TY - GEN
T1 - Modular multilevel converter with full-bridge submodules and improved low-frequency ripple suppression for medium-voltage drives
AU - He, Liqun
AU - Zhang, Kai
AU - Xiong, Jian
AU - Fan, Shengfang
AU - Xue, Yaosuo
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/5/8
Y1 - 2015/5/8
N2 - Due to the low-frequency voltage fluctuation problem, application of modular multilevel converters (MMC) in wide-speed-range medium-voltage (MV) drives is still difficult. This paper proposes a new approach to this problem. Firstly, full-bridge submodules (FB-SM) are used in place of the traditional half-bridge submodules (HB-SM). The former can significantly reduce the low-frequency pulsating power in the SM capacitors. Secondly, an improved 'square wave plus third-order harmonic injection' with quasi-resonant (QR) control scheme is proposed to transfer the low-frequency ripple power into high-frequency ones. Simulation and experimental results prove the validity of proposed method. A comparison between the FB-SM based and HB-SM based MMCs showed good potential of the former in MV drive applications.
AB - Due to the low-frequency voltage fluctuation problem, application of modular multilevel converters (MMC) in wide-speed-range medium-voltage (MV) drives is still difficult. This paper proposes a new approach to this problem. Firstly, full-bridge submodules (FB-SM) are used in place of the traditional half-bridge submodules (HB-SM). The former can significantly reduce the low-frequency pulsating power in the SM capacitors. Secondly, an improved 'square wave plus third-order harmonic injection' with quasi-resonant (QR) control scheme is proposed to transfer the low-frequency ripple power into high-frequency ones. Simulation and experimental results prove the validity of proposed method. A comparison between the FB-SM based and HB-SM based MMCs showed good potential of the former in MV drive applications.
KW - full-bridge submodule
KW - medium-voltage drives
KW - modular multilevel converter
UR - http://www.scopus.com/inward/record.url?scp=84937848501&partnerID=8YFLogxK
U2 - 10.1109/APEC.2015.7104668
DO - 10.1109/APEC.2015.7104668
M3 - Conference contribution
AN - SCOPUS:84937848501
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 2288
EP - 2294
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 -