Course Title:
FACTS Controllers
Course Level- PG
Credit Units:
L
T
P/S
SW/F
W
4
-
-
-
TOTAL
CREDIT
UNITS
4
Course Code: ELEC709
Course Objectives:
This course has been designed to help students understand the transmission challenges of emerging modern electrical power systems.The course will present
the basic concepts, principles and operation of fast high power electronic controllersknown as Flexible AC Transmission Systems (FACTS) that enhance power
system stability, and effectively increase transmission capacity thus yielding significantly higher flexibility of operation.
Pre-requisites:Power Electronics, Power System-I, Power Systems-II
Course Contents/Syllabus:
Weightage (%)
Module I
Transmission interconnections, power flow in an AC System, loading capability limits, Power flow and Dynamic stability
considerations, importance of controllable parameters.Opportunities for FACTS, basic types of FACTS controllers, benefits from
FACTS controllers, Requirements and Characteristics of High Power devices – Voltage and Current rating, losses and speed of
switching, parameter trade-off of devices.
Module II
Basic concept of Voltage source converter, Single phase full wave bridge converter, Single phase-leg (pole) operation, Squarewave voltage harmonics for a single phase Bridge, 3 Phase full wave bridge converter. 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, comparison of current source converters with voltage source converters.
Module III
Objectives of shunt compensation, mid point voltage regulation for line segmentation, End of line voltage support to prevent
voltage instability, improvement of transient stability, Power oscillation damping.
Module IV
Methods of controllable var generation: variable impedance type static var generators – TCR and TSR, TSC, FC-TCR, TSC-TCR,
switching converter type var generators, hybrid var generators.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
compensation control.
20
20
20
20
Module V
Static series compensators: Concept of series capacitive compensation, improvement of transient stability, power oscillation
damping, functional requirements. GTO thyristor controlled series capacitor (GSC), thyristor switched series capacitor (TSSC),
and thyristor controlled series capacitor (TCSC), control schemes for GSC, TSSC and TCSC.
20
Student Learning Outcomes:
After completion of this course students will be able
1. Introduce the operating principles, control systems and modeling of different FACTS Controllers
2. Understand the influence of measurement systems, network resonances and harmonic interactions onthe performance of FACTS control systems
3. Provide the techniques of FACTS controller design for enhancing power transfer, stability anddamping, mitigating sub-synchronous resonances,
preventing voltage instability, etc.
4. Understand the interactions amongst various FACTS Controllers and techniques for theircoordination and placement.
Pedagogy for Course Delivery:
Class Room Lectures, assignments, Quizes
Assessment/ Examination Scheme:
Theory L/T (%)
Lab/Practical/Studio (%)
Total
100
-
100
Theory Assessment (L&T):
Continuous Assessment/Internal Assessment
End Term Examination
Components (Drop down)
A
CT
S/V/Q
HA
EE
Weightage (%)
5
10
8
7
70
Text & References:
Text:
“Understanding FACTS” N.G. Hingorani and L.Guygi, IEEE Press.
References:
Indian Edition is available:--Standard Publications, 2001.
“Flexible a c transmission system (FACTS)” Edited by YONG HUE SONG and LLAN T JOHNS, Institution of Electrical Engineers, London.
R.M. Mathur and R.K. Varma, “Thyristor-Based FACTS Controllers for Electrical TransmissionSystems”, IEEE Press and John Wiley & Sons, New
York, USA, Feb. 2002