realrailwaysectionprototypeandshouldsimulateitsfeaturesasaccurateaspossible.)Themodelshouldcalculatepowersupplysystemworkingconditionsbothinnormalandemergencymodes.)Themodelshouldgiverecommendationsonlimitationsoftrainpositioningandmovementsinemergencymode.(Ifdeemednecessary.itispossibletodecreasethenumberoftrainsonanintersubstationzoneortoincreasethetimeintervalbetweentrains)..ChoosingamodellingmethodThereareseveraldifferentmethodsforcalculatingpowersupplysystemparameters.Onebiggroupofmethodsusesaveragetrafficestimation.Calculationinthiscaseisbasedonmeanandmean-squarevaluesoftraincurrents,feedercurrents,feederwingcurrentsandsubstationcurrents(averagevaluesarecountedforeverykmzone).Thesemethodsareusedinrailwaysectionpowersupplysystemsdesignonlywhenthetrainscheduleistotallyunknown.Inthiscasetheonlydataonecanrelyonisthenumberoftrainsinadayanda应该可以记录下货物列车数量以及“沉重”列车数量。
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