Comparative study of power converter topologies using in wind energy conversion system based on DFIG

This paper studies the performance of three power converters topologies: multi-levels back-to back, direct and indirect matrix converter, where are tested in variable speed wind energy conversion system (WECS) based on doubly fed induction generator (DFIG) for purpose to ensure the control of active and reactive power transferred between the electric grid and DFIG. predictive current control (PCC) presents a fast-dynamic response and accurate reference tracking, where is based on the discrete system model and on the fact that a finite number of possible switching states can be generated by power converter. The PCC applied all different voltages and selects the switching combinations that minimize the error between the predictions current and reference. The optimal voltage vector that minimizes the cost function is applied in next sample time in order to correct the dynamic response of the rotor current. Simulation results based on the electric behavior for the power and the current at the output of the converters are analyzed and discussed.