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    24.
    发明专利
    未知

    公开(公告)号：NO832216L

    公开(公告)日：1983-12-23

    申请号：NO832216

    申请日：1983-06-20

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： HARNER KERMIT IVAN ,  PATRICK JOHN PETER ,  VOSSELER KENNETH FRANKLYN

    IPC: F03D7/02 ,  F03D7/04 ,  F03D

    Abstract: A blade feathering system for wind turbines includes a feather actuator (299), control means (330 and 335) operatively connected thereto and an adjustment means (340) operatively connected to the control means for selectively varying the rate of operation of the feather actuator for feathering the wind turbine blades (10 and 15) at a variable rate.

    25.
    发明专利
    未知

    公开(公告)号：DE3308566A1

    公开(公告)日：1983-10-13

    申请号：DE3308566

    申请日：1983-03-10

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： KOS JOSEPH MICHAEL ,  PATRICK JOHN PETER ,  HARNER KERMIT IVAN

    IPC: F03D7/04 ,  F03D7/02 ,  F03D13/20

    Abstract: An accelerometer (1) disposed on the support tower (12) of a wind turbine electric generating system in the vicinity of the rotor (10, 16) thereof provides a signal (1) indicative of acceleration of the tower in the direction of the rotor rotational axis. The signal (2) is passed through a band-pass filter (4) for summation (9) with a torque/power controlled (100) blade pitch angle reference rate signal (98), the integral (104) of which provides a blade pitch angle reference signal (40) to control the pitch angle of the rotor blades (10) through a pitch change mechanism (38), thereby to provide additional, positive aerodynamic damping to the tower while modulating blade angle for constant torque/power in response to wind turbulence.

    27.
    发明专利
    未知

    公开(公告)号：DK136683D0

    公开(公告)日：1983-03-25

    申请号：DK136683

    申请日：1983-03-25

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： HARNER KERMIT IVAN ,  KOS JOSEPH MICHAEL ,  PATRICK JOHN PETER

    IPC: F03D7/04 ,  F03D7/02 ,  F03D13/20 ,  F03D

    Abstract: Damping of the primary bending mode of a tower (12) mounting a wind turbine having a control (36) for providing a pitch blade angle reference signal (40) to modulate the pitch of the turbine blades (1) through a pitch change mechanism (38) for constant power is provided by generating the pitch blade angle reference signal as the integral (104) of the summation (266) of a torque/power controlling blade pitch angle reference rate signal (98) with an estimated acceleration signal (255) generated by filtering (250, 252, 254) the blade pitch angle reference signal (40) with the following transfer function

    MULTI-MODE CONTROL SYSTEM FOR WIND TURBINES
    28.
    发明专利
    MULTI-MODE CONTROL SYSTEM FOR WIND TURBINES 未知

    公开(公告)号：DE2961688D1

    公开(公告)日：1982-02-18

    申请号：DE2961688

    申请日：1979-08-02

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： KOS JOSEPH MICHAEL ,  HARNER KERMIT IVAN ,  PATRICK JOHN PETER

    IPC: F03D9/00 ,  F03D7/02 ,  F03D7/04 ,  H02P9/04 ,  G05D3/00

    Abstract: A multi-mode electronic wind turbine control system establishes a reference blade angle BR for a two-bladed, horizontal axis, variable pitch wind turbine rotor, the blade angle being regulated by a hydraulic pitch change mechanism (38). The rotor (10), via appropriate shafts and a gearbox (20), is coupled to a synchronous generator (24) to produce electrical energy which is fed to a power utility grid. The control system (36) provides closed loop pitch control for rotor acceleration rate during start-up, for rotor deceleration rate during shut-down, 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.

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