A variable speed wind turbine includes a frequency converter which converts variable frequency AC from a turbine driven AC generator to fixed frequency AC for delivery to a power grid. The frequency converter is typically an electronic cycloconverter or rectifier-inverter and is also used to control the power flow from the AC generator to the grid which thereby controls the air gap torque between the generator stator and rotor. The turbine speed is maneuvered to increase efficiency by precisely controlling the air gap torque according to a schedule defining sensed generator speed versus sensed generated power.
申请公布号
US4695736(A)
申请公布日期
1987.09.22
申请号
US19850799045
申请日期
1985.11.18
申请人
UNITED TECHNOLOGIES CORPORATION
发明人
DOMAN, GLIDDEN S.;KOS, JOSEPH M.;HARNER, KERMIT I.;DIVALENTIN, EUGENE D.;HEALY, HENRY S.