Use of FACTS Devices for Improvement of Voltage Profile in Power System

Abstract

The important function of power engineer is to do the planning for best, efficient operation of power system subject to the efficient and best way of power exchange between utility companies. Load flow is universally used as an important tool at planning and design stages of power system. Adequate reactive power management is necessary to maintain voltage profile in power system. The advantages of adequate reactive power control include maintaining power quality and flat voltage profile at all power transmission levels, improvement in power factor, transmission efficiency and system stability. The natural electrical characteristics of the electrical power system can be modified as per the requirements by using Series and Shunt Capacitor compensation techniques. Providing reactive power compensation using shunt and series capacitors and inductors at optimal locations is a well established method to improve the voltage profile in power system. There are several ways to improve power system performance using Static VAR Compensators (SVC). The SVC's are most suitable for regulating voltages, increasing damping of power oscillation and damping synchronous resonances and torsional oscillations. This paper presents the practical results of comparison of performance analysis of power system with compensation (SVC Capacitive) and without compensation and their effect on voltage profile of system. To demonstrate the comparison, the transmission line model of length 180 km is considered. The experimental work outcome is helpful in designing and operational reactive power planning for maintaining suitable voltage profile in power system.