KR102310028B1 - Distributed power supply vessel and energy supply system including thereof - Google Patents

Abstract

The present invention relates to a distributed power supply vessel and an energy supply system including the same. More specifically, in accordance with an embodiment of the present invention, the distributed power supply vessel comprises: a fuel cell producing electricity by using hydrogen as fuel; a battery connected to the fuel cell and storing the electricity produced by the fuel cell; a propulsion motor driving a propeller by using the electricity supplied from at least one of the fuel cell and the battery as a power source; a switchboard connected to the propulsion motor and supplying the electric power supplied from at least one of the fuel cell and the battery to the propulsion motor; and a hydrogen fuel storage tank connected to the fuel cell and storing hydrogen inside and supplying the stored hydrogen to the fuel cell. The distributed power supply vessel is able to allow the switchboard to access an on-land station when mooring or waiting and selectively transmit at least a part of the electric power transferred to the switchboard to the on-land station. The present invention aims to provide a distributed power supply vessel and an energy supply system including the same, which are capable of increasing economic efficiency.

Description

Distributed power supply vessel and energy supply system including same

The present invention relates to a distributed power supply vessel and an energy supply system including the same.

In general ships, propulsion engines using fossil fuels are mainly used. However, since ships using these fossil fuels as energy sources generate various pollutants that cause environmental pollution, there are many problems.

The number of ships using liquefied natural gas (LNG), which is a clean energy source emerging as an alternative to such fossil fuels, or hydrogen produced by reforming the same, as an energy source is increasing. In particular, a type of vessel that produces electricity using hydrogen as a fuel, and supplies the generated electricity to a propulsion motor to convert it into propulsion power is emerging.

In the case of a conventional fuel cell vessel using hydrogen as a main raw material, it is configured to store hydrogen in the vessel and supply it to the fuel cell when the vessel is sailing or operating. In addition, the electric energy produced by the fuel cell is transmitted to a propulsion motor, and it is common to rotate a propulsion device such as a thruster using shaft power generated from the propulsion motor to propel the motor.

However, in the case of a ship powered by electricity produced from a fuel cell using hydrogen, the economic feasibility is low as it uses relatively expensive fuel and thrusters compared to ships using fossil fuels such as bunker C oil and diesel. there is

In addition, in the case of small and medium-sized ships that have a lot of berthing or waiting time compared to when sailing or operating, there is a problem in that it is difficult to apply a hydrogen fuel cell due to excessive initial investment and operating costs.

Embodiments of the present invention have been devised to solve the above-mentioned conventional problems, and by supplying electric energy produced from a fuel cell to a regular power system on land while a ship is anchored or waiting on a quay wall, a port, etc., An object of the present invention is to provide a distributed power supply vessel capable of increasing economic feasibility by increasing the operating rate and applying a high-temperature fuel cell with relatively low startability compared to the low-temperature type, but high energy efficiency, and an energy supply system including the same.

According to one aspect of the present invention, a fuel cell for generating electricity using hydrogen as a fuel; a battery connected to the fuel cell and storing electricity generated by the fuel cell; a propulsion motor for driving a propulsion unit using electricity supplied from at least one of the fuel cell and the battery as a power source; a switch board connected to the propulsion motor and supplying power supplied from at least one of the fuel cell and the battery to the propulsion motor; and a hydrogen fuel storage tank connected to the fuel cell, storing hydrogen therein, and supplying the stored hydrogen to the fuel cell, wherein the switch board is connected to a land station and transferred to the switch board when anchored or on standby. A distributed powered vessel may be provided, wherein at least a portion of the generated power is selectively transmitted to the land station.

In addition, a distributed power supply vessel may be provided in which the hydrogen fuel storage tank is connected to the land station to receive hydrogen from the land station when anchored or on standby.

In addition, the fuel cell further includes a heat exchanger for generating steam by heat-exchanging exhaust gas generated in the process of generating electricity with water, wherein the steam generated in the heat exchanger is delivered to the land station when anchored or standing by to provide natural resources. A distributed power supply vessel may be provided, which is used for hydrogen production through reforming gas.

The ballast water treatment device further includes a ballast water treatment device for preventing the inflow and discharge of foreign substances contained in the ballast water, the ballast water treatment device comprising: a compressor for receiving and compressing air; an oxygen generator for generating oxygen from the air compressed by the compressor; an ozone generator for generating ozone from the oxygen generated by the oxygen generator; and a ballast tank to which ozone generated from the ozone generator is supplied, wherein some of the oxygen generated from the oxygen generator is supplied to the fuel cell, a distributed power supply vessel may be provided.

On the other hand, according to another aspect of the present invention, a distributed power supply vessel; and a land station that supplies hydrogen to the distributed power supply vessel and receives electricity from the distributed power supply vessel, wherein the distributed power supply vessel uses hydrogen as a fuel to generate electricity. battery; a battery connected to the fuel cell and storing electricity generated by the fuel cell; a propulsion motor for driving a propulsion unit using electricity supplied from at least one of the fuel cell and the battery as a power source; a switch board connected to the propulsion motor and supplying power supplied from at least one of the fuel cell and the battery to the propulsion motor; and a hydrogen fuel storage tank connected to the fuel cell, storing hydrogen therein, and supplying the stored hydrogen to the fuel cell, wherein when the distributed power supply vessel is anchored or on standby, the switch board is configured to operate at the land station. An energy supply system may be provided, in which at least a portion of the power connected to and delivered to the switch board is selectively transmitted to the land station.

In addition, the land station, a hydrogen loading tank that is installed on land and provided to load hydrogen therein; and a natural gas reformer installed on land to reform natural gas supplied through a natural gas supply line to generate hydrogen, and supply the generated hydrogen to the hydrogen loading tank, wherein the distributed power supply vessel is anchored or An energy supply system may be provided in which the hydrogen fuel storage tank is connected to the hydrogen loading tank in standby to receive hydrogen from the hydrogen loading tank.

In addition, the distributed power supply vessel further includes a heat exchanger for generating steam by heat-exchanging exhaust gas generated in the process of generating electricity from the fuel cell with water, and when the distributed power supply vessel is anchored or on standby The steam generated in the heat exchanger is delivered to the natural gas reformer and used for hydrogen production through the reforming of natural gas, an energy supply system may be provided.

In addition, the land station may include: an inverter connected to the switch board when the distributed power supply vessel is anchored or on standby to convert electricity transmitted from the switch board into AC; and a transformer for transforming electricity converted into alternating current by the inverter, wherein the electricity transformed by the transformer is always transmitted to the power system, an energy supply system may be provided.

According to embodiments of the present invention, by supplying the electric energy produced by the fuel cell to the regular power system on land while the ship is anchored or waiting on the quay wall, port, etc., it is possible to increase the economic efficiency by increasing the regular operation rate of the fuel cell, At the same time, there is an effect that it becomes possible to apply a high-temperature type fuel cell having relatively low startability compared to a low-temperature type but high energy efficiency.

In addition, since the fuel cell is generally operated at a high temperature, it is difficult to turn on/off the fuel cell outside the maintenance period because it takes a lot of time in the initial stage of operation to maintain the operating temperature of the fuel cell. The high efficiency power produced through continuous operation can be utilized even in the midst of a continuous operation, which has the effect of minimizing the energy required in ports and the like.

1 is a conceptual diagram illustrating a distributed power supply vessel and an energy supply system including the same according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a fuel cell driving system of the ship of FIG. 1 .

Hereinafter, specific embodiments for implementing the spirit of the present invention will be described in detail with reference to the drawings.

In addition, in the description of the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, when it is said that a component is 'coupled', 'fixed', or 'contacted' to another component, it may be directly coupled, fixed, or contacted to the other component, but it is understood that other components may exist in the middle. it should be

The terminology used herein is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In addition, in the present specification, expressions of one side, the other side, etc. are described with reference to the drawings, and it is to be noted in advance that if the direction of the corresponding object is changed, it may be expressed differently. For the same reason, some components are exaggerated, omitted, or schematically illustrated in the accompanying drawings, and the size of each component does not fully reflect the actual size.

Also, terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various components, but the components are not limited by these terms. These terms are used only for the purpose of distinguishing one component from another.

As used herein, the meaning of 'comprising' specifies a particular characteristic, region, integer, step, operation, element and/or component, and other specific characteristic, region, integer, step, operation, element, component, and/or group. It does not exclude the existence or addition of

Hereinafter, a detailed configuration of a distributed power supply vessel and an energy supply system including the same according to an embodiment of the present invention will be described with reference to the drawings.

Referring to FIG. 1 , the energy supply system 1 according to an embodiment of the present invention supplies hydrogen produced by reforming natural gas to the ship 10 when the ship 10 is anchored or waiting in a port, etc. , by using the hydrogen supplied to the ship 10 to produce electric power in the fuel cell 110 installed in the ship 10, and to use this power through the power transmission facility of the land station 20 provided on land, a regular power system (3) A distributed power supply system can be achieved by supplying power to the

To this end, the energy supply system 1 may include a distributed power supply vessel 10 and a land station 20 .

The vessel 10 includes a fuel cell 110 , a battery 120 , a switch board 130 , a propulsion motor 140 , a thruster 150 , a hydrogen fuel storage tank 160 , a heat exchanger 170 , and a water supply unit. 180 and a stack 190 may be included. The vessel 10 may be configured to be operated by using the fuel cell 110 as a main driving source to obtain propulsion, and the fuel cell 110 generates electricity using hydrogen as a fuel, and the generated electricity is used as a switch board. 130 and the battery 120, respectively. Electricity transmitted to the switch board 130 may be used to obtain propulsion by driving the propulsion motor 140 during cruising or operation, and is transmitted to the land station 20 during anchoring or standby to always power system (3) can be supplied as

In addition, the vessel 10 generates hydrogen gas from boil-off gas (BOG) generated in the hydrogen fuel storage tank 160 or liquefied hydrogen stored in the hydrogen fuel storage tank 160 and a hydrogen supply unit for supplying it to the fuel cell 110 . 162 and a ballast water treatment device 112 that generates ozone (O3) supplied to the ballast water of the ship 10 and supplies oxygen (O2) generated in the process of ozone generation to the fuel cell 110 . may further include.

Specifically, referring to FIG. 2 , the hydrogen supply unit 162 includes a liquefied hydrogen supply unit 1622 that compresses and vaporizes the liquefied gas stored in the hydrogen fuel storage tank 160 and supplies it to the fuel cell 110 , and hydrogen fuel storage. The boil-off gas supply unit 1624 for compressing the boil-off gas generated in the tank 160 and supplying it to the fuel cell 110 may be included.

The liquid hydrogen supply unit 1622 may include a hydrogen pump for compressing the liquid hydrogen stored in the hydrogen fuel storage tank 160, and a hydrogen vaporizer for vaporizing the liquid hydrogen compressed by the hydrogen pump, and the boil-off gas supply unit 1624. may include a plurality of compressors and a plurality of coolers for compressing the boil-off gas in multiple stages.

In addition, the hydrogen generated by the hydrogen supply unit 162 may be supplied to the anode side of the fuel cell 110 .

The ballast water treatment device 112 removes foreign substances such as harmful aquatic organisms and pathogens contained in the ballast water of the ship 10 to prevent destruction and disturbance of the marine ecosystem due to the movement of ballast water (ballast water) of the ship, It may include devices or facilities to detoxify or prevent its ingress or egress. As the ballast water treatment apparatus of a ship, there are largely ultraviolet irradiation, electrolysis, and ozone injection methods, and any one of these methods may be applied as the ballast water treatment apparatus 112 .

The ballast water treatment device 112 includes a compressor 1122 that receives and compresses air, an oxygen generator 1124 that generates oxygen from the air compressed by the compressor 1122, and ozone from the oxygen generated by the oxygen generator 1124. It may include an ozone generator 1126 for generating a ballast tank 1128 to which ozone generated from the ozone generator 1126 is supplied. Ballast water is stored in the ballast tank 1128.

Some of the oxygen generated by the oxygen generator 1124 of the ballast water treatment device 112 may be supplied to the cathode side of the fuel cell 110 . In this way, oxygen supplied to the cathode of the fuel cell 110 may cause an electrochemical reaction with hydrogen supplied to the anode to generate electricity. According to the fuel cell driving system of the vessel 10 , the fuel cell 110 is supplied with sufficient hydrogen using a large amount of boil-off gas generated in the hydrogen fuel storage tank 160 , and is supplied from the ballast water treatment device 112 . By receiving pure oxygen, a highly efficient fuel cell driving system can be constructed.

The fuel cell 110 may be configured in a unit module type by stacking tens or hundreds of unit cells in series to obtain a desired power generation output.

Returning to FIG. 1 , the battery 120 is connected to the fuel cell 110 and is provided to store electricity produced by the fuel cell 110 . The battery 120 may be provided, for example, as an ESS device capable of storing a large amount of electricity, but the spirit of the present invention is not limited thereto. In addition, the battery 120 may function as a kind of buffer (buffer) in preparation for a change in power demand required in the ship 10 . In addition, the battery 120 may be connected to the switch board 130 to selectively supply electricity to the switch board 130 .

The switch board 130 is connected to the propulsion motor 140 , and functions to supply power supplied from at least one of the fuel cell 110 and the battery 120 to the propulsion motor 140 . In this switch board 130, various types of devices having a control function and a display function and each controller may be configured in parallel. In addition, the switch board 130 may be provided so that the presence or absence of an abnormality and the operating state of the equipment can be easily checked because a microchip having an integrated program that can be integrated and controlled is embedded therein.

In addition, the switch board 130 is connected to the land station 20 when the ship 10 is anchored or on standby, and at least a portion of power transferred from the fuel cell 110 and/or the battery 120 to the switch board 130 . may be selectively transmitted to the land station 20 . To this end, the switch board 130 may include a power sensor capable of monitoring the amount of surplus power stored in the battery 120 , and electricity generated as the fuel cell 110 is continuously driven is transferred to the battery 120 . ) to be charged more than the reference power, while charging the battery 120 and controlling the remaining power to be appropriately transmitted to the land station 20 .

In addition, when the ship 10 is sailing or operating, power is supplied to the propulsion motor 140 to drive the thruster 150 so that the ship 10 can obtain propulsion. In addition, in addition to the propulsion motor 140 , it is possible to smoothly supply energy for driving the vessel 10 by controlling so that electricity is properly supplied to the power demanding destination of the vessel 10 . The control operation of the switch board 130 may be executed by a predetermined algorithm, and such an algorithm may be recorded in an embedded microchip. In addition, the control operation of the switch board 130 may be configured to be performed automatically or may be configured to be performed manually.

The propulsion motor 140 is provided to drive the propulsion unit 150 by using electricity supplied from at least one of the fuel cell 110 and the battery 120 as a power source. At this time, the electricity supplied to the propulsion motor 140 is transmitted from the fuel cell 110 and/or the battery 120 to the switch board 130 , and then, by the control operation of the switch board 130 , the propulsion motor ( As much power required for driving 140 may be supplied from the switch board 130 to the propulsion motor 140 . Here, the electric power required for the propulsion motor 140 may be determined according to the load acting during the operation of the vessel 10 , the input speed of the vessel 10 , and other control values.

The thruster 150 may be provided to provide thrust to the vessel 10 while rotating when the propulsion motor 140 is shaft-connected to drive the propulsion motor 140 . This thruster 150 may be provided, for example, as a thruster.

The hydrogen fuel storage tank 160 may be connected to the fuel cell 110 , store hydrogen therein, and supply the stored hydrogen to the fuel cell 110 . In this case, the hydrogen fuel storage tank 160 may store hydrogen in a liquid form, and may supply hydrogen in a vaporized state to the fuel cell 110 through the hydrogen supply unit 162 . In addition, when the ship 10 is anchored or on standby, the hydrogen fuel storage tank 160 is connected to the hydrogen loading tank 210 of the land station 20 to be described later to be provided to receive hydrogen from the hydrogen loading tank 210 . can Accordingly, when the ship 10 is anchored or on standby, it can serve as a small generator using the fuel cell 110 using liquid hydrogen stored in the hydrogen loading tank 210 of the land station 20 as a raw material. Accordingly, the energy supply system 1 may also be used for the purpose of supplying electric power to an area adjacent to the sea among mountainous or island regions where power supply and demand is not smooth.

The heat exchanger 170 may generate steam by exchanging the exhaust gas generated in the process of generating electricity in the fuel cell 110 with water. In the process of generating electricity in the fuel cell 110, oxygen and hydrogen are electrochemically reacted, and since this reaction corresponds to an exothermic reaction, steam is produced using high heat generated as a result of the reaction, and the produced steam is It can be transported to the land station 20 . In this way, when the vessel 10 is anchored or on standby, the steam generated in the heat exchanger 170 may be transferred to the natural gas reformer 220 of the onshore station 20 to be used for hydrogen production through reforming of natural gas. In other words, electricity and heat generated by the driving of the fuel cell 110 are transferred to the land station 20 , and the electricity transferred to the land station 20 is always transmitted to the electric power system 3 and sent to the demand. , heat is input to natural gas reforming and used for hydrogen production, and the hydrogen produced in this way is sent back to the hydrogen fuel storage tank 160 to be utilized as a fuel of the fuel cell 110 . Through this process, a virtuous cycle of energy can be made in the energy supply system 1 .

The water supply unit 180 may be provided to input water into the heat exchanger 170 , and the water supplied from the water supply unit 180 to the heat exchanger 170 exchanges heat with the exhaust gas transmitted to the heat exchanger 170 . Steam can be produced. However, this is only an example, and it may be configured such that water generated in the fuel cell 110 is collected in the form of steam in the heat exchanger and transmitted to the land station 20 . In addition, the exhaust gas that has passed through the heat exchanger 170 may be discharged to the outside through the stack 190 provided on the ceiling of the ship 10 .

The land station 20 may be installed on land adjacent to the sea, such as a port, and may be provided to supply hydrogen to the vessel 10 and to receive electricity from the vessel 10 . This onshore station 20 may include a hydrogen loading tank 210 , a natural gas reformer 220 , an inverter 230 and a transformer 240 .

The hydrogen loading tank 210 may be provided to be installed on land to load hydrogen therein. At this time, the stored hydrogen may be stored in the form of liquefied hydrogen, and may include an insulating wall and a reliquefaction facility for boil-off gas (BOG) for this purpose. In addition, the hydrogen loading tank 210 may be provided to receive and store the hydrogen produced by the natural gas reformer 220 .

The natural gas reformer 220 is installed on land to reform natural gas supplied through the natural gas supply line 2 to generate hydrogen, and supplies the generated hydrogen to the hydrogen loading tank 210 . In this case, the natural gas supply line 2 may correspond to a natural gas transport pipe extending from an external natural gas refining facility (not shown). Such natural gas may be, for example, LNG (Liquefied Natural Gas), PNG (Pipe Natural Gas), LPG (liquefied petroleum gas), and the like. In addition, the natural gas reformer 220 may receive steam from the ship 10 , and the steam delivered in this way may be used in a natural gas reforming process.

The inverter 230 is connected to the switch board 130 when the ship 10 is anchored or on standby to convert electricity transmitted from the switch board 130 into alternating current. The electricity converted into alternating current through the inverter 230 may be transmitted to the transformer 240 . The transformer 240 is provided to transform electricity converted into alternating current by the inverter 230 . In addition, the transformer 240 may step-up a voltage corresponding to the voltage of the regular power system 3 , and the electricity transformed by the transformer 240 in this way may be transmitted to the regular power system 3 .

On the other hand, a hydrogen transfer line extending from the hydrogen fuel storage tank 160 of the ship 10 and provided for the transfer of hydrogen, a power transmission line extending from the switch board 130 and provided for transmitting electric power and a heat exchanger ( All of the steam transfer lines extending from 170 and provided for transferring steam may have their ends connected to the first line connecting member 12 . In addition, a hydrogen transfer line extending from the hydrogen loading tank 210 of the land station 20 and provided for the transfer of hydrogen, a power transmission line extending from the inverter 230 and provided for transmitting electric power and a natural gas reformer ( All of the steam conveying lines extending from 220 and provided for conveying steam may have their ends connected to the second line connecting member 22 .

The first line connection member 12 and the second line connection member 22 may be provided so that male and female are separated and fastened to each other. In this case, a fastening member (not shown) capable of selectively releasing a fastening state may be additionally provided to the first line connecting member 12 and the second line connecting member 22 . When the first line connecting member 12 and the second line connecting member 22 are fastened to each other in this way, each line connected to the first line connecting member 12 and each line connected to the second line connecting member 22 are Each part in the ship 10 and each part in the land station 20 may be interconnected by fastening the first line connecting member 12 and the second line connecting member 22 to each other.

In addition, the first line connecting member 12 and the second line connecting member 22 may be further provided with a packing member for sealing on surfaces where they are fastened to each other, whereby the first line connecting member 12 and the second line connecting member 22 are In a state in which the line connecting members 22 are fastened to each other, it is possible to prevent hydrogen or steam from leaking to the fastening surface. In addition, the fastening surfaces of the first line connection member 12 and the second line connection member 22 are insulated except for the portion to which the power transmission line is connected, thereby preventing damage from leakage of high voltage power. can

In this way, since each part of the ship 10 and each part of the land station 20 can be connected at once by fastening the first line connecting member 12 and the second line connecting member 22 , the ship 10 . and docking of the land station 20 is facilitated.

According to the energy supply system 1 according to the embodiment of the present invention as described above, a vessel using an eco-friendly fuel such as hydrogen is supplied with fuel from the land during an anchoring or standby period, not during a sailing or sailing period, so that the fuel in the vessel is supplied. By producing electric energy with the battery and transmitting the generated power back to the land, it is possible to increase economic efficiency by increasing the constant operation rate of the fuel cell. It has the effect that it becomes possible to apply .

In addition, since the fuel cell is generally operated at a high temperature, it is difficult to turn on/off the fuel cell outside the maintenance period because it takes a lot of time in the initial stage of operation to maintain the operating temperature of the fuel cell. The high efficiency power produced through continuous operation can be utilized even in the midst of a continuous operation, which has the effect of minimizing the energy required in ports and the like.

Although the embodiments of the present invention have been described as specific embodiments, these are merely examples, and the present invention is not limited thereto, and should be construed as having the widest scope according to the basic idea disclosed herein. A person skilled in the art may implement a pattern of a shape not indicated by combining/substituting the disclosed embodiments, but this also does not depart from the scope of the present invention. In addition, those skilled in the art can easily change or modify the disclosed embodiments based on the present specification, and it is clear that such changes or modifications also fall within the scope of the present invention.

1: Energy supply system 10: Ship
110: fuel cell 120: battery
130: switch board 140: propulsion motor
150: propeller 160: hydrogen fuel storage tank
170: heat exchanger 180: water supply unit
190: stack 12: first line connection member
20: land station 210: hydrogen loading tank
220: natural gas reformer 230: inverter
240: transformer 22: second line connection member
2: Natural gas supply line 3: Continuous power grid

Claims (8)

a fuel cell that generates electricity using hydrogen as a fuel;
a battery connected to the fuel cell and storing electricity generated by the fuel cell;
a propulsion motor for driving a propulsion unit using electricity supplied from at least one of the fuel cell and the battery as a power source;
a switch board connected to the propulsion motor and supplying power supplied from at least one of the fuel cell and the battery to the propulsion motor; and
and a hydrogen fuel storage tank connected to the fuel cell, storing hydrogen therein, and supplying the stored hydrogen to the fuel cell,
When the switch board is connected to a land station during anchoring or standby, at least a portion of the power transmitted to the switch board is selectively transmitted to the land station, and is supplied to the power system at all times through the power transmission facility of the land station,
Decentralized Power Supply Vessels. According to claim 1,
The hydrogen fuel storage tank is connected to the land station and provided to receive hydrogen from the land station when anchored or on standby.
Decentralized Power Supply Vessels. 3. The method according to claim 1 or 2,
Further comprising a heat exchanger for generating steam by exchanging the exhaust gas generated in the process of generating electricity in the fuel cell with water,
The steam generated in the heat exchanger during anchoring or standby is delivered to the onshore station and used for hydrogen production through reforming of natural gas,
Decentralized Power Supply Vessels. 3. The method according to claim 1 or 2,
Further comprising a ballast water treatment device for preventing the inflow and discharge of foreign substances contained in the ballast water,
The ballast water treatment device,
Compressor for receiving air and compressing it;
an oxygen generator for generating oxygen from the air compressed by the compressor;
an ozone generator for generating ozone from the oxygen generated by the oxygen generator; and
and a ballast tank to which ozone generated from the ozone generator is supplied,
Some of the oxygen generated by the oxygen generator is supplied to the fuel cell,
Decentralized Power Supply Vessels. decentralized power supply vessels; and
and a land station provided to supply hydrogen to the distributed power supply vessel and to receive electricity from the distributed power supply vessel,
The distributed power supply vessel,
a fuel cell that generates electricity using hydrogen as a fuel;
a battery connected to the fuel cell and storing electricity generated by the fuel cell;
a propulsion motor for driving a propulsion unit using electricity supplied from at least one of the fuel cell and the battery as a power source;
a switch board connected to the propulsion motor and supplying power supplied from at least one of the fuel cell and the battery to the propulsion motor; and
and a hydrogen fuel storage tank connected to the fuel cell, storing hydrogen therein, and supplying the stored hydrogen to the fuel cell,
When the distributed power supply vessel is anchored or on standby, the switch board is connected to the land station so that at least a portion of the electric power transferred to the switch board is selectively transmitted to the land station, and through the power transmission facility of the land station supplied to the power grid at all times,
energy supply system. 6. The method of claim 5,
The land station is
a hydrogen loading tank installed on land and provided to load hydrogen therein; and
A natural gas reformer installed on land to reform natural gas supplied through a natural gas supply line to generate hydrogen, and a natural gas reformer for supplying the generated hydrogen to the hydrogen loading tank,
When the distributed power supply vessel is anchored or on standby, the hydrogen fuel storage tank is connected to the hydrogen loading tank and provided to receive hydrogen from the hydrogen loading tank,
energy supply system. 7. The method of claim 6,
The distributed power supply vessel,
Further comprising a heat exchanger for generating steam by exchanging the exhaust gas generated in the process of generating electricity in the fuel cell with water,
When the distributed power supply vessel is anchored or on standby, the steam generated in the heat exchanger is delivered to the natural gas reformer and used for hydrogen production through reforming of natural gas,
energy supply system. 8. The method according to any one of claims 5 to 7,
The land station is
an inverter connected to the switch board when the distributed power supply vessel is anchored or on standby to convert electricity transmitted from the switch board into AC; and
A transformer for transforming electricity converted into alternating current by the inverter,
Electricity transformed by the transformer is transmitted to the constant power system,
energy supply system.

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