Calculation method, equipment and product for exploitable tidal energy based on installed capacity density

Abstract

The present application discloses a method, device and product for calculating the exploitable amount of tidal energy based on installed capacity density, which relates to the field of tidal energy development. First, the terrain feature data and measured tidal data of the calculation area are obtained and a tidal numerical model is established; numerical simulation is performed based on the tidal numerical model to obtain the tidal flow velocity data of each grid unit in the calculation area, and the average power density of tidal energy and the installed capacity density of tidal energy of each grid unit are calculated accordingly; based on the average power density of tidal energy and the water depth and terrain conditions of each grid unit, a first calculation area is screened out from the calculation area; based on the environmental engineering conditions required for tidal energy development, a second calculation area is screened out from the first calculation area; and according to the tidal energy installed capacity density of each grid unit in the first / second calculation area, the theoretical exploitable amount and the actual exploitable amount of tidal energy are calculated, respectively, thereby improving the accuracy of the calculation of the exploitable amount of tidal energy and expanding the scope of application of the calculation method.

Description

Technical Field

[0001] The present application relates to the technical field of tidal energy development, and in particular to a method, device and product for calculating the exploitable amount of tidal energy based on installed capacity density. Background Art

[0002] In the current context of tidal energy development, calculating the exploitable amount of tidal energy and identifying its resource reserves are fundamental to tidal energy development planning and project layout, and are a prerequisite for achieving large-scale development and utilization of tidal energy. Therefore, studying methods for calculating the exploitable amount of tidal energy resources is an important foundational work to support the large-scale utilization of tidal energy.

[0003] Currently, methods for estimating the exploitable amount of tidal energy can be generally divided into two categories: those based on energy flux (the Farm method and the Flux method) and those based on dynamic analysis (the Garrett method). The Flux and Garrett methods are based on a vertical cross-section of a tidal channel, using the tidal channel as the calculation unit. Consequently, the spatial scope of resource assessment is limited and turbine characteristics are not considered. While the Farm method considers representative turbine models, it does not account for the compatibility of turbine characteristics with water depth and topography, and the exploitable amounts obtained using models with different technical parameters vary significantly. Therefore, existing tidal energy exploitable amount estimation methods generally suffer from limited scope of application and inaccurate calculations of exploitable tidal energy due to factors such as the limited spatial scope of resource assessment or incomplete consideration of assessment factors. Summary of the Invention

[0004] The purpose of this application is to provide a method, device and product for calculating the exploitable amount of tidal energy based on installed capacity density, so as to improve the accuracy of the calculation of the exploitable amount of tidal energy and expand the scope of application of the calculation method.

[0005] To achieve the above objectives, this application provides the following solutions.

[0006] In a first aspect, the present application provides a method for calculating the exploitable amount of tidal energy based on installed capacity density, including:

[0007] Obtaining terrain feature data and measured tidal current data for the calculation area, and establishing a tidal current numerical model for the calculation area; the terrain feature data includes regional boundaries, coastlines, and water depth data for the calculation area; the measured tidal current data includes tidal levels, tidal current velocity, and flow direction data at different locations and times within the calculation area;

[0008] Numerical simulation is performed based on the tidal current numerical model to analyze the spatiotemporal distribution characteristics of the tidal current and obtain the tidal current velocity data for each grid cell in the calculation area;

[0009] Calculate the average power density of tidal energy in each grid cell based on the tidal flow velocity data of each grid cell;

[0010] Calculate the installed density of tidal energy in each grid unit based on the average power density of tidal energy in each grid unit;

[0011] Based on the average power density of tidal energy and water depth and topographic conditions of each grid cell, the first calculation area is selected from the calculation area;

[0012] Based on the environmental engineering conditions required for tidal energy development, a second calculation area is selected from the first calculation area;

[0013] Calculate the theoretically exploitable amount of tidal energy based on the installed capacity density of tidal energy in each grid unit within the first calculation area;

[0014] The actual exploitable amount of tidal energy is calculated based on the installed density of tidal energy in each grid unit in the second calculation area.

[0015] Optionally, obtaining terrain feature data and measured tidal current data of the calculation area and establishing a tidal current numerical model of the calculation area specifically includes:

[0016] Use regular grids or unstructured grids to discretize the calculation area and generate multiple calculation grids within the area boundary;

[0017] Interpolate the water depth data at different locations onto the corresponding computational grid to form the terrain bottom boundary conditions of the numerical model;

[0018] According to the tidal harmonic constant library, the tidal level or tidal flow velocity driving conditions are imposed on the open boundary of the numerical model;

[0019] Select an appropriate numerical model based on the target accuracy and computing power, and set the time step, bottom friction parameters, and boundary condition update frequency for numerical simulation; the numerical models include FVCOM model, Delft3D model, TELEMAC model, and ROMS model;

[0020] Based on the numerical simulation results, model verification error analysis and model calibration are carried out to ensure that the numerical simulation results are consistent with the tidal distribution characteristics and change laws of the calculation area, and a tidal numerical model of the calculation area is established.

[0021] Optionally, the calculating the average power density of tidal energy of each grid unit based on the tidal flow velocity data of each grid unit specifically includes:

[0022] Using the formula Calculate the The average power density of tidal energy per grid cell ;in For the Water density at each grid cell; For the grid cells The current speed at the moment; is the duration; ; is the number of computational grids within the region boundary.

[0023] Optionally, the calculating the tidal energy installed density of each grid unit based on the average tidal energy power density of each grid unit specifically includes:

[0024] Based on the The average power density of tidal energy per grid cell , using the approximate estimation formula Calculate the Tidal energy installed density per grid unit ;in is the tidal energy turbine conversion efficiency; and are the horizontal and vertical distances between tidal energy unit arrays, respectively; is the capacity factor.

[0025] Optionally, the step of selecting the first calculation area from the calculation area based on the average power density of tidal energy and the water depth and topographic conditions of each grid cell specifically includes:

[0026] Within the accounting area The grid unit areas with water depth less than the water depth terrain threshold are regarded as the first undevelopable areas; Filter threshold for average power density;

[0027] The first undevelopable area is removed from the calculation area to obtain the first calculation area.

[0028] Optionally, the second calculation area is selected from the first calculation area based on the environmental engineering conditions required for tidal energy development, specifically including:

[0029] Based on the environmental engineering conditions required for tidal energy development, waterways, ports, anchorages, aquatic genetic resources protection areas, marine ecological protection areas, offshore oil and gas platforms, and submarine pipelines and cables are designated as the second non-developable area;

[0030] The second undevelopable area is removed from the first calculation area to obtain the second calculation area.

[0031] Optionally, calculating the theoretically exploitable amount of tidal energy according to the tidal energy installed capacity density of each grid unit in the first calculation area specifically includes:

[0032] Different tidal energy installed capacity density levels are divided according to the distribution law of tidal energy installed capacity density, and the representative value of each tidal energy installed capacity density level is determined;

[0033] Calculate the sea area under each tidal energy installed density level in the first calculation area;

[0034] Using the formula Calculate the theoretically exploitable amount of tidal energy ;in For the Representative value of each tidal energy installed density level; ; is the number of tidal energy installed density levels; For the first accounting area The sea area under each tidal energy installed capacity density level.

[0035] Optionally, the calculating of the actual exploitable amount of tidal energy according to the tidal energy installed capacity density of each grid unit in the second calculation area specifically includes:

[0036] Using the formula Calculate the actual exploitable amount of tidal energy ;in For the second accounting area The sea area under each tidal energy installed capacity density level.

[0037] In a second aspect, the present application provides a computer device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for calculating the exploitable amount of tidal energy based on installed density.

[0038] In a third aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the method for calculating the exploitable amount of tidal energy based on installed density.

[0039] According to the specific embodiments provided in this application, this application discloses the following technical effects.

[0040] This application provides a method, device, and product for calculating the exploitable amount of tidal energy based on installed capacity density. The concept of tidal energy installed capacity density is proposed, and the theoretical exploitable amount of tidal energy and the actual exploitable amount of tidal energy are calculated based on the installed capacity density of tidal energy, thereby achieving accurate calculation of the exploitable amount of tidal energy. In addition, the method of this application does not rely on the vertical section of the tidal waterway, is not limited to the resource assessment of the waterway area, can arbitrarily delineate the calculation area within the plane range for calculation, and supports excluding restrictive or undevelopable areas from the calculation range. It has strong operability, can achieve accurate assessment of the exploitable amount of tidal energy resources, and expands the scope of application of the calculation method. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 This is a flow chart of a method for calculating the exploitable amount of tidal energy based on installed capacity density for this application;

[0043] Figure 2 A schematic diagram of a tide level verification comparison curve in an exemplary embodiment;

[0044] Figure 3 Schematic diagram of tidal flow velocity verification comparison curve in an exemplary embodiment;

[0045] Figure 4 Schematic diagram of tidal flow direction verification comparison curve in an exemplary embodiment. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0047] This application proposes a method, equipment and product for calculating the exploitable amount of tidal energy based on installed capacity density, which takes into account changes in water depth and terrain and can calculate the exploitable amount of tidal energy resources in the plane dimension, providing a scientific basis for accurately evaluating the exploitable amount of tidal energy and expanding the scope of application of the calculation method.

[0048] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0049] In an exemplary embodiment, Figure 1 As shown, a method for calculating the exploitable amount of tidal energy based on installed capacity density is provided, including the following steps 1 to 8.

[0050] Step 1: Obtain the terrain characteristic data and measured tidal current data of the calculation area, and establish a tidal current numerical model for the calculation area.

[0051] Collection and accounting area Data on topographic features within the calculation area, such as coastline and water depth, as well as measured tidal data such as tide level and tidal velocity, are used for subsequent ocean numerical simulations, model verification, and calibration. Topographic data for the calculation area may include the area boundary, coastline, and water depth. Measured tidal data include tide level, tidal velocity (referred to as flow velocity), and flow direction at different locations and times within the calculation area.

[0052] Furthermore, the construction includes the accounting area The numerical model of tidal current is used to conduct model verification error analysis and model calibration, so that the numerical simulation results can reflect the tidal current distribution characteristics and change laws in the calculation area.

[0053] First, according to the target research area (accounting area ) coastline, topographic features and research needs, define the scope of ocean numerical simulation, that is, delineate the calculation area Use regular grid or unstructured grid to calculate the area Discretization is performed to generate multiple computational grids within the regional boundaries, ensuring that the regional boundaries accurately depict coastline details. Each computational grid is called a grid cell. Water depth data at different locations is interpolated onto the corresponding computational grid to form the topographic bottom boundary conditions of the numerical model. Based on a library of tidal harmonic constants, tidal or tidal velocity driving conditions are applied to the open boundaries of the numerical model, along with parameters for physical processes such as bottom friction and wind. Based on the target accuracy and computational power requirements, an appropriate numerical model (such as FVCOM, Delft3D, TELEMAC, or ROMS) is selected, and control parameters such as the time step, bottom friction parameters, and boundary condition update frequency are set. FVCOM (Finite Volume Coastal Ocean Model) is an unstructured triangular mesh architecture, finite volume, free surface, three-dimensional primitive equation ocean numerical model. Delft3D is a powerful software package primarily for free surface water environments, capable of simulating two- and three-dimensional water flow, waves, water quality, ecology, sediment transport, and bottom topography, as well as the interactions between these processes. TELEMAC is a finite element method-based hydrodynamic and hydrological simulation software primarily used to simulate and analyze various complex hydrological phenomena. ROMS (Regional Ocean Modeling System) is an open-source, three-dimensional regional ocean model widely used to simulate motions at all scales (from global-scale circulation to water movement in rivers and channels), as well as for research on air-sea coupling, marine biology, marine geology, and sea ice. Numerical simulations are performed based on the selected numerical model and the above model settings. Model validation and error analysis are then performed based on the simulation results. Model calibration is then performed to ensure that the simulation results are consistent with the tidal distribution characteristics and variations of the calculation area, thereby establishing a numerical tidal model for the calculation area.

[0054] Step 2: Perform numerical simulation based on the tidal current numerical model, analyze the spatiotemporal distribution characteristics of the tidal current, and obtain the tidal current velocity data for each grid cell in the calculation area.

[0055] The tidal numerical model constructed in this application is a computer simulation model based on the continuity equation, momentum equation and other control equations, and has the following characteristics: the calculation area is realized through gridding High-resolution description of internal tidal currents; able to dynamically simulate the time-varying characteristics of tides and water flows; can be used for both local refined simulations and scalable to overall analysis at the regional scale. The constructed tidal numerical model is mainly used to analyze the spatiotemporal distribution characteristics of tidal currents; simulate the seawater dynamic process driven by tides, providing a basis for hydrodynamic resource assessment; and support the site selection and design of marine engineering projects, such as tidal energy development and coastal protection project optimization. The construction and application of the tidal numerical model of this application provides scientific and accurate flow field data for the research area in the entire research system, which is the basic condition for the implementation of subsequent technical solutions.

[0056] In an exemplary embodiment, a certain archipelago sea area is used as the object, and an unstructured triangular mesh is divided to better fit the coastline. The mesh is then refined near the archipelago to obtain the bathymetric terrain and numerical mesh division results. Numerical simulation is performed based on the selected numerical model and corresponding model settings. Based on the numerical simulation results, a model verification error analysis is performed and a model calibration is carried out. The obtained verification comparison curves of tide level, current velocity and flow direction are shown as follows: Figure 2 、 Figure 3 and Figure 4 shown. Figure 2 The horizontal axis is time, the vertical axis is tide level, the unit is m, the scattered points represent the measured tide level, and the solid line represents the simulated tide level. Figure 3 The horizontal axis is time, the vertical axis is flow velocity, the unit is m / s, the scattered points represent the measured flow velocity, and the solid line represents the simulated flow velocity. Figure 4 The horizontal axis is time, the vertical axis is flow direction, the unit is deg, the scattered points represent the measured flow direction, and the solid line represents the simulated flow direction. Figure 2 、 Figure 3 and Figure 4 The results show that the tidal numerical model established according to the method of this application has a good fitting effect on the measured tidal level, flow velocity and flow direction data, and can provide an accurate and scientific numerical basis for subsequent work.

[0057] Step 3: Calculate the average power density of tidal energy in each grid cell based on the tidal flow velocity data of each grid cell.

[0058] Based on the flow velocity, flow direction and other results obtained by numerical simulation, the average power density of tidal energy in each grid unit can be calculated, and the average power density distribution diagram can be drawn to evaluate its distribution characteristics. The average power density of the tidal energy for each grid unit is calculated according to the following formula (1):

[0059] (1);

[0060] in, Indicates the The average power density of the tidal energy per grid unit, also referred to as average power density or power density, is expressed in W / m 2 ; For the Water density at each grid cell; For the grid cells The current speed at the moment; For duration. ; is the number of computational grids within the region boundary.

[0061] According to the calculated power density of each grid cell , draw its power density distribution diagram, which can be used to evaluate its power density distribution characteristics.

[0062] Step 4: Calculate the installed density of tidal energy for each grid cell based on the average power density of tidal energy for each grid cell.

[0063] Based on the The average power density of tidal energy per grid cell , calculate the approximate value of Rated installed power of a single tidal energy unit in a grid unit :

[0064] (2);

[0065] in, is the tidal energy turbine conversion efficiency. is the capacity factor. is the sea sweeping area of the impeller of the tidal energy unit, , is the turbine impeller diameter.

[0066] The sea area occupied by a single tidal energy unit in a tidal energy unit array Calculate according to the following formula (3):

[0067] (3);

[0068] in and They are the horizontal and vertical distances between tidal energy arrays, which can be obtained according to the document “Assessment of Tidal Energy Resource” issued by EMEC (European Marine Energy Centre). =2.5, =10.

[0069] The installed density of tidal energy is calculated according to the following formula (4):

[0070] (4).

[0071] Combining formulas (2), (3) and (4), we can get the installed density of tidal energy: The specific calculation formula is as follows:

[0072] (5);

[0073] in For the The installed density of tidal energy per grid unit, also referred to as installed density or installed capacity, is expressed in W / m 2 .

[0074] The capacity factor The calculation formula is as follows:

[0075] (6);

[0076] Where, is the water density; For the moment, is the tidal flow velocity at each moment, This application comprehensively considers the potential of tidal energy extraction from turbines and the current technical level. Take it as a constant, 30%.

[0077] In certain exemplary embodiments, when =2.5, =10, =30%, when =40%, ; =53%, ; =35%, .

[0078] This application proposes the concept of tidal energy installed capacity density and derives the calculation formula (5) through formula derivation. The formula (5) takes into account the average power density of tidal energy, turbine impeller diameter, tidal energy turbine conversion efficiency, capacity coefficient and unit array spacing, etc., providing a new technical path for the evaluation of the exploitable amount of tidal energy.

[0079] Step 5: Based on the average power density of tidal energy and water depth and topographic conditions of each grid cell, the first calculation area is selected from the calculation area.

[0080] In this application, the development conditions that need to be met for tidal energy development refer to a series of physical, resource, environmental and engineering conditions that need to be met for tidal energy development, which are mainly divided into the following aspects: water depth and terrain conditions, tidal energy resource conditions and environmental engineering conditions. Among them, the water depth and terrain conditions refer to the requirements for the distribution of water depth and seabed terrain in the calculation area. The water depth will affect the installation and operation of the equipment. Waters that are too shallow or too deep are not suitable for tidal energy development. Therefore, it is necessary to exclude these unsuitable areas by analyzing the seabed terrain and water depth data. Resource conditions refer to the minimum requirements for tidal energy resources in the developable area, usually measured by the average power density of tidal energy. Environmental engineering conditions refer to a series of environmental and engineering conditions that need to be met for tidal energy development. For example, in terms of environment, it is necessary to avoid areas such as aquatic genetic resources protection areas and marine ecological protection areas. In terms of engineering, it is necessary to avoid waterways, ports, anchorages, offshore oil and gas platforms, and submarine pipelines and cables. Based on the comprehensive evaluation results of factors such as water depth and terrain conditions, tidal energy resource conditions and environmental engineering conditions, areas that do not meet the development conditions will be removed and can be removed from the calculation area. Filter out the first accounting area and the second accounting area For example, from the accounting area The first calculation area can be obtained by removing the areas with less than the average power density screening threshold and less than the water depth terrain threshold. . Further, from the first calculation area The second calculation area can be obtained by removing the areas that do not meet the environmental engineering conditions. .

[0081] Specifically, in step 5, the calculation area The grid unit areas with water depth less than the water depth terrain threshold are regarded as the first undevelopable areas. Remove the inner area to get the first calculation area .in is the average power density screening threshold, preferably 270W / m 2 The water depth terrain threshold can be set to 5m.

[0082] In the exemplary embodiment of the present application, according to the power density distribution diagram drawn, the average power density of tidal energy <270W / m 2 , sea areas with water depth <5m are regarded as the first undevelopable area. After removing the first undevelopable area, the first accounting area can be obtained. .

[0083] Step 6: Based on the environmental engineering conditions required for tidal energy development, select the second calculation area from the first calculation area.

[0084] Based on the environmental engineering conditions that must be met for tidal energy development, the avoidance areas of waterways, ports, anchorages, aquatic germplasm resource protection areas, marine ecological protection areas, offshore oil and gas platforms, and submarine pipelines and cables are designated as the second non-developable area. Remove the inner and get the second calculation area .

[0085] In the exemplary embodiment of this application, the channel width of 200 meters is regarded as the avoidance range and removed as the second non-developable area to obtain the second calculation area. .

[0086] Step 7: Calculate the theoretically exploitable amount of tidal energy based on the installed capacity density of tidal energy in each grid unit within the first calculation area.

[0087] According to the installed density of tidal energy, the calculation area is divided into different tidal energy installed density levels, and the sea area under each tidal energy installed density level in the calculation area is calculated, and then the tidal energy exploitable amount in the calculation area is calculated. and the second accounting area Calculate the theoretical exploitable amount of tidal energy The actual exploitable amount of tidal energy .

[0088] First, we divide different tidal energy installed capacity density levels according to the distribution law of tidal energy installed capacity density, and determine the representative value of each tidal energy installed capacity density level. The representative value of each tidal energy installed density level is recorded as .

[0089] For example, in the exemplary embodiment of this application, the tidal energy installed density is It is divided into six levels as shown in Table 1. The unit of tidal energy installed density is W / m 2 .

[0090] Table 1 Tidal energy installed capacity density levels and their representative values

[0091]

[0092] As shown in Table 1, the representative value of the first tidal energy installed density level is 30W / m 2 The representative value of the second tidal energy installed density level is 70W / m 2 , and so on.

[0093] Furthermore, it is necessary to count the first accounting area The sea area under each tidal energy installed capacity density level. For example, if the first calculation area Neidi Tidal energy installed density per grid unit Divided into The grid unit is recorded as ; Then count all the levels Grid cells The corresponding calculation area is .

[0094] The theoretical exploitable amount of tidal energy is calculated according to the following formula (7): :

[0095] (7);

[0096] in For the Representative value of each tidal energy installed density level; ; It is the number of tidal energy installed density levels. The first accounting area Neidi The sea area under each tidal energy installed capacity density level.

[0097] Step 8: Calculate the actual exploitable amount of tidal energy based on the installed density of tidal energy in each grid unit in the second calculation area.

[0098] Similarly, if the second calculation area Neidi Tidal energy installed density per grid unit Divided into The grid unit is recorded as ; Then count all the levels Grid cells The corresponding calculation area is The actual exploitable amount of tidal energy is The calculation formula is as follows:

[0099] (8);

[0100] in The second accounting area Neidi The sea area under each tidal energy installed capacity density level.

[0101] The installed capacity density (installed capacity) distribution map reflects the development potential of tidal energy at different locations in the calculation area, which can be used to determine the high-value areas of tidal energy resources in the calculation area, so as to carry out subsequent development. Distribution map of installed density of tidal energy at each level and the second calculation area The distribution diagram of installed capacity density of each level of tidal energy is calculated based on this. and , we can further calculate the theoretical exploitable amount of tidal energy The actual exploitable amount of tidal energy .

[0102] The theoretically exploitable amount of tidal energy Refers to the accounting area The maximum power generation capacity calculated based on the potential of tidal energy resources within the period, assuming that 100% of the resources can be utilized. Can provide accounting area The upper limit of tidal energy resources in the interior. In multiple candidate areas, by comparing the theoretically exploitable amount of tidal energy The resource advantages and disadvantages among various alternative regions can be determined, thereby supporting tidal energy development planning and engineering project layout.

[0103] Actual exploitable amount of tidal energy The calculation of the actual exploitable amount of tidal energy takes into account the factors of technical level and development sea area limitation, which is a realistic reflection of the theoretical exploitable amount. It can provide a basis for formulating specific engineering development plans and determine the layout density and scale of tidal energy equipment. Combined with the total project cost, it is also possible to evaluate the return on investment and optimize the development plan.

[0104] In the calculation method of the tidal energy exploitable amount based on the installed density in this application, according to the average power density of tidal energy , turbine impeller diameter , tidal energy turbine conversion efficiency , capacity factor and the spacing between the arrays 、 Parameters such as tidal energy installed capacity density calculation method was established, and based on the tidal energy installed capacity density The theoretical exploitable amount of tidal energy was proposed The actual exploitable amount of tidal energy This method does not rely on the vertical section of the waterway and is not limited to the resource assessment of the waterway area. It can arbitrarily delineate the accounting area in the plane range for calculation, and supports excluding restrictive or undevelopable areas from the accounting scope. It has strong operability and can effectively make up for the shortcomings of previous methods such as limited resource assessment scope and incomplete consideration of assessment factors. It is of great significance for accurately evaluating the exploitable amount of tidal energy resources.

[0105] In an exemplary embodiment, the present application also provides a computer device, which can be a server or a terminal. The computer device includes a processor, a memory, an input / output interface, and a communication interface. The processor, the memory, and the input / output interface are connected via a system bus, and the communication interface is connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, the method for calculating the exploitable amount of tidal energy based on installed density is implemented.

[0106] In an exemplary embodiment, the present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the method for calculating the exploitable amount of tidal energy based on installed capacity density.

[0107] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by hardware associated with computer program instructions. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the above-described method embodiments. Any reference to memory or other media in the various embodiments provided herein may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, and the like. Volatile memory may include random access memory (RAM) or external cache memory, and the like. By way of illustration and not limitation, RAM may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0108] It should be noted that the information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0109] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0110] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core concept of this application. At the same time, for those skilled in the art, based on the concept of this application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for calculating the exploitable amount of tidal energy based on installed capacity density, characterized in that: include: Obtaining terrain feature data and measured tidal current data for the calculation area, and establishing a tidal current numerical model for the calculation area; the terrain feature data includes regional boundaries, coastlines, and water depth data for the calculation area; the measured tidal current data includes tidal levels, tidal current velocity, and flow direction data at different locations and times within the calculation area; Numerical simulation is performed based on the tidal current numerical model to analyze the spatiotemporal distribution characteristics of the tidal current and obtain the tidal current velocity data for each grid cell in the calculation area; Calculate the average power density of tidal energy in each grid cell based on the tidal flow velocity data of each grid cell; Calculate the installed density of tidal energy in each grid unit based on the average power density of tidal energy in each grid unit; Based on the The average power density of tidal energy per grid cell , according to the formula Approximate calculation Rated installed power of a single tidal energy unit in a grid unit ;in, is the tidal energy turbine conversion efficiency; is the capacity factor; is the sea sweeping area of the impeller of the tidal energy unit, , is the turbine impeller diameter; The sea area occupied by a single tidal energy unit in a tidal energy unit array According to the formula Calculate; where and are the horizontal and vertical distances between tidal energy unit arrays, respectively; According to the formula Calculate the installed density of tidal energy; For the Tidal energy installed capacity density of each grid unit; Based on the average power density of tidal energy and water depth and topographic conditions of each grid cell, the first calculation area is selected from the calculation area; The first calculation area is selected from the calculation area based on the average power density of tidal energy and the water depth and topographic conditions of each grid cell, specifically including: Within the accounting area The grid unit areas with water depth less than the water depth terrain threshold are regarded as the first undevelopable areas; Filter threshold for average power density; The first undevelopable area is removed from the calculation area to obtain the first calculation area; Based on the environmental engineering conditions required for tidal energy development, a second calculation area is selected from the first calculation area; The second calculation area is selected from the first calculation area based on the environmental engineering conditions required for tidal energy development, specifically including: Based on the environmental engineering conditions required for tidal energy development, waterways, ports, anchorages, aquatic genetic resources protection areas, marine ecological protection areas, offshore oil and gas platforms, and submarine pipelines and cables are designated as the second non-developable area; The second undevelopable area is removed from the first calculation area to obtain a second calculation area; Calculate the theoretically exploitable amount of tidal energy based on the installed capacity density of tidal energy in each grid unit within the first calculation area; Calculating the theoretically exploitable amount of tidal energy based on the installed density of tidal energy in each grid unit within the first calculation area specifically includes: Different tidal energy installed capacity density levels are divided according to the distribution law of tidal energy installed capacity density, and the representative value of each tidal energy installed capacity density level is determined; Calculate the sea area under each tidal energy installed density level in the first calculation area; Using the formula Calculate the theoretically exploitable amount of tidal energy ;in For the Representative value of each tidal energy installed density level; ; is the number of tidal energy installed density levels; For the first accounting area The sea area under each tidal energy installed capacity density level; Calculate the actual exploitable amount of tidal energy based on the installed density of tidal energy in each grid unit within the second calculation area; Calculating the actual exploitable amount of tidal energy based on the tidal energy installed capacity density of each grid unit in the second calculation area specifically includes: Using the formula Calculate the actual exploitable amount of tidal energy ;in For the second accounting area The sea area under each tidal energy installed capacity density level.

2. The method for calculating the exploitable amount of tidal energy based on installed capacity density according to claim 1 is characterized in that: The acquisition of terrain feature data and measured tidal current data of the calculation area and the establishment of a tidal current numerical model of the calculation area specifically includes: Use regular grids or unstructured grids to discretize the calculation area and generate multiple calculation grids within the area boundary; Interpolate the water depth data at different locations onto the corresponding computational grid to form the terrain bottom boundary conditions of the numerical model; According to the tidal harmonic constant library, the tidal level or tidal flow velocity driving conditions are imposed on the open boundary of the numerical model; Select an appropriate numerical model based on the target accuracy and computing power, and set the time step, bottom friction parameters, and boundary condition update frequency for numerical simulation; the numerical models include FVCOM model, Delft3D model, TELEMAC model, and ROMS model; Based on the numerical simulation results, model verification error analysis and model calibration are carried out to ensure that the numerical simulation results are consistent with the tidal distribution characteristics and change laws of the calculation area, and a tidal numerical model of the calculation area is established.

3. The method for calculating the exploitable amount of tidal energy based on installed capacity density according to claim 2 is characterized in that: The calculation of the average power density of tidal energy of each grid unit based on the tidal flow velocity data of each grid unit specifically includes: Using the formula Calculate the The average power density of tidal energy per grid cell ;in For the Water density at each grid cell; For the grid cells The current speed at the moment; is the duration; ; is the number of computational grids within the region boundary.

4. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for calculating the exploitable amount of tidal energy based on installed density as claimed in any one of claims 1 to 3.

5. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the method for calculating the exploitable amount of tidal energy based on installed density according to any one of claims 1 to 3 is implemented.

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