I have heard many people argue that we HAVE to import electricity from France. The fact is that the decision on whether to import or export electricity is purely financial. If it is cheaper to buy electricity from abroad this will happen.
First of all let us get the electricity imports into perspective.
This is based on half-hourly demand data from National Grid (http://www.nationalgrid.com/uk/Electricity/Data/Demand+Data/). I have averaged these over every day. My spreadsheet can be downloadedย here (it is rather large – over 3Mb)
The imports meet a very small part of the demand.
You will notice the weekly cycle – we tend to use less electricity at the weekends.
Anyway, let us have a closer look.
I have rescaled the demand so that it is easier to compare it with the imports. You will notice that we import more when demand is less!
Maximum imports are also over the period 24-26 December, again when the demand is at its lowest over the whole year.
Nuclear power plants are very inflexible and cannot respond to demand. Therefore, France has a problem of too much or too little electricity. Therefore, it sells its surplus electricity cheap (when demand is low) and has to rely on imports when demand is high.
No wonder the French are less keen on nuclear power than people in the UK (see here)
Leave a Reply