Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for acquiring stator and rotor current redundant signals of double-fed fan motor set

A technology for doubly-fed wind turbines and rotor currents, which is applied in the control of generators, motor-generators, and electronically commutated motors, and can solve problems such as increased costs.

Inactive Publication Date: 2012-03-07
CHONGQING UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the sensors in the doubly-fed wind turbine control system do not have redundant design, and those that implement redundant design also use hardware redundancy to ensure the correctness of sensor output signals, such as low and high-speed shaft rotor speed sensors , but each signal needs two sensors to measure, which will inevitably bring about an increase in cost

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
  • Method for acquiring stator and rotor current redundant signals of double-fed fan motor set
  • Method for acquiring stator and rotor current redundant signals of double-fed fan motor set
  • Method for acquiring stator and rotor current redundant signals of double-fed fan motor set

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] Starting from the electromagnetic transient mathematical model of the doubly-fed wind turbine, the stator and rotor current state equations are derived, and the corresponding observer model is established. It is now assumed that the d and q axes are synchronously rotating coordinate axis systems, the d axis leads the q axis by 90°, the positive direction of the voltage and current of the stator and rotor of the doubly-fed wind motor is stipulated in accordance with the motor convention, and the electromagnetic equation of the prototype motor can be used to obtain the comprehensive phasor The voltage equation of the doubly-fed wind generator represented by is:

[0031] U → s = ...

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 method for acquiring stator and rotor current redundant signals of a double-fed fan motor set. The method comprises the following steps of: acquiring ; constructing a stator current signal and a rotor current signal in a synchronous rotating coordinate system on the basis of a stator and rotor current observer algorithm of a double-fed fan motor according to a stator voltage signal, a rotor voltage signal, a rotor voltage signal and a rotor speed signal obtained by the traditional sensor; and finally, reversely transforming the stator current signal and the rotor current signal back to a static rotating coordinate so as to obtain a redundant stator current signal and a redundant rotor current signal. On one hand, the signals can be used for correcting signals of atrue sensor; on the other hand, the signals can be used for fault diagnosis of corresponding sensors, fault tolerance of the fan motor set and the like. Thus, the invention not only can omit the installation of part of hardware sensors to save cost, but also can reduce the installation space of a measuring device. The invention can effectively avoid a series of problems possibly brought by hardware redundancy design.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method for obtaining redundant signals of stator and rotor currents of a doubly-fed wind turbine. Background technique [0002] With the increasing single-unit capacity of grid-connected wind turbines in my country, and the planning, construction and operation of large-scale wind farms, especially offshore wind farms, wind turbines will face harsher operating environmental conditions and higher operating and maintenance costs. How to improve and guarantee the operational reliability and safety of wind turbines has become the focus of domestic and foreign engineering and academic circles. The control system of the grid-connected wind turbine is a comprehensive control system, including the main control system of the wind turbine, the converter system, the pitch system, and the remote monitoring system. The wind turbine control system not only needs to monitor the p...

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): H02P9/00H02P21/14H02P21/22
Inventor 李辉赵猛赵斌杨超陈宏文
Owner CHONGQING UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com