Study on Selection Method of Analogy Line in High Voltage Transmission Project Environmental Impact Assessment

This article integrate the theoretical calculation of the power-frequency electromagnetic field intensity and radio interference intensity under transmission line, and analyze the factor which influence the value and distribution of the electromagnetic field, radio interference under transmission line, aiming to provide basis and reference for other environmental assessment of electromagnetism. The study shows that a reasonable selection of analog lines can get an accurate result as the theoretical calculation. Important factors of analog lines selection including: grade of voltage, current, height of line, location order of line, number of circuit, section area of line, number of bundle conductors.