Browsing by Author "Beyene, Aynabeba"

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    Customized Guideline for Designing Overhead Contact System for Ethiopian Railway: Case Study of Indode Station
    (Addis Ababa University, 2014-08) Beyene, Aynabeba; Kumneger, Hussien (Mr.)
    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.