ELECTROMAGNETIC COMPATIBILITY BETWEEN ELECTRIC TRACTION SYSTEM AND SIGNALLING AND TELECOMMUNICATIONS AT THE SWEDISH RAILWAYS
When 16 2/3 Hz electric traction systems were developed in the twenties, comprehensive research was undertaken concerning the interference produced in telecommunication circuits. To solve the problem, modifications were made to both the traction system and the telecommunication lines. With the introduction in 1967 of thyristor controlled locomotives and motor coaches, extensive investigations were made of disturbances in signaling and telecommunication circuits. During 1971-1972, a prototype static frequency converter for transforming utility-supplied three-phase 50 Hz power to single-phase 16 2/3 Hz power was tested to investigate harmonic disturbances and to determine ways of reducing the disturbance. Finally, techniques have been developed for reducing interference of railway telecommunication and signaling circuits resulting from exposure to induction and earth potentials from power lines and plants.
- Presented at the IEEE International Electromagn Compat Symp Rec, New York, N.Y.
Institute of Electrical and Electronics Engineers (IEEE)3 Park Avenue, 17th Floor
New York, NY United States 10016-5997
- Svensson, S
- Publication Date: 0
- TRT Terms: Communications; Electric power conditioning; Interference; Propulsion; Railroad electrification; Signaling; Technology; Thyristors; Vehicle power plants
- Geographic Terms: Sweden
- Old TRIS Terms: Propulsion controls; Thyristor control
- Subject Areas: Railroads; Vehicles and Equipment;
- Accession Number: 00056791
- Record Type: Publication
- Source Agency: Engineering Index
- Files: TRIS
- Created Date: Jul 22 1976 12:00AM