Cable fault location method using fiber optic distributed temperature sensor

摘要

One of the possible fault location methods is to sense the temperature rise following a ground fault, using a fiber optic distributed temperature sensor, application of this method to the cable was verified, through sensing the temperature rise at a ground-fault test, using a power optical composite cable. Next, application of this method to the joint was studied through sensing the temperature rise at a ground4ault test, using a thermocouple as a temperature sensor with test joints. An optical composite joint was experimentally prepared for a ground-fault test. The temperature rise at an incidence of a fault was determined and anticipated performance was demonstrated in a ground-fault test. Furthermore, the practical location system for multiple line was developed. This paper describes the application of this method to joints and the practical location system for multiple actual line.