37 results about "Submarine power cable" patented technology

The invention discloses a crosslinked polyethylene insulated submarine power cable, which relates to the technical field of submarine power cables, is used for carrying out power transmission in a deep seabed, and comprises a cable body, and the cable body sequentially comprises an insulated outer protective layer, a tensile layer, an anti-corrosion layer, a steel tape armoring layer and an insulating layer from outside to inside, the interior of the insulating layer is formed by mutually winding a plurality of groups of conductor insulating shielding layers, the interior of the conductor insulating layer is formed by mutually winding a plurality of groups of conductor shielding layers, and a conductor water-blocking layer is arranged between the conductor insulating shielding layers and the conductor shielding layers; the conductor shielding layer is composed of a first conductor, a semiconductor water-blocking tape and a second conductor in sequence from outside to inside, and the cable solves the problems that when the cable is used in the seabed for a long time, the cable sheath is damaged due to long-term seawater corrosion, high-pressure seawater is diffused in the longitudinal direction through gaps existing in the cable, the long-distance cable is damaged, and the service life of the cable is prolonged. Therefore, the problem that the power cable is damaged and cannot transmit power is solved.

An offshore structure that is a floatable offshore structure that includes at least one submarine cable connector configured to connect a submarine power cable to an electrical device of the offshore structure. The offshore structure also includes at least one messenger line. A first end of the messenger line is fixed to the submarine power cable and a further end of the messenger line is fixed to the offshore structure.

Disclosed are systems and methods employing distributed fiber optic sensing (DFOS) / distributed acoustic sensing (DAS) that continuously monitor the buried / exposed status of undersea power cables for offshore wind farms. Our DAS systems and methods continuously monitor dynamic conditions characterizing undersea power cables and advantageously detect dynamic strain of an optical fiber that may be part of a composite cable with the power cable. By measuring and monitoring these dynamic conditions, a change in status from buried to exposed is determined and service personnel deployed before damage occurs to the power cable.

An electrical power distribution system 500 comprises a power cable and a shunt reactor 504 electrically connected to a conductor line 406a of the power cable. The shunt reactor comprises a winding having an open core such that, when submerged in water, the open core is water filled. The power cable may be a submarine power cable, or a pigtail cable (510a, 512a) arranged to electrically connect to a conductor line of a submarine power cable 402. The system may further comprise a non-magnetic support (602, Figures 6A-B) for securing the winding and maintaining its shape. The winding may contain no electrical shielding, or be absent a protective armour. The shunt reactor may further be electrically connected to a sheath 508a of the corresponding conductor line. The shunt reactor may be electrically connected at a splice connection of a plurality of cable segments spliced together. The shunt reactor may connect a non-magnetic ground terminal (408, Figure 4) to the conductor line. The system may comprise a plurality of conductor lines and a plurality of shunt reactors. The shunt reactor, being water filled in use, can be more lightweight and easier to install underwater than conventional shunt reactors.

A submarine connection box for connecting a system of submarine power cables, each including at least one submarine power cable core, the submarine connection box including: a casing, the casing having N first openings configured to receive a respective submarine power cable of a first set of N submarine power cables, N being an integer equal to or greater than 1, the casing having K second openings configured to receive a respective submarine power cable of a second set of K submarine power cables, K being an integer greater than 1, a termination box arranged inside the casing, the termination box having a housing including a first group of openings, and a second group of openings, each of the first group of openings being configured to receive a respective submarine power cable core of the first set of N submarine power cables, and each of the second group of openings being configured to receive a respective submarine power cable core of the second set of K submarine power cables, and L sets of connectors arranged in the termination box, L being an integer equal to the number of electrical phases or poles of the system of submarine power cables, wherein for each of the L sets, the connectors are electrically interconnected with each other and configured to connect submarine power cable cores of corresponding electrical phases or poles of the first set of N submarine power cables and the second set of K submarine power cables.

The invention provides an offshore comprehensive energy island power supply system based on single-line looped network and underwater caisson energy storage, which comprises an embedded optical fiber, the system comprises a first on-sea new energy DC / DC converter, a second on-sea new energy DC / DC converter, an (n-1) th on-sea new energy DC / DC converter, an nth on-sea new energy DC / DC converter, a first load DC / AC inverter, a second load DC / AC inverter and an (n-1) th load DC / AC inverter, wherein the first on-sea new energy DC / DC converter is in + 5G communication with a looped network power cable or a submarine power cable coaxial with a submarine power cable; the nth load DC / AC inverter, the first set of caisson energy storage, the nth set of caisson energy storage and the looped network controller. According to the invention, power supply and load power balance in the looped network is realized under the cooperation of offshore new energy DC / DC converter power generation, caisson energy storage and load inverter self-adaptive control.

The present invention relates to the technical field of subsea power cables. More specifically, the invention relates to a subsea power cable comprising at least one cable core, the cable core comprising a metal conductor, the metal conductor comprising at least one metal wire, wherein a section of the at least one metal wire along the longitudinal direction is surrounded with a material of low electrical conductivity.

A rigid submarine power cable joint including: an outer casing having a first axial end face and a second axial end face at an opposite axial end of the outer casing relative to the first axial end face, wherein the first axial end face includes a single opening configured to receive a multi-core dynamic submarine power cable, and wherein the second axial end face includes two openings, each configured to receive a respective single core submarine power cable.

A method for forming a subsea cable or a joint for a subsea cable is provided including providing a cable assembly that has at least a first conductor and a first insulation system surrounding the first conductor and forming a water barrier layer surrounding a length of the cable assembly. The water barrier layer has at least one coating of a metal material applied using a thermal spraying technique. A joint and a subsea cable obtainable by the above method is also provided.

The present invention relates to a fault location system (10) for localization of a fault in a submarine power cable (1). The fault location system (10) comprises a pulse generating device (20) for generating an electric pulse signal and a signal analyzing device (30) configured to determine the localization of the fault by analyzing a reflection signal resulting from the electric pulse signal being reflected from the submarine power cable. The pulse generating device (20) comprises a HV DC signal generator (22), a power cable (25) connected between the signal generator (22) and an output terminal (21a) of the device 20, and a switch (28) controlled by a control circuit. The control circuit (29) is configured to:turn the switch (28) off in order to charge the power cable (25) with power from the HV DC generator (22);turn the switch (28) on in order to discharge the power of the power cable (25) into the submarine power cable (1).

A submarine power cable including a conductor and an insulation system. The cable having a first cable section, a second cable section, and a joint region between the first cable section and the second cable section, and the conductor having a conductor joint in the joint region. The cable further including an armour including a plurality of elongated elements arranged around the insulation system the armour including a first single layer armour layer. Wherein, in the cable sections, the elongated elements of the first single layer armour layer include a plurality of cable section armouring elements and a plurality of filler elements, wherein, in the joint region, the elongated elements of the first single layer armour layer include a plurality of joint region armouring elements, the stiffness of the first single layer armour layer being higher in the joint region than in the first and second cable sections.

A submarine power cable comprises a cable core, a pipeline, a filling layer and a protective layer, and the cable core comprises a water-blocking conductor, a conductor shielding layer, an insulating layer, an insulating shielding layer, a buffer layer, a lead sheath layer and a semi-conductive sheath layer which are sequentially coated from inside to outside; the hollow pipeline is arranged on the outer side of the cable core along the radial direction; the filling layer coats the surfaces of the cable core and the pipeline; the protective layer comprises a water-blocking binding tape layer, a corrugated aluminum sheath layer, a polyethylene sheath layer, a steel wire armor layer and a polypropylene sheath layer which are sequentially coated from inside to outside; and the water-blocking binding tape layer is coated on the surface of the filling layer. According to the submarine power cable provided by the embodiment of the invention, redundancy design is carried out in the aspects of protection and water blocking, so that the external force damage resistance of the submarine power cable is improved; and the pipeline is arranged in the submarine power cable, so that power transmission is realized, fluid substances such as water, oil and gas can be conveyed at the same time, and multi-functionalization of the submarine power cable is realized.

A method of manufacturing a wet or semi-wet design high voltage or extra high voltage submarine power cable, the method including: a) supplying polymer materials to an extruder from a material handling room, the material handling room fulfilling clean room class 8 or cleaner according to ISO-14644-1: 2015, and b) extruding an insulation system, including an insulation layer, around a conductor in the extruder using the polymer material, the extruder fulfilling the requirements of clean room class 8 or cleaner according to ISO-14644-1: 2015.

A submarine power cable system having: a wet design power cable section including a first conductor section, a first insulation system section arranged around the first conductor section, and a screen layer formed by one or more of helically laid elongated metal elements arranged around the first insulation system section, and a static power cable section, which is a moisture buffer zone, including a second conductor section connected to the first conductor section and a second insulation system section connected to the first insulation system section by means of a flexible joint, the static power cable section further including a metallic radial water-blocking sheath arranged around the second insulation system section, wherein the metallic radial water-blocking sheath is electrically connected to the screen layer, and wherein, from the flexible joint to a far end of the static power cable section the submarine power cable system has an axial length in a range of 1-1000 m, the far end being arranged to be connected to or being connected to a subsea electric component.

A submarine power cable system including: a dynamic submarine power cable having an element with a first axial section and a second axial section which are joined at a joint location; and a bend restriction device arranged around the dynamic submarine power cable, wherein the bend restriction device extends axially over the joint location, and wherein the bend restriction device is arranged to restrict bending of the dynamic submarine power cable at the joint location.

A rigid sea joint system for jointing submarine power cables, the rigid sea joint system including: an outer mechanical metal casing arranged to accommodate an electrical joint between a first submarine power cable and a second submarine power cable, the outer mechanical metal casing having a first end provided with a first opening configured to receive a portion of the first submarine power cable into an interior of the outer mechanical metal casing, and a second end provided with a second opening configured to receive a portion of the second submarine power cable into the interior of the outer mechanical metal casing, a first metal adapter flange attached to the first end, around the first opening, a second metal adapter flange attached to the second end, around the second opening, a first metal bend restrictor attached to the first metal adapter flange, a second metal bend restrictor attached to the second metal adapter flange, a first electrically insulating element arranged between the first metal adapter flange and the outer mechanical metal casing, electrically insulating the outer mechanical metal casing from the first metal bend restrictor, and a second electrically insulating element arranged between the second metal adapter flange and the outer mechanical metal casing, electrically insulating the outer mechanical metal casing from the second metal bend restrictor.

The present invention relates to the technical field of subsea power cables. More specifically, the invention relates to a method of manufacturing a high voltage power cable comprising a cable core surrounded by an insulation system, wherein the cable core comprises conductor elements and a water blocking composition, wherein the method comprises the steps of stranding the conductor elements to obtain a stranded bundle of conductor elements, introducing the water blocking composition in the voids left in the stranded bundle of conductor elements, degassing of the water blocking composition, obtaining the cable core, and surrounding the insulation system coaxially around the cable core. The present invention further relates to a high voltage power cable produced by the method according to the invention and a use of the high voltage power cable.

A submarine power cable (100) comprising a conductor (108) and an insulation system (109). The cable having a first cable section (102), a second cable section (104), and a joint region (112) between the first cable section (102) and the second cable section (104), and the conductor (108) having a conductor joint (110) in the joint region (112). The cable further comprising an armour (114) comprising a plurality of elongated elements arranged around the insulation system (109) the armour (114) comprising a first single layer armour layer (115). Wherein, in the cable sections (102, 104), the elongated elements of the first single layer armour layer (115) comprise a plurality of cable section armouring elements (116) and a plurality of filler elements (118), wherein, in the joint region (112), the elongated elements of the first single layer armour layer (115) comprise a plurality of joint region armouring elements (120), the stiffness of the first single layer armour layer (115) being higher in the joint region (112) than in the first and second cable sections (102, 104).

A submarine power cable (1, 101, 201) comprising: a conductor (2); an insulation system (5) including at least a first semiconducting layer (3) provided around the conductor (2), and an insulation layer (4) provided around the first semiconducting layer (3); a water barrier layer (7, 107, 207) surrounding the insulation system (5). The water barrier layer (7, 107, 207) is obtained from a composition comprising a base polymer in an amount of at least 50 wt% and an additive being graphene, graphene or graphite nanoplatelets, graphene oxide, reduced graphene oxide and / or graphite in an amount of between 0.05 wt% and 10 wt%, preferably between 0.25 wt% and 6 wt %, more preferably between 0.5 wt% and 2 wt%, based on the weight of the composition.

The invention discloses a 500kV high-pressure deepwater submarine power cable, which comprises a body, the inner layer of the body comprises at least one core wire unit (1), the outer layer of the core wire unit (1) comprises a composite pipe layer (1.1), the composite pipe layer (1.1) comprises a copper pipe (1.1. 1) and a steel pipe (1.1. 2), the copper pipe (1.1. 1) is connected with the steel pipe (1.1. 2), the steel pipe (1.1. 2) is arranged on the outer layer of the copper pipe (1.1. 1), and the copper pipe (1.1. 1) is connected with the steel pipe (1.1. 2). The outer layer of the composite pipe layer (1.1) is provided with a core wire sheath layer (1.2) made of a PE material. The invention provides a 500kV high-pressure deepwater submarine power cable which has stronger mechanical strength protection and is suitable for the water depth of below 1500m.

A dynamic submarine power cable for deep-sea applications, including: a conductor, an insulation system arranged around the conductor, the insulation system including an inner semiconducting layer arranged around the conductor, an insulation layer arranged around the inner semiconducting layer, and an outer semiconducting layer arranged around the insulation layer, a bedding layer arranged around the insulation system, and a longitudinally welded corrugated metallic water barrier arranged around the bedding layer, wherein the bedding layer fills the corrugations of the corrugated metallic water barrier, wherein the bedding layer includes a single layer which has an initial stiffness at onset of compressive stress to provide structural support against external hydrostatic pressure exerted on the metallic water barrier, and an increased elasticity as compared to the initial stiffness when the compressive stress has reached a stress threshold to absorb cyclic thermal expansion and contraction of the insulation layer, or wherein the bedding layer includes an outer layer and an inner layer, wherein the outer layer fills the corrugations and is stiffer than the inner layer and provides structural support against external hydrostatic pressure exerted on the corrugated metallic water barrier, the inner layer providing elasticity to absorb cyclic thermal expansion and contraction of the insulation layer.

To provide a method of manufacturing a wet or semi-wet high-voltage or extra-high-voltage submarine power cable which can manufacture an insulation layer without or with only a very small quantity of foreign particles.SOLUTION: A method of manufacturing a wet or semi-wet design high-voltage or extra-high-voltage submarine power cable includes: a) supplying polymer materials to an extruder from a material handling room, where the material handling room fulfills clean room class 8 according to ISO-14644-1: 2015 or is cleaner; and b) extruding an insulation system, including an insulation layer, around a conductor in the extruder using the polymer material, where the extruder fulfills the requirements of clean room class 8 according to ISO-14644-1: 2015 or is cleaner.SELECTED DRAWING: Figure 2

A power cable comprising a joint, wherein a first conductor end (33) comprising a first tension element (35) is electrically and mechanically connected to a second conductor end (33') with a second tension element (35'), wherein the joint comprises a compression ferrule (10) with a longitudinal aperture, wherein the compression ferrule comprises at least two compression zones (20) that have been compressed respectively onto the first conductor end (33) and the second conductor end (33') inserted into the aperture of the compression ferrule from opposite sides is disclosed.

An offshore system including: a dynamic submarine power cable, a bend stiffener having a lower end and a top end, the bend stiffener having a central channel extending from the lower end to the top end, the central channel receiving the dynamic submarine power cable with a radial spacing between an inner surface of the central channel and an outer surface of the dynamic submarine power cable along the length of the dynamic submarine power cable arranged in the bend stiffener, the radial spacing forming a longitudinal water channel between the bend stiffener and the dynamic submarine power cable, and an offshore structure tube connected to the bend stiffener, wherein the offshore structure tube has an inner tube channel in fluid communication with the longitudinal water channel, and wherein A) the offshore structure tube has a through-opening extending from the inner tube channel through a wall of the offshore structure tube to enable water flowing from the lower end through the bend stiffener to exit the offshore structure tube via the through-opening to provide water cooling of the dynamic submarine power cable in the bend stiffener, or B) the bend stiffener has a radial through-opening arranged within ¼ of a total axial length of the bend stiffener, defined by a distance between the lower end and the top end, from the top end to enable water flowing from the lower end through the bend stiffener to exit the bend stiffener via the radial through-opening to provide water cooling of the dynamic submarine power cable in the bend stiffener.

To provide a method and an assembly for jointing armours of submarine power cables.SOLUTION: Provided is an armour joint assembly for power cables, the armour joint assembly including: two tubes adapted to fit over the power cables, each tube being provided with a flange; a plurality of annular spacers positioned in succession to each other between the two flanges; two sorting organizers positioned on the sides of the two flanges, each sorting organizer including at least one annular element adapted to arrange armour wires of the power cables; and two conical shells, each adapted to be positioned around the power cable and coupled to the flange to form a closed shell that encloses the sorting organizer, each conical shell being provided with a loading aperture for inserting resin.SELECTED DRAWING: Figure 1e

A submarine power cable (100) comprising a conductor (108) and an insulation system (109). The cable having a first cable section (102), a second cable section (104), and a joint region (112) between the first cable section (102) and the second cable section (104), and the conductor (108) having a conductor joint (110) in the joint region (112). The cable further comprising an armour (114) comprising a plurality of elongated elements arranged around the insulation system (109) the armour (114) comprising a first single layer armour layer (115). Wherein, in the cable sections (102, 104), the elongated elements of the first single layer armour layer (115) comprise a plurality of cable section armouring elements (116) and a plurality of filler elements (118), wherein, in the joint region (112), the elongated elements of the first single layer armour layer (115) comprise a plurality of joint region armouring elements (120), the tensional strength of the first single layer armour layer (115) being higher in the joint region (112) than in the first and second cable sections (102, 104).

A submarine power cable, including: a conductor, an insulation system arranged around the conductor, the insulation system including an inner semiconducting layer, an insulation layer arranged around the inner semiconducting layer, and an outer semiconducting layer arranged around the insulation layer, a metallic water blocking layer arranged around the insulation system, the metallic water blocking layer having a longitudinal weld seam, and a metallic tape arranged radially outside the metallic water blocking layer, wherein the metallic tape extends axially along and is bonded to the weld seam.

The present invention relates to the technical field of subsea power cables. More specifically, the invention relates to a subsea power cable comprising at least one cable core comprising a bundle of metal wires and more than one layer of a cured two-component hardening composition, wherein the more than one layer of the cured two-component hardening composition is intermittently provided along the longitudinal direction of the power cable. The present invention further relates to a method of manufacturing the power cable according to the invention.

A submarine power cable having: a conductor; an insulation system including at least a first semiconducting layer provided around the conductor, and an insulation layer provided around the first semiconducting layer; and a laminate water barrier structure provided around the insulation system, the laminate water barrier structure including a metallic foil and an adhesive polymer layer arranged in direct contact with the metallic foil. The adhesive polymer layer is obtained from a composition including a base polymer in an amount of at least 50 wt % and an additive being graphene, graphene or graphite nanoplatelets, graphene oxide, reduced graphene oxide and / or graphite in an amount of between 0.05 wt % and 10 wt %, preferably between 0.25 wt % and 5 wt %, more preferably between 0.5 wt % and 2 wt %, based on the weight of the composition.

A coupling assembly (1) for electrically coupling a first plurality of submarine power cables (20) to a second plurality of submarine power cables (22), the first and second plurality of cables arranged in one or more cable groups, the coupling assembly (1) comprising: a first coupling member (2) comprising a first housing (3) for electrically coupling to the first plurality of cables (20), and a second coupling member (8) comprising a second housing (9) for electrically coupling to the second plurality of cables (22); the first housing (3) including a first gate (40) positioned at an interface thereof, and the second housing (9) including a second gate (45) positioned at an interface thereof; the first and second gates (40, 45) configured to rotate about their respective normal axis (X) for reaching a connected state for each cable group and forming an opening.