Investigation of rail potential on the rails in DC Railway

초록

DC feeding system in railway is mainly floating but the rail potential and the leakage current are created because of long parallelism between rails and ground. Rail potential causes electric shock to human and leakage current causes electrolytic corrosion to nearby the buried metals. Therefore the design technologies to reduce, protect and monitor these effects are important in DC feeding system. In the report, rail potential and leakage current are analyzed based on propagation theory that is utilized in order to simulate grounding system. It is reviewed the relation of the distance between substations, rail to earth conductance and rail potential along the line while a train is moved between substations.