Test and Evaluation of Power Frequency Electromagnetic Field in High Voltage Substation

There is a public debate that is the power frequency electromagnetic field exceeds a certain limit may be a potential hazard to the human health. As the substation is the most concentrated place of the substation primary equipment and secondary equipment in a power system, and the electromagnetic environment become worse with the voltage level improving. In this paper, the industrial-frequency electromagnetic field of two 500kV high voltage substation corridors have been tested, and their distribution have been made, too. An experiment has been done on the effect of the high-voltage substation shielding; some advice about the shielding measures was given as well.