Formula for the effect of a static VAr compensator on synchronising torque coefficient

Author

El-Emary, A.A.

Author_Institution

Dept. of Electr. Power & Machines, Cairo Univ., Giza, Egypt

Volume

143

Issue

6

fYear

1996

fDate

11/1/1996 12:00:00 AM

Firstpage

582

Lastpage

586

Abstract

A static VAr compensator (SVC), constructed by a fixed capacitor (FC) and a thyristor controlled reactor (TCR), is designed and implemented to improve the damping of a synchronous generator, as well as controlling the power system voltage. The SVC is placed at the generator bus terminal, with the speed and voltage deviation as the feedback signals. In this paper, a formula has been developed showing the effect of SVC on synchronising torque coefficient, such that damping is improved and the system voltage is controlled. A simplified analysis of the effect of SVC on the stability of a machine connected to an infinite bus, as well as a simplified 21 bus real power system, is presented. Results from digital simulation show that the SVC can greatly enhance the damping of power system oscillations caused by disturbances. Also, the voltage profile of the generator is controlled by the SVC

Keywords

compensation; control system analysis computing; damping; electric machine analysis computing; machine control; power system analysis computing; power system control; power system stability; reactive power control; static VAr compensators; synchronisation; synchronous generators; voltage control; digital simulation; disturbances; feedback signals; fixed capacitor; generator voltage profile; power system oscillations damping; power system stabilisation; power system voltage control; static VAr compensator; synchronising torque coefficient; synchronous generator damping; thyristor controlled reactor;

fLanguage

English

Journal_Title

Generation, Transmission and Distribution, IEE Proceedings-

Publisher

iet

ISSN

1350-2360

Type

jour

DOI

10.1049/ip-gtd:19960544

Filename

556759