Customized Guideline for Designing Overhead Contact System for Ethiopian Railway: Case Study of Indode Station
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Date
2014-08
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Addis Ababa University
Abstract
This thesis presents Overhead Contact Line System design for Indode station. Overhead Contact
System (OCS) is an essential interface between fixed installation and moving energy consumer
for electric railway. Its design depends on mechanical, electrical and environmental loads.
Therefore proper design and standard of overhead contact line system for a particular
environment according to specific service requirement is necessary. In this work detailed
technical design of overhead contact system for Indode station as reference to review other
overhead contact line system design in Ethiopia Railway is done.
In this thesis first overhead contact system for electrified root is modeled based on bottom to top
approach. Trolley and simple catenary of both semi and auto compensated Overhead Contact
System is modeled. Traction impendence of overhead contact system especially double track of
simple catenary equivalent impendence is determined. Then based on this model and
meteorological data, maximum span length, critical span length, maximum sag height, and
maximum anchoring length are derived and determined. From this determined parameter and site
plan of Indode station, Overhead contact system plan is prepared according to planning rules and
standard using Microsoft Visio. Finally main thesis work is summarized by preparing overhead
contact system design manual for Ethiopia Railway.
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Keywords
OCS, trolley and simple catenary OCS, maximum span length, critical span length, maximum anchoring length, maximum sag height, traction impendence, OCS plan, Microsoft Visio