JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Prerequisite

Power Electronics and Power Systems

Course Objectives

to prepare the students to

• identify the limitations of uncompensated lines under various loading conditions.
• understand the concept and importance of compensation through FACTS devices
• explore shunt compensation, and basic operation of SVC, STATCOM and UPFC.
• analyze the functioning of series controllers like GCSC, TSSC, TCSC and SSSC

Course Outcomes

Upon the completion of this course, the student will be able to

• apply proper controller for a specific system requirement
• understand various systems thoroughly and their requirements
• interpret the control circuits of Shunt Controllers SVC & STATCOM for various functions viz. Transient stability Enhancement, voltage instability prevention and power oscillation damping
• detect the power and control circuits of Series Controllers GCSC, TSSC, TCSC and SSSC

UNIT - I: CONCEPT OF FACTS

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 & CURRENT 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: STATIC SERIES COMPENSATION

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), static synchronous series compensator (SSSC), control schemes for GSC, TSSC, TCSC and SSSC.

UNIT - V: SVC & UPFC

The regulation and slope transfer function and dynamic performance, transient stability enhancement and power oscillation damping operating point control and summary of compensator control., basic concept of unified power flow controller (UPFC).

TEXT BOOKS:

• 1. Hingorani H G and Gyugyi. L “ Understanding FACTS-Concepts and Technology of Flexible AC Transmission Systems” New York, IEEE Press, 2000.
• 2. Padiyar.K.R, “ FACTS Controllers in Power Transmission and Distribution” New Age Int. Publishers, 2007 R19 M. TECH. EPE/EPS

REFERENCES:

• 1. Prof. Avik Bhattacharya , IIT Roorkee, NPTEL Course on Flexible AC Transmission Systems (FACTS), July 2018, https://www.youtube.com/playlist?list=PLLy_2iUCG87AVyRAN4QwVQrC8vSg1vWa6
• 2. Zhang, Xiao-Ping, Rehtanz, Christian, Pal, Bikash “Flexible AC Transmission Systems: Modeling and Control”, Springer, 2012
• 3. Yong-Hua Song, Allan Johns, “Flexible AC Transmission Systems”, IET, 1999. R19 M. TECH. EPE/EPS M. TECH. II Year I Sem. (EPE/EPS)