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Rotor‐reference‐current‐oriented control strategy for low‐voltage ride‐through of DFIG
Author(s) -
Teng Weijun,
Meng Yongqing
Publication year - 2018
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.22708
Subject(s) - low voltage ride through , stator , rotor (electric) , transient (computer programming) , control theory (sociology) , ac power , wind power , engineering , power (physics) , voltage , matlab , doubly fed electric machine , induction generator , computer science , electrical engineering , control (management) , physics , quantum mechanics , artificial intelligence , operating system
With increasing capacity of wind power in the power system, the doubly fed induction generator (DFIG) is required to meet the low‐voltage ride‐through (LVRT) capability. In this paper, a rotor‐reference‐current‐oriented control strategy (RRCOCS) of the rotor‐side converter (RSC) is proposed to enhance the LVRT capability of DFIG. According to the magnitude of the rotor current and the DC voltage of converter, RRCOCS aligns the rotor reference current of the control system of the RSC with the stator current or the opposite direction of stator current, resulting in reduction of the transient rotor current and DC voltage of the converter. Thereby, RRCOCS helps in relieving the transient current stress on the RSC and maintaining uninterrupted active and reactive power supply from the wind turbines to the power grid without additional hardware. The effectiveness of RRCOCS is demonstrated through various simulation cases with the DFIG model of MATLAB/Simulink. As we show, compared to the traditional control strategy (TCS), RRCOCS can improve the LVRT capability of DFIG significantly. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.