Study On Optical Detection Technology Of Ocean Wind Electromagnetic Field

With the development and utilization of marine resources in China,the acquisition of marine clean energy has attracted more and more attention,offshore wind power is one of the clean energy sources.With the gradual construction and use of offshore wind power generation.Environmental issues are gradually being paid more and more attention by people.Whether the magnetic field generated in the power transmission process of offshore wind power will have an impact on marine organisms and the environment,the distribution law of the electromagnetic field generated in the power transmission process are issues to be studied urgently.Therefore,developing an optical sensor that can be used underwater for a long time to measure and monitor the magnetic field generated by offshore wind power in real time will be of great help to the future development and utilization of the marine field.In this paper,an optical fiber sensor is developed and applied to the measurement of underwater magnetic field and the distribution of the magnetic field around the submarine cable is simulated.The main research contents of the paper are as follows.Firstly,the current domestic and international status of magnetic field detection technology in the field of offshore wind power is reviewed.The further development direction of this technology is analyzed.The research content of this paper is given.Secondly,a fiber optic magnetic field sensor is designed for monitoring the magnetic field around the ocean wind power submarine power transmission cable.Theoretically study and simulate the fiber structure of the designed fiber optic magnetic field sensor.Establish transmission equation to obtain the optimization of the fiber optic magnetic field sensor structure and parameters.Thirdly,studied the simulation analysis method of the magnetic field distribution law around the submarine power transmission cable of ocean wind power.Studied The electromagnetic field distribution law around the submarine cable based on finite element simulation,simulated the magnetic field distribution law around the submarine cable in different environments,simulated the magnetic field distribution law inside the reef.Finally,developed an underwater optical fiber magnetic field sensor based on magnetic fluid,designed and built an experimental platform for optical fiber magnetic field sensor.A large power supply was used to simulate the power transmission process of submarine cables to create a magnetic field generator to simulate the distribution environment of the ocean wind electromagnetic field.Put the developed sensors in water and air,the magnetic field sensing experiment was carried out around the cable to obtain the magnetic field sensitivity of the sensor.Further,the magnetic field sensing experiment was carried out at different positions away from the simulated cable by using the sensor,the distribution law of the magnetic field at different distances is obtained.The work of this paper will provide technical support for the future development of offshore wind power and marine ranching.