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Overview
Submarine cables are specially designed for underwater environments to transmit electrical energy. It is extensively utilized for power transmission between land and islands, among islands, offshore wind power, marine scientific research, and other related fields. Submarine cables require superior resistance to interference and corrosion, which requires a variety of anti-corrosion and waterproof materials. These materials are more demanding in technical and performance requirements. Based on submarine cables with typical voltage classes, YOFC has independently developed a number of innovative technologies to realize overall innovation in cost, performance, and other aspects of these cables.
Innovation Pioneer: Leading Industry Development
YOFC has pioneered the development of super cross-linking technology, reducing the insulation eccentricity of submarine cables to 3% or less, significantly below the industry standard of 8%. We also introduced a micron-level insulation impurity selection technology, effectively removing impurities during the cable insulation manufacturing process, thereby greatly enhancing the electrical reliability during cable operation.
As the pioneer in China to develop a jointless capacity-expanding submarine cable that incorporates armored copper wire and steel wire welded flexible conversion, YOFC addresses scenarios where current-carrying capacity is limited in certain sections of cable laying. This innovation meets current-carrying requirements while avoiding the expansion of the overall cross-sectional area. This approach achieves high current-carrying capacity and low cost for submarine cables. In comparison to conventional cables with identical specifications, the present carrying capacity has been enhanced by 15%, resulting in a 10% reduction in cost.
The real-time optical fibre monitoring technology pioneered in the industry ensures the stability and reliability of fibre, which enables the delivery capacity of a whole submarine cable to exceed 45 kilometers. This position positions it among the top in China.
YOFC's copper-aluminum conductor flexible transition submarine cable technology can achieve cost savings of 15%–20% at voltages above 220kV, with advantages amplifying as the cable length increases, indicating a vast market horizon.
Green and Eco-friendly: Helping Achieve Carbon Peaking
The utilization of semi-wet submarine cables comprising copper wire, copper strip, and aluminum-plastic composite tape in lieu of lead sheath can effectively ensure cost reduction and efficiency enhancement in the construction of offshore wind power projects. Compared with traditional submarine cables, semi-wet ones have a weight reduction of about 38% and a manufacturing cost reduction of about 10%, which is more conducive to the protection of the marine environment. Currently, semi-wet submarine cables have successfully passed the type test and been certified by the China National Centre of Testing and Inspection for Electric Cable and Wire (KEMA).
YOFC has also independently developed large-section and long-distance HVDC submarine cables, thereby reducing production cycles and paving the way for the future advancement of offshore wind power.
