A single-stage AC-AC solid-state transformer with ZVS operation
发布时间：2021-07-27
点击次数：
影响因子：2.641
DOI码：10.1049/pel2.12033
发表刊物：IET Power Electronics
关键字：LLC RESONANT CONVERTER;DESIGN;RANGE
摘要：Solid-state transformer (SST) is an attractive concept, which provides galvanic isolation and voltage scaling by means of a medium-frequency link. In this paper, a single-stage alternative current (AC)-AC SST solution without bulky energy storage elements is presented. The front-end rectifier (FER) and rear-end inverter (REI) of the SST works at line-frequency, while the intermediate LLC series resonant converter (SRC) fulfils the tasks of galvanic isolating and regulating the output voltage. To achieve high efficiency and bidirectional power flow capability of the SST, the zero voltage switching (ZVS) condition of the LLC SRC is comprehensively analysed, and the parameters design method of the LLC SRC is developed, where the resonant currents are constructed by applying the same gating signals to the primary-side and secondary-side bridges and the dead-time is properly selected. Consequently, the presented SST has the merits of high conversion efficiency, naturally bidirectional power flow capability, potentially high power density and high reliability. The experimental results on a 1.5 kW SST prototype show that sinusoidal input and output current, ZVS operation over the full load range are achieved, and the peak efficiency is 97.63%. The experimental results verify the functionality and effectiveness of the developed methods.
合写作者：Xu, Ming, Zhang, Yichun, Sun, Yao, Zhang, Guanguan, Blaabjerg, Frede, Liang, Xiao, Feng, Jianghua
第一作者：Wang, Hui
论文类型：期刊论文
通讯作者：Liu, Yonglu
论文编号：20212710580492
学科门类：工学
一级学科：电气工程
文献类型：J
卷号：14
期号：2
页面范围：290-301
ISSN号：1755-4535
是否译文：否
发表时间：2021-02-14
收录刊物：SCI
发布期刊链接：https://www.webofscience.com/wos/alldb/full-record/WOS:000606634300001
附件：
A single-stage AC-AC solid-state transformer with ZVS operation.pdf