Products >   Marine System >   Submarine cable(HVDC)
A Leading Global Manufacturer of Cable Systems

HVDC Submarine Cable

HVDC links are mainly used for the transmission of large amounts of power over a long distance with low losses, especially for offshore generation sites that are far from shore (>70km). HVDC submarine cables are typically single-core cables with extruded insulation and metallic radial water barrier.

ZTT has the capability of manufacturing the HVDC submarine cables with an annual capacity of 1000km and had made a series of great achievements in Chinese market, including 160kV and 200kV projects for Nan Ao and Zhoushan islands. In 2019, ZTT was awarded a 400kV HVDC interconnector in Rudong county, Jiangsu province with a transmission capacity of 800 MW for offshore wind farm development.

VIEW BROCHRE

Design & Construction


System voltage:

 30kV≤U≤500kV

Conductor:

 Circular stranded copper conductor constructed of round or profiled wires.  

 Max. CSA 3000sq.mm

Insulation:

 Cross-linked polyethylene (XLPE)

Metallic Screen/Sheath:

 Lead alloy sheath

Armor:

 Galvanized steel wire

Armor bedding & serving:

 Polypropylene yarns


20161122163805_9109.png

Reference Standards

CIGRE recommendations: CIGRE 496, CIGRE 623.

Types & Purposes

  • For offshore wind farm

    -Export cable to transport the total generated power from offshore substation to onshore substation

  • For interconnection

    -Interconnecting grids of countries

    -Power supply from mainland to isolated islands

Advantages

ZTT has the capability to manufacture long continuous length HVDC submarine cables without factory splices as it is equipped with the state-of-the-art VCV lines, vertical assembly lines with big carousels and enough outdoor storage carousels for completed cables. Moreover, the wharf is 80 meters from the storage carousels, which can minimize the risk during cable load out.

20160624160048_2423.png

Representative Projects

Product Catalogues

HVDC Submarine Cable