KR101571770B1 - System for generator control of reefer container ship - Google Patents

Abstract

A generator control system of a refrigeration container ship is disclosed. A generator control system of a refrigeration container ship according to an embodiment of the present invention includes: a plurality of generators for generating electric power through fuel consumption to supply electric power to be used in a ship; A loading and unloading unit for measuring the number of reefer containers loaded in the ship; A controller for predicting a power consumption amount according to the quantity of the refrigeration container and setting a flywheel generator that minimizes fuel consumption while meeting the predicted power consumption of the power generation amount; And a power manager for selectively starting at least one generator according to the flyer generator setting information received from the controller to distribute the generated power.

Description

TECHNICAL FIELD [0001] The present invention relates to a generator control system for a refrigeration container ship,

The present invention relates to a generator control system for a refrigeration container ship.

In recent years, various activities have been carried out to reduce energy consumption and fuel consumption of shipbuilders due to the decline in vessel freight rates due to the global economic recession and the intensification of green house gas (GHG) regulations.

Generally, ship generators are one of the important energy consuming sources used for power generation, and various activities are being carried out to improve the operation efficiency of generators. However, there is little development of control methods and algorithms due to fluctuation of power consumption.

Generators currently operating on ships are using generators and operating modes of various capacities, but in most practical electric load situations, in most cases, multiple or single generators operate in parallel with the same load It is in fact driving.

On the other hand, it is very important that refrigerated container ships are loaded with various sizes of reefer containers, so that the refrigeration container is supplied with power through sufficient power generation.

However, the number of refrigeration containers, which have the greatest effect on the power consumption in a refrigerator container ship, is not used in the generator operation method or algorithm configuration although it has a great influence on the power distribution in actual generator operation.

In particular, since the energy and fuel consumption are increased by selecting a large generator as a primary generator only for sufficient power supply without a specific reference in the operation of a plurality of generators having different generator capacities, There is an urgent need for a generator operation plan.

The embodiment of the present invention provides a generator control system of a refrigeration container ship that reduces the fuel consumption due to the operation of the generator through the selection algorithm and control of the fly-head generator considering the quantity of the refrigeration container most affecting the power consumption in the ship I want to.

According to an aspect of the present invention, a generator control system of a refrigeration container ship includes: a plurality of generators for generating electric power through fuel consumption to supply electric power to be used in a ship; A loading and unloading unit for measuring the number of reefer containers loaded in the ship; A controller for predicting a power consumption amount according to the quantity of the refrigeration container and setting a flywheel generator that minimizes fuel consumption while meeting the predicted power consumption of the power generation amount; And a power manager for selectively starting at least one generator according to the flyer generator setting information received from the controller to distribute the generated power.

Further, the generator control system of the refrigeration container ship may further include an electric power measuring unit for measuring a power consumption required for various ship power loads necessary for operation of the ship.

Also, the control unit predicts the total power consumption of the ship by summing the first power consumption amount according to the quantity of the refrigeration container and the second power consumption amount required for the ship power load, and estimates the total power consumption of the ship, Can be set.

Also, the control unit can predict the power consumption according to the quantity of the refrigeration container by referring to information modeling the power generation amount and the fuel consumption amount for the plurality of generators, the quantity of the refrigeration container and the power consumption amount in a linear relation.

Also, the control unit can find the optimum generator operation method using the predicted power consumption amount using the performance curves of the generators, and can transmit the flyer generator setting information to the power management unit.

Also, the refrigeration container may include: a refrigerator operated by an external power source; A blower for forcibly circulating the cooled air through the refrigerant; And a communication module for transmitting monitoring information of at least one of identification information (ID) of the refrigeration container, refrigerator container type, and operation state information to the loading and unloading monitoring unit.

The control unit stores a power consumption table according to the type of the refrigeration container and the operation state thereof. The control unit further applies the operation state according to the type of the individual refrigeration container and the temperature setting to the quantity of the refrigeration container, Can be predicted.

In addition, the power management unit may control the power generation amount of the generator to follow the total power consumption reflecting the variable load, which may vary depending on the operation state of the ship, to the required fixed load according to the quantity of the refrigeration container.

In addition, the power management unit may operate the parallel generator operation points at a time when the power load of the generator is 70% when the plurality of generators are operated in parallel.

According to the embodiment of the present invention, it is possible to reduce the amount of fuel consumption due to the operation of the generator through the selection algorithm and control of the fly-head generator taking into consideration the quantity of the refrigerator container that has the greatest influence on the power consumption in the ship.

In addition, the power consumption for the operation of the refrigeration container is set to a fixed value, and the fluctuation of the ship power load is checked every so often to control the planned power generation so as to follow the total power consumption of the ship in various electric load situations, The efficiency of operation of the generator can be improved.

1 is a block diagram schematically showing a configuration of a generator control system of a refrigeration container ship according to an embodiment of the present invention.
2 is a graph showing the relationship between the quantity of the refrigeration container and the average power consumption of the ship according to the embodiment of the present invention.
FIG. 3 is a graph showing a relationship between a generator power generation amount and a generator fuel consumption amount according to an embodiment of the present invention.
4 is a graph showing the relationship between the quantity of fuel in the freezing container and the fuel consumption amount according to the test according to the embodiment of the present invention.
5 is a flowchart schematically illustrating a method of controlling a generator of a refrigeration container ship according to an embodiment of the present invention.
6 is a flowchart schematically illustrating a method of controlling a generator of a refrigeration container ship according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the terms " part, "" module," and " module ", etc. in the specification mean a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software have.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A generator control system and method of a refrigeration container ship according to an embodiment of the present invention will now be described in detail with reference to the drawings.

1 is a block diagram schematically showing a configuration of a generator control system of a refrigeration container ship according to an embodiment of the present invention.

1, a generator control system 100 of a refrigeration container ship according to an embodiment of the present invention includes a plurality of generators 110, an unloading monitoring unit 120, an electric power measuring unit 130, a controller 140, And a power management unit 150.

The plurality of generators 110 generate power through fuel consumption to supply the power required for the refrigeration container and various ship power loads.

Each of the generators 110 may be constituted by generators of the same or different types and capacities, and either one may be operated alone or two or more generators may be operated in parallel depending on the required power consumption in the ship.

The loading and unloading monitoring unit 120 may be configured as a loading computer for managing the freight to be unloaded in the ship.

The unloading monitoring unit 120 measures the quantity of the reefer containers 10 to be shipped in the ship and monitors the types of the reefer containers and the operating states of the reefer containers and transmits them to the controller 140.

Here, the freezing container 10 includes a freezer 11 operated from an external power supply, and a blower 12 for forcedly circulating the air cooled through the refrigerant, They are stored frozen or refrigerated to transport foodstuffs or to transport electronic components sensitive to temperature changes.

Particularly, the refrigeration container 10 is provided with monitoring information such as identification information (ID) of the refrigeration container, type of refrigerating container (for example, standard / capacity) and operating condition 120 to the loading and unloading unit 120 so that the loading and unloading unit 120 can interlock with the loading and unloading unit 120.

The power measuring unit 130 measures a power consumption amount required for various ship power loads necessary for operation of the ship.

The power measuring unit 130 can measure the amount of power supplied to various power equipment in the ship through the switchboard or monitor the operation state of various power equipment in the ship to measure the power consumption in the ship.

The control unit 140 predicts the power consumption for the operation of the refrigeration container in consideration of the quantity of the refrigerator container 10 shipped to the ship identified through the cargo monitoring unit 120. And controls the overall operation of the generator control system 100 through an algorithm that selects a fly-head generator for efficient power generation and distribution that can minimize fuel consumption while meeting the expected power consumption.

At this time, the control unit 140 stores a table of power consumption according to various types of refrigerating containers and their operating states, and not only the quantity of the refrigerating containers 10 but also the types of individual refrigerating containers, It is possible to predict the power consumption.

That is, the controller 140 can estimate the exact amount of power consumption required for the maintenance of the refrigerating containers 10, taking into consideration the quantity of the refrigerated containers 10 shipped, as well as the individual type and individual operating conditions.

Meanwhile, the controller 140 can estimate the total power consumption of the ship by summing the second power consumption according to the ship's power load measured by the power measuring unit 130 to the first power consumption according to the number of refrigerator containers described above.

The control unit 140 may set the fly-head generator for efficient power generation and distribution according to the predicted total power consumption of the ship, and may transmit the fly-head generator to the power management unit 150.

2 and 3, a method for selecting the fly-head generator that minimizes the fuel consumption amount according to the quantity of the refrigeration container will be described in detail with reference to the flowchart of FIG.

FIG. 2 is a graph showing the relationship between the quantity of the refrigeration container and the average power consumption of the ship according to the embodiment of the present invention.

Referring to FIG. 2, the power consumption according to the quantity of the generator 110 is linearly proportional to the quantity of the refrigerator container 10, and can be obtained through a linear equation using a Least Square Method. have.

FIG. 3 is a graph showing a relationship between a generator power generation amount and a generator fuel consumption amount according to an embodiment of the present invention.

Referring to FIG. 3, the relationship between the power consumption and the fuel consumption of the generator 110 has a linear relationship in the generators 110 of various capacities, and the linear relationship is confirmed through various known papers.

The relationship between the power consumption and the number of refrigeration containers and the relationship between the generator power production amount and the fuel consumption amount can be expressed by Equation 1 below.

Here, the symbols used in Equation (1) are defined as follows.

- Pw_GE1: output of first generator (kW)

- Pw_GE2: output of the second generator (kW)

- GE1_Capa: 100 percent output of the first generator (kW)

- GE2_Capa: 100% output of second generator (kW)

- y:% of generator output during multiple generator operation (usually bring each generator load ratio constant)

- EL: power consumption = generator power output

- a1: Constant representing the relation between the power generation amount of the first generator and the fuel consumption amount (the correlation slope of the power generation amount and the fuel consumption amount)

- b1: Constant representing the relation between the power generation amount of the first generator and the fuel consumption amount (fuel consumption amount used in idling of the generator)

- a2: Constant representing the relation between the power generation amount of the second generator and the fuel consumption amount (the correlation slope of the power generation amount and the fuel consumption amount)

- b2: Constant representing the relation between the power generation amount of the second generator and the fuel consumption amount (fuel consumption amount used in idling of the generator)

- FOC: total fuel consumption of the first and second generators

- FOC_GE1: fuel consumption of the first generator

- FOC_GE2: fuel consumption of the second generator

- x: Frozen container quantity

- K1: Constant (slope) indicating the relationship between the quantity of the refrigerated container and the power consumption.

- K0: Constant indicating the relationship between the quantity of the refrigerated container and the power consumption (the ship's power consumption when the refrigerated container quantity is 0)

In Equation (1), the power generation amount and the fuel consumption amount for the first generator 110-1 and the second generator 110-2 having different capacities are expressed, and the quantity and the power consumption amount of the refrigeration container 10 are expressed by a linear relationship Modeling.

In this way, the controller 140 can obtain the relational expression of the linear refrigerant container and the power load through the cumulative data storage analysis of the refrigerant container quantity information, and calculate the optimum operation method of the generator according to the quantity of the refrigerator container through the linear relationship do.

For example, the control unit 140 may select one of the three methods shown in the following Equation (2) as an optimal operation method of the generator that minimizes the power consumption according to the quantity of the refrigerator container 10. [

1 shows a formula for calculating the fuel consumption FOC1 when the first generators GE1 and 110-1 are operated solely for the purpose of selecting the generator 110 that minimizes the fuel consumption amount.

2 shows the formula for calculating the fuel consumption FOC2 when the second generators GE2 and 110-2 are operated alone and the third shows the first generator 110-1 and the second generator 110-2 And the fuel consumption FOC3 when operating at the same time.

In Equation (2), multiplication of the maximum capacity of the generator by 0.7 is intended to operate the parallel operation point of the generator at the time when the power load of the generator is 70%.

The control unit 140 predicts the power consumption according to the quantity of the refrigerator container 10 and finds the optimum generator 110 operating method by using the predicted power consumption of each generator 110 using the performance curve, Information to the power management unit 150.

On the other hand, the power management unit 150 controls the selective startup and braking of at least one of the plurality of generators 110 according to the flyer generator setting information upon receiving the flyer generator setting information from the controller 140.

Also, the power management unit 150 may monitor the operation state of the generator 110 during operation to control the overall power generation amount of the generator so as to follow the total power consumption of the ship.

That is, the power management unit 150 controls the power of the generator 110 so as to follow the total power consumption reflected in the variable load, which may vary depending on the operation state of the ship, to the required fixed load according to the quantity, The production amount can be controlled.

In addition, when the power management unit 150 detects that a problem has occurred in any one of the generators in operation, it can stop the operation of the generator in which the problem occurs and operate the alternative generator to supply stable power in the ship.

4 and 5, a generator control method for a refrigeration container ship based on the configuration of the generator control system 100 according to the embodiment of the present invention described above will be described.

4 is a graph showing the relationship between the quantity of fuel in the freezing container and the fuel consumption amount through the test according to the embodiment of the present invention.

5 is a flowchart schematically illustrating a method of controlling a generator of a refrigeration container ship according to an embodiment of the present invention.

The method of controlling a generator of a freezer container ship according to an embodiment of the present invention includes a first generator 110-1 having a capacity of 1700 kW and a second generator 110-1 having a capacity of 2700 kW, Generator 110-2 in accordance with the present invention.

Referring to FIG. 5, the generator control system 100 according to the embodiment of the present invention measures the quantity of the refrigerated container shipped in the ship through the cargo monitoring unit 120 (S101).

The generator control system 100 predicts the amount of power consumed for operation of the refrigeration container through the quantity of the shipped refrigerator container 10 and the generator modeling (S102).

At this time, the generator control system 100 determines the quantity of the refrigerating containers 10, considering the number of the refrigerating containers 10 as well as individual types and individual operating states according to the refrigerating container monitoring information received from the unloading monitoring unit 120 The exact power consumption required for operation can be predicted.

Generator control system 100 refers to the performance curves of the respective generators based on the predicted power consumption, and selects at least one fly-head generator capable of minimizing fuel consumption while meeting the predicted power consumption of the power generation amount (S103 ).

Referring to FIG. 4, the generator control system 100 calculates the predicted power consumption when the number of the freezing containers 10 is 79 or less, by referring to the performance curves of the generators, -1) can be selected as an optimum capacity fly-head generator.

In this case, when the number of the freezing containers 10 is 79 or less, when the first generator 110-1 of 1700 kW is operated alone, the second generator 110-2 of 2700 kW is 4.9% Fuel efficiency has been confirmed to be effective.

Also, the generator control system 100 calculates the predicted power consumption when the number of the refrigerator containers 10 is equal to or greater than 80 and less than or equal to 256, by referring to the performance curves of the generators, and the second generator 110-2 of 2700 kW, Can be selected as a fly-head generator.

In this case, it was confirmed that the fuel efficiency of 4.8% was reduced compared with the case where the first generator 110-1 of 1700 Kw and the second generator 110-2 of 2700 kW were operated in parallel.

Then, the generator control system 100 generates electric power by starting the fly-top generator having the optimum capacity according to the quantity of the frozen container in the power management unit 150 based on the flyer generator selection information (S104).

Then, the generator control system 100 distributes the electric power generated by the flyer generator to operate the refrigeration container (S105).

4 and FIG. 5, two generators having different capacities are assumed, but the present invention is not limited thereto. In the case of a plurality of generators having different capacities (e.g., three 1700 kW and three 2700 kW), the same algorithm It is applicable. At this time, it is also possible to calculate which generator should be driven by the fly-head generator depending on the quantity of the frozen container.

This is effective in reducing the fuel consumption by 4% or more simply by changing the setting of the fly-head generator through the hardware interlock between the control unit 140 and the power management unit 150 in the generator control system 100. [

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications are possible.

For example, in the embodiment of the present invention shown in FIG. 5, the optimum amount of electric power consumption according to the number of refrigeration containers is predicted to select and start the optimum flywheel generators. However, the present invention is not limited to this, The fly-head generator can be selected and activated to further reflect the power consumption due to the variable load that can be varied in the situation.

6 is a flowchart schematically illustrating a method of controlling a generator of a refrigeration container ship according to another embodiment of the present invention.

Referring to FIG. 6, the generator control system 100 according to another embodiment of the present invention measures the quantity of the refrigerated container shipped in the ship (S201), and operates the refrigeration container in consideration of the quantity of the refrigerated container (S202). ≪ / RTI >

The generator control system 100 measures a second power consumption amount required for various ship power loads activated according to the operation of the ship through the power measuring unit 130 (S203).

At this time, the marine power load includes the fixed load which is always activated for the operation of the ship and the alternately activated variable load such as the engine auxiliary device, the skipper device, the cargo pump and the water treatment system, . ≪ / RTI >

The generator control system 100 predicts the total power consumption of the ship by summing the first power consumption according to the number of refrigeration containers and the second power consumption according to the ship's power load (S204).

The generator control system 100 selects at least one flywheel generator referring to the performance curves of the respective generators based on the predicted total power consumption of the ship (S205).

Then, the generator control system 100 generates electric power by starting the fly-head generator having the optimum capacity corresponding to the total power consumption of the ship based on the flyer generator selection information (S206).

Then, the generator control system 100 supplies the power generated by the fly-top generator to the refrigeration container and the ship power load (S207).

Then, when the total power consumption of the ship is compared with the total power consumption of the ship and the total power consumption of the ship exceeds the lower limit variation reference value or the upper limit variation reference value of the power generation amount (S208; YES), the generator control system 100 returns to step S203 Reset the flywheel generator by load.

For example, the generator control system 100 can reduce the amount of power produced by resetting the flywheel generator when the total power consumption is reduced by exceeding the lower limit variation reference value due to the inactivity of the in-vessel variable load.

On the other hand, the generator control system 100 can control the stable power supply by increasing the amount of electric power generated by the reset of the flywheel generator when the total power consumption is increased beyond the upper limit of the variation reference value by the additional operation of the in-vessel variable load.

As described above, according to the embodiment of the present invention, it is possible to reduce the fuel consumption amount due to the operation of the generator through the selection algorithm and control of the fly-head generator considering the quantity of the refrigerator container most affecting the power consumption in the ship have.

In addition, the power consumption for the operation of the refrigeration container is set to a fixed value, and the fluctuation of the ship power load is checked every so often to control the planned power generation so as to follow the total power consumption of the ship in various electric load situations, It is possible to improve the efficiency of operation of the generator according to the minimization of the power consumption.

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented through a program for realizing functions corresponding to the configuration of the embodiment of the present invention, a recording medium on which the program is recorded And such an embodiment can be easily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

100: generator control system 110: generator
120: unloading monitoring unit 130: power measuring unit
140: control unit 150:
10: Refrigerated container 11: Freezer
12: blower 13: communication module

Claims (9)

A plurality of generators for generating electric power through fuel consumption to supply power used in the ship;
A loading monitoring unit for measuring a quantity of the reefer containers loaded in the ship and collecting monitoring information of at least one of the individual refrigeration container identification information, type and operation state information by communication with the refrigeration container;
A controller for predicting a power consumption amount according to the quantity of the refrigeration container and monitoring information and setting a flywheel generator to minimize fuel consumption while meeting the predicted power consumption of the power generation amount; And
And a power manager for selectively generating at least one generator according to the flyer generator setting information received from the controller to distribute the generated power,
The control unit stores a table of power consumption according to individual types and individual operation states of the refrigeration containers, and applies the operation states according to the type of individual refrigeration containers and the temperature settings to the quantity of the refrigeration containers, Predicted refrigeration container ship generator control system. The method according to claim 1,
Further comprising an electric power measuring unit for measuring power consumption required for various ship power loads necessary for operation of the ship. 3. The method according to claim 1 or 2,
Wherein,
The first power consumption amount according to the quantity of the refrigeration container and the second power consumption amount required for the ship power load are summed to predict the total power consumption of the ship and the flyer generator is set to satisfy the total power consumption of the ship A refrigeration container ship generator control system. The method according to claim 1,
Wherein,
Wherein the power generation amount and the fuel consumption amount for the plurality of generators are formulated and the power consumption amount according to the quantity of the refrigeration container is predicted by referring to the information of the quantity of the refrigeration container and the power consumption amount modeled by the linear relation, system. The method according to claim 1,
Wherein,
And transmits the predicted power consumption amount to the power management unit by finding the optimal generator operation method using the performance curves of the respective generators and transmitting the flyer generator setting information to the power management unit. The method according to claim 1,
Wherein the freezing container comprises:
A refrigerator operated by an external power supply;
A blower for forcibly circulating the cooled air through the refrigerant; And
And a communication module for transmitting monitoring information of at least one of identification information (ID) of the refrigerator container, refrigerator container type, and operation state information to the loading and unloading monitoring unit. delete The method according to claim 1,
The power management unit includes:
Wherein the power generation amount of the generator is controlled so as to follow the total power consumption reflecting the variable load that can be varied according to the operation state of the ship, according to the required fixed load according to the quantity of the refrigeration container. 9. The method of claim 8,
The power management unit includes:
Wherein the generator parallel operation time point is operated when the power load of the generator is 70% when the plurality of generators are operated in parallel.

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