The ultrahigh voltage (±210kV) XLPE insulation DC submarine cable (two DC terminals and one factory joint included) and DC power cable (two DC terminals and one factory joint included) get the type test report from “China national centre for quality supervision and test of electric wire and cable”, the product is researched and produced by ZTT independently.
The factory joint and site flexible joint are completed by Zhongtian Technology Submarine Co.,Ltd. in the test system. The DC power cable(Factory joint included) is the highlight, which passes through the type test. It has been the only one in domestic until now.
The ultrahigh voltage (±210kV) XLPE insulation DC submarine cable and DC power cable is one of the important equipments in flexible HVDC power transmission project. It’s used to transmit the electricity for high-power and long distance, aperiodic wind power generation and also as the connection of new energy such as tidal power exchange between systems. It’s electricity performance is good and applicable to run in the high temperature. There is no oil leak and aging phenomenon happened. It has less influence to the environment. DC submarine cable has the advantages of lower price, less loss, long distance transmission, more stability of the system, less short-circuit current, etc. compared to the high voltage AC submarine cable. Cross section is 1000mm2 and the maximum transmission power of both poles can reach 500MVA for the ±210kV DC submarine cable.
