Sensorless variable-speed controller for existing fixed-speed wind power generator with unity-power-factor operation
Poddar, G.
Joseph, A.
Unnikrishnan, A.K.
Power Electron. Group, Electron. R&D Centre of India, Trivandrum, India;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Oct. 2003
Volume: 50,
Issue: 5
On page(s): 1007- 1015
ISSN: 0278-0046
INSPEC Accession Number: 7757105
Digital Object Identifier: 10.1109/TIE.2003.817689
Current Version Published: 2003-10-07
Abstract
A variable-speed controller, for an existing 225 kW fixed-speed wind power generator, is presented in this paper. A sensorless direct torque control algorithm-based controller is proposed for the squirrel-cage induction generator. Generator torque reference is derived based on sensorless maximum power tracking mode algorithm, up to the base speed of the generator. A three-phase front-end converter is used here to deliver the generated power to the grid with unity-power-factor operation at all wind speeds. This algorithm is based on direct active and reactive power control. The experimental waveforms from the actual installation site are presented in this paper with a comparison of the existing fixed-speed system. An interpretation of the results is also presented here.
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