Stray Current Modelling Relative to Magnetic Field in Electrified Railway System
The thesis entitled "Stray Current Modelling in the Electrified Railway System" has been thoroughly studied, where Manila's LRTA-Line2 rail system utilizes a 1,500 VDC overhead contact line traction power system to provide power the rolling stock. With the rapid development of urban rail transit, the stray current have many adverse effects on the underground environment. Based on the basic principle of disruption of the current urban distribution of rail transit, this paper explains and describes the mechanism of the stray current distribution. This will provides essential information focus on the four (4) railway disciplines which have significant involvement on stray current analysis, generations and maximum potential in reference to particular transportation service conditions. Aside from stray current analysis, the limitations of these models with the actual conditions such as non-uniform track-to-earth resistances and magnetic field along the rails are discussed. With respect to systems in the nearby environment, it was expected that there will be no issues with magnetic field sensitive equipment in the medical institutes that were observed nearby the alignment. Nevertheless, it was recommended to perform a DC magnetic field simulation study to further strengthen the expectation of no issues relatively to stray current. The simulations to support that expectation is presented in this report and will be able to be able understand in terms of safety, reliability and efficiency of railway operations and provides significant contributions on the development of the railway industry in the Philippines.
Keywords - Corrosion; Current Leakage; Electric Traction; Magnetic Field; Rail Bond; Transit System