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

Pitch control of a wind turbine

A technology of wind turbine and pitch control, which is applied in the direction of wind engine control, engine control, wind engine, etc., and can solve problems such as the life reduction of pitch actuators

Active Publication Date: 2012-01-11
VESTAS WIND SYST AS
View PDF3 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it would be desirable to have an improved control system that would alleviate the problem of reduced pitch actuator life due to actuation of the pitch actuators

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
  • Pitch control of a wind turbine
  • Pitch control of a wind turbine
  • Pitch control of a wind turbine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] figure 1 A known control system 100 for controlling the speed of a wind turbine rotor is shown. The wind turbine 180 includes a rotor having at least one rotor blade 192. The pitch of the rotor blades 192 is adjustable. That is, the blade, or the part of the blade extending in the longitudinal direction of the blade, such as the tip of the blade, can adjust the angle about the longitudinal axis of the blade. The pitch actuator 191 is used to perform angle adjustment or pitch adjustment of the blade or blade portion.

[0053] figure 2 A wind turbine 200 is shown that includes a rotor 210 for driving a shaft coupled to a generator, which is used to generate electricity from a wind driven rotor 210. The control system 100 may be covered outside the wind turbine, inside the nacelle 211, inside the tower 212, or elsewhere. The control system 100 supplies the pitch control signal PC 220, such as an electric signal, to the pitch actuator 191 or a hydraulic drive system includ...

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

A wind turbine control system suitable for minimising actuation of pitch actuators is disclosed. The control system uses an error gain schedule in full load control for reducing pitch actuation when the difference between the rotor speed and the reference rotor speed is not critical for the load of wind turbine components. The error gain schedule may be a nonlinear function which reduces the gain for low rotor speed errors. The use of the error gain schedule may reduce wear of the pitch actuators and may improve reduction of structural oscillations since focus removed from tracking the rotor speed reference when the speed error is low.

Description

Technical field [0001] The present invention relates to the control of wind turbines, and in particular to the control of the pitch of wind turbine blades. Background technique [0002] Pitch actuators are used to adjust the pitch or angle of the blades of the rotor in order to adjust the aerodynamic efficiency of the wind turbine rotor and, for example, the rotor speed. [0003] Therefore, by adjusting the pitch, it is possible to reduce the rotor speed and thereby avoid excessive loading of wind turbine components, for example at high wind speeds. However, actuating a pitch actuator (often a hydraulic actuator) naturally reduces the life of the pitch actuator, thereby increasing the risk of failure. In order to improve the overall power generation efficiency of the turbine, the operational reliability of the wind turbine is the most important. Therefore, it is desirable to improve the service time or reliability of the pitch actuator. [0004] US 4161658 discloses a wind turbine ...

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 Applications(China)
IPC IPC(8): F03D7/04
CPCF03D7/0224Y02E10/723F05B2270/404F05B2270/335F05B2270/304F05B2270/32F03D7/046F05B2270/328F05B2270/327F05B2270/109F03D7/0276Y02E10/72
Inventor P·布拉特K·Z·厄斯特高
Owner VESTAS WIND SYST AS
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