presented by:
Vignan’s Nirula

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ABSTRACT:
An experience of operating a large AC network like the one in INDIA has shown that a dispatcher today has hardly any control on the power flow in the transmission network and it is more difficult to regulate the power through the transmission lines. But the FLEXIBLE AC TRANSMISSION SYSTEMS (FACTS) could play a vital role in ensuring committed power flow.
FACTS is one of the best ways to reduce the need for construction of new over head transmission lines is to increase power flow over existing lines. By using this technology we can improve the power transfer capability of the transmission line and these devices have high switching capacity even at high frequencies as these devices have no moving parts we can achieve high sensitivity and better control.
The paper discusses the FACTS technologies, types of FACTS, the static performance viz. increased loading, congestion management, reduced system loss, economic operation, etc., and dynamic performance viz. increased stability limits, damping of power system oscillation, benefits of utilizing FACTS devices.
In this paper, an overview of FACTS controllers is explained.