A three-phase integrated power electronic transformer with capability of DC fault clearance

This paper presents a three-phase integrated power electronic transformer (PET) topology with the capability of DC fault clearance based on the investigation of PET topology. The proposed PET has three ports of high-voltage AC, high-voltage DC and low-voltage DC, which can achieve the flexible acces...

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Bibliographic Details
Published in:CSEE Journal of Power and Energy Systems 2021-07, Vol.7 (4), p.785-796
Main Authors: Yunfei Xu, Guangfu Tang, Weiguo Li, Guoliang Zhao, Zhanfeng Deng
Format: Article
Language:English
Subjects:
Capacitors
Clearances
Distributed generation
Electric converters
Energy
Energy sources
High voltages
R&D
Research & development
Short circuits
Topology
Transformers
Voltage converters (DC to DC)
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Summary:This paper presents a three-phase integrated power electronic transformer (PET) topology with the capability of DC fault clearance based on the investigation of PET topology. The proposed PET has three ports of high-voltage AC, high-voltage DC and low-voltage DC, which can achieve the flexible access of distributed energy resources. The power unit of the PET adopts a three-phase integrated topology, and the single-phase fluctuating power in the DC-link capacitor is reduced by a 4-port DC/DC converter, thereby reducing the capacitance of the DC-link capacitor; Meanwhile, the power unit uses the clamp double sub-module(CDSM) to allow for self-clearing of the short-circuit fault on the high-voltage DC side. Finally, this paper verifies the proposed PET through an EMT simulation and experimental prototype.
ISSN:2096-0042
2096-0042
DOI:10.17775/CSEEJPES.2019.03090