Decreasing the Rail Potential of High-Speed Railways Using Ground Wires

For high-speed railways, the rail potential, i.e., electrical potential difference between and ground, can be considerably higher than that of conventional speed electric railways become a safety risk to signaling devices along line, because large train currents high rail–ground leakage resistance. Proper countermeasures must taken decrease safe level. This paper first provides brief theoretical discussion principles how arises suppress it. Then, program, TRANAS, was developed for traction network analysis is used calculate effects various suppression an AT feeding system, which include cross-bonding tracks, inserting CPWs, grounding using catenary masts, laying bare buried ground wires connecting dedicated grids, are evaluated based on calculation results. The use shows good prospects solving problems in integrated way, investigated detail. fact GWs attributed resistance return circuit, meaning relatively small cross-section will enough them.