Abstract
High efficiency and reliability are two desirable features for wind energy conversion systems. In this regard, multiphase machines provide inherent fault-tolerance and better power density than conventional three-phase systems. From the point of view of the reliability, multiphase machines can provide a natural/passive fault-tolerance without a mandatory control reconfiguration. For that purpose, the control of the x-y current must be realized in open-loop mode. A recent model predictive control based on virtual voltage vectors (VV-MPC) has satisfactory validated this fact. On the other hand, efficiency can be enhanced with the implementation of a variable-flux control that reduces the copper losses. In order to satisfy the requirements of new wind energy conversion systems, this work proposes an efficient model predictive control based on virtual voltage vectors (EVV-MPC) with a natural fault tolerance for six-phase induction machines (IM). Simulation results confirm the capability of the proposed system to minimize the cooper losses in pre- and post- fault situation without control reconfiguration.
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