Variable-speed variable-pitch wind turbine generator unit gust control method

A control method and technology for wind turbines, applied in the control, acceleration control, engine control and other directions of wind turbines, can solve the problems of poor stability and low safety, achieve good stability, high safety, and restrain the speed of the wind rotor from exceeding the speed limit. tuning effect

Inactive Publication Date: 2017-09-05
ZHEJIANG WINDEY
View PDF3 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of poor stability and low safety of existing variable-speed and variable-pitch wind turbine gust con

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
  • Variable-speed variable-pitch wind turbine generator unit gust control method
  • Variable-speed variable-pitch wind turbine generator unit gust control method
  • Variable-speed variable-pitch wind turbine generator unit gust control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] refer to Figure 1 to Figure 6 , a gust control method for a variable-speed variable-pitch wind turbine, the control method comprising the following steps:

[0025] A) Detect whether the speed ω of the wind turbine is greater than the rated speed ω of the wind turbine rate ;

[0026] B) Calculate whether the acceleration Δω / Δt of the wind turbine is greater than the acceleration setting threshold;

[0027] C) If the wind turbine meets the two conditions of A and B at the same time, the pitch angle is directly set to 90 degrees, open-loop control is performed, and the pitch rate is increased to the set threshold at the same time;

[0028] D) During pitch open-loop control, the torque control output remains at the original torque value;

[0029] E) After the feathering set time T, if the wind turbine does not meet the conditions of A and B, the pitch control w...

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 provides a variable-speed variable-pitch wind turbine generator unit gust control method. The method comprises the following steps of (A) detecting whether the rotation speed omega of a wind turbine generator unit is greater than a rated rotation speed omega <rate> of the wind turbine generator unit or not; (B) calculating whether the acceleration speed delta omega/delta t of the wind turbine generator unit is greater than an acceleration speed set threshold value or not; (C) directly setting the variable-pitch angle to be 90 degrees if the wind turbine generator unit meets both the conditions A and B, conducting open-loop control and increasing the variable-pitch rate to the set threshold value; (D) controlling the torque output to be an original torque value during variable-pitch open-loop control; and (E) after the feathering set time T, switching variable-pitch control to conventional closed-loop control if the wind turbine generator unit does not meet the conditions A and B, and continuing feathering of a variable-pitch system if the wind turbine generator unit meets both the conditions A and B. The variable-speed variable-pitch wind turbine generator unit gust control method provided by the invention is good in stability and high safety performance.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a gust control method for variable-speed and variable-pitch wind turbines. Background technique [0002] With the development of low wind speed and ultra-low wind speed wind turbines, the diameter of wind turbines has been increasing. Due to the huge inertia of the wind rotor, the speed of the wind rotor usually changes 1 to 2 seconds after the gust occurs, and the lagging system is likely to cause speeding. Another factor that causes the turbine to overspeed is that due to the nonlinear characteristics of blade aerodynamics, a single controller or a single-gain controller can no longer meet the control performance requirements. The usual practice is to design the gain adjustment according to the pitch angle or wind speed The larger the pitch angle or the wind speed, the smaller the gain. This avoids the long adjustment time of the pitch angle, but in the case of g...

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
IPC IPC(8): F03D7/04
CPCF03D7/0224F03D7/0276F03D7/028F03D7/042F05B2270/102F05B2270/1032F05B2270/322Y02E10/72
Inventor 娄尧林叶杭冶潘东浩章锦雷王贵子
Owner ZHEJIANG WINDEY
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