Imperial College London
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DrYunjieGu

Faculty of Engineering, Department of Electrical and Electronic Engineering

Lecturer in Power Systems
 
 
 
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Contact

 

yunjie.gu Website

 
 
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Location

 

1119Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Green:2021:10.1109/TPEL.2020.3045618,
author = {Green, T and Xiang, X and Gu, Y and yang, Q and Zhang, X and Li, W and He, X},
doi = {10.1109/TPEL.2020.3045618},
journal = {IEEE Transactions on Power Electronics},
pages = {7625--7640},
title = {Resonant modular multilevel DC-DC converters for both high and low step-ratio connections in MVDC distribution systems},
url = {http://dx.doi.org/10.1109/TPEL.2020.3045618},
volume = {36},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - DC transformers based on power electronics are keyitems of equipment for medium voltage dc (MVDC) distributionsystems. Both high and low step-ratio dc-dc conversions arerequired to interface dc links at different voltages to form anintegrated dc distribution system. The transformer-coupledresonant modular multilevel dc-dc converter (RMMC) is wellsuited to high step-ratio connection between a MVDC network anda low voltage dc (LVDC) network but it is not suitable in low stepratio conversion for linking two MVDC networks with similar butnot identical voltages. This paper presents a circuit evolution of thehigh step-ratio transformer-coupled RMMC into its low step-ratiotransformer-less RMMC counterpart. These two RMMCsshare thesame structure and the same resonant process within the resonantSM stack (RSS) giving rise to the same operational advantages. Also,the circuit design experience can be readily transferred from one tothe other. From these two base RMMC circuits, a family of RMMCswith further configurations is elaborated that provide a wider varietyof connection optionsfor MVDC distribution systems. In this circuitfamily, each high step-ratio transformer-coupled RMMC has a lowstep-ratio transformer-less RMMC counterpart and one can betransformed into the other via the circuit evolution processpresented. The theoretical analysis for both high and low stepratio RMMCs has been verified through full-scale simulations ofmedium voltage examples and further verified through downscaled experiments on laboratory prototypes.
AU  - Green,T
AU  - Xiang,X
AU  - Gu,Y
AU  - yang,Q
AU  - Zhang,X
AU  - Li,W
AU  - He,X
DO  - 10.1109/TPEL.2020.3045618
EP  - 7640
PY  - 2021///
SN  - 0885-8993
SP  - 7625
TI  - Resonant modular multilevel DC-DC converters for both high and low step-ratio connections in MVDC distribution systems
T2  - IEEE Transactions on Power Electronics
UR  - http://dx.doi.org/10.1109/TPEL.2020.3045618
UR  - https://ieeexplore.ieee.org/document/9296809
UR  - http://hdl.handle.net/10044/1/85056
VL  - 36
ER  -
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