Prime-mover dynamo plants – Electric control – Fluid-current motors
Patent
1985-11-18
1987-09-22
Shoop, Jr., William M.
Prime-mover dynamo plants
Electric control
Fluid-current motors
290 55, 322 35, 322 28, F03D 902
Patent
active
046957367
ABSTRACT:
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.
REFERENCES:
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patent: 4161658 (1979-07-01), Patrick
patent: 4189648 (1980-02-01), Harner
patent: 4193005 (1980-03-01), Kos et al.
patent: 4330743 (1982-05-01), Glennon
patent: 4400659 (1983-08-01), Barron et al.
patent: 4503673 (1985-03-01), Schachle et al.
patent: 4525633 (1985-06-01), Wertheim et al.
patent: 4584486 (1986-04-01), Quynn
"Variable Rotor Speed for Wind Turbines", by EPRI Electric Power Research Institute AP-4261 (9/85).
DiValentin Eugene D.
Doman Glidden S.
Harner Kermit I.
Healy Henry S.
Kos Joseph M.
Ip Shik Luen Paul
Maguire, Jr. Francis J.
Shoop Jr. William M.
United Technologies Corporation
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