TY - GEN
T1 - New modular multilevel converter with power channels between upper- and lower arms suitable for MV drives
AU - He, Liqun
AU - Zhang, Kai
AU - Xiong, Jian
AU - Fan, Shengfang
AU - Chen, Xiaosen
AU - Xue, Yaosuo
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/5/8
Y1 - 2015/5/8
N2 - When a modular multilevel converter (MMC) is operated at low frequencies, the submodule (SM) capacitors will suffer from huge voltage fluctuations. This problem must be overcome before MMCs find wider applications in medium voltage (MV) drives that require a wide speed range. The established solution for suppressing the voltage fluctuation have been injecting high frequency common-mode voltage and circulating current into each phase leg. This inevitably increases current stress of the power devices, which is not welcome in high power applications. Based on the fact that the pulsating powers of the upper- and lower arms are in opposite phase, this paper aims to eliminate the voltage fluctuation via added power channels between the upper- and lower arms of each phase. These power channels can also be used for active power decoupling, which can greatly reduce the SM capacitance.
AB - When a modular multilevel converter (MMC) is operated at low frequencies, the submodule (SM) capacitors will suffer from huge voltage fluctuations. This problem must be overcome before MMCs find wider applications in medium voltage (MV) drives that require a wide speed range. The established solution for suppressing the voltage fluctuation have been injecting high frequency common-mode voltage and circulating current into each phase leg. This inevitably increases current stress of the power devices, which is not welcome in high power applications. Based on the fact that the pulsating powers of the upper- and lower arms are in opposite phase, this paper aims to eliminate the voltage fluctuation via added power channels between the upper- and lower arms of each phase. These power channels can also be used for active power decoupling, which can greatly reduce the SM capacitance.
KW - medium voltage drives
KW - modular multilevel converter
KW - power channel
UR - http://www.scopus.com/inward/record.url?scp=84937851766&partnerID=8YFLogxK
U2 - 10.1109/APEC.2015.7104441
DO - 10.1109/APEC.2015.7104441
M3 - Conference contribution
AN - SCOPUS:84937851766
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 799
EP - 805
BT - APEC 2015 - 30th Annual IEEE Applied Power Electronics Conference and Exposition
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015
Y2 - 15 March 2015 through 19 March 2015
ER -