Application of Passivity-Based Control and Time-Frequency Representation in a Doubly Fed Induction Generator System

In order to improve the performance of a doubly fed induction generator (DFIG) system, we put forward a high performance nonlinear passivity-based control (PBC) method on DFIG. Firstly, we build a PBC mathematical model for DFIG. We design the passive controller for the inner loop in the control sys...

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Bibliographic Details
Published in:Mathematical problems in engineering 2015-01, Vol.2015 (2015), p.1-9
Main Authors: Liu, Yingpei, Liang, Haiping
Format: Article
Language:English
Subjects:
Active control
Construction
Continuous wavelet transform
Control systems
Control systems design
Controllers
Design
Electric potential
Energy distribution
Expected values
Induction generators
Mathematical models
Methods
Nonlinear control
Performance enhancement
Reactive power
Representations
Rotor speed
Time series
Time-frequency analysis
Turbines
Wavelet transforms
Wind power
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Summary:In order to improve the performance of a doubly fed induction generator (DFIG) system, we put forward a high performance nonlinear passivity-based control (PBC) method on DFIG. Firstly, we build a PBC mathematical model for DFIG. We design the passive controller for the inner loop in the control system based on passivity theory. Then we calculate the rotor’s control voltages which are modulated afterwards to pulse to control the rotor side converter. The maximal wind energy capture is effectively realized. The rotor speed and DFIG currents fast track their expected values. The independent regulation of the stator active power and reactive power is achieved. Finally we perform simulations to verify the effectiveness of the proposed method. Furthermore, we employ the Wigner-Ville distribution (WVD) and continuous wavelet transform (CWT) as two time-frequency representation methods to indicate that the proposed method in the paper performs well from the perspective of energy distribution in time and frequency domain.
ISSN:1024-123X
1563-5147
DOI:10.1155/2015/371578