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

Grid type double-feedback aerogenerator rotor position detecting method

A technology for rotor position detection and wind power generators, which is applied in wind power generation, control generators, electrical components, etc., and can solve problems such as inconvenient maintenance of installed position sensors, complicated working environment, and reduced system reliability.

Inactive Publication Date: 2008-09-24
NARI TECH CO LTD
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: using sensor hardware to measure rotor position and speed signals. On the one hand, due to the complex actual working environment of wind turbines, installing position sensors is not only inconvenient for maintenance, but also reduces the reliability of the entire system; on the other hand, Due to the continuous increase in the capacity of wind turbines at present, in actual operation, it is necessary to consider how to maintain the normal operation of the unit or how to realize the safe shutdown of the unit when the position sensor fails.

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
  • Grid type double-feedback aerogenerator rotor position detecting method
  • Grid type double-feedback aerogenerator rotor position detecting method
  • Grid type double-feedback aerogenerator rotor position detecting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and examples. However, the invention is not limited to the examples given.

[0029] example:

[0030] Here, taking the grid voltage-oriented doubly-fed generator vector control mode as an example, there are: u sd =-ω 1 L m i rq , u sq = 0, ω 1 is the angular velocity of the stator, under the control of the rotor-side converter controller, according to figure 1 The flow shown, the specific implementation steps are as follows:

[0031] Sampling the rotor current, stator voltage, current and grid voltage of the generator; from the collected grid voltage, the grid voltage vector angle θ is obtained through the phase-locked loop s ;Judging the operating status of the unit:

[0032] 1. If the unit is in the no-load excitation control stage before grid connection, the rotor side of the double-fed generator is connected to the converter, and the stator side is ke...

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 relations to a method for detecting the rotor position of an interconnected double-feed type aerogenerator which comprises the following steps: sampling, transformation of coordinate of the sampling unit before interconnecting, PI adjusting of the rotor position, obtaining a rotor transform angle, transformation of the coordinate of the sampling unit after interconnecting, calculating the angular deviation control quantity of the rotor position, PI adjusting of the rotor position and obtaining a rotor transform angle. The method uses the software to replace the sensor for hardware detection, and can adjust the angular deviations of the rotor position before and after interconnecting to zero to obtain an accurate value of the rotor position angle. The method has the advantage of high practicability, which safely and effectively realizes the rotor position detection of the generator and the vector control of a machine group without needing to add hardware, thus reducing the economic cost.

Description

technical field [0001] The invention relates to a method for detecting the rotor position of a grid-connected double-fed wind power generator, and belongs to the technical field of variable-speed constant-frequency double-fed wind power generators. Background technique [0002] The doubly-fed wind turbine is a kind of alternator, which has the advantages of flexible control, adjustable power factor, high efficiency, and small capacity of the frequency conversion device. It is the key component of the most widely used variable-speed constant-frequency wind turbine. [0003] At present, the control of double-fed wind turbines generally adopts the method of vector control. The detection of the position of the generator rotor is generally obtained through the sensor installed on the generator rotor, and the rotor transformation angle is obtained through calculation, which is used for the vector control of the unit. . The sensors used can be either position sensors or speed sens...

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): H02P9/00H02J3/38
CPCY02E10/763Y02E10/76
Inventor 王伟朱晓东徐殿国张学广
Owner NARI TECH CO LTD
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