CPC H02J 9/062 (2013.01) [H02J 3/388 (2020.01); H02M 1/40 (2013.01)] | 14 Claims |
1. An apparatus for flux management in an impedance isolation single conversion (ZISC) based uninterruptible power supply (UPS) system, the apparatus comprising:
a first determining unit configured to determine a first offset flux on a series reactor in the ZISC based UPS system when power quality events occur in a grid connected to the ZISC based UPS system and the ZISC based UPS system operates in a grid-connected mode;
a first resetting unit configured to provide synthetic impedance damping to the series reactor to reset the first offset flux;
a second determining unit configured to determine a second offset flux on a transformer in the ZISC based UPS system when the ZISC based UPS system operates in the grid-connected mode or an island mode; and
a second resetting unit configured to reset the second offset flux in response to a magnitude of the second offset flux exceeding a flux magnitude limit.
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