WO2021043912A1 - System and method for balancing power in an offshore renewable power system - Google Patents

System and method for balancing power in an offshore renewable power system Download PDF

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Publication number
WO2021043912A1
WO2021043912A1 PCT/EP2020/074615 EP2020074615W WO2021043912A1 WO 2021043912 A1 WO2021043912 A1 WO 2021043912A1 EP 2020074615 W EP2020074615 W EP 2020074615W WO 2021043912 A1 WO2021043912 A1 WO 2021043912A1
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WIPO (PCT)
Prior art keywords
power
electrolysis
monitoring
balancing
electrolysis device
Prior art date
Application number
PCT/EP2020/074615
Other languages
French (fr)
Inventor
Svein Kjenner
Fredrik J. ØSTHEIM
Andreas LØVLI
Marit Mork
Jon Thoresen
Olve Mo
Magnus S. THOMASSEN
Original Assignee
Fmc Kongsberg Subsea As
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Application filed by Fmc Kongsberg Subsea As filed Critical Fmc Kongsberg Subsea As
Publication of WO2021043912A1 publication Critical patent/WO2021043912A1/en

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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
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • 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
    • H02J15/00—Systems for storing electric energy
    • H02J15/008—Systems for storing electric energy using hydrogen as energy vector
    • 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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • 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
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/42—The network being an on-board power network, i.e. within a vehicle for ships or vessels
    • 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
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Definitions

  • the invention relates to a power balancing system and method for balancing power in an offshore renewable power system.
  • the present disclosure provides a power balancing system for balancing power in an offshore renewable power system, the power balancing system comprising a power input connected to a power source; a power output to a power consuming grid; powered by the power input; at least one electrolysis device powered by the power input; a monitoring device, configured to monitor the power input from the power source and/or the power output to the power consuming grid, and a control device, configured to, based on the result of the monitoring, controlling an operation of the at least one electrolysis device.
  • the at least one electrolysis devices may comprise a first and a second electrolysis device, and the control device may be configured to, based on the result of the monitoring performed by the monitoring device, control an operation of the first and the second electrolysis devices.
  • the control device may be configured to control the operation of the first and/or the second electrolysis devices in order to balance the active power supplied at the power input.
  • the power source may include an intermittent, renewable power source.
  • the renewable power source may include at least one wind turbine.
  • the at least one electrolysis device may include a water electrolysis device configured for producing hydrogen.
  • the control device may be configured to monitor a load of at first electrolysis device and to decide whether to engage a second electrolysis device based on the load of the first electrolysis device.
  • the control device may further be configured to perform a load sharing between the first and the second electrolysis devices.
  • the power balancing system may further comprise a battery and/or a capacitor bank for improving power balancing.
  • the system may, in addition to said at least one electrolysis device, comprise at least one pump connected to the power input.
  • Said at least one pump may be a heat pump or a fluid circulation pump, e.g. a pump in a seawater treatment system.
  • the system may be configured to engage, in addition to the at least one electrolysis device, the at least pump to contribute to balancing power in the system.
  • a heating system there is generally some flexibility in allowed heating fluid temperature and/or flow rate that can be utilized to allow pumps to be engaged and disengaged to provide power balancing or at least contribute to such balancing.
  • available water tank capacity can be utilized in a similar manner, i.e. by engaging and disengaging water pumps to contribute to the power balancing.
  • the present disclosure provides a method for balancing power in an offshore renewable power system, comprising the steps of:
  • the at least one electrolysis devices may comprise a first and a second electrolysis device, and the step of controlling, by the control device, may include controlling an operation of the first and the second electrolysis devices based on the result of the monitoring.
  • the step of controlling, by the control device may include controlling the operation of the first and/or the second electrolysis devices in order to balance the active power supplied at the power input.
  • the power source may include an intermittent, renewable power source, wherein the renewable power source may include at least one wind turbine.
  • the at least one electrolysis device may include a water electrolysis device configured to produce hydrogen.
  • Said step of controlling, by the control device may include monitoring a load of a first electrolysis device and deciding whether to engage a second electrolysis device based on the load of the first electrolysis device.
  • the method may further comprise performing, by the control device, a load sharing between the first and the second electrolysis devices.
  • the method may further comprise improving power balancing by means of a battery and/or a capacitor bank, e.g. by providing capacitive capacity from the battery and/or a capacitor bank.
  • Figure 1 is a schematic graph illustrating an exemplary control of a first and second electrolysis devices in accordance with principles of the invention.
  • two or more electrolyzers, or electrolysis devices are used in the effort of balancing the active power supplied in a renewable energy application where traditional ways of balancing active power, like batteries and rotating mass, are not possible or preferable.
  • electrolyzers can be a supplement to the power quality control. This is achieved by having a control system that can monitor the electrolyzer load, decide whether to engage another electrolyzer and then perform load sharing between the two (or more) electrolyzers.
  • a power balancing system 10 for balancing power in an offshore renewable power system is disclosed in figure 2.
  • the system 10 comprises a power input 12 connected to a power source 14; a power output 16 powered by the power input 12 and connected to a power consuming grid 18;; at least one electrolysis device 20, 22 powered by the power input 12; a monitoring device 24 configured to monitor power input from the power source 14 and/or power output to the power consuming grid 18, and a control device 26 configured to control an operation of the at least one electrolysis device 20, 22 based on the result of the monitoring performed by the monitoring device 24.
  • the at least one electrolysis devices may comprise a first 20 and a second 22 electrolysis device, and the control device 26 may be configured to, based on the result of the monitoring performed by the monitoring device 24, control an operation of the first and the second electrolysis devices 20, 22.
  • the control device 26 may be configured to control the operation of the first and/or the second electrolysis devices 20, 22 in order to balance the active power supplied at the power input 12.
  • the power source 14 may include an intermittent, renewable power source.
  • the renewable power source may include at least one wind turbine.
  • the at least one electrolysis device 20, 22 may include a water electrolysis device configured for producing hydrogen.
  • the control device 26 may be configured to monitor a load of the first electrolysis device 20 and to decide whether to engage the second electrolysis device 22 based on the load of the first electrolysis device 20.
  • the control device 26 may further be configured to perform a load sharing between the first and the second electrolysis devices 20, 22.
  • the system 10 may further comprise a battery and/or a capacitor bank 28 for improving power balancing.
  • the battery/capacitor bank 28 may be connected to the power input 12 and the power output 16 and the monitoring device 24 may be configured to monitor power flowing into and/or out of the battery/capacitor bank 28.
  • the system 10 may, in addition to said at least one electrolysis device 20, 22, comprise at least one pump 30 which connected to the power input 12.
  • the pump 30 may be a heat pump or a fluid circulation pump, e.g. a pump in a seawater treatment system.
  • the system 10 may be configured to engage, in addition to the at least one electrolysis device 20, 22, the pump 30 to contribute to balancing power in the system.
  • a heating system there is generally some flexibility in allowed heating fluid temperature and/or flow rate that can be utilized to allow pumps to be engaged and disengaged to provide power balancing or at least contribute to such balancing.
  • available water tank capacity can be utilized in a similar manner, i.e. by engaging and disengaging water pumps to contribute to the power balancing.
  • a method of operating the system 10 for balancing power in an offshore renewable power system may comprise the steps of inputting power from the power source 14 to the a power input 12; powering, by the power input 12, the power output 16 to power the consuming grid 18; powering, by the power input 12, the at least one electrolysis device 20, 22; monitoring, by the monitoring device 24, the power input from the power source 14 and/or the power output to the power consuming grid 18, and controlling, by the control device 26 and based on the result of the monitoring, an operation of the at least one electrolysis device 20, 22.
  • the at least one electrolysis device may comprise a first 20 and a second 22 electrolysis device.
  • the controlling, by the control device 26, may include controlling an operation of the first 20 and the second 22 electrolysis devices, based on the result of the monitoring.
  • the controlling, by the control device 26, may include controlling the operation of the first and/or the second electrolysis devices 20, 22 in order to balance active power supplied at the power input.
  • the power source may include an intermittent, renewable power source, for instance at least one wind turbine.
  • the at least one electrolysis device 20, 22 may include a water electrolysis device, producing hydrogen.
  • the controlling, by the control device 26, may include monitoring a load of the first electrolysis device 20 and deciding whether to engage the second electrolysis device 22 based on the load of the first electrolysis device 20.
  • the controlling, by the control device 26, may further include performing a load sharing between the first and the second electrolysis devices.
  • the method may further comprise improving power balancing by means of the battery and/or capacitor bank 28.
  • Figure 1 is a schematic graph illustrating an exemplary control of a first and second electrolysis devices in accordance with principles of the invention.
  • the first and second electrolysis devices are included in a system for balancing power in an offshore renewable power system, which comprises a power input connected to a power source; a power output connected to a power consuming grid; powered by the power input; the first and second electrolysis devices, which are powered by the power input; a monitoring device, configured to monitor the power input from the power source and/or the power output to the power consuming grid, and a control device, configured to, based on the result of the monitoring, controlling an operation of the at least first and second electrolysis devices.
  • the first and second electrolysis devices may, for example, be configured in the same way as the first and second electrolysis devices 20, 22 in figure 2.
  • Figure 1 shows load at the vertical axis with respect to time at the horizontal axis and illustrates an exemplary scenario that may be associated with the disclosed system and method.
  • a monitoring device determines that a load on a first electrolysis device (Ell), e.g. the first electrolysis device 20 in figure 2, increases.
  • the load on the first electrolysis device (Ell) reaches a load setpoint.
  • a second electrolysis device (E12), e.g. the second electrolysis device 22 in figure 2 is engaged.
  • a steady-state load sharing is reached.

Abstract

A system for balancing power in an offshore renewable power system comprises a power input connected to a power source; a power output to a power consuming grid; powered by the power input; at least one electrolysis device powered by the power input; a monitoring device, configured to monitor the power input from the power source and/or the power output to the power consuming grid, and a control device, configured to, based on the result of the monitoring, controlling an operation of the at least one electrolysis device.

Description

SYSTEM AND METHOD FOR BALANCING POWER IN AN OFFSHORE RENEWABLE POWER SYSTEM
TECHNICAL FIELD
The invention relates to a power balancing system and method for balancing power in an offshore renewable power system.
SUMMARY OF THE INVENTION
The invention has been set forth in the appended claims.
According to a first aspect, the present disclosure provides a power balancing system for balancing power in an offshore renewable power system, the power balancing system comprising a power input connected to a power source; a power output to a power consuming grid; powered by the power input; at least one electrolysis device powered by the power input; a monitoring device, configured to monitor the power input from the power source and/or the power output to the power consuming grid, and a control device, configured to, based on the result of the monitoring, controlling an operation of the at least one electrolysis device.
The at least one electrolysis devices may comprise a first and a second electrolysis device, and the control device may be configured to, based on the result of the monitoring performed by the monitoring device, control an operation of the first and the second electrolysis devices.
The control device may be configured to control the operation of the first and/or the second electrolysis devices in order to balance the active power supplied at the power input.
The power source may include an intermittent, renewable power source. The renewable power source may include at least one wind turbine.
The at least one electrolysis device may include a water electrolysis device configured for producing hydrogen.
The control device may be configured to monitor a load of at first electrolysis device and to decide whether to engage a second electrolysis device based on the load of the first electrolysis device. The control device may further be configured to perform a load sharing between the first and the second electrolysis devices. The power balancing system may further comprise a battery and/or a capacitor bank for improving power balancing.
According to one embodiment the system may, in addition to said at least one electrolysis device, comprise at least one pump connected to the power input. Said at least one pump may be a heat pump or a fluid circulation pump, e.g. a pump in a seawater treatment system. In such a case the system may be configured to engage, in addition to the at least one electrolysis device, the at least pump to contribute to balancing power in the system. In a heating system there is generally some flexibility in allowed heating fluid temperature and/or flow rate that can be utilized to allow pumps to be engaged and disengaged to provide power balancing or at least contribute to such balancing. In a seawater treatment system, available water tank capacity can be utilized in a similar manner, i.e. by engaging and disengaging water pumps to contribute to the power balancing.
According to a second aspect, the present disclosure provides a method for balancing power in an offshore renewable power system, comprising the steps of:
- inputting power from a power source to a power input;
- powering, by the power input, a power output to power a consuming grid;
- powering, by the power input, at least one electrolysis device;
- monitoring, by a monitoring device, the power input from the power source and/or the power output to the power consuming grid, and
- controlling, by a control device, based on the result of the monitoring, an operation of the at least one electrolysis device.
The at least one electrolysis devices may comprise a first and a second electrolysis device, and the step of controlling, by the control device, may include controlling an operation of the first and the second electrolysis devices based on the result of the monitoring.
The step of controlling, by the control device, may include controlling the operation of the first and/or the second electrolysis devices in order to balance the active power supplied at the power input.
In the method, the power source may include an intermittent, renewable power source, wherein the renewable power source may include at least one wind turbine.
In the method, the at least one electrolysis device may include a water electrolysis device configured to produce hydrogen. Said step of controlling, by the control device, may include monitoring a load of a first electrolysis device and deciding whether to engage a second electrolysis device based on the load of the first electrolysis device.
The method may further comprise performing, by the control device, a load sharing between the first and the second electrolysis devices.
The method may further comprise improving power balancing by means of a battery and/or a capacitor bank, e.g. by providing capacitive capacity from the battery and/or a capacitor bank.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic graph illustrating an exemplary control of a first and second electrolysis devices in accordance with principles of the invention.
DETAILED DESCRIPTION
Possible principles, features, or details of the system and method are disclosed in the following:
In certain aspects, two or more electrolyzers, or electrolysis devices, are used in the effort of balancing the active power supplied in a renewable energy application where traditional ways of balancing active power, like batteries and rotating mass, are not possible or preferable.
In renewable energy grids the use of intermittent energy sources, like wind and solar, impacts the quality of the power supplied. In grids that are dominated by a few big loads the impact becomes even stronger. In traditional grids the active power is balanced using rotating mass (e.g. gas turbines with electrical generator) with speed control. In grids without rotating mass batteries or capacitor banks can provide the instant adjustment by charging or discharging.
However, for renewable energy microgrids where the power fluctuations can be in magnitude MW/s having only a battery for frequency control will drive the size of the battery. This invention mitigates the need for enormous battery stations for these applications.
For renewable energy microgrids where excess power is used to electrolyze water to hydrogen, electrolyzers can be a supplement to the power quality control. This is achieved by having a control system that can monitor the electrolyzer load, decide whether to engage another electrolyzer and then perform load sharing between the two (or more) electrolyzers.
For these applications a battery or capacitor bank may still be required to achieve the response time needed to avoid big or prolonged frequency deviations. But by expanding the envelope where the electrolyzer system can both increase and reduce grid frequency a reduction in battery size is possible.
A power balancing system 10 for balancing power in an offshore renewable power system is disclosed in figure 2. The system 10 comprises a power input 12 connected to a power source 14; a power output 16 powered by the power input 12 and connected to a power consuming grid 18;; at least one electrolysis device 20, 22 powered by the power input 12; a monitoring device 24 configured to monitor power input from the power source 14 and/or power output to the power consuming grid 18, and a control device 26 configured to control an operation of the at least one electrolysis device 20, 22 based on the result of the monitoring performed by the monitoring device 24.
The at least one electrolysis devices may comprise a first 20 and a second 22 electrolysis device, and the control device 26 may be configured to, based on the result of the monitoring performed by the monitoring device 24, control an operation of the first and the second electrolysis devices 20, 22.
The control device 26 may be configured to control the operation of the first and/or the second electrolysis devices 20, 22 in order to balance the active power supplied at the power input 12.
The power source 14 may include an intermittent, renewable power source. For instance, the renewable power source may include at least one wind turbine.
The at least one electrolysis device 20, 22 may include a water electrolysis device configured for producing hydrogen.
The control device 26 may be configured to monitor a load of the first electrolysis device 20 and to decide whether to engage the second electrolysis device 22 based on the load of the first electrolysis device 20.
The control device 26 may further be configured to perform a load sharing between the first and the second electrolysis devices 20, 22.
The system 10 may further comprise a battery and/or a capacitor bank 28 for improving power balancing. The battery/capacitor bank 28 may be connected to the power input 12 and the power output 16 and the monitoring device 24 may be configured to monitor power flowing into and/or out of the battery/capacitor bank 28.
According to one embodiment the system 10 may, in addition to said at least one electrolysis device 20, 22, comprise at least one pump 30 which connected to the power input 12. The pump 30 may be a heat pump or a fluid circulation pump, e.g. a pump in a seawater treatment system. In such an embodiment the system 10 may be configured to engage, in addition to the at least one electrolysis device 20, 22, the pump 30 to contribute to balancing power in the system. In a heating system there is generally some flexibility in allowed heating fluid temperature and/or flow rate that can be utilized to allow pumps to be engaged and disengaged to provide power balancing or at least contribute to such balancing. In a seawater treatment system, available water tank capacity can be utilized in a similar manner, i.e. by engaging and disengaging water pumps to contribute to the power balancing.
A method of operating the system 10 for balancing power in an offshore renewable power system may comprise the steps of inputting power from the power source 14 to the a power input 12; powering, by the power input 12, the power output 16 to power the consuming grid 18; powering, by the power input 12, the at least one electrolysis device 20, 22; monitoring, by the monitoring device 24, the power input from the power source 14 and/or the power output to the power consuming grid 18, and controlling, by the control device 26 and based on the result of the monitoring, an operation of the at least one electrolysis device 20, 22.
The at least one electrolysis device may comprise a first 20 and a second 22 electrolysis device. The controlling, by the control device 26, may include controlling an operation of the first 20 and the second 22 electrolysis devices, based on the result of the monitoring.
The controlling, by the control device 26, may include controlling the operation of the first and/or the second electrolysis devices 20, 22 in order to balance active power supplied at the power input.
The power source may include an intermittent, renewable power source, for instance at least one wind turbine.
The at least one electrolysis device 20, 22 may include a water electrolysis device, producing hydrogen. The controlling, by the control device 26, may include monitoring a load of the first electrolysis device 20 and deciding whether to engage the second electrolysis device 22 based on the load of the first electrolysis device 20.
The controlling, by the control device 26, may further include performing a load sharing between the first and the second electrolysis devices.
The method may further comprise improving power balancing by means of the battery and/or capacitor bank 28.
Figure 1 is a schematic graph illustrating an exemplary control of a first and second electrolysis devices in accordance with principles of the invention.
The first and second electrolysis devices are included in a system for balancing power in an offshore renewable power system, which comprises a power input connected to a power source; a power output connected to a power consuming grid; powered by the power input; the first and second electrolysis devices, which are powered by the power input; a monitoring device, configured to monitor the power input from the power source and/or the power output to the power consuming grid, and a control device, configured to, based on the result of the monitoring, controlling an operation of the at least first and second electrolysis devices. The first and second electrolysis devices may, for example, be configured in the same way as the first and second electrolysis devices 20, 22 in figure 2.
Figure 1 shows load at the vertical axis with respect to time at the horizontal axis and illustrates an exemplary scenario that may be associated with the disclosed system and method.
At (1), a monitoring device, e.g. the monitoring device 24 in figure 2, determines that a load on a first electrolysis device (Ell), e.g. the first electrolysis device 20 in figure 2, increases. At (2), the load on the first electrolysis device (Ell) reaches a load setpoint. At (3), a second electrolysis device (E12), e.g. the second electrolysis device 22 in figure 2, is engaged. At (4), a steady-state load sharing is reached.

Claims

1. Power balancing system (10) for balancing power in an offshore renewable power system, comprising a power input (12) connected to a power source (14); a power output (16) connected to a power consuming grid (18) and powered by the power input (12); at least one electrolysis device (20, 22) powered by the power input (12); a monitoring device (24), configured to monitor power input from the power source (14) and/or power output to the power consuming grid (18), and a control device (26), configured to, based on the result of the monitoring, control an operation of the at least one electrolysis device (20, 22).
2. Power balancing system (10) according to claim 1, wherein the at least one electrolysis devices comprise a first (20) and a second electrolysis device (22), and wherein the control device (26) is configured to, based on the result of the monitoring, control an operation of the first (20) and the second (22) electrolysis devices.
3. Power balancing system (10) according to one of the claims 1 or 2, wherein the control device (26) is configured to control the operation of the first and/or the second electrolysis devices (20, 22) in order to balance the active power supplied at the power input (12).
4. Power balancing system (10) according to one of the claims 1 to 3, wherein the power source (14) includes an intermittent, renewable power source.
5. Power balancing system (10) according to claim 4, wherein the renewable power source includes at least one wind turbine.
6. Power balancing system (10) according to one of the claims 1-5, wherein the at least one electrolysis device includes a water electrolysis device, producing hydrogen.
7. Power balancing system (10) according to one of the claims 1-6, wherein the control device is configured to monitor a load of at first electrolysis device and to decide whether to engage a second electrolysis device based on the load of the first electrolysis device.
8. Power balancing system (10) according to claim 7, wherein the control device is further configured to perform a load sharing between the first and the second electrolysis devices.
9. Power balancing system (10) according to claim 8, further comprising a battery and/or a capacitor bank for improving power balancing.
10. Method for balancing power in an offshore renewable power system, comprising the steps of: inputting power from a power source (14) to a power input (12); powering, by the power input (12), a power output (16) to power a consuming grid
(18); powering, by the power input (12), at least one electrolysis device (20, 22); monitoring, by a monitoring device (24), power input from the power source (14) and/or power output to the power consuming grid (18), and controlling, by a control device (26), based on the result of the monitoring, an operation of the at least one electrolysis device (20, 22).
11. Method according to claim 10, wherein the at least one electrolysis devices comprise a first (20) and a second (22) electrolysis device, and wherein the controlling, by the control device (26), includes controlling an operation of the first and the second electrolysis devices (20, 22), based on the result of the monitoring.
12. Method according to claim 11, wherein the controlling, by the control device (25), includes controlling the operation of the first and/or the second electrolysis devices (20, 22) in order to balance the active power supplied at the power input (12).
13. Method according to one of the claims 9 to 12, wherein the power source (14) includes an intermittent, renewable power source.
14. Method according to claim 13, wherein the renewable power source (14) includes at least one wind turbine.
15. Method according to one of the claims 9-14, wherein the at least one electrolysis device (20, 22) includes a water electrolysis device, producing hydrogen.
16. Method according to one of the claims 9-15, wherein the controlling, by the control device (26), includes monitoring a load of a first electrolysis device (20) and deciding whether to engage a second electrolysis device (22) based on the load of the first electrolysis device (22).
17. Method according to claim 16, further comprising, by the control device (26), performing a load sharing between the first and the second electrolysis devices (20, 22).
18. Method according to claim 17, further comprising improving power balancing by means of a battery and/or a capacitor bank (28).
PCT/EP2020/074615 2019-09-03 2020-09-03 System and method for balancing power in an offshore renewable power system WO2021043912A1 (en)

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WO2023144359A1 (en) 2022-01-31 2023-08-03 Shell Internationale Research Maatschappij B.V. Methods to provide electric power from renewable energy equipment to an electrical load

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