Comparative Study Between Fuzzy and Sliding Mode Control Based on a BDFIG

Abstract

Brushless doubly fed induction (BDFIG) is one of the best solutions of the previous research efforts about wind-power converter, which is represented by the absence of a brush gear and less maintenance cost, especially in the harsh regions. This task presents a comparative evaluation between a sliding mode and Fuzzy control. It demonstrates also the robustness of these two regulators against supply voltage and load disturbances. Furthermore, we have shown the undesirable phenomenon of oscillations having a finite frequency and amplitude, which is known as ‘chattering’ resulted from a sliding mode control which is based on Lyapunov approach theorem. The control of the system and BDFIG are both integrated in variable speed wind energy conversion. The performances of these control systems have been tested and analyzed in Matlab Simulink.

Robust nonlinear control of wind turbine driven doubly fed induction generators

“…The power inverter needs to handle a fraction (20-30%) of the total power to achieve full control of the generator. Recently, several nonlinear controls laws based a DFIG are presented in literatures such as sliding mode control (SMC) technique [2], [3]. However, the major problem of this strategy of control is the chattering phenomenon caused by the control switching, which may have undesirable effects on the machine, such as overheating of the windings, torque pulsation, current harmonics, acoustic noise, etc.…”