Onshore Simulation Test Setup for Temperature and Strain Sensing of Submarine Cable based on BOTDA

摘要

The 500kV submarine cable route of Hainan Networking System starts from Nanling Village, Jiaowei Township, Xuwen County, Zhanjiang City, Guangdong Province. It crosses the Qiongzhou Strait to Linshi Village, Qiaotou Town, Chengmai County, Hainan Province. Hainan Networking System 500kV AC Submarine Cable is the first ultra-high voltage, large capacity and long-distance cross-sea networking power cable in China. It is 31 km. In this article, there are three main parts. The first part introduces the status of submarine cable monitoring and the BOTDA test principle. The second part is to design a calibration experiment to calibrate the Brillouin temperature coefficient and the Brillouin strain coefficient for the test fiber of the submarine cable. The third part is to design the spatial distribution rate verification experiment of Brillouin optical time domain reflectometry analyzer to ensure the error of equipment and experiment, so that it can be applied in submarine cable in the future.