Resonant-Based Backstepping Direct Power Control Strategy for DFIG Under Both Balanced and Unbalanced Grid Conditions

This paper proposes a resonant-based backstepping direct power control (BS-DPC) strategy for doubly-fed induction generator (DFIG) under both balanced and unbalanced grid conditions. Proper formulae for the BS-DPC strategy are obtained based on the elaborated analysis of the mathematical model of DF...

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Bibliographic Details
Published in:IEEE transactions on industry applications 2017-09, Vol.53 (5), p.4821-4830
Main Authors: Xiaohe Wang, Dan Sun, Zhu, Z. Q.
Format: Article
Language:English
Subjects:
Backstepping
Backstepping (BS) control
Control systems
doubly-fed induction generator (DFIG)
Mathematical model
Power control
Reactive power
resonant controller
Rotors
Stators
unbalanced grid condition
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Summary:This paper proposes a resonant-based backstepping direct power control (BS-DPC) strategy for doubly-fed induction generator (DFIG) under both balanced and unbalanced grid conditions. Proper formulae for the BS-DPC strategy are obtained based on the elaborated analysis of the mathematical model of DFIG. The influence of the unbalanced grid voltage on the normal BS-DPC is analyzed. Furthermore, a resonant-based improved strategy is proposed to achieve different control targets under unbalanced grid condition without the need of decomposition of positive- and negative-sequence components. Comparative experimental studies of the resonant-based BS-DPC and the normal BS-DPC for DFIG are conducted to validate the effectiveness of the proposed strategy under both balanced and unbalanced grid conditions. In addition, the experimental results also prove that the proposed resonant-based BS-DPC can achieve a satisfying transient performance.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2017.2700280