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

Instantaneous current control method of three-phase dual active bridge DC converter based on npc

A technology of DC converter and three-phase converter, which is applied in the direction of DC power input conversion to DC power output, control/regulation system, output power conversion device, etc., and can solve the problem of three-phase inductor current imbalance and converter DC Oscillation and other problems, to achieve the effect of reducing the transient process, reducing the amplitude and time of oscillation, and improving the dynamic response

Active Publication Date: 2019-04-12
XI AN JIAOTONG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the duty cycle plus phase-shift modulation strategy that introduces the duty cycle of two three-phase bridge circuits as the other two control variables, when the two duty cycle commands are changed, the three-phase inductor current will also appear Unbalanced phenomenon, which causes the DC current on both sides of the converter to oscillate

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
  • Instantaneous current control method of three-phase dual active bridge DC converter based on npc
  • Instantaneous current control method of three-phase dual active bridge DC converter based on npc
  • Instantaneous current control method of three-phase dual active bridge DC converter based on npc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, which are explanations rather than limitations of the present invention.

[0028] The topology of the NPC-based three-phase dual active bridge DC converter is as follows: figure 1 shown. where, assuming the power is from V 1 Side flow to V 2 side, the V 1 is the input side DC voltage, V 2 is the output DC voltage. Considering the case of three-phase symmetry, L a , L b and L c are the three-phase leakage inductance or additional inductance of the transformer, and their inductance values ​​are L s ; a , R b and R c They are three-phase line resistances, and their inductance values ​​are R s i a i b and i c are the three-phase inductor currents of the transformer, respectively. The transformation ratio of the three-phase high-frequency transformer is N:1. In steady state, the phase voltage functions of each phase are as f...

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 three-phase dual-active bridge type direct current converter instantaneous current control method. In a steady-state condition of the three-phase dual-active bridge type direct current converter, when the duty ratio instructions D<1, 1> and D<2, 1> of two three-phase bridge type circuits on the V<1> side and V<2> side are singly or synchronously changed into D<1, 2> and D<2, 2>, the three-phase inductive current of the transformer only flows a transitional section of a 5 / 3 switching period to reach balance by adopting two kinds of methods for adjusting the duty ratio in the transitional section, so that the direct current oscillation amplitude and time on the two sides of the converter caused by three-phase inductive current imbalance can be greatly lowered, thereby greatly improving the dynamic performance of the converter.

Description

technical field [0001] The invention belongs to the technical field of three-phase dual-active bridge-type DC converters, and in particular relates to an instantaneous current control method of an NPC-based three-phase dual-active bridge-type DC converter. Background technique [0002] The three-phase dual active bridge DC converter based on NPC is composed of a three-phase high-frequency transformer and two three-phase bridge circuits of three-level NPC, and its topology is as follows: figure 1 shown. It is an isolated bidirectional DC converter. It has the advantages of high power density, low switching stress and easy realization of soft switching. Compared with the ordinary three-phase bridge topology, NPC has the advantages of more levels, higher withstand voltage, and smaller current ripple, which makes filtering easier. In addition, compared with single-phase converters, this converter adopts a three-phase interleaved structure, which improves the power level and r...

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): H02M3/338H02M3/335
CPCH02M3/3353H02M3/33561H02M3/3381
Inventor 王跃王宁李卓强施伶崔耀雷万钧
Owner XI AN JIAOTONG 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