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A Study on Optical Current Sensor and Voltage Sensor for automation of power distribution  

양승국 (한국해양대학교 전자통신공학과)
오상기 (한국전기연구원 정보.광연구그룹)
박해수 (한국전기연구원 정보.광연구그룹)
김인수 (한국전기연구원 정보.광연구그룹)
김요희 (한국전기연구원 정보.광연구그룹)
홍창희 (한국해양대학교 전자통신공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.6, no.1, 2002 , pp. 89-98 More about this Journal
Abstract
Optical current sensor and optical voltage sensor modules were designed and fabricated to improve measurement error and insulation in automatic power distributor By using Faraday effect, optical current sensor with an $\alpha$-iron core was designed and fabricated to minimize current induction of the other phase and was optimized to maintain linearity. Optical voltage sensor was fabricated owing to the pockets effect and adopted spatial electric field type because of small room in an automatic power distributor. To connect a distributor with an external terminal for signal processing, optical multi connector was designed, fabricated and tested for coupling loss and gas leakage. The linearity of optical current sensor for applied current maintains variation of smaller than 2.5% for applied current range from 20A to 700A. The linearity of optical voltage sensor was smaller than 1% for appling voltage from 6.6kV to 19.8kV. Since the measured characteristics are good, these devices can be considered as being applicable in practice.
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