TY - GEN
T1 - Voltage balance control of a modular cascaded converter with MWHF transformer
AU - Zheng, Zedong
AU - Wang, Kui
AU - Gu, Chunyang
AU - Li, Yongdong
PY - 2013
Y1 - 2013
N2 - In this paper, a novel modular cascaded converter with multi-winding high-frequency (MWHF) transformer is proposed for the applications in medium or high voltage fields. A cascaded H-bridge rectifier is used to connect directly with the input AC source while the step-down transformer is not needed. Then an isolated DC-DC converter composed by a group of H-bridge DC-AC converters and a high frequency transformer with high power density is used to realize isolation of the DC buses produced by the rectifier. A voltage balance control method for all the DC buses under unbalanced loads is proposed in this paper by the energy exchange through the multi-winding transformer, which is realized by the phase adjustment of the windings end voltages. Experiments are implemented to verify the performance of the proposed converter and voltage balance algorithm.
AB - In this paper, a novel modular cascaded converter with multi-winding high-frequency (MWHF) transformer is proposed for the applications in medium or high voltage fields. A cascaded H-bridge rectifier is used to connect directly with the input AC source while the step-down transformer is not needed. Then an isolated DC-DC converter composed by a group of H-bridge DC-AC converters and a high frequency transformer with high power density is used to realize isolation of the DC buses produced by the rectifier. A voltage balance control method for all the DC buses under unbalanced loads is proposed in this paper by the energy exchange through the multi-winding transformer, which is realized by the phase adjustment of the windings end voltages. Experiments are implemented to verify the performance of the proposed converter and voltage balance algorithm.
UR - http://www.scopus.com/inward/record.url?scp=84879378216&partnerID=8YFLogxK
U2 - 10.1109/APEC.2013.6520624
DO - 10.1109/APEC.2013.6520624
M3 - Conference contribution
AN - SCOPUS:84879378216
SN - 9781467343541
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 2355
EP - 2360
BT - 2013 28th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2013
T2 - 28th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2013
Y2 - 17 March 2013 through 21 March 2013
ER -