Production method of alternating-current and direct-current hybrid submarine cable for offshore wind power

Abstract

The invention discloses a production method of an alternating-current and direct-current hybrid submarine cable for offshore wind power. The production method comprises the following specific steps of1, preparing a water-blocking conductor; 2, manufacturing an insulating wire core; 3, degassing; 4, wrapping a second semi-conductive water-blocking tape; 5, installing a sheath; 6, cabling for the first time; 7, preparing an alternating current submarine cable; 8, carrying out second cabling; 9, wrapping a lining layer; 10, wrapping and armoring; and 11, wrapping an outer coating layer. By the above mode, according to the production method of the alternating-current and direct-current hybrid submarine cable for offshore wind power adopts the two-time cabling method, overcomes the defect thatthe existing cabling equipment cannot conduct the five-core submarine cable cabling at the same time, the manufactured alternating-current and direct-current hybrid submarine cable directly takes direct current from a draught fan, laying is reduced from three times to one time, and therefore the cost of an alternating-current converter station and the laying cost of the alternating-current submarine cable are saved.

Description

technical field [0001] The invention belongs to the field of power cables, and in particular relates to a production method of an AC / DC hybrid submarine cable for offshore wind power. Background technique [0002] With the development of offshore wind power from the offshore to the far sea, AC submarine cables (array cables) are generally used to collect electric energy from the wind turbines, and then through the step-up station, the medium-high voltage AC power is converted into high-voltage AC power, and the high-voltage AC submarine cable is used to output electric energy, and then passed through The converter station converts high-voltage AC power into high-voltage DC power, and outputs power through the DC submarine cable. This requires an AC submarine cable booster station and a converter station. The cost is too high, and it is not easy to maintain in the later stage. There are also DC power directly from the fan. The scheme saves the link of AC submarine cable, dire...

AI Technical Summary

Problems solved by technology

[0002] With the development of offshore wind power from the offshore to the far sea, AC submarine cables (array cables) are generally used to collect electric energy from the wind turbines, and then through the step-up station, the medium-high voltage AC power is converted into high-voltage AC power, and the high-voltage AC submarine cable is used to output electric energy, and then passed through The converter station converts high-voltage AC power into high-voltage DC power, and outputs power through the DC submarine cable. This requires an AC submarine cable booster station and a converter station. The cost is too high, and it is not easy to maintain in the later stage. There are also DC power directly from the fan. The scheme saves the link of AC submarine cable, directly uses DC submarine cable to transmit electric energy, does not need AC submarine cable booster station, and thus saves the cost of AC converter station, but needs to lay AC submarine cable and DC submarine cable separately, and the cost of laying three times remains the same. very high

[0003] All submarine cables need to be armored, but generally they are three-core submarine cables, which can be completed by one-time cabling. However, AC and DC submarine cables generally have a five-core structure, which requires a lot of equipment modification and technical Difficulty is also great

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