TY - JOUR
T1 - Novel multi-terminal MMC-based dc/dc converter for MVDC grid interconnection
AU - Jafarishiadeh, Seyyedmahdi
AU - Dargahi, Vahid
AU - Sadigh, Arash Khoshkbar
AU - Farasat, Mehdi
N1 - Publisher Copyright:
© 2018, The Institution of Engineering and Technology.
PY - 2018/6/19
Y1 - 2018/6/19
N2 - Multi-terminal modular multilevel converter (MMC)-based dc/dc converter with the medium-frequency ac-link transformer is an attractive and feasible solution for interconnecting medium-voltage direct-current (MVDC) grids. This study proposes a novel multi-terminal dc/dc converter which features significantly reduced number of components compared with the conventional converter topology. The proposed dc/dc converter is capable of interconnecting multiple MVDC grids with different voltage levels as well as controlling the power flow between them. A combination of sine wave modulation scheme and phase disposition level-shifted pulse-width modulation is developed and employed for voltage balancing and controlling the power flow in the proposed converter. Several simulations, experimental and real-time hardware-in-the-loop case studies are carried out to demonstrate the dynamic response and capacitor voltage balancing capability of the proposed MMC and dc/dc converter under the developed control strategy.
AB - Multi-terminal modular multilevel converter (MMC)-based dc/dc converter with the medium-frequency ac-link transformer is an attractive and feasible solution for interconnecting medium-voltage direct-current (MVDC) grids. This study proposes a novel multi-terminal dc/dc converter which features significantly reduced number of components compared with the conventional converter topology. The proposed dc/dc converter is capable of interconnecting multiple MVDC grids with different voltage levels as well as controlling the power flow between them. A combination of sine wave modulation scheme and phase disposition level-shifted pulse-width modulation is developed and employed for voltage balancing and controlling the power flow in the proposed converter. Several simulations, experimental and real-time hardware-in-the-loop case studies are carried out to demonstrate the dynamic response and capacitor voltage balancing capability of the proposed MMC and dc/dc converter under the developed control strategy.
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U2 - 10.1049/iet-pel.2017.0164
DO - 10.1049/iet-pel.2017.0164
M3 - Article
AN - SCOPUS:85048267666
SN - 1755-4535
VL - 11
SP - 1266
EP - 1276
JO - IET Power Electronics
JF - IET Power Electronics
IS - 7
ER -