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What is Neutral Section

Chapter 19
Handbook of Research on Emerging Innovations in Rail Transportation Engineering
In some occasions, electrical substations connected to different phases feed two adjacent electrical sections. In such cases, the electrical sections cannot be connected and a section that is not electrically supplied separates them. This dead zone is called neutral section. Depending on the kind of trains and their current collector systems, these neutral sections can have different lengths and they must be placed in a location where the train can go drifting (not in traction or braking mode). A safety system must be able to feed the neutral section in case a train is stuck in it.
Published in Chapter:
Steady State Modeling of Electric Railway Power Supply Systems for Planning and Operation Purposes
Pablo Arboleya (University of Oviedo, Spain)
Copyright: © 2016 |Pages: 37
DOI: 10.4018/978-1-5225-0084-1.ch019
Abstract
This chapter describes the different electric railway power supply systems and their main characteristics from the point of view of the power flow modeling and simulation. It considers the DC traction systems and also the AC ones, explaining the different elements embedded in the network and proposing steady state electrical models of each element. The basic methods for modeling the train behavior in terms of demanded/regenerated power are also detailed. Finally, the procedures to simulate the trains motion into the electrical network and how their motion and power demand affect to the electrical variables will be unraveled, explaining how to merge all the models in a system of equations.
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