公开(公告)号：CA1258092A

公开(公告)日：1989-08-01

申请号：CA522369

申请日：1986-11-06

Applicant: UNITED TECHNOLOGIES CORP

Inventor： DOMAN GLIDDEN S ,  KOS JOSEPH M ,  HARNER KERMIT I ,  DIVALENTIN EUGENE ,  HEALY HENRY S

IPC: F03D7/04 ,  F03D7/02 ,  F03D9/00 ,  H02P9/42

Abstract: A VARIABLE SPEED WIND TURBINE 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.

公开(公告)号：NO814360A

公开(公告)日：1982-06-25

申请号：NO814360

申请日：1981-12-21

Applicant: UNITED TECHNOLOGIES CORP

Inventor： PATRICK JOHN P ,  KOS JOSEPH M ,  HARNER KERMIT I

IPC: F03D7/04 ,  F03D7/02 ,  F03D

CPC classification number: F03D7/0224 ,  F05B2270/1032 ,  F05B2270/1033 ,  F05B2270/32 ,  Y02E10/723

公开(公告)号：CA1120538A

公开(公告)日：1982-03-23

申请号：CA330730

申请日：1979-06-27

Applicant: UNITED TECHNOLOGIES CORP

Inventor： KOS JOSEPH M ,  PATRICK JOHN P ,  HARNER KERMIT I

IPC: F03D9/00 ,  F03D7/02 ,  F03D7/04 ,  H02P9/04 ,  F03D7/00

Abstract: U. S. Ser. No. 934,65 MULTI MODE CONTROL SYSTEM FOR WIND TURBINES A multi-mode electronic wind turbine control system establishes a reference blade angle for a two-bladed, horizontal axis, variable pitch wind turbine rotor, the blade angle being regulated by a hydraulic pitch change mechanism. The rotor, via appropriate shafts and a gearbox, is coupled to a synchronous generator to produce electrical energy which is fed to a power utility grid. The control system provides closed loop pitch control for rotor acceleration rate during start-up, for rotor deceleration rate during shutdown, for speed control when the synchronous generator is off-line, and for power control when the synchronous generator is on-line. A single control integrator is used for all closed loop operating modes, with a rate limiter circuit in front of the control integrator to prevent integrator overtravel. The integrator has maximum and minimum blade angle stops, the minimum stop being variable as a function of rotor speed and wind speed. When on-line, power control is provided by a unique shaft torque control using proportional plus integral plus derivative controls in combination. H893-CC