KR20220055592A - Ship - Google Patents

Abstract

Provided is a ship having a battery. The ship of the present invention comprises: a hull; a storage tank disposed on the hull to store a fuel; a pressure pump providing pressure for unloading the fuel stored in the storage tank; and an energy management system managing power used in the hull, wherein the energy management system includes: a power network disposed on the hull; a plurality of power generators connected to the power network to generate power and supply the same to the power network; an energy storage unit connected to the power network to store power or supply power to the power network; and an energy management unit controlling discharge of the energy storage unit and providing information on operation of the pressure pump when any one of the plurality of the generators malfunctions in unloading of the fuel stored in the storage tank.

Description

ship {Ship}

The present invention relates to a ship equipped with a battery.

An energy storage system (ESS) is a device that stores unconsumed surplus power among power generated by a generator and supplements insufficient power due to a load. In order to store surplus power and supplement insufficient power, the energy storage system may include an energy transmitting/receiving unit and an energy storing unit.

Depending on the usage of the load, the energy storage system can either store or release power.

Republic of Korea Patent Publication No. 10-1349874 (2014.01.10)

The problem to be solved by the present invention is to provide a ship equipped with a battery.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, one aspect of the ship of the present invention is a hull, a storage tank provided on the hull, for storing fuel, and a pressure for unloading the fuel stored in the storage tank. A pressure pump, and an energy management system for managing power used in the interior of the hull, wherein the energy management system includes a power grid provided in the hull and connected to the power grid, and produces power and supplies it to the power grid In the process of unloading a plurality of generators, an energy storage unit connected to the power grid to store power or supply power to the power grid, and fuel stored in the storage tank, a generator malfunctioning among the plurality of generators is generated In this case, it includes an energy management unit that controls the discharge of the energy storage unit and provides operation information of the pressure pump.

The operation information includes an estimated unloading time required to unload all the fuel stored in the storage tank with power by a generator that is operable among the plurality of generators based on the input target load amount of the pressure pump, and the input unloading and at least one of a pressure pump load applicable to unloading all of the fuel stored in the storage tank with electric power by a generator operable among the plurality of generators based on a target time.

When a malfunctioning generator among the plurality of generators occurs in the process of unloading the fuel stored in the storage tank, the energy management unit increases the discharge amount of the energy storage unit to a preset discharge amount, and the charge threshold of the energy storage unit expand the scope

The details of other embodiments are included in the detailed description and drawings.

1 is a view showing a ship according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating the energy management system shown in FIG. 1 .
FIG. 3 is a block diagram of the energy management unit shown in FIG. 2 .
4 and 5 are diagrams for explaining the operation of the energy storage unit.
6 to 8 are diagrams for explaining the operation of the information calculating unit.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments published below, but can be implemented in various different forms, and only these embodiments make the publication of the present invention complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

1 is a view showing a ship according to an embodiment of the present invention, FIG. 2 is a view showing the energy management system shown in FIG.

Referring to FIG. 1 , the ship 10 includes a hull 20 , a storage tank 30 , a main engine 40 , a pressure pump 50 , an unloading device 60 , an energy management system 70 , and a terminal device ( 80) is included.

The storage tank 30 may store fuel. The fuel stored in the storage tank 30 may be liquefied gas. For example, the fuel may be any one of LNG (Liquefied Natural Gas), LPG (Liquefied Petroleum Gas), DME (dimethyl ether), and ethane.

The main engine 40 may generate rotational force for propulsion. Due to the rotational force of the main engine 40 , the thruster may generate a thrust for propulsion of the vessel 10 . The main engine 40 may receive fuel stored in the storage tank 30 . For example, the main engine 40 may be a high-pressure injection engine such as a main engine electronic control gas injection (ME-GI) engine.

The pressure pump 50 may provide pressure for unloading the fuel stored in the storage tank 30 . The pressure pump 50 may be connected to the power grid 100 (see FIG. 2 ) of the energy management system 70 to be described later and operate with power generated by the generator 200 (see FIG. 2 ). The vessel 10 according to an embodiment of the present invention may be a vessel transporting liquefied gas. For example, the vessel 10 may be a shuttle tank. The fuel stored in the storage tank 30 may be transported to another vessel (not shown) or a storage tank on land (not shown) as cargo transported by the vessel 10 .

The fuel pressurized by the pressure pump 50 may be delivered to the unloading device 60 through the unloading pipe 55 . The unloading device 60 may transfer fuel to another adjacent vessel or to a storage tank on land. For example, the unloading device 60 may be a manifold.

The energy management system 70 may manage power used in the interior of the hull 20 .

Referring to FIG. 2 , the energy management system 70 includes a power grid 100 , a generator 200 , an onboard load 300 , an energy storage unit 400 , a power management unit 500 , and an energy management unit 600 . is composed The energy management system 70 may be installed in the ship 10 or an offshore structure to store and manage power.

The power grid 100 is provided in the hull 20 and is connected to various power facilities provided in the ship to perform power exchange between power facilities.

As shown in FIG. 2 , the power grid 100 may be an AC power grid. Accordingly, the power produced by the generator 200 is directly supplied to the power grid 100 , and the AC power of the power grid 100 is converted by a power converter 700 such as an AC/DC converter and a DC/AC inverter to power It can be distributed to equipment. However, the power grid 100 of the present invention is not limited to the AC power grid and may be a DC power grid. In this case, the power converter 700 may be appropriately disposed. Hereinafter, it will be mainly described that the power grid 100 is an AC power grid.

The generator 200 may generate electric power. For example, the generator 200 may be a diesel generator that produces large-capacity power of 2000 kW or more. A plurality of generators 200 may be connected in parallel to the power grid 100 to supply generated power to the power grid 100 .

The generator 200 may receive fuel stored in the storage tank 30 or a separate fuel tank (not shown). For example, the generator 200 may include a low-pressure injection engine such as a Dual Fuel Diesel Electric (DFDE) engine.

The onboard load 300 may operate using power supplied from the power grid 100 . For example, the inboard load 300 may be a thruster for generating propulsion, a crane, a temperature controller for controlling the temperature of a cargo tank, a compressor for compressing boil-off gas, or a re-liquefaction device for liquefying the compressed boil-off gas. Alternatively, fuel supply pumps, blowers, emergency control equipment, emergency lights, pumps for drainage facilities, GPS receivers, radar devices, radio facilities, ship location transmitters, etc. may be included in the onboard load 300 , and a power management unit to be described later 500 and the energy management unit 600 may be included in the onboard load 300 . In addition, the above-described pressure pump may be included in the ship load 300 .

The energy storage unit 400 may be connected to the power grid 100 to store power or to supply power to the power grid 100 . Specifically, the energy storage unit 400 may store the power generated by the generator 200 or may supply the stored power to the onboard load 300 through the power grid 100 .

The energy storage unit 400 may include a battery 410 and a converter 420 . The battery 410 may charge or discharge power, and the converter 420 may convert power of the battery 410 .

The battery 410 may charge or discharge DC power. The converter 420 converts the AC power received from the power grid 100 into DC power and delivers it to the battery 410 , or converts the DC power received from the battery 410 into AC power and supplies it to the power grid 100 . there is.

The energy storage unit 400 of the present invention may be an energy storage system (ESS), but is not limited thereto.

The power management unit 500 monitors the operating states of the onboard load 300 and the generator 200 connected to the power grid 100 , and serves to control the operation of the generator 200 . For example, the power management unit 500 may check the power consumption state of the onboard load 300 , and may cause the generator 200 to produce power or stop power generation according to the result.

A plurality of generators 200 may be connected to the power grid 100 . The power management unit 500 may cause only some generators to operate and the other generators to not operate. In addition, the power management unit 500 may control the load factor for each generator 200 . For example, the power management unit 500 may cause a specific generator to generate power at a load factor of 20%, and cause another generator to generate power at a load factor of 80%. Here, the load factor represents a ratio of the amount of power currently being produced among the maximum amount of power generated by the generator.

The power management unit 500 may refer to the power generation amount of other generators 200 in controlling the power generation amount of each generator 200 .

The energy management unit 600 controls the power management unit 500 and the energy storage unit 400 . For example, the energy management unit 600 may detect the power supply state of the power grid 100 , and may control the energy storage unit 400 according to the result.

In addition, the energy management unit 600 controls the discharge of the energy storage unit 400 when a malfunctioning generator among the plurality of generators 200 is generated in the process of unloading the fuel stored in the storage tank 30 , and the pressure pump (50) can provide operational information. When the fuel is unloaded, a relatively large amount of power may be consumed. For example, all generators 200 provided in the hull 20 may have to be operated in order to unload fuel. On the other hand, when some of the plurality of generators 200 cannot operate in the fuel unloading process, the unloading operation may not be performed correctly and a lot of time may be required.

The energy management unit 600 may provide the user with operation information of the pressure pump 50 related to unloading using an operable generator among the plurality of generators 200 .

The operation information may include at least one of a predicted unloading time and a load amount of the pressure pump 50 . The predicted unloading time represents a time required to unload all of the fuel stored in the storage tank 30 with power by an operable generator among the plurality of generators 200 based on the input target load amount of the pressure pump 50 . . When the user inputs a target load of the pressure pump 50 , the energy management unit 600 may predict and provide a time required for unloading to be completed based on the target load.

The pressure pump load is the load amount of the pressure pump 50 applicable to unloading all of the fuel stored in the storage tank 30 with power by a generator that is operable among the plurality of generators 200 based on the input unloading target time. indicates. When the user inputs a target time to complete the unloading, the energy management unit 600 may predict and provide the load amount of the pressure pump 50 required to complete the unloading within the target time.

The user may input the target load amount of the pressure pump 50 to receive the unloading prediction time or input the unloading target time to receive the pressure pump load amount to be used for the unloading operation of fuel.

In addition, when a malfunctioning generator among the plurality of generators 200 occurs in the process of unloading the fuel stored in the storage tank 30 , the energy management unit 600 sets the discharge amount of the energy storage unit 400 in a preset way. The total amount may be increased, and the charging threshold range of the energy storage unit 400 may be extended. A detailed description thereof will be described later with reference to FIGS. 4 and 5 .

Referring back to FIG. 1 , the terminal device 80 may communicate with the energy management unit 600 to receive a user command or output operation information of the pressure pump 50 received from the energy management unit 600 . The user may input the target load amount or the target unloading time of the pressure pump 50 using the terminal device 80 , and the pressure pump 50 received from the energy management unit 600 through the terminal device 80 is Operational information can be checked.

Hereinafter, the configuration and function of the energy management unit 600 will be described in detail with reference to FIGS. 3 to 8 .

3 is a block diagram of the energy management unit shown in FIG. 2 , FIGS. 4 and 5 are diagrams for explaining the operation of the energy storage unit, and FIGS. 6 to 8 are views for explaining the operation of the information calculating unit 620 . It is a drawing.

Referring to FIG. 3 , the energy management unit 600 includes a battery management unit 610 and an information calculation unit 620 .

The battery manager 610 serves to manage the amount of charging and discharging of the energy storage 400 . For example, the battery manager 610 may increase or decrease the amount of charging or discharging of the energy storage 400 . In addition, when a malfunctioning generator among the plurality of generators 200 occurs in the process of unloading the fuel stored in the storage tank 30 , the battery management unit 610 sets the discharge amount of the energy storage unit 400 in a preset room. can be increased in full.

Referring to FIG. 4 , when all of the generators 200 operate normally, the discharge amount of the energy storage unit 400 may be determined as DC1. Meanwhile, at time t1 when it is determined that some of the generators 200 malfunction, the battery manager 610 may increase the discharge amount of the energy storage unit 400 to DC2 so that emergency power is supplied to the power grid. Here, the size of DC2 may be determined according to the amount of power being consumed in the power grid. As power is replenished by the energy storage unit 400 , all or most of the onboard loads 300 connected to the power grid operate normally or a time for stable termination may be secured.

The increase in the amount of discharge of the energy storage unit 400 may proceed until time t2. t2 may be a time when the malfunction of the generator is terminated or a preset time. For example, when the repair of the malfunctioning generator is completed, the battery management unit 610 may reduce the discharge amount of the energy storage unit 400 to DC1. Alternatively, when a preset time has elapsed from the time t1 , the battery manager 610 may reduce the discharge amount of the energy storage unit 400 to DC1 .

In addition, when a malfunctioning generator among the plurality of generators 200 occurs in the process of unloading the fuel stored in the storage tank 30 , the battery management unit 610 may extend the charging threshold range of the energy storage unit 400 . there is.

Referring to FIG. 5 , the battery manager 610 may control the charging threshold range of the energy storage unit 400 .

The charging threshold range is an available range of the charging amount by the energy storage unit 400 , and may be defined by a lower limit threshold charging amount and an upper limit threshold charging amount. That is, the energy storage unit 400 cannot be discharged to have a charge amount lower than the lower limit threshold charge amount, and cannot be charged to have a charge amount higher than the upper limit threshold charge amount.

When all of the generators 200 operate normally, the battery manager 610 may set the lower threshold charge amount and the upper limit threshold charge amount of the energy storage unit 400 to TL1 and TH1, respectively. Accordingly, the energy storage unit 400 may perform charging and discharging within the ranges of TL1 and TH1. The values of TL1 and TH1 may be determined in relation to the lifespan of the battery 410 stored in the energy storage unit 400 . When the charge amount of the energy storage unit 400 is formed between TL1 and TH1, the battery 410 of the energy storage unit 400 can be used for a relatively long time without being damaged.

Meanwhile, when a malfunctioning generator occurs among the generators 200 , the battery management unit 610 may set the lower threshold charge amount and the upper limit threshold charge amount of the energy storage unit 400 to TL2 and TH2, respectively. The battery manager 610 decreases the lower limit threshold charge amount of the energy storage unit 400 and increases the upper limit threshold charge amount, thereby extending the charge threshold range. When the charging threshold range is extended, the energy storage unit 400 may discharge or charge a larger amount of power than usual. As the charging threshold range is extended, the amount of emergency power described above may increase. For example, the energy storage unit 400 may supply emergency power to the power grid by repeating the process of discharging up to TL2 and charging up to TH2.

The expansion of the charging threshold range of the energy storage unit 400 may proceed until time t2. t2 may be a time when the malfunction of the generator is terminated or a preset time. Since t2 has been described above, a detailed description thereof will be omitted.

Referring to FIG. 3 again, the information calculating unit 620 may calculate operation information. As shown in FIG. 6 , the information calculating unit 620 may calculate the predicted unloading time based on the target load amount of the pressure pump 50 . Also, the information calculating unit 620 may calculate a plurality of unloading prediction times based on a plurality of target loads as shown in FIG. 7 . The user may input a plurality of target loads, and the information calculating unit 620 may calculate an unloading prediction time at which unloading is expected to be completed based on each target load.

Also, the information calculating unit 620 may calculate the pressure pump load amount based on the target unloading time as shown in FIG. 7 . In addition, the information calculating unit 620 (not shown) may calculate a plurality of pressure pump loads based on a plurality of unloading target times.

The operation information calculated by the information calculating unit 620 may be transmitted to the terminal device 80, and the user may perform the unloading operation of fuel by controlling the pressure pump 50 with reference to the received operation information. there is.

Although embodiments of the present invention have been described with reference to the above and the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can practice the present invention in other specific forms without changing its technical spirit or essential features. You will understand that there is Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

10: ship 20: hull
30: storage tank 40: main engine
50: pressure pump 60: unloading device
70: energy management system 80: terminal device
100: power grid 200: generator
300: onboard load 400: energy storage unit
500: power management unit 600: energy management unit
610: battery management unit 620: information calculating unit
700: power converter

Claims (3)

hull;
a storage tank provided on the hull and storing fuel;
a pressure pump providing pressure for unloading fuel stored in the storage tank; and
Including an energy management system for managing the power used in the interior of the hull,
The energy management system,
a power grid provided in the hull;
a plurality of generators connected to the power grid, generating power and supplying it to the power grid;
an energy storage unit connected to the power grid to store power or supply power to the power grid; and
and an energy management unit that controls discharge of the energy storage unit and provides operation information of the pressure pump when a malfunctioning generator among the plurality of generators occurs in the process of unloading the fuel stored in the storage tank. According to claim 1,
The operation information is
an unloading prediction time required for unloading all of the fuel stored in the storage tank with electric power by an operable generator among the plurality of generators based on the input target load amount of the pressure pump; and
A vessel comprising at least one of a pressure pump load applicable to unloading all of the fuel stored in the storage tank with power by an operable generator among the plurality of generators based on the input unloading target time. According to claim 1,
When a malfunctioning generator among the plurality of generators occurs in the process of unloading the fuel stored in the storage tank, the energy management unit increases the discharge amount of the energy storage unit to a preset discharge amount, and the charge threshold of the energy storage unit A vessel that expands its range.

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