Inrush Current Mitigation Technique of Load Transformer for Series Voltage Sag Compensator using SVPWM Technique

In modern power system reliability and stability are considered to be very important issues. Stability of the system can be achieved by enhancing the power quality. Power quality deals with several issues and problems in distribution power system, maintaining the power quality can be beneficial for both customer and utility. As the system is increasing and is a vast network power quality is main issue to be considered for increasing efficiency, stability and reliability. Power quality may be affected by voltage sag, voltage swell, harmonics, transients, voltage fluctuation, dc offset, interruptions, noise etc. In recent era boost in computer technology and electronics devices flooded the system with the devices prone to quality of power, as the system consist of electronics load, critical loads, electronics processors which are very sensitive to quality of power. Through survey we found that voltage sag is generally present in power system. Many techniques are available for voltage sag compensation. To maintain the system voltage profile the voltage sag compensator is in need to be installed at various level in the power system. Voltage sags have become one of the most important power quality concerns in recent years. According to survey results across the US, voltage sags and short-duration power outages account for 92% of power quality problems encountered by industrial customers. Voltage sags often cause under voltage faults in various sensitive loads and subsequently interrupt the manufacturing processes.