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Barcelona is turning subway trains into power stations
  • If they are like the trollies I briefly got to get some insight into (got to poke around in the CAD model for a bit and talk to some of the engineers working on it) they might have a small battery pack to carry them over intermitten gaps in grid power delivery. Kind of like a hybrid car battery.

  • Barcelona is turning subway trains into power stations
  • Could the regeneration be putting out a higher current than what the batteries on the subway train can handle? Not very likely, but I guess that's a possibility.

    Or if the trains are running on an electrified rail and don't actually carry much battery capacity themselves so regenerative braking fills that small battery and then dumps the rest back to the grid?

    I don't particularly feel that either of those situations are likely to be accurate, but I guess someone could have done something weird in the design.

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    SteevyT @beehaw.org
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