Comparison on unbalanced-load handling capability of two power electronic transformer topologies

Author

Xinyu Wang ; Shaodi Ouyang ; Jinjun Liu ; Taotao Xu ; Xiaojian Wang ; Linyuan Zhou

Author_Institution

State Key Lab. of Electr. Insulation & Power Equip., Xi´an Jiaotong Univ., Xi´an, China

fYear

2013

fDate

15-19 Sept. 2013

Firstpage

5266

Lastpage

5272

Abstract

Power electronic transformer (PET) has many merits as compared with traditional power transformer. In this paper, the unbalanced-load handling capability of two H-bridge based modular PET topologies, the separate-phase-connection (SPC) one and the cross-phase-connection (CPC) one, are analyzed. The two topologies consist of input stage, isolation stage and output stage. The related operating ranges for the two topologies are obtained if the system is confirmed. It finds that the former can deal with full-range unbalanced load if device current stress of the input-stage is increased to 115% while the latter is suitable for dealing with partial unbalanced-load conditions. From practical point of view, the former is more suitable for practical applications. Simulation results verify the analysis.

Keywords

power transformers; CPC; H-bridge based modular PET topology; SPC; cross-phase-connection; partial unbalanced-load conditions; power electronic transformer topology; separate-phase-connection; unbalanced-load handling capability; Inductors; Positron emission tomography; Power transformer insulation; Stress; Topology; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2013 IEEE

Conference_Location

Denver, CO

Type

conf

DOI

10.1109/ECCE.2013.6647414

Filename

6647414