Modal control design of damping controllers for thyristor-controlled series-capacitor module to stabilize common-mode torsional oscillations of a series-capacitor compensated power system

Li Wang, Hazlie Mokhlis, Hong Rong Liang, Anton V. Prokhorov, Chua Kein Huat

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This paper proposes a unified approach based on modal control theory to design damping controllers of a thyristor-controlled series capacitor (TCSC) module for stabilizing the inherent common-mode torsional interactions occurred in a series-capacitor compensated power system. The studied power system includes two nonidentical turbine-generator sets connected to an infinite bus through a common series-capacitor compensated transmission line. The proposed TCSC module is properly connected in parallel with a part of the series-capacitor bank of the compensated transmission line. The damping controllers of the TCSC module employ the speed deviations of both turbine-generator sets as input signals to stabilize unstable torsional modes of the studied system by increasing the damping of these modes. Both frequency-domain approach based on eigenvalue analysis and time-domain scheme based on nonlinear-model simulations under different disturbance conditions are systematically performed. It can be concluded from the simulated results that the proposed TCSC module joined with the damping controllers designed by using modal control theory can effectively stabilize the common-mode torsional oscillations of the studied series-capacitor compensated system.

Original languageEnglish
Title of host publication2018 IEEE Industry Applications Society Annual Meeting, IAS 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538645369
DOIs
Publication statusPublished - 26 Nov 2018
Event2018 IEEE Industry Applications Society Annual Meeting, IAS 2018 - Portland, United States
Duration: 23 Sep 201827 Sep 2018

Conference

Conference2018 IEEE Industry Applications Society Annual Meeting, IAS 2018
CountryUnited States
CityPortland
Period23.9.1827.9.18

Keywords

  • Damping controller
  • Index 7enm-Common-mode torsional oscillations
  • Modal control theory
  • Stability
  • Subsynchronous resonance
  • Thyristor-controlled series-capacitor module

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment

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  • Cite this

    Wang, L., Mokhlis, H., Liang, H. R., Prokhorov, A. V., & Huat, C. K. (2018). Modal control design of damping controllers for thyristor-controlled series-capacitor module to stabilize common-mode torsional oscillations of a series-capacitor compensated power system. In 2018 IEEE Industry Applications Society Annual Meeting, IAS 2018 [8544580] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IAS.2018.8544580