Research of wind power system mathematical model based on a quadrupole six-phase electric excitation synchronous generator

This paper deals with the modeling of the semi-direct drive type wind power generator of a wind farm at Chongqing. The mathematic model of the quadrupole six-phase electric excitation synchronous generator in dq0 reference frame is presented, as well as the simplified model of rectifier-inverter. Taking the regional grid into consideration, the dynamic model of the overall wind farm is then obtained. As for control strategies, excitation voltage control is adopted to maintain the DC voltage constant, and the PWM inverter is controlled to realize zero reactive power output and the maximum power point tracking (MPPT). Finally, the simulation model of the wind power system is established based on Matlab. Operation performance at different wind conditions is simulated and analysised. The simulation results verify the validity of the proposed model and employed control strategies.