FLEXIBLE AC TRANSMISSION SYSTEMS(SYLLABUS MTECH-EPS II SEM)

UNIT-I: FACTS CONCEPTS
Transmission interconnections power flow in an AC system, loading capability limits, Dynamic
stability considerations, importance of controllable parameters basic types of FACTS controllers,
benefits from FACTS controllers.
UNIT-II: VOLTAGE SOURCE CONVERTERS
Single phase three phase full wave bridge converters transformer connections for 12 pulse 24
and 48 pulse operation. Three level voltage source converter, pulse width modulation converter,
basic concept of current source Converters, and comparison of current source converters with
voltage source converters.

UNIT-III: STATIC SHUNT COMPENSATION
Objectives of shunt compensation, mid-point voltage regulation voltage instability prevention,
improvement of transient stability, Power oscillation damping, Methods of controllable VAR
generation, variable impedance type static VAR generators switching converter type VAR
generators hybrid VAR generators.
UNIT-IV: SVC AND STATCOM
The regulation and slope transfer function and dynamic performance, transient stability
enhancement and power oscillation damping operating point control and summary of
compensator control.
UNIT-V: STATIC SERIES COMPENSATORS
Concept of series capacitive compensation, improvement of transient stability, power oscillation
damping, and functional requirements of GTO thyristor controlled series capacitor (GSC),
thyristor switched series capacitor (TSSC), and thyristor controlled series capacitor (TCSC)
Control schemes for GSC TSSC and TCSC.
TEXT BOOKS:
1. “Understanding FACTS Devices” N.G. Hingorani and L. Guygi.
IEEE Press Publications 2000.