Earthing and bonding of 25-0-25 kV autotransformer traction power system in a high capacity underground railway system

Crossrail has adopted a 25-0-25 kV AT traction power system for the Central Section, to provide power for the high frequency train services, where each train is rated at 5.5 MW and each train carries around 1500 passengers. There are traction and non-traction systems running in parallel inside the tunnel...