Analysis of Third Rail Technology for 750 V DC Power Feeder Light Railway Transportation: Case Study of AALRT
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Date
2016-06
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Addis Ababa University
Abstract
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.
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Keywords
Third rail, DC power supply, harmonics, traction power system, shoe, OCS