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2. Assessing energy requirements
2.1 Rolling load characteristics
The electrical charge generated by trains is not a constant charge, as the talk of "standard operation" would have us believe. In fact, the current curve (figure 2 ) picked up by a moving train is characterized by a succession of inrushes and outrushes of current on the contact line (starting and braking), spaced out by periods of low load (load on vehicle auxiliaries) corresponding to stops and runs over the track. Electrical energy consumption results mainly from :
energy dissipated in the brakes (significant in the absence of recuperation);
resistance to forward motion (air resistance,...
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Bibliography
Standards and norms
- Railway applications – Traction network supply voltages - EN 50163 -
- Railway applications – Electric drive – Part 1: Protective measures relating to electrical safety and earthing - EN 50122-1 -
- Railway applications – Electric drive – Part 2: Protective measures against the effects of stray currents from DC electric traction - EN 50122-2 -
- Protection contre la corrosion due aux courants vagabonds...
Regulations
Technical decree of May 17, 2001 (modified by decree of May 10, 2006) laying down the technical conditions to be met by electrical energy distribution. Title 3 – Electric traction. OJ of June 12, 2001.
Arrêté du 17 mars 2003 relatif aux prescriptions techniques de conception et de fonctionnement pour le raccordement au réseau public de distribution d'une installation de consommation d'énergie électrique....
Software tools
MARCADET: Modélisation Appliquée aux Réseaux Continus d'Alimentation et Distribution de l'Énergie Traction (RATP software).
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