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EV Charging Article in E&T Lack of Joined Up Thinking

Roger B

Quite an interesting article in E&T:

How a lack of joined-up thinking could block EV charging expansion | E&T Magazine (theiet.org)

I thought that UK substation fuses were more that 200 - 300A (800A??).

Is the unbalanced phase problem realistic?

Does the 'car to grid' feeding in to the cable and potentially causing an unmonitored overload also apply with other local generation such as solar PV? 

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  • Roger B said:

    Is the unbalanced phase problem realistic?

    Does the 'car to grid' feeding in to the cable and potentially causing an unmonitored overload also apply with other local generation such as solar PV? 

    Potentially, if one phase is relatively heavily loaded with little generation, the second phase has little load and no generation, and the third phase is lightly loaded with export exceeding the loading, this will increase the supply Neutral current to a value above the largest line current.

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  • Roger B said:

    Is the unbalanced phase problem realistic?

    Does the 'car to grid' feeding in to the cable and potentially causing an unmonitored overload also apply with other local generation such as solar PV? 

    Potentially, if one phase is relatively heavily loaded with little generation, the second phase has little load and no generation, and the third phase is lightly loaded with export exceeding the loading, this will increase the supply Neutral current to a value above the largest line current.

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