The power line is the core asset of the power grid, including equipment and facilities such as insulators, fittings, towers and power lines. It is widely distributed in plains and mountains, exposed to natural environments such as wind, snow, rain and dew. It is also damaged by natural disasters such as floods and landslides, and the operating environment is quite harsh. Power lines have the characteristics of large dispersion, long distance, difficult to patrol and maintenance. Therefore, online monitoring of the power line and surrounding environment has become an urgent task.

Power line equipment management is an important part of power enterprise. The qualities of maintenance management have a great impact on the health of the line, the running performance and the reliability of the power supply. The condition maintenance of power line is an advanced maintenance management method, which can effectively overcome the problems of over-repair or disrepair of equipment caused by regular maintenance, greatly improve the reliability of power supply, and bring huge economic benefits to the power system and society.

Distributed optical fiber sensor is the most ideal real-time monitoring technology for high-voltage power lines. The distributed optical fiber sensing system (BOTDA) can monitor the temperature of the long-distance line surface in real time, calculate the allowable load and current load of the conductor temperature, and provide a comprehensive and effective solution for fault monitoring and load management to ensure the safety, improve asset utilization, identify potential failures and maintenance.