The dynamic stability analysis of wind turbines under different control strategies

Yaojie Yin, Mingfu Liao, Pin Lyu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

11 Scopus citations

Abstract

The control strategies have influences on the dynamic stability of modern wind turbines. This article presents a theoretical investigation on this topic. The investigation is motivated by a vibration measurement of wind turbines in a wind farm. The mechanisms of control strategies influencing the dynamic stability have been discussed and the stability enhancement by means of time delay in pitch control is investigated. The results show that the optimum control of rotational speed for maximizing energy capture below rated power can improve the dynamic stability by suppressing the axially unstable vibrations of the wind turbines. At above rated wind speed, the control mode of fixed-speed variable-pitch can cause unstable axial vibrations of the wind turbines; variable-speed variable-pitch can suppress the unstable vibrations. Additionally an appropriate time delay in pitch control can effectively enhance the dynamic stability of wind turbines.

Original languageEnglish
Title of host publicationProceedings of the 5th IEEE International Conference on Electric Utility Deregulation, Restructuring and Power Technologies, DRPT 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2581-2586
Number of pages6
ISBN (Electronic)9781467371063
DOIs
StatePublished - 11 Mar 2016
Event5th IEEE International Conference on Electric Utility Deregulation, Restructuring and Power Technologies, DRPT 2015 - Changsha, China
Duration: 26 Nov 201529 Nov 2015

Publication series

NameProceedings of the 5th IEEE International Conference on Electric Utility Deregulation, Restructuring and Power Technologies, DRPT 2015

Conference

Conference5th IEEE International Conference on Electric Utility Deregulation, Restructuring and Power Technologies, DRPT 2015
Country/TerritoryChina
CityChangsha
Period26/11/1529/11/15

Keywords

  • Control strategy
  • Dynamic stability
  • Pitch system
  • Time delay
  • Wind turbines

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