Performance Analysis of Dynamic Voltage Restorer (DVR) Against Voltage Sag

Power quality is major concern in industries today because of enormous losses in energy and money. With the advent of sophisticated electrical and electronic equipment’s which are very sensitive to disturbances and non-linear loads at distribution systems, produces many power quality problems like voltage sags, swells and harmonics and the purity of sine waveform is lost. Voltage sags are considered to be one of the most severe disturbances to the industrial equipment’s. Dynamic voltage restorer has been considered the very effective solution for the mitigation of voltage sags. In this paper the effectiveness of dynamic voltage restorer for voltage balancing is presented.The dqo based control algorithm is considered for mitigating voltage sag. The MATLAB/Simulink demonstrates the validity and superiority of proposed control strategy during various fault conditions on distribution system