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Maximum power point tracker for wind energy generation systems using matrix converters

This paper presents an optimum speed control system for wind energy generation systems equipped with Doubly Fed Induction Generators (DFIG) and Matrix Converters (MC). The MC controls the rotor currents and guarantees the optimum speed of the generator necessary to extract the maximum energy from the wind (MPPT-Maximum Power Point Tracking). The Stator Flux Oriented Control (SFOC), together with the Sliding Mode Control (SMC) and the MC Space Vector representation technique guarantee nearly unitary power factor in the connection to the grid. The results show the proposed method presents good results for variable wind speed below the nominal power, and is more accurate in terms of MPPT than the torque control technique.