Course Details

Subject {L-T-P / C} : EE6250 : Flexible AC Transmission Systems {3-0-0 / 3}
Subject Nature : Theory
Coordinator : Prof. Sanjeeb Mohanty


FACTS Concept and general system consideration: Transmission Interconnections, Flow of Power in AC Systems, Loading capability, Power flow and Dynamic Stability Considerations of a transmission interconnection, Relative Importance of Controllable Parameters, Basic types of FACTS Controller. Static Shunt Compensators: Objectives of Shunt Compensation, Methods of Controllable Var Generation, Static Var Compensators: SVC and STATCOM, Comparison between STATCOM and SVC, Static Var Systems. Static Series Compensators: Objectives of Series Compensation, Variable Impedance type Series Compensators, Switching Converter type Series Compensators, External Control for Series Reactive Compensators. Static Voltage and Phase angle Regulators: Objective of Voltage and phase angle regulators, Approaches to Thyristor-controlled voltage and phase angle regulators, switching converter-based voltage and phase angle regulators, Hybrid phase angle regulators. Combined Compensators: Unified power flow controller (UPFC) and Interline power flow controller (IPFC).

Course Objectives

  1. Understanding the dynamic and steady state performance of shunt and series connected FACTS device.
  2. Independently control real and reactive power using UPFC.
  3. Performance evaluation of mid point, overcompensated and under compensated power system.

Course Outcomes

Shunt Compensation using thyristors and converters, Series Compensation using thyristors and converters, Angle Compensation, Unified Power Flow Control.

Essential Reading

  1. N.G.Hingorani & L.Gyugyi, Understanding FACTS: Concepts and Technology of Flexible AC Transmission Systems,, IEEE Press, 1999 , It is nice for essential reading and should be used as the base text book
  2. Y. H. Song and A. T. Johns, Flexible AC Transmission Systems, , IET, 1999. , It is a good text book

Supplementary Reading

  1. 1. X.P. Zang, C. Rehtanz and B. Pal, Flexible AC Transmission Systems: Modeling and Control, Birkhauser, 2006. , It is fine for supplementary reading
  2. Acha, Esquivel, Prez and Camacho, Modeling and simulation in power networks, Wiley India Private Limited, 2012 , It is a decent text book