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

Modularized multi-level current converter with hybrid-cascaded full-bridge and half-bridge sub-modules and starting method thereof

A modular multi-level, half-bridge sub-module technology, applied in the direction of power transmission AC network, output power conversion device, conversion of AC power input to DC power output, etc.

Inactive Publication Date: 2015-12-02
SHANDONG JIANZHU UNIV +1
View PDF6 Cites 43 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simply mixing full-bridge sub-modules with the same parameters and other sub-modules is not the most reasonable choice in terms of system configuration. It is urgent to propose a reasonable optimal configuration and provide corresponding control method support for the optimized configuration.

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
  • Modularized multi-level current converter with hybrid-cascaded full-bridge and half-bridge sub-modules and starting method thereof
  • Modularized multi-level current converter with hybrid-cascaded full-bridge and half-bridge sub-modules and starting method thereof
  • Modularized multi-level current converter with hybrid-cascaded full-bridge and half-bridge sub-modules and starting method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention is described in detail below in conjunction with accompanying drawing:

[0028] Such as figure 1 As shown, the modular multilevel converter in which the full-bridge and half-bridge sub-modules are mixed in the embodiment of the present invention includes three-phase units respectively connected to corresponding three-phase power supplies, and each unit includes an upper bridge arm and the lower bridge arm, the upper bridge arm and the lower bridge arm have the same structure, including M half-bridge sub-modules, N full-bridge sub-modules and inductor L 0 ;

[0029] The half-bridge sub-module includes a capacitor and a switch unit connected in parallel with the capacitor, the switch unit includes two IGBTs connected in series, and each IGBT is connected in parallel with a corresponding reverse diode;

[0030] The full-bridge sub-module includes a capacitor and two switch units connected in parallel with the capacitor, each switch unit includes two...

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 modularized multi-level current converter with hybrid-cascaded full-bridge and half-bridge sub-modules and a starting method thereof. The converter comprises three phase units in connection with a three-phase power supply. Each unit comprises an upper bridge arm and a lower bridge arm. The upper bridge arm and the lower bridge arm share the same structure and both comprise M half-bridge sub-modules, N full-bridge sub-modules and an inductor L0. As different sub-modules choose different capacitances, charging speeds are inconsistent. A conventional charging method can not meet the normal charging requirement of a sub-module hybrid-cascaded MMC topology. According to the invention, a natural soft starting phase and a soft starting voltage sharing phase are adopted so that voltages of the different sub-modules are the same.

Description

technical field [0001] The invention relates to the field of new energy and power systems, and specifically relates to a modular multilevel converter and a start-up method in which full-bridge and half-bridge sub-modules are mixed. Background technique [0002] The flexible HVDC transmission technology based on the voltage source converter has independent control of active and reactive power decoupling, can be connected to weak grids, supply power to passive loads, has grid black-start capability, fast dynamic response, excellent harmonic characteristics and occupies With many advantages such as small land area, it has been more and more widely used in large-scale intermittent new energy grid connection, island passive load power supply, AC grid interconnection, and urban intelligent power supply and distribution. [0003] German scholar Rainer Marquardt introduced the full-bridge sub-module MMC topology with the ability to ride through severe DC faults. When a DC short-circ...

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): H02M7/219H02M1/36H02J3/36
CPCY02E60/60
Inventor 辛征杨红娟张浩张秀和张黎张东陈峰高焕兵
Owner SHANDONG JIANZHU 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