High-frequency Modular DC Transformer based on Clamping Switched Capacitors

被引：0
|
作者：
Sun Q. [1 ]
Li Y. [2 ]
Wang J. [3 ]
Meng J. [1 ]
Mu Q. [2 ]
机构：
[1] Department of Electrical Engineering, Tsinghua University, Haidian District, Beijing
[2] China Electric Power Research Institute, Haidian District, Beijing
[3] Shenzhen Power Supply Bureau Co., Ltd., Shenzhen, 518020, Guangdong Province
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2020年 / 40卷 / 11期
关键词：
Clamping switched capacitors; DC distribution network; DC faults isolation; Device integrated with converter and breaker function; High-frequency modular DC transformer; On-line redundant SMs;
D O I：
10.13334/j.0258-8013.pcsee.190524
中图分类号：
学科分类号：
摘要：
DC transformer (DCT) plays a key role in DC distribution grid. And to promote the engineering process and reliability of dc distribution grids, a novel clamping switched capacitors-based DC transformer (CSC-DCT) was proposed in this paper. Comparing with traditional DCT, the proposed CSC-DCT not only integrates the advantages of high power density, small volume, low noise, and current isolation between high and low voltage side, etc, but also overcome the defects of the traditional schemes. In fact, CSC-DCT is a great and feasible DCT topology with redundant sub-modules design, DC fault handling ability, flexible control method, buck-boost high-frequency-link voltages regulating ability and single-step DC voltage conversion. That is to say, CSC-DCT is a DCT integrated with converter and breaker. And to exploit the advantages of CSC-DCT to the full, the control system architecture, SM modulation strategy, DC fault isolating and recovering operation, redundant SM cuts out/in strategy, as well as the voltage, current and power characterization were proposed and analyzed in the paper. The detail experiment results validate the correctness and effectiveness of the analysis. © 2020 Chin. Soc. for Elec. Eng.
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页码：3633 / 3642
页数：9
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