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ORIGINAL RESEARCH article

Front.Electron.
Sec. Power Electronics
Volume 5 - 2024 | doi: 10.3389/felec.2024.1369905
This article is part of the Research Topic Enhancing Power Electronic Converters for Modern Power Systems View all articles

Research on Energy Transmission Mode of Three-port DC-DC converter based on ultra-thin Silicon steel

Provisionally accepted
Lei Hou Lei Hou 1Ming Zhao Ming Zhao 2Yixiao Wang Yixiao Wang 3Feng Qu Feng Qu 1Dan Shao Dan Shao 1Xin Yang Xin Yang 1Yang Liu Yang Liu 4*Zhaoning Yang Zhaoning Yang 5
  • 1 Xiong'an New Area Power Supply Company, State Grid Hebei Electric Power Co., Ltd., Xiong'an, China
  • 2 State Grid Hebei Sevice Center Co., Ltd., ShiJiaZhuang, China
  • 3 Shanghai Electric Power Design Institute Co., Ltd., Shanghai, China
  • 4 XJ Group Corporation, Xuchang, China
  • 5 Key Laboratory of Special Motors and High Voltage Electrical Appliances, Ministry of Education Shenyang University of Technology, Shenyang, China

The final, formatted version of the article will be published soon.

    With the introduction of the China's "Carbon Peaking Action Plan Before 2030", the transformation of the power industry has released huge opportunities and potentials. The DC distribution network can well coordinate the contradiction between distributed power and grid access, fully develop the benefits of distributed energy, and become a new direction for the development of the power industry. However, the current traditional DC-DC converters have problems such as single topology structure and low power density, which can only complete one-way transmission of energy, which makes the distributed energy cannot be fully utilized. For the problem of distributed energy transfer, this thesis is based on a three-port DC-DC converter for low-voltage DC distribution network to realize energy transfer between DC distribution network, distributed energy and low-voltage load. Firstly, the energy transfer modes of the three-port DC-DC converter is introduced. Combined with the converter topology and energy transfer mode, a simplified equivalent model of the converter is established. The voltage gain characteristics and frequency characteristics of this converter are studied. Furthermore, the effects of the excitation inductance to primary resonance inductance ratio parameter k and quality factor Q on the voltage gain characteristics of the converter are discussed. On this basis, the resonant cavity design of the converter is based on the optimal selection of parameters k and Q so that the converter can meet the voltage gain requirements in both forward and reverse operation. The simulation results under different loads verify the reasonableness of the resonant cavity components selection.

    Keywords: DC distribution network1, three-port DC-DC converter2, CLLLC resonant converter3, decoupling equivalence4, resonator design5

    Received: 13 Jan 2024; Accepted: 18 Jul 2024.

    Copyright: © 2024 Hou, Zhao, Wang, Qu, Shao, Yang, Liu and Yang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Yang Liu, XJ Group Corporation, Xuchang, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.