In which case there would be some days without any trains...
Actually it would be interesting to know what the power consumption of an electrified railway line is, in comparison with the power generation capability of a wind farm.
A quick googling round gives...
1) a Network Rail document called "Consultation on Traction Electricity Consumption Rates for Train Operating Companies August 2008"
at
this very long address
where they list consumption rates in kilowatt-hours per train-mile.
Sample default consumption rates:
319 4-car 12.75; 8-car 24.47
377 4-car 14.27; 8-car 27.41
or perhaps call it
20 kWh per train mile for a back of the envelope calculation.
2) Siemens produces turbines ranging from
2.3 to 6.0 MW.
3) The London Array wind farm is rated at
630 MW peak.
I'll leave it to a proper engineer to do some more calculations...