Review of topology and control strategy of medium- and low-voltage DC transformer

被引：0
|
作者：
Liu B. [1 ]
Tu C. [1 ]
Xiao F. [1 ]
Yu X. [1 ]
Guo Q. [1 ]
Shuai Z. [1 ]
机构：
[1] National Engineering Research Center for Power Conversion and Control, Hunan University, Changsha
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2021年 / 41卷 / 05期
关键词：
Control strategy; DC power grid; DC transformer; High-frequency transformer; Topology structure;
D O I：
10.16081/j.epae.202105042
中图分类号：
学科分类号：
摘要：
The DC transformer is the core equipment for voltage conversion and energy distribution in DC power grid, and its operating characteristics have profound impacts on DC power grid. Based on this, the current research status of DC transformers in medium- and low-voltage DC power grids is summarized and analyzed. Firstly, the basic functions and typical operating scenarios of DC transformers are briefly explained. Considering that the topology of DC transformer is the key to adapt to different voltage levels, the topologies of DC transformer are classified from the perspectives of the port numbers and energy coupling methods, and the main characteristics of various topologies are distinguished. Secondly, the control strategies of DC transformers in steady-state and transient operation processes, including efficiency optimization, soft-start, DC bias current suppression, etc., are comprehensively analyzed, which can ensure the efficient and reliable operation of DC transformer under complex working conditions. Thirdly, the key technologies of the core component of DC transformer, i.e. high-frequency transformer, are discussed to provide a reference for the selection and design of high-frequency transformers. Finally, the future development trend of DC transformer is prospected. © 2021, Electric Power Automation Equipment Press. All right reserved.
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页码：232 / 246
页数：14
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