EP3910650A1 - Shore-to-ship cable - Google Patents
Shore-to-ship cable Download PDFInfo
- Publication number
- EP3910650A1 EP3910650A1 EP20173810.1A EP20173810A EP3910650A1 EP 3910650 A1 EP3910650 A1 EP 3910650A1 EP 20173810 A EP20173810 A EP 20173810A EP 3910650 A1 EP3910650 A1 EP 3910650A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cable
- conductors
- electrical phase
- conductor
- phase conductors
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004020 conductor Substances 0.000 claims abstract description 101
- 238000009413 insulation Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000013536 elastomeric material Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 229920000098 polyolefin Polymers 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 229920001169 thermoplastic Polymers 0.000 claims description 4
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 4
- 239000004416 thermosoftening plastic Substances 0.000 claims description 4
- 239000012809 cooling fluid Substances 0.000 claims description 3
- 239000004809 Teflon Substances 0.000 claims description 2
- 229920006362 TeflonĀ® Polymers 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 239000004709 Chlorinated polyethylene Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
- H01B7/045—Flexible cables, conductors, or cords, e.g. trailing cables attached to marine objects, e.g. buoys, diving equipment, aquatic probes, marine towline
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/006—Constructional features relating to the conductors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J3/00—Driving of auxiliaries
- B63J3/04—Driving of auxiliaries from power plant other than propulsion power plant
- B63J2003/043—Driving of auxiliaries from power plant other than propulsion power plant using shore connectors for electric power supply from shore-borne mains, or other electric energy sources external to the vessel, e.g. for docked, or moored vessels
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1895—Internal space filling-up means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
- H01B7/421—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation
- H01B7/423—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid
- H01B7/425—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid the construction being bendable
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/003—Power cables including electrical control or communication wires
Definitions
- the present invention relates to a cable suitable for supplying shore-to-ship electrical power to ships docked in ports.
- electrical power can be provided to ships docked in ports through shore-to-ship power supply systems. Due to the size and power needs of the ships, such power supply systems rely on cables being able to carry large electric loads.
- CN109585059A discloses a pressure-resistant, wear-resistant and low-temperature-resistant ship shore power cable.
- the cable comprises a main wire core, a ground wire core, a control wire core, a fibre combination unit and a filling core.
- the cable is very stiff and can only slightly be bent. Putting the cable in place when connecting a ship to the shore power is difficult and time-consuming, since the cable cannot be bent into a desired shape.
- CN106856109A discloses a ship-shore connection cable which comprises a cable core which is externally wrapped by a chlorinated polyethylene inner sheath.
- the inner sheath is externally wrapped by an aramid yarn braided layer and a chlorinated polyethylene outer sheath.
- the cable is very stiff and can only slightly be bent, rendering the installation of the cable difficult and time-consuming.
- the halogenated materials in the cable are a health hazard in case of fire.
- the problem of the present invention is to provide an improved cable that is suitable for supplying shore-to-ship electrical power to ships docked in ports.
- the cable shall be able to carry large currents of 1000A or more.
- the cable shall be flexible with a bending radius below 300 mm to allow easy and fast installation and connection between shore and ship.
- the cable shall have a long service life.
- the inventive solution shall withstand sprays of seawater and other media that are currently encountered in ports.
- the cable shall be made from materials that do not pose a threat to health in case of fire.
- the cable for supplying shore-to-ship electrical power to ships through several conductors comprises:
- the first electrical phase conductors, the second electrical phase conductors and the third electrical phase conductors have nearly identical cross-sections.
- the cable allows for supplying high-energy three-phase electric power to a ship.
- a first phase of the three-phase electric power is passed through the at least two insulated first electrical phase conductors.
- the second phase of the three-phase electric power is passed through the at least two insulated second electrical phase conductors.
- the third phase of the three-phase electric power is passed through the at least two insulated third electrical phase conductors.
- the first phase conductors are electrically connected together.
- the second phase conductors are at shore and on the ship electrically connected together.
- Equally, the third phase conductors are at shore and on the ship electrically connected together.
- the grounding conductor allows for a safe electrical connection.
- the cable is flexible with a low bending radius because of the nearly identical cross-sections of the conductors present in the cable. The cable is easily and quickly installed to connect a ship to electric power from shore.
- the conductors are formed from Copper or Aluminium or an alloy comprising Copper or Aluminium.
- the insulation layers are preferably made from a thermoplastic elastomer, a polyolefin polymer or a mixture comprising a thermoplastic elastomer or a polyolefin polymer.
- an antifriction tape preferably formed from Teflon, is wrapped around each of the insulation layers of the conductors.
- the antifriction tape reduces internal friction when moving or bending the cable, extending the service life of the cable.
- the inner sheath consists of a plastic material, preferably a polyurethane material or a thermoplastic elastomeric material that protects the inner layers and conductors against mechanical and chemical impact.
- the outer sheath preferably consists of a plastic material, preferably a polyurethane material or a thermoplastic elastomeric material that protects the inner layers and conductors against mechanical and chemical impact.
- the cable can therefore withstand sprays of seawater and other media that are currently encountered in ports, giving the cable a long service life. Additionally, the cable no threat to health in case of fire is posed by the materials used for the cable.
- the cable further comprises at least one conductor pair, which is preferably centrally arranged within the cable, to transmit data or steering signals.
- the cable comprises several conductor pairs, to transmit data or steering signals.
- the conductor pairs are preferably used to transmit data about the status of the cable or the shore-to-ship electric power supply system. This allows a monitoring of the cable or system status, such that upcoming failure of the cable or system can be predicted and hence avoided by power reduction or replacement of the cable.
- the cable further comprises a tube, which is preferably centrally arranged within the cable, through which a cooling fluid can circulate to cool the cable.
- the tube is preferably watertight. By circulating a cooling fluid through the tube, the cable can be cooled to guarantee an optimized working temperature and reduce failure.
- the cable has a minimum bending radius of less than 10 times its diameter.
- the cable has a minimum bending radius of 300 millimetres.
- the cable is hence flexible enough, to be put in a working position to connect a ship to a shore-based power supply unit.
- the cable further comprises a shielding layer and/or a reinforcing layer and/or an optical conductor.
- the cable comprises several grounding conductors.
- the cable can preferably carry electric currents of 1000A or above.
- each individual conductor has an electric linear resistance of less than 1.4Ohms/km. The power loss and accompanying ohmic heating of the cable are thus reduced.
- the grounding conductors have preferably the same cross-section as the first electrical phase conductors, the second electrical phase conductors and the third electrical phase conductors. This results in a lower overall bending radius of the cable and an improved stability towards repeated bending cycles.
- an equally inventive system for supplying shore-to-ship electrical power to ships docked in ports can be realized.
- the system allows for a fast and easy connection of ships to shore-power even for large electric energy needs.
- the system comprises at least one support structure over which the cable is guided from the shore to the ship.
- the support structure facilitates the electrical connection and de-connection of a ship arriving at or leaving a port. Through the support structure, the cables are neatly guided, such that loading or unloading the ship can is not obstructed.
- the system further comprising at least one power supply unit that is electrically connected to the cable based on the shore.
- the power supply unit may be an electric generator, a photovoltaic unit or a transformation station connected to a high-voltage power grid.
- Fig. 1a shows a cross-sectional view of a first embodiment of an inventive cable 10.
- the cable comprises several conductors 1, each of which is enclosed in an electrically insulated by an insulation layer 2.
- An inner sheath 3 is formed around and fills the space and gaps between the insulation layers 2 of the conductors 1.
- An outer sheath 4 encompasses the inner sheath 3 and the other inner components of the cable 10.
- the cable 10 comprises three conductor pairs 5.
- the conductor pairs 5 are formed from Copper or Aluminium stranded wires having a lower cross-section than the other conductors 1 in the cable.
- Each conductor of the conductor pairs 5 is electrically insulated.
- Fig. 1b shows the cable 10 from Fig. 1a with labelled first phase conductors (1A1, 1A2, 1A3, ...), second phase conductors (1B1, 1B2, 1B3,...), third phase conductors (1C1, 1C2, 1C3,%) and grounding conductors (1G1, 1G2, 1G3,). All conductors (1, 1A1, 1A2, 1A3,..., 1B1, 1B2, 1B3,... 1C1, 1C2, 1C3,...) are electrically insulated by an insulation layer 2 enclosing each conductor.
- the first phase conductors (1A1, 1A2, 1A3,...) are designed to carry a first phase of an electric three-phase power
- the second phase conductors (1B1, 1B2, 1B3,...) are designed to carry a second phase of an electric three-phase power
- the third phase conductors (1C1, 1C2, 1C3,...) are designed to carry a third phase of an electric three-phase power.
- Fig. 2 shows a cross-sectional view of a second embodiment of an inventive cable 10.
- the cable comprises three first phase conductors (1A1, 1A2, 1A), three second phase conductors (1B1, 1B2, 1B3), three third phase conductors (1C1, 1C2, 1C3) and a grounding conductor (1G1) each of which is enclosed in an electrically insulated by an insulation layer 2.
- An inner sheath 3 is formed around and fills the space and gaps between the insulation layers 2 of the conductors.
- An outer sheath 4 encompasses the inner sheath 3 and the other inner components of the cable 10.
- the cable 10 comprises a tube 6 which is arranged at the center of the cable 10. The tube 6 is hollow, allowing fluids to be passed through the tube.
- Fig. 3 shows schematically an inventive cable 10 as part of an inventive shore-to-ship electrical power system to power a ship 50.
- the ship 50 is docked in a port.
- a cable 10 is electrically connected to a power supply unit 30.
- the cable 10 is guided over a support structure 20 before being electrically connected to the ship 50. With the support structure 20, the cable 10 is precisely and in a controlled manner guided to the ship.
Landscapes
- Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Insulated Conductors (AREA)
- Communication Cables (AREA)
Abstract
- at least two first electrical phase conductors (1A1, 1A2, 1A3,...), each first electrical phase conductor (1A1, 1A2, 1A3,...) being enclosed in and electrically insulated by an insulation layer (2);
- at least two second electrical phase conductors (1B1, 1B2, 1B3,...), each second electrical phase conductor (1B1, 1B2, 1B3,...) being enclosed in and electrically insulated by an insulation layer (2);
- at least two third electrical phase conductors (1C1, 1C2, 1C3,...), each third electrical phase conductor (1C1, 1C2, 1C3,...) being enclosed in and electrically insulated by an insulation layer (2);
- at least one grounding conductor (1GA1, 1G2, 1G3,...), each grounding conductor (1G1, 1G2, 1G3,...) being enclosed in and electrically insulated by an insulation layer (2);
- an inner sheath (3), formed around and filling the space and gaps between the insulation layers (2);
- an outer sheath (4) enclosing said inner sheath (3) .
Description
- The present invention relates to a cable suitable for supplying shore-to-ship electrical power to ships docked in ports.
- When docked in ports, ships generate emissions by running their engines to create onboard electric power. This creates emissions that have a negative health and environmental impact on the local surroundings and on people working or staying on or around the ships.
- To reduce emissions, electrical power can be provided to ships docked in ports through shore-to-ship power supply systems. Due to the size and power needs of the ships, such power supply systems rely on cables being able to carry large electric loads.
-
CN109585059A discloses a pressure-resistant, wear-resistant and low-temperature-resistant ship shore power cable. The cable comprises a main wire core, a ground wire core, a control wire core, a fibre combination unit and a filling core. The cable is very stiff and can only slightly be bent. Putting the cable in place when connecting a ship to the shore power is difficult and time-consuming, since the cable cannot be bent into a desired shape. -
CN106856109A discloses a ship-shore connection cable which comprises a cable core which is externally wrapped by a chlorinated polyethylene inner sheath. The inner sheath is externally wrapped by an aramid yarn braided layer and a chlorinated polyethylene outer sheath. The cable is very stiff and can only slightly be bent, rendering the installation of the cable difficult and time-consuming. The halogenated materials in the cable are a health hazard in case of fire. - The problem of the present invention is to provide an improved cable that is suitable for supplying shore-to-ship electrical power to ships docked in ports. The cable shall be able to carry large currents of 1000A or more.
- The cable shall be flexible with a bending radius below 300 mm to allow easy and fast installation and connection between shore and ship.
- Further, the cable shall have a long service life.
- The inventive solution shall withstand sprays of seawater and other media that are currently encountered in ports.
- Additionally, the cable shall be made from materials that do not pose a threat to health in case of fire.
- The problem is solved by a cable according to
claim 1 and a shore-to-ship electrical power system according to claim 13. Further preferred embodiments of the invention are defined in dependent claims. - The cable, for supplying shore-to-ship electrical power to ships through several conductors comprises:
- at least two first electrical phase conductors, each first electrical phase conductor being enclosed in and electrically insulated by an insulation layer;
- at least two second electrical phase conductors, each second electrical phase conductor being enclosed in and electrically insulated by an insulation layer;
- at least two third electrical phase conductors, each third electrical phase conductor being enclosed in and electrically insulated by an insulation layer;
- at least one grounding conductor, each grounding conductor being enclosed in and electrically insulated by an insulation layer.
- an inner sheath (3), formed around and filling the space and gaps between the insulation layers (2);
- an outer sheath (4) enclosing said inner sheath (3).
- According to the invention, the first electrical phase conductors, the second electrical phase conductors and the third electrical phase conductors have nearly identical cross-sections.
- The cable allows for supplying high-energy three-phase electric power to a ship. A first phase of the three-phase electric power is passed through the at least two insulated first electrical phase conductors. The second phase of the three-phase electric power is passed through the at least two insulated second electrical phase conductors. The third phase of the three-phase electric power is passed through the at least two insulated third electrical phase conductors. At shore and on the ship, the first phase conductors are electrically connected together. The second phase conductors are at shore and on the ship electrically connected together. Equally, the third phase conductors are at shore and on the ship electrically connected together. The grounding conductor allows for a safe electrical connection. The cable is flexible with a low bending radius because of the nearly identical cross-sections of the conductors present in the cable. The cable is easily and quickly installed to connect a ship to electric power from shore.
- In preferred embodiments, the conductors are formed from Copper or Aluminium or an alloy comprising Copper or Aluminium. The insulation layers are preferably made from a thermoplastic elastomer, a polyolefin polymer or a mixture comprising a thermoplastic elastomer or a polyolefin polymer.
- In further preferred embodiments, an antifriction tape, preferably formed from Teflon, is wrapped around each of the insulation layers of the conductors. The antifriction tape reduces internal friction when moving or bending the cable, extending the service life of the cable.
- In yet another preferred embodiment, the inner sheath consists of a plastic material, preferably a polyurethane material or a thermoplastic elastomeric material that protects the inner layers and conductors against mechanical and chemical impact. The outer sheath preferably consists of a plastic material, preferably a polyurethane material or a thermoplastic elastomeric material that protects the inner layers and conductors against mechanical and chemical impact. The cable can therefore withstand sprays of seawater and other media that are currently encountered in ports, giving the cable a long service life. Additionally, the cable no threat to health in case of fire is posed by the materials used for the cable.
- In further preferred embodiments, the cable further comprises at least one conductor pair, which is preferably centrally arranged within the cable, to transmit data or steering signals. Preferably, the cable comprises several conductor pairs, to transmit data or steering signals. The conductor pairs are preferably used to transmit data about the status of the cable or the shore-to-ship electric power supply system. This allows a monitoring of the cable or system status, such that upcoming failure of the cable or system can be predicted and hence avoided by power reduction or replacement of the cable.
- Preferably, the cable further comprises a tube, which is preferably centrally arranged within the cable, through which a cooling fluid can circulate to cool the cable. The tube is preferably watertight. By circulating a cooling fluid through the tube, the cable can be cooled to guarantee an optimized working temperature and reduce failure.
- In a particularly preferred embodiment, the cable has a minimum bending radius of less than 10 times its diameter. Preferably, the cable has a minimum bending radius of 300 millimetres. The cable is hence flexible enough, to be put in a working position to connect a ship to a shore-based power supply unit.
- In yet another preferred embodiment, the cable further comprises a shielding layer and/or a reinforcing layer and/or an optical conductor. Preferably the cable comprises several grounding conductors.
- The cable can preferably carry electric currents of 1000A or above.
- In a preferred embodiment according to the invention, each individual conductor has an electric linear resistance of less than 1.4Ohms/km. The power loss and accompanying ohmic heating of the cable are thus reduced.
- The grounding conductors have preferably the same cross-section as the first electrical phase conductors, the second electrical phase conductors and the third electrical phase conductors. This results in a lower overall bending radius of the cable and an improved stability towards repeated bending cycles.
- With an inventive cable, an equally inventive system for supplying shore-to-ship electrical power to ships docked in ports can be realized. The system allows for a fast and easy connection of ships to shore-power even for large electric energy needs.
- Preferably, the system comprises at least one support structure over which the cable is guided from the shore to the ship. The support structure facilitates the electrical connection and de-connection of a ship arriving at or leaving a port. Through the support structure, the cables are neatly guided, such that loading or unloading the ship can is not obstructed.
- Particularly preferred, the system further comprising at least one power supply unit that is electrically connected to the cable based on the shore. The power supply unit may be an electric generator, a photovoltaic unit or a transformation station connected to a high-voltage power grid.
- The present invention will be further described by way of example, with reference to the accompanying drawings, wherein:
- Fig. 1a
- depicts a cross-sectional view of a first embodiment of an
inventive cable 10; - Fig. 1b
- depicts the
cable 10 fromFig. 1a with labelled first phase conductors (1A1, 1A2, 1A3,...), second phase conductors (1B1, 1B2, 1B3,...), third phase conductors (1C1, 1C2, 1C3,...) and grounding conductors (1G1, 1G2, 1G3,...); - Fig. 2
- depicts a cross-sectional view of a second embodiment of an
inventive cable 10; and - Fig. 3
- schematically depicts an
inventive cable 10 as part of an inventive shore-to-ship electrical power system to power aship 50. -
Fig. 1a shows a cross-sectional view of a first embodiment of aninventive cable 10. The cable comprisesseveral conductors 1, each of which is enclosed in an electrically insulated by aninsulation layer 2. Aninner sheath 3 is formed around and fills the space and gaps between the insulation layers 2 of theconductors 1. Anouter sheath 4 encompasses theinner sheath 3 and the other inner components of thecable 10. - In the center of the
cable 10, thecable 10 comprises three conductor pairs 5. The conductor pairs 5 are formed from Copper or Aluminium stranded wires having a lower cross-section than theother conductors 1 in the cable. Each conductor of the conductor pairs 5 is electrically insulated. -
Fig. 1b shows thecable 10 fromFig. 1a with labelled first phase conductors (1A1, 1A2, 1A3, ...), second phase conductors (1B1, 1B2, 1B3,...), third phase conductors (1C1, 1C2, 1C3,...) and grounding conductors (1G1, 1G2, 1G3,...). All conductors (1, 1A1, 1A2, 1A3,..., 1B1, 1B2, 1B3,... 1C1, 1C2, 1C3,...) are electrically insulated by aninsulation layer 2 enclosing each conductor. The first phase conductors (1A1, 1A2, 1A3,...) are designed to carry a first phase of an electric three-phase power, the second phase conductors (1B1, 1B2, 1B3,...) are designed to carry a second phase of an electric three-phase power and the third phase conductors (1C1, 1C2, 1C3,...) are designed to carry a third phase of an electric three-phase power. -
Fig. 2 shows a cross-sectional view of a second embodiment of aninventive cable 10. The cable comprises three first phase conductors (1A1, 1A2, 1A), three second phase conductors (1B1, 1B2, 1B3), three third phase conductors (1C1, 1C2, 1C3) and a grounding conductor (1G1) each of which is enclosed in an electrically insulated by aninsulation layer 2. Aninner sheath 3 is formed around and fills the space and gaps between the insulation layers 2 of the conductors. Anouter sheath 4 encompasses theinner sheath 3 and the other inner components of thecable 10. Thecable 10 comprises atube 6 which is arranged at the center of thecable 10. Thetube 6 is hollow, allowing fluids to be passed through the tube. -
Fig. 3 shows schematically aninventive cable 10 as part of an inventive shore-to-ship electrical power system to power aship 50. Theship 50 is docked in a port. Onshore 40, acable 10 is electrically connected to apower supply unit 30. Thecable 10 is guided over asupport structure 20 before being electrically connected to theship 50. With thesupport structure 20, thecable 10 is precisely and in a controlled manner guided to the ship. -
- 1
- conductor
- 1A1, 1A2, 1A3...
- first electrical phase conductors
- 1B1, 1B2, 1B3...
- second electrical phase conductors
- 1C1, 1C2, 1C3...
- third electrical phase conductors
- 1G1, 1G2, 1G3...
- grounding conductors
- 2
- insulation layer
- 3
- inner sheath
- 4
- outer sheath
- 5
- conductor pairs
- 6
- tube
- 10
- cable
- 20
- support structure
- 30
- power supply unit
- 40
- shore
- 50
- ship
Claims (15)
- A cable (10) for supplying shore-to-ship electrical power to ships (50) through several conductors (1) comprising:- at least two first electrical phase conductors (1A1, 1A2, 1A3,...), each first electrical phase conductor (1A1, 1A2, 1A3,...) being enclosed in and electrically insulated by an insulation layer (2);- at least two second electrical phase conductors (1B1, 1B2, 1B3,...), each second electrical phase conductor (1B1, 1B2, 1B3,...) being enclosed in and electrically insulated by an insulation layer (2);- at least two third electrical phase conductors (1C1, 1C2, 1C3,...), each third electrical phase conductor (1C1, 1C2, 1C3,...) being enclosed in and electrically insulated by an insulation layer (2);- at least one grounding conductor (1GA1, 1G2, 1G3,...), each grounding conductor (1G1, 1G2, 1G3,...) being enclosed in and electrically insulated by an insulation layer (2);- an inner sheath (3), formed around and filling the space and gaps between the insulation layers (2);- an outer sheath (4) enclosing said inner sheath (3) ;characterized in that;
the first electrical phase conductors (1A1, 1A2, 1A3,...), the second electrical phase conductors (1B1, 1B2, 1B3,...) and the third electrical phase conductors (1C1, 1C2, 1C3, ...) have nearly identical cross-sections. - A cable (10) according to claim 1, wherein the conductors (1, 1A1, 1A2, 1A3..., 1B1, 1B2, 1B3..., 1C1, 1C2, 1C3..., 1G1, 1G2, 1G3) are formed from Copper or Aluminium or an alloy comprising Copper or Aluminium and/or the insulation layers (2) are made from a thermoplastic elastomer, a polyolefin polymer or a mixture comprising a thermoplastic elastomer or a polyolefin polymer.
- A cable (10) according to claim 1 or 2, wherein an antifriction tape, preferably formed from Teflon, is wrapped around each of the insulation layers (2) of the conductors (1, 1A1, 1A2, 1A3..., 1B1, 1B2, 1B3..., 1C1, 1C2, 1C3..., 1G1, 1G2, 1G3).
- A cable (10) according to claim 1, 2 or 3, wherein the inner sheath (3) consists of a plastic material, preferably a polyurethane material or a thermoplastic elastomeric material that protects the inner layers and conductors (1) against mechanical and chemical impact and/or the outer sheath (4) consists of a plastic material, preferably a polyurethane material or a thermoplastic elastomeric material that protects the inner layers and conductors (1) against mechanical and chemical impact.
- A cable (10) according to one of the claims 1 - 4, wherein the cable (10) further comprises at least one conductor pair (5), which is preferably centrally arranged within the cable (10), to transmit data or steering signals.
- A cable (10) according to one of the claims 1 - 4, wherein the cable (10) further comprises a tube (6), which is preferably centrally arranged within the cable (10), through which a cooling fluid can circulate to cool the cable.
- A cable (10) according to claim 6, wherein the tube (6) is watertight.
- A cable (10) according to one of the claims 1 - 7, wherein the cable (10) has a minimum bending radius of less than 10 times its diameter.
- A cable (10) according to one of the claims 1 - 8, wherein the cable (10) has a minimum bending radius of 300 millimetres.
- A cable (10) according to one of the claims 1 - 9, wherein the cable (10) further comprises a shielding layer and/or a reinforcing layer and/or an optical conductor and/or several grounding conductors (1G1, 1G2, 1G3, ...) .
- A cable (10) according to one of the claims 1 - 10, wherein the cable (10) can carry electric currents of 1000A or above.
- A cable (10) according to claim 11, wherein each individual conductor (1, 1A1, 1A2, 1A3..., 1B1, 1B2, 1B3..., 1C1, 1C2, 1C3..., 1G1, 1G2, 1G3) has an electric linear resistance of less than 1.40hms/km and/or the grounding conductors (1G1, 1G2, 1G3, ...) have the same cross-section as the first electrical phase conductors (1A1, 1A2, 1A3,...), the second electrical phase conductors (1B1, 1B2, 1B3,...) and the third electrical phase conductors (1C1, 1C2, 1C3,...).
- A system for supplying shore-to-ship electrical power to ships (50) docked in ports comprising a cable (10) according to one of the claims 1 - 12.
- A system according to claim 13, further comprising at least one support structure (20) over which the cable (10) is guided from the shore (40) to the ship (50).
- A system according to claim 13 or 14, further comprising at least one power supply unit (30) that is electrically connected to the cable (10) and based on the shore (40).
Priority Applications (1)
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EP20173810.1A EP3910650B1 (en) | 2020-05-11 | 2020-05-11 | System for supplying shore-to-ship electrical power to ships docked in port |
Applications Claiming Priority (1)
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EP20173810.1A EP3910650B1 (en) | 2020-05-11 | 2020-05-11 | System for supplying shore-to-ship electrical power to ships docked in port |
Publications (2)
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EP3910650A1 true EP3910650A1 (en) | 2021-11-17 |
EP3910650B1 EP3910650B1 (en) | 2023-01-25 |
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EP20173810.1A Active EP3910650B1 (en) | 2020-05-11 | 2020-05-11 | System for supplying shore-to-ship electrical power to ships docked in port |
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