Research of the key issues of ±535kV HVDC extruded cable development

Ningbo Orient has developed and qualified 320kV HVDC extruded cable systems for submarine applications and 535kV HVDC extruded cable systems for underground application. And a lot of research has been done in 535kV submarine cable, especially in key stone conductor design, insulation thickness design, mechanical design, qualification test and other key issues which need to be study.