TY - GEN
T1 - A new multilevel converter with multi-winding medium-frequency transformer
AU - Zheng, Zedong
AU - Gao, Zhigang
AU - Li, Yongdong
AU - Gu, Chunyang
AU - Xu, Lie
PY - 2011
Y1 - 2011
N2 - In this paper, a novel multi-level converter was proposed where an isolated DC-DC converter with a multi-winding medium frequency transformer is used to realize the energy equalization within different cells. A cascaded H-bridge rectifier is directly connected to the AC grid and the normal input transformer was not necessary. Several separate DC buses can be produced by the cascaded H-bridge rectifier which can be inverted to medium frequency AC voltages and feed the primary windings of the multi-winding medium frequency transformer. On the secondary windings, several isolated DC buses will be produced from the output by the transformer. In this paper, the stability of the proposed converter and the equalization of the DC bus were analyzed. The control strategy of the whole system was studied and verified by some simulation and experiments.
AB - In this paper, a novel multi-level converter was proposed where an isolated DC-DC converter with a multi-winding medium frequency transformer is used to realize the energy equalization within different cells. A cascaded H-bridge rectifier is directly connected to the AC grid and the normal input transformer was not necessary. Several separate DC buses can be produced by the cascaded H-bridge rectifier which can be inverted to medium frequency AC voltages and feed the primary windings of the multi-winding medium frequency transformer. On the secondary windings, several isolated DC buses will be produced from the output by the transformer. In this paper, the stability of the proposed converter and the equalization of the DC bus were analyzed. The control strategy of the whole system was studied and verified by some simulation and experiments.
KW - cascaded H-bridge rectifier
KW - medium frequency converter
KW - multi-windings medium frequency transformer
KW - multilevel converter
KW - voltage balance
UR - http://www.scopus.com/inward/record.url?scp=80053495067&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:80053495067
SN - 9781612841670
T3 - Proceedings of the 2011 14th European Conference on Power Electronics and Applications, EPE 2011
BT - Proceedings of the 2011 14th European Conference on Power Electronics and Applications, EPE 2011
T2 - 2011 14th European Conference on Power Electronics and Applications, EPE 2011
Y2 - 30 August 2011 through 1 September 2011
ER -