BHAVNA RATHORE

Flexible AC Transmission Devices (FACTs) are used to control real and reactive power in the transmission and distribution system, but widespread use of this technology has been limited due to high cost and reliability concerns. This paper illustrates the concept of distributive approach for realizing the functionality of FACTs devices. Low cost electronic devices, power electronics and communication technologies if distributedly applied, entire transmission and distribution network may be covered more effectively and cost effective power flow control can easily be done by Distributive FACTs (D-FACTs). The line impedance is dynamically changed control power by distributive static series compensator, and improvement of voltage profile of system is done by the use of distributive static shunt compensator (D-STATCOM). On the other hand distributive power flow controller (DPFC) simultaneously adjusts all the parameter of transmission system: Transmission angle, line impedance and bus voltage magnitude. Different topologies of D-FACTs, their range of applications and compensation provided are presented in this paper.