Authors: Umashankar S, Ambili Mathew, Kothari D P, Vijayalumar D
This paper presents the indirect vector control for induction generator driven by a variable speed wind turbine. In wind power induction generator as the input wind is not constant and is not controllable, the induction generator should be provided with specific control strategies so that the dc link voltage is maintained constant irrespective of the variation in wind speed. In this vector control method, direct axis current component is controlled by controlling flux and quadrature axis current component is controlled by controlling torque. A PI-controller is used to process the error values i.e. the difference between the reference values and the measured values. These direct and quadrature axis components of current are converted to three phase quantities with help of unit vector. This reference three phase currents is given to pwm converter which will produce the pulses. In this way, the dc bus voltage is maintained constant irrespective of variation in the wind speed. The proposed system is simulated using MATLAB/Simulink software.
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[v1] 2014-05-07 05:10:39
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