With the continuous miniaturization, electrical, high-speed and intelligent of railway signal equipment, the control switch module must have higher safety, reliability and anti-interference ability. Under this background, this paper studied the railway signal distributed computer control switch module. First of all, this paper introduced the main supporting technology of distributed interlockin...

Studies on the modeling and simulation of the railway vehicle traction system play an active role in the operation and planning phase of railway electrification. In this paper, the longitudinal dynamic of a light rail vehicle was modelled and simulated in Matlab-Simulink. The traction system consists of two parallel motor groups, each of which is composed of two seperately-excited motors connec...

Electric arcing is an unavoidable consequence of the current collection process by sliding contact in railways and metros, general many electrified transportation systems (ETSs). The most relevant consequences electrical perspective are: occurrence transients triggering resonant behaviour transient responses, reduction energy efficiency system, conducted radiated disturbance, particular for new...

Induction motor structures in DC electrified railways with their dynamic performance are studied. Characteristics of the current, voltage, electrical and mechanical torque and active and reactive power in accelerating, normal and regenerative braking are investigated. The characteristics of the induction motors used for Tabriz urban railway are simulated with PSCAD/EMTDC software proving the in...

Jacqueline Llanos, Raúl Morales, Alfredo Núñez, Doris Sáez, Matías Lacalle, Luis 3 Gabriel Marín, Roberto Hernández, and Fernando Lanas 4 1 Electrical Engineering Department, University of Chile, Santiago, Chile 5 2 Section of Railway Engineering, Delft University of Technology, Delft, the Netherlands 6 3 Energy Center, Faculty of Physical and Mathematical Sciences, University of Chile, Santiag...

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Transports on rail are increasing and major railway infrastructure investments are expected. An important part of this infrastructure is the railway power supply system. The future railway power demands are naturally not known for certain. This means investment planning for an uncertain future. The more remote the uncertain future, the greater the amount of scenarios that have to be considered....

The recordings of the pantograph voltage and current waveforms across Italian and French high speed railway lines (both Autotransformer 2x25 kV 50 Hz systems) are analyzed to estimate some Power Quality indexes: harmonic spectra, harmonic distortion, displacement factor and fundamental component, in various rolling stock operating conditions. These indexes, that define the electrical interface ...

Construction projects become complicated and fragmented so that many specialty contractors are involved. In such changed environments, a general contractor’s overhead costs are increasing comparable to direct costs. In addition to an increase of volume, activities consisting of overhead costs play an important role in coordinating different participants who include different specialty contracto...