Liao, Y. and Ran, L. and Putrus, G. A. and Smith, K. S. (2003) 'Evaluation of the effects of rotor harmonics in a doubly-fed induction generator with harmonic induced speed ripple.', IEEE transactions on energy conversion., 18 (4). pp. 508-515.
This paper is concerned with the low-frequency harmonics which originate from the rotor inverter of a doubly-fed induction generator (DFIG). By including the mechanical speed response, it expands the transformer approach previously taken to analyze the harmonic transfer in the machine. A numerical method is proposed to calculate the stator current sidebands, which can be used to predict the voltage fluctuation at the system busbar. It is shown that the pulsating torque associated with the rotor harmonics can induce speed ripple depending on the inertia, causing a significant change in the stator current spectrum. Experiment and simulation verify the analysis and the proposed calculation method.
|Keywords:||Modulation, Pulsating torque, Spectrum motor drives, Torsional vibrations.|
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|Publisher Web site:||http://dx.doi.org/10.1109/TEC.2003.816606|
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|Record Created:||27 May 2008|
|Last Modified:||24 May 2011 16:44|
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