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Improved electro-thermal heating system for wind turbine blades

A technology for heating systems and wind turbines, applied in the field of control, capable of solving problems such as damage to the ETH system and/or blades, affecting the power output of the ETH system, fluctuations, etc.

Active Publication Date: 2020-02-21
VESTAS WIND SYST AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, key control parameters of the ETH system, such as supply voltage, may fluctuate, which may affect the power output of the ETH system, and may cause damage to the ETH system and / or blades by, for example, increased heat generation by the ETH system exceeding design limits. damage

Method used

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  • Improved electro-thermal heating system for wind turbine blades
  • Improved electro-thermal heating system for wind turbine blades
  • Improved electro-thermal heating system for wind turbine blades

Examples

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Embodiment Construction

[0038] figure 1 A schematic diagram of a typical wind turbine 10 comprising an embodiment of a wind turbine blade 19 according to the invention is shown. Wind turbine 10 is mounted on a foundation 12, which may be an onshore foundation or an offshore platform or foundation. The wind turbine includes a tower 14 having a plurality of tower sections. A nacelle 16 is located on top of and attached to the tower 14 . The wind turbine rotor connected to the nacelle 16 includes a hub 18 and at least one wind turbine blade 19, wherein figure 1 Three wind turbine blades are shown in , however there may be any number of wind turbine blades 19 depending on the design and implementation of the wind turbine 10 . The wind turbine blades 19 are connected to a hub 18 which in turn is connected to the nacelle 16 by a low speed shaft extending out of the front of the nacelle 16 .

[0039] refer to figure 2 , the wind turbine blade 201 may have a plurality of ETH elements 202 attached there...

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PUM

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Abstract

The present invention relates to a method of controlling an electro-thermal heating system in a wind turbine blade, comprising measuring a supply voltage to the electro-thermal heating system, determining a duration of a variable time based enforced off period based on the measured supply voltage, and inserting the variable time based enforced off period between subsequent switching duty cycles that controls the electro-thermal heating system. The present invention also relates to a wind turbine that comprises one or more wind turbine blades wherein each wind turbine blade comprises an electro-thermal heating system and a processor adapted to perform the method.

Description

technical field [0001] The present invention relates to an improved electrothermal heating (ETH) system, and more particularly to a method of control to standardize power output in an electrothermal heating system. Background technique [0002] Wind turbines use wind energy to generate electricity and can be located on land or water. Wind turbines in cold climates may be subject to icing events in which ice may form on the surface of the wind turbine blades due to water freezing on the cold surface. The accumulation of ice on the blade surface can lead to undesired consequences. For example, changes in the profile of wind turbine blades due to ice buildup can reduce the rotational speed of the wind turbine or change the angle of attack of the blades, which can affect the thrust produced by the wind turbine's rotor and the power generated by the wind turbine. As a result, the wind turbine may operate at less than optimal speed and efficiency, which deteriorates the performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D80/40F03D7/00F03D7/04
CPCF03D7/042F03D7/00F03D80/40Y02E10/72F03D17/00F03D80/60F05B2270/303H05B1/0225H05B1/023H05B3/0009H05B2214/02
Inventor A·伍德S·巴格P·巴杰
Owner VESTAS WIND SYST AS