Fast Coordinated Control of DFIG Wind Turbine Generators for Low and High Voltage Ride-Through

Yun Wang, Qiuwei Wu, Honghua Xu, Qinglai Guo, Hongbin Sun

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Abstract

This paper presents a fast coordinated control scheme of the rotor side converter (RSC), the DC chopper and the grid side converter (GSC) of doubly fed induction generator (DFIG) wind turbine generators (WTGs) which is to improve the low voltage ride through (LVRT) and high voltage ride through (HVRT) capability of the DFIG WTGs. The characteristics of DFIG WTGs under voltage sags and swells were studied focusing on the DFIG WTG stator flux and rotor voltages during the transient periods of grid voltage changes. The protection schemes of the rotor crowbar circuit and the dc chopper circuit were proposed considering the characteristics of the DFIG WTGs during voltage changes.
The fast coordinated control of RSC and GSC were developed based on the characteristic analysis in order to realize efficient LVRT and HVRT of the DFIG WTGs. The proposed fast coordinated control schemes were verified by time domain simulations using MATLAB-Simulink.
Original languageEnglish
JournalEnergies
Volume7
Issue number7
Pages (from-to)4140-4156
ISSN1996-1073
DOIs
Publication statusPublished - 2014

Keywords

  • Coordinated control
  • Doubly-fed induction generator (DFIG)
  • Grid side converter (GSC)
  • High voltage ride through (HVRT)
  • Low voltage ride through (LVRT)
  • Rotor side converter (RSC)

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