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EP-4395091-B1 - DYNAMIC CABLE PROTECTION SYSTEM AND WIND POWER SYSTEM

EP4395091B1EP 4395091 B1EP4395091 B1EP 4395091B1EP-4395091-B1

Inventors

  • HU, MING
  • CAO, KAI
  • QIAO, Jing
  • ZHANG, HONGLIANG
  • WANG, LIYUAN
  • YE, Jinyu
  • WANG, WENCHAO
  • ZHANG, TIANYI
  • PAN, PAN
  • ZHAO, Youlin
  • ZHU, JINGHUA

Dates

Publication Date
20260506
Application Date
20230321

Claims (12)

  1. A dynamic cable protection system, comprising: a dynamic cable (10) that is located in a water environment and is configured to transmit a signal or electrical energy between a water-surface device and an underwater device; a plurality of first buoyancy devices (20) that are spaced apart on the dynamic cable (10) along a length direction of the dynamic cable (10); a plurality of second buoyancy devices (30) that are configured to float on a water surface; a plurality of first connecting devices (40), wherein the second buoyancy devices (30) are connected to the dynamic cable (10) through the first connecting devices (40), positions where the first connecting devices (40) are connected to the dynamic cable (10) are located between two adjacent first buoyancy devices (20), characterized in that the first connecting device (40) is a rope or an elastic cord; and in that the dynamic cable (10) is configured to, under drive of the first buoyancy devices (20) and the second buoyancy devices (30), present a plurality of crest segments with the first buoyancy devices (20) being crest positions, and a plurality of trough segments with connection positions between the first connecting devices (40) and the dynamic cable (10) being trough positions; and in that the second buoyancy devices (30) and the first connecting devices (40) provide an upward pulling action to limit lowest positions of the trough segments, and the trough segments are connected between two adjacent crest segments.
  2. The dynamic cable protection system according to claim 1, wherein the second buoyancy devices (30) comprise an upper buoyancy part (31) and a lower buoyancy part (32), the upper buoyancy part (31) and the lower buoyancy part (32) are hermetically connected to each other through a fixing part (33), and an average density of the upper buoyancy part (31) is less than or equal to an average density of the lower buoyancy part (32).
  3. The dynamic cable protection system according to claim 1, further comprising a counterweight device (60), wherein the counterweight device (60) is connected to the dynamic cable (10), and the counterweight device (60) is located at an end of the dynamic cable (10) close to the water-surface device.
  4. The dynamic cable protection system according to claim 1, further comprising a limiting device (70), wherein the limiting device (70) is connected to the dynamic cable (10) through a mooring device (71), a position where the mooring device (71) is connected to the dynamic cable (10) is located at an end of the dynamic cable (10) close to the underwater device, and the position where the mooring device (71) is connected to the dynamic cable (10) is further connected to the second buoyancy device (30) through the first connecting device (40).
  5. The dynamic cable protection system according to claim 4, wherein the limiting device (70) is fixed to a water bottom or suspended in water, the limiting device (70) pulls the dynamic cable (10) in a direction close to the water bottom.
  6. The dynamic cable protection system according to claim 5, wherein the dynamic cable (10) is provided with a protective device (13), the protective device (13) is located at least on a portion of an area between a connection position of the dynamic cable (10) to the underwater device and a connection position of the mooring device (71) to the dynamic cable (10).
  7. The dynamic cable protection system according to any one of claims 1-6, further comprising a second connecting device (50), wherein two adjacent second buoyancy devices (30) are connected through the second connecting device (50).
  8. The dynamic cable protection system according to any one of claims 1-6, wherein a surface of the dynamic cable (10) is covered with a biological inhibitor; or the surface of the dynamic cable (10) is covered with a sheath comprising the biological inhibitor.
  9. The dynamic cable protection system according to claim 7, wherein the second connecting device (50) is a rope or an elastic cord.
  10. A wind power system, comprising a water-surface device, an underwater device, a static cable and the dynamic cable protection system according to any one of claims 1-9, wherein the water-surface device is a floating wind turbine generator, the underwater device is a fixing device (82), one end of a dynamic cable (10) of the dynamic cable protection system is electrically connected to the floating wind turbine generator, and the other end of the dynamic cable (10) is connected to the static cable through the fixing device (82).
  11. The wind power system according to claim 10, wherein a position where the dynamic cable (10) is electrically connected to the floating wind turbine generator is provided with a first bending limiting device (11); and/or a position where the dynamic cable (10) is connected to the fixing device (82) is provided with a second bending limiting device (12).
  12. The wind power system according to claim 10, wherein the floating wind turbine generator and an adjacent second buoyancy device (30) are connected to each other through a second connecting device (50).

Description

TECHNICAL FIELD The present application relates to a technical field of offshore wind power generation, and in particular to a dynamic cable protection system and a wind power system. BACKGROUND A dynamic cable, as a special medium for power and signal transmission, plays an indispensable role in the marine industry power transmission and the communication control signal transmission. For example, in floating wind power generation, the dynamic cable is needed to transmit the generated electric energy out of the wind field; in offshore oil and gas development, the dynamic cable is needed to supply power for platforms and devices; and in offshore new energy power generation, underwater observation, scientific expedition, etc., the dynamic cable is needed to transmit electric energy. The dynamic cable is suspended in water, subjecting to combined effects of multiple factors such as marine hydrology, meteorology, etc., and thus it is inevitable that significant displacement, bending and twisting will occur, and in addition, a large number of marine organisms, such as shells and algae, in seawater accumulate on the dynamic cable, which will depress a linear shape of the dynamic cable, and if the dynamic cable is bent too much, it will cause the suspended portion of the dynamic cable in the water to move downwards and to be in contact with a seabed surface, and at this time, if the dynamic cable undergoes displacement and twisting motion, it will repeatedly rub against the seabed surface, seriously affecting use and lifespan of the dynamic cable. Therefore, there is an urgent need for a dynamic cable protection system and a wind power system to avoid the linear shape of the dynamic cable to be depressed and come into contact with the seabed surface, which affects the use and lifespan of the dynamic cable. US 2022/060009 A1 discloses an inter-array cable (IAC) assemblies, systems, and methods in which a conductive cable between two floating platforms, e.g., floating wind turbine platforms, is suspended below the sea surface and above the seabed. One or more buoyancy sections are included in the cable, which reduces the static tension on the connection at the floating platform by reducing the suspended cable weight, and which provides geometric flexibility, allowing the IAC to comply with platform motions. US 10988211 B2 discloses a system that maintains the relative and/or absolute geographical positions of two or more buoyant devices floating in a body of water. A plurality of formation restoring tethers permit the unrestricted vertical movement of networked buoyant devices, while resisting increases in their lateral separations by providing restoring forces to oppose such separations. Tensioning mechanisms incorporated into the tethers generate the resistance to the lateral separations of two or more entities by transforming such separations into an increase in the potential energy stored within such tensioning mechanisms, the potential energy of which is released in the process of restoring the original separations and/or positions of the displaced buoyant devices. US 2011/155383 A1 discloses a transfer system for transferring hydrocarbons, power or electrical/optical signals as the case may be from the seabed to the vessel or other buoyant structure in the shallow water when exposed to the environmental loadings from wind, wave and current. The conduit transfer system comprising a flexible pipe or umbilical extends from the buoyant unit at one end and to the seabed at the other end; and a riser support fixed to the seabed for supporting the flexible pipe characterized in that the flexible pipe a plurality of buoyancy beads for creating one or more inverse catenary curves of the flexible pipe to provide an excursion envelope. CN 113217295 A discloses a shallow water floating wind power system and its dynamic cable component. The dynamic cable component for shallow water floating wind power system provided by the present invention includes a dynamic cable, multiple buoyancy units, and multiple connection units. The connection unit includes a mooring chain and an elastic cable, and the dynamic cable is connected to the seabed through the mooring chain and the elastic cable. The connection unit and the buoyancy unit jointly define the line shape of the dynamic cable. The line shape of the dynamic cable includes a first trough segment, multiple peak segments, and a second trough segment between adjacent two peak segments. The buoyancy unit is set at the top of the peak segment, and the connection unit is set on the side of the peak segment away from the floating wind turbine. WO 2013/126325 A1 discloses an apparatus for transmitting oceanographic data includes a mooring cable having a data transmission cable configured to transmit the oceanographic data. A reinforcement layer surrounds the data transmission cable, and a protective outer jacket surrounds the reinforcement layer. The mooring cable has sections of dif