A new approach to cable fault location using fiber optic technology. I

This paper reports a method for instantaneous fault location on a resistance grounded system of underground power cables. Based on a grounding test to measure the temperature distribution near a fault point with thermocouples, the authors propose a new fault location method that integrates a fiber optic distributed temperature sensor (FODT sensor) into the cable. A grounding test on an optical fiber composite power cable and a joint verified that the new method is of acceptable accuracy and reliability.>