TY - JOUR
T1 - A Currentless Sorting and Selection based Capacitor-Voltage-Balancing Method for Modular Multilevel Converters
AU - Hu, Pengfei
AU - Teodorescu, Remus
AU - Wang, Songda
AU - Li, Shuqi
AU - Guerrero, Josep M.
PY - 2019/2
Y1 - 2019/2
N2 - This letter proposes a currentless sorting and selection (SAS)-based capacitor-voltage-balancing method for modular multilevel converters. Without the knowledge of arm-current signals, this method has almost the same performance as the conventional SAS method while reducing the sampling signals, compacting the control system, and saving the overall cost. In this letter, the derivative of the total capacitor voltage of an arm, instead of the arm current, is employed to determine which submodules should be inserted or bypassed. Furthermore, the efficacy of the proposed method is verified by experimental results.
AB - This letter proposes a currentless sorting and selection (SAS)-based capacitor-voltage-balancing method for modular multilevel converters. Without the knowledge of arm-current signals, this method has almost the same performance as the conventional SAS method while reducing the sampling signals, compacting the control system, and saving the overall cost. In this letter, the derivative of the total capacitor voltage of an arm, instead of the arm current, is employed to determine which submodules should be inserted or bypassed. Furthermore, the efficacy of the proposed method is verified by experimental results.
KW - Capacitor voltage balancing
KW - Currentless sorting and selection
KW - Experiments
KW - Modular Multilevel Converter
UR - http://www.scopus.com/inward/record.url?scp=85049073154&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2018.2850360
DO - 10.1109/TPEL.2018.2850360
M3 - Journal article
AN - SCOPUS:85049073154
SN - 0885-8993
VL - 34
SP - 1022
EP - 1025
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 2
M1 - 8395396
ER -