TY - GEN
T1 - Start-up control with constant precharge current for the modular multilevel converter
AU - Binbin, Li
AU - Yi, Zhang
AU - Dianguo, Xu
AU - Rongfeng, Yang
PY - 2014/7
Y1 - 2014/7
N2 - One specific issue associated with the modular multilevel converter (MMC) is that the capacitors of the submodules (SMs) need to be precharged before MMC begins its normal operating. Otherwise, a large inrush current will occur if these SM capacitors were not charged to the rated value. This paper proposes a novel start-up control scheme for MMC, in which the closed-loop control is adopted to regulate a constant rms precharge current with a unity power factor. As such, the SM capacitors will be linearly precharged to the rated value without any inrush current and much shortened charging time. Moreover, this scheme requires no extra power supply and is very flexible as it can be easily implemented into any MMC application regardless of the power rating and the number of SMs. Finally, a three-phase MMC prototype has been built in the laboratory to verify the effectiveness of the proposed start-up control scheme.
AB - One specific issue associated with the modular multilevel converter (MMC) is that the capacitors of the submodules (SMs) need to be precharged before MMC begins its normal operating. Otherwise, a large inrush current will occur if these SM capacitors were not charged to the rated value. This paper proposes a novel start-up control scheme for MMC, in which the closed-loop control is adopted to regulate a constant rms precharge current with a unity power factor. As such, the SM capacitors will be linearly precharged to the rated value without any inrush current and much shortened charging time. Moreover, this scheme requires no extra power supply and is very flexible as it can be easily implemented into any MMC application regardless of the power rating and the number of SMs. Finally, a three-phase MMC prototype has been built in the laboratory to verify the effectiveness of the proposed start-up control scheme.
KW - constant current control
KW - modular multilevel converter (MMC)
KW - start-up
UR - https://www.scopus.com/pages/publications/84907328441
U2 - 10.1109/ISIE.2014.6864692
DO - 10.1109/ISIE.2014.6864692
M3 - Conference article published in proceeding or book
AN - SCOPUS:84907328441
SN - 9781479923991
T3 - IEEE International Symposium on Industrial Electronics
SP - 673
EP - 676
BT - Proceedings - 2014 IEEE 23rd International Symposium on Industrial Electronics, ISIE 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 IEEE 23rd International Symposium on Industrial Electronics, ISIE 2014
Y2 - 1 June 2014 through 4 June 2014
ER -