Monitoring analysis and protective measures of power frequency electromagnetic field in transmission line

In order to study the electromagnetic radiation from high-voltage power transmission line,this paper introduces the monitoring process of the 110 kV and 220 kV single and doublecircuit transmission lines in Heilongjiang and analyzes the monitoring results,which show that the electric fields intensity and magnetic intensity of high-voltage power transmission line decreases when the distance between the center conductor andthe ground increases.On the basis of the result,this paper proposes protective measures in accordance with the influential factors of power frequency electromagnetic field to treat pollution of electromagnetic radiation from transmission line.