Suspension Cable Design Method, Device and Cable for Tidal Power Generation Purposes

Abstract

The present invention provides a design method, device and cable for a suspended cable for tidal power generation, belonging to the technical field of cable design. The design method for a suspended cable for tidal power generation provided by an embodiment of the present invention includes: determining historical tidal data and historical wave data of a deployment location based on the deployment location of a tidal power generation device; determining water level data of the deployment location based on the historical tidal data and the historical wave data; determining a first parameter of the cable based on the water level data, and further determining a second parameter, which can effectively solve the adaptability problem of the suspended cable in a complex marine environment in a tidal power station, enable the cable structure to adapt to tides and waves, reduce the forces exerted on the cable under the action of tides and waves, improve the mechanical stability of the cable, ensure the service life of the cable, and thus provide a reliable power transmission guarantee for the stable operation of the tidal power generation device.

Description

Technical Field

[0001] The present invention relates to the technical field of cable design, and particularly to a design method, device and cable for a suspended cable used for tidal power generation. Background Art

[0002] Tidal power generation is a renewable energy technology that converts ocean tidal energy into electrical energy. Its core principle is to drive a turbine to generate electricity through the rise and fall of the tide to form a water level difference or water flow kinetic energy. The setting and design requirements of the floating cable in a tidal power station need to take into account the adaptability to the marine environment, mechanical stability and power transmission efficiency.

[0003] The cable usually leads out from the bottom of the floating power generation device and needs to withstand tidal currents and wave impacts. Generally, aramid fibers or steel wire armoring are used to enhance the tensile strength, and a multi-layer sheath structure (such as an inner waterproof layer, a middle pressure-resistant layer, and an outer wear-resistant layer) is designed to adapt to the complex seabed topography.

[0004] However, the harsh marine environment and the characteristics of the cable being prone to deformation make the cable design extremely difficult. How to design a cable that can adapt to the complex marine environment is an urgent problem to be solved. Summary of the Invention

[0005] The present invention provides a design method for a suspended cable used for tidal power generation, aiming to solve the defect that the cable in the prior art is difficult to adapt to the marine environment, and achieve the effect of improving the adaptability of the suspended cable to tides and sea waves.

[0006] The present invention provides a design method for a suspended cable used for tidal power generation. The cable includes a core wire, a foaming layer and an armoring layer arranged from the inside out. The cable includes two fixed segments directly connected to a tidal power generation device or an energy storage device and a flexible segment suspended in water for power transmission. The flexible segment is connected between the two fixed segments. The method includes:

[0007] Based on the deployment location of the tidal power generation device, determine the historical tidal data and historical wave data of the deployment location;

[0008] Based on the historical tidal data and the historical wave data, determine the water level data of the deployment location; the water level data includes seabed depth data, tide height data and wave height data;

[0009] Based on the water level data, determine the first parameters of the cable; the first parameters include the length of the fixed segment, the number of flexible segments, the length of each flexible segment, the thickness of the foaming layer and the flexibility of the armoring layer;

[0010] Based on the water level data and the first parameter, determine the second parameter of the cable, where the second parameter includes the number and arrangement of buoyancy blocks and counterweights on the flexible section.

[0011] According to a design method of a suspended cable for tidal power generation provided by the present invention, determining the first parameter of the cable based on the water level data includes:

[0012] Based on the water level data, determine the static water depth data of the deployment location;

[0013] Based on the static water depth data, determine the length of the fixed section;

[0014] Based on the length of the fixed section, the maximum tidal range, and the maximum wave height, determine the number of flexible sections and the allowable expansion amount of each flexible section, and based on the allowable expansion amount of each flexible section, determine the thickness of the foaming layer and the flexibility of the armor layer; the allowable expansion amount is used to represent the length change amount of the flexible section when it is stretched from the bent state to the tensioned state under the action of tides and / or waves.

[0015] Based on the total length of the flexible sections, the allowable expansion amount of the flexible sections, and the number of flexible sections spaced from the fixed section, determine the length of each flexible section.

[0016] According to a design method of a suspended cable for tidal power generation provided by the present invention, determining the number of flexible sections and the allowable expansion amount of each flexible section based on the length of the fixed section, the maximum tidal range, and the maximum wave height, and determining the thickness of the foaming layer and the flexibility of the armor layer based on the allowable expansion amount of each flexible section includes:

[0017] Based on the maximum tidal range and the maximum wave height, determine the total allowable expansion amount of all flexible sections;

[0018] Determine the initial number of flexible sections, and obtain the initial allowable expansion amount of each flexible section based on the initial number of flexible sections; set the thickness of the foaming layer and the flexibility of the armor layer based on the initial allowable expansion amount of each flexible section, and determine whether the thickness of the foaming layer and the flexibility of the armor layer meet the preset material conditions; in the case where the thickness of the foaming layer and the flexibility of the armor layer do not meet the preset material conditions, adjust the number of flexible sections and loop this step until the thickness of the foaming layer and the flexibility of the armor layer meet the preset material conditions, and obtain the number of flexible sections, the allowable expansion amount of each flexible section, the thickness of the foaming layer, and the flexibility of the armor layer.

[0019] According to a design method of a suspended cable for tidal power generation provided by the present invention, determining the second parameter of the cable based on the water level data and the first parameter includes:

[0020] Based on the first parameter, determine the weight and initial buoyancy of the cable;

[0021] Based on the weight and initial buoyancy of the cable, determine the notch buoyancy of the cable;

[0022] Based on the water level data, verify the cable configuration of the flexible segments with different numbers and different arrangements of test buoyancy blocks and test counterweights under different tidal and wave conditions through finite element simulation; the sum of the net buoyancies of the test buoyancy blocks and test counterweights is the notch buoyancy;

[0023] Based on the cable configuration verified by finite element simulation, determine the maximum bending curvature of each flexible segment;

[0024] In the case where the bending curvature is less than the preset curvature value, determine the number and arrangement of the corresponding test buoyancy blocks and test counterweights as the second parameter of the cable.

[0025] According to a suspension cable design method for tidal power generation provided by the present invention, the method for verifying the cable configuration of the flexible segments with different numbers and different arrangements of test buoyancy blocks and test counterweights under different tidal and wave conditions based on the water level data includes:

[0026] Based on the tide height data and wave height data in the water level data, determine the water depth change curve data;

[0027] Use the water depth change curve data as the boundary condition as the input of the finite element simulation verification, simulate the impact force and drag force under different tidal and wave conditions, and obtain the cable configuration.

[0028] According to a suspension cable design method for tidal power generation provided by the present invention, the method for determining the maximum bending curvature of each flexible segment based on the cable configuration verified by finite element simulation includes:

[0029] Based on the cable configuration verified by finite element simulation, output the displacement, velocity and curvature distribution of the sampling nodes in the current configuration, and draw a dynamic deformation nephogram;

[0030] Based on the dynamic deformation nephogram, determine the maximum bending curvature of each flexible segment.

[0031] The present invention also provides a suspension cable design device for tidal power generation, including:

[0032] A first data determination module, configured to determine the historical tidal data and historical wave data of the deployment location based on the deployment location of the tidal power generation device;

[0033] A second data determination module, configured to determine the water level data of the deployment location based on the historical tide data and the historical wave data; the water level data includes seabed depth data, tide height data, and wave height data;

[0034] A first processing module, configured to determine a first parameter of the cable based on the water level data; the first parameter includes the length of the fixed section, the number of flexible sections, the length of each flexible section, and the thickness of the foam layer and the flexibility of the armor layer;

[0035] A second processing module, configured to determine a second parameter of the cable based on the water level data and the first parameter, where the second parameter includes the number and arrangement of buoyancy blocks and counterweight blocks on the flexible section.

[0036] The present invention further provides a cable, including a core wire, a foam layer, and an armor layer arranged from the inside out. The cable further includes two fixed sections directly connected to a tidal power generation device or an energy storage device, and flexible sections suspended in water for power transmission. The flexible sections are connected between the two fixed sections; at least one part of the cable is designed by using the suspension cable design method for tidal power generation purposes as described in any one of the above.

[0037] The present invention further provides a tidal power generation system, including a tidal power generation device and a cable designed by using the suspension cable design method for tidal power generation purposes as described in any one of the above.

[0038] The present invention further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the suspension cable design method for tidal power generation purposes as described in any one of the above.

[0039] The present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the suspension cable design method for tidal power generation purposes as described in any one of the above.

[0040] The present invention further provides a computer program product, including a computer program. When the computer program is executed by a processor, it implements the suspension cable design method for tidal power generation purposes as described in any one of the above.

[0041] The design method, device and cable of the suspension cable for tidal power generation provided by the present invention can effectively solve the adaptability problem of the suspension cable in a tidal power station in a complex marine environment through the detailed design and parameter determination of the above steps, make the cable structure adapt to tides and waves, reduce the forces on the cable under the action of tides and waves, improve the mechanical stability of the cable, ensure the service life of the cable, and thus provide a reliable power transmission guarantee for the stable operation of the tidal power generation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0043] Figure 1 is one of the flow diagrams of the design method of the suspension cable for tidal power generation provided by the present invention;

[0044] Figure 2 is the second flow diagram of the design method of the suspension cable for tidal power generation provided by the present invention;

[0045] Figure 3 is the structural diagram of the design device of the suspension cable for tidal power generation provided by the present invention;

[0046] Figure 4 is the structural diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present invention belong to the scope of protection of the present invention.

[0048] The following will describe Figures 1-4 the design method, device and cable of the suspension cable for tidal power generation of the present invention.

[0049] Before describing the design method of the suspension cable for tidal power generation use according to the embodiments of the present invention, the cable according to the embodiments of the present invention will be described first. The cable includes a core wire, a foamed layer, and an armor layer arranged from the inside out. It is characterized in that the cable includes two fixed segments directly connected to the tidal power generation device or the energy storage device and a flexible segment suspended in water for power transmission, and the flexible segment is connected between the two fixed segments.

[0050] The core wire is the conductive part of the cable and is responsible for transmitting electric energy. The core wire is usually made of a highly conductive metal material, such as copper or aluminum, to ensure the efficiency and stability of power transmission.

[0051] The foamed layer is located outside the core wire, and its main function is to provide insulation and protection. The foamed material has a low density and good flexibility, which can reduce the weight of the cable while ensuring the insulation performance, making it more suitable for suspension in water.

[0052] The armor layer is the outer layer of the cable and is used to protect the cable from mechanical damage and environmental impact. The armor layer is usually made of aramid fiber or steel wire, which has high strength and corrosion resistance and can withstand the impact of tidal currents and waves.

[0053] The fixed segments are directly connected to the tidal power generation device or the energy storage device and are responsible for outputting electric energy from the power generation device or inputting it into the energy storage device or the power grid. The length of the fixed segments is determined according to the deployment position of the tidal power generation device and the water level data to ensure the stability and transmission efficiency of the cable.

[0054] The flexible segment is suspended in water for power transmission. The flexible segment is connected between the two fixed segments and can adapt to the changes in tidal currents, reducing the mechanical stress on the cable. The number and length of the flexible segments can be determined according to the water level data and the mechanical stability requirements of the cable to ensure the stability and reliability of the cable during the operation of the tidal power generation device.

[0055] The cables of tidal power stations need to operate in a harsh marine environment for a long time, so they must have good waterproof, moisture-proof, and corrosion-resistant properties. The design of the foamed layer and the armor layer can effectively protect the cable from seawater erosion and extend the service life of the cable.

[0056] In addition, the cables of tidal power stations need to withstand the impact of tidal currents and waves, so they must have sufficient mechanical strength and flexibility. The design of the armor layer can enhance the tensile and bending resistance of the cable, making it stable in a complex marine environment.

[0057] Through the above design, the cable according to the embodiments of the present invention can meet the special requirements of tidal power generation use and ensure stable operation and efficient power transmission in a complex marine environment.

[0058] The following describes the design method of a suspended cable for tidal power generation applications in the embodiments of the present invention. As Figure 1 shown, the design method of a suspended cable for tidal power generation applications in the embodiments of the present invention mainly includes step 110, step 120, step 130, and step 140.

[0059] Step 110: Based on the deployment location of the tidal power generation device, determine the historical tidal data and historical wave data at the deployment location.

[0060] First, it is necessary to collect and analyze the historical tidal data and historical wave data at the deployment location of the tidal power generation device. These data may include information such as the ebb and flow patterns of the tides, changes in tidal height, wave frequency, and wave height over a certain period of time in the past.

[0061] It can be understood that by understanding the historical tidal and wave data, a basic basis can be provided for determining subsequent water level data. These data help analyze the characteristics of the marine dynamic environment in the sea area where the tidal power generation device is located, thereby providing important environmental parameters for the cable design.

[0062] For example, the tidal range can be determined based on the historical tidal data, and the impact of waves on the cable can be evaluated based on the historical wave data, so as to consider corresponding performance and protection measures when designing the cable.

[0063] Step 120: Based on the historical tidal data and historical wave data, determine the water level data at the deployment location.

[0064] The water level data includes seabed depth data, tidal height data, and wave height data.

[0065] Based on the collected historical tidal data and historical wave data, the water level data at the deployment location can be further determined. The water level data includes seabed depth data, tidal height data, and wave height data, etc. The seabed depth data can be obtained through marine topographic surveying, while the tidal height data and wave height data can be obtained through the analysis and calculation of historical tidal data and historical wave data.

[0066] The seabed depth data determines the laying length and fixing method of the cable. The tidal height data affects the suspended height and floating range of the cable; the wave height data is related to the dynamic elongation, load, and impact force of the cable.

[0067] In this embodiment, by accurately determining these water level data, it can be ensured that the cable can stably float in the water during the operation of the tidal power generation device, while avoiding damage due to water level changes.

[0068] Step 130: Based on the water level data, determine the first parameter of the cable.

[0069] The first parameter includes the length of the fixed section, the number of flexible sections, the length of each flexible section, the thickness of the foaming layer, and the flexibility of the armor layer.

[0070] The length of the fixed section, the number and length of the flexible sections determine the overall structure and layout of the cable. The thickness of the foaming layer also affects the buoyancy and flexibility of the cable, while the flexibility of the armor layer is related to the tensile strength and bending resistance of the cable. For example, longer flexible sections can better adapt to the changes in tidal currents, and a thicker foaming layer can provide greater buoyancy to keep the cable stably suspended in water.

[0071] Step 140: Determine the second parameter of the cable based on the water level data and the first parameter.

[0072] The second parameter includes the number and arrangement of buoyancy blocks and counterweight blocks on the flexible sections.

[0073] The buoyancy blocks and counterweight blocks are set to adjust the buoyancy distribution of the cable to keep it balanced and stable in water. By reasonably determining the number and arrangement of the buoyancy blocks and counterweight blocks, it can be ensured that the cable will not be subjected to strong pulling and dragging forces due to uneven buoyancy during the operation of the tidal power generation device.

[0074] For example, installing buoyancy blocks at specific positions on the flexible section can increase the buoyancy in that area to better adapt to the changes in tidal currents; while setting counterweight blocks at certain parts of the cable can reduce its buoyancy to keep it at an appropriate depth.

[0075] According to the design method of the suspended cable for tidal power generation provided by the embodiments of the present invention, through the detailed design and parameter determination of the above steps, the adaptability problem of the suspended cable in a complex marine environment in a tidal power station can be effectively solved, enabling the cable structure to adapt to tides and waves, reducing the forces on the cable under the action of tides and waves, improving the mechanical stability of the cable, ensuring the service life of the cable, and thus providing a reliable power transmission guarantee for the stable operation of the tidal power generation device.

[0076] In some embodiments, based on the water level data, determining the first parameter of the cable includes step 210, step 210, step 230, and step 240.

[0077] Step 210: Based on the water level data, determine the static water depth data of the deployment location.

[0078] Step 220: Based on the static water depth data, determine the length of the fixed section.

[0079] Step 230: Based on the length of the fixed section, the maximum tidal range, and the maximum wave height, determine the number of flexible sections and the allowable expansion / contraction amount for each flexible section. Then, based on the allowable expansion / contraction amount for each flexible section, determine the thickness of the foaming layer and the flexibility of the armor layer.

[0080] The allowable expansion / contraction amount is used to represent the change in length of the flexible section when it is stretched from a bent state to a taut state under the action of tides and / or waves.

[0081] Step 240: Based on the total length of the flexible sections, the allowable expansion / contraction amount of the flexible sections, and the number of flexible sections spaced from the fixed section, determine the length of each flexible section.

[0082] The purpose of Step 210 is to determine the static water depth data at the deployment location of the tidal power generation device, that is, the water depth without the influence of tides and waves. The static water depth data is the basis for subsequent determination of the length of the cable fixed section.

[0083] The measured data can be processed and analyzed to determine the average water depth and the maximum water depth at the deployment location, which can then be used for subsequent cable design.

[0084] The fixed section is the part directly connected to the tidal power generation device or the energy storage device, and its length needs to be determined based on the static water depth data. The length of the fixed section should ensure that the cable can be stably connected to the power generation device and the energy storage device, while taking into account the influence of tides and waves.

[0085] The length of the fixed section can be calculated based on the static water depth data, combined with the installation positions of the tidal power generation device and the energy storage device. The length of the fixed section can be greater than the static water depth to ensure that the cable will not be overstretched or compressed under the action of tides and waves.

[0086] To ensure the safety and reliability of the cable, a safety factor may be introduced. For example, if the static water depth is 50 meters and the safety factor is 1.2, the length of the fixed section should be 60 meters.

[0087] The flexible section is the part connecting two fixed sections and needs to adapt to the water level changes caused by tides and waves. The allowable expansion / contraction amount represents the change in length of the flexible section when it is stretched from a bent state to a taut state under the action of tides and / or waves. The thickness of the foaming layer and the flexibility of the armor layer need to be determined based on the allowable expansion / contraction amount to ensure that the flexible section can work properly during water level changes.

[0088] In some implementation manners, the number of flexible sections is calculated based on the length of the fixed section, the maximum tidal range, and the maximum wave height. For example, if the length of the fixed section is 60 meters, the maximum tidal range is 5 meters, and the maximum wave height is 3 meters, the number of flexible sections can be calculated based on these data.

[0089] The allowable expansion and contraction amount should be greater than the sum of the maximum tidal range and the maximum wave height to ensure that the flexible section will not be overstretched or compressed when the water level changes. For example, if the maximum tidal range is 5 meters and the maximum wave height is 3 meters, the allowable expansion and contraction amount should be greater than 8 meters.

[0090] Furthermore, the appropriate thickness of the foam layer can be selected according to the allowable expansion and contraction amount. The thickness of the foam layer should be large enough to provide sufficient buoyancy and flexibility.

[0091] According to the allowable expansion and contraction amount, select the appropriate material and structure of the armor layer. The flexibility of the armor layer should be high enough to adapt to the expansion and contraction of the flexible section. For example, high-flexibility aramid fibers or steel wire armor can be used.

[0092] The purpose of step 240 is to determine the specific length of each flexible section. The total length of the flexible sections is the sum of the lengths of all flexible sections, and the length of each flexible section needs to be determined according to the allowable expansion and contraction amount and the distance of the flexible section from the fixed section, that is, the number of intervening flexible sections.

[0093] When the flexible section is closer to the fixed section, that is, the number of intervening flexible sections is smaller, the length of the flexible section can be shorter, and vice versa. Because the fixed end of the fixed section has a good fixing effect, it can thus have a good constraining effect on the flexible sections within a certain adjacent range. Setting the flexible section close to the fixed section to be shorter can improve flexibility and ensure the constraining effect.

[0094] Through the above detailed design and parameter determination, the adaptability problem of the suspended cable in a tidal power station in a complex marine environment can be effectively solved, improving the mechanical stability and power transmission efficiency of the cable, thereby providing a reliable power transmission guarantee for the stable operation of the tidal power generation device.

[0095] In some embodiments, based on the length of the fixed section, the maximum tidal range, and the maximum wave height, determine the number of flexible sections and the allowable expansion and contraction amount of each flexible section, and based on the allowable expansion and contraction amount of each flexible section, determine the thickness of the foam layer and the flexibility of the armor layer, including: determining the total allowable expansion and contraction amount of all flexible sections based on the maximum tidal range and the maximum wave height; determining the initial number of flexible sections, and obtaining the initial allowable expansion and contraction amount of each flexible section based on the initial number of flexible sections; setting the thickness of the foam layer and the flexibility of the armor layer based on the initial allowable expansion and contraction amount of each flexible section, and determining whether the thickness of the foam layer and the flexibility of the armor layer meet the preset material conditions; in the case where the thickness of the foam layer and the flexibility of the armor layer do not meet the preset material conditions, adjust the number of flexible sections and loop this step until the thickness of the foam layer and the flexibility of the armor layer meet the preset material conditions, obtaining the number of flexible sections, the allowable expansion and contraction amount of each flexible section, the thickness of the foam layer, and the flexibility of the armor layer.

[0096] It is understandable that the maximum tidal range refers to the maximum height difference between high and low tides. The maximum wave height refers to the maximum height of ocean waves.

[0097] When calculating the total allowable expansion and contraction amount, the sum of the maximum tidal range and the maximum wave height needs to be considered. For example, if the maximum tidal range is 5 meters and the maximum wave height is 3 meters, the total allowable expansion and contraction amount should be greater than 8 meters to ensure that the flexible section will not be overstretched or compressed under extreme conditions.

[0098] Based on engineering experience and design requirements, the initial number of flexible sections can be preliminarily determined. This initial number is a process value, not the final value.

[0099] In this case, the total allowable expansion and contraction amount can be distributed to each flexible section according to the length of each flexible section to obtain the initial allowable expansion and contraction amount for each flexible section.

[0100] The thickness of the foaming layer can be determined according to the allowable expansion and contraction amount of the flexible section to ensure that the foaming layer will not rupture or fail during the expansion and contraction process. The flexibility of the armor layer needs to be determined according to the allowable expansion and contraction amount of the flexible section to ensure that the armor layer will not break or lose its protective function during the expansion and contraction process.

[0101] The preset material conditions refer to the material property requirements of the foaming layer and the armor layer, such as mechanical properties like strength and bending resistance. Flexibility is a physical quantity that describes the ability of a material or object to deform under external forces without being damaged. It is used to measure the softness and bendability of a material. Materials with high flexibility can undergo large deformations without breaking or being damaged when subjected to external forces such as bending, stretching, or compression. Flexibility can be specifically designed and measured by comprehensive indicators based on strength and bending resistance.

[0102] Based on this, it can be checked whether the selected materials meet the preset material conditions. If the thickness of the foaming layer and the flexibility of the armor layer do not meet the preset conditions, the number of flexible sections needs to be adjusted.

[0103] In the case where the thickness of the foaming layer and the flexibility of the armor layer do not meet the preset material conditions, adjust the number of flexible sections and repeat this step until the thickness of the foaming layer and the flexibility of the armor layer meet the preset material conditions. If the initially selected thickness of the foaming layer and the flexibility of the armor layer do not meet the preset conditions, it means that the current number of flexible sections and the allowable expansion and contraction amount are unreasonable, and the number of flexible sections needs to be adjusted. By increasing or decreasing the number of flexible sections and recalculating the allowable expansion and contraction amount for each flexible section, a solution that meets the preset material conditions can be found.

[0104] Assume that the initially selected thickness of the foaming layer is 5 mm and the flexibility of the armored layer does not meet the preset conditions. The number of flexible segments can be increased. For example, if the number of flexible segments is increased from 4 to 6, the allowable expansion and contraction amount of each flexible segment becomes 1.33 m (8 m / 6). Re-select the thickness of the foaming layer and the material of the armored layer, and check whether the preset conditions are met. If it still does not meet the requirements, continue to adjust the number of flexible segments until a solution that meets the conditions is found. Through the above steps, the number of flexible segments, the allowable expansion and contraction amount of each flexible segment, the thickness of the foaming layer, and the flexibility of the armored layer can be gradually determined, ensuring the mechanical stability and reliability of the cable under the action of tides and waves, while meeting the requirements of material properties.

[0105] In some embodiments, based on the water level data and the first parameter, determining the second parameter of the cable includes the following process.

[0106] First, based on the first parameter, determine the weight and initial buoyancy of the cable.

[0107] According to the material density, volume of the cable, and the weights of each part such as the armored layer and the foaming layer, calculate the total weight of the cable. Parameters such as the length, diameter of the cable, and the density of the material also need to be considered.

[0108] The initial buoyancy refers to the buoyancy force that the cable receives in water. According to Archimedes' principle, the magnitude of the buoyancy force is equal to the weight of the liquid displaced by the cable. The initial buoyancy can be determined by calculating the volume of the cable and the density of seawater.

[0109] On this basis, based on the weight of the cable and the initial buoyancy, determine the notch buoyancy of the cable.

[0110] The notch buoyancy refers to the buoyancy force that the cable lacks in water, that is, the difference between the weight of the cable and the initial buoyancy. If the weight of the cable is greater than the initial buoyancy, the notch buoyancy is positive, indicating that the cable needs additional buoyancy to remain suspended; if the weight of the cable is less than the initial buoyancy, the notch buoyancy is negative, indicating that the cable needs additional weight to remain stable.

[0111] Furthermore, based on the water level data, verify the cable shape of the flexible segments configured with different numbers and different arrangements of test buoyancy blocks and test counterweight blocks under different tidal and wave conditions through finite element simulation; the sum of the net buoyancy of the test buoyancy blocks and the test counterweight blocks is the notch buoyancy.

[0112] Finite element analysis (FEA) is a numerical calculation method used to predict the physical behavior of complex geometric structures under different conditions. By discretizing the continuum into a finite number of simple elements, the shape changes of the cable under different tidal and wave conditions can be simulated.

[0113] In finite element simulation, different numbers and arrangements of test buoyancy blocks and test counterweight blocks can be configured to simulate the buoyancy and weight distribution of the cable in actual situations. The sum of the net buoyancies of the test buoyancy blocks and the test counterweight blocks should be equal to the notch buoyancy.

[0114] Specifically, through finite element simulation software (such as ANSYS, ABAQUS, etc.), the morphological changes of the cable under different tidal and wave conditions can be simulated, and the behaviors of the cable such as bending and stretching can be observed to verify the feasibility and effects of different configuration schemes.

[0115] Furthermore, based on the cable morphology verified by finite element simulation, the maximum bending curvature of each flexible section is determined. The maximum bending curvature refers to the maximum bending degree of each flexible section of the cable during the simulation, which is represented by the reciprocal of the curvature radius. The smaller the curvature radius, the larger the curvature, indicating a higher bending degree of the cable. Through the finite element simulation results, the bending curvatures of each flexible section under different tidal and wave conditions can be obtained. The maximum value among them can be selected as the maximum bending curvature of the flexible section.

[0116] When the bending curvature is less than the preset curvature value, the numbers and arrangements of the corresponding test buoyancy blocks and test counterweight blocks are determined as the second parameter of the cable.

[0117] The preset curvature value is a threshold preset according to the design requirements and material properties of the cable, which is used to judge whether the bending degree of the cable is within an acceptable range. If the maximum bending curvature is less than the preset curvature value, it means that the bending degree of the cable is within the safe range and will not have an adverse impact on the performance and lifespan of the cable.

[0118] If the simulation results show that the maximum bending curvature is less than the preset curvature value, then the numbers and arrangements of the corresponding test buoyancy blocks and test counterweight blocks can be determined as the second parameter of the cable. The second parameter is used to guide the design and manufacture of the actual cable to ensure that the cable can maintain good morphology and performance under different tidal and wave conditions.

[0119] In this implementation, based on the water level data and the first parameter, the second parameter of the cable can be determined, thereby optimizing the design of the cable and improving its adaptability and reliability in complex marine environments.

[0120] In some implementations, based on the water level data, the cable morphology of the flexible sections configured with different numbers and different arrangements of test buoyancy blocks and test counterweight blocks under different tidal and wave conditions is verified by finite element simulation, including: based on the tide height data and the wave height data in the water level data, the water depth change curve data is determined; the water depth change curve data is used as the boundary condition as the input of the finite element simulation verification to simulate the impact force and drag force under different tidal and wave conditions, and the cable morphology is obtained.

[0121] First, it is necessary to collect the tide height data and wave height data at the deployment location of the tidal power generation device. Analyze the collected tide height data and wave height data to determine the variation law of the water level. For example, the period of the tide, the tidal range, the flood and ebb times, etc., as well as the frequency, wave height, wavelength, etc. of the waves can be calculated.

[0122] According to the variation law of the water level, generate the water depth variation curve data. The water depth variation curve represents the water depth values at different time points and can be used to simulate the influence of tides and waves on the cable.

[0123] The following takes the water depth variation curve data as the boundary condition and inputs it into the finite element simulation verification software as an example for detailed description.

[0124] A geometric model of the cable can be established in the finite element simulation software, including the core wire, foaming layer, armor layer, etc. The model should reflect the structure and material properties of the cable as realistically as possible. Set the material properties for each part of the cable model, such as density, elastic modulus, Poisson's ratio, etc. These properties will affect the mechanical behavior of the cable in the simulation.

[0125] Apply the water depth variation curve data as the boundary condition to the cable model. The boundary conditions include the variation of the water depth, the impact force and drag force of tides and waves, etc. These conditions will simulate the force-bearing situation of the cable in the actual marine environment.

[0126] Different load conditions can be defined according to the characteristics of tides and waves. For example, different load conditions such as different tide heights, different wave heights, different wave directions, etc. can be set to comprehensively evaluate the performance of the cable under various conditions.

[0127] On this basis, run the finite element simulation to calculate the mechanical response of the cable under different load conditions. The simulation results will include information such as the displacement, stress, and strain of the cable, which can be used to evaluate the morphological changes of the cable.

[0128] Analyze the simulation results and extract the morphological data of the cable under different tide and wave conditions. For example, the displacement nephogram and stress nephogram of the cable can be drawn to visually observe the deformation of the cable.

[0129] Specifically, based on the cable morphology under the finite element simulation verification, determine the maximum bending curvature of each flexible section, including: based on the cable morphology under the finite element simulation verification, output the displacement, velocity, and curvature distribution of the sampling nodes in the current morphology, and draw the dynamic deformation nephogram; based on the dynamic deformation nephogram, determine the maximum bending curvature of each flexible section.

[0130] In this embodiment, key points in the cable model are selected as sampling nodes, and the displacement, velocity, and curvature data of these nodes are recorded. The data of the sampling nodes are visualized to generate a dynamic deformation cloud map. The cloud map can show the morphological changes of the cable at different time points.

[0131] Evaluate the maximum bending curvature of each flexible section to determine whether it is within an acceptable range. If the bending curvature is too large, it may cause the cable to exhibit the lantern effect, which may lead to damage or performance degradation.

[0132] According to the design requirements and material properties of the cable, a preset curvature value is set. The preset curvature value is the criterion for judging whether the bending degree of the cable is safe. Compare the maximum bending curvature of each flexible section with the preset curvature value. If the bending curvature is less than the preset curvature value, it indicates that the bending degree of the cable is within the safe range.

[0133] If the bending curvature meets the requirements, determine the quantity and arrangement of the corresponding test buoyancy blocks and test counterweight blocks as the second parameters of the cable. These parameters will be used to guide the design and manufacture of the actual cable.

[0134] In this implementation, based on the water level data and finite element simulation verification, the second parameters of the cable can be determined, thereby optimizing the design of the cable and improving its adaptability and reliability in complex marine environments.

[0135] The suspension cable design device for tidal power generation provided by the present invention will be described below. The suspension cable design device for tidal power generation described below can be mutually referred to in correspondence with the suspension cable design method for tidal power generation described above.

[0136] As Figure 3 shown, the suspension cable design device for tidal power generation according to the embodiment of the present invention mainly includes a first data determination module 310, a second data determination module 320, a first processing module 330, and a second processing module 340.

[0137] The first data determination module 310 is used to determine the historical tidal data and historical wave data of the deployment location based on the deployment location of the tidal power generation device;

[0138] The second data determination module 320 is used to determine the water level data of the deployment location based on the historical tidal data and historical wave data; the water level data includes seabed depth data, tide height data, and wave height data;

[0139] The first processing module 330 is used to determine the first parameters of the cable based on the water level data; the first parameters include the length of the fixed section, the number of flexible sections, the length of each flexible section, and the thickness of the foaming layer and the flexibility of the armor layer;

[0140] The second processing module 340 is configured to determine a second parameter of the cable based on the water level data and the first parameter, where the second parameter includes the number and arrangement of the buoyancy blocks and counterweight blocks on the flexible section.

[0141] According to the floating cable design device for tidal power generation applications provided by the embodiments of the present invention, through the detailed design and parameter determination of the above steps, the adaptability problem of the floating cable in a complex marine environment in a tidal power station can be effectively solved, enabling the cable structure to adapt to tides and sea waves, reducing the forces acting on the cable under the action of tides and sea waves, improving the mechanical stability of the cable, ensuring the service life of the cable, and thus providing a reliable power transmission guarantee for the stable operation of the tidal power generation device.

[0142] The cable provided by the embodiments of the present invention will be described below. The cable includes a core wire, a foaming layer, and an armor layer arranged from the inside out. The cable further includes two fixed sections directly connected to the tidal power generation device or the energy storage device and a flexible section suspended in water for power transmission, and the flexible section is connected between the two fixed sections; at least one part of the cable is designed by using the floating cable design method for tidal power generation applications as described above.

[0143] The tidal power generation system provided by the embodiments of the present invention will be described below. The tidal power generation system includes a tidal power generation device and a cable designed by using the floating cable design method for tidal power generation applications as described above.

[0144] Figure 4 An example of the physical structure diagram of an electronic device is shown as Figure 4 shown. The electronic device may include: a processor 410, a communication interface 420, a memory 430, and a communication bus 440. Among them, the processor 410, the communication interface 420, and the memory 430 communicate with each other through the communication bus 440. The processor 410 can call the logical instructions in the memory 430 to execute the floating cable design method for tidal power generation applications. The method includes: determining the historical tidal data and historical wave data of the deployment location based on the deployment location of the tidal power generation device; determining the water level data of the deployment location based on the historical tidal data and historical wave data; the water level data includes the seabed depth data, the tide height data, and the wave height data; determining the first parameter of the cable based on the water level data; the first parameter includes the length of the fixed section, the number of flexible sections, the length of each flexible section, and the thickness of the foaming layer and the flexibility of the armor layer; determining the second parameter of the cable based on the water level data and the first parameter, where the second parameter includes the number and arrangement of the buoyancy blocks and counterweight blocks on the flexible section.

[0145] In addition, when the logical instructions in the above-mentioned memory 430 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0146] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the suspension cable design method for tidal power generation purposes provided by the above-mentioned various methods. The method includes: based on the deployment location of the tidal power generation device, determining the historical tidal data and historical wave data of the deployment location; based on the historical tidal data and historical wave data, determining the water level data of the deployment location; the water level data includes seabed depth data, tidal height data, and wave height data; based on the water level data, determining the first parameters of the cable; the first parameters include the length of the fixed section, the number of flexible sections, the length of each flexible section, the thickness of the foaming layer, and the flexibility of the armor layer; based on the water level data and the first parameters, determining the second parameters of the cable, and the second parameters include the number and arrangement of buoyancy blocks and counterweight blocks on the flexible sections.

[0147] On another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it realizes the suspension cable design method for tidal power generation purposes provided by the above-mentioned various methods. The method includes: based on the deployment location of the tidal power generation device, determining the historical tidal data and historical wave data of the deployment location; based on the historical tidal data and historical wave data, determining the water level data of the deployment location; the water level data includes seabed depth data, tidal height data, and wave height data; based on the water level data, determining the first parameters of the cable; the first parameters include the length of the fixed section, the number of flexible sections, the length of each flexible section, the thickness of the foaming layer, and the flexibility of the armor layer; based on the water level data and the first parameters, determining the second parameters of the cable, and the second parameters include the number and arrangement of buoyancy blocks and counterweight blocks on the flexible sections.

[0148] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative labor.

[0149] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for designing a suspended cable for tidal power generation, wherein the cable comprises a core wire, a foaming layer and an armor layer arranged from the inside to the outside, characterized in that: The cable comprises two fixed sections directly connected to a tidal power generation device or an energy storage device and a flexible section suspended in water for power transmission, wherein the flexible section is connected between the two fixed sections; the method comprises: Based on the deployment location of the tidal power generation device, determine the historical tidal data and historical wave data of the deployment location; Determining water level data of the deployment location based on the historical tide data and the historical wave data; the water level data includes seabed depth data, tide height data and wave height data; Based on the water level data, determining a first parameter of the cable; the first parameter includes the length of the fixed section, the number of the flexible sections, the length of each flexible section, the thickness of the foaming layer, and the flexibility of the armor layer; Based on the water level data and the first parameter, determining a second parameter of the cable, the second parameter including the number and arrangement of buoyancy blocks and counterweight blocks on the flexible section; The step of determining a first parameter of the cable based on the water level data comprises: Determining static water depth data of the deployment location based on the water level data; Determining the length of the fixed section based on the static water depth data; Based on the length of the fixed section, the maximum tidal range and the maximum wave height, the number of flexible sections and the allowable expansion and contraction amount of each flexible section are determined, and based on the allowable expansion and contraction amount of each flexible section, the thickness of the foaming layer and the flexibility of the armor layer are determined; the allowable expansion and contraction amount is used to represent the length change of the flexible section from a bent state to a tensioned state under the action of tides and / or waves; The length of each flexible segment is determined based on the total length of the flexible segment, the allowable expansion and contraction amount of the flexible segment, and the number of flexible segments spaced apart from the fixed segment.

2. The method for designing a suspended cable for tidal power generation according to claim 1, characterized in that: The method of determining the number of flexible segments and the allowable expansion and contraction amount of each flexible segment based on the length of the fixed segment, the maximum tidal range, and the maximum wave height, and determining the thickness of the foaming layer and the flexibility of the armor layer based on the allowable expansion and contraction amount of each flexible segment includes: Based on the maximum tidal range and the maximum wave height, determining a total allowable expansion and contraction amount of all flexible segments; Determine the initial number of flexible segments, and obtain the initial allowable expansion and contraction amount of each flexible segment based on the initial number of flexible segments; set the thickness of the foaming layer and the flexibility of the armor layer based on the initial allowable expansion and contraction amount of each flexible segment, and determine whether the thickness of the foaming layer and the flexibility of the armor layer meet the preset material conditions; if the thickness of the foaming layer and the flexibility of the armor layer do not meet the preset material conditions, adjust the number of flexible segments and repeat the steps until the thickness of the foaming layer and the flexibility of the armor layer meet the preset material conditions, and obtain the number of flexible segments, the allowable expansion and contraction amount of each flexible segment, the thickness of the foaming layer and the flexibility of the armor layer.

3. The method for designing a suspended cable for tidal power generation according to claim 1, characterized in that: The determining the second parameter of the cable based on the water level data and the first parameter comprises: Based on the first parameter, determining the weight and initial buoyancy of the cable; Determining the notch buoyancy of the cable based on the weight and initial buoyancy of the cable; Based on the water level data, the cable morphology of the flexible section equipped with different numbers and arrangements of test buoyancy blocks and test counterweight blocks under different tidal and wave conditions is verified by finite element simulation; the sum of the net buoyancy of the test buoyancy block and the test counterweight block is the notch buoyancy; The maximum bending curvature of each flexible segment is determined based on the cable morphology verified by finite element simulation; When the bending curvature is less than a preset curvature value, the number and arrangement of the corresponding test buoyancy blocks and test weight blocks are determined as the second parameter of the cable.

4. The method for designing a suspended cable for tidal power generation according to claim 3 is characterized in that: Based on the water level data, the cable morphology of the flexible section configured with different numbers and arrangements of test buoyancy blocks and test weight blocks under different tidal and wave conditions is verified by finite element simulation, including: Determining water depth variation curve data based on tide height data and wave height data in the water level data; The water depth variation curve data is used as boundary conditions and as input for finite element simulation verification to simulate the impact force and drag force under different tide and wave conditions to obtain the cable shape.

5. The method for designing a suspended cable for tidal power generation according to claim 3 is characterized in that: The method of determining the maximum bending curvature of each flexible segment based on the cable morphology under finite element simulation verification includes: Based on the finite element simulation to verify the cable shape, output the displacement, velocity and curvature distribution of the sampling nodes in the current shape, and draw a dynamic deformation cloud map; Based on the dynamic deformation cloud diagram, the maximum bending curvature of each flexible segment is determined.

6. A suspension cable design device for tidal power generation, characterized in that: The device for designing a suspended cable for tidal power generation uses the method for designing a suspended cable for tidal power generation as claimed in any one of claims 1 to 5 to obtain the parameters of the cable, and the device includes: A first data determination module, used to determine historical tidal data and historical wave data of the deployment location based on the deployment location of the tidal power generation device; A second data determination module is used to determine water level data of the deployment location based on the historical tide data and the historical wave data; the water level data includes seabed depth data, tide height data and wave height data; A first processing module, for determining a first parameter of the cable based on the water level data; the first parameter includes the length of the fixed section, the number of flexible sections, the length of each flexible section, the thickness of the foaming layer, and the flexibility of the armor layer; The second processing module is used to determine a second parameter of the cable based on the water level data and the first parameter, wherein the second parameter includes the number and arrangement of the buoyancy blocks and the counterweight blocks on the flexible section.

7. A cable, characterized in that: The cable comprises a core wire, a foaming layer and an armor layer arranged from the inside to the outside, and the cable also comprises two fixed sections directly connected to a tidal power generation device or an energy storage device and a flexible section suspended in water for power transmission, wherein the flexible section is connected between the two fixed sections; at least one part of the cable is designed by adopting a design method for a suspended cable for tidal power generation as claimed in any one of claims 1 to 5.

8. A tidal power generation system, characterized in that: It comprises a tidal power generation device and a cable designed by using the method for designing a suspended cable for tidal power generation as claimed in any one of claims 1 to 5.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, characterized in that: When the processor executes the program, the method for designing a suspended cable for tidal power generation as claimed in any one of claims 1 to 5 is implemented.

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