Specifications

Author affiliation:
1 Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an
Shaanxi 710048, China
Corresponding author: Liu, J. ([e-mail])
Source title: Kongzhi Lilun Yu Yingyong/Control Theory and Applications
Abbreviated source title: Kong Zhi Li Lun Yu Ying Yong
Volume: 29
Issue: 10
Issue date: October 2012
Publication year: 2012
Pages: 1331-1338
Language: Chinese
ISSN: 10008152
CODEN: KLYYEB
Document type: Journal article (JA)
Publisher: South China University of Technology, Guangzhou, 510640, China
Abstract: To inhibit the imbalance current in the stator and the rotor caused by the
unbalanced grid voltage, we propose a passivity control strategy for the double-fed induction
generator system (DFIG). On the basis of the passivity of the positive and negative sequence
models in the positive synchronously rotating frame, a passivity state feedback controller is first
designed. Next, a method for calculating expectation values is developed, by which we calculate
the command values for the negative sequence components of the stator current and the rotor
current based on the unbalanced control objectives. The command values of the positive
sequence components of the stator current and the rotor current are calculated on the basis of
positive sequence components of the stator voltage and the expectation values of the
electromagnetic torque. Thus, a passive controller for DFIG under unbalance grid voltage
condition is designed. Simulation results show that the proposed scheme effectively inhibits the
imbalance currents in the stator and the rotor, reduces the output torque fluctuation, and
enhances the non-interrupt operation ability of DFIG under unbalanced grid voltages.
Number of references: 15
Main heading: Rotors (windings)
Controlled terms: Asynchronous generators - State feedback - Stators
Uncontrolled terms: Control objectives - Double fed induction generator -
Electromagnetic torques - Expectation values - Grid voltage - Negative sequence -
Output torque - Passive controllers - Passivity based control - Passivity control -
Positive-sequence components - Rotating frame - Rotor current - State feedback
controller - Stator currents - Stator voltages
Classification code: 704.1 Electric Components - 705.1 Electric Machinery, General -
705.2.1 AC Generators - 731.1 Control Systems
Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc.
5.
Accession number: 20130215877001
Title: Single-channel color image encryption based on iterative fractional Fourier