Français
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,...
The Ultimate Scientific and Technical Reference
This article is included in
Electricity networks and applications
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Assessing energy requirements
Feeding system design
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).
The Ultimate Scientific and Technical Reference
