IMPROVEMENT OF POWER QUALITY USING PHOTOVOLTAIC DYNAMIC VOLTAGE RESTORER by Saliha Aarif
In today’s scenario the power quality has become one of the major requirements in the power system where electricity is concern. The power quality problems are generally produced by power electronics equipment’s. This equipment’s may produce nonlinear loads. These can produce interruption in power system hence produce power quality problems. There are some problems that are associated with power quality. Some of the power quality problems are voltage sag, voltage swell, transients, harmonics, voltage spikes etc. Among this voltage sag is one of the major power quality problems. It has detrimental effect on the system operation. In this way there is a need to compensate it in order to avoid perturbation in the system. For this a Custom Power Device is used namely ‘Photovoltaic Dynamic Voltage Restorer’. This is most effective device used for the mitigation of voltage sag, voltage swell, harmonics etc. photovoltaic system used with dynamic voltage restorer can help for energy storage for battery system for further operation. It is non-conventional source of energy. So it is cheaper. A three phase source is connected with dynamic voltage restorer and photovoltaic system to have better results in the mitigation of voltage sag.