KR20230018916A - Device for Estimating the Remaining Operating Distance of a Small Electric Propulsion Vessel and Method Thereof - Google Patents

Abstract

The present invention relates to a remaining sailing distance estimation device for a small electric propulsion vessel and a method thereof, which take into consideration various marine environment conditions for small electric propulsion vessels. According to the present invention, the remaining sailing distance estimation device for a small electric propulsion vessel performs each step by a computer and comprises: a battery information calculation part (110) provided in the computer to acquire battery information including charging state in accordance with specifications and temperature of a battery installed in a small electric propulsion vessel; a motor information calculation part (120) provided in the computer to acquire information including specifications and current operation speed of a motor installed in the vessel; a horsepower estimation part (130) provided in the computer to acquire estimated requirement horsepower for the required speed of the vessel; and a remaining sailing distance estimation part (140) provided in the computer to estimate the remaining sailing distance for the required speed of the vessel.

Description

Device for Estimating the Remaining Operating Distance of a Small Electric Propulsion Vessel and Method Thereof

The present invention relates to an apparatus and method for estimating the remaining operating distance of a small electric propulsion ship, and more particularly, to an apparatus and method for estimating the remaining operating distance of a small electric propulsion ship in consideration of various maritime environmental conditions targeting a small electric propulsion ship. .

Various types of propellers are used as means for propelling various ships. For example, the screw may be rotated by power generated by a propulsion engine consuming petroleum resources, such as a diesel engine or a gasoline engine. And, the rotation of the screw at this time propels the ship. However, in the case of engines using fossil fuels, there is a problem in that the marine environment is polluted due to exhaust gases generated in the process of burning fossil fuels and oil residues and oil leaks generated from engines.

Due to the seriousness of environmental pollution, it is necessary to minimize pollutants caused by the use of fossil fuels. Therefore, recently, as the design considering the energy efficiency of ships has been applied as a part of maritime environmental regulations, research on the development of various electric propulsion systems for fishing boats and small ships has recently been conducted.

On the other hand, in the case of a ship, the operating environment is different from that of the land, and operating environments such as wind, wave height, and current can have a great impact on the possible operating distance and operating time. and monitoring of the power plant.

Although a vessel operation pattern analysis device (hereinafter referred to as 'prior art 1') is shown in Laid-Open Patent Publication No. 10-2018-0077538, it is not related to an electric propulsion vessel and measures the remaining operating distance of the vessel in real time. There is no technique for estimating.

Patent Registration No. 10-1154308 discloses a method for estimating the remaining mileage of an electric vehicle (hereinafter referred to as 'Prior Art 2'). Prior Art 2 shows a method for estimating the remaining mileage of an electric propulsion system, but this relates to an electric vehicle operating on land with a small driving environment, and not to an electric propulsion ship having a large operating environment.

In the case of ships, especially small electric propulsion ships, since they are greatly affected by wind, wave height, and current, it is essential to consider the dynamic characteristics of ships and operational environmental factors in order to advance the operation performance of small ships. .

Publication No. 10-2018-0077538 (published on July 9, 2018) Registered Patent Publication No. 10-1154308 (registered on June 1, 2012)

A technical problem to be achieved by the present invention is to provide an apparatus and method for estimating remaining sailing distance of a small electric propulsion vessel considering various marine environmental conditions.

The apparatus for estimating the remaining operating distance of a small electric propulsion vessel of the present invention for solving the above technical problem is provided in a computer to obtain battery information including the state of charge according to the specification and temperature of the battery installed in the small electric propulsion vessel Battery information calculator 110; A motor information calculation unit 120 provided in a computer to obtain information including specifications and current driving speed of a motor installed in the ship; a horsepower estimator 130 provided in the computer to obtain estimated required horsepower for the required speed of the ship; and a remaining navigation distance estimator 140 provided in the computer to estimate the remaining navigation distance for the required speed of the ship.

In addition, the remaining driving distance estimating unit 140 may include a battery remaining power amount derived from the battery information calculating unit 110; motor power amount derived from the motor information calculation unit 120; and the estimated required horsepower derived from the estimated required horsepower calculation unit 133; may be configured to calculate the estimated remaining driving distance.

In addition, the method for estimating the remaining operating distance of a small electric propulsion vessel of the present invention is a method for estimating the remaining operating distance of a small electric propulsion vessel in which each step is performed by a computer, comprising the steps of inputting a required speed for the vessel (S100); Calculating the remaining power amount of the battery of the ship (S200); Calculating the amount of motor power of the ship (S300); Calculating the estimated required horsepower of the vessel (S400); and estimating the remaining sailing distance of the ship using the remaining battery power amount, motor power amount, and estimated required horsepower information calculated in the above step (S500).

In addition, the step of calculating the estimated required horsepower (400) includes measuring the current speed of the ship (410); Calculating the transmitted horsepower of the vessel (420); and calculating (430) a marine environmental factor through modeling including at least one of wind, wave height, and current of the vessel.

As such, the apparatus and method for estimating the remaining sailing distance of a small electric propulsion ship according to the present invention can estimate the remaining sailing distance for the required ship speed, and thus, even when a certain amount of battery power remains, an efficient sailing scenario of the ship There are effects that can be derived.

In addition, the method for estimating the remaining sailing distance of a ship according to the present invention can derive the change in the estimated remaining sailing distance according to the change in the speed of the ship, so that the optimal ship speed with the maximum remaining sailing distance can be derived. It is also effective in deriving the estimated remaining driving distance for each driver by considering the driver's usual driving tendency, such as the ship's operating speed, etc.

In addition, the method for estimating the remaining sailing distance of a ship according to the present invention can be applied to electric propulsion ships of various sizes through comparison of empirical results using actual ship data and operating scenarios, so that a method for evaluating the performance of the electric propulsion system of the ship can be derived. There is an effect.

1 is a block diagram of an apparatus for estimating remaining sailing distance of a small electric propulsion vessel according to an embodiment of the present invention.
2 is a flowchart for estimating the remaining navigation distance of a ship according to an embodiment of the present invention.
Figure 3 is a flow chart of a method for estimating the remaining navigation distance of a small electric propulsion vessel according to the present invention.
4 is a detailed flowchart of step S400 shown in FIG. 3;
5 is a simulation test result of the estimated operational time and remaining operational distance according to the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and, therefore, is not limited to the embodiments described herein. In addition, terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

Hereinafter, a block diagram of an apparatus 100 for estimating the remaining sailing distance of a small electric propulsion vessel according to an embodiment of the present invention using FIG. 1, and FIG. 2 is for estimating the remaining sailing distance of a vessel according to an embodiment of the present invention It is a flow chart.

As shown in FIG. 1, the apparatus 100 for estimating the remaining operating distance of a small electric propulsion vessel according to the present invention includes a battery information calculation unit 110, a motor information calculation unit 120, and marine environmental conditions provided in a computer. It includes a calculating unit 130 and a remaining navigation distance estimating unit 140 .

First, the battery information calculation unit 110 obtains battery information of the ship.

A battery is one of the most important components for propelling a ship as an energy source for driving an electric propulsion ship. In order to estimate the remaining sailing distance of the ship, it is essential to calculate the state of charge and remaining power of the battery, and the battery information calculation unit 110 is basically configured to calculate the remaining power of the battery. Since the amount of power of the battery may vary depending on the specifications of the battery and the temperature of the battery, it is preferable that the battery information calculating unit 110 receives this information and uses it to more accurately calculate the amount of remaining power of the battery in consideration of this information. .

The motor information calculation unit 120 is a component for obtaining motor information of a corresponding ship.

In an electric propulsion ship, since the motor functions as an actuator using the energy source of the battery, in order to more accurately estimate the remaining sailing distance of the ship, the specifications of the motor (eg, motor power (kWh), maximum braking horsepower) , operating operating range, and transmitted horsepower) and current operating speed are required, and the motor information calculation unit 120 is configured to obtain this information.

At this time, even in the case of the motor, since performance may vary depending on temperature, load conditions, etc., the motor information calculation unit 120 may be configured to receive and consider this information.

And, the horsepower estimator 130 is a component that estimates the horsepower required for the required speed of the vessel.

The remaining operating distance of the ship to be estimated in the present invention may vary depending on the operating speed of the ship, the electric propulsion performance of the ship, the structural resistance characteristics of the ship, and the marine environmental conditions in which the ship is operating even when the remaining power of the battery in the corresponding ship is the same. there is. In particular, in the case of a small ship, since it can be greatly affected by marine environmental conditions, for example, wind, wave height, current speed, etc., in this horsepower estimation unit 130, the structural resistance characteristics of the ship It is configured to estimate the required horsepower considering the performance of the electric propulsion system and marine environmental conditions.

As shown in FIG. 2, the horsepower estimator 130 includes a required speed input unit of the ship, a transmission horsepower calculator 131 according to the resistance characteristics of the ship, a marine environment information factor calculator 132, and an estimated required horsepower A calculation unit 133 is included.

The requested speed input unit of the ship is a component for inputting the speed at which the ship wants to operate.

The estimated required horsepower for the required speed may be calculated by selecting and inputting the required speed of the vessel, or the estimated required horsepower for each speed may be calculated while sequentially changing the required speed of the vessel.

As shown in FIG. 2 , the delivered horsepower calculation unit 131 according to the resistance characteristics of the ship is a component that measures the current speed of the ship and calculates delivered horsepower (DHP) of the ship therefrom.

A method for calculating the delivered horsepower (DHP) of a ship according to the structural resistance characteristics of the ship is widely known, and from this, the delivered horsepower curve (DHP curve) of the ship according to the ship's resistance characteristics can be derived.

The calculated delivery horsepower (DHP) of the ship may include the structural resistance characteristics of the ship and the characteristics of the electric propulsion system of the ship, but considering the characteristics of the marine environment conditions, such as wind, wave height, and current Not doing it.

The marine environment condition is considered by the marine environment information factor calculation unit 132 .

The maritime environment information factor calculation unit 132 measures at least one of wind, wave height, and current, and derives a maritime environment information factor therefrom.

The maritime environment information factor calculation unit 132 may derive a maritime environment information factor from modeling of wind, wave height, current, and the like.

The estimated required horsepower calculation unit 133 calculates the estimated required horsepower considering the marine environment conditions by considering the calculated delivered horsepower (DHP) of the ship and the marine environment information factor together.

The remaining navigation distance estimator 140 is provided in a computer to perform modeling and calculation so as to estimate the remaining navigation distance for the required speed of the ship.

As shown in FIG. 2 , the remaining driving distance estimator 140 includes the remaining battery power amount information derived from the battery information calculator 110, the motor power amount information derived from the motor information calculator 120, and the It is a component provided in a computer to perform an operation for calculating an estimated remaining driving distance using the estimated required horsepower derived from the estimated required horsepower calculation unit 133 .

That is, when the required speed of the ship is input, the remaining operating distance estimator 140 calculates the estimated remaining operating distance of the ship using the estimated required horsepower in consideration of the remaining battery power amount, motor power amount, and marine environmental conditions. there is.

A method for estimating the remaining navigation distance of a small electric propulsion ship having such a configuration will be described in detail below.

As shown in FIG. 3, the method for estimating the remaining navigation distance of a small electric propulsion vessel according to the present invention, in which each step is performed by a computer, inputs a required speed for the vessel (S100); Calculating the remaining power amount of the battery of the ship (S200); Calculating the amount of motor power of the ship (S300); Calculating the estimated required horsepower of the ship (S400); and estimating the remaining sailing distance of the ship using the remaining battery power, motor power, and estimated required horsepower information calculated in the above step (S500).

The step of inputting the required speed for the ship (S100) is a step of inputting the speed at which the ship will operate.

There is a difference in the remaining sailing distance depending on the speed at which the ship is operating. Therefore, when estimating the remaining operating distance of a ship, it is necessary to first input the required speed, which is the speed of the ship to be operated, and this step corresponds to this.

Next, the step of calculating the remaining power of the battery of the ship (S200) is a step of determining the state of charge of the battery of the ship and deriving the remaining power of the battery therefrom.

This step is a step in which the battery information calculation unit 110 measures battery specification information, a state of charge of the battery, and temperature of the battery, and derives the remaining power amount of the battery therefrom.

Calculating the amount of power of the motor of the ship (S300) is a step of deriving the amount of power of the motor from specification information of the motor installed in the target ship. In this step, the motor information calculation unit 120 measures the specifications of the motor, the load of the motor, the temperature, etc., and a more accurate motor power amount can be derived therefrom.

The step of calculating the estimated required horsepower of the ship (S400) is a step of calculating the estimated required horsepower in consideration of the structural resistance characteristics of the ship, the performance of the electric propulsion system, and marine environmental conditions in the horsepower estimator 130.

The step of calculating the estimated required horsepower (400) includes measuring the current speed of the ship (410), calculating the horsepower of the ship (420), as shown in FIG. and calculating (430) a marine environment factor for considering marine environment conditions.

The step 410 of measuring the current speed of the ship is a step of measuring the current speed of the ship in order to calculate the structural resistance characteristics of the target ship and the horsepower of the ship based on the performance of the electric propulsion system provided in the target ship.

The step 420 of calculating the horsepower of the ship is a step of calculating the delivered horsepower (DHP) of the target ship using the current sailing speed of the target ship measured in the above step. The ship's horsepower calculated in this step is the horsepower of a normal ship, which does not include consideration of marine environmental conditions.

Next, calculating the marine environment factor (430) is a step of calculating the marine environment factor by considering the environment in which the target ship is operating in the sea and modeling it. Marine environmental conditions may include wind, wave height, current, etc., and a factor affecting the remaining sailing distance of the target vessel may be derived through modeling including at least one of these.

In step 400 of calculating the estimated required horsepower, the estimated required horsepower may be derived by considering the delivered horsepower (DHP) of the ship derived in step S420 and the maritime environment factor derived in step S430.

The step of estimating the remaining sailing distance of the ship (S500) is a step of calculating the estimated remaining sailing distance of the ship for the requested speed of the target ship.

In this step, the estimated remaining sailing distance of the ship is calculated at the required speed of the target ship using the remaining power of the battery calculated in step S200, the amount of motor power calculated in step S300, and the estimated required horsepower information calculated in step S400. do.

Using this method, not only can the estimated remaining sailing distance of a ship be calculated in real time, but also the change in the estimated remaining sailing distance of other ships in response to a change in the requested speed may be graphed as shown in FIG. 5 .

5 is a view showing the result obtained through simulation of the estimated navigable time and navigable distance, that is, the remaining navigable distance, with respect to the required speed of the ship.

5, in the case of operating under the influence of waves due to strong winds in the same direction as the ship, in the case of operating under the influence of waves due to weak winds in the same direction as the ship, and in bad weather conditions with a large influence of tides and winds The change result of the remaining voyage distance for the required speed of the ship is shown.

Looking at the graph shown in FIG. 5, it can be seen that the possible navigation time and remaining sailing distance according to the navigation scenario can be greatly influenced by the marine environmental conditions. Since high output is required for the operation, it can be seen that the time available for navigation and the remaining sailing distance can decrease when operating with the remaining amount of the limited battery, and that there is a specific ship speed at which the remaining sailing distance is maximized. can

As such, the apparatus and method for estimating the remaining operating distance of a small electric propulsion vessel according to the present invention has a causal relationship between the amount of energy (battery, motor) possessed by the target electric propulsion vessel and the variables constituting resistance performance and marine environmental conditions, etc. Based on this, it is possible to estimate the remaining operating distance in real time according to the operating scenario.

In addition, the apparatus and method for estimating the remaining sailing distance of a small electric propulsion ship according to the present invention can derive the change in the remaining sailing distance of the ship according to the change in the required speed of the ship, as shown in FIG. Through the proposed empirical results applied, it can be effectively used to derive performance evaluation methods for electric propulsion systems applicable to ships of various sizes.

In addition, since the change in the remaining sailing distance of the ship according to the requested speed of the ship can be expressed, there is an effect of deriving the estimated remaining sailing distance for each driver in consideration of the driver's usual driving tendency.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. will be. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the claims below.

100: Ship's real-time remaining navigation distance estimation device
110: battery information calculation unit 120: motor information calculation unit
130: horsepower estimation unit 131: transmission horsepower calculation unit
132: marine environment information factor calculation unit
133: estimated required horsepower calculator
140: Remaining operating distance estimation unit

Claims (5)

A battery information calculation unit 110 provided in a computer to obtain battery information including a state of charge according to specifications and temperatures of a battery installed in a small electric propulsion ship;
A motor information calculation unit 120 provided in a computer to obtain information including specifications and current driving speed of a motor installed in the ship;
a horsepower estimator 130 provided in the computer to obtain estimated required horsepower for the required speed of the ship; and
Remaining sailing distance estimation unit 140 provided in a computer to estimate the remaining sailing distance for the required speed of the vessel; Remaining sailing distance estimating device of a small electric propulsion vessel, characterized in that it comprises a.
According to claim 1,
The horsepower estimator 130,
a required speed input unit for the vessel;
Transmission horsepower calculation unit 131 according to the resistance characteristics of the vessel;
a marine environment information factor calculator 132; and
Remaining operating distance estimating apparatus for a small electric propulsion vessel, characterized in that it comprises an estimated required horsepower calculation unit (133).
According to claim 2,
The remaining navigation distance estimation unit 140,
the remaining battery power amount derived by the battery information calculation unit 110;
motor power amount derived from the motor information calculation unit 120; and
Estimated required horsepower derived from the estimated required horsepower calculation unit 133; Remaining operating distance estimating device for a small electric propulsion vessel, characterized in that configured to calculate the estimated remaining sailing distance by using.
In the method for estimating the remaining navigation distance of a small electric propulsion vessel performing each step in a computer,
Inputting a requested speed for the vessel (S100);
Calculating the remaining power amount of the battery of the ship (S200);
Calculating the amount of motor power of the ship (S300);
Calculating the estimated required horsepower of the vessel (S400);
Estimating the remaining operating distance of the ship using the remaining battery power amount, motor power amount and estimated required horsepower information calculated in the step (S500).
According to claim 4,
In step 400 of calculating the estimated required horsepower,
Measuring (410) the current speed of the vessel;
Calculating the transmitted horsepower of the vessel (420); and
Calculating (430) a maritime environmental factor through modeling including at least one of wind, wave height, and current of the vessel; A method for estimating remaining voyage distance of a small electric propulsion vessel, characterized in that it comprises a.

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