TY - JOUR
T1 - Four-quad multilevel converter
AU - Gao, Zhigang
AU - Dong, Lei
AU - Liao, Xiaozhong
AU - Zhuang, Yaping
AU - Zhou, Dejia
PY - 2013/6
Y1 - 2013/6
N2 - A four-quad multilevel converter topology is proposed, which is composed of H-bridge rectifier, middle-frequency transformer and cascaded H-bridge inverter. The power flow model of converter is established, and its control algorithm and modulation strategy are presented. The output voltage model of input-side converter is analyzed and the corresponding modulation strategy is proposed. The working phase of each middle-frequency H-bridge is described, which functions to keep the voltage balance for each capacitor and realize the four-quad operation of converter. The experimental result validates the correctness of the proposed topology and algorithm. Without the power frequency transformer, the proposed converter has small size and weight, and is applicable in high-voltage large-capacity condition.
AB - A four-quad multilevel converter topology is proposed, which is composed of H-bridge rectifier, middle-frequency transformer and cascaded H-bridge inverter. The power flow model of converter is established, and its control algorithm and modulation strategy are presented. The output voltage model of input-side converter is analyzed and the corresponding modulation strategy is proposed. The working phase of each middle-frequency H-bridge is described, which functions to keep the voltage balance for each capacitor and realize the four-quad operation of converter. The experimental result validates the correctness of the proposed topology and algorithm. Without the power frequency transformer, the proposed converter has small size and weight, and is applicable in high-voltage large-capacity condition.
KW - Carrier phase shifting
KW - Electric converters
KW - H-bridge
KW - Middle-frequency transformer
KW - Voltage control
UR - http://www.scopus.com/inward/record.url?scp=84879700939&partnerID=8YFLogxK
U2 - 10.3969/j.issn.1006-6047.2013.06.010
DO - 10.3969/j.issn.1006-6047.2013.06.010
M3 - Article
AN - SCOPUS:84879700939
SN - 1006-6047
VL - 33
SP - 52-57+69
JO - Dianli Zidonghua Shebei / Electric Power Automation Equipment
JF - Dianli Zidonghua Shebei / Electric Power Automation Equipment
IS - 6
ER -