Effect of the shaft stiffness on the inertial response of the fixed speed wind turbines and its contribution to the system inertia

Francisco González-Longatt, Pawel Regulski, Happy Novanda, Vladimir Terzija

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

1 Citation (Scopus)

Abstract

Future power system faces several challenges; one of them is the high penetration level of intermittent wind power generation, which provide small or even no inertia response, not contributing to the frequency stability. In this paper, the effect of the shaft stiffness on the inertial response of the fixed speed wind turbines and its contribution to the system inertia is presented. Four different drivetrain models based on the Multi-body System are presented in this paper. The small-signal analysis of them demonstrated no significant difference between models in terms of electro-mechanical eigen-values for increasing of shaft stiffness. The natural resonance frequency of the torsional modes of the drivetrain show slightly different values between damped and undapmped models but not significant differences are found in the number-mass model. Time-domain simulations show the changes in the active power contribution of a wind farm based on fixed speed wind turbine during system frequency disturbance. The changes in the kinetic energy during the dynamic process have been calculated and their contribution to the inertia constant has been found small but effective. The largest contribution of the kinetic energy is provided at the very beginning of the system frequency disturbance helping to reduce the Rate of Change of Frequency, which is positive for the frequency stability.

Original languageEnglish
Title of host publicationAPAP 2011 - Proceedings
Subtitle of host publication2011 International Conference on Advanced Power System Automation and Protection
Pages1170-1175
Number of pages6
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event2011 International Conference on Advanced Power System Automation and Protection, APAP 2011 - Beijing, China
Duration: 16 Oct 201120 Oct 2011

Publication series

NameAPAP 2011 - Proceedings: 2011 International Conference on Advanced Power System Automation and Protection
Volume2

Conference

Conference2011 International Conference on Advanced Power System Automation and Protection, APAP 2011
Country/TerritoryChina
CityBeijing
Period16/10/1120/10/11

Keywords

  • induction generator
  • inertial response
  • sub-synchronous oscillation
  • wind energy
  • wind power
  • wind turbine

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