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{Xiang:2021:10.1109/TPEL.2020.3001431,
author = {Xiang, X and Gu, Y and Chen, K and Astolfi, A and Green, T},
doi = {10.1109/TPEL.2020.3001431},
journal = {IEEE Transactions on Power Electronics},
pages = {34--40},
title = {On the dynamics of inherent balancing of modular multilevel DC-AC-DC converters},
url = {http://dx.doi.org/10.1109/TPEL.2020.3001431},
volume = {36},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Modular multilevel dc–ac–dc converters (MMDACs) serve as an enabler for dc distribution systems. The modular multilevel structure enables flexible voltage transforms, but raises issues over balancing of the submodule (SM) capacitor voltages. This letter focuses on the dynamics of inherent balancing of MMDACs under circulant modulation. We provide an invariance-like result using a variant of Barbalat's Lemma and prove that the SM capacitor voltages converge to the kernel of the circulant switching matrix, which is the intersection of the invariant sets for each switching state. We further interpret the balancing dynamics as a permuted linear time-invariant system and prove that the envelop of the balancing trajectories is governed by the eigenvalues of the permuted state-transition matrix. This result extends previous full-rank criterion for inherent balancing in a steady state and provides new insight into the dynamic behavior of MMDACs.
AU  - Xiang,X
AU  - Gu,Y
AU  - Chen,K
AU  - Astolfi,A
AU  - Green,T
DO  - 10.1109/TPEL.2020.3001431
EP  - 40
PY  - 2021///
SN  - 0885-8993
SP  - 34
TI  - On the dynamics of inherent balancing of modular multilevel DC-AC-DC converters
T2  - IEEE Transactions on Power Electronics
UR  - http://dx.doi.org/10.1109/TPEL.2020.3001431
UR  - http://hdl.handle.net/10044/1/80827
VL  - 36
ER  -
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