Apparatus and method for constructing an offshore plant

Abstract

The present invention relates to a system for constructing an offshore plant and a method thereof. More specifically, an apparatus according to one aspect of the present invention comprises: a communication module for acquiring offshore plant information; a memory storing at least one process related to the operation of constructing an offshore plant based on the offshore plant information; and a processor for performing an operation according to the process. The processor determines a generator arrangement based on the offshore plant information and a minimum separation distance between generators, determines a cable connection method for connecting a plurality of generators based on the generator arrangement, determines cable specifications and lengths for connecting the plurality of generators, an offshore substation, and an offshore hub, respectively, based on the generator arrangement, determines the capacity of a power storage system based on the offshore plant information, and evaluates the economic feasibility of the offshore plant using the generator arrangement, the cable connection method, the cable specifications, and the capacity of the power storage system. Other embodiments are also possible.

Description

Technology Field

[0001] The present disclosure relates to an apparatus and method for constructing an offshore plant. More specifically, it relates to an apparatus and method for optimizing generator placement, cable connections, and the capacity of a power storage system and evaluating economic feasibility based on offshore plant information. Background Technology

[0002] Offshore plants are critical facilities that generate electricity using natural energy, and as the demand for eco-friendly energy increases, their design and optimization are emerging as important challenges. However, existing technologies may have the following limitations in generator placement, cable connection methods, substation location selection, and power storage system design.

[0003] First, the utilization of natural energy may be reduced due to the inefficient placement of generators. Second, installation costs and power losses may increase if cable connection methods are not optimized. Third, efficiency may be reduced if economic feasibility is not sufficiently considered in the selection of transmission technology. Finally, there may be a problem where the capacity design of power storage systems fails to effectively compensate for the intermittency of natural energy.

[0004] To address these issues, there is an increasing need for technology that can comprehensively consider generator placement, cable connections, substation location selection, power storage system design, and economic evaluation during the offshore plant design process. Prior art literature

[0005] Patent Document: Korean Published Patent Application No. 10-2024-0018086 The problem to be solved

[0006] The purpose of the embodiments disclosed in this disclosure is to provide an apparatus and method that can increase power production efficiency and minimize cable installation costs and loss costs by optimizing the arrangement of generators and cable connection methods based on minimum separation distances between generators and offshore plant information.

[0007] In addition, the embodiments disclosed in this disclosure aim to provide an apparatus and method that enable the quantitative evaluation of economic feasibility during the offshore plant design phase by comprehensively considering installation costs and life cycle loss costs of generators, cables, offshore substations, power storage systems, etc.

[0008] In addition, the embodiments disclosed in this disclosure aim to provide an apparatus and method that can ensure the stability of power supply by accurately calculating the capacity of a power storage system that takes into account the variability of power production by utilizing weather data of the sea area where the offshore plant is located.

[0009] In addition, the embodiments disclosed in this disclosure aim to provide an apparatus and method that can increase installation efficiency and minimize wake effects or flow interference by automatically searching for the optimal location of an offshore substation using the distance between the offshore hub and the generator, candidate site parameters, and zone parameters.

[0010] The problems that this disclosure aims to solve are not limited to those mentioned above, and other unmentioned problems will be clearly understood by a person skilled in the art from the description below. means of solving the problem

[0011] An apparatus according to the present disclosure for achieving the aforementioned technical objectives comprises: a communication module for acquiring offshore plant information; a memory storing at least one process related to the operation of constructing an offshore plant based on the offshore plant information; and a processor for performing an operation according to the process, wherein the processor determines a generator arrangement based on the offshore plant information and a minimum separation distance between generators, determines a cable connection method for connecting a plurality of generators based on the generator arrangement, determines cable specifications and lengths for connecting the plurality of generators, an offshore substation, and an offshore hub respectively based on the generator arrangement, determines the capacity of a power storage system based on the offshore plant information, and evaluates the economic feasibility of the offshore plant using the generator arrangement, the cable connection method, the cable specifications, and the capacity of the power storage system.

[0012] In addition, the above-mentioned offshore plant information includes sea area information, weather information, offshore hub information, generator information, offshore substation information, cable information, and parameter information, and the parameter information may include neighbor parameters, zone parameters, and candidate parameters.

[0013] Additionally, the processor may determine an initial generator arrangement based on the offshore plant information and the minimum separation distance between generators, determine at least one additional mobile generator using a randomly selected generator and the neighbor parameter, and change the initial generator arrangement using the at least one additional mobile generator and the zone parameter.

[0014] In addition, the processor can calculate the annual power generation of the offshore plant based on the weather information and determine the capacity of the power storage system based on the annual power generation.

[0015] In addition, the processor can calculate the degree of suitability according to the following formula and evaluate the economic feasibility of the offshore plant based on the degree of suitability.

[0016] [ceremony]

[0017] Fit = Offshore Plant Life Expected × (Offshore Plant Annual Revenue - Annual Cable Loss Cost) - (Generator Installation Cost + Cable Installation Cost + Power Storage System Installation Cost)

[0018] In addition, the processor can identify a generator located at the shortest distance from the offshore hub and determine the location of the offshore substation using the identified generator, the zone parameter, and the candidate parameter.

[0019] In addition, the processor may set up a cable connection structure that connects the plurality of generators and the offshore substation, and if there are multiple cables that cross each other among the cable connection structure, maintain the connection of only one of the multiple cables that cross each other and remove the remaining cables, and adjust the cable connection structure based on the number of strings of the offshore substation.

[0020] In addition, the processor can disable the prevention of crossing of the plurality of cables when the cable connection structure is determined to be a radial connection method.

[0021] In addition, the processor can select the cable connecting the offshore substation and the offshore hub as HVDC (High Voltage Direct Current) or HVAC (High Voltage Alternative Current).

[0022] Additionally, a method for constructing an offshore plant, performed by a device comprising: a communication module for acquiring offshore plant information according to the present disclosure; a memory storing at least one process related to the operation of constructing an offshore plant based on the offshore plant information; and a processor for performing an operation according to the process, may include the steps of: the processor determining a generator arrangement based on the offshore plant information and a minimum separation distance between generators; the processor determining a cable connection method for connecting a plurality of generators based on the generator arrangement; the processor determining cable specifications for connecting the plurality of generators, an offshore substation, and an offshore hub, respectively, based on the offshore plant information; the processor designing a power storage system based on an annual power generation amount calculated based on the offshore plant information; and the processor evaluating the economic feasibility of the offshore plant using the generator arrangement, the cable connection method, the cable specifications, and the power storage system.

[0023] In addition to this, a computer program stored on a computer-readable recording medium for implementing the present disclosure may be further provided.

[0024] In addition to this, a computer-readable recording medium for recording a computer program for implementing the present disclosure may be further provided. Effects of the invention

[0025] According to the aforementioned means for solving the problem of the present disclosure, by optimizing the generator arrangement and cable connection method, the effect of simultaneously achieving power production efficiency and reducing installation costs is provided.

[0026] According to the aforementioned means for solving the problem of the present disclosure, the annual power generation of a plant is accurately calculated based on weather information and sea area information of the offshore plant, and the capacity of the power storage system is optimized through this data, thereby providing the effect of compensating for the problem of intermittent power production.

[0027] According to the aforementioned means for solving the problem of the present disclosure, by quantitatively analyzing revenue and costs over the life cycle of a plant through an economic evaluation that considers generator placement and cable connections, the effect of enhancing the economic feasibility of the project from the design stage is provided.

[0028] According to the aforementioned means for solving the problem of the present disclosure, the location of an offshore substation is automatically generated using candidate parameters and zone parameters, and an optimal candidate site is selected through grid search, thereby providing the effect of significantly improving the accuracy and efficiency of plant design.

[0029] The effects of the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by a person skilled in the art from the description below. Brief explanation of the drawing

[0030] FIG. 1 is an exemplary diagram showing a generator, cable, and offshore substation according to an example of the present invention. FIG. 2 is a block diagram briefly structuring an offshore plant construction device according to an example of the present invention. FIG. 3 is a flowchart illustrating a method for constructing an offshore plant according to an example of the present invention. Figure 4a is an example diagram showing cable connection methods. Figure 4b is an example diagram showing a cable connection method when passing through a detour point. FIG. 5 is a flowchart illustrating a method for determining an offshore plant layout structure according to an example of the present invention. FIG. 6 is an exemplary diagram showing an additional generator for changing the position according to an example of the present invention. FIG. 7 is an exemplary diagram illustrating a method for changing the location of an additional generator according to an example of the present invention. FIG. 8 is an exemplary diagram illustrating a method for determining the location of an offshore substation according to an example of the present invention. FIG. 9 is an exemplary diagram showing an offshore plant layout structure according to an example of the present invention. FIG. 10 is a flowchart illustrating a method for determining the capacity of a power storage system and evaluating the economic feasibility of an offshore plant according to an example of the present invention. Specific details for implementing the invention

[0031] Throughout this disclosure, the same reference numerals denote the same components. This disclosure does not describe all elements of the embodiments, and general content in the art to which this disclosure pertains or content that overlaps between embodiments is omitted. The terms 'part, module, component, block' as used in the specification may be implemented in software or hardware, and depending on the embodiments, a plurality of 'parts, modules, components, blocks' may be implemented as a single component, or a single 'part, module, component, block' may include a plurality of components.

[0032] Throughout the specification, when a part is described as being "connected" to another part, this includes not only cases where they are directly connected but also cases where they are indirectly connected, and indirect connections include connections made via a wireless communication network.

[0033] Furthermore, when it is stated that a part "includes" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0034] Throughout the specification, when it is stated that a component is located "on" another component, this includes not only cases where a component is in contact with another component, but also cases where another component exists between the two components.

[0035] The terms first, second, etc. are used to distinguish one component from another, and the components are not limited by the aforementioned terms.

[0036] Singular expressions include plural expressions unless there is an obvious exception in the context.

[0037] In each step, identification codes are used for convenience of explanation and do not describe the order of the steps; the steps may be performed differently from the specified order unless a specific order is clearly indicated in the context.

[0038] The operating principles and embodiments of the present disclosure will be described below with reference to the attached drawings.

[0039] In this specification, the term "device according to the present disclosure" includes all various devices capable of performing computational processing and providing results to a user. For example, the device according to the present disclosure may include all of a computer, a server device, an autonomous vehicle, and a portable terminal, or may take the form of any one of these.

[0040] Here, the computer may include, for example, a notebook, desktop, laptop, tablet PC, slate PC, etc. equipped with a web browser.

[0041] The above server device is a server that processes information by communicating with an external device, and may include an application server, a computing server, a database server, a file server, a game server, a mail server, a proxy server, and a web server.

[0042] The above portable terminal may include, for example, all types of handheld-based wireless communication devices such as PCS (Personal Communication System), GSM (Global System for Mobile communications), PDC (Personal Digital Cellular), PHS (Personal Handyphone System), PDA (Personal Digital Assistant), IMT (International Mobile Telecommunication)-2000, CDMA (Code Division Multiple Access)-2000, W-CDMA (W-Code Division Multiple Access), WiBro (Wireless Broadband Internet) terminals, smartphones, etc., as well as wearable devices such as watches, rings, bracelets, anklets, necklaces, glasses, contact lenses, or head-mounted devices (HMDs).

[0043] FIG. 1 is an exemplary diagram showing a generator, cable, and offshore substation according to an example of the present invention.

[0044] Referring to FIG. 1, generally, an offshore plant can supply power produced by the generator (1) by connecting the generator (1) to an offshore substation (2) via a first transmission cable (3), and the offshore substation (2) is connected to an onshore connection point via a second transmission cable (4). The generator (1) can perform the role of converting natural energy into electrical energy within the offshore plant. The generator (1) generates energy using natural resources such as wind power at sea and can generally produce power at a voltage of 1,000V to 2,000V.

[0045] The generated power can be transmitted to the offshore substation (2) via the first transmission cable (3). The first transmission cable (3) can be designed to connect the generator (1) and the offshore substation (2) to stably transmit power in a marine environment. The first transmission cable (3) may be referred to as an 'internal network cable,' which is used to collectively transmit power between the offshore substation and individual generators. The internal network cable must be designed considering the cable's current capacity, resistance, and durability against the external environment, and may require optimization work to minimize crossing between cables.

[0046] The offshore substation (2) can collect power received from the generator (1), transform it, and increase the voltage to 66kV to increase transmission efficiency. The offshore substation (2) collects power from multiple generators (1) and integrates it to enable stable transmission to a land-based connection point. The power processed at the offshore substation (2) can be organized into string units, which refers to a set of links connected from a specific incoming link to an outgoing generator. Power transmission in string units can serve as an important design element to minimize wake effects, flow interference, and power loss, and to facilitate maintenance.

[0047] The transformed power can be transmitted to a land connection point via a second transmission cable (4). The second transmission cable (4) can be referred to as an 'external network cable' and is designed to support high-voltage transmission. Through connection with the onshore power grid, power produced at sea can be supplied stably. The second transmission cable (4) connects the offshore substation (2) with a land connection point or an offshore hub and can generally perform transmission at a voltage of 345kV. To minimize power loss during long-distance transmission, the external network cable may select either an HVDC (High Voltage Direct Current) or HVAC (High Voltage Alternative Current) method. In particular, the HVDC method is advantageous for long-distance transmission of 60km or more and can provide high transmission efficiency and reduced power loss.

[0048] Additionally, the connection of cables connecting between generators (1) and between generators (1) and offshore substations (2) can be referred to as a ‘link’. A link defines the physical and electrical connection between a generator and an offshore substation, and each link can affect the efficiency and stability of the power flow. Furthermore, the distribution of generators connected to the incoming links of a specific string from the offshore substation (2) can serve as an important factor in determining the stability of the power collection and transmission system of the offshore plant.

[0049] The present invention can increase the power efficiency of an offshore plant through a process in which power generated from a generator (1) is transmitted to an offshore substation (2) via an internal network cable (3), and power that has been boosted and integrated at the offshore substation (2) is transmitted to a land connection point via an external network cable (4).

[0050] FIG. 2 is a block diagram briefly structuring and illustrating an offshore plant construction device according to an example of the present invention.

[0051] Referring to FIG. 2, the offshore plant construction device (100) according to the present disclosure is a device that performs various operations for constructing an offshore plant and may include a processor (110), memory (120), a communication module (130), and an external device (200). For example, the offshore plant construction device (100) can automate the design and economic evaluation of an offshore plant and provide an efficient generator placement and cable connection structure.

[0052] In one embodiment, the processor (110) can control and execute various operations for constructing an offshore plant. Specifically, the processor (110) can determine an optimal generator arrangement based on the minimum separation distance between generators. Additionally, based on the determined generator arrangement, it can generate a cable connection method to connect multiple generators and calculate the cable specifications and lengths to connect the generators, offshore substations, and offshore hubs, respectively. Furthermore, it can perform various calculations to evaluate the annual power generation of the offshore plant, the capacity of the power storage system, and economic feasibility.

[0053] In one embodiment, the processor (110) may be implemented as a memory that stores data for an algorithm or a program that reproduces the algorithm for controlling the operation of components within the device, and at least one processor (not shown) that performs the aforementioned operation using the data stored in the memory. In this case, the memory and the processor may each be implemented as separate chips. Alternatively, the memory and the processor may be implemented as a single chip.

[0054] In one embodiment, the memory (120) may store at least one process required for an operation performed by the processor (110). The memory (120) may include various algorithms, databases, and operation rules required for constructing an offshore plant and may support the processor (110)'s calculations and data processing in real time. For example, it may include generator placement algorithms, cable connection optimization algorithms, power storage system capacity calculation data, etc.

[0055] For example, the memory (120) can store data supporting various functions of the device and programs for the operation of the processor, and can store input / output data (e.g., music files, still images, videos, etc.), and can store a number of application programs (or applications) running on the device, data for the operation of the device, and instructions. At least some of these application programs can be downloaded from an external server via wireless communication.

[0056] Such memory (120) may include at least one type of storage medium among flash memory type, hard disk type, SSD type (Solid State Disk type), SSD type (Silicon Disk Drive type), multimedia card micro type, card type memory (e.g., SD or XD memory, etc.), RAM (random access memory; RAM), SRAM (static random access memory), ROM (read-only memory; ROM), EEPROM (electrically erasable programmable read-only memory), PROM (programmable read-only memory), magnetic memory, magnetic disk, and optical disk. Additionally, the memory (140) may be a database that is separated from the device but connected via wired or wireless connection.

[0057] In one embodiment, the communication module (130) serves to collect information related to the offshore plant through data communication with an external device (200). Specifically, the communication module (130) can obtain sea area information, weather information, offshore hub information, generator information, offshore substation information, cable information, and parameter information from the external device (200). This information can be used in the computation and decision process of the processor (110) for the construction of the offshore plant. The communication module (130) may include a function to transmit and receive real-time data through a wired or wireless network.

[0058] In one embodiment, the communication module (130) can transmit and receive data through wireless communication between the device (100) and an external device (200). Additionally, the communication module (120) can obtain weather information through an external server and can additionally obtain various data such as the location of its own vehicle or traffic conditions. The communication module (120) may include one or more components that enable communication with an external device, and may include, for example, at least one of a wireless communication module, a short-range communication module, and a location information module.

[0059] In one embodiment, the wireless communication module may include a wireless communication module that supports various wireless communication methods, such as GSM (global System for Mobile Communication), CDMA (Code Division Multiple Access), WCDMA (Wideband Code Division Multiple Access), UMTS (universal mobile telecommunications system), TDMA (Time Division Multiple Access), LTE (Long Term Evolution), 4G, 5G, and 6G, in addition to a Wi-Fi module and a WiBro (Wireless broadband) module.

[0060] The wireless communication module may include a wireless communication interface comprising an antenna and a receiver for receiving a signal from an external device (200). Additionally, the wireless communication module may further include a signal conversion module for demodulating an analog wireless signal received through the wireless communication interface into a digital control signal.

[0061] In one embodiment, the short-range communication module is for short-range communication and can support short-range communication by using at least one of Bluetooth™, RFID (Radio Frequency Identification), Infrared Data Association (IrDA), UWB (Ultra Wideband), ZigBee, NFC (Near Field Communication), Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus) technologies.

[0062] In one embodiment, the external device (200) is a device that provides information related to the construction of an offshore plant and may be a sensor network, a database server, or other offshore data management device. The external device (200) may provide weather data, topographical information of the sea area, generator specifications, installation restriction conditions, etc., to the offshore plant construction device (100).

[0063] The components illustrated in FIG. 2 are not essential for implementing the device (100) according to the present disclosure, so the device (100) described in this specification may have more or fewer components than the components listed above.

[0064] At least one component may be added or removed in response to the performance of the components shown in FIG. 2. Additionally, it will be readily understood by those skilled in the art that the relative positions of the components may be changed in response to the performance or structure of the system.

[0065] Meanwhile, each component illustrated in Figure 2 refers to a software and / or hardware component such as a Field Programmable Gate Array (FPGA) and an Application Specific Integrated Circuit (ASIC).

[0066] FIG. 3 is a flowchart illustrating a method for constructing an offshore plant according to an example of the present invention. FIG. 4a is an example diagram illustrating cable connection methods. FIG. 4b is an example diagram illustrating a cable connection method when passing through a bypass point.

[0067] Referring to FIG. 3, in one embodiment, in operation 31, the communication module (130) can obtain offshore plant information from an external device (200). The offshore plant information may include sea area information, weather information, offshore hub information, generator information, offshore substation information, cable information, and parameter information, and the parameter information may include neighbor parameters, zone parameters, and candidate parameters.

[0068] For example, offshore plant information can be specifically defined according to marine spatial planning. For instance, sea area information for an offshore plant includes the water depth, topographic characteristics, and geological conditions of the area, which can significantly influence the installation location of generators and the estimation of seabed construction costs. Meteorological information can be utilized to assess the availability and variability of natural resources such as wind, tidal, wave, and currents, and this data can be essential for optimizing the installation location and capacity of generators.

[0069] For example, information on onshore connection points or offshore hubs may be necessary to evaluate whether power generated by an offshore plant can be reliably transmitted to land or efficiently connected with other offshore facilities. Generator information may include the generator's performance curve, output voltage, installation and subsea construction costs, number of units installed, and power supply prices. This information can be used to analyze the economic feasibility and technical suitability of individual generators.

[0070] For example, offshore substation information may include the operating voltage of the substation, the number of connectable strings, and installation costs. The electrical specifications and physical layout decisions of the substation can significantly influence the power transmission efficiency and stability of the entire plant. Cable information may include the type of cable used, current capacity, resistance, impedance, unit price, and installation costs. This data can support optimal design to minimize power loss, reduce installation costs, and optimize the physical layout of the cables.

[0071] For example, parameter information includes data related to neighbors, zones, and candidates, and can be utilized to optimize generator placement and cable connection structures. For instance, neighbor parameters define the relationship between a specific generator and adjacent generators, while zone parameters can define the physical range required to locate generators or offshore substations. Candidate parameters can be used to evaluate potential installation sites during the site selection process.

[0072] Meanwhile, the load power (P) of the cable in a domestic AC three-phase line can be calculated using Equation 1 below.

[0073] [Equation 1]

[0074] P = √3 × V × I × cos θ

[0075] Here, V represents the operating voltage of the offshore substation, I represents the cable current value, and cos θ represents the load power factor.

[0076] For example, assuming that the operating voltage of the offshore substation is 66kV, the current value of the cable is 481A, and the load power factor (cos θ) is within an appropriate range, the load power of the cable can be calculated to be approximately 55MW. Therefore, this cable can accommodate a load equivalent to 5.5 generators with an output of approximately 10MW. Through these calculations, it is possible to appropriately set the capacity of the cable connected to the offshore substation and implement a design that can stably transmit power from each generator.

[0077] In one embodiment, in operation 32, the processor (110) can determine the generator placement, offshore substations, and offshore hubs. The generator placement is optimized by considering the minimum separation distance between each generator, and the offshore substations and offshore hubs can be positioned to maximize the power transmission efficiency of the plant. This determination process can be carried out based on the location of the plant within the sea area and the characteristics of wind or tidal resources.

[0078] In one embodiment, in operation 33, the processor (110) may determine a cable connection method for connecting multiple generators based on the generator arrangement. As illustrated in FIG. 4, the cable connection method may include a radial type (a), a composite type (b), and a circular type (c). The radial connection method may provide a simple structure by directly connecting each generator to an offshore substation, while the composite connection method may reduce cable length and increase economic efficiency by introducing a branching structure between generators. The circular connection method may enhance resilience in the event of a fault through the connection between generators. These methods may be selected considering the location of the generators, characteristics of the sea area, economic constraints, etc.

[0079] In one embodiment, in operation 34, the processor (110) can determine the cable specifications and lengths for connecting the plurality of generators, the offshore substation (20), and the offshore hub (30), respectively, based on the generator arrangement. The operation of determining the cable specifications and lengths can be performed considering the transmission efficiency of the system, installation costs, and the durability of the cable.

[0080] First, the processor (110) can set the presence of each link connecting the generator and the offshore substation as a decision variable. In this process, a link refers to a cable section that physically connects the generator and the offshore substation, and the setting of such links is essential for optimizing the power transmission path. During the search process, constraints to prevent the crossing of links may be set. For example, if the number of strings connected to the offshore substation is limited, a connection structure that prevents crossing can be searched to evenly distribute the load per string.

[0081] However, when applying a radial connection method, each generator has at most one input link, and the prevention of crossing between adjacent strings can be disabled during the link search process. This provides a simple and efficient connection method between the generator and the offshore substation due to the characteristics of the radial structure, and can be particularly useful in environments where installation costs are limited.

[0082] In addition, to avoid cable installation restricted areas, depth information of the target sea area or detour points in nearby sea areas may be considered.

[0083] For example, since the complexity and cost of installation work increase in areas with deep water, the processor (110) can search for an optimal path that bypasses these sections by weighting the link lengths. For example, by setting a high weight for the deep water sections, the installation cost can be minimized by automatically searching for a path that avoids those sections.

[0084] For example, referring to Fig. 4b, when avoiding island areas or land protrusions, a detour point in the nearby sea is pre-set considering construction conditions, and the cable length between the relevant generators or between the generator and the offshore substation is updated to the length passing through the detour point, which is longer than the existing straight-line connection length. For instance, if a detour point is used due to an avoidance factor between Generator 'A' and Generator 'B', the existing straight-line length If so, the length passing through the detour point It is changed to.

[0085] The process of determining cable specifications and length can be optimized using Mixed Integer Linear Programming (MILP) or Mixed Integer Non-Linear Programming (MINLP). The objective function of this process can be set to minimize cable installation costs, and the following constraints may be applied.

[0086] First, the load of the strings entering the offshore substation can be evenly distributed or set within a maximum / minimum range.

[0087] Second, the load of the sending link for each generator must be greater than or equal to the sum of the total load of the immediately preceding receiving link and the output of the corresponding generator.

[0088] Third, only one cable capable of accommodating the transmission load can be assigned to each individual link.

[0089] Fourth, every generator must be connected to at least one transmission link.

[0090] Fifth, the output link of a specific generator cannot be its own input connection (prevention of self-loop).

[0091] Sixth, offshore substations do not allow transmission connections other than transmission cables.

[0092] Seventh, the total load of individual links must not exceed the load capacity of the offshore substation.

[0093] In addition, when applying a composite cable connection method, the additional cost of cable division for individual generator connections may need to be considered. This method provides a flexible structure capable of efficiently aggregating power from multiple generators and transmitting it to an offshore substation. On the other hand, the radial connection method offers strengths in terms of simplicity and ease of maintenance, and can be effective in reducing installation and operating costs.

[0094] In one embodiment, the processor (110) can determine the method of an external network cable connecting the offshore substation (20) and the land linkage point (40) or the offshore hub (30).

[0095] External network cables can utilize HVAC (High Voltage Alternative Current) or HVDC (High Voltage Direct Current) transmission methods, and each method is selected according to the installation environment and requirements.

[0096] The HVAC method is suitable for transmission over relatively short distances and has low installation costs, but power loss may increase during long-distance transmission. On the other hand, the HVDC method is highly efficient for long-distance transmission of 60 km or more and is advantageous for high-capacity transmission due to low cable loss. However, when applying the HVDC method, a converter to convert power produced by a generator must be installed at an offshore substation (20), and an inverter to convert the transmitted DC power must be additionally installed at an onshore connection point (40) or an offshore hub (30). The installation cost of these conversion devices can be considered as part of the total installation cost of the external network cable.

[0097] In conclusion, in operation 34, the processor (110) can determine the optimal cable specifications and lengths for connecting multiple generators, offshore substations (20), and offshore hubs (30), respectively, based on the generator placement and system requirements.

[0098] Meanwhile, the processor (110) can set up a cable connection structure that connects the plurality of generators and the offshore substation, and if there are multiple cables that cross each other among the cable connection structure, it can maintain the connection of only one of the multiple cables that cross each other and remove the remaining cables, and adjust the cable connection structure based on the number of strings of the offshore substation.

[0099] First, the processor (110) can establish a cable connection structure based on the locations between each generator and the locations of the offshore substation and offshore hub. In this process, the specifications of the cables used can be determined by considering electrical characteristics such as current capacity, resistance, and impedance. For example, for connections between generators requiring high current capacity, cables with low resistance and high current capacity may be required, and these specifications can contribute to transmission efficiency and loss minimization.

[0100] When the processor (110) designs a cable path connecting a generator and an offshore substation, there may be multiple cables that cross each other among the cable connection structures. In this case, to reduce electrical interference and installation complexity that may occur due to the crossing, only one of the multiple cables may maintain the connection and the remaining cables may be removed.

[0101] Additionally, the processor (110) can adjust the cable connection structure connecting each generator to the offshore substation based on the number of strings of the offshore substation. The number of strings of the offshore substation represents the maximum number of cables that can be connected to the substation, and the cable connection can be optimized so as not to exceed this.

[0102] In particular, the processor (110) can disable the cross-prevention of the plurality of cables when determining the cable connection structure as a radial connection method. The radial connection method is a method of connecting such that each generator has a receiving link of at most one, and is a structure in which generators are continuously connected to each string. The reason the cross-prevention is disabled in the radial structure is that each connection is independent and there is little interference, and transmission efficiency can be maintained through a design that prevents physical collisions caused by crossing.

[0103] Finally, the processor (110) can optimize the cable length to reduce overall installation costs and minimize transmission losses. For example, the placement of the generator and the offshore substation can be optimized to reduce the cable length.

[0104] In one embodiment, in operation 35, the processor (110) can determine the capacity of the power storage system based on offshore plant information. The power storage system can compensate for the variability in power production that occurs depending on weather conditions and enable a stable power supply. To this end, a capacity calculation can be made considering the annual power generation and variability of the plant.

[0105] In one embodiment, in operation 36, the processor (110) can evaluate the economic feasibility of an offshore plant using the generator arrangement, the cable connection method, the cable specifications, and the capacity of the power storage system. The economic feasibility evaluation can be performed by calculating a suitability that takes into account the life cycle of the plant, including installation costs in the design phase, loss costs in the operation phase, and expected revenue.

[0106] FIG. 5 is a flowchart illustrating a method for determining an offshore plant layout structure according to an example of the present invention. FIG. 6 is an illustrative diagram illustrating an additional generator whose location is to be changed according to an example of the present invention. FIG. 7 is an illustrative diagram illustrating a method for changing the location of an additional generator according to an example of the present invention. FIG. 8 is an illustrative diagram illustrating a method for determining the location of an offshore substation according to an example of the present invention. FIG. 9 is an illustrative diagram illustrating an offshore plant layout structure according to an example of the present invention.

[0107] Referring to FIG. 5, in one embodiment, in operation 51, the processor (110) can determine the initial generator layout based on offshore plant information and the minimum separation distance between generators. Since generators utilize natural forces (wind power, tidal power, etc.) as energy sources, the overall output may be affected by the interaction of natural forces between generators. Therefore, optimal design conditions must be sought to efficiently manage installation costs while reducing mutual interference by maintaining a minimum separation distance between generators. Since the installation cost of the plant may increase if the separation distance is set excessively, an economic balance is important in the generator layout design.

[0108] In one embodiment, during the project financing phase for plant construction, the total output of the plant, expected production volume, and generator specifications are outlined, and a design capable of maximizing power production within a given sea area may be required. To achieve this, the distance between generators is configured to be as far apart as possible, which can increase productivity by optimizing the physical location of the generators and the characteristics of surrounding natural forces.

[0109] In one embodiment, various algorithms and mathematical modeling techniques may be utilized for the optimization of the generator placement. For example, Lloyd's algorithm can be used to derive the optimal placement through a uniform distribution among points, and force-based methods can adjust the placement based on the balance of forces between generators. Additionally, generator placements can be clustered using K-means clustering, and a placement that maximizes the distance between generators can be derived by utilizing the P-dispersion sum problem.

[0110] In one embodiment, the processor (110) can determine the initial generator placement based on offshore plant information, the minimum separation distance between generators, and an optimization algorithm. For example, in the initial placement, generators (10, 11, 12) are placed at different locations, and the design ensures that the minimum separation distance between generators is maintained. This placement determination is intended to secure optimal energy production efficiency while minimizing interference from natural forces such as wind or tides.

[0111] In one embodiment, in operation 52, the processor (110) can determine at least one additional movable generator using an arbitrarily selected generator and the neighbor parameters. Referring to FIG. 6, the processor (110) can determine the second generator (11) and the third generator (12), which are neighbor generators, as additional movable generators based on the generator (10) in the initial arrangement state. Here, the neighbor parameters may be defined to include distance, connection status, power generation efficiency, wind direction or ocean conditions, etc., thereby allowing the movable generators to be selectively determined. For example, when the generator (10) is the center, the second generator (11) connected to that generator and the closest third generator (12) may be additional movable targets.

[0112] Specifically, neighbor parameters are set as criteria for considering the interaction and optimal placement between generators. The processor (110) analyzes the relative distance between surrounding generators centered on the generator (10) and can select a generator connected to the front and rear (e.g., the second generator (11)) and additionally the closest generator (e.g., the third generator (12)). Neighbor parameters prioritize the physical connection status between generators so that connected generators can be prioritized as additional targets for movement. If the distance between generators is set to be within 300 meters, the closest generator within this distance can be selected. Additionally, if the neighbor parameters include multiple criteria (distance, connection status, output interference), weights can be assigned to evaluate the importance of each criterion and then determine the optimal additional generator to move.

[0113] In one embodiment, the zone parameter defines a specific radius for changing the position of the additional mobile generator, and the processor (110) can search for a movable position within this radius. If the zone parameter is set to 300 meters, the generator (10) can only change its position within a radius of 300 meters. The processor (110) can calculate new coordinates using Equation 2 with respect to the zone parameter, using an angle Ф and a distance range (0,300).

[0114] [Equation 2]

[0115]

[0116] Here, r can be set to a random value, and Ф is a randomly selected angle. When applying zone parameters, the position of additional mobile generators can be restricted to maintain a minimum separation distance from other generators (e.g., 5-10 times the blade length). This prevents interference between generators and minimizes output loss.

[0117] In one embodiment, since the output of an offshore wind turbine varies depending on the wind direction, speed, and intensity, the position of the turbine may be changed by considering the dominant wind direction when changing the turbine's position. For example, the position may be changed to place the turbine perpendicular to the wind to minimize wind interference. Zone parameters may be restricted based on the slope of the seabed topography, water depth, etc. When changing the position of the turbine, the water depth may be restricted so as not to exceed a specific range, or it may be set to move to an area with a gentle slope.

[0118] In one embodiment, the location of the additional mobile generator can be determined by considering cable length and cost efficiency. For example, the location of the generator (10) can be varied to minimize the length of the cable connecting it to the offshore substation (20) at the varied location.

[0119] In one embodiment, the processor (110) changes the position within a limited search range based on a specific random generator instead of changing the position for all generators. As a search algorithm, Lloyd's algorithm, force-based methods, K-means clustering, P-dispersion sum problem, etc., may be utilized. Through these algorithms, the processor (110) can reposition the position while maintaining the optimal distance between generators. Based on the search results, the optimal position can be repeatedly derived.

[0120] The processor (110) can efficiently select additional mobile generators and change their locations by comprehensively considering neighbor parameters and zone parameters. Through this process, interference between generators can be minimized, the power production efficiency of the plant can be maximized, and optimal generator placement can be achieved.

[0121] In one embodiment, in operation 53, the processor (110) can change the initial generator arrangement using at least one additional mobile generator and the zone parameter.

[0122] Referring to FIG. 7, various structural changes are possible to modify the location and connection relationship of additional mobile generators. For example, the existing connection (a → a') between the first generator (10) and the second generator (11) can be changed to a new connection (b → b') with the third generator (12). As another example, in the structures (a) and (b) shown at the bottom of FIG. 7, the method of connecting the generators is different. In (a), the second generator (11) and the third generator (12) are connected, while in (b), the connection between the first generator (10) and the second generator (11) is maintained, and a new path can be added.

[0123] During this process of changing the layout, the processor (110) can derive an optimal layout by considering the length, specifications, and electrical characteristics of the cable connected to the generator. The zone parameter can support efficient layout by limiting the range within which the additional mobile generator can move, thereby preventing unnecessary changes. For example, the movable range of the generator (10) can be limited to a specific radius according to the zone parameter, and it can be relocated to the most efficient position within that radius.

[0124] In one embodiment, in operation 54, the processor (110) can determine the optimal location of the offshore substation (20). Referring to FIG. 8, the processor (110) can select a top candidate location (22) among several candidate locations (21) existing within the offshore plant sea area (70) and derive the final location of the offshore substation (20) based thereon.

[0125] In one embodiment, the processor (110) can first identify the generator (10) located at the shortest distance from the offshore hub (30). In this process, geographical information of the offshore plant sea area (70), location information of the generator (10), and location information of the land connection point (40) can be received from an external device (200) via a communication module (130). Based on the received information, the processor (110) can calculate the distance between each generator and the offshore hub (30) or the land connection point (40), search for the closest generator, and generate an offshore substation candidate site (21) based on this.

[0126] In one embodiment, the creation of candidate sites (21) can be performed based on zone parameters and candidate parameters. The zone parameters define an area within a certain distance from the generator (10), and the candidate parameters may specify the number of candidate sites to be created within that area. For example, if the zone parameters are 10 km and the candidate parameters are 5, a total of 5 candidate sites can be automatically created within a 10 km radius around the generator (10). This process is considered an important step because the offshore substation is designed to optimize transmission efficiency between the generator and the offshore hub or onshore connection point.

[0127] In one embodiment, the processor (110) may perform an economic evaluation on the generated candidate sites (21) to select a top candidate site (22). The economic evaluation is performed by considering various factors including installation costs, maintenance costs, power loss, and suitability with the marine environment at each candidate site. For example, the installation cost per candidate site may vary depending on seabed ground conditions, water depth information, and cable installation costs. Maintenance costs may be determined by variables such as maritime accessibility and weather conditions depending on the candidate site. Power loss is a loss occurring in the amount of power transmitted from the candidate site to the offshore hub (30) or the land connection point (40), and may vary depending on the length and electrical characteristics of the cable.

[0128] In one embodiment, the processor (110) may derive a top candidate site (22), select a provisional optimal candidate site, and perform a grid search based thereon to determine the optimal location for an offshore substation. A grid search is a process of creating detailed candidate sites by dividing the area around the provisional optimal candidate site into intervals. An economic evaluation is performed again for each detailed candidate site, and this process can be adjusted according to the interval and number of repetitions set by the user. For example, if the interval is set to 500m, detailed candidate sites are created at 500m intervals around the provisional candidate site, and additional evaluations can be performed based thereon.

[0129] Finally, the processor (110) can determine the optimal location of the offshore substation (20) through this series of processes. The selected optimal location is the result of comprehensively considering the placement of generators, cable connection methods, and transmission efficiency with the offshore hub or onshore connection point. In particular, if the offshore substation is installed within the plant's sea area, the amount of renewable energy resources cut off due to the installation of the substation can also be included in the calculation. For example, if the operating area of ​​the generator is reduced due to the substation, the amount of such cut-off can be deducted from the plant's total revenue to evaluate the actual economic feasibility.

[0130] In summary, the processor (110) can derive the optimal location through multi-stage automated search and evaluation in the process of determining the location of the offshore substation (20).

[0131] In one embodiment, the processor (110) can determine the layout structure of the offshore plant in operation 55.

[0132] Referring to FIG. 9, the processor (110) can determine the overall layout of the offshore plant sea area (70), including the generator (10), the offshore substation (20), the offshore hub (30), and the onshore connection point (40). The processor (110) can determine the path and specifications of the first cable (50) connecting the generator (10) and the offshore substation (20). Additionally, the path and specifications of the second cable (60) connecting the offshore substation (20) and the offshore hub (30) can be determined.

[0133] At this time, the processor (110) can select the transmission method of the second cable (60) connecting the offshore substation (20) and the offshore hub (30) as HVDC (High Voltage Direct Current) or HVAC (High Voltage Alternating Current). The selection can be made by considering the transmission distance, power capacity, installation costs, power loss, etc. For example, if the transmission distance is 60 km or more, HVDC can be selected to minimize power loss.

[0134] In one embodiment, the processor (110) can analyze the characteristics of the offshore plant sea area (70) based on water depth information, weather information, cable information, etc. received from an external device (200) through a communication module (130). Through this, the cable installation path can be optimized and cable installation restricted areas can be avoided.

[0135] Additionally, the processor (110) can determine the cable connection method by considering the arrangement of the generator (10). Among connection methods such as radial, composite, and circular types, a method that can maximize the profit of the plant can be selected.

[0136] FIG. 10 is a flowchart illustrating a method for determining the capacity of a power storage system and evaluating the economic feasibility of an offshore plant according to an example of the present invention.

[0137] Referring to FIG. 10, in one embodiment, in operation 101, the processor (110) can calculate the annual power generation of the offshore plant based on weather information. The processor (110) can analyze natural force resources in the sea area, such as wind speed, tidal speed, solar intensity, etc., using weather data collected through an external device (200) or a communication module (130). This data may include weather station data, satellite data, or real-time sensor data, and the processor (110) can use this data to calculate the total annual amount of power that the generator (10) can produce in the sea area.

[0138] In one embodiment, weather information may consist of the strength, direction, duration, etc. of wind or current collected at specific time intervals, and the processor (110) may analyze the variability of power production based on this.

[0139] For example, in the case of a wind turbine, since power production may be reduced or stopped when the wind speed is below the generator's operating limit or exceeds the generation capacity, the processor (110) can predict the annual power production using weather data. For this purpose, Monte Carlo simulation or a weather pattern prediction algorithm may be used.

[0140] In one embodiment, in operation 102, the processor (110) can determine the capacity of the power storage system based on the annual power generation amount calculated in operation 101. Since the stability of the power supply in an offshore plant may be degraded due to the intermittency and variability of natural forces, a power storage system may be introduced as an essential measure to compensate for this. The processor (110) can analyze the variability of the annual power generation amount and calculate the capacity so that the power storage system can support a stable power supply through charging and discharging.

[0141] Specifically, the processor (110) can calculate the difference between the expected power supply and the actual power consumption of the generator based on annual power generation data. For example, if power consumption exceeds power generation during a specific period, the storage system can release power stored in advance to make up for the shortfall. Conversely, if power consumption is low and power generation is high, the storage system can store excess power. By simulating these scenarios, the processor (110) can calculate the minimum capacity, maximum capacity, and average capacity requirements of the storage system.

[0142] In one embodiment, the processor (110) may consider economic feasibility when determining the capacity of the storage system. Since the installation and operating costs of the storage system are proportional to the storage capacity, the processor (110) may perform a cost-effectiveness analysis to calculate a cost-effective capacity. For example, if the power storage capacity is too large, the initial installation and maintenance costs may increase excessively, and if the capacity is insufficient, it may be difficult to provide a stable power supply. The processor (110) may analyze various simulation results to find this balance point and derive the optimal storage capacity.

[0143] In one embodiment, additionally, the processor (110) can adjust the capacity calculation method according to the type and characteristics of the storage system. For example, the efficiency, discharge rate, and charging cycle of the storage system can be optimized by considering technical characteristics such as a lithium-ion battery, a flywheel energy storage device, or a compressed air storage system. Through this process, the storage system can effectively adjust the imbalance between power production and consumption in the offshore plant and ensure the stability of the power supply.

[0144] In one embodiment, in operation 103, the processor (110) can calculate the suitability of the offshore plant. The suitability is used as an indicator to evaluate the overall economic feasibility of the offshore plant, and in this embodiment, it can be calculated according to [Equation 3].

[0145] [Equation 3]

[0146] Fit = Offshore Plant Life Expected × (Offshore Plant Annual Revenue - Annual Cable Loss Cost) - (Generator Installation Cost + Cable Installation Cost + Power Storage System Installation Cost)

[0147] In one embodiment, the expected lifespan of the offshore plant refers to the entire period during which the plant is operated and can generally be set between 20 and 30 years. The annual expected revenue is the amount of electricity produced by the plant sold in the market, and can be calculated based on the process of electricity generated by the generator (10) being transmitted through the offshore substation (20), the offshore hub (30), and the onshore connection point (40). The annual expected revenue is calculated based on weather data and the performance curve of the generator and can be expressed as the product of the annual power generation and the electricity market price.

[0148] In one embodiment, the annual cable loss cost also includes power loss occurring during the process of transmitting power through the cable and additional costs to compensate for it. Cable loss can be calculated as in [Equation 4].

[0149] [Equation 4]

[0150] P_loss = 3 x I²x R x L

[0151] (P_loss: power loss, I: cable current, R: cable resistance, L: cable length)

[0152] Here, cable resistance R can be replaced with an impedance (Z) including reactance (X), which can be defined as Equation 5 below.

[0153] [Equation 5]

[0154] Z = R + jX

[0155] (X: reactance, R: resistance, θ: tan -¹ (X / R))

[0156] Power loss due to the variability of natural forces can be compensated for according to the output ratio. To this end, power loss can be calculated as in [Equation 6].

[0157] [Equation 6]

[0158] P_loss = 3 x (Pt / Pf)²x I²x R x L

[0159] (Pt: Actual load, Pf: Maximum load, (Pt / Pf)²: Loss load factor)

[0160] The loss load rate can be corrected using pre-calculated and stored data, which allows for the derivation of more accurate loss costs.

[0161] In one embodiment, the generator installation cost includes elements related to direct costs at the time of generator installation, and may also include environmental factors such as seabed ground construction. The cost of seabed ground construction may vary depending on the water depth information of the plant area and the seabed geological conditions, and higher costs may occur if the water is deep or the ground is hard. Accordingly, the generator installation cost is calculated including a correction value linked to the water depth.

[0162] In one embodiment, the cable installation cost includes the cable length, unit price, and additional costs required for installation. The cable installation route and cable specifications (e.g., wire type, current capacity, resistance) may also affect the total installation cost. The installation cost of a power storage system varies depending on the storage capacity and the type of storage system, and this cost can be calculated based on the unit price per unit of capacity. Additionally, the cable installation cost may include environmental factors such as seabed groundwork. The cost of seabed groundwork may vary depending on the water depth information of the plant area and the seabed geological conditions; higher costs may be incurred for cable installation in deep water or hard ground. Consequently, the cable installation cost is also calculated to include a correction value linked to water depth. As described above, the cost of seabed groundwork can be applied as a factor affecting both the generator installation cost and the cable installation cost.

[0163] In one embodiment, in operation 104, the processor (110) can evaluate the economic feasibility of an offshore plant based on the suitability calculated in operation 103. The economic feasibility evaluation can be performed by checking whether the suitability value is positive and whether it exceeds a specific threshold. If the suitability is positive, it indicates that the plant operation is profitable, and if the suitability exceeds the threshold, it means that the plant can provide high economic benefits relative to the investment. This economic feasibility evaluation can be used as a very important decision-making criterion in the plant design and operation process.

[0164] In one embodiment, to perform an economic evaluation more precisely and effectively, the processor (110) can perform various simulations and comparative analyses. For example, variables included in the suitability calculation, such as the installation cost of the generator, the installation cost of the cable, the installation cost of the power storage system, the expected plant revenue, and the annual power loss cost, can be analyzed under various scenarios. Through this, optimal economic feasibility can be secured by adjusting the placement of the generator, the cable connection method, the power storage system capacity, etc., during the plant design phase.

[0165] Meanwhile, in one embodiment, if the generator arrangement is changed according to operations 52 and 53 of FIG. 5, economic feasibility can be evaluated by reflecting such changes. When the neighbor parameter is set to 3, the processor (110) may calculate only the length change for the link of two generators connected before and after an arbitrarily selected generator, or ii) calculate only the link length change between the generators by including the closest generator in addition to the connected generator. This method can significantly reduce the amount of computation and increase search efficiency by locally limiting the search range instead of calculating the position change for all generators in the entire plant.

[0166] In one embodiment, the processor (110) may also search for new cable connections through local search. For example, a new cable path may be derived by changing the connection state between a randomly selected generator and a selected generator according to the neighbor parameters of that generator. In this process, the optimal connection configuration is derived by searching for as many non-crossing cases as there are cable connections. Non-crossing connections can contribute to maximizing transmission efficiency and minimizing cable installation and maintenance costs. Additionally, the most suitable connection configuration may be adopted by evaluating the economic feasibility of each connection state.

[0167] The processor (110) can calculate only the variation in suitability through this local search process and re-evaluate the economic feasibility of the entire plant based on this. For example, suitability can be recalculated according to a new cable connection configuration and compared with the existing configuration. If the suitability value is improved compared to the existing one, the new connection configuration can be adopted. Such steps can contribute to continuously optimizing the economic feasibility of plant operations.

[0168] Meanwhile, the disclosed embodiments may be implemented in the form of a recording medium that stores instructions executable by a computer. The instructions may be stored in the form of program code and, when executed by a processor, may generate a program module to perform the operation of the disclosed embodiments. The recording medium may be implemented as a computer-readable recording medium.

[0169] Computer-readable recording media include all types of recording media that store instructions that can be decoded by a computer. Examples include ROM (Read Only Memory), RAM (Random Access Memory), magnetic tape, magnetic disk, flash memory, optical data storage devices, etc.

[0170] As described above, the disclosed embodiments have been explained with reference to the attached drawings. Those skilled in the art will understand that the present disclosure may be practiced in forms different from the disclosed embodiments without changing the technical spirit or essential features of the present disclosure. The disclosed embodiments are illustrative and should not be interpreted restrictively. Explanation of the symbols

[0171] 100: Offshore plant construction device 110: Processor 120: Memory 130: Communication module 200: External device 10: Generator 20: Offshore substation 21: Candidate site 22: Top Candidates 30: Offshore Hub 40: Land connection point 50: 1st cable 60: The second cable 70: Offshore Plant Area

Claims

Claim 1 A communication module for acquiring offshore plant information; and a memory storing at least one process related to the operation of constructing an offshore plant based on the offshore plant information; The apparatus includes a processor that performs operations according to the above process, wherein the processor determines the arrangement of generators based on the offshore plant information and the minimum separation distance between generators, determines a cable connection method for connecting multiple generators based on the generator arrangement, and determines the cable specifications and lengths for connecting the multiple generators, an offshore substation, and an offshore hub, respectively, based on the generator arrangement, searches for a path to bypass a specific section based on the depth information of the target sea area of ​​the offshore plant or a pre-set bypass point, and determines the lengths considering the searched paths, determines the capacity of the power storage system based on the offshore plant information, evaluates the economic feasibility of the offshore plant using the generator arrangement, the cable connection method, the cable specifications, and the capacity of the power storage system, and evaluates the economic feasibility based on at least one of the generator installation cost, the cable installation cost, and the power storage system installation cost calculated by reflecting a depth correction value determined according to the depth information and seabed geological conditions, identifies the generator located at the shortest distance from the offshore hub, generates candidate sites for an offshore substation based on the identified generator, and performs an economic feasibility evaluation on the candidate sites to select the top candidate sites A device characterized by determining the location of the offshore substation by selecting a provisional optimal candidate site after selection, and performing a grid search to generate detailed candidate sites by dividing the area around the provisional optimal candidate site into intervals. Claim 2 A device according to claim 1, wherein the offshore plant information includes sea area information, weather information, offshore hub information, generator information, offshore substation information, cable information, and parameter information, and the parameter information includes neighbor parameters, zone parameters, and candidate parameters. Claim 3 The apparatus according to claim 2, wherein the processor determines an initial generator arrangement based on the offshore plant information and the minimum separation distance between generators, determines at least one additional mobile generator using an arbitrarily selected generator and the neighbor parameter, and changes the initial generator arrangement using the at least one additional mobile generator and the zone parameter. Claim 4 A device according to claim 2, wherein the processor calculates the annual power generation of an offshore plant based on the weather information and determines the capacity of the power storage system based on the annual power generation. Claim 5 In claim 2, the apparatus is characterized in that the processor calculates a suitability according to the following formula and evaluates the economic feasibility of the offshore plant based on the suitability. [Formula] Suitability = Expected lifespan of offshore plant × (Expected annual revenue of offshore plant - Annual loss cost of cable) - (Generator installation cost + Cable installation cost + Power storage system installation cost) Claim 6 In claim 2, the device is characterized in that the processor determines the location of an offshore substation using the identified generator, the zone parameters, and the candidate parameters. Claim 7 The device according to claim 2, wherein the processor sets a cable connection structure connecting the plurality of generators and the offshore substation, and if there are multiple cables crossing each other among the cable connection structure, maintains the connection of only one of the multiple cables crossing each other and removes the remaining cables, and adjusts the cable connection structure based on the number of strings of the offshore substation. Claim 8 A device according to claim 7, wherein the processor releases the prevention of crossing of the plurality of cables when the cable connection structure is determined to be a radial connection method. Claim 9 A device according to claim 2, characterized in that the processor selects the cable connecting the offshore substation and the offshore hub as HVDC (High Voltage Direct Current) or HVAC (High Voltage Alternative Current). Claim 10 A method for constructing an offshore plant, performed by a device comprising: a communication module for acquiring offshore plant information; a memory storing at least one process related to the operation of constructing an offshore plant based on the offshore plant information; and a processor for performing an operation according to the process, wherein the processor determines a generator arrangement based on the offshore plant information and a minimum separation distance between generators; the processor determines a cable connection method for connecting a plurality of generators based on the generator arrangement; the processor determines cable specifications for connecting the plurality of generators, an offshore substation, and an offshore hub, respectively, based on the offshore plant information; the processor designs a power storage system based on an annual power generation amount calculated based on the offshore plant information; and the processor evaluates the economic feasibility of the offshore plant using the generator arrangement, the cable connection method, the cable specifications, and the power storage system; wherein the step of determining the cable specifications includes a step of searching for a path that bypasses a specific section based on water depth information of the target sea area of ​​the offshore plant or a pre-set bypass point. The method comprises the step of determining the length by considering the path searched above; and the step of evaluating economic feasibility includes the step of evaluating economic feasibility based on at least one of the generator installation cost, cable installation cost, and power storage system installation cost calculated by reflecting a depth correction value determined according to the depth information and seabed geological conditions; and the method comprises the step of identifying a generator located at the shortest distance from the offshore hub; the step of generating offshore substation candidate sites based on the identified generator; the step of performing an economic feasibility evaluation on the candidate sites to select a top candidate site and then selecting a provisional optimal candidate site; and the step of determining the location of the offshore substation by performing a grid search to generate detailed candidate sites by dividing the area around the provisional optimal candidate site into regular intervals.A method characterized by further including

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