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

N-output three-phase 3N+3-switch-group MMC inverter and control method of N-output three-phase 3N+3-switch-group MMC inverter

A switch group and inverter technology, applied in the direction of output power conversion device, AC power input conversion to DC power output, irreversible DC power input conversion to AC power output, etc., can solve the problems of increasing project costs, etc. Achieve the effect of solving pressure equalization problem, improving quality and reducing engineering cost

Active Publication Date: 2014-05-07
SOUTH CHINA UNIV OF TECH
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when N three-phase AC lines with different frequencies are connected, 2N MMC converters are needed, which greatly increases the engineering cost

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
  • N-output three-phase 3N+3-switch-group MMC inverter and control method of N-output three-phase 3N+3-switch-group MMC inverter
  • N-output three-phase 3N+3-switch-group MMC inverter and control method of N-output three-phase 3N+3-switch-group MMC inverter
  • N-output three-phase 3N+3-switch-group MMC inverter and control method of N-output three-phase 3N+3-switch-group MMC inverter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] In order to further illustrate the content and features of the present invention, the specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. But the implementation of the present invention is not limited thereto.

[0021] refer to figure 1 , the N-output three-phase 3N+3 switch group MMC inverter of the present invention includes a DC power supply U dc , the first bridge arm, the second bridge arm, the third bridge arm, and N three-phase loads; the first bridge arm consists of N+1 switch groups (B u1 , B u2 ,...,B u(N+1) ) and 2 inductors (L u1 , L u2 ) in series, and the second bridge arm consists of N+1 switch groups (B v1 , B v2 ,...,B v(N+1) ) and 2 inductors (L v1 , L v2 ) in series, and the third bridge arm consists of N+1 switch groups (B w1 , B w2 ,...,B w(N+1) ) and 2 inductors (L w1 , L w2 ) in series; the i-th switch group B of the first bridge arm ui consists of n power s...

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 an N-output three-phase 3N+3-switch-group MMC inverter and a control method of the N-output three-phase 3N+3-switch-group MMC inverter. The inverter comprises a direct current power source, a first bridge arm, a second bridge arm, a third bridge arm and N three-phase loads. The three bridge arms are respectively formed by N+1 switch groups and two inductors in a series connection mode, and each switch group of each bridge arm is formed by n power switch units in a series connection mode. The three ends of the kth three-phase load are connected with the upper ends of the k+1th switch groups of the three bridge arms respectively, wherein the k ranges from 1 to N-1. The three ends of the Nth three-phase load are connected with the lower ends of the Nth switch groups of the three bridge arms. According to the inverter, carrier phase-shifting PWM control is adopted, N three-phase alternating currents with the 2n+1-level line voltages are output, the voltage stress borne by each switch tube in each MMC power switch unit is only 1 / n of the voltage stress of the direct current power source, and the inverter and the control method are suitable for high-voltage, high-power and three-phase alternating current double-load occasions.

Description

technical field [0001] The invention relates to the field of module combined multilevel (MMC) converters, in particular to an N-output three-phase 3N+3 switch group MMC inverter and a control method thereof. Background technique [0002] At present, power converters are developing in the direction of miniaturization, high reliability and low loss. Under this trend, there are two directions for improving the converter: reducing passive components or improving the topology of the converter to reduce active components. New progress in the direction of source devices. Compared with the traditional 6N switching converter, the three-phase 3N+3 switching converter reduces 3N-3 switches and corresponding driving circuits, and has certain advantages in applications considering cost and volume. However, the N single-phase outputs of the 3N+3 switching converter are all two-level, and the output AC waveform is relatively poor. In addition, the voltage stress of each switch in the 3N+...

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 Applications(China)
IPC IPC(8): H02M7/48H02M7/539
Inventor 张波付坚丘东元
Owner SOUTH CHINA UNIV OF TECH
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