文档介绍：THESIS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY
Analysis, Modeling and Control of Doubly-Fed
Induction Generators for Wind Turbines
ANDREAS PETERSSON
Division of Electric Power Engineering
Department of Energy and Environment
CHALMERS UNIVERSITY OF TECHNOLOGY
,¨ Sweden 2005
Analysis, Modeling and Control of Doubly-Fed Induction
Generators for Wind Turbines
ANDREAS PETERSSON
ISBN 91-7291-600-1
c ANDREAS PETERSSON, 2005.
Doktorsavhandlingar vid Chalmers tekniska hogskola¨
Ny serie nr. 2282
ISSN 0346-718x
Division of Electric Power Engineering
Department of Energy and Environment
Chalmers University of Technology
SE-412 96 ¨
Sweden
Telephone + 46 (0)31-772 1000
Chalmers Bibliotek, Reproservice
,¨ Sweden 2005
Analysis, Modeling and Control of Doubly-Fed Induction Generators for Wind Turbines
ANDREAS PETERSSON
Division of Electric Power Engineering
Department of Energy and Environment
Chalmers University of Technology
Abstract
This thesis deals with the analysis, modeling, and control of the doubly-fed induction gener-
ator (DFIG) for wind turbines. Different rotor current control methods are investigated with
the objective of eliminating the influence of the back electromotive force (EMF), which is
that of, in control terminology, a load disturbance, on the rotor current. It is found that the
method that utilizes both feed forward of the back EMF and so-called “active resistance”
manages best to suppress the influence of the back EMF on the rotor current, particularly
when voltage sags occur, of the investigated methods. This method also has the best stability
properties. In addition it is found that this method also has the best robustness to parameter
deviations.
The response of the DFIG wind turbine system to grid disturbances is simulated and ver-
ified experimentally. A voltage sag to 80% (80% remaining voltage) is handled very well.
Moreover, a second-order model for prediction of the response of small voltage sags of th