Power electronic transformer power balance control method and system based on H-bridge chained mode

A technology of power electronics and balanced control, which is applied in the direction of control/regulation system, electric variable adjustment, output power conversion device, etc. It can solve the problems of low reliability and high cost of realization complexity, and achieve high reliability, low cost and high realization simple effect

Inactive Publication Date: 2016-04-06
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +6
View PDF2 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a power electronic transformer power balance control method and system based on H-bridge chain, to solve the problems of low reliability and high cost of implementation in the current transformer balance control method

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
  • Power electronic transformer power balance control method and system based on H-bridge chained mode
  • Power electronic transformer power balance control method and system based on H-bridge chained mode
  • Power electronic transformer power balance control method and system based on H-bridge chained mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0025] Power Electronic Transformer (PowerElectronic Transformer, PET) consists of three-level topology, such as figure 1 As shown, it is composed of high-voltage stage, isolation stage and low-voltage stage. The high-voltage stage is an H-bridge chain structure, which can realize the access of different voltage levels, and the grid-connected voltage and current harmonics are small; the isolation stage is connected in parallel by N DABs, Realize the bidirectional flow of energy and electrical isolation, and provide a low-voltage DC bus, which can be connected to DC loads; the low-voltage stage uses a three-phase four-leg inverter as a voltage source to meet the connection of single-phase and three-phase AC loads. Aiming at the problem of high-voltage level DC voltage balance and isolation level bidirectional full-bridge DC / DC converter (Dual...

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 relates to a power electronic transformer power balance control method and system based on an H-bridge chained mode. The difference value between direct current voltage of a sub-module of each current conversion chain and the voltage mean value of the current conversion chain is subjected to closed loop control to obtain correction amount of each DBA direction-moving angle; the direction-moving angle is corrected according to the obtained correction amount of each DBA direction-moving angle, and the DBA transmission active power is adjusted by the corrected direction-moving angle, so that the problem that the active power cannot be transmitted to the low voltage side in a balanced manner caused by magnitude of isolated level connecting electric reactor, high frequency transformer leakage reactance, difference of ratio of transformation and the like. The power electronic transformer power balance control method and system are based on high-voltage-level direct current voltage balance and isolated-level DBA power balance equivalence for correcting each DBA direction-moving angle; the high-voltage-level direct current voltage balance and the isolated-level transmission power balance are realized, and the stable operation of the PET (power electronic transformer) is ensured; and in addition, the control method and system are simple to realize without detecting the direct current of all DABs, low in cost and high in reliability.

Description

technical field [0001] The invention relates to a power electronic transformer power balance control method and system based on an H-bridge chain type, and belongs to the technical field of power electronic transformer power balance control. Background technique [0002] Compared with traditional transformers, power electronic transformers (PowerElectronic Transformer, PET) have the advantages of small size, light weight, less environmental pollution, constant output voltage amplitude, and adjustable power factor. PET can realize functions such as bidirectional flow of energy, power flow control and power quality control. With the rapid development of high-power semiconductor devices and magnetic materials, PET has become a key equipment for smart grid construction. The three-stage PET topology has become a research hotspot due to its good control characteristics, low-voltage DC link, and the ability to provide interfaces for distributed generation access. [0003] Aiming a...

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): H02M3/335H02M5/458
CPCH02M3/3353H02M5/4585H02M1/0083
Inventor 胡博赵海森冯宇鹏吴金龙王先为牛化鹏刘欣和姚为正
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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