DFIG sliding mode control fed by back-to-back PWM converter with DC-link voltage control for variable speed wind turbine

Abstract

This paper proposes an indirect power control of doubly fed induction generator (DFIG) with the rotor connected to the electric grid through a back-to-back pulse width modulation (PWM) converter for variable speed wind power generation. Appropriate state space model of the DFIG is deduced. An original control strategy based on a variable structure control theory, also called sliding mode control, is applied to achieve the control of the active and reactive power exchanged between the stator of the DFIG and the grid. A proportional-integral-(PI) controller is used to keep the DC-link voltage constant for a back-to-back PWM converter. Simulations are conducted for validation of the digital controller operation using Matlab/Simulink software.

Keywords

doubly fed induction generator (DFIG) / wind turbine / back-to-back pulse width modulation (PWM) / DC-link voltage / sliding mode control

References

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Higher Education Press and Springer-Verlag Berlin Heidelberg