July 1, 2017 Thesis Open Access

Kassu Bekele

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    <subfield code="a">Assessment and Mitigation of Voltage Drops on Traction Lines: Case Study of Sebeta-Adama Line</subfield>
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    <subfield code="a">&lt;p&gt;The transmission line in an electrified railway system must provide power transmission within&lt;br&gt;
the voltage limit at safe and quality conditions. Therefore, system analysis within the traction&lt;br&gt;
power system is vital to the design and operation of an electrified railway. Loads in traction&lt;br&gt;
power system are often characterized by their mobility, wide range of power variations,&lt;br&gt;
regeneration and service dependence. One of the main problems in the railway supply stations&lt;br&gt;
are the voltage drops due to the changes of the load. Voltage drop in electrified railway have an&lt;br&gt;
influence on the location of traction substation (reduces distance between traction transformer&lt;br&gt;
and section post length) and operating railway transport in a such condition disturbs&lt;br&gt;
transportation system, as a result the reactive power compensator should be installed to have a&lt;br&gt;
better voltage at receiving end.&lt;br&gt;
Ethiopian railway cooperation is constructing national railway transport from Sebeta to Meiso&lt;br&gt;
with seven feeding traction substation from Sebeta to Adama. In this thesis traction network&lt;br&gt;
voltage drop analysis is undertaken for various feeding condition. Taking sample section from&lt;br&gt;
Sebeta substation to Indode substation analyses of the traction network voltage drop over the&lt;br&gt;
feeding condition has been conducted for different loading cases. The modeling and simulation&lt;br&gt;
of the system is done by MATLAB/SIMULINK software&lt;/p&gt;</subfield>
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