CALCULATION AND MEASUREMENT OF ELECTROMAGNETIC INFLUENCE ON TELECOMMUNICATION CABLES IN SUBWAY SYSTEMS BY POWER ELECTRONIC CIRCUITS

For the subway in Vienna/Austria electrical drives for air flow control are considered whose speed is controlled by power electronic circuits. The electric power line feeding the power electric circuits is mounted in parallel with the subway telecommunication cables over a length of close to six-hundred meters. The current pulses -- caused by the power electronic control -- in the electric power line lead to induced voltages in the telecommunication cables. This paper provides a derivation of equations to calculate the induced voltages. A Fourier analysis of the current in the electrical power lines is performed. The difficult problem of calculating the induced voltages in the telecommunication cables is solved by the conform mapping. The real geometric configuration concerning magnetic field calculation. In this configuration, by different mathematical operations, the induced voltages can be calculated. Good comparison is found between calculation and measurement of induced (EMI) voltages.

Media Info

  • Features: References;
  • Pagination: p. 19-24

Subject/Index Terms

Filing Info

  • Accession Number: 00182796
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: n 77CH1224-5EMC Proceeding
  • Files: TRIS
  • Created Date: Oct 31 1981 12:00AM