Mutual interaction of AC and DC traction systems and design integrated earthing system

Abstract

Electrical traction is more effective, more comfortable, and more cost-effective than diesel traction in railway systems. Since trains are a popular form of public transportation in Sri Lanka, having an effective and dependable electrified railway transit system will boost the service's capacity and draw more customers every day. This study is based on the integration of AC and DC traction systems while fed from the same grid substation. The simulation model has been developed for the entire system by ETAP software and analysed the system with different scenarios and different conditions. The proposed railway electrification projects in Sri Lanka are considered for the Final results were gathered with the behaviour of the system according to the model. Finally, the DC traction substation earth grid is designed considering the results of the analysis. This simulation model can be used with some modifications for the actual design purposes and can mitigate the issues that arise after installation.