Research and design of DC500kV optical fiber composite submarine cable

According to the project capacity requirement, the selection of system operating voltage level, the type of insulation material and the highest operation temperature of cable, simulation analysis by the current capacity capacity finite element software, then get the conductor DC resistance requirements, combined with the need of project laying environment, get the design of the appropriate conductor and structure and size finally. Reference to the maximum electric field strength of the insulating material, design of the appropriate insulation layer thickness, make the insulation wire core Laplace field strength to meet the insulation requirements, at the same time to ensure the insulation temperature between inside and outside less than 20 °C at least. The material selection and thickness determination of the other process, must follow the rules of environmental requirements, international and domestic standards, the thickness is calculated by assuming diameter algorithm, and to meet the customers' needs add the optical fibers in the right location of the submarine cable, get the design of DC500kV large conductor section optical fiber composite DC submarine cable finally.