Theory and experimental research of a Y-phase-modulator based optical fiber current sensor

Chaoyang Zhang; Chenghao Wang; Shuo Chen

doi:10.1117/12.904776

1 December 2011 Theory and experimental research of a Y-phase-modulator based optical fiber current sensor

Chaoyang Zhang, Chenghao Wang, Shuo Chen

Author Affiliations +

Proceedings Volume 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 81990Z (2011) https://doi.org/10.1117/12.904776
Event: International Conference on Optical Instruments and Technology (OIT2011), 2011, Beijing, Beijing, China

Abstract

A highly accurate Y-phase-modulater based fiber optic current sensor (FOCS) for alternating and direct currents up to 100kA was investigated. Reciprocal optical circuit and weak signal processing method based on related modulation and demodulation of this sensor were analysed. Models of the optical path system and signal processed circuit system were studied separately. And based on these models, the key temperature error sources and corresponding compensation measures were discussed. Furthermore, A 500kV engineering prototype and its performance test devices were designed, and type test of it was finished at Xi'an high voltage apparatus research institute co., LTD(XIHARI) by the end of 2010. According to the test results, the sensor achieved accuracy to within ±0.2% at -40 to 80°C with inherent temperature compensation, resolving power for small AC current was less than 0.5A, angle difference was less than ±2', and the overall performance exceeded the IEC60044-8 standard class 0.2S (±0.2%). Applications of the sensor are in high-voltage substations, in chemical chlor-alkali, and in the electrolytic production of metals such as aluminium.

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Chaoyang Zhang, Chenghao Wang, and Shuo Chen "Theory and experimental research of a Y-phase-modulator based optical fiber current sensor", Proc. SPIE 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 81990Z (1 December 2011); https://doi.org/10.1117/12.904776

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