That's good to hear.
Great news. So they are on -site at Braybrooke, design stage for Ratcliffe-on-Soar/Kegworth area and as I understand it that leaves just one more in the Chesterfield area.
I'm hoping the clearance was provided at Nottingham when it was re-modelled in 2013. The south end of Leicester was also re-modelled recently, and from photos showing a bit of room above a train I think it might not be too bad. If I'm wrong, then they ought to be candidates for insulation and surge arrestors, as in Cardiff.
The remodelling at Leicester a few years ago was to get 40mph starts out of platforms 2 and 3. No track lowering or bridge raising happened, and the station building overbridge is a likely candidate for some well insulated interventions as there's no space above or below, from all reports. Another remodelling is due in conjunction with Wigston-Syston grade separation, which might mean that the area is one of the last places to be electrified.
I got the impression the grade separation plan had been dropped. Wasn't there a recent report on additional tracks in the area that said nothing about any possible grade separation?
If true, substitue "grade separation" for "capacity enhancement". Something needs to be done, regardless of the solution.
I believe that is correct, as detailed timetable modelling indicated it wasn't necessary. We'll just have to see...
Ahhrr OK thanks for that clarification.
Only the most recent ones on the ECML have the static frequency converters that balance the load off all three Grid phases. I think they only used them because the Grid in the areas concerned couldn't tolerate that amount of phase imbalance from a traditional 25kV feeder, but looking at the number of power lines round Ratcliffe I expect that problem wouldn't arise here.
That would be a static frequency converter (SFC), but it's not needed here. The 400kV supply point at Ratcliffe power station can handle thousands of megawatts, so the relatively small load for the railway won't matter if the phases are unbalanced.
Google 'Leicester Area Strategic Advice' and the NR pdf will outline the (public) thinking about how capacity challenges would be solved.
True but the railway supply point was not the power station but a 400 kV OHL between Ratcliffe village and Kegworth. HS2 were planning their substation immediately South of the A453 /Parkway/Kegworth Road junction, so there's potentially a synergy if the HS2 one is still needed
That synergy would include the ability to supply the different lines from different phases, e.g. HS2 eastern stub could take one phase, the MML southbound another and the lines to Nottingham/Derby the third, (or any such split that might provide a reasonably balanced load to the grid connection).
It's still near enough to the multiple lines serving the power station site that the connecting link could be reinforced if necessary. I believe there are traditional feeder stations supplied by a single passing Grid line.
Checking on NGCs 2020 published Fault Level Data Table from ETYS2020, the Fault level, and so effectively source impedance at Ratcliffe 400kV is very high - actually the highest in England (50kA RMS break current, about 35GVA) so likely not need SFC, though prob will depend on background harmonic situation. No doubt they will do studies as usual.
Polyurea paint (à la Cardiff Intersection Bridge) would be more likely IMHO.
The Kings Cross remodelling advance works included lowering of a sewer, under all the tracks between the station and the tunnels. I’d expect if it can be done there Leicester shouldn’t be that difficult a problem.
Does the sewer need replacing or lowering? Camden Sewer was a replacement of an existing asset (at a lower invert level AIUI) with the track at the same level as it was before (again, AIUI). I'm not sure if the same situation applies to Leicester.
The reports earlier this year explained the new track position after remodelling was lower than before, to get rid of a hump between platform ends and tunnels. I’m sure there are pictures in the relevant thread showing the difference when they were part way through the job. Academic point though, if as BaldRick has said it’s different at Leicester.
Yes. Applied using plural component spray equipment- very fast drying, very tough and very insulating against both water and electricity.
Looks good Phil! Re "Compound 3", the best way to view that is to reach the footbridge accessed by the bridleway off Newton Rd (located here: 52.45647246838276, -0.8696769892839173 https://goo.gl/maps/1i7ioF1qRkvhWvHCA)
I would imagine this is a construction staging site for steelwork, fittings and wire rather than permanent infrastructure.
