APPLICATION OF FACTS DEVICES IN POWER SYSTEMS

A reliable, stable and economically feasible electric power demand has been
increasing rapidly in recent years. The complex interconnected power systems
experience stability problems which lead to the overall system interruptions. FACTS
(Flexible AC Transmission System) devices are being used to overcome power
transmission problems such as power loss, over-loading, instability. This paper
discusses the modeling and application of using FACTS (Flexible AC Transmission
System) devices in power industry. The previous works ofHingorani, Gyugyi et al on
FACTS in power transmission were studied and analyzed. The theory of power line
transmission was studied. Two types ofF ACTS devices exist in power transmission;
conventional thyristor based and fully controlled semiconductor based FACTS
devices. The paper studies common devices like TCR, SVC, TCSC, VSC,
STATCOM, SSSC and UPFC. Simple circuit diagrams and basic mathematical
analysis of these devices are presented briefly. As a result the Matlab simulation of
STATCOM, SVC and SSSC was run for further analysis of FACTS devices. Detailed
analysis and comments on three FACTS devices that were simulated were given in
the report.