Voltage equalizing method for modular multilevel converter

A modular multi-level, sub-module voltage technology, which is applied in the field of power electronics and power systems, can solve the problems of serious time consumption and control system delay, and achieve the effect of reducing the time consumed

Inactive Publication Date: 2013-09-04
ZHEJIANG UNIV
View PDF2 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sorting of so many sub-module voltages leads to the time-consuming direct voltage equalization meth

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
  • Voltage equalizing method for modular multilevel converter
  • Voltage equalizing method for modular multilevel converter
  • Voltage equalizing method for modular multilevel converter

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] The present invention will be further described below with reference to the drawings and specific embodiments.

[0021] Such as figure 1 As shown, it is assumed that a bridge arm of the modular multilevel converter consists of M valve groups and a bridge arm reactor L s Each valve group is cascaded by N sub-modules of half-bridge structure. Each sub-module contains 2 fully-controlled power electronic switching devices (S1 and S2), 2 anti-parallel diodes and 1 sub-module. Module capacitance (C sm ).

[0022] Such as figure 1 As shown, the pressure equalization method of a modular multilevel converter of the present invention divides the pressure equalization of the sub-modules of the modular multilevel converter into two parts: the pressure equalization in the valve group and the pressure equalization between the valve groups. The pressure equalization in the valve group realizes the equalization of the sub-module voltages within each valve group of the modular multi-leve...

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 voltage equalizing method for a modular multilevel converter. The voltage equalizing method consists of voltage equalization in a valve bank and voltage equalization among valve banks. The voltage equalizing in the valve bank realizes the equalization of submodule voltage in each valve bank of the modular multilevel converter. The voltage equalization realizes the equalization of the average value of submodule voltage among all valve banks of the modular multilevel converter. The voltage equalizing method is used for balancing the submodule voltage of the modularized multilevel converter, is very suitable for application that the number of the submodules of the modular multilevel converter is huge and can greatly reduce time spent in sequencing the voltage of the submodules.

Description

technical field [0001] The invention relates to the fields of power electronics technology and power systems, in particular to a voltage equalization method for a modular multilevel converter. Background technique [0002] The flexible DC transmission technology and flexible AC transmission technology based on voltage source converters adopt fully-controlled power electronic switching devices and pulse width modulation strategies, and have the advantages of independent control of active power and reactive power, so they are especially suitable for multi-terminal DC transmission. , passive network power supply, grid-connected renewable energy power generation and asynchronous interconnection of AC systems, etc. Compared with conventional 2-level or 3-level voltage source converters, modular multilevel converters have the advantages of good scalability and modular design, which can effectively improve the dynamic dynamics brought about by the series-parallel connection of powe...

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): H02M7/00
Inventor 周月宾江道灼郭捷梁一桥胡鹏飞林志勇
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap