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WO2024260568A1 - Système de transmission de puissance cc, et système de transmission de puissance cc sous-marin et procédé associés - Google Patents

Système de transmission de puissance cc, et système de transmission de puissance cc sous-marin et procédé associés Download PDF

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Publication number
WO2024260568A1
WO2024260568A1 PCT/EP2023/067172 EP2023067172W WO2024260568A1 WO 2024260568 A1 WO2024260568 A1 WO 2024260568A1 EP 2023067172 W EP2023067172 W EP 2023067172W WO 2024260568 A1 WO2024260568 A1 WO 2024260568A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
modular multilevel
multilevel converter
cable
terminals
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.)
Pending
Application number
PCT/EP2023/067172
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English (en)
Inventor
Jean-Marc Taillardat
Nicolas Lapassat
Christof Sihler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GE Energy Power Conversion Technology Ltd
Original Assignee
GE Energy Power Conversion Technology Ltd
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 GE Energy Power Conversion Technology Ltd filed Critical GE Energy Power Conversion Technology Ltd
Priority to PCT/EP2023/067172 priority Critical patent/WO2024260568A1/fr
Publication of WO2024260568A1 publication Critical patent/WO2024260568A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/36—Arrangements for transfer of electric power between AC networks via a high-tension DC link
    • 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
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

Definitions

  • TITLE DC power transmission system, and associated subsea DC power transmission system and method
  • the present invention concerns the transmission of electric power.
  • the present invention relates more particularly to a direct current (DC) power transmission system, a subsea DC power transmission system comprising the DC power transmission system, and a method for transmitting power in the power transmission system.
  • DC direct current
  • offshore platforms are used to extract oil or gas from a field of oil or gas, and comprise gas turbine to drive generators to supply the platforms with power and to drive compressors .
  • gas turbines are replaced by electric motors supplied by an onshore grid.
  • DC direct current
  • the motors of the platforms are connected to the onshore grid through a DC transmission system comprising an onshore AC/DC power converter supplied by an AC grid and supplying the DC subsea cable and a distribution offshore platform comprising an offshore DC/AC power converter supplied by the DC cable.
  • the distribution offshore platform is generally in the middle of the field and supplies the surrounding platforms of the field with AC voltages .
  • the DC/AC power converter of the distribution offshore platform may be designed to supply all the platforms of the field. Generally, the encumbrance of the DC/AC power converter is such that the distribution offshore platform does not extract gas or oil.
  • the building of the distribution offshore platform is time costly, complicated, and expensive.
  • a first group of the platforms extracting gas or oil of a field embedded electric motors run at a first frequency, for example 50 Hz
  • a second group of platforms extracting gas or oil of the said filed embedded electric motors run at a second frequency, for example 60 Hz.
  • each platform of the second group further embeds a frequency converter to convert the frequency of the AC currents delivered by the distribution platform.
  • the frequency converter integration on each platform of the second group reduces the space available for components used to extract gas or oil, the DC transmission system comprising the frequency converters .
  • a DC power transmission system comprising:
  • the power substation comprises a primary modular multilevel converter comprising AC terminals intended to be connected to a grid and DC terminals connected to the direct current cable.
  • Each power subsystem comprises a secondary transformer comprising a primary circuit and a secondary circuit intended to be connected to a load, and a secondary modular multilevel converter comprising AC terminals connected to the primary circuit of the secondary transformer and DC terminals connected to the direct current cable.
  • the direct current cable connects the DC terminals of the primary modular multilevel converter of the power substation and the DC terminals of the secondary modular multilevel converters of the plurality of power subsystems .
  • each modular multilevel converter of the primary modular multilevel converter and the plurality of secondary modular multilevel converters comprises N bridges extending between the DC terminals of said modular multilevel converter, N being an integer, each bridge comprising an upper arm and a lower arm connected in series through a connecting node, each connecting node being connected to an AC terminal, each upper and lower arm being composed of a plurality of submodules .
  • each submodule comprises a full bridge converter.
  • each submodule comprises a full bridge unipolar converter.
  • At least one power subsystem comprises a switch extending between the DC terminals of the secondary modular multilevel converter of the said power subsystem.
  • At least one power subsystem further comprises a disconnector switch connecting each end of the switch to the DC terminals of the secondary modular multilevel converter of the said power subsystem.
  • each power subsystem comprises a power controller, each power controller being configured to control the secondary modular multilevel converter of the said power subsystem to supply the load connected to the secondary circuit of the secondary transformer of the said subsystem from power delivered by the direct current cable or to control the secondary modular multilevel converter of the said power subsystem to supply the direct current cable with power from power generated by the load connected to the secondary circuit of the secondary transformer of the said subsystem.
  • the power substation comprises a general power controller configured to control the primary modular multilevel converter to supply the DC cable with power from the grid or to control the primary modular multilevel converter to supply the grid with power delivered by the DC cable.
  • the DC power transmission system further comprises a primary transformer comprising a primary circuit intended to be connected to the grid and a secondary circuit connected to the AC terminals of the primary modular multilevel converter.
  • the invention also relates to a subsea DC power transmission system comprising:
  • the onshore system comprising the power substation and the offshore system comprising the plurality of power subsystems .
  • the invention further relates to a method for transmitting power in a DC power transmission system, the power transmission system comprising:
  • the power substation comprises a primary modular multilevel converter comprising AC terminals connected to a grid and DC terminals connected to the direct current cable.
  • Each power subsystem comprises a secondary transformer comprising a primary circuit and a secondary circuit intended to be connected to a load, and a secondary modular multilevel converter comprising AC terminals connected to the primary circuit of the secondary transformer and DC terminals connected to the direct current cable, the direct current cable connecting the DC terminals of the primary modular multilevel converter of the power substation and the DC terminals of the secondary modular multilevel converters of the plurality of power subsystems .
  • the method comprises transferring power through the DC cable.
  • the value of a DC current in the DC cable is constant and equal to a predetermined value.
  • transferring power through the DC cable comprising controlling the primary modular multilevel converter to supply the plurality of power subsystems from power of the grid.
  • At least the secondary circuit of the secondary transformer of a power subsystem is connected to a first load generating power, transferring power through the DC cable comprises controlling the secondary modular multilevel converter of the said power subsystem to supply the DC cable with power generated by the first load.
  • At least the secondary circuit of the secondary transformer of another power subsystem is connected to a load, transferring power through the DC cable comprises controlling the secondary modular multilevel converter of the said another power subsystem to supply the load with power from the DC cable.
  • At least the secondary circuit of the secondary transformer of a power subsystem is connected to a first load generating power, transferring power through the DC cable comprises controlling the secondary modular multilevel converter of the said power subsystem to supply the DC cable with power generated by the first load and controlling the primary modular multilevel converter to supply the grid from power of the DC cable.
  • the secondary modular multilevel converter of at least one power subsystem comprises a switch extending between the DC terminals of the said secondary modular multilevel converter, the method further comprises closing the switch to stop operation of the secondary modular multilevel converter of the at least one power subsystem from the DC cable.
  • FIG. 1 illustrates schematically an example of an oil or gas field according to the invention
  • Figure 2 illustrates schematically an example of a primary modular multilevel converter according to the invention
  • Figure 3 illustrates schematically a first example of a submodule according to the invention
  • Figure 4 illustrates schematically a second example of a submodule according to the invention
  • Figure 5 illustrates schematically an example of a switching cell according to the invention
  • Figure 6 illustrates schematically a second mode of implementation of a power transmission system according to the invention
  • Figure 7 illustrates schematically a third mode of implementation of a power transmission system according to the invention.
  • Figure 1 illustrates schematically an example of an oil or gas field comprising offshore platforms 1 , 2 to extract oil or gas from the oil field or the gas field.
  • the oil or gas field may comprise more than two platforms 1 , 2 to extract oil or gas of the said field.
  • Each platform 1 , 2 comprises loads 3 , 4 to extract and to deliver oil or gas for example in a pipeline (not represented), the loads 3 , 4 being supplied with AC (alternative currents) currents .
  • Each load 3 , 4 may comprise for example an electric motor 5, 6 and a compressor 7 , 8 compressing oil or gas to inject compressed oil or gas in the pipeline (not represented), the electric motor 5, 6 driving the compressor 7, 8.
  • the electric motor 5, 6 may for example comprise a synchronous or an asynchronous electric machine.
  • Each platform 1 , 2 comprises a power subsystem 9, 10 supplying the load 3 , 4 with AC currents .
  • the power subsystems 9, 10 form an offshore system connected to an onshore system 1 1 with a direct current (DC) cable 12.
  • DC direct current
  • the onshore system 1 1 comprises a power substation 13 and a grid GRID .
  • the loads 3, 4 and/or the grid GRID have more or less than three phases .
  • the power substation 13 comprises a primary transformer 14 comprising a primary circuit connected to the triphase grid GRID .
  • the power substation 13 further comprises a primary modular multilevel converter 15 comprising AC terminals 16a, 16b, 16c connected to a secondary circuit of the primary transformer 14 and DC terminals 17a, 17b connected to the DC cable 12, and a general power controller 18 controlling the primary modular multilevel converter 15.
  • a primary modular multilevel converter 15 comprising AC terminals 16a, 16b, 16c connected to a secondary circuit of the primary transformer 14 and DC terminals 17a, 17b connected to the DC cable 12, and a general power controller 18 controlling the primary modular multilevel converter 15.
  • Each subsystem 9, 10 comprises a secondary transformer 19, 20, and a secondary modular multilevel converter 21 , 22 comprising AC terminals 21 a, 21b, 21c, 22a, 22b, 22c connected to a primary circuit of the secondary transformer 19, 20.
  • a secondary circuit of the transformer 19, 20 is connected to the load 3 , 4.
  • Each secondary modular multilevel converter 21 , 22 further comprises DC terminals 21 d, 21e, 22d, 22e connected to the DC cable, and a power controller 23 , 24 controlling the load 3 , 4.
  • the power controllers 23 , 24 of the power subsystems 9, 10 are connected to the general power controller 18 of the power substation 13 for example with an optical cable OPT to transmit data between the said controllers 18 , 23 , 24.
  • the direct current cable 12 connects the primary modular multilevel converter 15 of the power substation 13 and the DC terminals 21d, 21e, 22d, 22e the secondary modular multilevel converters 21 , 22 of the power subsystems 9, 10.
  • the power substation 13 , the power subsystems 9, 10, and the DC cable 12 form a power transmission system.
  • the primary modular multilevel converter 15 and the secondary modular multilevel converters 21 , 22 are controlled to transfer power through the DC cable.
  • At least one power subsystem 9, 10 may further comprise a switch 25, 26 or by pass switch extending between the DC terminals 21d, 21c, 22d, 22c of the secondary modular multilevel converter 21 , 22 of the power subsystem 9, 10.
  • the switch 25, 26 may be controlled by the power controller 23 , 24 and is open.
  • the power controller 23 , 24 closes the switch 25 , 26 to be able to stop operation of each power subsystem 9, 10 so that no power is transferred between the secondary modular multilevel converter 21 , 22 having the closed switch 25, 26 and the DC cable 12.
  • the switch 25, 26 may be closed if the power subsystem 9, 10 or the load 3 , 4 associated with the switch 25, 26 is defect, or during maintenance operation of the power subsystem 9, 10.
  • At least one power subsystem 9, 10 may further comprise a disconnector switch 45, 46 connecting each end of the switch 25, 26 to the DC terminals 21d, 21c, 22d, 22c of the secondary modular multilevel converter 21 , 22 of the said power subsystem 9, 10.
  • the disconnector switch 45, 46 of the power subsystems 9, 10 may be controlled by the power controller 23 , 24 and is closed.
  • the disconnector switch 45, 46 of the said the power subsystems 9, 10 is opened to disconnect the secondary modular multilevel converter 21 , 22 from the direct current cable 12 for example to perform maintenance operation.
  • the offshore system and the onshore system comprising the power transmission system form a subsea DC power transmission system.
  • the power transmission system may be implemented for other applications than for subsea DC power transmission system to transfer power between the primary modular multilevel converter 15 , and the secondary modular multilevel converters 21 , 22.
  • figure 2 illustrated schematically an example of the primary modular multilevel converter 15.
  • the primary modular multilevel converter 15 comprises N bridges 27, 28, 29 extending between the DC terminals 17a, 17b, N being an integer equal to the number of phases of the grid GRID .
  • Each bridge 27 , 28, 29 comprises an upper arm 27a, 28a, 29a and a lower arm 27b, 28b, 29b connected in series through a connecting node 27c, 28c, 29c.
  • Each connecting node 27c, 28c, 29c is connected to an AC terminal 16a, 16b, 16c of the primary modular multilevel converter 15.
  • Each upper arm 27a, 28a, 29a and lower arm 27b, 28b, 29b comprises a same number of submodules 30 and an inductor 31.
  • Each submodule 30 comprises a first end 30a and a second end 30b.
  • each upper arm 27a, 28a, 29a and lower arm 27b, 28b, 29b are connected in series so that a first end 30a of a submodule 30 of an arm is connected to the second end 30b of an adj acent submodule 30 of the said arm.
  • the end of a first submodule 30 which is not connected to another submodule 30 is connected to a first end of the inductor 31 of the said arm.
  • Each submodule 30 is controlled by the general power controller 18 and is designed to withstand a predetermine voltage, for example 2500 V, and to store a predetermined amount of energy.
  • the number of submodules 30 of the upper and lower arms of each bridge is determined so that the maximal voltage between the DC terminals 17a, 17b is equal to the number of submodules 30 in series inside the upper and lower arms 27a and 27b, 28a and 28b, 29a and 29b multiplied by the predetermined voltage.
  • the number of submodules 30 of the bridges of the secondary modular multilevel converters 21 , 22 and the primary modular multilevel converter 15 depends on the maximal voltage between the DC terminals of the converters 15, 21 , 22, the number of submodules 30 of the bridges of the secondary modular multilevel converters 21 , 22 and the primary modular multilevel converter 15 may be different.
  • the number of submodules 30 of the bridges of the primary modular multilevel converter 15 is determined according to the voltage between the DC terminals 21 d, 21 e, 22d, 22e of the secondary modular multilevel converters 21 , 22 as exposed in the following.
  • Additional submodules 30 may be added in each arm to provide redundancy and increase the availability in case of a faulty module.
  • Figure 3 illustrates schematically a first example of a submodule 30 comprising a full bridge converter.
  • the full bridge converter comprises four switching cells 31 , 32, 33 , 34 comprising a first end 31 a, 32a, 33a, 34a, a second end 31b, 32b, 33b, 34b, and a control input 31c, 32c, 33c, 34c connected to the. general power controller 18.
  • the full bridge converter further comprises a power storage mean comprising for example a capacitor 35.
  • the first end 3 1 a, 32a of a first and a second switching cells 31 , 32 is connected to a first end of the capacitor 35, and the second end 33b, 34b of a third and the fourth switching cells 33 , 34 is connected to the second end of the capacitor 35.
  • the second end 31b of the first switching cell 31 and the first end 33a of the third switching cell 33 are connected to the first end 30a of the submodule 30.
  • the second end 32b of the second switching cell 31 and the first end 34a of the fourth switching cell 34 are connected to the second end 30b of the submodule 30.
  • Figure 4 illustrates schematically a second example of a submodule 30 comprising a full bridge unipolar converter.
  • the full bridge converter comprises two switching cells 36, 37 comprising a first end 36a, 37a, a second end 36b, 37b, and a control input 36c, 37c connected to the general power controller 18.
  • the full bridge converter further comprises two diodes 38, 39 and a power storage mean comprising for example a capacitor 40.
  • the first end 36a of a first second switching cell 36 and the cathode of a first diode 38 are connected to a first end of the capacitor 40, and the second end 37b of the second switching cell 37 and the anode of the second diode 39 are connected to the second end of the capacitor 40.
  • the second end 36b of the first switching cell 36 and the cathode of the second diode 39 are connected to the first end 30a of the submodule 30.
  • the first end 37a of the second switching cell 37 and the anode of the first diode 38 are connected to the second end 30b of the submodule 30.
  • Figure 5 illustrates schematically an example of the switching cell 3 1 , 32, 33 , 34, 36, 37.
  • the switching cell comprises a diode 41 and a transistor 42.
  • the transistor 42 may be a filed effect transistor, for example an insulated-gate bipolar IGBT transistor.
  • the drain D of the transistor 42 and the cathode of the diode 41 are connected to the first end 31 a, 32a, 33a, 34a, 36a, 37a of the switching cell 31 , 32, 33 , 34, 36, 37 , and the source S of the transistor 42 and the anode of the diode 41 are connected to the second end 3 1b, 32b, 33b, 34b, 36b, 37b of the switching cell 3 1 , 32, 33 , 34, 36, 37.
  • the gate G of the transistor 42 is connected to the control input 31c, 32c, 33c, 34c, 36c, 37c of the switching cell 31 , 32, 33 , 34, 36, 37.
  • the general power controller 18 and the power controllers 23 , 24 may implement a Pulse Width Modulation (PMW) algorithm to control the transistors 42.
  • PMW Pulse Width Modulation
  • the secondary modular multilevel converters 21 , 22 and the primary modular multilevel converter 15 work without loss . It is assumed that the load 3 connected to the secondary modular multilevel converter 21 of a first power subsystem 9 is supplied by a power P3 delivered by the AC terminals 21 a, 21b, 21 c so that: where U21 is the voltage of each AC terminal 21 a, 21b, 21c, I21 is the current of each AC terminal 21 a, 21b, 21c, and (p2i is the phase shift between the voltage U21 and the current I21 .
  • the load 4 connected to the secondary modular multilevel converter 22 of the second power subsystem 10 is supplied by a power P4 delivered by the AC terminals 22a, 22b, 22c so that: where U22 is the voltage of each AC terminal 22a, 22b, 22c, I22 is the current of each AC terminal 22a, 22b, 22c, and cp22 is the phase shift between the voltage U22 and the current I22.
  • the secondary modular multilevel converter 21 is supplied by a power P21 delivered by the DC cable 12 so that
  • Udg is the voltage between the DC terminals 21d, 21e of the secondary modular multilevel converter 21 of the first power subsystem 9
  • I13 is the DC current flowing in the DC cable 12.
  • the DC voltage Udg is regulated by the controller 23 to enable balance of active power between DC side and AC side.
  • the secondary modular multilevel converter 22 is supplied by a power P22 delivered by the DC cable 12 so that P22 — Ud 1Q ⁇ / 13 (4) where Udio is the voltage between the DC terminals 22d, 22e of the secondary modular multilevel converter 22 of the second power subsystem 10.
  • the DC voltage Udio is regulated by the controller 23 to enable balance of active power between DC side and AC side.
  • each bridge of the secondary modular multilevel converter 21 of a first power subsystem 9 comprises a plurality of submodules controlled by the controller 23 so that the voltage between the DC terminals 21d, 21e of the first power subsystem 9 is equal to the value of the voltage Udg
  • each bridge of the secondary modular multilevel converter 22 of the second power subsystem 10 comprises a plurality of submodules controlled by the controller 24 so that the voltage between the DC terminals 22d, 22e of the second power subsystem 10 is equal to the value of the voltage Udio.
  • the power controller 23 controls the transistors 42 of the secondary modular multilevel converter 21 of the first power subsystem 9 so that:
  • the general power controller 18 controls the primary modular multilevel converter 15 of the power substation 13 so that the DC cable supplied by the primary modular multilevel converter 15 supplies the power subsystems 9, 10 with power of the grid GRID.
  • the voltage Udi3 is regulated to supply the predetermined DC current I13.
  • the expected value of the voltage Udi3 is determined according to equation (8)
  • the primary modular multilevel converter 15 delivers the DC current I13 in the DC cable 12 so that the value of the DC current I13 is constant and equal to a predetermined value, for example 900A.
  • a predetermined value for example 900A.
  • the DC current 113 shall be set at its maximum value.
  • the DC current Ii 3 may be to half of its maximum value to optimize the losses .
  • the predetermined DC current I13 in the DC cable 12 is set according to the life cycle of the oil or gas field.
  • the power controller 23 controls the transistors 42 of the secondary modular multilevel converter 21 of the first power subsystem 9 so that the voltage Ud 9 between the DC terminals 21d, 21e is equal to:
  • the power controller 24 controls the transistors 42 of the secondary modular multilevel converter 22 of the second power subsystem 10 so that the voltage Ud lO between the DC terminals 22d, 22e is equal to :
  • the value of the DC current Id 13 may be decreased to reduce the losses generated by the DC current Id 13 in the DC cable 12.
  • the subsea DC power transmission system supplying the loads 3, 4 and comprising the power transmission system does not comprise a platform dedicated to power conversion on the contrary of a DC power transmission system known from the prior art.
  • each load 3 , 4 is supplied by a dedicated secondary modular multilevel converter 21 , 22, if the loads 3 , 4 are supplied with different current frequency, the secondary modular multilevel converters controlled by the power controllers 23 , 24 deliver AC currents at the frequency required by the loads .
  • the secondary modular multilevel converters 21 , 22 enable to supply the loads 3 , 4 with low harmonics content and with first harmonics generated at high frequencies, enabling an implementation without AC filters, or at least with small AC filter filtering, enabling a gain in volume.
  • Figure 6 illustrates schematically a second mode of implementation of the power transmission system.
  • the load 3 is disconnected from the first power subsystem 9.
  • the load 3 of the first platform may be disassemble and assemble on another platform.
  • a first load generating power may be electrically connected to the first power subsystem 9 in place of the load 3.
  • the first load may be one or more wind turbines 50.
  • the power controller 23 of first power subsystem 9 controls the secondary modular multilevel converter 21 of the first power subsystem 9 so that the power generated by the first load supplies the DC cable 12 to reduce the power delivered by the grid GRID, the generated power by the first load being consumed by the load 4 connected to the second power subsystem 10.
  • the power controller 23 of the first power subsystem 9 transmits the amount of power generated by the first load to the general power controller 18 through the optical cable OPT so that the primary modular multilevel converter 15 delivers less power.
  • the general power controller 18 controls the primary modular multilevel converter 15 to supply the grid GRID with the generated power.
  • Figure 7 illustrates schematically a third mode of implementation of the power transmission system.
  • loads 3 , 4 may be replaced by first loads comprising for example wind turbines 50.
  • the power controllers 23 , 24 of the power subsystems 9, 10 control the secondary modular multilevel converters 21 , 22 of the power subsystems 9, 10 so that the power generated by the first loads supplies the DC cable 12, and transmit the amount of power generated by the first loads to the general power controller 18 through the optical cable OPT so that the primary modular multilevel converter 15 supplies the grid GRID with power.
  • the architecture of the power transmission system comprising the secondary modular multilevel converters permits to supply independently loads connected to the secondary modular multilevel converters from the DC cable.
  • secondary modular multilevel converters may be connected to loads generating power so that the secondary modular multilevel converters supply the DC cable with the generated power.
  • platforms may be used to supply the DC cable with power when the exploitation of the oil or gas field is finished permitting to reuse the platforms .
  • new power subsystems may be easily connected to the DC cable or power subsystems may be easily disconnected from the DC cable, the power transmission system being modular.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

Un système de transmission de puissance comprend : - une sous-station de puissance (13), - une pluralité de sous-systèmes de puissance (9, 10), et - un câble à courant continu (12). La sous-station d'alimentation comprend un convertisseur multiniveau modulaire primaire (15). Chaque sous-système d'alimentation (9, 10) comprend un transformateur secondaire (19, 20) et un convertisseur multiniveau modulaire secondaire (21, 22), le câble à courant continu (12) connectant le convertisseur multiniveau modulaire primaire de la sous-station d'alimentation et les convertisseurs multiniveaux modulaires secondaires de la pluralité de sous-systèmes d'alimentation en série.
PCT/EP2023/067172 2023-06-23 2023-06-23 Système de transmission de puissance cc, et système de transmission de puissance cc sous-marin et procédé associés Pending WO2024260568A1 (fr)

Priority Applications (1)

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PCT/EP2023/067172 WO2024260568A1 (fr) 2023-06-23 2023-06-23 Système de transmission de puissance cc, et système de transmission de puissance cc sous-marin et procédé associés

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PCT/EP2023/067172 WO2024260568A1 (fr) 2023-06-23 2023-06-23 Système de transmission de puissance cc, et système de transmission de puissance cc sous-marin et procédé associés

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8044537B2 (en) * 2006-06-28 2011-10-25 Abb Technology Ltd. Modular HVDC converter
US8994206B2 (en) * 2013-01-14 2015-03-31 Abb Technology Ag Turbine-based energy generation system with DC output
US20160036221A1 (en) * 2014-07-31 2016-02-04 Abb Technology Ag Dc connection system for renewable power generators
EP4138250A1 (fr) * 2020-04-17 2023-02-22 Universitat Jaume I Procédé d'énergisation de convertisseurs mmc et liaison continue ccht pour le démarrage de centrales de production électrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8044537B2 (en) * 2006-06-28 2011-10-25 Abb Technology Ltd. Modular HVDC converter
US8994206B2 (en) * 2013-01-14 2015-03-31 Abb Technology Ag Turbine-based energy generation system with DC output
US20160036221A1 (en) * 2014-07-31 2016-02-04 Abb Technology Ag Dc connection system for renewable power generators
EP4138250A1 (fr) * 2020-04-17 2023-02-22 Universitat Jaume I Procédé d'énergisation de convertisseurs mmc et liaison continue ccht pour le démarrage de centrales de production électrique

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