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DC for Ev stations

lyledunn

I note some interest in developing DC charging infrastructure where the DC ultra-fast chargers have multiple spaces instead of the usual two. It appears that car parks can be completely populated with units fed from the DC output of the central source and then load managed as appropriate. This will mean substantial DC fixed wiring. 
dhttps://youtu.be/SX7FrWDGhUk

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    A related problem is the transformer losses - in some cases this favours what looks like an inefficient solution, of 2 transformers stepping down from HV either the same size or one large one small, so that one can be totally disconnected when load is low. Other even odder ideas, like battery banks at the charging hubs to smooth the load over 24 hours or longer are also a serious consideration.

    It is a new and strange problem, and the best right answers are very much work in progress.

    Mike.

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  • 0

    A related problem is the transformer losses - in some cases this favours what looks like an inefficient solution, of 2 transformers stepping down from HV either the same size or one large one small, so that one can be totally disconnected when load is low. Other even odder ideas, like battery banks at the charging hubs to smooth the load over 24 hours or longer are also a serious consideration.

    It is a new and strange problem, and the best right answers are very much work in progress.

    Mike.

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