TY - JOUR
T1 - Controlled transition full-bridge hybrid multilevel converter with chain-links of full-bridge cells
AU - Li, Peng
AU - Adam, Grain Philip
AU - Holliday, Derrick
AU - Williams, Barry
N1 - This paper is a post-print of a paper submitted to and accepted for publication in IEEE Transactions on Power Electronics and is subject to Institution of Electrical and Electronic Engineering Copyright. The copy of record is available at IEEE Explorer Digital Library
PY - 2017/1/1
Y1 - 2017/1/1
N2 - This paper proposes a controlled transition full-bridge (CTFB) hybrid multilevel converter (HMC) for medium and high voltage applications. It employs a full-bridge cell chain-link (FB-CL) between the two legs in each phase to generate multilevel bipolar output voltage. The CTFB-HMC has twice dc voltage utilization or power density of conventional converters due to the bipolar capability of its full-bridge configuration. Hence, for the same power rating and same voltage level number, its total cells per phase are quarter that in modular multilevel converter (MMC), which reduces the hardware installation volume. Also, in the proposed converter, the total device number in the conduction paths is the same as in the half-bridge MMC, leading to low conduction losses. The FB-CL current of the CTFB converter has no dc component, which offers the potential to enhance the transient response. Comparative studies between the CTFB and other multilevel topologies are carried out to clarify its main features. The modulation strategies and parameter sizing of the proposed converter are investigated using a generic case. Simulation and experimental results are used to verify the effectiveness of the proposed approach.
AB - This paper proposes a controlled transition full-bridge (CTFB) hybrid multilevel converter (HMC) for medium and high voltage applications. It employs a full-bridge cell chain-link (FB-CL) between the two legs in each phase to generate multilevel bipolar output voltage. The CTFB-HMC has twice dc voltage utilization or power density of conventional converters due to the bipolar capability of its full-bridge configuration. Hence, for the same power rating and same voltage level number, its total cells per phase are quarter that in modular multilevel converter (MMC), which reduces the hardware installation volume. Also, in the proposed converter, the total device number in the conduction paths is the same as in the half-bridge MMC, leading to low conduction losses. The FB-CL current of the CTFB converter has no dc component, which offers the potential to enhance the transient response. Comparative studies between the CTFB and other multilevel topologies are carried out to clarify its main features. The modulation strategies and parameter sizing of the proposed converter are investigated using a generic case. Simulation and experimental results are used to verify the effectiveness of the proposed approach.
KW - hybrid multilevel converter
KW - full-bridge cell chain link
KW - controlled transition process
KW - improved DC voltage utilization
KW - low conduction losses
KW - zero DC chain-link current
U2 - 10.1109/TPEL.2016.2523598
DO - 10.1109/TPEL.2016.2523598
M3 - Article
VL - 32
SP - 23
EP - 38
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
SN - 0885-8993
IS - 1
ER -