AN OPTIMAL LOCATION OF A CAPACITIVE REACTANCE COMPENSATOR IN ELECTRIC POWER SYSTEMS

The paper presents detailed fast control characteristics and continuous compensation capability; Flexible AC Transmission System (FACTS) devices have been researched and adopted in power engineering area. It can increase dynamic stability, and improve power quality. It can also increase utilization of lowest cost generation. FACTS device is to control the power flow actively; it can transfer power flow from one line to another within its capability. The optimal location and parameters of Unified Power Flow Controllers (UPFCs) in electrical power systems is studied. The location of FACTS devices in the power system are obtained on the basis of static and/or dynamic performances, the best locations are in the line congested or near that line. The paper focuses on the operation of the FACTS device under fault that may cause other transmission lines to be overflowed The proposed algorithm in this paper is tested and verified on the 9 bus system by using ATP simulation program. Keywords: Power quality, Sag, FACTS, IEEE-9 bus system