TY - GEN
T1 - A full bridge type series connected modular multilevel converters for medium voltage drive
AU - Liu, Yifu
AU - Si, Yunpeng
AU - Wang, Mengzhi
AU - Zhang, Zhengda
AU - Liu, Chunhui
AU - Lei, Qin
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/6/14
Y1 - 2021/6/14
N2 - This paper proposes a new MMC topology, in which, a "full-bridge"with four arms of cascaded full-bridge modules is applied for each phase and three phase legs are series connected in vertical direction to support the DC-link. The major advantages of proposed topology are as follows: (1) The total number of required submodules are reduced to 2/3 compared with traditional MMC topology. As a result, the volume of the converter shrinks significantly. Regarding the reduced voltage amplitude, an AC transformer is used to bring the voltage back into the normal amplitude in a three-phase Y-connection manner. (2) The second order harmonic is eliminated in the proposed unique configuration. Thus, the capacitor size is reduced and no more circulating current control loop is required. A detailed 20 MW simulation has been conducted and the related results of proposed topology have been presented. What's more, The SM prototype and preliminary experiments are also demonstrated and analyzed.
AB - This paper proposes a new MMC topology, in which, a "full-bridge"with four arms of cascaded full-bridge modules is applied for each phase and three phase legs are series connected in vertical direction to support the DC-link. The major advantages of proposed topology are as follows: (1) The total number of required submodules are reduced to 2/3 compared with traditional MMC topology. As a result, the volume of the converter shrinks significantly. Regarding the reduced voltage amplitude, an AC transformer is used to bring the voltage back into the normal amplitude in a three-phase Y-connection manner. (2) The second order harmonic is eliminated in the proposed unique configuration. Thus, the capacitor size is reduced and no more circulating current control loop is required. A detailed 20 MW simulation has been conducted and the related results of proposed topology have been presented. What's more, The SM prototype and preliminary experiments are also demonstrated and analyzed.
KW - 2order harmonic cancellation
KW - High power density
KW - MMC
UR - http://www.scopus.com/inward/record.url?scp=85115714557&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85115714557&partnerID=8YFLogxK
U2 - 10.1109/APEC42165.2021.9487273
DO - 10.1109/APEC42165.2021.9487273
M3 - Conference contribution
AN - SCOPUS:85115714557
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 267
EP - 271
BT - 2021 IEEE Applied Power Electronics Conference and Exposition, APEC 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 36th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2021
Y2 - 14 June 2021 through 17 June 2021
ER -