Petrol stations have various strict requirements regarding their electrical installations for obvious reasons. How will adding a MW size supply for a few high power chargers be dealt with, separation? Will earth leakage currents be a problem? If I remember correctly the reason the canopys are so high is to move the lighting into a different zone.
There is no reason that earth leakage should be more of a problem than anywhere else, but EMC problems may become quite significant, A lot of the assumptions about widely spaced sources and radiated energy from each car not aggregating will not really apply if you put a lot of charging points in one place.
The EV 'petrol station' is another problem entirely....
Given the totally different use situation - a 3 minute of filling with 2 mins of paying and get out as fast as possible for petrol, versus park up for at least ten times that and wander about or have a meal, by the time service stations are serving anything but a small fraction of the current petrol car throughput as electric cars, there will not be enough room, unless perhaps the cars are stacked vertically.
The 8000 petrol stations can serve 30 million cars and about 10 million commercial vehicles with 16 billion litres of petrol and 20 billion litres of diesel per year, cars filling up perhaps once or twice a week and HGVs daily. ( PRA Dukes )
If we need forty thousand charge points for the current 0.5 million electric cars (of which 0.25 million are half pure electric and a similar no of hybrids with plug in capability ) then I suspect for electricity a more thinly spread network with more nodes spaced wider apart will be required.
Is that reasonable ? if we expand in the next decade or so to say 20 million electric cars, how many charge-point killowatt hours per day do we need to keep them rolling at a comparable rate.? Then there is the freight sector to add in.
I have also often wondered if it would be better to re-invent motorail and keep cars on the move while charging them from the 25kV train overheads. (I appreciate the available power is limited, and the voltage spec of 19kv to 27kv is rather bouncier than the normal mains).
In any case fear the railways, that have taken more than 150 years to electrify about half way round the UK, would simply not catch up in any reasonable time.
Not sure how we'd wire the vertical car park either. presumably at 11 or 33kV except for the last 100m or so.
There is no reason that earth leakage should be more of a problem than anywhere else, but EMC problems may become quite significant, A lot of the assumptions about widely spaced sources and radiated energy from each car not aggregating will not really apply if you put a lot of charging points in one place.
The EV 'petrol station' is another problem entirely....
Given the totally different use situation - a 3 minute of filling with 2 mins of paying and get out as fast as possible for petrol, versus park up for at least ten times that and wander about or have a meal, by the time service stations are serving anything but a small fraction of the current petrol car throughput as electric cars, there will not be enough room, unless perhaps the cars are stacked vertically.
The 8000 petrol stations can serve 30 million cars and about 10 million commercial vehicles with 16 billion litres of petrol and 20 billion litres of diesel per year, cars filling up perhaps once or twice a week and HGVs daily. ( PRA Dukes )
If we need forty thousand charge points for the current 0.5 million electric cars (of which 0.25 million are half pure electric and a similar no of hybrids with plug in capability ) then I suspect for electricity a more thinly spread network with more nodes spaced wider apart will be required.
Is that reasonable ? if we expand in the next decade or so to say 20 million electric cars, how many charge-point killowatt hours per day do we need to keep them rolling at a comparable rate.? Then there is the freight sector to add in.
I have also often wondered if it would be better to re-invent motorail and keep cars on the move while charging them from the 25kV train overheads. (I appreciate the available power is limited, and the voltage spec of 19kv to 27kv is rather bouncier than the normal mains).
In any case fear the railways, that have taken more than 150 years to electrify about half way round the UK, would simply not catch up in any reasonable time.
Not sure how we'd wire the vertical car park either. presumably at 11 or 33kV except for the last 100m or so.
