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

Current predication control method based on single-phase Vienna rectifier

A technology of current prediction and control method

Inactive Publication Date: 2017-06-13
CHINA THREE GORGES UNIV
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned problems and deficiencies, the present invention proposes a current prediction control method based on single-phase Vienna rectifiers, which can eliminate the error caused by control delay as much as possible, improve the influence of control delay on current control, and make the grid current The 3rd harmonic and total harmonic distortion problems are effectively resolved

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
  • Current predication control method based on single-phase Vienna rectifier
  • Current predication control method based on single-phase Vienna rectifier
  • Current predication control method based on single-phase Vienna rectifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0066] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto. A kind of current predictive control method based on single-phase Vienna rectifier, comprises the steps:

[0067] Step (1): Deduce the circuit equation and discrete state equation of the single-phase rectifier according to Kirchhoff's law and the topology of the single-phase Vienna rectifier.

[0068] Step (2): Collect DC side capacitor voltage U C1 , U C2 , AC side current i(k) and power supply voltage U at time K s , the measured DC side voltage U C1 , U C2 Do the sum operation to get the total voltage U of the DC side dc , and put U dc and the reference value U of the total voltage on the DC side dc_ref The error signal is obtained by comparison, and the error signal is obtained by the PI controller to obtain the reference current amplitude I * .

[0069] Step (3):...

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 current predication control method based on a single-phase Vienna rectifier. The method comprises the following steps: firstly, deducing a circuit equation of the single-phase Vienna rectifier according to Kirchoff's laws and a single-phase Vienna rectifier topological structure; carrying out discrete treatment on the obtained circuit equation to obtain a single-phase Vienna rectifier discrete state equation; calculating a TS(K+2) moment current reference value by utilizing a two-ordered Lagrange's interpolation method and estimating a power grid voltage sampling value by utilizing a linear extrapolation forecasting method; predicating reference current and a periodic average error to obtain next-beat output current; finally, predicating three components to obtain next-beat predicated reference voltage UaN. By adopting the control method provided by the invention, errors caused by delaying control can be eliminated as much as possible, and influences, caused by the delaying control, on current control are improved, so that third-order harmonic and total harmonic distortion problems of power grid current are effectively solved.

Description

technical field [0001] The invention belongs to the field of Vienna rectifiers, in particular to a current predictive control method based on a single-phase Vienna rectifier. Background technique [0002] The Vienna rectifier is an effective means to control the harmonic pollution of the power grid and improve the power quality. It can reduce the harmonic content in the power grid and improve the power factor. The Vienna rectifier was proposed by scholars such as Kolar J.W. of the University of Vienna in 1994. The rectifier was first used to improve the power density of communication power supplies. Compared with the traditional rectifier topology with power factor corrector (PFC) function, the Vienna rectifier topology has a relatively simple power and control circuit, has good input current harmonic and output voltage ripple performance, and has The advantages of low source device stress, high efficiency and high power density have been widely used. The invention studies...

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): H02M7/217
CPCH02M7/2176
Inventor 马辉危伟官轲鄢圣阳
Owner CHINA THREE GORGES 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