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Received: 2005-09-12

Revision Accepted: 2005-12-25

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Cited: 6

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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.10 P.1757~1764


Dynamic modelling and robust current control of wind-turbine driven DFIG during external AC voltage dip

Author(s):  HU Jia-bing, HE Yi-kang

Affiliation(s):  Department of Electrical Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   emec_zju@zju.edu.cn

Key Words:  Wind energy generation, Variable-Speed Constant-Frequency (VSCF), Doubly-Fed Induction Generator (DFIG), Fault Ride-Through (FRT), Internal Model Control (IMC)

HU Jia-bing, HE Yi-kang. Dynamic modelling and robust current control of wind-turbine driven DFIG during external AC voltage dip[J]. Journal of Zhejiang University Science A, 2006, 7(10): 1757~1764.

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author="HU Jia-bing, HE Yi-kang",
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%T Dynamic modelling and robust current control of wind-turbine driven DFIG during external AC voltage dip
%A HU Jia-bing
%A HE Yi-kang
%J Journal of Zhejiang University SCIENCE A
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%D 2006
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.A1757

T1 - Dynamic modelling and robust current control of wind-turbine driven DFIG during external AC voltage dip
A1 - HU Jia-bing
A1 - HE Yi-kang
J0 - Journal of Zhejiang University Science A
VL - 7
IS - 10
SP - 1757
EP - 1764
%@ 1673-565X
Y1 - 2006
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2006.A1757

doubly-Fed Induction Generator (DFIG), with vector control applied, is widely used in variable-Speed Constant-Frequency (VSCF) wind energy generation system and shows good performance in maximum wind energy capture. But in two traditional vector control schemes, the equivalent stator magnetizing current is considered invariant in order to simplify the rotor current inner-loop controller. The two schemes can perform very well when the grid is in normal condition. However, when grid disturbance such as grid voltage dip or swell fault occurs, the control performance worsens, the rotor over current occurs and the fault Ride-Through (FRT) capability of the DFIG wind energy generation system gets seriously deteriorated. An accurate DFIG model was used to deeply investigate the deficiency of the traditional vector control. The improved control schemes of two typical traditional vector control schemes used in DFIG were proposed, and simulation study of the proposed and traditional control schemes, with robust rotor current control using internal Model Control (IMC) method, was carried out. The validity of the proposed modified schemes to control the rotor current and to improve the FRT capability of the DFIG wind energy generation system was proved by the comparison study.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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