Tower state monitoring method and system for wind turbine generator

A technology for wind turbines and states, applied in wind turbine monitoring, wind turbine control, wind turbines and other directions, can solve the problems of low tower frequency, inaccurate displacement data, large errors, etc., and achieve the effect of improving monitoring accuracy

Active Publication Date: 2016-05-25
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, as the unit tower becomes higher and higher, the flexibility of the tower becomes larger and the frequency of the tower becomes lower and lower, and the integration method of measuring the acceleration of the nacelle will amplify the low-frequency signal, because the first-order frequency of the tower is too high The displacement data obtained in this way will be more inaccurate and the error will be larger

Method used

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  • Tower state monitoring method and system for wind turbine generator
  • Tower state monitoring method and system for wind turbine generator
  • Tower state monitoring method and system for wind turbine generator

Examples

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Embodiment 1

[0023] figure 1 It is a flow chart showing a tower state monitoring method of a wind power generator according to Embodiment 1 of the present invention. Wherein, a plurality of strain gauges are pasted on the top flange of the wind turbine tower. can be achieved by including such Image 6 The illustrated system performs the method.

[0024] refer to figure 1 , in step S110, the strain value of the tower of the wind power generator is acquired through a plurality of strain gauges.

[0025] Wherein, the plurality of strain gauges may be 2, 3 or 4, and the plurality of strain gauges may be the same strain gauges, or may be different strain gauges, or may be partly the same strain gauges. A plurality of strain gauges can be respectively pasted on the flange of the tower top of the wind power generator, that is, below the yaw brake of the wind power generator. The positions of the plurality of strain gauges at the top flange of the tower can be set according to actual conditio...

Embodiment 2

[0035] figure 2 is a schematic structural diagram showing a wind power generator according to Embodiment 2 of the present invention. like figure 2 As shown, a plurality of strain gauges are attached to the top flange of the tower of the wind power generator. In order to describe the embodiment of the present invention in detail, it can be set that the plurality of strain gauges can be 4 strain gauges, and the corresponding processing can include the following Content: the plurality of strain gauges may include a first strain gauge, a second strain gauge, a third strain gauge and a fourth strain gauge, wherein the first strain gauge, the second strain gauge, the third strain gauge and the fourth strain gauge Connect with full bridge connection.

[0036] Wherein, the first strain gauge, the second strain gauge, the third strain gauge and the fourth strain gauge can be the same strain gauge, can also be different strain gauges from each other, and can also be partially identi...

Embodiment 3

[0085] Based on the same technical idea, Image 6 It is a logical block diagram showing a tower condition monitoring system of a wind power generator according to Embodiment 3 of the present invention. refer to Image 6 , a plurality of strain gauges are attached to the top flange of the wind turbine tower, and the system includes a strain value acquisition module 610 , a variation acquisition module 620 and a control module 630 .

[0086] The strain value obtaining module 610 is used for obtaining the strain value of the tower of the wind power generator through the plurality of strain gauges.

[0087] The variation acquisition module 620 is used to obtain the value of the variation of the top of the tower according to the mapping relationship between the strain value and the variation of the top of the tower.

[0088] The control module 630 is used for generating a shutdown instruction to control the shutdown of the wind power generator when the value of the variation of t...

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Abstract

The embodiment of the invention provides a tower state monitoring method and system for a wind turbine generator. A plurality of strain discs are stuck on a flange at the top of a tower of the wind turbine generator. The method comprises the following steps: acquiring the strain value of the tower of the wind turbine generator via the strain discs; acquiring the top variation value of the tower according to a mapping relation between the strain value and the top variation value; generating a halt instruction when the top variation value exceeds a variation threshold value, so as to control the wind turbine generator to stop. According to the embodiment of the invention, the monitoring precision of the tower state of the wind turbine generator can be improved.

Description

technical field [0001] The invention relates to wind power generation technology, in particular to a tower state monitoring method and system for a wind power generator. Background technique [0002] As a new type of power generation technology, wind power has attracted much attention. The tower is an important part of the wind power generation unit, and the dynamic characteristics of the tower can directly reflect the health and operation of the unit. [0003] Usually, by installing a vibration acceleration sensor and its auxiliary devices, the vibration displacement data of the tower is obtained by integrating the acceleration data, and the displacement of the unit tower is reflected based on the vibration displacement data of the tower. [0004] However, as the unit tower becomes higher and higher, the flexibility of the tower becomes larger and the frequency of the tower becomes lower and lower, the integration method of measuring the acceleration of the nacelle will am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D17/00F03D7/00F03D13/20
CPCF03D7/00Y02E10/72
Inventor 靖峰唐新安
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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