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Wind turbine control method

A control method and technology for wind turbines, applied in the control of wind turbines, wind turbines, motors, etc., can solve problems such as error operation conditions, insufficient control, poor control, etc., and achieve simple and cheap implementation, small storage requirements and calculation. amount of effect

Active Publication Date: 2010-11-24
VESTAS WIND SYST AS
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AI Technical Summary

Problems solved by technology

[0006] However, even for very advanced and complex control systems, there can still be undesirable errors, for example due to sensor errors that provide incorrect data to the control system, or due to operating situations that arise that are not foreseen or covered by the applied control strategy. and insufficient control
This poor control can lead to very high and unacceptable loads on some components of the wind turbine under some control and climatic conditions, for example in the tower in the case of unfavorable pitch changes of one or more blades. High and unacceptable loads, or very high and unacceptable loads in the gears in the case of wrong regulation of the power
Such loads can be considerable and in extreme worst cases can lead to significant damage to the wind turbine

Method used

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Embodiment Construction

[0045] figure 1 An overall view is given of how a control method for supervising key control parameters is implemented in one embodiment in a control system of a wind turbine. In the example shown, the controllable parameter of the wind turbine being supervised is the blade pitch, so the control signal includes an overall pitch reference value θ RefCol 100, the overall pitch reference value θ RefCol 100 is the common pitch parameter for all blades and is equal to the individual pitch reference parameter θ for each blade RefA , θ RefB and θ RefC Average of 101. Overall pitch reference value θ RefCol 100 is determined in the top controller 103. By using the overall pitch reference value 100 and the calculated value TYC 105 based on tilt-yaw, the pitch reference parameter θ of each blade RefA , θ RefB and θ RefC 101 is determined in the hub controller 104. In addition to the modules 100 , 105 for overall pitch calculations and pitch-yaw calculations, the top control...

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Abstract

A method of controlling a wind turbine, where a control signal for a controllable parameter of the wind turbine is determined repeatedly at successive time steps, and a control history including respective control values derived from or included in past control signals is stored. These control values stored in the control history are then used to determine an alert parameter for the controllable parameter, the alert parameter being a function of the variations of the control signals over time. The wind turbine is then controlled according to the most recent control signal only if the alert parameter is below an alert threshold, and otherwise according to a modified control strategy. The control method may be performed on pitch reference signals for controlling the individual and / or collective pitch of the blades. The invention further relates to a control system configured to perform the above control method, and a wind turbine comprising such system.

Description

technical field [0001] The present invention relates to a control strategy for a wind turbine aimed at detecting and avoiding situations of incompatible changes in control which would otherwise result in extreme load conditions for wind turbine components. Background technique [0002] Most modern wind turbines are usually continuously controlled and regulated to ensure that maximum power is extracted from the wind in the prevailing wind, climate, while ensuring that the loads acting on the different components of the wind turbine remain at acceptable levels at all times within limits. Desirably, the wind turbine can also be controlled to accommodate rapid local changes in wind speed - gusts, and the wind turbine takes into account the actual wind speed (wind distribution) acting on individual blades, for example as the blades pass the tower or vary with distance to the ground. The dynamic change of the load on it. [0003] For this, several parameters are collected and mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCY02E10/723F03D7/0264F03D7/043Y02E10/72
Inventor J·V·克努森
Owner VESTAS WIND SYST AS
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