In recent years

developing wind power resources by offshore floating wind power platform has gradually become one of the important directions of energy development. As the connecting device between wind turbine and static submarine cable

dynamic submarine cable is the key equipment of offshore energy transmission system. During the operation period

the dynamic submarine cable is often affected by such multiple failure factors as electricthermal-mechanical fatigue

which puts forward higher requirements for the properties of key materials of dynamic submarine cable

with the properties of insulation material in particular. In this paper

a kind of ultra-pure homopolymer water tree retardant cross-linked polyethylene material is studied. Based on the possible failure factors of dynamic submarine cable

the mechanical

electrical and temperature resistance properties are tested to verify its applicability to dynamic submarine cable.