Control strategies of a multiport power electronic transformer (PET) for DC distribution applications

Author

Chunyang Gu ; Zedong Zheng ; Yongdong Li

Author_Institution

Dept. of Electr. Eng., Tsinghua Univ., Beijing, China

fYear

2015

fDate

21-24 June 2015

Firstpage

135

Lastpage

139

Abstract

A multiport power electronic transformer (PET) serves as the energy router (ER) of the next generation DC distribution systems. In this paper, control strategies of a multiport PET for DC distribution applications are proposed. Multiple active bridge (MAB) converters serve as the isolation units. Star and ring connected synchronization and communication methods are used in the PET system. After the introduction of single phase-shift modulation (SPM) and extended phase-shift modulation (EPM) methods of MAB, a soft switching phase-shift modulation (SSPM) method is proposed for ZVS and reduction of current stress. Powers decoupling methods as well as system control strategies are described briefly. Experimental results are given to validate the proposed topologies and strategies.

Keywords

distribution networks; power transformers; zero voltage switching; DC distribution applications; EPM methods; MAB converters; PET system; SSPM method; ZVS; control strategies; current stress reduction; energy router; extended phase-shift modulation; isolation units; multiple active bridge; multiport PET; multiport power electronic transformer; single phase-shift modulation; soft switching phase-shift modulation; Bridge circuits; Phase modulation; Ports (Computers); Positron emission tomography; Power transformer insulation; Synchronization; Topology; DC distribution; modulation; multiple active bridge (MAB); power electronic transformer (PET); power flow control;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Ship Technologies Symposium (ESTS), 2015 IEEE

Conference_Location

Alexandria, VA

Print_ISBN

978-1-4799-1856-0

Type

conf

DOI

10.1109/ESTS.2015.7157875

Filename

7157875