Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A spatial cable system and optimization method for controlling wind turbine blade flapping

A technology for wind turbine blades and wind turbines, which is applied to wind turbines, wind turbines, motors and other directions that are consistent with the wind direction, and can solve problems such as self-weight, impact, and difficulty in running and generating electricity.

Active Publication Date: 2018-08-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the magnitude of the tension is not easy to control, and if there is a slight carelessness, the blade will break as a whole; the construction of internal reinforcement of the blade is more difficult, which increases the cost of construction measures; It is difficult to cope with the impact of wind load uncertainty on the blade

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 spatial cable system and optimization method for controlling wind turbine blade flapping
  • A spatial cable system and optimization method for controlling wind turbine blade flapping
  • A spatial cable system and optimization method for controlling wind turbine blade flapping

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment takes a large horizontal axis wind turbine in China as an example, such as figure 1 As shown, the specific implementation steps are:

[0045] i) First anchor the three cables directly to the tips of the three blades, such as figure 1 (a) A static stator system without redundant degrees of freedom is formed, and the dynamic characteristic analysis is performed to obtain the fundamental frequency of the wind turbine system;

[0046] j) Establish a finite element model for the system and apply a preset wind pressure, on this basis, analyze the linear elastic buckling eigenvalues ​​based on the theoretical equation, and obtain the calculated buckling coefficient and buckling displacement;

[0047] k) Assuming that the total length of the blade is H, the distance from the hub is H / 2( figure 1 (b)), H / 4 and 3H / 4 are equipped with static stator systems, and the dynamic characteristics and buckling analysis are carried out. Finally, the fundamental frequency, ...

Embodiment 2

[0055] This embodiment takes a large vertical axis wind turbine in China as an example, such as figure 2 As shown, the specific implementation steps are:

[0056] i) First anchor the six cables directly to the tops of the six blades, such as figure 2 (a) A space cable system is formed, and the dynamic characteristic analysis is carried out on this basis to obtain the fundamental frequency of the wind turbine system;

[0057] j) Establish a finite element model for the system and apply a preset wind pressure, on this basis, analyze the linear elastic buckling eigenvalues ​​based on the theoretical equation, and obtain the calculated buckling coefficient and buckling displacement;

[0058] k) Assuming that the total length of the blade is H, it is at H and H / 2 from the top of the blade in turn ( figure 2 (b) and figure 2 (c)) The static stator system is set up, and the dynamic characteristics and buckling analysis are carried out. Finally, the fundamental frequency, buckl...

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 discloses a space cable system and optimization method for controlling the flapping of wind turbine blades. The blades of the wind turbine are connected by hubs installed on the nacelle, and full-length space cables are used at the same locations along the wingspan direction between the blades. For fixation, the same parts are respectively at 1 / 4, 1 / 2, 3 / 4 and the tip of the blade. A set of three space cables at the same parts of the blade constitute a static stator system without redundant degrees of freedom. The space The cable system is a multiple static stator subsystem composed of several groups of three cables. The number of static stator subsystems is determined by linear elastic eigenvalue buckling analysis of the established finite element model. Compare the buckling of the wind turbine system with different numbers of static stator subsystems installed. coefficient to ultimately determine the optimal number of spatial cable static stator subsystems. The invention can significantly improve the buckling stability performance of the wind turbine tower-blade coupling system while controlling the flapping of the wind turbine blades, and has the advantages of simple structure and convenient construction.

Description

technical field [0001] The invention discloses a space cable system and an optimization method for controlling blade waving, and relates to the technical field of building of wind power systems and the technical field of wind resistance of large towering structures. Background technique [0002] As one of the main structures for wind power generation, wind turbines are gradually developing towards high power, and the ensuing wind-induced damage and stability problems are becoming more and more prominent. Among them, the bending and torsion of blades and the collapse of tower instability are the most common damages. form. [0003] The wind turbine system under the action of strong wind is in the stop state, and its bending stiffness is reduced compared with the rotating state. In addition, the drastic change of strong wind direction will cause the wind angle of attack of the airfoil to change greatly, and then the blades of the wind turbine will appear aerodynamic instabilit...

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): F03D1/06F03D80/00
CPCF03D1/06F03D80/00Y02E10/72
Inventor 柯世堂徐璐王浩朱鹏杜凌云余玮余文林王晓海
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com