Evaluation of electromagnetic interference from railway electric power system harmonics

This work shows an evaluation methodology for the occurrence of electromagnetic interference in signaling and control equipment of a DC electrified railway under contingency conditions in which the traction rectifying unit works with 6 pulses instead of the 12 pulses of its normal operation. Thus, electromagnetic interference can result from the direct interaction of the magnetic fields close to the rails as well as the resultant induction in the cables that interconnect the signaling and control equipment.