Conference paper
Learning Based Capacitor Voltage Ripple Reduction of Modular Multilevel Converters under Unbalanced Grid Conditions with Different Power Factors
A fast and non-parameter-dependent grid-current-control method to ride through dangerous unbalanced gird condition is proposed in this paper. The grid-current references are calculated from an artificial intelligence (AI) surrogate model in order to keep the capacitor voltage at a safe level under a two phases short circuit to ground condition.
And also, the circulating current reference are determined when the power factor is different when the grid fault is not serious. This machine learning network represents the relation between grid-current references and submodule capacitor voltages. The results show that this method prevents capacitor-overvoltage trips under completely short-circuited grid.
Language: | English |
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Publisher: | IEEE |
Year: | 2020 |
Pages: | 531-535 |
Proceedings: | 2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems |
ISBN: | 1728169895 , 1728169909 , 1728169917 , 9781728169897 , 9781728169903 and 9781728169910 |
ISSN: | 23295767 and 23295759 |
Types: | Conference paper |
DOI: | 10.1109/PEDG48541.2020.9244470 |
ORCIDs: | Dragicevic, Tomislav |
Grid current control Modular Multilevel Converters Submodule capacitor voltage, machine learning
Capacitors Circuit faults Current control Multilevel converters Power electronics Reactive power Voltage control artificial intelligence surrogate model capacitor voltage ripple reduction capacitor-overvoltage trips circulating current reference dangerous unbalanced gird condition electric current control grid current control grid fault grid-current references ground condition learning (artificial intelligence) machine learning machine learning network modular multilevel converters overvoltage protection phases short circuit power capacitors power factor power factors power grids short-circuited grid submodule capacitor voltage submodule capacitor voltages unbalanced grid conditions voltage control voltage-source convertors