Dadu River Company’s Optical Fiber Temperature Measuring Device Upgraded Empowers High-quality Development

On January 15, 2023, the Dagangshan Branch of Dadu River Company completed the upgrading and transformation of the 500 kV high-voltage cable optical fiber temperature measuring device for Dagangshan Hydropower Station. This upgrade transformed the traditional distributed optical fiber temperature measuring device to the cutting-edge ultra-weak fiber grating monitoring device, achieving centimeter level spatial resolution, fine sensing and over-temperature warning of the cable surface temperature field, and laying a solid foundation for the safe and reliable operation of 500 kV high-voltage cables.