Application of the distributed optical fiber grating temperature sensing technology in high-voltage cable

As an artery of steel, metallurgy, power industry, cable is throughout the whole plant, and its importance is self-evident. The temperature of cable is very important and it reflects the cable running. The paper has designed a system monitoring the cable temperature for the timely and accurate understanding of the cable operating conditions. It is based on the principle of distributed Fiber Bragg Grating (FBG) sensing. It has optimized the sensor design and studied detection accuracy on the impact of the slightly curved cable. The sensor should not be affected by the electromagnetic radiation interference and light power fluctuation. Distributed measurement could be composed of sensors. This system may monitor the cable temperature on line and response to the realtime operation of cable accurately. The accuracy of the system is ±1°C.