20 results about "Submarine power cable" patented technology

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.

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.

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 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.

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 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.

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 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.

A submarine power cable bundle including: a first bottom direct current, DC, submarine power cable, a second bottom DC submarine power cable, and a top DC submarine power cable, wherein the first bottom DC submarine power cable and the second bottom DC submarine power cable are bundled together by means of a first elongated bundling element, forming a first bundle, wherein the first bundle is bundled together with the top DC submarine power cable by means of a second elongated bundling element, forming a trefoil configuration, wherein the first elongated bundling element bundles the first bundle tighter than the second elongated bundling element bundles the first bundle and the top DC submarine power cable.

A multiphase submarine power cable (1) comprising: a plurality of power cores (3, 5, 7) arranged in a twisted configuration, and a bend sensor (15) comprising: an elongated elastic element (15a), and a plurality of fiber Bragg grating fibers, FBG, (15b), each FBG fiber (15b) extending axially along the elongated element (15a) at a radial distance from the center of the elongated element (15a); wherein the elongated element (15a) extends between the twisted power cores (3, 5, 7) along a central axis of the multiphase submarine power cable (1).

The invention discloses a crosslinked polyethylene insulated submarine power cable, which belongs to the field of cables and comprises a protective layer, and a plurality of supporting mechanisms are arranged on the surface of the protective layer. The supporting mechanism comprises a circular ring fixedly connected with the protective layer, the surface of the circular ring is slidably connected with a semicircular shell, the top of the left side of the semicircular shell extends to form a first extending block, and the first extending block on the right side extends into the second extending block on the left side, so that splicing of the multiple semicircular shells is achieved; the whole device is supported through the spliced semicircular shells, when a supporting object below the device is hollowed out due to long-term scouring of strong ocean current, the device is supported through the semicircular shells, the phenomenon that the device is suspended and fractures due to long-term stress vibration is effectively avoided, the armor layer is fixedly connected into the protective layer, and the armor layer is arranged in the protective layer. The inner core is fixedly connected to the interior of the armor layer, and the inner core is protected through the protective layer and the armor layer.

To provide a dynamic submarine power cable capable of extending the lifetime of the cable even if installed in a deep-sea environment.SOLUTION: A dynamic submarine power cable (1) for deep-sea applications includes: a conductor (5); an insulation system (7) arranged around the conductor (5), the insulation system including an inner semiconducting layer (7a) arranged around the conductor (5), an insulation layer (7b) arranged around the inner semiconducting layer (7a), and an outer semiconducting layer (7c) arranged around the insulation layer (7b); a bedding layer (9) arranged around the insulation system (7); and a longitudinally welded corrugated metallic water barrier (11) arranged around the bedding layer (9).SELECTED DRAWING: Figure 1