KR20190022983A - System and method of charging operation of ship - Google Patents

System and method of charging operation of ship Download PDF

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Publication number
KR20190022983A
KR20190022983A KR1020170107322A KR20170107322A KR20190022983A KR 20190022983 A KR20190022983 A KR 20190022983A KR 1020170107322 A KR1020170107322 A KR 1020170107322A KR 20170107322 A KR20170107322 A KR 20170107322A KR 20190022983 A KR20190022983 A KR 20190022983A
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KR
South Korea
Prior art keywords
battery
ship
power
generator
controller
Prior art date
Application number
KR1020170107322A
Other languages
Korean (ko)
Inventor
차대석
박병철
오승열
최정식
Original Assignee
전자부품연구원
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Priority to KR1020170107322A priority Critical patent/KR20190022983A/en
Publication of KR20190022983A publication Critical patent/KR20190022983A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00Type of vehicles
    • B60L2200/32Waterborne vessels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00Converter types
    • B60L2210/10DC to DC converters
    • B60L2210/12Buck converters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00Converter types
    • B60L2210/40DC to AC converters
    • B60L2210/46DC to AC converters with more than three phases
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/54Drive Train control parameters related to batteries
    • B60L2240/547Voltage
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/4433Floating structures carrying electric power plants
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries

Abstract

The present invention relates to a system and a method for charging operation of a ship for improving fuel consumption and reducing CO_2 emissions by minimizing drive of a generator which is built in the ship and supplies electric power to each load. The system for charging operation of the ship according to the present invention comprises: the generator provided in the ship to supply the electric power; a battery device which is charged by receiving the electric power from the generator, or discharges the electric power charged by the load; a three-phase electric power system provided on the ground, connected to the battery device when the ship is in an anchored state, and supplying the electric power to the battery device; and a controller determining the operation status of the ship through a voltage level applied to the battery device and controlling the electric power supply to the battery device through the three-phase electric power system when the ship is determined to be in the anchored state.

Description

Technical Field [0001] The present invention relates to a system and method for charging operation of a ship,

More particularly, the present invention relates to a system for minimizing the driving of a generator provided in a ship and supplying power to each load, thereby improving fuel economy and reducing the CO 2 emission. System and method.

The power source inside the ship is converted to AC power by the diesel generator, and the system voltage is developed to 750V through AFE (Active Front End). The grid voltage thus developed is connected to the internal load of the ship, the motor, and the energy storage system to supply the power. This system voltage can be controlled at variable speed because the constant voltage output is possible in the AFE even if the frequency changes.

In order to reduce the load fluctuation rate of the generator during the operation of the motor, the power supply in the ship is supplied within the predetermined charge state (SOC) in the energy storage system. Here, when the ship is operating, the motor drive is in a standby state, and the diesel generator charges the energy storage system.

However, since the ship battery device can be charged only through the generator, the fuel consumption rate is increased, fuel economy is lowered, and CO 2 emission amount is increased.

Korean Patent Publication No. 2013-0057750 (2013.06.03)

Accordingly, an object of the present invention is to provide a system and method for charging operation of a ship capable of reducing fuel consumption and reducing CO 2 emissions by supplying power from an external three-phase power system and initially charging a battery device when the ship is at anchor There is.

The present invention relates to a system for charging and operating a ship, comprising a generator for supplying electric power to a ship, a battery device for charging electric power supplied from the generator or discharging electric power charged to a load, A three-phase power system connected to the battery device for supplying electric power to the battery device, and a controller for determining the operation state of the ship through a voltage level applied to the battery device, and when the ship is determined to be in a docked state And a controller for controlling power supply to the battery device through the three-phase power system.

In the charging operation system of a ship according to the present invention, the battery device includes an SMPS for receiving power from the generator or the three-phase power system to drive the controller, a power source for supplying power supplied from the generator or the three- Or a bidirectional converter that applies the power of the battery to the load, a battery that charges and receives electric power from the generator or the three-phase power system through the bidirectional converter, or discharges the charged electric power to the load .

In the charging operation system of a ship according to the present invention, the bidirectional converter is characterized in that a plurality of half bridge converters having two switching elements connected in series are connected in parallel.

In the charging operation system of a ship according to the present invention, the battery device may further include a grid sensor for measuring a voltage level of a grid line supplied from the generator or the three-phase power system, and a battery sensor for measuring a charging state of the battery .

The controller determines that the ship is in an anchorage state when the voltage level measured from the grid sensor is less than a predetermined value and controls the bidirectional converter so that the three- And the battery is charged with electric power supplied from the system.

In the charging operation system of a ship according to the present invention, when the voltage level measured from the grid sensor is equal to or greater than a predetermined value, the controller determines that the ship is in operation and controls the bidirectional converter The battery is charged with electric power or the battery is discharged to supply electric power charged to the load.

The method for charging operation of a ship according to the present invention includes the steps of: checking a voltage level applied to the battery device by the controller; determining the operating state of the ship through the voltage level; State power system to supply power to the battery device via the three-phase power system.

The present invention relates to a charging and operating system for a ship, which, when a ship is determined to be in an anchored state, controls power supply to the battery device through a three-phase power system to initially charge the battery device, And CO 2 emissions can be reduced.

FIG. 1 is a block diagram showing a configuration of a charging operation system for a ship according to an embodiment of the present invention.
2 is a block diagram showing a configuration of a battery device according to an embodiment of the present invention.
3 is a deficiency diagram showing a configuration of a battery device according to an embodiment of the present invention.
4 is a graph illustrating a switching pattern of a bidirectional converter according to an embodiment of the present invention.
5 is a flowchart illustrating a method of charging and operating a ship according to an embodiment of the present invention.

In the following description, only parts necessary for understanding the embodiments of the present invention will be described, and the description of other parts will be omitted so as not to obscure the gist of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor is not limited to the meaning of the terms in order to describe his invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a configuration of a charging operation system for a ship according to an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of a battery device according to an embodiment of the present invention. FIG. FIG. 4 is a graph illustrating a switching pattern of a bidirectional converter according to an embodiment of the present invention. Referring to FIG.

1 to 4, a ship charging operation system 100 according to an embodiment of the present invention includes a generator 10, a battery device 20, a three-phase power system 30, and a controller 40 , And may further include a plurality of loads (50) driven by power supplied from the generator (10).

The generator 10 is provided inside the ship and includes a power generation section 11 and a power conversion section 12. [

The power generation section 11 produces a plurality of loads 50 placed in the vessel and AC power to be supplied to the battery device 20 and the controller 40. At this time, the power generation unit 11 may include a diesel generator capable of producing a large capacity electric power of 200 kW or more using petroleum chemical such as heavy oil (HFO) as fuel.

The power conversion section 12 converts the AC power produced by the power generation section 11 into DC power and supplies the converted DC power to the battery device 20, the plurality of loads 50, and the controller 40 via the grid line. As shown in FIG. For example, the power conversion section 12 can generate an AC voltage supplied from the power generation section 11 to 750V. Accordingly, since the constant-voltage output is possible even when the frequency is changed, the power conversion unit 12 can perform the variable speed control of the motor.

The battery device 20 can be charged with electric power from the generator 10 or can discharge electric power charged with the plurality of loads 50. [

The battery device 20 may include an SMPS 21, a grid sensor 22, a bidirectional converter 23, a battery sensor 24, and a battery 25.

The SMPS 21 can receive power from the generator 10 or the three-phase power system to drive the controller 40. [

The grid sensor 22 is capable of measuring the voltage level of the grid line supplied from the generator or generator 10 or the three phase power system 30 and is comprised of a grid voltage sensor 22a and a grid current sensor 22b . The grid sensor 22 can measure the voltage level at which the controller 40 determines the operation state of the ship.

The bidirectional converter 23 can apply the power supplied from the generator 10 or the three phase power system 30 to the battery 25 or apply the charged power of the battery 25 to the plurality of loads 50 have.

The bidirectional converter 23 may include a plurality of half bridge converters having two switching elements connected in series and connected in parallel. 3 and 4, the bidirectional converter 23 is a bi-directional converter structure using a half bridge. The bidirectional converter 23 has the upper switches SW 1U , SW 2U , SW 3U , and SW 4U turned off and the lower switches SW 1I , SW2I , SW3I , and SW4I , the upper switch operates as a diode and has the same form as the boost converter, so that the boosted voltage can be discharged so that the battery 25 is discharged. Conversely the lower switch (SW 1I, SW 2I, SW 3I, SW 4I) off, and the top switch (SW 1U, SW 2U, SW 3U, SW 4U) for when switching gangip possible by the generator 10 or the three-phase power The power supplied from the system 30 can be transmitted to the battery 25 to be charged. In this way, a plurality of half bridge converters are constituted in parallel, the currents flowing through the arms are distributed, and the currents flowing in the respective phases cancel each other by the phase difference, thereby reducing the input current ripple.

The battery sensor 24 measures the state of charge (SOC) of the battery 25 and may include a battery voltage sensor 24a and a capacitance current sensor 24b.

The battery 25 may be a variety of batteries that can be charged and discharged. For example, the battery 25 may be a nickel-cadmium battery, a lead acid battery, a nickel metal hydride battery (NiMH), a lithium ion battery, a lithium polymer battery, etc. But is not limited thereto. Such a battery can be supplied with electric power from the generator 10 or the three-phase power system 30 through the bidirectional converter 23 or can discharge the charged electric power to the plurality of loads 50.

The controller 40 determines the operation state of the ship through the voltage level applied to the battery device 20 and supplies power to the battery device 20 through the three phase power system when the ship is determined to be in an anchoring state . When the controller 40 receives power from the generator 10 or the three-phase power system 30 to the battery device 20, a voltage is generated on the grid line of the battery device 20, and the operation of the SMPS 21 Lt; / RTI >

The controller 40 confirms the voltage level measured from the grid sensor 22. Through this, the controller 40 judges the operating state of whether the ship is currently operating or in an anchored state. That is, when the voltage level measured from the grid sensor 22 is less than a predetermined value, the controller 40 determines that the ship is in an anchored state, and determines that the ship is in operation when the voltage level is greater than a predetermined value.

For example, when the voltage level measured from the grid sensor 22 is 750 V or more, the controller 40 can determine that the ship is in operation. When the voltage measured from the grid sensor 22 is less than 740 V and 500 V or more, . ≪ / RTI > At this time, the controller 40 can also confirm the value input from the three-phase power system 30. [

The controller (40) checks the state of charge of the battery (25) through the battery sensor (24) when the ship is in an anchored state. Here, the controller 40 can charge the battery 25 with electric power supplied from the three-phase power system 30 when the state of charge of the battery 25 is less than a predetermined value. That is, the controller 40 can charge the battery 25 so that the charged amount of the battery 25 is 90% or more.

The controller 40 checks the state of charge of the battery 25 through the battery sensor 24 when the ship is in operation. Here, the controller 40 can charge the battery 25 with the electric power supplied from the generator 10 when the state of charge of the battery 25 is less than a predetermined value. That is, the controller 40 can charge the battery 25 so that the charged amount of the battery 25 is 90% or more. Here, the controller 40 can control to discharge the battery 25 and supply it to the plurality of loads 50 when the charged amount of the battery is less than 90%.

On the other hand, the plurality of loads 50 may be provided in the ship and may have various configurations for performing various functions using electric power. For example, the plurality of loads 50 may be illumination inside the ship, a motor for driving the ship, and the like.

Thus, when the ship is determined to be in an anchoring state, the charging operation system 100 of the ship according to the embodiment of the present invention controls the power supply to the battery device 20 through the three-phase power system 30, By initially charging the apparatus 20, the driving of the generator 10 can be minimized to improve the fuel economy and reduce the CO 2 emission amount.

Hereinafter, a charging operation method of a ship according to an embodiment of the present invention will be described.

5 is a flowchart illustrating a method of charging and operating a ship according to an embodiment of the present invention.

Referring to FIG. 5, in step S10, the controller checks a voltage level applied to the battery device.

Next, the controller determines the operation state of the ship in step S20, and controls the power supply to the battery device through the three-phase power system when the ship is determined to be in an anchored state (S21).

That is, in step S20, the controller confirms the voltage level measured from the grid sensor (S10) and determines the operating state of whether the ship is currently operating or in an anchored state. That is, if the voltage level measured from the grid sensor is less than a predetermined value, the controller determines that the ship is in an anchor state, and determines that the ship is in operation when the voltage level is greater than a predetermined value.

For example, the controller can determine that the vessel is in operation when the voltage level measured from the grid sensor is 750V or more, and can determine that the vessel is in an anchorage state when the voltage measured from the grid sensor is less than 740V and 500V or more. At this time, the controller can also check the value input from the 3-phase power system.

Next, in step S21, the controller checks the state of charge of the battery through the battery sensor (S30) when the ship is in an anchored state.

In step S31, the controller can charge the battery (S40) with the power supplied from the three-phase power system when the state of charge of the battery is less than a predetermined value. In other words, the controller can charge the battery so that the charge of the battery is 90% or more.

On the other hand, in step S21, when the ship is in a running state, the controller checks the state of charge of the battery through the battery sensor (S50).

In step S51, the controller can charge the battery (S60) with the electric power supplied from the generator when the state of charge of the battery is less than a predetermined value. That is, the controller can charge the battery 25 so that the charged amount of the battery is 90% or more. In step S51, if the battery charge amount is less than 90%, the controller can control to discharge the battery and supply it to a plurality of loads (S70).

It should be noted that the embodiments disclosed in the drawings are merely examples of specific examples for the purpose of understanding, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10: Generator 11: Power generator
12: power conversion unit 20: battery device
21: SMPS 22: Grid sensor
23: Bi-directional converter 24: Battery sensor
25: Battery 30: Three phase power system
40: controller 50: load
100: Ship's charging operation system

Claims (7)

  1. A generator installed in the ship to supply electric power;
    A battery device for receiving and charging electric power from the generator or for discharging electric power charged to a load;
    A three-phase power system provided on the ground and connected to the battery device when the ship is in an anchored state to supply power to the battery device;
    A controller for determining an operation state of the ship through a voltage level applied to the battery device and controlling power supply to the battery device through the three-phase power system when the ship is determined to be in an anchored state;
    And a control unit for controlling the operation of the ship.
  2. The method according to claim 1,
    The battery device includes:
    An SMPS that receives power from the generator or the three-phase power system and drives the controller;
    A bi-directional converter that applies power supplied from the generator or the three-phase power system to a battery, or applies power of the battery to the load;
    The battery charging the battery or receiving power from the generator or the three-phase power system through the bidirectional converter, or discharging the charged power to the load;
    And a control unit for controlling the operation of the ship.
  3. 3. The method of claim 2,
    The bidirectional converter includes:
    Wherein a plurality of half bridge converters having two switching elements connected in series are connected in parallel.
  4. 3. The method of claim 2,
    The battery device includes:
    A grid sensor for measuring a voltage level of a grid line supplied from the generator or the three-phase power system;
    A battery sensor for measuring a state of charge of the battery;
    Further comprising: a control unit for controlling the operation of the ship.
  5. 5. The method of claim 4,
    The controller determines that the ship is in a berthing state when the voltage level measured from the grid sensor is less than a predetermined value and controls the bidirectional converter to charge the battery with power supplied from the three- Charging operation system of the ship which features.
  6. 6. The method of claim 5,
    Wherein the controller determines that the ship is in operation when the voltage level measured from the grid sensor is greater than a predetermined value and controls the bidirectional converter to charge the battery with power supplied from the generator, And supplies the electric power charged in the load to the ship.
  7. Checking a voltage level applied by the controller to the battery device;
    The controller determining the operating state of the ship through the voltage level;
    Controlling the controller to supply power to the battery device through the three-phase power system when the ship is determined to be in an anchored state;
    Wherein the vessel is a ship.
KR1020170107322A 2017-08-24 2017-08-24 System and method of charging operation of ship KR20190022983A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130057750A (en) 2011-11-24 2013-06-03 한국해양대학교 산학협력단 Energy management system and method for ship

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130057750A (en) 2011-11-24 2013-06-03 한국해양대학교 산학협력단 Energy management system and method for ship

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