Analysis on the Electromagnetic Environment under Double-circuit in Substation

In this paper,the electromagnetic environment for the surrounding of the double-circuit line of a 750 kV substation is studied.Based on the double-circuit overhead transmission line model,the influences of the distance of phase conductors,numbers and spacing of the split conductors,the diameter of the sub-conductor,and the conductor to ground height,on the electric intensity of conductor surface,the radio interference(RI),and the audible noise(AN)are analyzed.Measures to improve the electromagnetic environment are proposed as well.