Topology and Control Strategy of Multi-Port DC Power Electronic Transformer Based on Soft Switching

Jialin Zhang (), Kunpeng Zha, Xiaojun Tang, Yuefeng Yang, Lanfang Li and Jiafei Li
Additional contact information
Jialin Zhang: School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Kunpeng Zha: NARI Group Corporation, Nanjing 211106, China
Xiaojun Tang: School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Yuefeng Yang: China Power NARI Purui Engineering Co., Ltd., Beijing 102299, China
Lanfang Li: China Power NARI Purui Engineering Co., Ltd., Beijing 102299, China
Jiafei Li: China Power NARI Purui Engineering Co., Ltd., Beijing 102299, China

Energies, 2025, vol. 18, issue 2, 1-17

Abstract: Multi-port DC power electronic transformer (PET) is a core equipment for achieving transformation of different voltage levels and flexible interconnection of different DC buses in a DC distribution system. It is capable of bidirectional energy flow, flexible regulation of power flow, port fault isolation, and other functions. A new five-port DC transformer topology based on soft switching technology is proposed in this paper. In this topology, different DC voltage levels can be interconnected efficiently, such as 20 kV, 750 V, ±375 V, and 300 to 500 V adjustable. The control of each port is simple and flexible. The output voltage is stable, and they are independent of each other, which can improve the system reliability. The topology of the proposed multi-port DC transformer is introduced in detail. The working principle, control strategy, and parameter design method of the transformer are analyzed. Simulations and experimental results are provided to validate the theoretical analysis.

Keywords: DC distribution network; DC transformer; multi-port converter; soft switching; flexible interconnection (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/2/400/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/2/400/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:18:y:2025:i:2:p:400-:d:1569624

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().