltage sag and voltage swell and harmonics in the system fed by photo voltaic technique.