Wind turbine independent pitch control method and pitch comprehensive monitoring method and system

A wind turbine, independent pitch technology

Active Publication Date: 2022-01-25
GUODIAN UNITED POWER TECH
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing pitch system has a single function and cannot perform comprehensive comprehensive monitoring
[0003] In addition, the traditional independent pitch control system (IPC) needs to know the force of the blade under different conditions. The method adopted is: install the blade stress measurement equipment at the blade root to monitor the blade load in real time. This method exists in the equipment High cost, short life of stress sensor, difficult maintenance, etc.
[0004] It can be seen that the above-mentioned existing independent pitch system obviously still has inconvenience and defects in structure, method and use, and needs to be further improved urgently.

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
  • Wind turbine independent pitch control method and pitch comprehensive monitoring method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] In low wind speed wind turbine pitch motors, the change of the rotor load connected to the AC motor can be reflected in the air gap torque of the AC motor, and the fluctuation of the air gap torque can cause the change of the stator current through the stator flux to cause the gap between the stator and the rotor. The change of electromagnetic coupling, so that the operating state information is reflected in the stator current signal. Therefore, this application chooses the current as the information source for load identification, and realizes the quantitative identification of the blade motor load based on the online monitoring technology of motor current load, which provides a reliable guarantee for accurate independent pitch change. The specific embodiments of the low wind speed wind turbine pitch comprehensive monitoring system and method of the present application are as follows.

[0035] Refer to attached figure 1 As shown, the wind turbine pitch comprehensive m...

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 method for controlling the independent pitch of a wind turbine. The method comprises: monitoring the current information of the pitch motor of the wind turbine in real time; The load data of a single blade is calculated; the main controller of the wind turbine sends an instruction to the pitch driver according to the load data of a single blade, so that it can control a single blade to complete an independent pitch action. Also disclosed are a comprehensive monitoring method and system for independent pitch adjustment of wind turbines. The present invention utilizes the real-time collection of the electric drive current of the pitch motor, and combines the relative position information of the impeller and the blade to calculate the load, and has the function of monitoring and identifying the motor load on a single blade, which facilitates the accurate realization of the independent pitch control of the blade. Reduce unit load and improve unit efficiency. The invention also has the functions of blade damage diagnosis, blade icing monitoring, fan overspeed protection, fan vibration monitoring and environment monitoring.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a method for controlling independent pitch of wind turbines and a method and system for comprehensive monitoring of pitch. Background technique [0002] The pitch system is an important part of the wind turbine. It is the "adjustment switch" for the energy input of the wind turbine, and its performance directly affects the safety performance of the wind turbine. With the enlargement of wind turbines, the increasing blades and loads put forward higher requirements for the safety performance of the pitch system. Comprehensive and comprehensive monitoring of the pitch system and related components of low wind speed wind turbines is a key measure to ensure the safety of wind turbines and increase power generation. The existing pitch system has a single function and cannot perform comprehensive comprehensive monitoring. [0003] In addition, the traditional independent pitch cont...

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): F03D7/00F03D80/40
CPCF03D7/00F03D80/40Y02E10/72
Inventor 张兴袁凌汪正军董健王峰刘金鹿
Owner GUODIAN UNITED POWER TECH
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