Abstract:

The timedomain mathematical prediction model of a space frequency magnetic field of UHV AC transmission line was established, which simplified the tedious process of the model in the complex domain. The horizontal distribution of the power frequency magnetic field of UHV AC transmission line in our country wasanalyzed basedon the prediction model, so that the maximum intensity of magnetic induction would be well shielded. In order to control the power frequency magnetic field, the sizeof the line load current, the height of wire from the ground, the conductor configurationofsingleloop and the phase sequence arrangement  of the double loop were studied in the fixed quantity. The results provided a more intuitionistic reference and learning for  engineering designers.

Key words: AC; UHV transmission lines; power frequency magnetic field