Impedance modeling of DFIG-wind turbine system

Xiaozhong Liao, Hang Sun, Zhen Li, Siu Chung Wong, Li Tian, Miaoyuan Wang, Xiangdong Liu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


The DFIG-wind turbine, can create the potential instability to the existent power grid, equivalently presenting itself as a random voltage source with its dynamic impedance, which has the implicit and varying electrical characteristics with the changeable rotor speed. Thus, it inevitably leads to the mutual interaction between DFIG-wind turbines themselves and dynamic custom loads. This paper studies the closed-form impedance analysis of a practical DFIG-wind turbine system. A small-signal model of the DFIG system in the dq-frame is developed with respect to discrete rotor speeds using the impedance-based approach. Moreover, a practical testing method is adopted to facilitate the verification of the impedance modeling.
Original languageEnglish
Title of host publication2015 IEEE International Symposium on Circuits and Systems, ISCAS 2015
Number of pages4
ISBN (Electronic)9781479983919
Publication statusPublished - 1 Jan 2015
EventIEEE International Symposium on Circuits and Systems, ISCAS 2015 - Lisbon, Portugal
Duration: 24 May 201527 May 2015


ConferenceIEEE International Symposium on Circuits and Systems, ISCAS 2015


  • Doubly fed induction generator (DFIG)
  • impedance modeling
  • wind turbine

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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