PV Compensation in Improving the Voltage Quality in LV Electrical Networks

Abstract

Of all known power quality problems, voltage sags provide the greatest cause for concern. Sags occur more frequently than outages and therefore, tend to be more costly for the high –technology industry as modern technical equipments need a good quality voltage. Voltage sag can affect both the magnitude and phase of the voltage. Although the voltage sag is only for a short duration, sensitive equipments may malfunction.The project aims to compensate the voltage sag with solar power batteries with invertes. At day time solar power PV panel charge the batteries and when ever sag occurs,the voltage is compensated with synchronized inverter in series with the existing transformer.The Series voltage regulator regulates the output voltage by injecting voltage in synchronism with the supply when an upstream sag is detected, thus protecting the loads from voltage sags.It is cost effective customer based solution to regulate the voltage sag which improves voltage quality at load side and can be directly connected to AC power line