Method for onsite load test and evaluation of wind turbine blades

A wind turbine blade and load testing technology, which is applied in the testing of mechanical components, testing of machine/structural components, measuring devices, etc., can solve difficult problems such as load evaluation of wind turbine blades

Inactive Publication Date: 2017-05-31
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that the existing wind turbine blades adopt methods such as aerodynamic calculation and wind tunnel test, it is difficult to accurately evaluate the load of wind turbine blades. The evaluation method can evaluate the load conditions of new wind turbine blades, and can also judge the load change trend of wind turbine blades in long-term operation

Method used

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be noted that the following descriptions are only preferred embodiments of the present invention, and therefore do not limit the protection scope of the present invention.

[0031] In this embodiment, taking the current mainstream MW-level wind turbine blade as an example, the following steps are used to test and evaluate the on-site load of the blade:

[0032] 1) Determine the section position of the blade to be estimated for load evaluation. The location of the load evaluation section is selected. According to the results of the blade load design report, the load-focused sections are determined at 0.5m, 10m, 20m, 30m, and 40m away from the blade root. Four reference points are selected as load evaluation points on the edge, trailing edge, pressure surface and suctio...

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Abstract

The invention discloses a method for onsite load test and evaluation of wind turbine blades and aims to provide an onsite load evaluation technique for accurately testing and evaluating load borne by the blades in practical operation so as to provide guidance for design and operation of the blades and even a unit. The method has the advantage that corresponding load onsite evaluation methods can be established aiming at wind resource conditions of specific wind fields and special blade structural forms to provide support for design, research and development of novel wind turbine blades and operation evaluation of existing wind turbine blades.

Description

technical field [0001] The invention relates to the technical field of wind power generation in the machinery industry, in particular to a field load test and evaluation method for wind turbine blades. Background technique [0002] The load assessment of wind turbine blades is an important concern in the design and operation of wind turbine blades. In the design of wind turbine blades, it is necessary to analyze and evaluate the load conditions of the blades and serve as the basis for subsequent design. In the actual design, the load analysis and evaluation are mostly based on the statistical data of the wind field and the requirements of relevant specifications, combined with the aerodynamic calculation of the blades. However, since the aerodynamic characteristics of actual blades are mostly in unsteady flow field conditions, the blade load includes the superposition effect of various factors such as aerodynamic load, inertial load, and control load, and the aeroelastic co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00
CPCG01M13/00
Inventor 石可重
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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