Fault Diagnosis of Power Supply Equipment Based on Distributed Fiber Grating Temperature Sensing

Abstract

Power supply system is the foundation to ensure the orderly operation of various industries, and its fault monitoring and maintenance is one of the most critical tasks. Aiming at the problems of low efficiency and poor real-time performance of manual inspection, a long-distance temperature measurement system based on distributed fiber grating is proposed in this paper. Firstly, the packaging structure of the grating sensing unit is designed to realize the decoupling of temperature-deformation spectral drift. The temperature sensitivity is 10.79pm/°C, and the repeatability is better than ±0.1°C. Secondly, an 8-channel distributed fiber grating temperature monitoring system is designed. The sensors are arranged in the switchgear and transformer of the device to realize the all-weather accurate fault monitoring of the power supply system. Since its operation, the system has been working stably and successfully warned of multiple power supply equipment failures. It provides effective technical support for the construction of smart power systems, and has broad application prospects in power supply equipment health monitoring.