Abstract: Model predictive control is widely used in multiphase motor control system due to its advantages such as simple principle, fast response speed and easy handling of nonlinear constraints. However, the harmonic current caused by nonlinear factors such as motor air gap magnetic field distortion and dead-time of rectifier switching devices, especially the harmonic current mapped to harmonic subspace, will increase the system losses and affect the performance of power generation system. In order to suppress the harmonic currents in the stator winding of the dual three-phase permanent magnet synchronous generator, the existing twelve virtual vectors are further extended. Although the number of candidate voltage vectors in the control set is increased, the computational complexity is not increased. The proposed extended virtual vector model predictive current control not only effectively reduces the stator current harmonics, but also improves the operation performance of the power generation system. Finally, the feasibility and superiority of the proposed control strategy are verified by experiments.