Journal of Applied Science and Engineering

Published by Tamkang University Press

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Chi-Hshiung Lin This email address is being protected from spambots. You need JavaScript enabled to view it.1

1Department of Electrical Engineering, Kao Yuan University, Kaohsiung, Taiwan 821, R.O.C.


 

Received: April 18, 2007
Accepted: January 7, 2008
Publication Date: June 1, 2008

Download Citation: ||https://doi.org/10.6180/jase.2008.11.2.07  


ABSTRACT


In this paper, the effects of two line tripping modes, i.e. sequential mode and resistor-plug-in mode, on torsional vibrations of turbine generators are studied. And the fatigue life losses are estimated, based on the results of an EPRI and a GE testing reports, by using a verified program developed by the Aberdeen University. It is shown in the results that the losses induced by a three-phase-to-ground fault will be significantly reduced under the sequential tripping mode, yet those by a single-phase-to-ground fault will be increased. As to the resistor-plug-in mode, a worse situation in fatigue will occur under all types of faults.


Keywords: Power System, Steam Turbine, Trip, Torsional Vibration, Fatigue


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