A Study on Fault Detecting for Underground Power Transmission Lines using Optical Field Sensors

광응용 자계센서를 이용한 지중송전선 사고구간 검출에 관한 연구

Recently, for improving the power supply reliability and for rationslizing maintenance, new maintenance and monitoring systems are stornagly desired for use in the field of electric power transmission. In this paper, we describes the optical fault detecting method of underground power transmission lines using bareearth doped YIG Faraday sensors which are very light, small size and fast response. As regarding, we use the zero phase current detecting algorithm at insulated joints.