Power system performance enhancement using flexible AC transmission system devices

摘要

The objective of this research is to investigate the performance enhancement of a powerudsystem using Flexible AC Transmission System (FACTS) devices. It is intended to showudhow the reliability and performance of the power system is improved. The focus is toudenhance the understanding of the system operating with and without these devices.udPower transmission can always be improved by upgrading or adding new transmissionudcircuits. But this is not a practical solution. FACTS devices are feasible alternatives forudoptimizing the transmission systems. Providing reactive shunt compensation with shuntconnectedudcapacitors and reactors is a well-established technique to get a better voltageudprofile in a power system. Shunt capacitors lack dynamic capabilities, and so dynamicallyudcontrolled reactive power compensation is essential. This feature is provided by FACTSuddevices. Implementation of new equipment consisting high power electronics basedudtechnologies such as FACTS becomes essential for improvement of operation and controludof power systems.udFACTS promote the use of static controllers to enhance the controllability and increase theudpower transfer capability. Three software tools were used in this thesis, such as, MATLAB,udPSCAD and PowerWorld. Thyristor Controlled Reactors (TCR), Thyristor ControlledudSeries Capacitors (TCSC), Static Var Compensators (SVC) are used as FACTS devices forudconsideration in the power system study. This thesis aims at examining the ability ofudFACTS devices and distributed FACTS devices for power flow control and reactive powerudcompensation in a power system.