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公开(公告)号：IT8320368D0
公开(公告)日：1983-03-30
申请号：IT2036883
申请日：1983-03-30
Applicant: UNITED TECHNOLOGIES CORP
Inventor： KOS JOSEPH MICHAEL , PATRICK JOHN PETER , HARNER KERMIT IVAN
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.
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公开(公告)号：IT8125807D0
公开(公告)日：1981-12-23
申请号：IT2580781
申请日：1981-12-23
Applicant: UNITED TECHNOLOGIES CORP
Inventor： PATRICK JOHN PETER , KOS JOSEPH MICHAEL , HARNER KERMIT IVAN
Abstract: A blade pitch angle control for a wind turbine-generator establishing an optimum power or torque reference signal which, when operating conditions so warrant, is not limited by the nominal torque or power ratings of various turbine generator components. The reference signal is indicative of a maximum blade angle setting for safe operation of the wind turbine. An integral or lag compensation circuit for enhanced transient and steady-state operation may be employed.
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公开(公告)号：FI792440A
公开(公告)日：1980-02-15
申请号：FI792440
申请日：1979-08-06
Applicant: UNITED TECHNOLOGIES CORP
Inventor： KOS JOSEPH MICHAEL , PATRICK JOHN PETER , HARNER KERMIT IVAN
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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公开(公告)号：NO178905B
公开(公告)日：1996-03-18
申请号：NO864564
申请日：1986-11-17
Applicant: UNITED TECHNOLOGIES CORP
Inventor： DOMAN GLIDDEN SWEET , KOS JOSEPH MICHAEL , HARNER KERMIT IVAN , DIVALENTIN EUGENE D , HEALY HENRY STEPHEN
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.
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公开(公告)号：DE69200406D1
公开(公告)日：1994-10-20
申请号：DE69200406
申请日：1992-03-26
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BRUUN EUGENE ROBERT , KOS JOSEPH MICHAEL
Abstract: A gas turbine engine bleed air system (10) in which air flow from a high pressure (HP) and a low pressure (LP) compressor stage of a gas turbine engine are mixed together, by controlling the pressure at the outlet of a proportional valve, (PRV) the pressure is controlled by modulating the flow area of the proportional valve (HPSOV) through which the high pressure air flows in order to achieve a scheduled pressure value, where the scheduled pressure value is determined as a function of a temperature error at a location downstream of the proportional valve (PRV) in the bleed air system.
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Patent Agency Ranking
公开(公告)号：FI89534C
公开(公告)日：1993-10-11
申请号：FI871872
申请日：1987-04-28
Applicant: UNITED TECHNOLOGIES CORP
Inventor： KOS JOSEPH MICHAEL , RAPP ALLEN FLOYD
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公开(公告)号：FI89533C
公开(公告)日：1993-10-11
申请号：FI864699
申请日：1986-11-18
Applicant: UNITED TECHNOLOGIES CORP
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公开(公告)号：FI89534B
公开(公告)日：1993-06-30
申请号：FI871872
申请日：1987-04-28
Applicant: UNITED TECHNOLOGIES CORP
Inventor： KOS JOSEPH MICHAEL , RAPP ALLEN FLOYD
Abstract: A variable speed wind turbine is controlled in a way which avoids the turbine lingering at a critical speed which would otherwise tend to cause excessive vibration. The disclosed method and apparatus increases speed at a selected rate with respect to generator output power except in the vicinity of the critical speed. The selected rate is changed in the vicinity of the critical speed to a different rate which is selected slower in the selected embodiment, to avoid commanding the critical speed. After the output power increases or decreases beyond the critical point, a deliberate discontinuity in the speed command signal is induced. A rapid speed change through the critical speed is accompanied by a corresponding power output change. If the speed is increasing at a selected slower rate below the critical speed, and the speed command signal is stepped to a higher level just before reaching the critical speed, the speed will rapidly increase and quickly pass through the critical speed while the power output decreases. Similarly, if the speed is decreasing at a selected slower rate above the critical speed, and the speed command signal is stepped to a lower level just before reaching the critical speed, the speed will rapidly decrease and quickly pass through the critical speed while the power output increases.
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公开(公告)号：DK159286B
公开(公告)日：1990-09-24
申请号：DK136583
申请日：1983-03-25
Applicant: UNITED TECHNOLOGIES CORP
Inventor： HARNER KERMIT IVAN , KOS JOSEPH MICHAEL , PATRICK JOHN PETER
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.
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公开(公告)号：IN166845B
公开(公告)日：1990-07-28
申请号：IN330CA1987
申请日：1987-04-27
Applicant: UNITED TECHNOLOGIES CORP
Inventor： KOS JOSEPH MICHAEL , RAPP ALLEN FLOYD
Abstract: A variable speed wind turbine is controlled in a way which avoids the turbine lingering at a critical speed which would otherwise tend to cause excessive vibration. The disclosed method and apparatus increases speed at a selected rate with respect to generator output power except in the vicinity of the critical speed. The selected rate is changed in the vicinity of the critical speed to a different rate which is selected slower in the selected embodiment, to avoid commanding the critical speed. After the output power increases or decreases beyond the critical point, a deliberate discontinuity in the speed command signal is induced. A rapid speed change through the critical speed is accompanied by a corresponding power output change. If the speed is increasing at a selected slower rate below the critical speed, and the speed command signal is stepped to a higher level just before reaching the critical speed, the speed will rapidly increase and quickly pass through the critical speed while the power output decreases. Similarly, if the speed is decreasing at a selected slower rate above the critical speed, and the speed command signal is stepped to a lower level just before reaching the critical speed, the speed will rapidly decrease and quickly pass through the critical speed while the power output increases.
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