Grid-connected and control of MPPT for wind power generation systems based on the SCIG

This paper adopts a main circuit structure with back-to-back PWM converter, in which generator-side using direct torque control method, and grid-side adopts three-phase VSR inner current decoupling control based feed forward control algorithms, and this paper proposes an improved MPPT control methods, which can achieves more quickly and effectively tracking the maximum power. Finally, the effectiveness of the new control method is verified by simulation in the Matlab/Simulink environment, and the simulation results confirm that the DC side voltage keep constantly and achieves unity power factor in grid-connected.