Tower-top-load-based independent variable-pitch control method for wind generating set

A technology for wind turbines and independent pitch adjustment, which is applied in the control of wind turbines, the monitoring of wind turbines, and wind turbines, etc., to achieve the effects of reduced number, easy process, and reduced cost

Inactive Publication Date: 2018-05-15
GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new technology reduces the amount of sensor needed for monitoring wind turbines without compromising their performance or efficiency. It also makes it easier than previous methods because there were fewer sensors installed throughout every part of the blades rather than just one placed near them.

Problems solved by technology

Technician Problem: The technical problem addressed in this patented text relates to reducing stress concentration during heavy lifesaving operations such as wind farms due to increased weight loading caused by individual parts or other factors like uneven distribution of weights along the entire machine's axis. Current methods involve individually adjusting the pitch angles applied to specific areas within the part being controlled based solely upon the overall balance between these forces. These techniques are expensive because they require multiple inputs and have limited effectiveness when dealing with complex systems involving many different types of materials.

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
  • Tower-top-load-based independent variable-pitch control method for wind generating set
  • Tower-top-load-based independent variable-pitch control method for wind generating set
  • Tower-top-load-based independent variable-pitch control method for wind generating set

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The present invention will be further described below in conjunction with specific examples.

[0030] see Figure 4 As shown, the independent pitch control method for wind turbines based on tower top loads provided in this embodiment includes the following steps:

[0031] 1) First, mount the sensor on the top of the tower, and directly collect the bending moment M at the top of the tower through the sensor x , M y , M z , and then calculate the D-axis load and Q-axis load through the collected tower top load, that is, the D-Q axis load. The details are as follows:

[0032] The D-axis load reflects the unbalance of the wind rotor plane pitch direction, and the Q-axis load reflects the unbalance of the impeller plane yaw direction load. In the wind turbine hub coordinate system, the D-axis load refers to the hub M y , while the Q-axis load refers to the hub M z . Hub coordinate system (GL coordinate system) The X coordinate axis points from the nose to the tail along

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 tower-top-load-based independent variable-pitch control method for a wind generating set. The method comprises steps as follows: firstly, sensors are attached to the top endof a tower, the tower top bending moment Mx, the tower top bending moment My and the tower top bending moment Mz are directly collected through the sensors, and then the D-axis load and the Q-axis load are calculated according to the collected tower top loads, that is, the D-Q axis load is calculated; secondarily, the D-axis load and the Q-axis load are output to be D-Q axis variable-pitch instructions through filters, PI controllers and amplitude limitation; finally, the D-Q axis variable-pitch instructions are subjected to D-Q axis reverse transformation, the variable-pitch instruction of each paddle is obtained, and the variable-pitch instructions are stacked on a unified variable-pitch instruction. According to the method, the tower top loads are used as feedback quantities for independent variable-pitch control, and three groups of load sensors are reduced into one group, so that the reliability is improved while the cost is remarkably reduced.

Description

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

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
Owner GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap