Browsing by Author "Solomon, Gossa"

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    Analysis of Third Rail Technology for 750 V DC Power Feeder Light Railway Transportation: Case Study of AALRT
    (Addis Ababa University, 2016-06) Solomon, Gossa; Abebe, Demissie (Mr.) Co-Advisor
    This thesis analyzes two different transportation electrification DC traction power feeder structures, i.e., an embedded wireless power transfer system and an overhead catenary wire system. The efficiency, feasibility, and benefits of the two systems are considered. Addis Ababa LRT was started OCS, but they have problems like: bad environmental visualization, wind effect on catenary, wind effect on the catenary cable and alignment problem of Track with respect to Catenary cable .Those problems are solved based on third rail DC traction power feeder relatively run at safely, durable, harmonic effect reduce and environmental attractiveness. The method of solved the problems based on data analyzed and design of third rail power sequence. This situation needs an effective alternative traction power feeder for train control and protection system power sequence apply and working safely. A rail track switching system has been designed to control railway track controlling devices including railway switches and signals within a given area from a single point. Such control is exercised through the use of various track circuits which detect the presence of trains on a particular segment track and monitor the train’s safety. Normal modeling approaches for power electronics and train usage were developed in MATLAB/Simulink to compare the two systems, each at two power levels 0 VDC and 750 VDC were chosen to demonstrate the differences between power levels depend on the relay energized or not in the power box controller. Component efficiencies, energy transfer levels, from power cable to contact rails for the various models were determined. The process has not been completed but key results from the analysis and lessons learned from this process will be discussed in this Thesis.