How to use the distributed fiber optic temperature measurement system in the power supply system? In the power supply system, cable lines carry high-voltage power transmission. Cables often suffer insulation aging due to long-term operation, and joint high temperature or even fires due to harsh external environment and long-term internal overload current. Therefore, cables must be monitored in real time. The distributed fiber optic temperature measurement system can discover faults immediately and eliminate accidents in the bud.

1. The distributed fiber optic temperature measurement system can perform online monitoring of the operating condition of power cables. It keeps track of the operating status of the entire line in real time, effectively detects cable heating under different loads, and improves cable management. It can inspect and give fire alarms in cable trenches, identify local hotspots of power cables, discover cable faults in advance and give warnings, and prevent accidents. It can protect the assets of power transmission: according to the temperature, the load change of the cable can be determined, the load can be reasonably allocated, the capacity of existing cables can be expanded, and the service life of cables can be extended. It can also detect external damage during cable operation.

2. Because of its unique advantages, the distributed fiber optic temperature measurement system is widely used in temperature monitoring of substations. It can monitor the temperature of key equipment. Generally, fiber optic cables with outer sleeves are used as the fire monitoring and alarm equipment of the main transformer room, and fiber optic cables with thermoplastic outer sleeves perform "zero-distance" real-time monitoring of the bushings of transformers, GIS wall-passing pipes and wire connection points. It can monitor the heating-prone parts inside high-voltage switchgear in real time. Used together with the ventilation system of the switchgear cabinet, the temperature inside the cabinet can be kept within the allowable range. Winding the fiber around the cable joints inside the cabinet, on the arc shields of the incoming plug-in primary contacts of the drawout circuit breaker, or on the heat-shrink sleeves of static contacts allows real-time temperature monitoring, so that measures can be taken as early as possible before an accident turns into a disaster.