TY - GEN
T1 - Capacitor Voltage Ripple Reduction Methods of Modular Multilevel Converter under Unbalanced Fault Conditions
T2 - 2018 IEEE International Power Electronics and Application Conference and Exposition, PEAC 2018
AU - Wang, Songda
AU - Teodorescu, Remus
AU - Chaudhary, Sanjay K.
PY - 2018/11
Y1 - 2018/11
N2 - Modular Multilevel Converter (MMC) is one of the most promising converter topology in medium/high-voltage applications. Reduction of capacitor voltage ripple during unbalanced grid conditions is very important for stable operation. A comparison of capacitor voltage ripple suppression methods under unbalanced conditions is presented in this paper. Three methods are explained and compared in simulation: circulating current specific sequence elimination method (CCSSE), instantaneous circulating current optimization method (ICCO), and arm current control method (ACC). The simulation model of these three methods are achieved in PLECS, the results show that the ICCO has best submodules capacitors voltage ripple reduction effect, but it will increase the peak arm current and DC line current ripple. CCSSE and ACC methods balance three phase energy in different perspectives, but the essence of these two methods are same.
AB - Modular Multilevel Converter (MMC) is one of the most promising converter topology in medium/high-voltage applications. Reduction of capacitor voltage ripple during unbalanced grid conditions is very important for stable operation. A comparison of capacitor voltage ripple suppression methods under unbalanced conditions is presented in this paper. Three methods are explained and compared in simulation: circulating current specific sequence elimination method (CCSSE), instantaneous circulating current optimization method (ICCO), and arm current control method (ACC). The simulation model of these three methods are achieved in PLECS, the results show that the ICCO has best submodules capacitors voltage ripple reduction effect, but it will increase the peak arm current and DC line current ripple. CCSSE and ACC methods balance three phase energy in different perspectives, but the essence of these two methods are same.
KW - circulating current
KW - modular multilevel converter
KW - unbalanced fault conditions
KW - voltage ripple of submodule capacitor
UR - http://www.scopus.com/inward/record.url?scp=85060973667&partnerID=8YFLogxK
U2 - 10.1109/PEAC.2018.8590514
DO - 10.1109/PEAC.2018.8590514
M3 - Article in proceeding
AN - SCOPUS:85060973667
SN - 978-1-5386-6055-3
SP - 1
EP - 6
BT - Proceedings of the 2018 IEEE International Power Electronics and Application Conference and Exposition, PEAC 2018
PB - IEEE Press
Y2 - 4 November 2018 through 7 November 2018
ER -