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http://dx.doi.org/10.6113/JPE.2010.10.3.313

Reduction of Current Ripples due to Current Measurement Errors in a Doubly Fed Induction Generator  

Park, Gwi-Geun (AC Control 2 Group, AC Control R&D Lab, LG Electronics Inc.)
Hwang, Seon-Hwan (School of Electrical Eng., Pusan National University)
Kim, Jang-Mok (School of Electrical Eng., Pusan National University)
Lee, Kyo-Beum (Division of Electrical and Computer Eng., Ajou University)
Lee, Dong-Choon (Dept. of Electrical Eng., Yeungnam University)
Publication Information
Journal of Power Electronics / v.10, no.3, 2010 , pp. 313-319 More about this Journal
Abstract
This paper proposes a new compensation algorithm for the current measurement errors in a DFIG (Doubly Fed Induction Generator). Generally, current measurement path with current sensors and analog devices has non-ideal factors like offset and scaling errors. As a result, the dq-axis currents of the synchronous reference frame have one and two times ripple components of the slip frequency. In this paper, the main concept of the proposed algorithm is implemented by integrating the 3-phase rotor currents into the stationary reference frame to compensate for the measured current ripples in a DFIG. The proposed algorithm has several beneficial features: easy implementation, less computation time, and robustness with regard to variations in the electrical parameters. The effectiveness of the proposed algorithm is verified by several experiments.
Keywords
Current measurement errors; Current ripples; DFIG; Offset error; Scaling error;
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