Published Paper Details:

A power quality issue, especially, voltage problem is the vital concern in most distribution systems today. So far, the voltage problem is mainly from under-voltage (voltage sag) condition due to a short circuit or a fault. Power quality in the distribution system is the important issue for industrial, commercial and residential applications today. The voltage problem is mainly considered from under-voltage (voltage sag) condition caused by short circuit or fault somewhere in the distribution system. This paper presents a series voltage regulator for distribution transformer which improves the voltage sag/swell occurring at secondary side of transformer. The hysteresis voltage controller based series voltage regulator which connect after transformer secondary side is presented. The controller is comprises of Phase lock loop for reference voltage generation, the hysteresis controller is used for generation of gating signal. The complete system is developed in MATLAB. System is tested for different power quality disturbances which provide sufficient results for power quality disturbance improvement.