Assessment on stray current for third rail system performance in DC railway operation

Mustamin, Mhd Avid (2021) Assessment on stray current for third rail system performance in DC railway operation. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This project focuses on the DC electrification train system available in Malaysia and abroad. The problem of stray current or known as leakage current is always present and occurs in the performance of the Third rail system in DC operation. This project focuses on the evaluation of stray currents by modeling simple circuit earthing systems on railway systems. In evaluating the stray current on the DC electrification train system, this project uses Stray Current Monitoring System (SCMS) software used by the Malaysia's third railway system to obtain data to implement the effectiveness in assessing this problem and analyze the level of stray current, when the train moves away from the initial state. using the DC mode running rail insulation method. To reduce the problem of stray current the effectiveness of earthing systems was also evaluated in this project and comparisons were made between earthing systems. For the simulated modelling simple circuit earthing system, this project used Matlab/Simulink software. The result of this project is to obtain relevant data in the framework of the Performance of the Third Rail System in the DC Railway Operations system that is, the result of the data in assessment of the stray current when implementing the earthing scheme by taking the value of ICollector(A), ILine(A), IEarth(A) and INeutral(A) to show the appropriate earthing scheme usedinthe Malaysia’s third rail system, and from this project show the Reverse diode earthing scheme is more effective in Malaysian third rail system. As hardware testing is not possible, this project focuses on data analysis performed by Matlab/simulink software as well as data obtained from Malaysia's third railway system to analyze stray current on DC electrification train system.

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