SWING, VOLTAGE STABILITY AND POWER TRANSFER CAPABILITY IN TRANSMISSION SYSTEM WITH UPFC: THE ART OF STATUS

Abstract

In modern era, the increasing size of the power sys tem, to maximize the use of existing systems and to provide adequate voltage support is an emphasis on finding solutions. This f lexibility is needed electricity. Better placed than the Flexible AC Transmission Systems (FACTS) to control the flow of electricity, and to provide voltage support can be effective in turn resulting in less damage. The impact of these tools on line flow and bus volt age profile at random algorithm to determine the op timal number of ratings have been studied by keeping them better . The FACTS devices are expensive cause of that FACTS type, number and location of the FACTS devices is very important, for decide the optimal location and parameters of FACTS device s. FACTS are used in the following purposes: Transm ission pricing issues by maximizing social welfare with or without considera tion of FACTS’ costs; Better utilization of FACT by maximizing FACTS devices total transferred power; Reactive power or voltage control by minimizing transmission losses, or volta ge fluctuation. Increase system’s security under emergency by minimizing tra nsmission lines loadability. Power flow control, a current long transmission lin e, plays an important role within the energy system . The letter swings, longdistance transmission line voltage and power flow c ontrol in unified power flow controller (UPFC) base d compensation associated series or shunt FACTS devices are employed. Device s such as the proposed transmission line, between tof the sending and receiving end to the transmission line is used in p laces as different. Here also deals with determini ng the optimum placement of Flexible AC Transmission Systems (FACTS) damping ou t swings, voltage and improves power transfer devic es for a long transmission line. Here the concept of compensation mid-point o f facts is presented for optimal placement.