High-Frequency-Link DC Transformer Based on Switched Capacitor for Medium-Voltage DC Power Distribution Application

被引：130

作者：

Zhao, Biao ^{[1
]}

Song, Qiang ^{[1
]}

Li, Jianguo ^{[2
]}

Liu, Wenhua ^{[1
]}

Liu, Guowei ^{[3
]}

Zhao, Yuming ^{[3
]}

机构：

[1] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China

[2] North China Elect Power Univ, Beijing 102206, Peoples R China

[3] Shenzhen Power Supply Corp, Shenzhen 518048, Peoples R China

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2016年 / 31卷 / 07期

基金：

中国国家自然科学基金;

关键词：

DCdistribution; dc-dc converter; dc transformer; dual active bridge (DAB); high-frequency-link; solid-state transformer (SST); switched capacitor; DISTRIBUTION-SYSTEM; CONVERTER; CONVERSION; UNIVERSAL; STRATEGY;

D O I：

10.1109/TPEL.2015.2483543

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper proposes a practical solution of high-frequency-link dc transformer based on switched capacitor (SCDCT) for medium-voltage dc (MVDC) power distribution application. Compared to the traditional dc transformer scheme, the proposed SCDCT can disconnect from MVDC distribution grid effectively as a dc breaker when a short fault occurs in the distribution, can enhance power transfer capacity, and always ensures high-frequency-link voltage match to improve current impact and efficiency performances, and the redundancy design can be achieved when some submodules fail to improve the reliability. In the paper, the topology, voltage and power characterization, control strategy, startup, and fault solution of SCDCT are presented and analyzed comprehensively. At last, an SCDCT prototype is built and the experimental results verify the correctness and effectively of the proposed solution.

引用

页码：4766 / 4777

页数：12

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