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.