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Ice detection based on anemometry

An anemometer and detection unit technology, applied in the icing field of wind turbines, can solve problems such as deteriorating energy output

Active Publication Date: 2008-06-18
GENERAL ELECTRIC RENOVABLES ESPANA SL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, in the event of ice shedding, adjustments may occur to shut down the wind turbines, further deteriorating the energy output

Method used

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  • Ice detection based on anemometry
  • Ice detection based on anemometry
  • Ice detection based on anemometry

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Embodiment Construction

[0015] Reference will now be made in detail to various embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, and is not meant to be limiting of the invention. For example, features illustrated or described as part of one embodiment can be used on or in conjunction with other embodiments to yield yet a further embodiment. The present invention is intended to cover such modifications and variations.

[0016] Under certain atmospheric conditions, ice will develop on turbine components such as anemometers and blades. Commonly used ice sensors do not provide sufficient accuracy. The inability to detect ice with the desired accuracy results in ice shedding from the turbine blades and as a result the wind turbine needs to be shut down below a certain temperature.

[0017] FIG. 1 illustrates an embodiment in which a system for ice detection is provided on a wind turbine 100 . A ...

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Abstract

The present invention provides a method for ice detection for a wind turbine. The method includes providing an ice condition threshold parameter adapted for distinguishing a condition during which icing may occur and a condition during which icing may not occur, measuring a wind velocity with a first anemometer (110), wherein the first anemometer being of a first type, measuring a wind velocity with a second anemometer (120), wherein the second anemometer being of a second type, and wherein the second type is different from the first type, evaluating, for a condition during which icing may occur, a deviation of the wind velocity measured with the first anemometer and the wind velocity measured with the second anemometer, and determine whether the deviation exceeds a limit value based on acalibration conducted under a condition during which icing may not occur.

Description

technical field [0001] The present invention relates to icing of wind turbines. More particularly, the present invention relates to ice detection and ice detection units for wind turbines. In particular, the invention relates to a method for wind turbine ice detection, a method for calibrating an ice detection unit and an ice detection unit for a wind turbine. Background technique [0002] In the past, wind turbines have experienced increasing demand. Consequently, more and more wind turbines are also being planned and erected in locations with a higher probability of icing during the year. For example, such sites may be located in cold and harsh climates such as northern Europe, offshore locations or alpine regions. These conditions lead to an increased likelihood of icing, ie, ice accumulation. In particular, icing at turbine rotor blades results in reduced energy output. This is based on an increased mass load on the wind turbine and a deterioration of the aerodynami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V9/00G01V13/00F03D1/00
CPCY02E10/723F03D11/0025Y02E10/722F03D7/042F05B2270/80F05B2260/845F05B2270/404F05B2260/80F05B2270/802F03D80/40Y02E10/72
Inventor F·奥尔梅尔T·霍内坎普C·霍夫罗格
Owner GENERAL ELECTRIC RENOVABLES ESPANA SL
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