Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of blade root moment measurement method

A blade root and torque measurement technology, which is applied to wind turbines, wind turbine monitoring, engines, etc., can solve problems such as the fragility of the torque detection system, and achieve a simple and reliable detection process

Active Publication Date: 2020-04-17
XUJI GRP +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for measuring blade root torque, which is used to solve the problem that the torque detection system in the prior art is relatively fragile

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of blade root moment measurement method
  • A kind of blade root moment measurement method
  • A kind of blade root moment measurement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] 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 accompanying drawings and specific embodiments.

[0036] This embodiment provides a method for measuring blade root moment, and its corresponding measurement principle is as follows figure 1 As shown, by calculating the rotation torque of the wind rotor and the axial thrust torque of the wind on the wind rotor, the final orthogonal synthesis is obtained to obtain the blade root torque. The whole detection process is simple and reliable. Wherein, the rotational force of the wind rotor is parallel to the tangential direction of the wind rotor plane, and the axial thrust of the wind on the wind rotor is the thrust in the direction of the circular axis of the wind rotor plane. Specifically, the flow chart corresponding to the blade root moment measurement method is as follows figure 2 shown...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a blade root moment measuring method. The blade root moment measuring method comprises the following steps: collecting the rotating speed of a wind driven generator and the wind speed of a wind farm, and calculating the rotating speed of a wind wheel and the blade tip speed ratio; acquiring the electromagnetic torque of the wind driven generator, and calculating the resistance torque of the wind wheel; calculating the rotation moment of the wind wheel by using a state observer according to the rotation speed of the wind wheel and the resistance moment of the wind wheel; calculating a wind wheel rotation moment coefficient according to the rotation moment of the wind wheel, obtaining a wind wheel axial thrust coefficient according to the pre-stored relation of the wind wheel rotation moment coefficient, the blade tip speed ratio and the wind wheel axial thrust coefficient, and calculating the axial thrust moment of the wind to the wind wheel according to the wind wheel axial thrust coefficient; and synthesizing the root moment of the blade by using the rotation moment of the wind wheel and the axial thrust moment of the wind to the wind wheel. By calculatingthe rotation moment of the wind wheel and the axial thrust moment of the wind to the wind wheel, the root moment of the blade is finally obtained, the whole measurement process is simple and reliable, and the problem that a moment detection system in the prior art is relatively weak is effectively solved.

Description

technical field [0001] The invention relates to a method for measuring blade root moment, and belongs to the technical field of wind power generation state monitoring. Background technique [0002] Blades are the core components of wind turbines. The health of the blades directly affects the efficiency of the unit. The cost of the blades accounts for about 15%-20% of the total cost of the wind turbine. If it is possible to continuously monitor the operating conditions of the blades, detect minor damage and icing on the surface as soon as possible, realize planned maintenance in advance, and prevent minor problems, it will not only prolong the life of the blades, reduce maintenance costs, but also increase the availability of the unit And power generation efficiency, has great economic benefits. Therefore, real-time monitoring of the operating status of fan blades is of great significance to the healthy operation of wind turbines. [0003] The force characteristics of the b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F03D17/00F03D80/00G06Q50/06
CPCF03D17/00F03D80/00G06Q50/06Y02E10/72
Inventor 高亚春徐奉友费怀胜岳红轩李延青
Owner XUJI GRP