Department of Electrical and Electronics Engineering

Flexible AC Transmission systems
Unit - 1
INTRODUCTION
Reactive power control in electrical power transmission lines -Uncompensatedtransmission line - series compensation Basic concepts of static Var Compensator(SVC) Thyristor Switched Series capacitor (TCSC) Unified power flow controller(UPFC).
Unit - 2
STATIC VAR COMPENSATOR (SVC) AND APPLICATIONS
Voltage control by SVC Advantages of slope in dynamic characteristics Influence ofSVC on system voltage Design of SVC voltage regulator Modelling of svc for powerflow and transient stability Applications: Enhancement of transient stability Steadystate power transfer Enhancement of power system damping Prevention of voltageinstability.
Unit - 3
THYRISTOR CONTROLLED SERIES CAPACITOR (TCSC) AND APPLICATIONS
Operation of the TCSC Different modes of operation Modelling of TCSC Variablereactance model Modelling for Power Flow and stability studies. Applications:Improvement of the system stability limit Enhancement of system damping-SSRMitigation.
Unit - 4
VOLTAGE SOURCE CONVERTER BASED FACTS CONTROLLERS
Static Synchronous Compensator (STATCOM) Principle of operation V-ICharacteristics. Applications: Steady state power transfer-Enhancement of transientstability - Prevention of voltage instability. SSSC-operation of SSSC and the control ofpower flow Modelling of SSSC in load flow and transientstability studies.Applications: SSR Mitigation-UPFC and IPFC
Unit - 5
CO-ORDINATION OF FACTS CONTROLLERS
Controller interactions SVC SVC interaction Co-ordination of multiple controllersusing linear control techniques Control coordination using genetic algorithms.