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- Nachgewiesen in: USPTO Patent Applications
- Sprachen: English
- Document Number: 20150337806
- Publication Date: November 26, 2015
- Appl. No: 14/758578
- Application Filed: February 07, 2013
- Claim: 1. A method of controlling a wind turbine by means of a wind turbine control system comprising a first controller and a second controller, said controlling of said wind turbine comprising handling a first set of control functionalities and a second set of control functionalities, wherein said first set of control functionalities are non-critical control functionalities, wherein said second set of control functionalities comprises one or more critical control functionalities which are critical for the operation of said wind turbine, wherein said first controller handles said first set of control functionalities, wherein said second controller is a safety controller controlling said wind turbine during emergency shutdown of said wind turbine by means of said critical control functionalities, and wherein said second controller furthermore controls one or more of said critical control functionalities to provide an output to control said wind turbine when the wind turbine is in a power production mode.
- Claim: 2. A method according to claim 1, wherein said second set of control functionalities are critical to control the mechanical loads of said wind turbine.
- Claim: 3. A method according to claim 1, wherein said second controller operates at a higher safety level than said first controller.
- Claim: 4. (canceled)
- Claim: 5. A method according to claim 1, wherein said second controller comprises a data input arrangement receiving one or more data inputs, data processing means processing data from said one or more data inputs, and a data output arrangement providing data to one or more data outputs from said second controller based on said processing of said one or more data inputs, and wherein said data processing means of said second controller comprises at least two processing arrangements each processing input representing the same data according to an identical set of rules, and a verifying arrangement selecting an output from at least one of said processing arrangements to form the basis for the data on output at said data output arrangement.
- Claim: 6. A method according to claim 1, wherein said second controller processes data from at least two data inputs which data represents the same information, and wherein the information is obtained from different data sources.
- Claim: 7. (canceled)
- Claim: 8. A method according to claim 1, wherein said second controller operates in accordance with one or more reference parameters, and wherein one or more software applications are configured for processing data inputs in accordance with said reference parameters so as to provide data output from said second controller.
- Claim: 9. A method according to claim 1, wherein said second controller shifts from a first operation mode to an emergency shutdown mode if said wind turbine is to be shut down due to an emergency situation.
- Claim: 10. (canceled)
- Claim: 11. A method according to claim 7, wherein said shift comprises replacing the content of one or more reference parameters and/or utilizing a set of dedicated emergency reference parameters.
- Claim: 12. A method according to claim 7, wherein said shift comprises shifting to an emergency pitch mode configured for pitching one or more of said wind turbine blades so as to shut down said wind turbine, and wherein said second controller provides one or more pitch outputs determined by means of said emergency pitch mode to one or more pitch arrangements of said wind turbine.
- Claim: 13. A method according to claim 1, wherein pitching by means of said second controller is performed according to one or more data inputs from one or more measurement arrangements during said emergency shutdown.
- Claim: 14. A method according to claim 7, wherein said shift comprises shifting to an emergency torque scenario for reducing a torque in said wind turbine, and wherein said second controller provides a torque adjustment output determined by means of said emergency torque scenario according to one or more data inputs from one or more measurement arrangements during said emergency shutdown.
- Claim: 15. (canceled)
- Claim: 16. A method according to claim 1, wherein said second controller comprises software code for processing input data so as to provide data outputs from said second controller, and wherein said software code is utilized for handling said critical control function during both normal operation to provide a power output, and during emergency shutdown of said wind turbine.
- Claim: 17. (canceled)
- Claim: 18. A method according to claim 1, wherein said second controller provides one or more outputs based on one or more of said one or more critical control functionalities, wherein said critical control functionalities are selected from a list consisting of: pitching of wind turbine blades, control of power output and/or rotation speed of the wind turbine rotor and/or generator of the wind turbine, yaw control to rotate the nacelle, thrust force control such as thrust force control of wind turbine tower and/or wind turbine blades, and generator torque control.
- Claim: 19. (canceled)
- Claim: 20. A method according to claim 1, wherein at least one of said critical control functionalities handled by said second controller comprises critical monitoring functionalities wherein at least one of said monitoring functionalities is selected from a list consisting of: thrust force monitoring, shaft acceleration monitoring, monitoring of tower oscillations, monitoring of blade oscillations, monitoring of main shaft oscillations, rotor/generator speed monitoring, rotor/generator acceleration monitoring, nacelle acceleration monitoring, pitch position tracking monitoring, yaw misalignment to monitor that the pitch position follows a pitch reference, pitch incoherence monitoring to monitor that the difference of the pitch position between the blades does not exceed predefined limits, wind speed monitoring, blade root torque monitoring, tower torque monitoring, and monitoring of wind speed and/or wind direction.
- Claim: 21. (canceled)
- Claim: 22. A method according to claim 14, wherein said critical monitoring functionalities are utilized for providing said one or more outputs.
- Claim: 23. A system for controlling a wind turbine, said system comprising a first controller and a second controller, said controlling of said wind turbine comprising handling a first set of control functionalities and a second set of control functionalities, wherein said first set of control functionalities are non-critical control functionalities, wherein said second set of control functionalities comprises one or more critical control functionalities which are critical for the operation of said wind turbine, wherein said first controller is configured for handing said first set of control functionalities, wherein said second controller is a safety controller configured for controlling said wind turbine during emergency shutdown of said wind turbine by means of said critical control functionalities, and wherein said second controller furthermore is configured for controlling one or more of said critical control functionalities to provide an output to control said wind turbine when the wind turbine is in a power production mode.
- Claim: 24. A system according to claim 16, wherein said system is configured for controlling said wind turbine according to the method of claim 1.
- Claim: 25. A controller, for controlling a wind turbine, said controlling comprising handing one or more critical control functionalities which are critical for the operation of said wind turbine, wherein said controller is a safety controller configured for controlling said wind turbine during emergency shutdown of said wind turbine by means of said critical control functionalities, and wherein said second controller furthermore is configured for controlling one or more of said critical control functionalities to provide an output to control said wind turbine when the wind turbine is in a power production mode.
- Claim: 26. A controller according to claim 18, wherein said controller is configured for controlling said wind turbine according to the method of claim 1.
- Claim: 27. A wind turbine comprising a wind turbine control system according to claim 16.
- Current International Class: 03; 03; 05; 03
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