Nonlinear Current-Mode Control of SCIG Wind Turbines

Nicholas Hawkins, Bhagyashri Bhagwat and Michael L. McIntyre
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Nicholas Hawkins: Engineering Fundamentals, University of Louisville, Louisville, KY 40292, USA
Bhagyashri Bhagwat: Electrical and Computer Engineering, University of Louisville, Louisville, KY 40292, USA
Michael L. McIntyre: Electrical and Computer Engineering, University of Louisville, Louisville, KY 40292, USA

Energies, 2020, vol. 14, issue 1, 1-17

Abstract: In this paper, a nonlinear controller is proposed to manage the rotational speed of a full-variable Squirrel Cage Induction Generator wind turbine. This control scheme improves upon tractional vector controllers by removing the need for a rotor flux observer. Additionally, the proposed controller manages the performance through turbulent wind conditions by accounting for unmeasurable wind torque dynamics. This model-based approach utilizes a current-based control in place of traditional voltage-mode control and is validated using a Lyapunov-based stability analysis. The proposed scheme is compared to a linear vector controller through simulation results. These results demonstrate that the proposed controller is far more robust to wind turbulence than traditional control schemes.

Keywords: wind turbine control; nonlinear control; lyapunov; squirrel cage induction generator (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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