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@article{Zhang:2015:10.1109/TIE.2015.2393846,
author = {Zhang, X and Green, TC},
doi = {10.1109/TIE.2015.2393846},
journal = {IEEE Transactions on Industrial Electronics},
pages = {4925--4936},
title = {The modular multilevel converter for high step-up ratio DC-DC conversion},
url = {http://dx.doi.org/10.1109/TIE.2015.2393846},
volume = {62},
year = {2015}
}
TY - JOUR
AB - High step-up ratio dc-dc converters with megawatt ratings are of interest in wind turbine interfaces and high-voltage direct-current systems. This paper presents a modular multilevel dc-dc converter based on the standard boost converter topology but with the normal single switches replaced by a number of capacitor-clamped submodules. The converter is operated in resonant mode with resonance between submodule capacitors and the arm inductor. A phase-shifted switching arrangement is applied such that there is a constant number, i.e., N, of submodules supporting the high voltage at a time. In this operation mode, the step-up ratio is dependent on the number of submodules and the inductor charging ratio. The converter exhibits scalability without using a transformer and is capable of bidirectional power flow. An application example of a wind turbine interface with a 10 : 1 conversion ratio is demonstrated in simulation. The experimental verification of the concept using a lab-scale prototype is provided.
AU - Zhang,X
AU - Green,TC
DO - 10.1109/TIE.2015.2393846
EP - 4936
PY - 2015///
SN - 0278-0046
SP - 4925
TI - The modular multilevel converter for high step-up ratio DC-DC conversion
T2 - IEEE Transactions on Industrial Electronics
UR - http://dx.doi.org/10.1109/TIE.2015.2393846
UR - https://ieeexplore.ieee.org/document/7014252
UR - http://hdl.handle.net/10044/1/26707
VL - 62
ER -