For ultra-high-power offshore wind turbines of 5 MW or above

the current medium and low-voltage technology solutions make generators and converters withstand large currents

which causes the low efficiency of wind power systems. A structure of a high-voltage permanent magnet multi-phase generator with reactive power feed windings is briefly described. This new structure can directly realize high-voltage direct current(HVDC)by using series unipolar converters with simple topology. Besides

the injection of reactive power into the generator with reactive feed windings can realize the decoupling control of the generator excitation and torque. In addition

the new technical solution can also be used to inhibition the peak short-circuit current when the HVDC transmission line is short-circuit. The paper focuses on the steady state characteristics of the generator. Firstly

the mathematical model of the stator multi-winding synchronous generator is deduced

and then the steady-state characteristics of the generator in the new technical scheme are analyzed by numerical calculation method using related parameters of a 6. 7 MVA wind turbine.