Decentralized control for multimachine power systems with nonlinear interconnections and disturbances

Kyu Ii Jung, Kwang Youn Kim, Tae Woong Yoon, Gilsoo Jang

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

In this paper, a decentralized control problem is considered for multimachine power systems with nonlinear interconnections and disturbances. A direct feedback linearization compensator is employed to cancel most of the nonlinearities, and then a backstepping procedure is applied to deal with the interconnections and to reduce the effects of a disturbance that does not satisfy the matching condition. In this procedure, the disturbance is handled by using a smooth approximation of the signum function. Practical stability is achieved under the assumption that the infinite norm of the disturbance is known. However, even in the case where the infinite norm of the disturbance is not known precisely, the proposed control system still guarantees L2 stability. Furthermore, the origin is globally uniformly asymptotically stable in the absence of the disturbance. A three-machine power system is considered as an application example.

Original languageEnglish
Pages (from-to)270-277
Number of pages8
JournalInternational Journal of Control, Automation and Systems
Volume3
Issue number2 SPEC. ISS.
Publication statusPublished - 2005 Jun 1

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Keywords

  • Backstepping
  • Decentralized control
  • Nonlinear systems
  • Power system control
  • Robust control

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computer Science Applications

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