Tidal current energy developable quantity accounting method, equipment and product based on installed density

Abstract

The invention discloses a tidal current energy developable quantity accounting method, equipment and product based on installed density, and relates to the field of tidal current energy development. The method comprises the steps of firstly obtaining topographic feature data and actually measured power flow data of an accounting area and establishing a power flow numerical model; performing numerical simulation based on a tidal current numerical model to obtain tidal current flow velocity data of each grid unit in the accounting area, and calculating tidal current energy average power density and tidal current energy installed density of each grid unit according to the tidal current flow velocity data; based on the tidal current energy average power density and the water depth topographic condition of each grid unit, screening out a first accounting area from the accounting areas; screening out a second accounting area from the first accounting area based on environmental engineering conditions required to be met by tidal current energy development; the theoretical developable amount and the actual developable amount of the tidal current energy are calculated according to the tidal current energy installed density of each grid unit in the first accounting area and the second accounting area, the accuracy of the tidal current energy developable amount accounting is improved, and the application range of the accounting method is expanded.

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] Under the current background of tidal energy development, carrying out the calculation of the exploitable amount of tidal energy and finding out the reserves of tidal energy resources are the basic support for the development planning and project layout of tidal energy, and are the basic conditions for realizing the large-scale development and utilization of tidal energy. Therefore, studying the calculation method of the exploitable amount of tidal energy resources is an important basic work to support the large-scale utilization of tidal energy.

[0003] At present, the methods for estimating the exploitable amount of tidal energy can be generally divided into two types, namely, the method based on energy flux (Farm method and Flux method) and the method based on dynamic analysis (Garrett method). The Flux method and the Garrett method are based on a vertical section of a tidal channel, with the tidal channel as the calculation unit. Therefore, the spatial scope of resource assessment is limited and the characteristics of the turbine are not considered. Although the Farm method takes into account representative models, it does not consider the adaptability of turbine characteristics to water depth and terrain, and the differences in the exploitable amount obtained by using models with different technical parameters are also large. Therefore, the existing methods for estimating the exploitable amount of tidal energy generally have the problems of limited scope of use and inaccurate calculation of the exploitable amount of tidal energy due to 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: Obtaining terrain feature data and measured tidal current data of the calculation area, and establishing a tidal current numerical model of the calculation area; the terrain feature data includes the regional boundary, coastline and water depth data of the calculation area; the measured tidal current data includes the tidal level, tidal current velocity and flow direction data at different locations and times in the calculation area; Based on the tidal current numerical model, numerical simulation is carried out to analyze the spatiotemporal distribution characteristics of the tidal current and obtain the tidal current velocity data of each grid unit 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; The installed capacity density of tidal energy in each grid unit is calculated based on the average power density of tidal energy in 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; Based on the environmental engineering conditions that need to be met for tidal energy development, a second calculation area is selected from the first calculation area; Calculate the theoretically exploitable amount of tidal energy according to the installed capacity density of tidal energy in each grid unit in the first calculation area; The actual exploitable amount of tidal energy is calculated based on the installed capacity density of tidal energy in each grid unit in the second calculation area.

[0007] Optionally, the obtaining of 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: 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 current velocity driving conditions are imposed on the open boundary of the numerical model; Select an appropriate numerical model according to 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 is carried out and model calibration is carried out to ensure that the numerical simulation results are consistent with the tidal distribution characteristics and change laws of the calculation area, and to establish a tidal numerical model of the calculation area.

[0008] 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: Using formula Calculate the The average power density of the tidal current energy per grid cell ;in For the Water density at each grid cell; For the Grid cells The current flow rate at the moment; for duration; ; is the number of computational grids within the region boundary.

[0009] Optionally, the calculating the tidal energy installed capacity density of each grid unit based on the tidal energy average power density of each grid unit specifically includes: Based on The average power density of the tidal current energy per grid cell , using the approximate estimation formula Calculate the Tidal current energy installed density per grid unit ;in is the tidal energy turbine conversion efficiency; and are the lateral and longitudinal distances between tidal energy unit arrays, respectively; is the capacity factor.

[0010] Optionally, the step of selecting a 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 unit specifically includes: 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.

[0011] Optionally, the second calculation area is selected from the first calculation area based on the environmental engineering conditions that need to be met for tidal energy development, specifically including: Based on the environmental engineering conditions that need to be met for tidal energy development, waterways, ports, anchorages, aquatic germplasm resource protection areas, marine ecological protection areas, offshore oil and gas platforms, and submarine pipelines and cables are considered the second non-developable areas; The second undevelopable area is removed from the first calculation area to obtain the second calculation area.

[0012] Optionally, the calculating of 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: 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 capacity density level in the first calculation area; Using formula Calculate the theoretical exploitable amount of tidal energy ;in For the The representative value of each tidal energy installed density level; ; is the number of tidal energy installed capacity density levels; The first accounting area The sea area under each tidal energy installed capacity density level.

[0013] Optionally, the calculating 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: Using formula Calculate the actual exploitable amount of tidal energy ;in In the second accounting area The sea area under each tidal energy installed capacity density level.

[0014] In a second aspect, the present application provides a computer device, including: 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 capacity density.

[0015] 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 capacity density.

[0016] According to the specific embodiments provided in this application, this application discloses the following technical effects.

[0017] The present application provides a method, device and product for calculating the exploitable amount of tidal energy based on installed capacity density, proposes the concept of installed capacity density of tidal energy, and calculates the theoretical exploitable amount of tidal energy and the actual exploitable amount of tidal energy based on the installed capacity density of tidal energy, thereby realizing the accurate calculation of the exploitable amount of tidal energy. In addition, the method of the present 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 define 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 realize the accurate assessment of the exploitable amount of tidal energy resources, and expands the scope of use of the calculation method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. 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 paying creative work.

[0019] Figure 1 A flow chart of a method for calculating the exploitable amount of tidal energy based on installed capacity density for this application; Figure 2 It is a schematic diagram of a tide level verification comparison curve in an exemplary embodiment; Figure 3 It is a schematic diagram of a tidal flow velocity verification comparison curve in an exemplary embodiment; Figure 4 It is a schematic diagram of the tidal flow direction verification comparison curve in the exemplary embodiment. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] The present application proposes a method, device and product for calculating the exploitable amount of tidal energy based on installed capacity density, which takes into account the 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.

[0022] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] 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.

[0024] Step 1: Obtain the terrain feature data and measured tidal current data of the calculation area, and establish a tidal current numerical model of the calculation area.

[0025] Collection and accounting area The terrain feature data such as coastline, water depth and other data within the calculation area, as well as the measured tidal data such as tide level and tidal velocity, are used for subsequent ocean numerical simulation and model verification and calibration. The terrain feature data of the calculation area may include data such as the regional boundary, coastline and water depth of the calculation area. The measured tidal data include data such as tide level, tidal velocity (referred to as flow velocity) and flow direction at different locations and times within the calculation area.

[0026] Furthermore, the construction includes the calculation area The tidal numerical model is used to conduct model verification error analysis and model calibration, so that the numerical simulation results can reflect the tidal distribution characteristics and changing laws in the calculation area.

[0027] First, according to the target research area (accounting area )’s 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 boundary to ensure that the regional boundary can accurately describe the details of the coastline. Each computational grid is called a grid cell. The water depth data at different locations are interpolated to the corresponding computational grid to form the terrain bottom boundary conditions of the numerical model. According to the tidal harmonic constant library, the tide level or tidal flow velocity driving conditions are applied to the open boundary of the numerical model, and the setting parameters of physical processes such as bottom friction and wind field are applied. According to the requirements of target accuracy and computing power, an appropriate numerical model (such as FVCOM, Delft3D, TELEMAC, ROMS, etc.) is selected, and control parameters such as time step, bottom friction parameter and boundary condition update frequency are set. Among them, FVCOM (Finite Volume Coastal Ocean Model) is an unstructured triangular grid architecture, finite volume, free surface, three-dimensional primitive equation ocean numerical model. Delft3D is a powerful software package that is mainly used in free surface water environments and can simulate two-dimensional and three-dimensional water flow, waves, water quality, ecology, sediment transport and bed topography, as well as the interaction between various processes. ‌TELEMAC‌ is a hydrodynamic and hydrological simulation software based on the finite element method, mainly used to simulate and analyze various complex hydrological phenomena. ‌ROMS (Regional Ocean Modeling System) is an open source three-dimensional regional ocean model, which is widely used in the simulation of various scale movements (from global scale circulation to water movement in rivers and channels), as well as research in the fields of sea-air coupling, marine biology, marine geology and sea ice. ‌‌Based on the selected numerical model and the above model settings, numerical simulation is performed, and model verification error analysis is performed based on the numerical simulation results, and model calibration is carried out to ensure that the numerical simulation results are consistent with the distribution characteristics and change laws of tidal currents in the calculation area, thereby establishing a numerical tidal current model for the calculation area.

[0028] 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 unit in the calculation area.

[0029] The tidal current 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 currents; can be used for local refined simulations, and can also be expanded to overall analysis at a 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 the assessment of hydrodynamic resources; 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, and is the basic condition for the implementation of subsequent technical solutions.

[0030] In an exemplary embodiment, a certain archipelago sea area is taken as the object, and an unstructured triangular grid with a better fit to the coastline is divided. The grid is encrypted near the archipelago to obtain the water depth terrain and numerical grid division results. Numerical simulation is performed based on the selected numerical model and the corresponding model settings, and model verification error analysis is performed based on the numerical simulation results. Model calibration is carried out, and the verification comparison curves of tide level, flow velocity and flow direction are obtained as shown below. 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 degree, 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.

[0031] 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.

[0032] 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 current energy is calculated according to the following formula (1): (1); in, Indicates 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.

[0033] 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.

[0034] Step 4: Calculate the installed capacity density of tidal energy for each grid unit based on the average power density of tidal energy for each grid unit.

[0035] Based on The average power density of the tidal current energy per grid cell , according to the following formula (2) to approximately calculate the Rated installed power of a single tidal energy unit in a grid unit : (2); 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.

[0036] The sea area used by a single tidal energy unit in a tidal energy unit array Calculate according to the following formula (3): (3); in and are the lateral and longitudinal distances between tidal energy generator arrays, respectively. They can be obtained according to the Assessment of Tidal Energy Resource document issued by EMEC (European Marine Energy Centre). =2.5, =10.

[0037] The installed density of tidal energy is calculated according to the following formula (4): (4).

[0038] Combining formulas (2), (3) and (4), we can get the installed density of tidal energy: The specific calculation formula is as follows: (5); in For the The installed capacity density of tidal energy per grid unit is also referred to as installed capacity or installed density, and the unit is W / m 2 .

[0039] The capacity factor The calculation formula is as follows: (6); In the formula, is the water density; For the moment, is the tidal flow velocity at each moment, is the rated flow rate of the turbine. This application comprehensively considers the potential of tidal energy resources extracted by turbines and the current technical level. Take it as a constant, 30%.

[0040] In certain exemplary embodiments, when =2.5, =10, =30%, when =40%, ; =53%, ; =35%, .

[0041] This application proposes the concept of tidal energy installed capacity density and derives the calculation formula (5) through the formula. The formula (5) takes into account the average power density of tidal energy, the diameter of the turbine impeller, the conversion efficiency of the tidal energy turbine, the capacity coefficient and the spacing of the unit array, etc., providing a new technical path for the evaluation of the exploitable amount of tidal energy.

[0042] Step 5: Based on the average power density of tidal energy and water depth and terrain conditions of each grid cell, the first calculation area is selected from the calculation area.

[0043] 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 terrain conditions, tidal energy resource conditions and environmental engineering conditions. Among them, the water depth 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 exploitable 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 the environment, it is necessary to avoid areas such as aquatic germplasm resource 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. Areas. According to the comprehensive evaluation results of factors such as water depth terrain conditions, tidal energy resource conditions and environmental engineering conditions, areas that do not meet the development conditions are removed and can be removed from the calculation area. Filter out the first calculation 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. .

[0044] 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 part and 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.

[0045] 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 a water depth of less than 5m are regarded as the first undevelopable area. After removing the first undevelopable area, the first accounting area can be obtained. .

[0046] Step 6: Based on the environmental engineering conditions that need to be met for tidal energy development, select the second calculation area from the first calculation area.

[0047] Based on the environmental engineering conditions that need to be met for tidal energy development, waterways, ports, anchorages, aquatic germplasm resource protection areas, marine ecological protection areas, offshore oil and gas platforms, and the avoidance range of submarine pipelines and cables are regarded as the second non-developable area. Remove the inner part and get the second calculation area .

[0048] In the exemplary embodiment of the present 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 .

[0049] Step 7: Calculate the theoretically exploitable amount of tidal energy based on the installed capacity density of tidal energy in each grid unit in the first calculation area.

[0050] According to the installed capacity density of tidal energy, the calculation area is divided into different tidal energy installed capacity density levels, and the sea area under each tidal energy installed capacity 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 .

[0051] First, according to the distribution law of tidal energy installed capacity density, different tidal energy installed capacity density levels are divided, and the representative value of each tidal energy installed capacity density level is determined. The representative value of the installed density level of tidal energy is recorded as .

[0052] For example, in the exemplary embodiment of the present application, the tidal energy installed capacity density is It is divided into six levels as shown in Table 1. The unit of tidal energy installed capacity density is W / m 2 .

[0053] Table 1 Tidal energy installed capacity density levels and their representative values

[0054] 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.

[0055] 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 current energy installed density per grid unit Divided into The grid unit is recorded as ; Then count all the levels The grid cell The corresponding calculation area is .

[0056] The theoretical exploitable amount of tidal energy is calculated according to the following formula (7): : (7); in For the 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.

[0057] Step 8: Calculate the actual exploitable amount of tidal energy based on the installed capacity density of tidal energy in each grid unit in the second calculation area.

[0058] Similarly, if the second calculation area Neidi Tidal current energy installed density per grid unit Divided into The grid unit is recorded as ; Then count all the levels The grid cell The corresponding calculation area is The actual exploitable amount of tidal energy is The calculation formula is as follows: (8); in The second accounting area Neidi The sea area under each tidal energy installed capacity density level.

[0059] The installed capacity density (installed capacity) distribution map reflects the development potential of tidal energy at different locations in the calculation area, and 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 capacity 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 .

[0060] The theoretical exploitable amount of tidal energy Refers to the accounting area The maximum power generation calculated based on the potential of tidal energy resources within the year, assuming that 100% of the resources can be utilized. Theoretical exploitable amount of tidal energy Can provide accounting area The upper limit of the inland tidal energy resources. In multiple candidate areas, by comparing the theoretically exploitable tidal energy The resource advantages and disadvantages among various alternative regions can be determined, thereby supporting tidal energy development planning and engineering project layout.

[0061] The actual exploitable amount of tidal energy The calculation of the actual exploitable tidal energy takes into account the technical level factors and the development sea area restrictions, 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.

[0062] In the calculation method of the exploitable amount of tidal energy based on installed capacity 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 of the array , A calculation method for tidal energy installed capacity density was established based on the tidal energy installed capacity density. The theoretical exploitable amount of tidal energy was proposed The actual exploitable amount of tidal energy A calculation method is proposed. 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 calculation area in the plane range for calculation, and supports excluding restrictive or undevelopable areas from the calculation 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 assessing the exploitable amount of tidal energy resources.

[0063] In an exemplary embodiment, the present application also provides a computer device, which may 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.

[0064] 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.

[0065] It can be understood by a person skilled in the art that all or part of the processes in the above-mentioned embodiment method can be completed by hardware related to computer program instructions, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the process of the embodiment of the above-mentioned method. Among them, any reference to the memory or other medium in each embodiment provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. 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).

[0066] 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.

[0067] The technical features of the above embodiments may 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.

[0068] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will 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 of the calculation area, and establishing a tidal current numerical model of the calculation area; the terrain feature data includes the regional boundary, coastline and water depth data of the calculation area; the measured tidal current data includes the tidal level, tidal current velocity and flow direction data at different locations and times in the calculation area; Based on the tidal current numerical model, numerical simulation is carried out to analyze the spatiotemporal distribution characteristics of the tidal current and obtain the tidal current velocity data of each grid unit 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; The installed capacity density of tidal energy in each grid unit is calculated based on the average power density of tidal energy in 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; Based on the environmental engineering conditions that need to be met for tidal energy development, a second calculation area is selected from the first calculation area; Calculate the theoretically exploitable amount of tidal energy according to the installed capacity density of tidal energy in each grid unit in the first calculation area; The actual exploitable amount of tidal energy is calculated based on the installed capacity density of tidal energy in each grid unit in the second calculation area.

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 obtaining of 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: 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 current velocity driving conditions are imposed on the open boundary of the numerical model; Select an appropriate numerical model according to 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 is carried out and model calibration is carried out to ensure that the numerical simulation results are consistent with the tidal distribution characteristics and change laws of the calculation area, and to establish a tidal numerical model of the calculation area.

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 step of 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: Using formula Calculate the The average power density of the tidal current energy per grid cell ;in For the Water density at each grid cell; For the Grid cells The current flow rate at the moment; for duration; ; is the number of computational grids within the region boundary.

4. The method for calculating the exploitable amount of tidal energy based on installed capacity density according to claim 3 is characterized in that: The calculation of the tidal energy installed capacity density of each grid unit based on the average tidal energy power density of each grid unit specifically includes: Based on The average power density of the tidal current energy per grid cell , using the approximate estimation formula Calculate the Tidal current energy installed density per grid unit ;in is the tidal energy turbine conversion efficiency; and are the lateral and longitudinal distances between tidal energy unit arrays, respectively; is the capacity factor.

5. The method for calculating the exploitable amount of tidal energy based on installed capacity density according to claim 4 is characterized in that: The method of selecting a first calculation area from the calculation area based on the average power density of tidal energy and the water depth and terrain conditions of each grid unit specifically includes: 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.

6. The method for calculating the exploitable amount of tidal energy based on installed capacity density according to claim 5 is characterized in that: The second calculation area is selected from the first calculation area based on the environmental engineering conditions that need to be met for tidal energy development, specifically including: Based on the environmental engineering conditions that need to be met for tidal energy development, waterways, ports, anchorages, aquatic germplasm resource protection areas, marine ecological protection areas, offshore oil and gas platforms, and submarine pipelines and cables are considered the second non-developable areas; The second undevelopable area is removed from the first calculation area to obtain the second calculation area.

7. The method for calculating the exploitable amount of tidal energy based on installed capacity density according to claim 6 is characterized in that: The calculation of 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: 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 capacity density level in the first calculation area; Using formula Calculate the theoretical exploitable amount of tidal energy ;in For the The representative value of each tidal energy installed density level; ; is the number of tidal energy installed capacity density levels; In the first accounting area The sea area under each tidal energy installed capacity density level.

8. The method for calculating the exploitable amount of tidal energy based on installed capacity density according to claim 7 is characterized in that: The calculation 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: Using formula Calculate the actual exploitable amount of tidal energy ;in In the second accounting area The sea area under each tidal energy installed capacity density level.

9. 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 described in any one of claims 1 to 8.

10. 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 capacity density described in any one of claims 1 to 8 is implemented.

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