1) The development of medium and high voltage polypropylene insulated power cables is promoting batch application. 

2) The submarine cable manufacturing level is synchronized with the international. Developed a large length (three core) ultra-high voltage submarine cable, the length of significantly increased, the highest voltage level increased to 500kV. The extrusion capacity of large-length insulation of high-voltage cables has been significantly improved, reaching more than 150 tons continuously. The factory joint development and manufacturing capacity continues to improve, AC voltage level up to 500kV, DC voltage level up to ±400kV. 

3) Middle and high voltage dynamic submarine cable to achieve demonstration application, voltage level up to 35kV, and to 66kV development. 

4) Ultra-high voltage AC cable accessories to achieve localization, 500kV domestic cable accessories batch application. ±400kV and below HVDC cable accessories to achieve domestic and engineering applications. 

5) Development of 66kV torsion-resistant power cable for offshore wind turbines. Wind power plays an important role in the energy transition, among which the offshore wind turbine 66kV torsion resistant power cable plays an important role in the wind turbine system. The cable is installed in the tower barrel and engine room of the wind turbine and connects the transformer at the top of the turbine to the switchgear at the bottom of the tower. In the tower, the cable free hanging length is about 48m, and the entire cable length is about 110m.

6) Shanghai 35kV kilometer high temperature superconducting cable High temperature superconducting cable has the advantages of low loss, large capacity and so on. At present, from scientific research results to high temperature superconducting cable production line, test center and related facilities, has been in Shanghai Baosteel alloy steel branch to achieve the industrial application of high temperature superconducting cable, and built an unmanned remote control substation, high temperature superconducting cable after 3 years of use, the operation effect is good; In addition, a demonstration project of a kilometer-level high temperature superconducting cable has been completed in the Caohejing Development Zone in the center of Shanghai, and the capacity has been successfully tested, and it has been safely operated for more than 1,000 days. The schematic diagram of low-temperature insulated three-phase turnkey superconducting cable is shown in Figure 3. The type test requirements and adiabatic performance requirements of 35kV high temperature superconducting cable are shown in Table 1, where U is the rated voltage of the cable.