Re:Cooling the tube – Engineering heat out of the Underground
by F_r_k on Saturday June 24, 2017 @08:18AM
(#14625338)
That's not true.
1) modern railway is fully IGBT powered. In this case it is trivial to inject current.
2) with DC current you need a substation capable of converting AC to DC (easy: bridge rectifier) but also DC to AC (to given tolerances) which is much more cumbersome.
1) modern railway is fully IGBT powered. In this case it is trivial to inject current.
2) with DC current you need a substation capable of converting AC to DC (easy: bridge rectifier) but also DC to AC (to given tolerances) which is much more cumbersome.