An Off-grid Remote Ocean Island / Isolated Island Operation System

Abstract

This invention relates to the field of integrated energy technology and discloses an off-grid, isolated island operation system. In this invention, a freshwater treatment unit uses desalinated seawater as a freshwater supply source for the island, and simultaneously transports the desalinated seawater to an electrolyzer. The electrolyzer produces hydrogen and oxygen. Plantations and aquaculture farms on the island serve as food sources, and the resulting biomass waste is converted into natural gas through a biological waste treatment device. A hydrogen-blended gas turbine generates electricity to supply the island's electrical load, while the exhaust gas from the hydrogen-blended gas turbine is used to provide heating and cooling to the island via a waste heat boiler and a lithium bromide generator through a heating network. The water vapor generated by the lithium bromide generator is recovered by the freshwater treatment unit and returned to the electrolyzer. This system fully utilizes the island's geographical advantages as a combination of land and sea features, providing comprehensive support in terms of food, freshwater, electricity, and heat energy, enabling the isolated island to operate completely independently without external support.

Description

Technical Field

[0001] This invention relates to the field of integrated energy technology, specifically to an off-grid, remote-sea island operation system. Background Technology

[0002] my country's key infrastructure sectors, such as power and transportation, are accelerating their transformation towards deep low-carbon and clean energy. An increasing number of remote islands are awaiting development, maritime traffic is becoming increasingly busy, and offshore energy demand will become a key target for deep decarbonization after carbon peaking. More importantly, remote islands urgently need safe and stable isolated island operation systems. Because these isolated islands lack the support of a large power grid, their microgrids rely solely on renewable energy generation and lack the capability for completely isolated operation. When wind and solar resources are unfavorable, or when power sources are attacked or damaged, power outages are highly likely. Summary of the Invention

[0003] In view of this, the present invention provides an off-grid remote island operation system to solve the problem that remote islands do not have the ability to operate completely in isolation.

[0004] This invention provides an off-grid, remotely operated island system, comprising: a freshwater treatment unit, an electrolyzer, a floating marine thermal energy conversion power generation platform, an offshore wind power unit, a solar photovoltaic unit, an island plantation, an island aquaculture farm, a biological waste treatment device, a hydrogen-blended gas turbine, a waste heat boiler, and a lithium bromide unit.

[0005] The freshwater treatment unit is used to desalinate seawater and use the desalinated seawater as a source of freshwater supply for the island, while also transporting the desalinated seawater to the electrolytic cell.

[0006] The electrolyzer uses the electricity provided by the floating marine thermal energy conversion power generation platform, the offshore wind power unit, and the solar photovoltaic unit, as well as the water transported by the freshwater treatment unit, to produce hydrogen and oxygen;

[0007] The plantations and aquaculture farms on the island serve as the island's food supply source, and the biomass waste generated by the plantations and aquaculture farms is converted into gas that can replace natural gas fuel through the biological waste treatment device.

[0008] The hydrogen-blended gas turbine generates electricity using hydrogen transmitted from the electrolyzer and gas transmitted from the biological waste treatment device to supply the island's electrical load. Simultaneously, the exhaust gas from the hydrogen-blended gas turbine supplies heat and cooling to the island via the waste heat boiler and the lithium bromide unit through the heating network. The water vapor generated by the lithium bromide unit is recovered to the electrolyzer via the freshwater treatment unit.

[0009] In one optional embodiment, the system further includes: a hydrogen storage tank and an oxygen storage tank, wherein,

[0010] The hydrogen storage tank is used to store the hydrogen produced by the electrolyzer;

[0011] The oxygen storage tank is used to store the oxygen produced by the electrolyzer;

[0012] When the hydrogen production of the electrolyzer fluctuates, the charging and discharging of the hydrogen storage tank is adjusted to suppress the fluctuation in hydrogen production.

[0013] In one optional embodiment, the system further includes: a thermal energy storage device and an electric boiler, wherein,

[0014] When the heat supply of the hydrogen-blended gas turbine exceeds the heat load, the thermal energy storage device is activated to store heat.

[0015] When the heat output of the hydrogen-blended gas turbine is less than the heat load, the thermal energy storage device is activated to release heat or the electric boiler is activated to supplement the heat supply.

[0016] In one optional embodiment, the system further includes: a carbon capture device and a methane reactor, wherein,

[0017] The carbon capture device is used to recover carbon dioxide from the exhaust gas of the hydrogen-blended gas turbine and to transport the recovered carbon dioxide to the methane reactor.

[0018] The methane reactor converts the carbon dioxide into natural gas, which is then supplied to the hydrogen-blended gas turbine.

[0019] In one alternative embodiment, the system further includes a fuel cell, which converts hydrogen in the hydrogen storage tank into electrical energy to supply the island's electrical load when the heat load is less than a preset value.

[0020] In one optional embodiment, the biological waste treatment device includes: a pyrolysis gasification device, a biogas digester, a purification device, and a gas storage tank, wherein,

[0021] The pyrolysis gasification device is used to convert the dry waste in the biomass waste into syngas that can replace natural gas fuel, and to store the syngas in the gas storage tank;

[0022] The biogas digester is used to ferment the wet waste in the biomass waste to produce biogas;

[0023] The purification device is used to purify biogas and store the purified biogas in the gas storage tank.

[0024] In one optional embodiment, the system further includes a seaweed feeding area, through which seaweed is used to supplement biogas fermentation raw materials.

[0025] In one optional embodiment, the freshwater treatment unit includes: a membrane desalination device, a thermal desalination device, and a freshwater storage tank, wherein the membrane desalination device and the thermal desalination device are used to desalinate seawater and send the desalinated seawater into the freshwater storage tank.

[0026] In one alternative embodiment, the system further includes a flood interception ditch and a rainwater regulating pond, wherein the flood interception ditch is used to collect rainwater and send the rainwater into the rainwater regulating pond.

[0027] In one optional embodiment, the system further includes: a soil source heat pump, a seawater source heat pump, and a water treatment unit, wherein the soil source heat pump and the seawater source heat pump provide diverse heat energy supply for the island, and the water generated by the soil source heat pump and the seawater source heat pump is sent to the freshwater storage tank through the water treatment unit.

[0028] In one alternative implementation, the system further includes a land-based mobile energy storage vehicle and an offshore energy storage vessel, wherein the land-based mobile energy storage vehicle and the offshore energy storage vessel are used to provide power and energy to the island in extreme situations.

[0029] This invention provides an off-grid, remotely operated island system. In this system, a freshwater treatment unit desalinates seawater, using the desalinated seawater as a freshwater supply source for the island. Simultaneously, the desalinated seawater is transported to an electrolyzer. The electrolyzer utilizes electricity from a floating marine thermal energy conversion platform, offshore wind power, and solar photovoltaic units, along with water transported from the freshwater treatment unit, to produce hydrogen and oxygen. Plantations and aquaculture farms on the island serve as food sources. Biomass waste generated from these farms is converted into gases that can replace natural gas fuel through a biological waste treatment device. A hydrogen-blended gas turbine uses the hydrogen from the electrolyzer and the gases from the biological waste treatment device to generate electricity, supplying the island's electrical load. Simultaneously, the exhaust gas from the hydrogen-blended gas turbine is used to provide heating and cooling to the island via a waste heat boiler and a lithium bromide unit through a heating network. Water vapor generated by the lithium bromide unit is recovered by the freshwater treatment unit and returned to the electrolyzer. The system makes full use of the island's geographical advantages as a combination of land and sea features, and provides comprehensive support in terms of food, fresh water, electricity, and heat, enabling the remote island to operate as a completely isolated island without any support. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of an off-grid, remote-sea island operation system according to an embodiment of the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This invention provides an off-grid, remote, island / island operation system, such as... Figure 1 As shown, the system includes: a freshwater treatment unit, an electrolyzer, a floating marine thermal energy conversion power generation platform, an offshore wind power unit, a solar photovoltaic unit, an island plantation, an island aquaculture farm, a biological waste treatment device, a hydrogen-blended gas turbine, a waste heat boiler, and a lithium bromide unit.

[0034] The freshwater treatment unit desalinates seawater, providing it as a freshwater supply for the island. The desalinated seawater is then transported to an electrolyzer. This electrolyzer uses electricity from a floating marine thermal power generation platform, offshore wind power, and solar photovoltaic units, along with water from the freshwater treatment unit, to produce hydrogen and oxygen. Plantations and aquaculture farms on the island serve as food sources. Biomass waste from these farms is converted into gases that can replace natural gas fuel through a biological waste treatment device. A hydrogen-blended gas turbine uses the hydrogen from the electrolyzer and the gases from the biological waste treatment device to generate electricity, supplying the island's electrical load. Simultaneously, the exhaust gas from the hydrogen-blended gas turbine is used to provide heating and cooling for the island via a waste heat boiler and a lithium bromide unit through a heating network. Water vapor produced by the lithium bromide unit is recovered by the freshwater treatment unit and returned to the electrolyzer.

[0035] Specifically, the off-grid, remote-sea island operation system is equipped with a floating marine thermal energy conversion power generation platform. This platform utilizes the temperature difference between surface and deep seawater to generate electricity, complementing offshore wind power units and solar photovoltaic units to provide power load for the islands and jointly ensure their power security. The system also includes a proton exchange membrane electrolyzer, which can start and stop quickly and has a wide power adjustment range. Additionally, the system includes on-island plantations and aquaculture farms, as well as a biomass waste treatment facility to provide self-sufficient food supplies for the islands. The generated biomass waste undergoes dry-wet separation; the dried waste is pyrolyzed into clean fuel, while the moist portion is purified into natural gas through anaerobic fermentation, thus meeting gas demand. The system also includes a hydrogen-blended gas turbine, which generates electricity according to a "heat-to-electricity" model to supply the islands' electrical load. Hydrogen from the electrolyzer and gas from the biomass waste treatment facility fuel the hydrogen-blended gas turbine, and the generated electricity provides a stable power supply for the islands. The exhaust gas from the hydrogen-blended gas turbine is supplied to the islands for heating and cooling via a waste heat boiler, a lithium bromide unit, and a heating network. The water vapor generated by the lithium bromide unit is recovered to the electrolyzer via a freshwater treatment unit.

[0036] This invention provides an off-grid, remotely operated island system. In this system, a freshwater treatment unit desalinates seawater, using the desalinated seawater as a freshwater supply source for the island. Simultaneously, the desalinated seawater is transported to an electrolyzer. The electrolyzer utilizes electricity from a floating marine thermal energy conversion platform, offshore wind power, and solar photovoltaic units, along with water transported from the freshwater treatment unit, to produce hydrogen and oxygen. Plantations and aquaculture farms on the island serve as food sources. Biomass waste generated from these farms is converted into gases that can replace natural gas fuel through a biological waste treatment device. A hydrogen-blended gas turbine uses the hydrogen from the electrolyzer and the gases from the biological waste treatment device to generate electricity, supplying the island's electrical load. Simultaneously, the exhaust gas from the hydrogen-blended gas turbine is used to provide heating and cooling to the island via a waste heat boiler and a lithium bromide unit through a heating network. Water vapor generated by the lithium bromide unit is recovered by the freshwater treatment unit and returned to the electrolyzer. The system makes full use of the island's geographical advantages as a combination of land and sea features, and provides comprehensive support in terms of food, fresh water, electricity, and heat, enabling the remote island to operate as a completely isolated island without any support.

[0037] In one alternative implementation, such as Figure 1 As shown, the system also includes a hydrogen storage tank and an oxygen storage tank. The hydrogen storage tank stores the hydrogen produced by the electrolyzer, and the oxygen storage tank stores the oxygen produced by the electrolyzer. When the hydrogen production from the electrolyzer fluctuates, the charging and discharging of the hydrogen storage tank is adjusted to suppress these fluctuations.

[0038] Specifically, the hydrogen produced by the electrolyzer is stored in a hydrogen storage tank. High-pressure gaseous hydrogen storage is used, allowing for direct sale to supply hydrogen loads such as those on ships. Oxygen is sent to an oxygen storage tank and sold to generate revenue. Furthermore, renewable energy sources like offshore wind and solar photovoltaic power experience significant fluctuations in power generation capacity due to variations in wind speed and sunlight. Since the electrolyzer relies on electricity generated from these sources for hydrogen production, these fluctuations inevitably affect its operation, and its workload is influenced by the available power supply. When offshore wind and solar photovoltaic power supply is insufficient, the electrolyzer's hydrogen production decreases, and hydrogen is released from the storage tank to supplement the shortage. When offshore wind and solar photovoltaic power supply is sufficient, excess hydrogen is stored and released when needed, maintaining a stable hydrogen supply.

[0039] In one alternative implementation, such as Figure 1 As shown, the system also includes a thermal energy storage device and an electric boiler. When the heat supply from the hydrogen-blended gas turbine exceeds the heat load, the thermal energy storage device is activated to store heat. When the heat supply from the hydrogen-blended gas turbine is less than the heat load, the thermal energy storage device is activated to release heat or the electric boiler is activated to supplement the heat supply.

[0040] Specifically, thermal energy storage devices and electric boilers are configured to rationally allocate electricity and heat based on wind curtailment and electricity consumption, ensuring mutual complementarity and jointly guaranteeing the safety of offshore heat load. For example, when wind and solar power supplies are sufficient and the island's electricity load is guaranteed, wind and electricity curtailment is avoided, and heating is directly provided through electric boilers. When wind and solar power supplies are insufficient, the island's electricity load is guaranteed by generating electricity through hydrogen-blended gas turbines. The heat generated by the system is supplied to heat users through cascade utilization, and excess heat energy is stored in thermal energy storage and supplied to heat users on time and in the required quantity.

[0041] In this embodiment of the invention, the thermal energy storage device utilizes the waste heat generated by the hydrogen-blended gas turbine in a cascade manner, improving energy efficiency and enabling offshore heat load supply. The integration of the electric boiler into the heating network complements the thermal energy storage, enhancing the safety factor of the heat load.

[0042] In one alternative implementation, such as Figure 1 As shown, the system also includes a carbon capture unit and a methane reactor. The carbon capture unit recovers carbon dioxide from the exhaust gas of the hydrogen-blended gas turbine and transports the recovered carbon dioxide to the methane reactor. The methane reactor converts the carbon dioxide into natural gas, which is then supplied back to the hydrogen-blended gas turbine.

[0043] Specifically, the system is equipped with a carbon capture device to recycle the generated carbon dioxide. The carbon dioxide generated during the production process of the hydrogen-blended gas turbine unit is used as feedstock for the methane reactor, and the natural gas produced is then supplied to the hydrogen-blended gas turbine unit, thus minimizing the system's carbon emissions.

[0044] In one alternative implementation, such as Figure 1 As shown, the system also includes a fuel cell, which converts hydrogen from the hydrogen storage tank into electrical energy to supply the island's electrical load when the heat load is less than a preset value.

[0045] Specifically, fuel cells operate as energy storage systems, and hydrogen-blended gas turbines are used to rationally allocate hydrogen energy to maximize benefits. For example, when heat load demand is high, hydrogen-blended gas turbines enable the cascade utilization of electricity and heat energy; when heat load demand is low, fuel cells are used to consider the diversified utilization of hydrogen energy. With more hydrogen-using devices, excess electricity is converted into hydrogen energy to supply the devices, significantly reducing wind curtailment and greatly reducing the output of hydrogen-blended gas turbines, resulting in a significant decrease in carbon emissions.

[0046] In this embodiment of the invention, the system is configured with a proton exchange membrane fuel cell to power the offshore load. The fuel cell participates in peak shaving during load fluctuations and can also serve as a supplementary power source to ensure the safety of the offshore load. The fuel cell and the hydrogen-blended gas turbine complement each other, jointly ensuring the safe and stable operation of the offshore load and improving system safety.

[0047] In one alternative implementation, such as Figure 1 As shown, the biomass waste treatment device includes: a pyrolysis gasification unit, a biogas digester, a purification unit, and a gas storage tank. The pyrolysis gasification unit converts dry biomass waste into syngas, a fuel that can replace natural gas, and stores the syngas in the storage tank. The biogas digester ferments wet biomass waste to produce biogas. The purification unit purifies the biogas and stores the purified biogas in the storage tank.

[0048] Specifically, the biomass waste generated by plantations and aquaculture farms on the island is separated into dry and wet components. The dry biomass waste is pyrolyzed into syngas, which can replace natural gas fuel, while the wet portion is purified into high-quality biogas that meets natural gas standards after anaerobic fermentation, thereby meeting the gas demand.

[0049] In one alternative implementation, such as Figure 1 As shown, the system also includes a seaweed feeding area, through which seaweed is used to supplement the biogas fermentation raw materials.

[0050] Specifically, the seaweed in the seaweed feeding area balances the amount of biomass waste used, ensuring a high-quality biogas supply. For example, when the amount of waste straw and animal manure produced by plantations and aquaculture farms on the island is insufficient to support the fermentation of biogas digesters and produce enough biogas, the seaweed in the seaweed feeding area supplements the biogas fermentation raw materials, ensuring a stable biogas supply.

[0051] In this embodiment of the invention, the system is configured with a seaweed feeding area. Utilizing the abundant and large size of seaweed, which makes it an excellent raw material for biogas fermentation, biogas is produced locally using seaweed as the raw material. High-quality biogas in the gas storage tank, hydrogen in the hydrogen storage tank, and natural gas from the methane reactor provide fuel for the hydrogen-blended gas turbine. The generated electricity provides a stable power supply to the island. The exhaust gas, after passing through a waste heat boiler and lithium bromide cascade utilization of thermal energy, enters the methane reactor via a carbon capture device to supply fuel to the hydrogen-blended gas turbine, achieving recycling. The natural gas and hydrogen required for the hydrogen-blended gas turbine, fuel cells, and other equipment can all be generated through the diversified utilization of hydrogen energy and biogas within the system. The system does not require external gas supply, achieving island-wide operation capability.

[0052] In one alternative implementation, such as Figure 1 As shown, the freshwater treatment unit includes: a membrane desalination unit, a thermal desalination unit, and a freshwater storage tank. The membrane desalination unit and the thermal desalination unit are used to desalinate seawater and send the desalinated seawater into the freshwater storage tank.

[0053] Specifically, the system is equipped with both membrane desalination and thermal desalination devices, which together ensure the safety of freshwater supply.

[0054] In one alternative implementation, such as Figure 1 As shown, the system also includes: intercepting ditches and rainwater regulating ponds, wherein the intercepting ditches are used to collect rainwater and send it into the rainwater regulating ponds.

[0055] Specifically, the system is equipped with flood interception ditches and rainwater regulating ponds to collect rainwater resources on the island. The recycled and treated rainwater and ship ballast water are used as supplementary water sources to complement seawater desalination.

[0056] In one alternative implementation, such as Figure 1 As shown, the system also includes: a soil source heat pump, a seawater source heat pump, and a water treatment unit. The soil source heat pump and the seawater source heat pump provide diverse heat energy supply for the island, and the water generated by the soil source heat pump and the seawater source heat pump is sent to a freshwater storage tank after passing through the water treatment unit.

[0057] Specifically, the system is equipped with soil-source heat pumps and seawater-source heat pumps, leveraging the island's unique topography—combining land and sea features—to provide a clean, efficient, stable, and reliable basic energy supply. The heat generated by the electric boiler, thermal storage device, lithium bromide unit, soil-source heat pump, and seawater-source heat pump is fed into the heating network to power the thermal desalination unit, ensuring that the thermal desalination unit still has freshwater production capacity even when power supply issues render the membrane desalination unit unavailable.

[0058] In one alternative implementation, such as Figure 1As shown, the system also includes: land-based mobile energy storage vehicles and offshore energy storage vessels, which are used to provide power and energy to the islands in extreme situations.

[0059] Specifically, in the event of extreme situations such as tsunamis, typhoons, earthquakes, or wars on islands, land-based mobile energy storage vehicles and offshore energy storage vessels can respond quickly to ensure the power supply and energy security of critical loads, and guarantee the speed and efficiency of restoring power supply to island microgrids in the face of major disturbances.

[0060] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An off-grid, remote-sea island / island operation system, characterized in that, The system includes: a freshwater treatment unit, an electrolyzer, a floating marine thermal energy conversion power generation platform, an offshore wind power unit, a solar photovoltaic unit, an island plantation, an island aquaculture farm, a biological waste treatment device, a hydrogen-blended gas turbine, a waste heat boiler, and a lithium bromide unit, wherein... The freshwater treatment unit is used to desalinate seawater and use the desalinated seawater as a source of freshwater supply for the island, while also transporting the desalinated seawater to the electrolytic cell. The electrolyzer uses the electricity provided by the floating marine thermal energy conversion power generation platform, the offshore wind power unit, and the solar photovoltaic unit, as well as the water transported by the freshwater treatment unit, to produce hydrogen and oxygen; The plantations and aquaculture farms on the island serve as the island's food supply source, and the biomass waste generated by the plantations and aquaculture farms is converted into gas that can replace natural gas fuel through the biological waste treatment device. The hydrogen-blended gas turbine generates electricity using hydrogen transmitted from the electrolyzer and gas transmitted from the biological waste treatment device to supply the island's electrical load. At the same time, the exhaust gas from the hydrogen-blended gas turbine supplies heat and cooling to the island through the waste heat boiler and the lithium bromide unit via the heating network. The water vapor generated by the lithium bromide unit is recovered to the electrolyzer through the freshwater treatment unit. The system also includes: a thermal energy storage device and an electric boiler, wherein... When the heat supply of the hydrogen-blended gas turbine exceeds the heat load, the thermal energy storage device is activated to store heat. When the heat supply of the hydrogen-blended gas turbine is less than the heat load, the thermal energy storage device is started to release heat or the electric boiler is started to supplement the heat supply. The biological waste treatment device includes: a pyrolysis gasification unit, a biogas digester, a purification unit, and a gas storage tank, wherein... The pyrolysis gasification device is used to convert the dry waste in the biomass waste into syngas that can replace natural gas fuel, and to store the syngas in the gas storage tank; The biogas digester is used to ferment the wet waste in the biomass waste to produce biogas; The purification device is used to purify biogas and store the purified biogas in the gas storage tank.

2. The off-grid, remote-sea island / island operation system according to claim 1, characterized in that, The system also includes: a hydrogen storage tank and an oxygen storage tank, wherein, The hydrogen storage tank is used to store the hydrogen produced by the electrolyzer; The oxygen storage tank is used to store the oxygen produced by the electrolyzer; When the hydrogen production of the electrolyzer fluctuates, the charging and discharging of the hydrogen storage tank is adjusted to suppress the fluctuation in hydrogen production.

3. The off-grid, remote-sea island / island operation system according to claim 2, characterized in that, The system also includes: a carbon capture device and a methane reactor, wherein... The carbon capture device is used to recover carbon dioxide from the exhaust gas of the hydrogen-blended gas turbine and to transport the recovered carbon dioxide to the methane reactor. The methane reactor converts the carbon dioxide into natural gas, which is then supplied to the hydrogen-blended gas turbine.

4. The off-grid, remote-sea island / island operation system according to claim 2, characterized in that, The system also includes a fuel cell, which converts hydrogen in the hydrogen storage tank into electrical energy to supply the island's electrical load when the heat load is less than a preset value.

5. The off-grid, remote-sea island / island operation system according to claim 1, characterized in that, The system also includes a seaweed feeding area, through which seaweed is used to supplement the biogas fermentation raw materials.

6. The off-grid, remote-sea island / island operation system according to claim 1, characterized in that, The freshwater treatment unit includes a membrane desalination device, a thermal desalination device, and a freshwater storage tank. The membrane desalination device and the thermal desalination device are used to desalinate seawater and send the desalinated seawater into the freshwater storage tank.

7. The off-grid, remote-sea island operation system according to claim 6, characterized in that, The system also includes: a flood interception ditch and a rainwater regulating pond, wherein the flood interception ditch is used to collect rainwater and send the rainwater into the rainwater regulating pond.

8. The off-grid, remote-sea island operation system according to claim 7, characterized in that, The system also includes a soil source heat pump, a seawater source heat pump, and a water treatment unit. The soil source heat pump and the seawater source heat pump provide diverse heat energy supply for the island, and the water generated by the soil source heat pump and the seawater source heat pump is sent to the freshwater storage tank through the water treatment unit.

9. The off-grid, remote-sea island / island operation system according to claim 1, characterized in that, The system also includes: a land-based mobile energy storage vehicle and an offshore energy storage vessel, wherein the land-based mobile energy storage vehicle and the offshore energy storage vessel are used to provide power and energy to the islands in extreme situations.

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