The electric sparks and arcs occurred at the contact of a pantograph and an overhead contact wire is the emission source of electromagnetic interference in electric railways. It has been noticed by the train operators that CRH2 EMU train has denser electric sparks more frequently than other EMUs when lifting its pantograph. The electromagnetic transients in the high voltage circuit may produce overvoltage and disturb the onboard electronic equipment, as well as emit high frequency electromagnetic interference. Some measurements of the charging transients when CRH2 EMU lift the pantograph were conducted in the depot. Using PSCAD/EMTDC, a simulation circuit that includes external power source, the pantograph and the high voltage cable on the car roof is established. The simulations to analyze that how the circuit element parameters can affect the electromagnetic transients are given. The calculated results are compared with the measured data to validate the simulation model. One solution is put forward to improve CRH2 charging transient performance.
Measurement and Simulation of the Electromagnetic Transients of Lifting Pantograph for an Electric Multiple Units Train
2014
10 Seiten
Conference paper
English
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