TY - GEN
T1 - Investigation of Optimal Excitation Waveforms for Medium Frequency Transformers
AU - Zhang, Zhengda
AU - Zhang, Lei
AU - Qin, Jiangchao
AU - Duan, Qing
AU - Sheng, Wanxing
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/12/3
Y1 - 2018/12/3
N2 - Medium frequency transformer (MFT) is the key component for solid state transformer (SST) applications. It provides voltage conversion and galvanic isolation between medium/high-voltage side and low-voltage side. The employment of the MFT can significantly reduce volume and weight of power conversion systems. For high-power medium/high-voltage applications, multilevel converters are the most promising topology and applicable for SST applications. Compared to the conventional full-bridge or half-bridge converters producing square excitation voltage waveforms for the MFT, multilevel converters can generate controllable multilevel excitation voltage waveforms, which potentially improves efficiency and controllability of the SST. In this paper, various excitation voltage waveforms for the MFT are investigated and the optimal multilevel excitation voltage waveforms are identified in terms of total losses and system complexity. Meanwhile, factors affecting core loss and winding loss of the MFT are explored. These factors are applicable for transformer loss analysis under arbitrary excitation waveforms.
AB - Medium frequency transformer (MFT) is the key component for solid state transformer (SST) applications. It provides voltage conversion and galvanic isolation between medium/high-voltage side and low-voltage side. The employment of the MFT can significantly reduce volume and weight of power conversion systems. For high-power medium/high-voltage applications, multilevel converters are the most promising topology and applicable for SST applications. Compared to the conventional full-bridge or half-bridge converters producing square excitation voltage waveforms for the MFT, multilevel converters can generate controllable multilevel excitation voltage waveforms, which potentially improves efficiency and controllability of the SST. In this paper, various excitation voltage waveforms for the MFT are investigated and the optimal multilevel excitation voltage waveforms are identified in terms of total losses and system complexity. Meanwhile, factors affecting core loss and winding loss of the MFT are explored. These factors are applicable for transformer loss analysis under arbitrary excitation waveforms.
KW - Core loss
KW - Medium frequency transformer
KW - Multilevel converter
KW - Multilevel excitation voltage
KW - Power electronic transformer
KW - Solid state transformer
KW - Winding loss
UR - http://www.scopus.com/inward/record.url?scp=85060284875&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85060284875&partnerID=8YFLogxK
U2 - 10.1109/ECCE.2018.8558423
DO - 10.1109/ECCE.2018.8558423
M3 - Conference contribution
AN - SCOPUS:85060284875
T3 - 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
SP - 1382
EP - 1387
BT - 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018
Y2 - 23 September 2018 through 27 September 2018
ER -