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Abstract: Temperature measurement is very important for the state monitoring and safe operation of High Temperature Superconducting (HTS) cables. Distributed optical fiber can be used to measure the temperature along power cable because of the advantages of anti-electromagnetic interference, high voltage resistance and convenient fixing, etc. In this paper, the feasibility of distributed optical fiber used for temperature measurement of HTS cables was studied. A temperature rise test of liquid nitrogen temperature to room temperature was designed to check the temperature measurement accuracy of the optical fiber. In local thermal disturbance experiment and the critical current experiment, optical fiber was used to measure the dynamic distribution of temperature along a HTS cable. Temperature measurement results of optical fiber installed at different positions in HTS cable are analyzed, and the best installed position was determined by comparing different temperature measurement effects.
Keywords: Distributed optical fiber, temperature measurement, HTS cable, feasibility
