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Method for detecting accretion of ice on wind turbine

A facility and wind energy technology, applied in the field of wind energy facilities, can solve problems such as misestimation, response threshold is not completely expected, changes, etc.

Pending Publication Date: 2021-10-29
WOBBEN PROPERTIES GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, an increase in the response threshold since icing is identified is not entirely desirable in any case, as some icing would not be identified
[0008] Also note that the criteria for icing may vary, e.g. in relation to a specific wind energy installation or a specific location
This can additionally lead to the fact that the mentioned method can lead to miscalculations

Method used

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  • Method for detecting accretion of ice on wind turbine
  • Method for detecting accretion of ice on wind turbine
  • Method for detecting accretion of ice on wind turbine

Examples

Experimental program
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Embodiment Construction

[0094] figure 1 A wind energy installation 100 is shown with a tower 102 and a nacelle 104 . A rotor 106 with three rotor blades 108 and a spinner 110 is arranged on the nacelle 104 . The rotor 106 is set in rotational motion by the wind during operation, which in turn drives the generator in the nacelle 104 .

[0095] figure 2 The profile of the detected wind speed and the deviation Δ of the wind speed associated with the detected operating variable is shown in a graph, and the deviation, which is therefore referred to as wind speed deviation, is shown as a function of the wind speed V. The wind speed V is plotted here on the abscissa in the unit m / s. The deviation Δ is normalized to the degree of deviation. at rated wind speed V N The deviation below can be used as the degree of deviation for normalization. As well as the recognition that this wind speed deviation between normal operation and operation with icing is wind speed dependent, further research was carried o...

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Abstract

The invention relates to a method for detecting the accretion of ice on a rotor blade of a rotor of a wind turbine (100), wherein the rotor is able to be operated at a variable speed. The method comprises the steps of recording a wind speed (V) of a wind acting on the rotor, recording an operating variable dependent on the wind speed (V), comparing the recorded operating variable or the recorded wind speed with a reference variable of a characteristic wind-speed-dependent operating variable curve of the wind turbine (100), wherein the characteristic operating variable curve specifies an operating variable assumed to be optimum as a function of the wind speed (V); detecting the accretion of ice on the rotor blade when the recorded operating variable or the recorded wind speed (V) deviates from the reference variable by at least a predetermined minimum deviation, wherein the minimum deviation is prescribed as a function of the wind speed.

Description

technical field [0001] The invention relates to a method for detecting ice accretion on rotor blades of a rotor of a wind energy installation. The invention also relates to a wind energy installation using a corresponding method. Background technique [0002] Wind energy installations are known which generate electrical power from the wind. For this purpose, the wind energy installation uses a rotor with at least one rotor blade, usually a plurality of rotor blades, which have an aerodynamic airfoil and are driven by the wind. Depending on the location of installation, climatic conditions can lead to possible ice accumulation on the rotor blades. Such icing can alter, often worsen, the aerodynamic properties of the rotor blades. Depending on where it is set up, this accretion of ice can also pose a risk of ice shedding. [0003] Wind energy installations are therefore also operated in areas and locations where ambient conditions cause icing on the rotor blades. Usually,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D80/40
CPCF03D80/40F05B2270/32F05B2270/327F05B2270/328F05B2270/309Y02E10/72
Inventor 拉尔夫·梅辛丹尼尔·森夫特莱本
Owner WOBBEN PROPERTIES GMBH
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