01-02-2024, 04:59 PM
Thanks for reply's... Been searching around & it seems they nowadays have substations that use two way converter gubbins with GTO thyristors & insulated gate bipolar transistors in them instead of straight rectifiers. Also read some substations in the old days would have a bank of resistors for braking trains to dump their regenerated power into. Remember going on a train in Spain that had what looked like an electric fire on the roof, presume that was for regen braking...
