30-03-2012, 12:22 PM
Flexible AC Transmission FACTS-Technology and Novel Control Strategies For Power System Stability Enhancement
58002862-Ppt-on-FACTS.ppt (Size: 1.18 MB / Downloads: 93)
FACTS
Flexible AC Transmission System (Facts) is a new integrated concept based on power electronic switching converters and dynamic controllers to enhance the system utilization and power transfer capacity as well as the stability, security, reliability and power quality of AC system interconnections.
FACTS KEY DEVICES
Static Synchronous Compensator (STATCOM)
Static Synchronous Series Compensator (SSSC)
Unified Power Flow Controller (UPFC)
STATIC SYNCHRONOUS COMPENSATOR (STATCOM)
It is a static synchronous generator as shunt static var compensator whose capacitive or inductive current can be controlled independent of the system voltage.
The STATCOM scheme in parallel with AC power grid system and is controlled by a dynamic controller as shown in Fig.1.
STATIC SYNCHRONOUS SERIES COMPENSATOR
It is a static synchronous generator operated without an external energy source as a series compensator.
The o/p voltage is in quadrature with and controllable independently of the line current.
It is increase or decrease the overall reactive voltage drop across the line and thereby controlling the transmitted electric power.
CONCLUSION
The research investigates FACTS topologies & novel control strategies for voltage stability enhancement, T.L power flow control and harmonic/ SSR mode stabilization of an interconnected AC system.
The use of FACTS devices in renewable energy utilization is also studied for small Hydro/ Wind hybrid renewable energy scheme.