Extrapolation of measured values of power-frequency magnetic fields in the vicinity of power links

Summary

In the past two decades some national regulations have required measurements of power-frequency magnetic field, either to check compliance with a “measurable exposure limit” or to inform the public on their “real” or “expected maximum” magnetic field exposure. When there is a practical impossibility of making the measurements in the nationally established “reference loading condition”, engineers are confronted with the need to extrapolate the measured values, obtained in the measurement programme, to the ones that would be produced by the applicable reference limiting condition. This Technical Brochure gives an overview of the main characteristics of the magnetic field produced by power links and of the national regulations concerning both short-term and long-term exposure to magnetic fields; and it aims at providing to practicing engineers a general framework where they can identify their case, and also, at providing information on the most important effects that may affect it and recommendations on the requirements of the necessary measurement procedures, in order to allow an effective extrapolation of the measured values.

Additional informations

Authors

LIU

Keywords

power system, technical performance