Cross-linked polyethylene insulated power cable for smart energy in shallow seas and lakes and manufacturing method thereof

Abstract

The present invention discloses a cross-linked polyethylene insulated power cable for smart energy in shallow seas and lakes and a manufacturing method thereof. The cable successively comprises a cable core, a semiconductive buffer water-blocking tape, a metal protective layer, an isolation layer, a metal wire armor layer and an outer protective layer from inside to outside. The cable core comprises at least one insulated wire core. Each insulated wire core successively comprises a water-blocking conductor, a semiconductive conductor shielding layer, a crosslinked polyethylene insulation layer and a semiconductive insulation shielding layer from inside to outside. A metal shielding layer is arranged outside the insulated wire core. The water-blocking conductor is composed of twisted metal filaments and water-blocking yarns that longitudinally cover the outside of the filaments, wherein gaps among the filaments and the yarns are filled with water-blocking powders. According to the technical scheme of the invention, the power transmission capability in the near-distance underwater continuous manner is realized, and the requirements of water prevention, corrosion prevention and large sea water flushing tension can be met. Meanwhile, the power cable replaces a conventional sub-sea cable of a complex structure and simplifies the the cable manufacturing process. Moreover, the production efficiency is improved and the unnecessary cost waste is avoided.

Description

technical field [0001] The invention relates to a cross-linked polyethylene insulated shallow sea lake power cable for smart energy and a manufacturing method thereof. Background technique [0002] my country is a large oceanic country with a sea area of ​​more than 3 million square kilometers and a coastline of 18,000 kilometers. There are more than 6,000 islands along the coast. There are rich submarine oil fields and natural gas in the shallow sea continental shelf. The coast is also an economically developed area in my country. The development of coastal islands urgently needs electricity. Due to the high cost and long period of construction of power stations, coupled with the difficulty of fuel supply and other factors, power supply and communication (especially military confidential communication) for small and medium-sized islands need to be solved through submarine cables. [0003] With the development of offshore wind power in shallow seas and the rise of tourism in ...

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Problems solved by technology

In these specific occasions, the distance between various facilities is as far as 3-5km, and the short distance is between tens and hundreds of meters. It is not appropriate to use the traditional long-length submarine cable connection method to transmit power and communication. At the same time, in coastal tidal flat areas, ordinary cables are difficult to meet the requirements of waterproof, anti-corrosion and high tension of seawater erosion, so the market urgently needs a new type of light special cable for shallow sea lakes

[0004] At present, submarine cables of 35kV and below are mainly made of phase-separated extruded lead alloy sheath, which is characterized in that the longitudinal water resistance of the phase-separated cable core conductor is combined with the radial water formation of the extruded lead alloy sheath, but the lead sheath is a Heavy pollution sources, serious environmental problems

Therefore, for the special occasion of shallow sea and lake, it is not suitable to adopt the lead sheath structure of the original submarine cable

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