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An online identification method for multiple loads on blades of large wind turbines

A technology of wind turbines and identification methods, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as difficult problems, and achieve the effect of accurate online identification

Active Publication Date: 2017-09-29
HUNAN UNIV OF SCI & TECH
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, since the blade root load is the result of multiple loads, how to extract gravity, centrifugal force, inertial force, aerodynamic force and other information from the measured data has always been an engineering technical problem

Method used

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  • An online identification method for multiple loads on blades of large wind turbines
  • An online identification method for multiple loads on blades of large wind turbines
  • An online identification method for multiple loads on blades of large wind turbines

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the drawings.

[0033] Such as figure 1 Shown is a schematic diagram of the overall structure of the blades of the large-scale wind turbine of the present invention.

[0034] 1. Define the coordinate system and the transformation relationship between the coordinate system

[0035] Such as figure 2 As shown, the wind turbine blade coordinate system is established, the fixed coordinate system xyz of the nacelle is defined and fixed on the nacelle (not rotating), and the rotating coordinate system of the hub is x 0 y 0 z 0 Fixed on the shaft to rotate synchronously, where y 0 It coincides with the y-axis of the fixed coordinate system of the nacelle, the direction is the same, the xoz plane is around y 0 The axis rotates at an angular velocity ω, x 0 With x axis and z 0 The angle with the z axis is ωt, from the coordinate system xyz to the coordinate system x 0 y 0 z 0 The transformation matrix is...

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Abstract

The invention discloses a method for online identification of multiple loads on blades of a large-scale wind turbine, comprising the following steps: (1) setting the coordinate system of the large-scale wind turbine and the transformation relationship between the coordinate systems; (2) determining the circumferential direction of the blade root and the axis of the blade (3) Using the data processing algorithm to decompose the multiple loads of the blade; (4) Using the contour deformation correction algorithm to correct the load. The invention has the ability to effectively extract and online identify multiple loads such as gravity load, centrifugal force load, inertial load and complex aerodynamic load, extract gravity, centrifugal force, inertial force, aerodynamic force and other information from measured data, and use computer to The above-mentioned calculation algorithm performs real-time calculation, and performs rapid and accurate online identification of multiple loads on large blades, which ensures the safe and reliable operation of large wind turbines during the service period.

Description

Technical field [0001] The invention relates to the technical field of wind power, in particular to an online identification method for multiple loads of blades of a large wind turbine. Background technique [0002] In recent years, the world’s wind power industry has developed rapidly. At the end of 2010, the world’s annual power generation from wind turbines has exceeded the UK’s electricity demand, accounting for approximately 2.5% of the world’s total electricity demand. This figure increased to 3% at the end of 2011. In 2013 it was 3.5%. In some countries and regions, wind power has become one of the largest sources of electricity, such as Denmark, Portugal, Spain and Germany. As of 2013 statistics, China has rapidly developed into the country with the largest installed wind power capacity in the world, exceeding 27% of the world. [0003] At present, large-scale horizontal-axis wind turbines are the mainstream models of wind farms, which are generally composed of blades, hu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 戴巨川张帆刘德顺沈意平龙辛杨书仪
Owner HUNAN UNIV OF SCI & TECH
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