TY - GEN
T1 - Analysis and design of Modular Multi-level DC/DC Converter
AU - Han, Xu
AU - Wen, Huiqing
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/8/1
Y1 - 2021/8/1
N2 - Bidirectional DC-DC converter plays an important role in distributed power generation system due to it is necessary to control the power flow between energy storage devices and DC bus. The conventional phase-shifted dual-active-bridge (PS-DAB) converter inherits simple control, symmetrical stricture, and zero voltage switching (ZVS). However, large dv/dt will be created when applied in a high voltage range. Modular multi-level DC transformer (MMDC) originates in the modular multi-level converter (MMC) and dual active bridge (DAB). The MMDC topology can be obtained via displacing the power devices in the primary side of DAB with series-connected submodules. A vital issue to ensure MMDC is operating in a stable state is balancing the capacitor voltage of each submodule in the arm. A capacitor voltage balance method is proposed in this paper. The operating principle is reassigning the gate signals of higher capacitor voltage submodules (SMs) to lower capacitor voltage SMs. According to the simulation results, the capacitor voltage has different outputs. The N}+1 level change of each N-SMs-arm balanced when the MMDC starts, which means that EMI and dv/dt are reduced in the transformer pressure.
AB - Bidirectional DC-DC converter plays an important role in distributed power generation system due to it is necessary to control the power flow between energy storage devices and DC bus. The conventional phase-shifted dual-active-bridge (PS-DAB) converter inherits simple control, symmetrical stricture, and zero voltage switching (ZVS). However, large dv/dt will be created when applied in a high voltage range. Modular multi-level DC transformer (MMDC) originates in the modular multi-level converter (MMC) and dual active bridge (DAB). The MMDC topology can be obtained via displacing the power devices in the primary side of DAB with series-connected submodules. A vital issue to ensure MMDC is operating in a stable state is balancing the capacitor voltage of each submodule in the arm. A capacitor voltage balance method is proposed in this paper. The operating principle is reassigning the gate signals of higher capacitor voltage submodules (SMs) to lower capacitor voltage SMs. According to the simulation results, the capacitor voltage has different outputs. The N}+1 level change of each N-SMs-arm balanced when the MMDC starts, which means that EMI and dv/dt are reduced in the transformer pressure.
KW - bidirectional DC-DC converter
KW - modular-mutilevel structure
KW - submodule voltage balance
UR - http://www.scopus.com/inward/record.url?scp=85115444320&partnerID=8YFLogxK
U2 - 10.1109/ICIEA51954.2021.9516112
DO - 10.1109/ICIEA51954.2021.9516112
M3 - Conference Proceeding
AN - SCOPUS:85115444320
T3 - Proceedings of the 16th IEEE Conference on Industrial Electronics and Applications, ICIEA 2021
SP - 649
EP - 654
BT - Proceedings of the 16th IEEE Conference on Industrial Electronics and Applications, ICIEA 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 16th IEEE Conference on Industrial Electronics and Applications, ICIEA 2021
Y2 - 1 August 2021 through 4 August 2021
ER -