Suppression of torsional oscillations using thyristor-controlled conductance in parallel to series-capacitor segment

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Abstract

This paper presents the analyzed results of a study on the application of thyristor-controlled conductance in parallel to one series-capacitor segment for suppressing subsynchronous resonance (SSR) that occurs in a series-compensated power system. The IEEE Second Benchmark Model, system-1, which has one turbine-generator set, is taken as a standard model for this study. In order to stabilize all SSR modes in the studied system, a unified approach based on modal control theory is proposed to design a damping controller which is a dynamic output feed-back compensator using shaft speed deviation of the studied generator as a feedback signal. To demonstrate the effectiveness of the proposed control scheme, frequency-domain approach based on eigenvalue analyses and time-domain approach based on non-linear model simulations are performed. The simulated results show that the proposed SSR damping scheme can effectively suppress torsional oscillations of the studied system.

Original languageEnglish
Pages (from-to)311-318
Number of pages8
JournalEuropean Transactions on Electrical Power
Volume7
Issue number5
Publication statusPublished - 1997 Dec 1

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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