8EE4.2 FACTS DEVICES & THEIR APPLICATIONS

Unit-1 Problems of AC transmission systems, power flow in parallel paths and meshed system,

factors limiting loading capability, stability consideration. Power flow control of an ac

transmission line. Basic types of facts controllers. Advantages of FACTS technology.

Unit-2

(i) Voltage-Sourced Converters:

Basic concept of voltage-sourced converters, single and

three phase bridge converters. Introduction to power factor control. Transformer connections

for 12- pulse, 24 pulse and 48 pulse operations.

(ii) Static Shunt Compensators:

Mid point and end point voltage regulation of transmission

line, and stability improvement. Basic operating principle of Static Synchronous Compensators

(STATCOM). Comparison between STATCOM and SVC.

Unit-3

Static Series Compensators:

Concept of series capacitive compensation, voltage and

transient stabilities, power oscillation and subsynehronous oscillation damping. Introduction to

thyristor- switched series capacitor (TSSC), thyristor controlled series capacitor (TCSC), and

static synchronous series compensator, - operation, characteristics and applications.

Unit-4

(i) Static Voltage and Phase Angle Regulators:

Voltage and phase angle regulation. Power

 


 

flow control and improvement of stability by phase angle regulator. Introduction to thyristor

controlled voltage and phase angle regulators (TCVR and TCPAR)

(ii) Introduction to thyristor controlled braking resistor and thyristor controlled voltage limiter.

Unit-5

(i) UPFC:

Unified Power Flow Controller (UPFC), basic operating principles, conventional

transmission control capabilities. Comparison of UPFC to series compensators and phase angle

regulator. Applications of UPFC.

(ii) IPFC:

Interline Power Flow Controller (IPFC), basic operating principles and

characteristics. Applications of IPFC.