Evaluation of the Electric and Magnetic Fields near Overhead Transmission Lines and Substations

초록

In this paper, measurements and analyses of ELF electric and magnetic fields in the vicinity of UHV overhead transmission lines and substations have been conducted. Planar-type electric field sensor and multiturn loop-type magnetic field sensor have been developed as three dimensionally with special consederation of taking lower frequncy and spatial components without any distortion. The actual survey in and around 345/154kV power substations and under 154[kV] overhead transmission lines was carried out and analyzed. It is known from these results that the electric field intensity exceeds slightly 3.5[kV/m] under 154[kV] overhead transmission lines. And the maximum magnetic field intensity under a typocal overhead transmission line do not exceed 20[uT], and it meets sufficiently all limits or guidelines of the various athorized international institutesrecommendations.