IMPROVING POWER QUALITY ENHANCEMENT USING DYNAMIC VOLTAGE RESTORER(DVR) SYSTEM

Abstract

Power quality has become one of the most significant parameters in today’s power world. Power quality is mainly related with the quality of voltage, current and frequency. As now-a-days due to open access, the competition in generation, transmission and distribution sector has increased. So it is become necessary to maintain power quality standards, so as to fulfil the needs of consumers. Generally, most of the power quality problems constitute of voltage sags and voltage swells. Problems like voltage sags occurs mainly due to the line faults or starting of electrical motors or due to the saturation of magnetic circuits or due to non-linear utility loads. So here we are mainly dealing with problems of voltage sags due to line faults. In order to overcome this problem, we are using Dynamic Voltage Restorer (DVR) with Photovoltaic (PV) and Battery storage, Multilevel Inverter (MLI), PI Controller with SPWM. As DVR injects the voltage in series with the line and maintains the load voltage constant. Here simulation for the system has to be carried out using MATLAB Software and hence it has to show that voltage sag/swell is compensated.