Research on direct power control of pumped storage doubly-fed Induction machine for power generation operation based on a novel three-vector model prediction

Aiming at the characteristics of variable-speed pumped-storage doubly-fed Induction machine, an improved model pridictive direct power control method with three vectors is proposed in this paper. This method allocates one control cycle to two non-zero vectors and one zero vector, which effectively reduces the power pulsation and the Total Harmonic Distortion (THD) of the stator and rotor currents by allocating the action time of the non-zero vectors. In this paper, the modulation method of three-vector model pridictive direct power control is given by considering delay compensation on this basis. Simulation experiments show that compared with the traditional single-vector and two-vector model pridictive direct power control methods, the three-vector model pridictive direct power control has a better steady-state performance, the THD of the current is smaller, and it can carry out the active and reactive power control more flexibly, which provides a high- performance solution for the doubly-fed Induction machine system of pumped storage.