Collaborative control of common-mode voltage suppression and neutral-point potential balance based on carrier modulation for non-isolation V2G system

DOI

10.2991/eesed-16.2017.13How to use a DOI?

Keywords

Non-isolation V2G, Carrier modulation, Common-mode voltage suppression, Neutral-point potential balance, Collaborative control.

Abstract

For problems that there is common-mode voltage in non-isolation three-phase three-level V2G integration system, the common-mode equivalent model was established. Meanwhile, it revealed that DC link neutral-point potential imbalance would limit the effect of common-mode voltage suppression. The analysis revealed that in-phase disposition modulation would lead to larger fluctuations in the common-mode voltage, although the neutral-point potential is balanced by injecting zero-sequence voltage, it has no effect on the suppression of common-mode voltage; The opposite phase disposition modulation could reduce common-mode voltage peak value, but zero-sequence voltage injection is not suitable for which to balance neutral-point potential. Furthermore, we propose a new modulation strategy of bipolar carrier modulation combined with the virtual space vector modulation (NTV2), keeping the output of common-mode voltage be constant; meanwhile, we imported NTV2 to redefine the virtual medium vector to keep neutral-point potential balance in full range. Thereby the new modulation strategy achieved the collaborative control of the elimination of common-mode current and neutral-point potential balance. Finally, we took the respective simulation research to the new modulation strategy. The simulation results demonstrated the effectiveness of collaborative control strategy.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xiang-Wu Yan
AU  - Zhi-Heng Xiao
AU  - Jia-Le Zhao
PY  - 2016/08
DA  - 2016/08
TI  - Collaborative control of common-mode voltage suppression and neutral-point potential balance based on carrier modulation for non-isolation V2G system
BT  - 2nd Annual International Conference on Energy, Environmental & Sustainable Ecosystem Development (EESED 2016)
PB  - Atlantis Press
SP  - 89
EP  - 97
SN  - 2352-5401
UR  - https://doi.org/10.2991/eesed-16.2017.13
DO  - 10.2991/eesed-16.2017.13
ID  - Yan2016/08
ER  -