WO2015090502A1 - Système de distribution de puissance sous-marin modulaire - Google Patents

Système de distribution de puissance sous-marin modulaire Download PDF

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Publication number
WO2015090502A1
WO2015090502A1 PCT/EP2014/003109 EP2014003109W WO2015090502A1 WO 2015090502 A1 WO2015090502 A1 WO 2015090502A1 EP 2014003109 W EP2014003109 W EP 2014003109W WO 2015090502 A1 WO2015090502 A1 WO 2015090502A1
Authority
WO
WIPO (PCT)
Prior art keywords
core
distribution system
transformer
power distribution
subsea power
Prior art date
Application number
PCT/EP2014/003109
Other languages
English (en)
Inventor
Wojciech Piasecki
Marcin Szewczyk
Radoslaw Nalepa
Brice Jamieson
Original Assignee
Abb Technology Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Abb Technology Ag filed Critical Abb Technology Ag
Publication of WO2015090502A1 publication Critical patent/WO2015090502A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Definitions

  • the subject of the invention is a modular subsea power distribution system to which many individual subsea load units may be connected.
  • the invention is particularly useful in subsea power distribution systems in which the electrical power must be supplied to multiple subsea load units located under water.
  • connections to the distribution system are usually made with electrical connectors rated for the power needed in the particular load.
  • the majority of subsea loads connected to the distribution unit are subsea pumps and compressors driven by Variable Speed Drives (VSD) equipped with front-end transformers adjusting the VSD's voltage level to the voltage level of the distribution system.
  • VSD Variable Speed Drives
  • An example of a practical implementation of such a system is the SEPDIS subsea distribution system, described in ABB Review, 2/2000, "Controlled subsea electric power distribution with SEPDIS".
  • connectors are dry-mateable then the potential replacement of a load unit in the case of its failure is not possible underwater. Connection/disconnection under water can only be performed in the instance where wet-mateable connectors are used. Such connectors exist for AC MV distribution but they are very bulky, heavy and costly devices.
  • a modular subsea power distribution system having at least two load units connected to a single base module through a connection element and the base module is equipped with a switch gear unit in which breakers are located having their output terminals electrically connected with the load through a connection element providing galvanic energy transfer from the base module to the load units.
  • a connection element Due to the installation and service requirements such a connection element must be of a wet-mateable type which means that connection or disconnection process must be possible under water.
  • Wet-mateable power galvanic connectors, especially for medium voltage power applications are complicated and prone to failures due to a potential of water ingress through a complex sealing system.
  • Galvanic-less power transfer using the inductive coupling principle is typically based on a special transformer design with separable parts as shown e.g. in US patent US 4,030,058.
  • the solution presented in this invention has a split C-core transformer where the primary and secondary core sections of the core form an inductive coupler. The separable sections are secured within separate sealed containments in intimate contact with a thin, nonmagnetic portion of respective containments which permits inductive coupling and decoupling of the primary and secondary core sections in corrosive fluid environments such as sea water.
  • the sealed containments isolate the core sections from contact with the corrosive environment thus permitting the use of efficient magnetic materials such as laminated transformer steel.
  • the primary and the secondary section of the split core are positioned in their separate sealed containments in such a way that pole faces of the C-core transformer are situated in intimate contact and between the pole faces a gap with the thin, non-magnetic portion of respective containments is presented.
  • GB167615 there is known a subsea connector with ferromagnetic fluid filing.
  • the connector comprises a male and female parts, both having a ferromagnetic cores on which the windings are wound.
  • This connector is designed in such a way that the contact area between the adjacent male and female parts is as large as possible.
  • the portion of the male part for insertion, the ferrite core is shaped as two concentric cylindrical walls, while the cavity of the female part is correspondingly shaped, i.e. as two concentric hollow cylinder or deep circular grooves.
  • the magnetic flux must pass through two coupling surfaces so that the course of the flux must past through the windings from one coupling surface to the next.
  • the outer side of the external and the inner side of the internal cylinder wall represent the contact surface.
  • the windings After connecting the male and female part the windings are arranged concentrically with respect to the symmetry axis of the connecting element, but they are displaced along this axis as they are situated outside the contacting area of the cores.
  • the presence of the ferromagnetic fluid between the adjacent core members reduces the magnetic resistance of the transformer core but the efficiency of energy transfer between the primary and secondary windings is negatively affected by the physical displacement since the leakage inductances of the windings is large.
  • the presented invention does not teach how to construct a split-core transformer having a closed magnetic core for subsea energy transfer in which the primary and secondary winding are arranged concentrically and located one within the other.
  • US2007/0141887 describing a waterproof power connector having the male member with a magnetic core and a winding surrounded the core.
  • the female member includes a winding and has a hollow for receiving the male member.
  • the induced magnetic flux is coupled to the female member winding, which accordingly induces current in the female member.
  • one part of the connector comprises a magnetic core which is placed in the male member and after connection both male and female members and both windings are placed coaxially one within the other.
  • the magnetic core member is located centrally within the mated parts forming an open magnetic core. This type of a core is applicable in practice only to inductive couplers operating at high frequency. It is thus not applicable to power transmission and distribution systems typically operating at 50/60Hz.
  • None of the presented inventions teaches how to build a subsea power distribution system in which the power from the switchgear unit is distributed to multiple load units by means of galvanic-less connectors based on the inductive energy transfer, in which the magnetic core is closed after the mating operation and the primary and secondary windings are arranged co-axially and one within the other so that the energy transfer can be facilitated at high efficiency when the system is operated at low frequency (50/60 ' Hz)
  • connection element is a split core transformer having a core divided into a first part of the core and a second part of the core.
  • the first part of the core together with primary windings of a transformer is permanently attached to the base module.
  • the second part of the core together with secondary windings of a transformer is permanently attached to the load unit.
  • the primary windings and secondary windings of the split core transformer are situated coaxially one within the other when the load unit is connected to the base module and at the same time the first part of the core and the second part of the core form closed magnetic core.
  • first part and the second part of the core of the split core transformer are made of a soft magnetic material which is resistant to corrosion.
  • the first part and the second part of the core of the split core transformer each have a protective coating placed on the external surfaces of said parts.
  • the protective coating is made of a hydrophobic epoxy resin.
  • the load unit and/or the base module are equipped with enclosure(s) permanently attached to its(their) external surface(s).
  • an internal space of the enclosure(s) has a form of a compartment where the split core transformer is placed while being in the connected state
  • the compartment where the split core transformer is placed is filled with sea water.
  • the compartment where the split core transformer is placed is filled with a dielectric liquid.
  • the primary and secondary windings are encapsulated in a dielectric material.
  • the advantages of the invention is the elimination of wet-mateable galvanic connectors between a base module of the distribution system and the load units, which increases the reliability and simplifies the construction of the modular distribution system to which many load units, especially in the form of Variable Speed Drives (VSDs), are connected by means of standardized, galvanic-less connectors based on the inductive coupling principle.
  • VSDs Variable Speed Drives
  • the function of a power connector and the transformer typically reducing the distribution system voltage to that required by the VSD are combined in a single device.
  • Coaxial arrangement of the primary and secondary windings of the split-core transformer, which are located one within the other facilitates efficient energy transfer.
  • the presented galvanic-less connectors are separate modular units. It would be of significant advantage to provide a distribution unit which outputs power at a limited number of defined levels, to which any number of loads may be easily connected without the use of
  • Fig. 1 - shows a schematic diagram of the subsea transmission and distribution system
  • Fig. 2 - shows a connecting element in the form of a split-core transformer, shown as a cross section of two legs of a triangular core three phase transformer, in the disconnected state in the first embodiment of the invention
  • Fig. 3 shows a connecting element in the form of a split-core transformer shown, as a cross section of two legs of a triangular core three phase transformer, in the connected state in the first embodiment of the invention
  • Fig. 4 - shows a connecting element shown, as a cross section, with the connecting element housing in the disconnected state in the second embodiment of the invention
  • Fig. 5 shows a connecting element shown, as a cross section, in the connected state with the connecting element housing, forming the connecting element compartment in the second embodiment of the invention.
  • a subsea modular distribution system 1 is connected to a three-phase AC transmission system comprising a subsea step-down transformer 2 using AC medium-voltage connecting elements 3 and 4.
  • the high-voltage side of the transformer 2 is supplied from an on-shore AC grid 5 using an HV AC transmission cable 6, connected to the transformer 2 using AC high voltage connecting element 4.
  • the medium-voltage side of the transformer 2 is connected with the distribution system 1 through a connecting element 3.
  • the distribution system 1 comprises a single base module 7 in which a switchgear unit 8 is located.
  • the switchgear unit 8 comprises at least two circuit breakers 9 through which power is supplied to the load units 10.
  • the switchgear unit 8 comprises four circuit breakers 9 and the load units 10 are Variable Speed Drives (VSD) supplying power to the subsea loads in the form of electrical motors M.
  • VSD Variable Speed Drives
  • the connection between the base module 7 and each of the load units 10 is realized by means of a connecting element 1 1 in the form of a split- core transformer 1 1 ' having two separable core parts first 12a and second 12b.
  • a protective coating is placed on the external surfaces of each of the parts 12a and 12b.
  • the protective coating is made of a hydrophobic epoxy resin.
  • the core is made of corrosion-free magnetic material.
  • the primary windings 13a of the transformer 11 ' and the first part 12a of the split-core transformer core 1 1 ' are permanently attached to the base module 7 and the electrical connections between the outputs of the circuit breakers 9 and the primary windings 13a of the split core transformer 1 ' are made during the assembly process of the base module 7, before submersing the unit.
  • the secondary windings 13b of the transformer 11 ' and the second part 12b of the split-core transformer core 1 ' are permanently attached to load unit 10.
  • the electrical connections between the secondary windings 13b of the split core transformer 1 1 ' and the input circuits of the load unit 10 are made during the assembly process of the load unit 10, before submersing the load unit.
  • the load unit 10 and the base unit 7 are thus separable units where each of them is preferably filled with an insulating liquid (e.g. oil) and each of the units is pressure compensated against the ambient pressure.
  • an insulating liquid e.g. oil
  • the connecting element 1 1 in the first embodiment of the invention has a form of a split core transformer 1 1 ' that is presented in fig.2 in the disconnected state.
  • the transformer 11 ' may be a single phase or a three phase transformer.
  • the split core transformer 11 ' is a 3-phase, three legged unit but on fig. 2 only a cross-section of a part of the transformer comprising two legs and windings of two phases is depicted for illustration purposes.
  • the first part of the transformer core 12a in the form of a bar forming a core yoke, is permanently attached to the base module 7 together with the transformer primary windings 13a.
  • the connecting element in the connected state is shown in fig. 3.
  • the primary and secondary windings 13a and 13b are encapsulated in a dielectric material such as a hydrophobic epoxy resin.
  • the first part of the core 12a and the second part of the core 2b form closed magnetic core 12.
  • the load 10 is equipped with an enclosure 14.
  • the enclosure 14 is permanently attached to the external surface of the load 10 forming a compartment 15 placed between the load 10 and an external surface of the base module 7.
  • the compartment 15 together with the surface of the base module 7 forms an additional connecting element between the load 10 and the base module 7.
  • the connecting element is in the connected state, as illustrated in fig. 5 the enclosure 14 is in close proximity to the base module 7.
  • the compartment 15 may remain open and filled by sea water.
  • the interface between the enclosure 14 and the base module 7 may be hermetically closed by a sealing system, not shown in the drawing wherein, after completion of the mating process, sea water in the compartment 15 may be replaced by a dielectric liquid. This requires additional fluid exchanging accessories, not shown in the drawing.
  • the enclosure 14 may be attached to the load unit, as shown in the example, but alternatively it may be a part of the base module 7 or it may be composed of two separate elements of which the first is attached to the base module 7 and second is attached to the load unit 10, what is not presented in the drawing.
  • the load unit 10 in order to perform the connection of the load unit 10 to the base unit 7, the load unit 10 is mechanically positioned on the base module 7 so that the two parts of the split core transformer 1 or 11" are mated. This positioning may be facilitated by additional guiding elements, not shown in the drawing.
  • the mating closes the magnetic circuit of the split core transformer 1 171 1 " and provides a magnetic flux path enhancing inductive coupling between the primary and secondary windings 13a and 13b.
  • the primary and secondary windings 13a and 13b in the connected state are located coaxiaily, one within the other in order to minimize the leakage inductance of the split core transformer 1 171 1 ".
  • the transformer core could be of any known type, such as a conventional 3-legged E-l core or 5-legged (what is not presented in the drawing), or triangular - shape providing the most compact design.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

L'objet de l'invention est un système de distribution de puissance sous-marin modulaire auquel de nombreuses unités de charge sous-marines individuelles peuvent être connectées. Un système de distribution de puissance sous-marin modulaire (1) comprend : un module de base (7), auquel une unité de charge (10) est connectée par un élément de connexion (11) ayant une forme d'un transformateur-pince (11'/11'') dont les bobinages primaires (13a) et une première partie du noyau (12a) sont fixés de manière permanente au module de base (7), et les bobinages secondaires (13b) et une seconde partie du noyau (12b) sont fixés de manière permanente à l'unité de charge (10). L'invention est caractérisée par le fait que les bobinages primaires (13a) et les bobinages secondaires (13b) du transformateur-pince (11'/11'') sont situés de manière coaxiale les uns à l'intérieur des autres lorsque l'unité de charge (10) est connectée au module de base (7) et dans le même temps la première partie du noyau (12a) et la seconde partie du noyau (12b) forment un noyau magnétique fermé (12).
PCT/EP2014/003109 2013-12-16 2014-11-18 Système de distribution de puissance sous-marin modulaire WO2015090502A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13460083.2 2013-12-16
EP13460083 2013-12-16

Publications (1)

Publication Number Publication Date
WO2015090502A1 true WO2015090502A1 (fr) 2015-06-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/003109 WO2015090502A1 (fr) 2013-12-16 2014-11-18 Système de distribution de puissance sous-marin modulaire

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK201670190A1 (en) * 2016-03-31 2017-10-09 A P Møller - Mærsk As Boat with connection to shore
FR3051961A1 (fr) * 2016-05-31 2017-12-01 M Prime Innovation Dispositif de connexion sous-marine et procede d'assemblage correspondant

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB167615A (en) 1920-05-20 1921-08-18 Henry Leitner Improvements in electric accumulators or secondary batteries
US4030058A (en) 1976-03-30 1977-06-14 Westinghouse Electric Corporation Inductive coupler
GB2104305A (en) 1981-05-20 1983-03-02 British Underwater Pipeline Improvements in or relating to the introduction of liquids into underwater cavities
GB2167615A (en) * 1984-11-26 1986-05-29 Norske Stats Oljeselskap Subsea connector with ferromagnetic fluid filling
WO2007055587A1 (fr) 2005-11-11 2007-05-18 Norsk Hydro Produksjon A.S Systeme et ensemble sous-marin d'alimentation sans coupure
US20070141887A1 (en) 2005-12-19 2007-06-21 Industrial Technology Research Institute Waterproof power connector
WO2007071266A1 (fr) 2005-12-19 2007-06-28 Siemens Aktiengesellschaft Systeme d’alimentation electrique pour systeme sous-marin
EP2447962A1 (fr) * 2010-11-01 2012-05-02 Nexans Système de connecteur de puissance sous-marin et son utilisation
WO2012164029A2 (fr) 2011-06-01 2012-12-06 Total Sa Architectures électriques sous-marines
US20130170258A1 (en) * 2011-12-30 2013-07-04 Maxim Integrated Products, Inc. Electromagnetic connector

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB167615A (en) 1920-05-20 1921-08-18 Henry Leitner Improvements in electric accumulators or secondary batteries
US4030058A (en) 1976-03-30 1977-06-14 Westinghouse Electric Corporation Inductive coupler
GB1538410A (en) * 1976-03-30 1979-01-17 Westinghouse Electric Corp Underwater decoupling transformer
GB2104305A (en) 1981-05-20 1983-03-02 British Underwater Pipeline Improvements in or relating to the introduction of liquids into underwater cavities
GB2167615A (en) * 1984-11-26 1986-05-29 Norske Stats Oljeselskap Subsea connector with ferromagnetic fluid filling
WO2007055587A1 (fr) 2005-11-11 2007-05-18 Norsk Hydro Produksjon A.S Systeme et ensemble sous-marin d'alimentation sans coupure
US20070141887A1 (en) 2005-12-19 2007-06-21 Industrial Technology Research Institute Waterproof power connector
WO2007071266A1 (fr) 2005-12-19 2007-06-28 Siemens Aktiengesellschaft Systeme d’alimentation electrique pour systeme sous-marin
EP2447962A1 (fr) * 2010-11-01 2012-05-02 Nexans Système de connecteur de puissance sous-marin et son utilisation
WO2012164029A2 (fr) 2011-06-01 2012-12-06 Total Sa Architectures électriques sous-marines
US20130170258A1 (en) * 2011-12-30 2013-07-04 Maxim Integrated Products, Inc. Electromagnetic connector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK201670190A1 (en) * 2016-03-31 2017-10-09 A P Møller - Mærsk As Boat with connection to shore
FR3051961A1 (fr) * 2016-05-31 2017-12-01 M Prime Innovation Dispositif de connexion sous-marine et procede d'assemblage correspondant

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