Power cables for ships and offshore oil platforms

Abstract

The invention discloses a ship and offshore oil platform power cable. The power cable is characterized in that the power cable comprises main wire core(s), a wrapping belt, an inner sheath, an armor layer and an outer sheath; the number of the main wire core(s) is one or three; each main wire core is provided with a conductor, a conductor shielding layer, an insulating layer, an insulated non-metal shielding layer and an insulated metal shielding layer from inside to outside in the respective radial direction successively; the conductor is coated with the conductor shielding layer, the insulating layer and the insulated non-metal shielding layer through extrusion; the insulated metal shielding layer wraps the insulated non-metal shielding layer; when the number of the main wire core(s) is three, three filling strips are further comprised; the wrapping belt warps the main wire cores and the filling strips which are stranded together; and when the number of the main wire core(s) is one, the wrapping belt directly wraps the main wire core, the wrapping coverage rate is in the range from 20% to 50%; the periphery of the wrapping belt is provided with the inner sheath through extrusion; the armor layer is located outside the inner sheath; and the armor layer is coated with the outer sheath.

Description

[0001] The invention relates to a power cable for ships and offshore oil platforms. Background technique [0002] In recent years, with the development of submarine photoelectric composite cables, the electricity used by offshore oil platforms can be transmitted from land through submarine optical cables, and then transferred to the platform through power cables for ship electrical equipment, and then supplied to various system applications through transformer conversion. It solves the shortcomings of large energy consumption, high noise, and large space used in the past caused by generator sets for power generation. However, at present, the voltage level of the submarine photoelectric composite cable commonly used in my country is 35kV, so it is necessary to connect the ship electrical equipment that matches this voltage level with a power cable. At present, the international power cable standard for marine electrical equipment adopts the IEC60092-354 standard. The highest vo...

AI Technical Summary

Problems solved by technology

At present, the international power cable standard for ship electrical equipment adopts the IEC60092-354 standard. The highest voltage level of this standard is 18 / 30kV. At present, there is no voltage level of 26 / 35kV in the world. The electrical equipment of ships with matching grades is connected by power cables, so the major shipyards can only choose 26 / 35kV power cables for land systems instead, and the power cables for land systems of this voltage level use cross-linked Polyethylene insulation, cross-linked polyethylene material will form water branches under the action of electric field to discharge when water is immersed, the insulation layer is easy to break down, the reliability is poor, the life is short, it needs to be replaced frequently, and the maintenance cost is too high

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