JPWO2020044601A1 - Battery electric propulsion ship power supply system, offshore power supply equipment and battery electric propulsion ship - Google Patents

Abstract

Provided is a battery electric propulsion ship power supply system capable of charging a rechargeable battery of a battery electric propulsion ship without mooring the battery electric propulsion ship to a quay. The battery-electric propulsion vessel power supply system includes at least one battery-electric propulsion vessel and at least one offshore power generation facility capable of charging the storage battery of the battery-electric propulsion vessel.

Description

The present invention relates to a battery electric propulsion ship power supply system. The present invention also relates to an offshore power supply facility and a battery electric propulsion vessel that are suitably used for the battery electric propulsion vessel power supply system.

Conventionally, a battery-powered propulsion ship has been known (see, for example, Patent Document 1). A battery-powered propulsion vessel is a vessel that is propelled by the electric power stored in a storage battery without generating propulsive electric power in the vessel. Such a battery-powered propulsion ship does not emit combustion gas unlike a mechanical propulsion type ship using an internal combustion engine, and therefore has little impact on the environment.

Japanese Unexamined Patent Publication No. 2013-14222

Conventionally, when power is supplied to a battery-electric propulsion ship, the battery-electric propulsion ship is moored at the quay, and the rechargeable battery of the battery-electric propulsion ship is charged by a power supply device on land.

Therefore, an object of the present invention is to provide a battery-electric propulsion ship power supply system capable of charging a rechargeable battery of a battery-electric propulsion ship without mooring the battery-electric propulsion ship to a quay. Another object of the present invention is to provide an offshore power supply facility and a battery electric propulsion ship that are suitably used for the battery electric propulsion ship power supply system.

In order to solve the above problems, the battery electric propulsion ship power supply system of the present invention includes at least one battery electric propulsion ship and at least one offshore power supply facility capable of charging the storage battery of the battery electric propulsion ship. It is characterized by that.

According to the above configuration, the rechargeable battery of the battery electric propulsion vessel can be charged at sea without mooring the battery electric propulsion vessel to the quay.

The offshore power supply facility may be an offshore power generation ship that generates electricity using liquefied gas. According to this configuration, the position of the offshore power supply equipment can be changed according to the situation.

Liquefied gas may be supplied to the offshore power generation ship from a liquefied gas supply device on land. According to this configuration, the liquefied gas supply device on land is generally equipped with a plurality of large-capacity tanks for storing liquefied gas, so that the liquefied gas can be stably supplied to the offshore power generation ship when necessary. Can be done.

The at least one battery electric propulsion vessel includes a plurality of battery electric propulsion vessels, and the battery electric propulsion vessel power supply system includes the plurality of battery electric propulsion vessels and a management device capable of communicating with the offshore power generation vessel. The management device determines the optimum standby position of the offshore power generation vessel for supplying power to the plurality of battery electric propulsion vessels based on the operation data received from the plurality of battery electric propulsion vessels, and determines the determined standby position. It may be transmitted to the offshore power generation vessel. According to this configuration, the offshore power generation vessel can be moved to the optimum standby position for supplying power to a plurality of battery-powered propulsion vessels. As a result, the distance traveled by each battery-electric propulsion vessel for charging can be reduced.

The at least one battery electric propulsion ship includes a plurality of battery electric propulsion ships, the at least one offshore power generation facility includes a plurality of offshore power generation facilities, and the battery electric propulsion ship power supply system includes the plurality of batteries. A management device capable of communicating with the electric propulsion ship is provided, and the management device charges each of the plurality of battery electric propulsion ships with charging timing and charging based on operation data received from the plurality of battery electric propulsion ships. A charging schedule, including the identification of offshore power generation equipment to be received, may be determined and the determined charging schedule may be transmitted to the corresponding battery-powered propulsion vessel. According to this configuration, each battery electric propulsion vessel can be charged according to the charging schedule, and each battery electric propulsion vessel can efficiently carry out the operation.

The at least one battery electric propulsion vessel includes a plurality of battery electric propulsion vessels, and the battery electric propulsion vessel power supply system includes a management device capable of communicating with the plurality of battery electric propulsion vessels. Based on the operation data received from the plurality of battery-electric propulsion vessels, a ship allocation plan is made for the plurality of battery-electric propulsion vessels, and a navigation schedule including operations for each of the plurality of battery-electric propulsion vessels is determined and determined. The sailing schedule may be transmitted to the corresponding battery-powered propulsion vessel. According to this configuration, the ship allocation plan can be automated.

The management device sets the standby position of the offshore power generation vessel, the charging schedule of each of the plurality of battery electric propulsion vessels, and / or the navigation schedule of each of the plurality of battery electric propulsion vessels, and the plurality of battery electric propulsion vessels. It may be determined based on the operation data of the above and the machine learning result for the operation state data of the storage battery, the propeller drive motor and the propeller. According to this configuration, the charging time of each battery electric propulsion vessel is minimized and / or the operational efficiency of each battery electric propulsion vessel is maximized, and / or the storage battery of each battery electric propulsion vessel is used. Life can be maximized.

The battery electric propulsion ship power supply system may include at least one land power supply facility capable of charging the storage battery of the at least one battery electric propulsion ship. According to this configuration, the battery-powered propulsion vessel can be charged not only at sea but also on land.

The battery-electric propulsion ship power supply system includes at least one land power supply facility and a management device capable of communicating with the offshore power supply facility, and the management device acquires power price data for each predetermined time in the land power supply facility. Then, based on the operation data and the electric power price data received from the at least one battery electric propulsion vessel, the at least one battery electric propulsion vessel is used in any of the offshore power supply equipment and the land power supply equipment. You may decide whether to prioritize receiving power. Specifically, when the power price in the land power supply facility is lower than the power supply price in the offshore power supply facility, the management device supplies power with the land power supply facility among the offshore power supply facility and the land power supply facility. When a power supply command that gives priority to receiving is generated, the generated power supply command is transmitted to the at least one battery electric propulsion vessel, and the power price in the land power supply facility is higher than the power supply price in the offshore power supply facility. Generates a power supply command that gives priority to receiving power from the offshore power supply facility and the land power supply facility, and transmits the generated power supply command to the at least one battery electric propulsion vessel. You may. According to this configuration, the battery-electric propulsion ship is on land when the power price of the land power supply facility (commercial system) is lower than the power supply price of the offshore power generation ship (power price calculated from the power generation unit price of the offshore power generation ship). When power is received from the power supply facility and the power price of the land power supply facility is higher than the power supply price of the offshore power generation ship, the power can be received from the offshore power generation ship, so that the operating cost can be improved.

The offshore power supply facility is an offshore power generation ship configured to be able to supply surplus power to the land power supply facility, and in the management device, the power price in the land power supply facility is higher than the power supply price in the offshore power supply facility. In the case, based on the operation data received from the at least one battery electric propulsion ship, the optimum standby position of the offshore power generation ship for supplying power to the at least one battery electric propulsion ship is determined, and the determined standby position is determined. Is transmitted to the offshore power generation ship, and the management device sells the surplus power to the land power supply facility when the offshore power generation ship has surplus power after supplying power to the at least one battery electric propulsion ship. An electric power sale command may be transmitted to the offshore power generation ship. According to this configuration, when the power price of the onshore power supply facility is higher than the power supply price of the offshore power generation vessel, the offshore power generation vessel moves to the optimum position for supplying power to each battery electric propulsion vessel. The distance that the propulsion vessel travels for charging can be reduced. Further, since the offshore power generation ship can sell the surplus power to the land power supply facility after supplying power to each battery electric propulsion ship, the operating cost can be improved.

The at least one battery electric propulsion vessel includes a plurality of battery electric propulsion vessels, the plurality of battery electric propulsion vessels are configured to be able to supply surplus electric power to the land power supply facility, and the management device is configured to supply the land power supply. When the power price in the facility is higher than the power supply price in the offshore power supply facility, the surplus power is sold to the land power supply facility to the battery electric propulsion ship having surplus power among the plurality of battery electric propulsion ships. You may send a power sale command to make electricity. According to this configuration, when the power price in the land power supply facility is higher than the power supply price in the offshore power supply facility, the battery electric propulsion vessel having surplus power can sell the surplus power to the land power supply facility. .. Operating costs can be improved.

The at least one battery electric propulsion ship includes a plurality of battery electric propulsion ships, the at least one offshore power supply facility includes a plurality of offshore power supply facilities, and the battery electric propulsion ship power supply system includes the plurality of batteries. A management device capable of communicating with an electric propulsion ship is provided, and the management device acquires power price data for each predetermined time in the land power supply facility, and for each of the plurality of battery electric propulsion ships, the plurality of battery electricity. Based on the operation data received from the propulsion ship and the electric power price data, the charging schedule including the identification of the offshore power supply equipment or the land power supply equipment to be charged is determined, and the determined charging schedule corresponds to the battery electricity. It may be sent to the propulsion ship. According to this configuration, each battery-powered propulsion vessel can be charged at the optimum timing in either the offshore power generation facility or the land power supply facility according to the charging schedule determined based on the operation data and the power price data. This allows each battery-powered propulsion vessel to operate economically and efficiently.

The at least one battery electric propulsion vessel includes a plurality of battery electric propulsion vessels, and the battery electric propulsion vessel power supply system includes a management device capable of communicating with the plurality of battery electric propulsion vessels. The electric power price data for each predetermined time in the land power supply facility is acquired, and the ship allocation plan for the plurality of battery electric propulsion vessels is performed based on the operation data received from the plurality of battery electric propulsion vessels and the electric power price data. The navigation schedule including the operation for each of the plurality of battery-electric propulsion vessels may be determined, and the determined navigation schedule may be transmitted to the corresponding battery-electric propulsion vessel. According to this configuration, the ship allocation plan can be automated, and the battery-powered propulsion vessel can improve the operating cost by navigating according to the navigation schedule determined based on the operation data and the electric power price data. Can be done.

The at least one offshore power supply facility may have a configuration capable of receiving power from the land power supply facility. Specifically, the offshore power supply facility is an offshore power generation ship equipped with a generator, and the battery-electric propulsion ship power supply system is managed so as to be able to communicate with the at least one onshore power supply facility and the offshore power generation ship. When the power generated by the offshore power generator is insufficient, the management device acquires power price data for each predetermined time in the land power supply facility, and the management device obtains power price data for each predetermined time based on the power price data. It may be decided whether to generate electricity on an offshore power generator or to receive power from the onshore power supply facility. According to this configuration, it is decided whether to supply the power generated by the offshore power generation ship to the battery electric propulsion ship or the power supplied from the land power supply facility to the battery electric propulsion ship according to the power price. Therefore, the operating cost can be improved.

Further, the offshore power generation facility of the present invention is an offshore power generation facility for charging a storage battery of a battery-electric propulsion ship, and is connected to a generator, a storage battery for storing electric power generated by the generator, and the storage battery. It is characterized by including a power feeding device. Such an offshore power generation facility can be suitably used for the above-mentioned battery electric propulsion ship power supply system.

For example, the offshore power generation facility may further include a tank for storing the liquefied gas and an internal combustion engine connected to the generator for burning the liquefied gas or the vaporized gas thereof.

Further, the battery-electric propulsion ship of the present invention is characterized by including a communication device for transmitting operation data of the battery-electric propulsion ship. Such a battery-electric propulsion vessel can be suitably used for the above-mentioned battery-electric propulsion vessel power supply system.

According to the present invention, the rechargeable battery of the battery electric propulsion vessel can be charged without mooring the battery electric propulsion vessel to the quay.

It is a schematic block diagram of the battery electric propulsion ship power supply system which concerns on 1st Embodiment of this invention. It is a graph which shows an example of the power supply and demand situation in a land power supply facility. It is a schematic block diagram of the battery electric propulsion ship power supply system which concerns on 2nd Embodiment of this invention. It is a figure which shows the mode that the power supply equipment is specified according to the charge schedule. It is a graph which shows an example of the navigation schedule of a battery-electric propulsion vessel. It is a figure which shows an example of the route according to the navigation schedule.

(First Embodiment)
FIG. 1 shows a battery electric propulsion ship power supply system 1 according to the first embodiment of the present invention. The power supply system 1 includes a plurality of battery-electric propulsion vessels 2, a plurality of offshore power generation vessels 3 (corresponding to the offshore power supply equipment of the present invention), and a management device 5. However, the number of battery-electric propulsion vessels 2 may be one, or the number of offshore power generation vessels 3 may be one.

In FIG. 1, the power supply system 1 is constructed for one bay 11 including two ports 12 and 13, but the power supply system 1 may be constructed across a plurality of bays.

In the present embodiment, each battery-electric propulsion vessel 2 is a coastal vessel that navigates the domestic sea area. The domestic sea area may be a domestic sea area in Japan or a foreign domestic sea area. Alternatively, if multiple countries are adjacent, the domestic waters may be the domestic waters of those countries. Furthermore, each battery-electric propulsion vessel 2 may be an ocean-going vessel engaged in international voyages.

For example, the battery-electric propulsion ship 2 is a tugboat, a ferry, various distribution ships (container ship, oil tanker, general cargo ship, chemical ship) and the like. For example, a tugboat carries out an operation to tow a large ship, and a container ship carries out an operation to transport a container between ports. The operation for each battery electric propulsion vessel 2 is changed daily.

Specifically, although not shown, each battery electric propulsion vessel 2 includes a propeller drive motor for driving a propeller and a storage battery for supplying electric power to the propeller drive motor. The storage battery is charged by being connected to a power supply device described later of the offshore power generation vessel 3.

Each offshore power generation vessel 3 is a vessel capable of charging the storage battery of the battery electric propulsion vessel 2 that generates electricity using liquefied gas. The liquefied gas is, for example, LNG (Liquefied Natural Gas), liquefied hydrogen, or the like. In the present embodiment, each offshore power generation vessel 3 supplies power to each battery electric propulsion vessel 2 to charge the storage battery of the battery electric propulsion vessel 2. However, the storage battery of the battery electric propulsion vessel 2 does not necessarily have to be charged on the battery electric propulsion vessel 2. For example, when the battery electric propulsion vessel 2 is navigating, the replacement storage battery is charged on the offshore power generation vessel 3, and the battery electric propulsion vessel 2 is moored on the offshore power generation vessel 3, the battery electric propulsion vessel 2 is moored. The storage battery of 2 may be replaced with a charged storage battery.

Specifically, although not shown, each offshore power generator 3 includes a tank for storing liquefied gas, an internal combustion engine for burning the liquefied gas or its vaporized gas, a generator connected to the internal combustion engine, and a generator. Includes a storage battery that stores the power generated in, and a power supply device connected to the storage battery.

The internal combustion engine of each offshore power generation vessel 3 may be a reciprocating engine or a gas turbine engine. Alternatively, a gas-fired boiler and a steam turbine may be adopted instead of the internal combustion engine. When the liquefied gas is liquefied hydrogen, each offshore power generation vessel 3 may include a fuel cell that generates electricity by reacting hydrogen with oxygen.

In this embodiment, the power supply system 1 further includes a plurality of liquefied gas supply devices 4 installed on land. Each liquefied gas supply device 4 supplies liquefied gas to any of the offshore power generation vessels 3. For example, each liquefied gas supply device 4 includes a plurality of large-capacity tanks for storing liquefied gas.

In FIG. 1, two liquefied gas supply devices 4 are provided at ports 12 and 13, respectively, and one liquefied gas supply device 4 is provided at a quay that is not a port. Then, an offshore power generation vessel 3 is moored at the quay in the vicinity of the liquefied gas supply device 4.

On the other hand, there is also an offshore power generation vessel 3 located at a position away from the quay (in FIG. 1, the offshore power generation vessel 3 located at the lowest position). The offshore power generation vessel 3 may be moored at that position by an anchor, or may be held at that position by a thruster without using an anchor. The supply of liquefied gas to the offshore power generation vessel 3 is performed by replacing the offshore power generation vessel 3 with another offshore power generation vessel 3.

Although the management device 5 is installed on land in the present embodiment, it may be installed, for example, in a floating offshore base. Alternatively, the management device 5 may be mounted on any of the offshore power generation vessels 3. In addition, the management device 5 may be mounted on each of the plurality of battery-powered propulsion vessels 2 or the offshore power generation vessel 3. Further, an information sharing system is constructed in which each management device 5 mounted on each ship shares information with each other, and the ship equipped with each management device 5 autonomously manages based on the shared information. It may be provided with such a configuration.

The management device 5 is capable of communicating with the battery-powered propulsion vessel 2 and the offshore power generation vessel 3. Although not shown, each battery-powered propulsion vessel 2 includes a communication device and a processing device in addition to the above-described configuration. Similarly, each offshore power generation vessel 3 and management device 5 also includes a communication device and a processing device. For example, the processing device is a computer having a memory such as a ROM or a RAM, a storage such as an HDD, and a CPU, and a program stored in the ROM or the HDD is executed by the CPU.

The operator of each battery-electric propulsion vessel 2 inputs the operation information of the battery-electric propulsion vessel 2 into the processing device on a daily basis. The operation information includes the port and time of departure, the port and time of arrival, and the content of the operation.

The communication device of each battery electric propulsion vessel 2 transmits the operation information input to the processing device to the management device 5 as operation data. Further, the communication device of each battery electric propulsion ship 2 also transmits the capacity of the storage battery of the battery electric propulsion ship 2 and the remaining battery level to the management device 5 as operation data. Further, the operation data may include the propulsion power load of each battery-electric propulsion ship 2, the inboard power load other than propulsion, the ship speed, and the like.

Further, the communication device of each battery electric propulsion ship 2 may transmit the operation state data of the storage battery, the propeller drive motor, and the propeller to the management device 5 together with the operation data of the battery electric propulsion ship 2.

The operation data transmitted from each battery-electric propulsion vessel 2 is received by the communication device of the management device 5. The processing device of the management device 5 determines the optimum standby position of each offshore power generation vessel 3 for supplying power to all the battery electric propulsion vessels 2 based on the operation data of each battery electric propulsion vessel 2. The communication device of the management device 5 transmits the standby position of each offshore power generation vessel 3 determined by the processing device to each offshore power generation vessel 3.

The standby position transmitted from the management device 5 is received by the communication device of each offshore power generation vessel 3 and output to a monitor or the like by the processing device. The operator of each offshore power generation vessel 3 moves the offshore power generation vessel 3 to the standby position.

Further, the processing device of the management device 5 determines the charging schedule for each battery electric propulsion vessel 2 based on the operation data of all the battery electric propulsion vessels 2. The charging schedule includes the timing of charging and the identification of the offshore power vessel 3 to be charged. The communication device of the management device 5 transmits the charging schedule of each battery electric propulsion vessel 2 determined by the processing device to the corresponding battery electric propulsion vessel 2.

The charging schedule transmitted from the management device 5 is received by the communication device of each battery electric propulsion vessel 2 and output to a monitor or the like by the processing device. The operator of each battery-powered propulsion vessel 2 operates the battery-powered propulsion vessel 2 so as to receive charging from the specified offshore power generation vessel 3 during the operation according to the charging schedule.

Further, the processing device of the management device 5 acquires sea weather data including wave information and wind information from an external organization such as the Japan Meteorological Agency via the Internet or the like. Then, the processing device determines whether or not power can be supplied from the offshore power generation vessel 3 to the battery electric propulsion vessel 2 based on the sea weather data.

In the power supply system 1 having the configuration described above, the rechargeable battery of the battery electric propulsion vessel 2 can be charged at sea without mooring the battery electric propulsion vessel 2 to the quay.

Further, in the present embodiment, since the management device 5 determines the optimum standby position for supplying power to all the battery electric propulsion vessels 2, the offshore power generation vessel 3 can be moved to the standby position. As a result, the distance traveled by each battery-electric propulsion vessel 2 for charging can be reduced.

Further, in the present embodiment, since the management device 5 determines the charging schedule of each battery electric propulsion vessel 2, each battery electric propulsion vessel 2 can be charged according to the charging schedule. Therefore, each battery-electric propulsion vessel 2 can efficiently carry out the operation.

(Modification example)
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

For example, the offshore power generation facility of the present invention does not necessarily have to be an offshore power generator 3 that uses liquefied gas to generate electricity, and may be a floating power generation facility that generates electricity by offshore wind power and is fixed at a fixed position. .. However, if the offshore power generation facility is the offshore power generation ship 3 as in the above embodiment, the position of the offshore power generation facility can be changed depending on the situation. Further, the offshore power generation vessel 3 that generates electricity using liquefied gas can comply with the recent strict environmental regulations, unlike the case where oil such as heavy oil is used as fuel.

Further, the offshore power generation ship 3 does not necessarily have to be supplied with the liquefied gas from the liquefied gas supply device 4 on land, and the liquefied gas may be supplied from the liquefied gas supply device at sea. Examples of such an offshore liquefied gas supply device include a floating liquefied gas base and a liquefied gas transport ship. However, if the liquefied gas is supplied from the onshore liquefied gas supply device 4 to the offshore power generation ship 3 as in the above embodiment, the onshore liquefied gas supply device 4 generally has a large capacity tank for storing the liquefied gas. Is equipped with a plurality of liquefied gas, so that the liquefied gas can be stably supplied to the offshore power generation ship 3 when necessary.

Further, the management device 5 makes a ship allocation plan for all the battery electric propulsion vessels 2 based on the operation data of all the battery electric propulsion vessels 2 every day, and sets a navigation schedule including the operation for each battery electric propulsion vessel 2. The determined and determined navigation schedule may be transmitted to the corresponding battery-powered propulsion vessel 2. According to this configuration, the ship allocation plan can be automated.

Further, the management device 5 sets the standby position of each offshore power generation vessel 3, the charging schedule of each battery electric propulsion vessel 2, and / or the navigation schedule of each battery electric propulsion vessel 2 as the operation data of all the battery electric propulsion vessels 2. In addition, the determination may be made based on the machine learning results for the operating state data of the storage battery, the propeller drive motor, and the propeller. According to this configuration, the charging time of each battery electric propulsion vessel 2 is minimized and / or the operational efficiency of each battery electric propulsion vessel 2 is maximized, and / or each battery electric propulsion vessel 2 is used. The life of the storage battery can be maximized.

Further, in the above-described embodiment, it is assumed that the operator is on board each battery-electric propulsion vessel 2, but each battery-electric propulsion vessel 2 may be an unmanned vessel. In this case, the battery-electric propulsion vessel 2 is autopiloted based on the charging schedule, the navigation schedule, and the like transmitted from the management device 5. Similarly, each offshore power generation vessel 3 may also be an unmanned vessel.

(Second Embodiment)
The present inventors have diligently studied in order to improve the efficiency of the operating cost of the power supply system 1. In recent years, while the use of nuclear energy has been severely restricted, renewable energy such as solar power generation has begun to be actively used. Therefore, the present inventors have focused on such onshore power supply equipment and examined its applicability.

FIG. 2 is a graph showing an example of the power supply and demand situation in the land power supply facility. Here, the power supply and demand situation of one day in summer is shown. In this land power supply facility, thermal power generation, solar power generation, wind power generation, and hydroelectric power generation are carried out, but nuclear power generation is not carried out. As shown in FIG. 2, since this land power supply facility depends on thermal power generation and solar power generation, there is excess power on land during the daytime (6:00 to 18:00), and the power price of the land power supply facility. Will be low. On the other hand, at night (18:00 to 6:00), the power becomes insufficient on land, and the power price in the land power supply facility becomes high. Therefore, the inventors compared and examined the electric power price of the land power supply facility, which fluctuates depending on the time and weather conditions, and the electric power price calculated from the power generation unit price of the offshore power generation ship. As a result, which power supply facility should be prioritized to receive power from the battery-powered propulsion vessel according to the operation data received from the battery-electric propulsion vessel and the power supply price at the offshore power supply facility and the power price at the land power supply facility? It was found that the operating cost of the entire power supply system can be improved by deciding.

Further, in order to stably supply the electric power generated by the onshore power supply facility of FIG. 2, it is necessary to have a viewpoint of sustaining the operation in the state where the power generation efficiency is the highest. On the other hand, assuming that thermal power generation has stopped, the amount of power required is required at night when solar power is not generated, or when the expected amount of solar power cannot be obtained due to sunshine conditions even in the daytime. There is a problem that it cannot be secured. Therefore, the inventors assumed surplus power of the offshore power supply ship and the battery electric propulsion ship at the time of system operation, and examined the cost-effectiveness when selling these surplus power to the land power supply facility. As a result, if each of the offshore power supply ship and the battery electric propulsion ship has surplus power, sell them to the land power supply facility according to the power supply price in the offshore power supply facility and the power price in the land power supply facility. As a result, it was found that the operating cost of the entire power supply system can be further improved.

The present inventors have conceived the present invention based on the above findings. Hereinafter, embodiments embodying the present invention will be described with reference to the accompanying drawings.

FIG. 3 shows the battery electric propulsion ship power supply system 1A according to the second embodiment of the present invention. As shown in FIG. 3, the power supply system 1A of the present embodiment is different from the first embodiment (FIG. 1) in that it includes a land power supply facility 20 installed on land. In FIG. 3, one land power supply facility 20 capable of charging the storage battery of the battery electric propulsion vessel 2 is provided at the port 13. However, the number of land power supply facilities 20 may be plural.

The land power supply facility 20 is, for example, a commercial system. The land power supply facility 20 includes a power supply station 21, a thermal power generation system 22, a solar power generation system 23, a wind power generation system 24, and a hydroelectric power generation system 25. However, the land power supply facility 20 may include a power generation system using other natural energy. The power supply station 21 has a configuration capable of supplying the electric power generated by each of the power generation systems 22 to 25 to the battery electric propulsion vessel 2 to charge the storage battery of the battery electric propulsion vessel 2. However, the storage battery of the battery electric propulsion vessel 2 does not necessarily have to be charged at the power supply station 21. For example, when the battery electric propulsion ship 2 is navigating, the replacement storage battery is charged at the power supply station 21, and the battery electric propulsion ship 2 is moored at the port 13, the storage battery of the battery electric propulsion ship 2 May be replaced with a charged storage battery. Although not shown, the power supply station 21 includes a communication device and a processing device in addition to the above-described configuration.

Further, in the land power supply facility 20, the battery electric propulsion ship 2 and the offshore power generation ship 3 can sell the surplus electric power charged in the storage battery. That is, each battery electric propulsion vessel 2 is configured to be able to supply surplus electric power to the land power supply facility 20 (power supply station 21). Similarly, the offshore power generation vessel 3 is also configured to be able to supply surplus electric power to the onshore power supply facility 20.

The management device 5 is configured to be communicable with the land power supply facility 20, and is configured to be able to acquire power price data for each predetermined time in the land power supply facility 20 from the land power supply facility 20. The management device 5 may directly receive the electric power price data from the land power supply equipment 20, or may indirectly receive the electric power price data from other equipment via the network.

In the present embodiment, the management device 5 acquires the power price data for each predetermined time in the land power supply equipment 20 and compares the power price in the land power supply equipment 20 with the power supply price in the offshore power generation ship 3. The power supply price of the offshore power generation vessel 3 refers to the electric power price calculated from the power generation unit price of the offshore power generation vessel 3. When the power price of the land power supply facility 20 is lower than the power supply price of the offshore power generation vessel 3, the management device 5 supplies the offshore power generation vessel 3 and the land power supply based on the operation data received from all the battery electric propulsion vessels 2. A power supply command that gives priority to receiving power from the land power supply facility 20 of the equipment 20 is generated, and the generated power supply command is transmitted to each battery electric propulsion vessel 2. The power supply command transmitted from the management device 5 is received by the communication device of each battery electric propulsion vessel 2 and output to a monitor or the like by the processing device. The operator of each battery-powered propulsion vessel 2 operates the battery-powered propulsion vessel 2 so as to receive a charge from the land power supply facility 20 during the operation in accordance with the power supply command.

On the other hand, when the electric power price in the land power supply facility 20 is higher than the power supply price of the offshore power generation vessel 3, the management device 5 is based on the operation data received from all the battery-electric propulsion vessels 2 and the offshore power generation vessel 3 and A power supply command is generated so as to give priority to receiving power from the offshore power generation vessel 3 of the land power supply equipment 20, and the generated power supply command is transmitted to each battery electric propulsion vessel 2. The power supply command transmitted from the management device 5 is received by the communication device of each battery electric propulsion vessel 2 and output to a monitor or the like by the processing device. The operator of each battery-powered propulsion vessel 2 operates the battery-powered propulsion vessel 2 so as to receive a charge from the specified offshore power generation vessel 3 during the operation in accordance with the power supply command. The management device 5 may send a power selling command to the battery electric propulsion vessel 2 having surplus power to sell the surplus power to the land power supply facility 20 between operations.

At this time, the management device 5 determines and determines the optimum standby position of the offshore power generation vessel 3 for supplying power to all the battery electric propulsion vessels 2 based on the operation data received from all the battery electric propulsion vessels 2. The standby position is transmitted to the offshore power generation vessel 3. The standby position transmitted from the management device 5 is received by the communication device of each offshore power generation vessel 3 and output to a monitor or the like by the processing device. The operator of each offshore power generation vessel 3 moves the offshore power generation vessel 3 to the standby position. Further, after the power is supplied from the offshore power generation ship 3 to all the battery electric propulsion ships 2, the management device 5 sells the surplus power to the land power supply facility 20 when the offshore power generation ship 3 has surplus power. Power sale command is transmitted to the offshore power generation ship 3.

In the power supply system 1A having the configuration described above, when the power price of the land power supply facility 20 is lower than the power supply price of the offshore power generation ship 3, the battery electric propulsion ship 2 receives power from the land power supply facility 20 and receives power from the land power supply facility 20. When the electric power price of 20 is higher than the power supply price of the offshore power generation ship 3, the power can be received from the offshore power generation ship 3, so that the operating cost can be improved.

Further, in the present embodiment, when the power price of the land power supply facility 20 is higher than the power supply price of the offshore power generation ship 3, the offshore power generation ship 3 moves to the optimum position for power supply to each battery electric propulsion ship 2. Therefore, the distance traveled by each battery-electric propulsion vessel 2 for charging can be reduced. Further, since the offshore power generation ship 3 can sell the surplus power to the land power supply facility 20 after supplying power to each battery electric propulsion ship 2, the operating cost can be improved.

Further, in the present embodiment, when the electric power price in the land power supply facility 20 is higher than the power supply price in the offshore power generation ship 3, the surplus power of the plurality of battery electric propulsion ships 2 is generated in each battery electric propulsion ship 2. It is necessary even if the land power supply facility 20 cannot obtain the expected amount of solar power generation at night or due to sunshine conditions by supplying the surplus electricity to the existing battery electric propulsion ship 2 to the land power supply facility 20. It is possible to secure a large amount of electric power. Operating costs can be improved.

(Modification example)
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

For example, the management device 5 acquires the electric power price data for each predetermined time in the land power supply facility 20, and charges each battery electric propulsion vessel 2 based on the operation data and the electric power price data received from all the battery electric propulsion vessels 2. You may decide the schedule. However, the charging schedule includes the charging timing and the identification of the offshore power generation vessel 3 or the land power supply facility 20 to be charged. The communication device of the management device 5 transmits the charging schedule of each battery electric propulsion vessel 2 determined by the treatment device to the corresponding battery electric propulsion vessel 2.

FIG. 4 shows how the power supply equipment is specified according to the charging schedule. Here, for convenience of explanation, only one battery-powered propulsion vessel 2 and one offshore power generation vessel 3 that need to be charged are shown at sea. In FIG. 4, the movement route 30 shows the route from the battery electric propulsion vessel 2 to the offshore power generation vessel 3, and the route 31 shows the route from the battery electric propulsion vessel 2 to the land power supply facility 20. The amount of movement of the route 30 and the route 31 is the same. Since the charging schedule reflects the electric power price data, the electric power supply equipment having a low electric power price (for example, the offshore power generation vessel 3) is specified here as the electric power supply equipment to which the battery electric propulsion vessel 2 should receive the electric power. According to this configuration, each battery electric propulsion vessel 2 is charged at the optimum timing in either the offshore power generation vessel 3 or the land power supply equipment 20 according to the charging schedule determined based on the operation data and the electric power price data. This allows each battery-powered propulsion vessel 2 to carry out operations economically and efficiently.

Further, the management device 5 makes a ship allocation plan for all the battery electric propulsion vessels 2 based on the operation data and the electric power price data received from all the battery electric propulsion vessels 2 on a daily basis, and for each battery electric propulsion vessel 2. The navigation schedule including the operation may be determined, and the determined navigation schedule may be transmitted to the corresponding battery-electric propulsion vessel 2.

FIG. 5 is a graph showing an example of the daily navigation schedule of the battery-powered propulsion vessel 2. The vertical axis of FIG. 5 shows the electric power required for each operation of the battery-powered propulsion vessel 2. FIG. 6 is a diagram showing an example of the route 32 according to the navigation schedule. Here, for convenience of explanation, the battery-powered propulsion vessel 2 and the offshore power generation vessel 3 are shown one by one, and the route 32 shows the schedule in the morning. First, as shown in FIG. 6, the battery-powered propulsion vessel 2 departs from one port 12 in the morning according to the navigation schedule (transit). Then, the battery-powered propulsion vessel 2 stands by offshore near the entrance of the bay 11. Next, the battery-powered propulsion vessel 2 escorts the large vessel 6 arriving offshore to the other port 13. Finally, the battery-electric propulsion vessel 2 is installed on the quay of the port 13 to moor the large vessel 6 (bollard). This is the end of the morning work. The battery-powered propulsion vessel 2 will start work in the afternoon again after being suspended for a certain period of time at the port 13. Here, the battery-electric propulsion vessel 2 needs to be charged several times a day due to the limitation of the capacity of the storage battery. In the interim time zone, power can be received by either power supply facility according to the power supply price of the offshore power generation vessel 3 and the power supply price of the land power supply facility 20.

According to this configuration, the ship allocation plan can be automated, and the battery-electric propulsion ship 2 improves the operating cost by navigating according to the navigation schedule determined based on the operation data and the electric power price data. be able to.

In the above embodiment, the offshore power generation ship 3 exclusively supplies the electric power generated by the generator to the battery electric propulsion ship 2 and the land power supply facility 20, but the offshore power generation ship 3 supplies power from the land power supply facility 20. It may have a configuration that can be received. For example, the electric power generated by the power generation systems 22 to 25 of the land power supply facility 20 may be supplied to the offshore power generation vessel 3 to charge the storage battery of the offshore power generation vessel 3 (see FIG. 3).

The management device 5 is configured to be communicable with the offshore power generation vessel 3, and receives operation data including the operation information of the offshore power generation vessel 3, the capacity of the storage battery of the offshore power generation vessel 3, the remaining battery level, and the like.

The management device 5 acquires the electric power price data for each predetermined time in the land power supply facility 20, and based on the operation data and the electric power price data received from the offshore power generation ship 3, the power generated by the offshore power generation ship 3 is insufficient. In that case, it is determined whether the offshore power generation ship 3 generates power or the land power supply facility 20 receives power. Specifically, the management device 5 generates a command to give priority to receiving power from the land power supply facility 20 when the power price at the land power supply facility 20 is lower than the power supply price from the offshore power generation ship 3. , The generated power supply command is transmitted to the offshore power generation ship 3. On the other hand, when the electric power price in the land power supply facility 20 is higher than the power supply price of the offshore power generation vessel 3, a command is generated so as to give priority to power generation by the offshore power generation vessel 3, and the generated command is issued to the offshore power generation vessel 3. Send to. In this way, depending on the power price, whether the power generated by the offshore power generation ship 3 is supplied to the battery electric propulsion ship 2 or the power supplied from the land power supply facility 20 is supplied to the battery electric propulsion ship 2. Since it is decided, the operating cost can be improved.

Further, in the above embodiment, the offshore power generation ship 3 uses liquefied gas to generate power, but LPG (Liquefied Petroleum Gas), biofuel, or hydrogen may be used to generate power. In addition, the "offshore power supply equipment" of the present invention does not necessarily have to be equipped with a power generation equipment. For example, even if a pre-charged replacement storage battery is loaded on an offshore vessel and the charged storage battery is replaced with the storage battery of the battery electric propulsion vessel 2 when the battery electric propulsion vessel 2 is moored on the offshore vessel. good. Further, the electric power charged in the storage battery of the offshore ship may be supplied to the storage battery of the battery electric propulsion ship 2 via a cable.

1,1A Battery Electric Propulsion Vessel Power Supply System 2 Battery Electric Propulsion Vessel 3 Offshore Power Generation Vessel (Offshore Power Supply Equipment)
4 Liquefied gas supply device 5 Management device 6 Large ship 20 Land power supply equipment 21 Power supply station 22 Thermal power generation system 23 Solar power generation system 24 Wind power generation system 25 Hydroelectric power generation system 30, 31 Route 32 Route

The at least one battery electric propulsion ship includes a plurality of battery electric propulsion ships, the at least one offshore power supply facility includes a plurality of offshore power supply facilities , and the battery electric propulsion ship power supply system includes the plurality of batteries. A management device capable of communicating with the electric propulsion vessel is provided, and the management device charges each of the plurality of battery electric propulsion vessels with charging timing and charging based on operation data received from the plurality of battery electric propulsion vessels. A charging schedule, including the identification of offshore power supply equipment to be received, may be determined and the determined charging schedule may be transmitted to the corresponding battery-powered propulsion vessel. According to this configuration, each battery electric propulsion vessel can be charged according to the charging schedule, and each battery electric propulsion vessel can efficiently carry out the operation.

The at least one battery electric propulsion ship includes a plurality of battery electric propulsion ships, the at least one offshore power supply facility includes a plurality of offshore power supply facilities, and the battery electric propulsion ship power supply system includes the plurality of batteries. A management device capable of communicating with an electric propulsion ship is provided, and the management device acquires power price data for each predetermined time in the land power supply facility, and for each of the plurality of battery electric propulsion ships, the plurality of battery electricity. Based on the operation data received from the propulsion ship and the electric power price data, the charging schedule including the identification of the offshore power supply equipment or the land power supply equipment to be charged is determined, and the determined charging schedule corresponds to the battery electricity. It may be sent to the propulsion vessel. According to this configuration, each battery-electric propulsion vessel can be charged at the optimum timing in either the offshore power supply facility or the land power supply facility according to the charging schedule determined based on the operation data and the power price data. This allows each battery-powered propulsion vessel to operate economically and efficiently.

The at least one offshore power supply facility may have a configuration capable of receiving power from the land power supply facility. Specifically, the offshore power supply facility is an offshore power generation ship equipped with a generator, and the battery-electric propulsion ship power supply system is managed so as to be able to communicate with the at least one onshore power supply facility and the offshore power generation ship. A device is provided, and the management device acquires power price data for each predetermined time in the land power supply facility, and if the power generated by the offshore power generator is insufficient based on the power price data, the above-mentioned It may be decided whether to generate electricity on an offshore power generator or to receive power from the onshore power supply facility. According to this configuration, it is decided whether to supply the power generated by the offshore power generation ship to the battery electric propulsion ship or the power supplied from the land power supply facility to the battery electric propulsion ship according to the power price. Therefore, the operating cost can be improved.

Moreover, offshore supply facility of the present invention is a sea power supply facility for charging the battery of the battery electric propulsion boats, and battery for power storage and electric generator, the power generated by the generator, which is connected to the battery It is characterized by including a power feeding device. Such an offshore power supply facility can be suitably used for the above-mentioned battery electric propulsion ship power supply system.

For example, the offshore power supply equipment may further include a tank for storing the liquefied gas and an internal combustion engine connected to the generator for burning the liquefied gas or the vaporized gas thereof.

For example, the offshore power supply facility of the present invention does not necessarily have to be an offshore power generator 3 that generates electricity using liquefied gas, and may be a floating power generation facility that generates electricity by offshore wind power and is fixed at a fixed position. .. However, if the offshore power supply facility is the offshore power generation vessel 3 as in the above embodiment, the position of the offshore power supply facility can be changed depending on the situation. Further, the offshore power generation vessel 3 that generates electricity using liquefied gas can comply with the recent strict environmental regulations, unlike the case where oil such as heavy oil is used as fuel.

Claims (19)

With at least one battery electric propulsion vessel,
At least one offshore power supply facility capable of charging the storage battery of the battery electric propulsion vessel, and
Equipped with a battery electric propulsion ship power supply system. The battery-electric propulsion ship power supply system according to claim 1, wherein the offshore power supply facility is an offshore power generation ship that generates electricity using liquefied gas. The battery-electric propulsion ship power supply system according to claim 2, wherein the liquefied gas is supplied to the offshore power generation ship from a liquefied gas supply device on land. The at least one battery electric propulsion vessel includes a plurality of battery electric propulsion vessels.
It is equipped with a management device capable of communicating with the plurality of battery-powered propulsion vessels and the offshore power generation vessel.
The management device determines the optimum standby position of the offshore power generation vessel for supplying power to the plurality of battery-electric propulsion vessels based on the operation data received from the plurality of battery-electric propulsion vessels, and determines the determined standby position. The battery-electric propulsion ship power supply system according to claim 2 or 3, which is transmitted to the offshore power generation ship. The at least one battery electric propulsion vessel includes a plurality of battery electric propulsion vessels.
The at least one offshore power supply facility includes a plurality of offshore power supply facilities.
It is equipped with a management device capable of communicating with the plurality of battery-powered propulsion vessels.
The management device sets a charging schedule for each of the plurality of battery-electric propulsion vessels, including charging timing and identification of offshore power generation equipment to be charged, based on operation data received from the plurality of battery-electric propulsion vessels. The battery-electric propulsion ship power supply system according to any one of claims 1 to 4, which determines and transmits the determined charging schedule to the corresponding battery-electric propulsion ship. The at least one battery electric propulsion vessel includes a plurality of battery electric propulsion vessels.
It is equipped with a management device capable of communicating with the plurality of battery-powered propulsion vessels.
Based on the operation data received from the plurality of battery-electric propulsion vessels, the management device makes a ship allocation plan for the plurality of battery-electric propulsion vessels and includes an operation for each of the plurality of battery-electric propulsion vessels. The battery-electric propulsion ship power supply system according to any one of claims 1 to 5, wherein the determined navigation schedule is transmitted to the corresponding battery-electric propulsion ship. The management device sets the standby position of the offshore power generation vessel, the charging schedule of each of the plurality of battery electric propulsion vessels, and / or the navigation schedule of each of the plurality of battery electric propulsion vessels, and the plurality of battery electric propulsion vessels. The battery electric propulsion ship power supply system according to any one of claims 4 to 6, which is determined based on the operation data of the above and the machine learning result for the storage battery, the propeller drive motor, and the operating state data of the propeller. The battery electric propulsion ship power supply system according to any one of claims 1 to 3, further comprising at least one land power supply facility capable of charging the storage battery of the at least one battery electric propulsion ship. A management device capable of communicating with the at least one onshore power supply facility and the offshore power supply facility.
The management device acquires the electric power price data for each predetermined time in the land power supply facility, and based on the operation data and the electric power price data received from the at least one battery electric propulsion ship, the at least one battery electric propulsion. The battery-powered propulsion ship power supply system according to claim 8, wherein the battery power supply system according to claim 8 determines which of the offshore power supply equipment and the land power supply equipment should be prioritized to receive power. When the power price in the land power supply facility is lower than the power supply price in the offshore power supply facility, the management device gives priority to receiving power from the land power supply facility among the offshore power supply facility and the land power supply facility. A power supply command is generated, and the generated power supply command is transmitted to the at least one battery electric propulsion vessel.
When the power price in the land power supply facility is higher than the power supply price of the offshore power supply facility, a power supply command that gives priority to receiving power from the offshore power supply facility and the offshore power supply facility among the land power supply facilities. The battery electric propulsion ship power supply system according to claim 9, wherein the generated power supply command is transmitted to at least one battery electric propulsion ship. The offshore power supply facility is an offshore power generation vessel configured to be able to supply surplus electric power to the land power supply facility.
When the electric power price in the onshore power supply facility is higher than the power supply price in the offshore power supply facility, the management device has the at least one battery electricity based on the operation data received from the at least one battery electric propulsion ship. The standby position of the offshore power generation ship, which is optimal for supplying power to the propulsion ship, is determined, and the determined standby position is transmitted to the offshore power generation ship.
When the offshore power generation ship has surplus power after supplying power to the at least one battery electric propulsion ship, the management device issues a power selling command to sell the surplus power to the land power feeding facility. The battery-electric propulsion ship power supply system according to claim 9 or 10, which is transmitted to an offshore power generation ship. The at least one battery electric propulsion vessel includes a plurality of battery electric propulsion vessels.
The plurality of battery-powered propulsion vessels are configured to be able to supply surplus electric power to the onshore power supply facility.
When the electric power price in the onshore power supply facility is higher than the power supply price in the offshore power supply facility, the management device has a surplus for the battery electric propulsion ship having surplus power among the plurality of battery electric propulsion ships. The battery-electric propulsion ship power supply system according to claim 10, wherein a power sale command for selling power to the land power supply facility is transmitted. The at least one battery electric propulsion vessel includes a plurality of battery electric propulsion vessels.
The at least one offshore power supply facility includes a plurality of offshore power supply facilities.
It is equipped with a management device capable of communicating with the plurality of battery-powered propulsion vessels.
The management device acquires electric power price data for each predetermined time in the land power supply facility, and receives operational data and electric power price data from the plurality of battery electric propulsion vessels for each of the plurality of battery electric propulsion vessels. 8 to 12 of claims 8 to 12, which determine the charging timing and the charging schedule including the identification of the offshore power supply equipment or the land power supply equipment to be charged, and transmit the determined charging schedule to the corresponding battery electric propulsion vessel. The battery-electric propulsion ship power supply system according to any one item. The at least one battery electric propulsion vessel includes a plurality of battery electric propulsion vessels.
It is equipped with a management device capable of communicating with the plurality of battery-powered propulsion vessels.
The management device acquires electric power price data for each predetermined time in the onshore power supply facility, and based on the operation data and the electric power price data received from the plurality of battery electric propulsion vessels, the management device with respect to the plurality of battery electric propulsion vessels. Any one of claims 8 to 13 that makes a ship allocation plan, determines a navigation schedule including operations for each of the plurality of battery-electric propulsion vessels, and transmits the determined navigation schedule to the corresponding battery-electric propulsion vessels. Battery electric propulsion ship power supply system described in. The battery-electric propulsion ship power supply system according to any one of claims 8 to 14, wherein the at least one offshore power supply facility has a configuration capable of receiving power supply from the land power supply facility. The offshore power supply facility is an offshore power generator equipped with a generator.
Equipped with at least one onshore power supply facility and a management device capable of communicating with the offshore power generation vessel.
The management device acquires electric power price data for each predetermined time in the onshore power supply facility, and based on the operation data and the electric power price data received from the offshore power generation ship, the electric power generated by the offshore power generation ship is insufficient. The battery-electric propulsion ship power supply system according to claim 15, which determines whether to generate power from the offshore power generation ship or to receive power from the land power supply facility, if any. Battery An offshore power supply facility that charges the storage batteries of electric propulsion vessels.
With a generator
A storage battery that stores the electric power generated by the generator,
The power supply device connected to the storage battery and
Offshore power supply equipment equipped with. A tank for storing liquefied gas and
The offshore power supply facility according to claim 17, further comprising an internal combustion engine connected to the generator, which burns the liquefied gas or the vaporized gas thereof. It ’s a battery-powered propulsion ship.
A battery-powered propulsion vessel equipped with a communication device for transmitting operation data of the battery-electric propulsion vessel.

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