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

Control method based on dual-vector resonance adjusting double-fed asynchronous wind driven generator

A wind turbine, resonance adjustment technology, applied in motor generator control, vector control system, electronic commutation motor control and other directions, can solve the adverse effects of system operation rapidity and stability, reduce system response rapidity, rotor current The reference value calculation process is complicated, etc.

Active Publication Date: 2013-05-22
ZHEJIANG UNIV
View PDF5 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The extraction of positive and negative sequences and harmonic components mentioned above introduces a large number of coordinate rotation transformations and notch filters, resulting in a large control delay, which is likely to cause unstable operation of the system and reduce the rapidity of system response
In addition, the calculation process of the rotor current reference value is complicated, and the calculation results need to be rotated to the positive synchronous speed rotating coordinate system, which also adversely affects the rapidity and stability of the system operation

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
  • Control method based on dual-vector resonance adjusting double-fed asynchronous wind driven generator
  • Control method based on dual-vector resonance adjusting double-fed asynchronous wind driven generator
  • Control method based on dual-vector resonance adjusting double-fed asynchronous wind driven generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] In order to describe the present invention more specifically, the DFIG control method of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] Such as figure 2 As shown, a control method for doubly-fed asynchronous wind generator based on dual-vector resonance regulation, including the following steps:

[0037] (1) Utilize Hall voltage sensor 5 to gather the three-phase stator voltage U of DFIG sa ~ U sc , using the Hall current sensor 4 to collect the three-phase stator current I of DFIG sa ~I sc , three-phase rotor current I ra ~I rc ; Utilize encoder 7 to detect the rotational speed ω of DFIG r and the rotor position angle θ r ; Use the enhanced phase-locked loop 9 to detect the angular frequency ω of the positive sequence component in the three-phase grid voltage 1 and phase θ 1 ;

[0038] First, use the Clarke transformation module 10 to respectively transform the three-ph...

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 control method based on a dual-vector resonance adjusting double-fed asynchronous wind driven generator. The control method utilizes dual-vector resonance adjusting technology. Vector resonance adjusting with angular frequency being double base frequency can restrain adverse influence caused by negative sequence components in power grid voltage. Vector resonance adjusting with angular frequency being six-fold base frequency can adverse influences caused by five-time harmonic wave components and seven-time harmonic wave components in power grid voltage. No negative sequence and harmonic component extraction of power grid voltage, stator current or rotor current during all closed-loop adjusting is needed. By the method, no complex positive negative sequence and harmonic component extraction is needed, no complex rotor current reference calculation is needed, control delay is reduced greatly, and quickness and stability of a system is improved.

Description

technical field [0001] The invention belongs to the technical field of wind power generation control, and in particular relates to a control method for adjusting a doubly-fed asynchronous wind power generator based on double-vector resonance. Background technique [0002] As a clean and renewable energy, wind energy has been highly valued by countries all over the world in recent years. The reserves of wind energy are huge. With the development and utilization of wind energy, the global wind power generation has maintained rapid and continuous growth for many years. Doubly-fed asynchronous wind turbines are widely used due to their own constant-speed variable-frequency operation capabilities, the required converter capacity only accounts for about 30% of the unit capacity, and four-quadrant operation capabilities. However, DFIG (double-fed asynchronous wind generator) units operating under harsh grid voltage conditions such as imbalance and harmonic distortion will show sta...

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): H02P21/00H02P21/14H02J3/01H02P21/20
CPCY02E40/40
Inventor 年珩
Owner ZHEJIANG UNIV
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