Feeding catenaries sometimes induces mechanical problems because of high temperature gradients, particularly for power supply voltage of continues tensions from 750 to 3000 V, contrary to the supplies in alternative tensions used of the order of 25 000 V. One of the major reasons of these problems comes from both high temperatures reached in operating configurations and surrounding conditions. The authors of this study have developed a simple nodal method allowing to estimate the temperatures reached in the volume of the contact wires taking into account the surrounding conditions of thermal exchanges with the atmosphere, so by radiation that convection. The exchanges of the external surface of the wire with the external air are there developed in an original way by taking into account the incidence of the wind with regard to the axis of the catenaries.
Electrothermal modelling of the railroads catenaries
IET Electrical Systems in Transportation ; 2 , 3 ; 110-118
2012-12-01
9 pages
Article (Journal)
Electronic Resource
English
Current capacity of catenaries
British Library Online Contents | 1998
|Life cycle modelling of catenaries
British Library Online Contents | 1996
|Catenaries for rapid transportation
Engineering Index Backfile | 1965
|Catenaries as an indication of danger for trains
British Library Online Contents | 1993
|An approach to geometric optimisation of railway catenaries
Taylor & Francis Verlag | 2018
|