Offshore wind plant submarine cable monitoring and protecting system and method

Abstract

The invention discloses an offshore wind plant submarine cable monitoring and protecting system and method, and the method comprises the following steps: carrying out the real-time monitoring of the temperature, strain and disturbance state of a submarine cable, obtaining the ship information through a ship automatic recognition system, and arranging an electronic fence outside the submarine cable, giving an alarm to the ship entering the electronic fence according to the ship navigational speed in the ship information; predicting the trajectory direction of the ship according to data acquired by a ship automatic identification system, tracking the ship through a radar, carrying out view screen shooting on the ship, expelling the ship, and carrying out positioning analysis on a submarine cable fault point. According to the invention, comprehensive monitoring and protection of the submarine cable, which integrates submarine cable state monitoring, AIS ship information monitoring and radar scanning, trajectory prediction and video storage, are realized, so that the operation safety of the submarine cable is guaranteed. And the submarine cable can be conveniently protected from the operation state of the submarine cable, ship hazard early warning and the like.

Description

technical field [0001] The invention belongs to the technical field of submarine cable monitoring and protection, in particular to a system and method for monitoring and protecting submarine cables of offshore wind farms. Background technique [0002] Submarine cables continue to improve in terms of voltage level and insulation technology, and online monitoring of high-voltage photoelectric composite submarine cables is the trend of future development. Japanese scholar Toshio Nishimoto et al. used optical time domain reflectometer (ΦOTDR) to monitor the external damage of 20km66 kV XLPE submarine cable online. Japanese scholars Hirohumi Tayama and Toshiaka Hara respectively used distributed optical fiber Raman temperature sensor (Raman optical time domain reflectometer, ROT-DR) to monitor the temperature of 6.6kV and 500kV XLPE submarine cables. The domestic research on cable online monitoring technology is carried out later, and it is mainly for land cables, and there are ...

AI Technical Summary

Problems solved by technology

Although the above research has significantly promoted the progress of submarine cable monitoring technology, it still cannot meet the actual requirements of real-time online monitoring of submarine cables.

RΦOTDR technology can only measure the temperature distribution along the submarine cable, and the measurement distance is short; ΦOTDR technology can only detect after the submarine cable has been damaged and broken by the violation event, and cannot realize real-time online monitoring and early warning of violation events

In 2009, Jiang Qi, Yang Lipeng and others proposed to apply Brillouin optical time domain reflectometer (ΦOTDR) technology to submarine cable monitoring, and set up a three-core high-voltage submarine cable in the laboratory. The cable model was established, and its effectiveness was initially verified, but the three-phase single-core high-voltage submarine cable was not studied, and the submarine cable was not tested in the real submarine environment, and the submarine cable online monitoring system based on ΦOTDR was not implemented.

[0003] In summary, the ΦOTDR and RΦOTDR technologies used in the current research on submarine cable online monitoring technology can no longer meet the needs of real-time online monitoring of submarine cables, cannot accurately monitor and diagnose submarine cables, and cannot accurately identify faults in submarine cables

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