Dynamic Voltage restorer Application for Power Quality improvement in nonlinear load

Abstract

Voltage disturbances, particularly the voltage sag and swell are the most common power quality problems due to increased use of a large number of sophisticated and sensitive electronic equipment in industrial systems. To overcome this problem, custom power devices are used, it is a series connected power electronic based device such as Dynamic Voltage Restorer (DVR. This paper presents modeling, analysis and simulation of DVR in MATLAB SIMULINK with Feed forward and Feedback voltage controller. In this method DVR protects a sensitive load, to counter voltage sag under unbalanced loading conditions.