Locomotive

Résumé

thumb|upright=1.2|Locomotive à vapeur Pacific 231 G. thumb|upright=1.2|Locomotive Diesel Série 59 (Belgique). thumb|upright=1.2|Locomotive électrique CC 6500. Une locomotive est un véhicule ferroviaire qui fournit l'énergie motrice d'un train. L'adjectif substantivé est originaire du latin loco - « venant d'un lieu », ablatif de « locus », lieu - et du latin médiéval motivus, « qui provoque le mouvement ». Les machines à vapeur loco-motrices ont remplacé les machines à vapeur stationnaires chargées de faire remonter les trains de wagons de marchandises ou de voitures de voyageurs sur les plans inclinés des premières voies ferrées. Celles-ci complétaient la traction hippomobile sur les parties des voies sans déclivité, d'abord dans puis hors des mines, tandis que certains trains avançaient par gravité par exemple pour descendre le charbon des sorties des mines vers les canaux. Une locomotive n'a pas de charge utile en elle-même, sa principale fonction étant de tracter un train et éven

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https://fr.wikipedia.org/wiki/Locomotive

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The Locomotive Assignment Problem (LAP) is a class of planning and scheduling problems solved by assigning a fleet of locomotives to a network of trains. In the planning versions of the LAP, the type of consist (a group of linked locomotives) assigned to each train in a given schedule is determined. We introduce an optimization model (called consists selection) that precedes the planning LAP solution and determines the set of consist types. This selection leads to solutions that are characterized by potential savings in terms of overall fueling cost and are easier to handle in the routing phase. © 2015 Elsevier Ltd.

Elsevier2015

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This problem corresponds to refueling locomotives at different station yards during the course of its journey. Locomotive tanks have a fixed fuel capacity and prices of fuel vary across yards. In addition, there is a fixed cost for hiring a refueling truck at a yard and every refueling stop that the locomotive makes. Locomotives can power different train sets during a cyclical planning horizon running 14 days. The objective of this exercise is to minimize the total fuel costs fixed and operational for a given set of locomotives, trains and yards. In addition, there are numerous constraints relating to refueling, locomotive tank capacity, refueling truck capacity etc. This problem has similarity to the network flow problem. We formulate this problem as a Mixed Integer Program (MIP) and present our experience in the following sections.

2010

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This paper presents a study on the power conditioning features of hybrid powertrain, especially regarding diesel-electric locomotives. Equipped with an embarked energy buffer for diesel generator support and utility grid interface, such a locomotive can be considered as a plug-in series hybrid vehicle. The driveline inductive components, like generator and motor windings, and capacitive components like dc link capacitors can be used to provide STATCOM functions, and the energy buffer can be used for short-term grid support. The co-action of power electronics circuitries and diesel generator gives a possibility to observe the locomotive as a mobile versatile power plant for special rolling stock and emergency supply. With high power levels ranging from few hundred kilowatts to several megawatts, the locomotives can participate in large-scale power conditioning at standstill, bringing revenues to the operators even “off-line”.

2012

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