A DCM-Based Non-Isolated Step-Down DC Transformer

被引：0

作者：

Kim, Minseung ^{[1
]}

Choi, Donghee ^{[2
]}

Lee, Soo Hyoung ^{[3
]}

机构：

[1] Mokpo Natl Univ, Dept Elect Engn, Muan 58554, South Korea

[2] Cheongju Univ, Div Converged Elect Engn, Cheongju 28503, South Korea

[3] Kongju Natl Univ, Div Elect Elect & Control Engn, Cheonan 31080, South Korea

来源：

ENERGIES | 2024年 / 17卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

DC distribution; DC transformer; modular multilevel converter; non-isolated converter; step-down converter; CONVERTER; MVDC; RATIO; CONVERSION; ENERGY;

D O I：

10.3390/en17040940

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

DC transformers have emerged as essential devices for medium voltage DC (MVDC)-low voltage DC (LVDC) distribution systems. However, conventional step-down single-level converters have limits on the voltage level of the MVDC-LVDC distribution system. This paper proposes a non-isolated step-down (NISD) DC transformer based on discontinuous conduction mode (DCM). The proposed structure can withstand high voltage levels by sharing voltages between energy storage modules dividing voltage levels. The proposed NISD DC transformer determines operational modes based on energy storage modules and performs the voltage conversion process. The effectiveness of the proposed NISD DC transformer is verified based on a case study using a power system computer-aided design and electromagnetic transient simulation engine including DC (PSCAD/EMTDC (TM)).

引用

页数：13

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