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Control strategy for doubly fed induction machine base on state feedback
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| Author(s) |
R. Peña; R. Cárdenas; D. Soto; J. Proboste; R. Blasco-Gimenez |
| Abstract |
The standard approach for the vector control of either the stator or rotor currents in doubly fed
induction machines uses PI controller to process the d-q current error. Compensation terms are then
added to the output of each controller to generate the reference voltage signal for the rotor side PWM
converter. A synchronous rotating frame aligned with the stator flux or the stator voltage can be used
with similar results. When the d-q rotor/estator currents are controlled then the stator/rotor current
dynamics remain uncontrolled. The uncontrolled currents present oscillations with none or poor
damping. In this paper, in order to have a full control of the stator and rotor currents and
correspondingly improve the dynamics of the stator and rotor currents a scheme based on state
feedback is presented. Integral compensation is added in order to assure zero steady state error for
either the stator or rotor current control for step reference changes. Provided that the augmented
system is controllable then the dynamics of the currents can be set by a pole position procedure and
therefore the current oscillations can be eliminated. The modelling and simulation results are
presented. The strategy has been used to control the electrical torque of a doubly–fed induction
machine driven by a variable speed wind turbine in order to maximise the energy capture. |
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| Filename: | EPE2003-PP1078 - Pena |
| Filesize: | 263.3 KB |
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| Type |
Members Only |
| Date |
Last modified 2003-10-30 by Unknown |
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