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Control of DFIG based wind generation systems under unbalanced network supply

Wang, Yi and Xu, L. (2007) Control of DFIG based wind generation systems under unbalanced network supply. In: IEEE IEMDC 2007. IEEE, New York, pp. 430-435. ISBN 9781424407422

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Abstract

This paper develops a dynamic model and control scheme for DFIG systems to improve the performance and stability under unbalanced grid conditions. A dynamic DFIG model containing the positive and negative sequence components is presented using stator voltage orientation. The proposed model accurately illustrates the active power, reactive power and torque oscillations, and provides a basis for DFIG control system design during unbalanced network supply. Various control targets such as eliminating the oscillations of the torque, active/reactive power are discussed and the required rotor negative sequence current for fulfilling different control targets are described. Performance of a DFIG-based wind turbine under unbalanced condition using the proposed control method is evaluated by simulation studies using Matlab/Simulink. The proposed control scheme significantly attenuates the DFIG torque or active power oscillations during network unbalance whereas significant torque/power oscillations exist with the conventional control schemes.

Item type: Book Section
ID code: 36855
Keywords: wind turbines , power system modeling, control system synthesis , control systems , dfig-based wind generation systems, wind generation systems, dfig-based, unbalanced network supply, Electrical engineering. Electronics Nuclear engineering, Energy Engineering and Power Technology
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Depositing user: Pure Administrator
Date Deposited: 19 Jan 2012 12:34
Last modified: 15 Apr 2015 11:15
URI: http://strathprints.strath.ac.uk/id/eprint/36855

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