Floater mass adjusting method and device of floating type wind wave energy power generation system, medium and equipment

Abstract

The invention relates to the technical field of wind wave power generation, in particular to a floater mass adjusting method of a floating type wind wave energy power generation system. Establishing a wind wave flow coupling numerical model; judging the current working condition state of the floater according to the collected working condition data; when the working condition is the general working condition, the optimal floater mass of each floater in the mooring system under the general working condition is determined, and mass adjustment is independently carried out on each floater, and when the working condition is the extreme working condition, linkage mass adjustment is carried out on the floaters according to the working condition data, so that the optimal mass of each floater under the extreme working condition is determined. In general working conditions, the output power of the wave energy converter is improved, and the impact of impact load caused by water outlet and water inlet is solved. And under extreme working conditions, the quality of the floater is adjusted by comprehensively considering the output power and the survival pressure of the mooring system.

Description

Technical Field

[0001] The present invention relates to the technical field of wind wave power generation, and in particular to a float mass adjustment method, device, medium and device for a floating wind wave energy power generation system. Background Art

[0002] As one of the solutions to improve the utilization rate of offshore renewable energy and reduce the cost of offshore wind power, the wind and wave energy integration system has attracted widespread attention. At present, there are few optimization studies on wave energy converters in wind and wave energy integration systems, and the output power of the system has been limited. In addition to improving the output power of the system, extending the service life of the system is also an important part of reducing the cost of electricity.

[0003] In the design process of the existing wind and wave hybrid power generation system, it is considered that the nonlinear load caused by the float entering and exiting the water under extreme conditions may threaten the safety of the wind turbine system. At the same time, the float and the wind turbine are shut down, reducing the wave energy capture width. If the wave energy converter can be guaranteed to work normally under extreme conditions and avoid the impact of the impact load, the ability of the integrated system to capture wave energy will be significantly improved. Increasing the mass of the float without changing the shape of the float and changing the draft of the float can significantly reduce the frequency of the impact load. In addition, the wave energy converter will further increase the wave load on the system, especially under extreme conditions, which will significantly increase the survival pressure of the mooring system and limit the design of the wind and wave energy system. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a float mass adjustment method for a floating wind-wave energy power generation system, comprising the following steps: S100, collecting working condition data; S200, establishing a wind-wave-current coupling numerical model; S300, determining the current working condition state of the float according to the collected working condition data, wherein the working condition state of the float is divided into a general working condition and an extreme working condition, and when the working condition data meets a preset value, it is determined to be a general working condition; when the working condition data exceeds a preset value, it is determined to be an extreme working condition; S400, when it is a general working condition, bringing the working condition data of the general working condition into the wind-wave-current coupling numerical model, calculating the working condition data of each float in the mooring system, so as to determine the optimal float mass of each float in the mooring system under the general working condition, and adjusting the mass of each float separately; S500, when it is an extreme working condition, bringing the working condition data of the extreme working condition into the wind-wave-current coupling numerical model, analyzing the loading condition of the mooring system, and determining the optimal float mass of each float under the extreme working condition by comprehensively considering the system output power and the system survival pressure.

[0005] The present invention provides a float mass regulating device for a floating wind wave energy power generation system, comprising: A data acquisition module is used to collect working condition data; a model building module is used to build a wind-wave-current coupling numerical model; a working condition determination module is used to determine the current working condition state of the float according to the collected working condition data, and the working condition state of the float is divided into general working condition and extreme working condition. When the working condition data meets the preset value, it is determined to be a general working condition; when the working condition data exceeds the preset value, it is determined to be an extreme working condition; a general working condition processing module is used for general working conditions, and the working condition data of the general working condition is brought into the wind-wave-current coupling numerical model, and the working condition data of each float in the mooring system is calculated to determine the optimal float mass of each float in the mooring system under general working conditions, and the mass of each float is adjusted separately; an extreme working condition processing module, when it is an extreme working condition, brings the working condition data of the extreme working condition into the wind-wave-current coupling numerical model, analyzes the loading condition of the mooring system, and determines the optimal float mass of each float under extreme working conditions by comprehensively considering the system output power and the system survival pressure.

[0006] The present invention also provides a computer-readable storage medium, which stores computer instructions. When the computer is executed by a processor, the float mass adjustment method of the floating wind and wave energy power generation system as described in any of the above embodiments is implemented.

[0007] The present invention also provides an electronic device, comprising at least one processor and a memory communicatively connected to the processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the processor executes a float mass adjustment method for a floating wind and wave energy power generation system as in any of the above embodiments.

[0008] Compared with the prior art, the float mass adjustment method of a floating wind wave energy power generation system provided by the present invention has the following beneficial effects: 1. Apply active control technology to wind and wave energy power generation systems to improve the output power of wave energy converters under normal working conditions and solve the impact load caused by water inflow and outflow under extreme working conditions to enable them to work normally.

[0009] 2. The use of the float mass adjustment method under extreme working conditions is optimized by comprehensively considering the comprehensive output power and the survival pressure of the mooring system, which is conducive to maintaining the safety and stability of the system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 A flow chart of a float mass adjustment method for a floating wind and wave energy power generation system provided in Embodiment 1 of the present invention; Figure 2 A structural diagram of a wind and wave energy system provided in Embodiment 1 of the present invention; Figure 3 A model diagram of a wind wave energy system platform provided in Embodiment 1 of the present invention; Figure 4 This is a model verification diagram of the wind turbine part of the wind-wave-current coupling model provided in the first embodiment of the present invention; Figure 5 This is a partial model verification diagram of the wave energy converter of the wind-wave-current coupling model provided in the first embodiment of the present invention; Figure 6 This is a result diagram of wave energy converter output power corresponding to floats with different drafts provided in the first embodiment of the present invention; Figure 7 A diagram showing the high-order polynomial fitting results provided in the first embodiment of the present invention; Figure 8 A flowchart of selecting the draft depth of a float under general working conditions provided in the first embodiment of the present invention; Fig. 9 The output power of the wave energy converter and the time when the float comes out of the water for working conditions 1-8 provided in the first embodiment of the present invention; Fig.10 A power spectrum density diagram of the mooring load on the mooring cable 3 of scheme 0 provided in embodiment 1 of the present invention; Fig.11 A comparison diagram of Scheme 0 and Scheme 2 when the incident wave direction is 30 degrees provided in Embodiment 1 of the present invention; Fig.12 A structural block diagram of a float mass regulating device for a floating wind and wave energy power generation system provided in the second embodiment of the present invention; Fig.13 This is a schematic diagram of the structure of an electronic device provided in Embodiment 4 of the present invention. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0013] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0014] Embodiment 1 The present invention provides a float mass adjustment method for a floating wind wave energy power generation system. The adjustment method is divided into two parts: one is a mass adjustment method based on output power under normal working conditions, which is a general working condition; the other is a float mass adjustment method based on the operation of the float under different incident wave conditions and the survival pressure of the mooring system under extreme working conditions, such as Figure 1 As shown, the following steps are included: S100: Collect operating condition data.

[0015] Specifically, the operating condition data includes the incident wave angle, period, wave height and wind field data of the waves.

[0016] S200. Establish a numerical model of wind-wave-current coupling.

[0017] S300, determining the current float working state according to the collected working state data, the float working state is divided into general working state and extreme working state, when the working state data meets the preset value, it is determined as the general working state; when the working state data exceeds the preset value, it is determined as the extreme working state.

[0018] Specifically, the range of operating conditions is divided according to the Beaufort wind scale. When the Beaufort wind scale of the 5WM floating wind turbine is greater than 9, it is judged as an extreme operating condition, and less than or equal to 9 is a normal operating condition.

[0019] S400, when it is a general working condition, bringing the working condition data of the general working condition into the wind-wave-current coupling numerical model, calculating the working condition data of each float in the mooring system, so as to determine the optimal float mass of each float in the mooring system under the general working condition, and adjusting the mass of each float separately; S500, when it is an extreme working condition, when it is an extreme working condition, the working condition data of the extreme working condition is brought into the wind-wave-current coupling numerical model, the loading condition of the mooring system is analyzed, and the optimal float mass of each float under the extreme working condition is determined by comprehensively considering the system output power and the system survival pressure.

[0020] Preferably, the floating wind and wave energy power generation system of the present invention is composed of a semi-submersible floating wind turbine and a plurality of oscillating float wave energy converters, and the float changes its own weight by adjusting the internal ballast water capacity. Figure 1 and Figure 2 As shown, the float is a ring structure with a height of 8m, an inner diameter of 8m, and an outer diameter of 16m. The parameters of the semi-submersible platform are shown in Table 1: Table 1

[0021] In order to determine the float mass adjustment method, it is first necessary to establish a wind-wave-current coupling model. The process of establishing a wind-wave-current coupling numerical model is as follows: establish a wind turbine model in FAST, and then establish a platform, float and mooring system model in AQWA. The float and platform are connected through a power output system, and a Fender model is established in AQWA to simulate the power output system. Subsequently, the F2A tool is used to input the tower base load calculated in FAST into AQWA for time domain solution calculation, and then the motion displacement of the wind turbine is corrected before solving the next time step. The reliability of the coupling model is verified from three parts: wind turbine power, wave energy converter output power and wind turbine platform motion response. The wind turbine model verification is as follows: Figure 4 As shown, the platform and float model verification is as follows Figure 5 shown.

[0022] It should be noted that when establishing a numerical model of wind-wave-current coupling, it is necessary to consider the impact of various complex factors on the wind turbine, such as blade pitch change and tower elastic deformation, consider the coupling between multiple floating structures in a complex environment, and finally verify the reliability of the model.

[0023] In one embodiment, the steps for calculating the output power are: The output power of the wave energy converter with different wave periods, wave heights and buoy drafts is fitted by high-order polynomials.

[0024] The formula for calculating the output power is:

[0025] Where Bpto is the damping coefficient of the power output system, is the relative speed between the platform and the fan, and t is the calculation time.

[0026] Specifically, after determining the damping coefficient of the power output system using the wind-wave-current coupling numerical model, the output power of the wave energy converter under different wave conditions is calculated, and the influence of the change in the draft of the float on the output power of the wave energy converter and the operating condition of the wind turbine is analyzed. Then, the mass adjustment method of the float under general working conditions is determined.

[0027] The output power of the wave energy converter can be expressed as:

[0028] Where Bpto is the damping coefficient of the power output system, is the relative movement speed between the platform and the fan.

[0029] In one embodiment, when it is a general working condition, the working data of the general working condition is brought into the wind-wave-current coupling numerical model, and the working data of each float in the mooring system is calculated to determine the optimal float mass of each float in the mooring system under the general working condition, and the mass of each float is adjusted separately.

[0030] Specifically, the determination of the mass adjustment method of the general working condition float assumes that the mooring system works normally and does not consider the survival pressure of the mooring system. The large mass float has a deeper draft and greater viscous damping, and its mass characteristics also lead to smaller heave motion. The small mass float has a shallow draft, small viscous damping, and a greater motion response, but the float motion is mainly affected by the Froud-Krylov force. The shallow draft float is easier to break away from the water surface, the wet surface is reduced, and the float has a water-out phenomenon. The motion response is significantly reduced, and the system operation stability is affected. Floats of different masses are suitable for different working conditions. Considering the calculation cost, it is difficult to perform time domain analysis and calculation for higher-precision sea conditions one by one. According to some calculation results, a high-order polynomial is used to fit the relationship between the output power of the wave energy converter corresponding to the different draft floats and the wave height and wave period, and the mass adjustment method of the general working condition float is determined, and then the influence of the float mass on the output power of the wind turbine is analyzed to avoid excessive impact on the wind turbine.

[0031] In one embodiment, the mass of the float in general working conditions is adjusted by the output power and the float out of water time, and the specific determination steps are: S410, inputting different wave heights, periods, and draft depths of floats into the wind-wave-current coupling numerical model, calculating the output power of the float under different input conditions, and then performing high-order polynomial fitting; S420, inputting the period and the irregular wave height of the actual sea condition into the fitting result to obtain the output power of the float at different drafts; S430: Determine the optimal draft of the float according to the output power and the draft of the float, and then adjust the mass of the float.

[0032] Specifically, after determining the optimal damping coefficient, the output power of the float at different drafts in the wave period range of 5s-15s and wave height range of 2m-8m is calculated as follows: Figure 6 and Figure 7 As shown, Figure 6As shown in a, when the wave height is low, the 2m draft float is the highest in the entire period range. Except for the 1m draft float whose waterline is too shallow, the floats of other different drafts will basically not come out of the water, and the wave loads they are subjected to are basically the same. The main reason for the difference in output power is that the float with a deeper draft has a greater viscous damping and more energy loss. When the wave height increases to 6m, the 2m draft float appears to be obviously out of the water, and the output power drops significantly. The ability of the 3m and 4m draft floats to absorb wave energy exceeds that of the 2m draft float. By comparing the power differences between the 3m, 4m and 5m draft floats, it can be found that as the wave height increases, the influence of viscous damping and the mass characteristics of the float on the output power gradually decreases, and the influence of the draft depth of the float on the wave load changes gradually becomes obvious. When the amplitude rises to 8m, the calculation results are as follows Figure 6 As shown in Figure d, the 3m draft float also broke away from the water surface, and the output power of the 4m draft float exceeded that of the 3m draft float. The 5m draft float did not break away from the water, but the output power gap with the 4m draft float also became larger. This is because the float is shorter above water, resulting in the float being submerged by the waves when the wave height is high, and the upper surface of the float generates a force opposite to the direction of movement.

[0033] It should be noted that when the period is short, the wave period is far from the natural period of the platform, the platform movement speed is small, and the output power of the wave energy converter is mainly affected by the movement of the float. When the period becomes longer and close to the natural period of the platform, the movement speed of the platform becomes significantly larger, and the output power of the system is mainly controlled by the relative movement of the platform and the float. The effect of the change in the draft of the float on the output power will be diluted. If the phase of the float movement and the platform movement is close, the output power will be significantly reduced. Phase control of the wave energy converter can solve this problem and improve the output power of the system. The improvement of the float output power is mainly concentrated in the working conditions with smaller wave periods.

[0034] Then, according to the calculation results, a high-order polynomial is used to fit the relationship between the output power of the wave energy converter corresponding to the different draft floats and the wave height and wave period, as shown in Table 2. According to the determination coefficient R 2 Determine whether the fitting result can accurately reflect the numerical relationship between the output power of the adjustable mass float and the wave period and wave height: Table 2

[0035] Then according to Figure 8 The process shown in the figure determines the float mass adjustment method for general working conditions, and then the adjustment method is verified under the 8 working conditions shown in Table 3.

[0036] Table 3

[0037] As shown in Table 3 above, conditions 1 to 6 are general conditions for normal system operation, and conditions 7 and 8 are extreme conditions. The initial adjustment method for extreme conditions is the same as that for general conditions, so whether the adjustment method can avoid the impact load on the float under extreme conditions is also verified. The calculation time is 4000s, and the calculation results of the float out of water time and the output power of the wave energy converter under 8 conditions are as follows Fig. 9 shown.

[0038] The draft depth of the corresponding float of the wave energy converter with the highest output power under different working conditions is consistent with the result of the selection of the mass adjustment method. By observing the time when the float leaves the water surface, it can be found that under the environmental conditions of low wave heights in working conditions 1 to 5, the floats of the three drafts will not leave the water surface, and the difference between different floats is small. As the wave height increases, the floats with drafts of 2m and 3m begin to show obvious water outflow. The longer the float leaves the water surface, the more times the float enters the water and generates impact loads. Under the environmental conditions of working condition 8, the water outflow time of the 2m draft float reaches 249.9s, and the power difference with the 4m draft float reaches 19.3%. Under the extreme working conditions of EC8, the time for the 4m draft float to leave the water surface is 2.6s, and basically no impact load will occur.

[0039] In one embodiment, when the working condition is extreme, the working condition data of the extreme working condition is brought into the wind-wave-current coupling numerical model, the loading condition of the mooring system is analyzed, and the optimal float mass of each float under the extreme working condition is determined by comprehensively considering the system output power and the system survival pressure.

[0040] The mass adjustment method of the float in extreme working conditions is determined, taking into account the survival pressure of the mooring system. When the wind speed exceeds the cut-out wind speed of the wind turbine, the wind turbine is shut down, and the influence of the float on the wind power is not considered. First, the mass of the float is adjusted according to the adjustment method of general working conditions, and the output power is increased as much as possible without the float leaving the water surface and causing impact load. Then, the changes in the incident wave angle and the load of the mooring system are calculated, and the tension of the mooring cable with the greatest survival pressure is analyzed. The mass of the float at different positions is further increased to study its influence on the mooring load, and the mass of the float at different positions is adjusted again for the purpose of protecting the mooring system.

[0041] The mass adjustment method of the float under extreme working conditions is designed by analyzing the float's water exit time and the maximum tension and standard deviation of the tension on the mooring system: S510. Analyze the influence of different incident wave angles on the maximum and standard deviation of tension of different moorings under extreme working conditions; S520. Design quality adjustment schemes for different positions according to the analysis results, and then adjust the quality of the floats at different positions according to actual working conditions.

[0042] The operating state of the float and the load of the mooring system under different wave conditions are considered. The instantaneous impact load generated by the float entering and exiting the water will affect the stability of the system. At the same time, mooring breakage under extreme conditions is also a common form of failure. Therefore, the float's water exit time and the maximum tension and standard deviation of the tension on the mooring system are analyzed to design the float mass adjustment method for extreme conditions. According to Table 3 above, it can be seen that in extreme conditions, the float depth is generally greater than 4m, and the float rarely exits the water, so the influence of the float's water exit time does not need to be considered. Only the maximum tension and standard deviation of the tension on the mooring system are considered to design the mass of the float under extreme conditions.

[0043] Specifically, in the extreme working condition float mass adjustment method, the extreme working condition considers the influence of the mass adjustment of the float at different positions on the system. The calculated mooring load changes with the counterclockwise change of the wave incident wave direction as shown in Table 4.

[0044] Table 4

[0045] From Table 4 above, it can be found that the impact of incident wave deflection on mooring load is very significant. As the incident wave direction deflects counterclockwise, the tension on mooring cable 3 increases significantly, while the mooring load on mooring cable 1 and mooring cable 2 decreases significantly. Compared with the case when the incident wave is 0 degrees, the maximum tension of the mooring system increases by 62.1%, and the maximum standard deviation increases by 81.9%. It is necessary to further adjust the mass of the float to reduce the survival pressure of the mooring system.

[0046] As shown in Table 5, seven adjustment schemes for different drafts of the mooring system floats are designed, and the influence of the increase of the float mass in different orientations on the mooring system is calculated and analyzed.

[0047] Table 5

[0048] Table 6 Mooring tension at 0 degrees in incident wave direction

[0049] Table 7 Mooring tension at 30 degrees in the incident wave direction

[0050] Table 8 Mooring tension at 60 degrees in the incident wave direction

[0051] As shown in Tables 6 to 8, when the incident wave is not deflected, the output powers of Scheme 2 and Scheme 3 are basically the same. The mass of the float can be adjusted according to the service life and wear of the mooring cable during actual operation of the system. When the mooring cable 2 is seriously worn out, the mass of the float 3 is increased. Conversely, when the mooring cable 3 is seriously worn out, the mass of the float 2 is increased.

[0052] When the incident wave is deflected, the mooring load on the mooring cable 3 increases significantly, and the main research is on the survival pressure of the mooring cable 3. In order to reduce the survival pressure of the mooring cable 3, it is necessary to first determine the reason for the increase in its mooring load. The power spectrum density of the mooring load 3 is calculated when the incident wave direction is 0 and 30 degrees without adjusting the mass of the float. Fig.10 As shown, it can be found that the main reason for the increase in the survival pressure of the mooring cable is the increase in the high-frequency mooring load. The six degrees of freedom of the floating structure along the xyz axis translation and rotation are mainly sway, sway, heave, pitch, bow and bow. The energy of the high-frequency mooring load is mainly controlled by heave, roll and pitch motion. By comparing the power spectrum density of the wind turbine heave, roll and pitch motion, it is found that the deflection of the incident wave has basically no effect on the heave response of the wind turbine, the wind turbine roll response is significantly increased, and the pitch response is reduced to a certain extent, so the pitch response has little effect on the mooring cable 3.

[0053] Compared with Schemes 1-3, when the incident wave direction is 30 degrees, Scheme 2 has the most significant effect on reducing the survival pressure of mooring cable 3. The power spectrum density of mooring cable 3 load and wind turbine rolling motion of Scheme 2 is calculated as follows: Fig.11 As shown. It can be found that although the roll response increases compared to scheme 0, the mooring load in the high-frequency band is much reduced. This is because the increase in the mass of float 2 leads to a decrease in the vertical swing motion of the wind turbine. The increase in roll response does not lead to an increase in the load on the mooring cable 3, indicating that when the incident wave direction deflects to 30 degrees, the impact of the pitch response on the mooring cable 3 is smaller than the vertical swing response. Therefore, the main reason why the survival pressure of the mooring cable 3 changes with the deflection of the incident wave is that the load of the mooring cable 3 is more affected by the vertical swing direction motion response. Comparing the load calculation results, the mass change of float 2 with counterclockwise deflection in the inflow direction has the most significant effect on the vertical swing direction motion of the wind turbine, followed by float 1. According to this characteristic, the mass of the float can be further adjusted by comprehensively considering the output power of the float and the survival pressure of the mooring system according to the change of the inflow angle. Combining the above methods, the wind and wave energy generation system can adjust the mass of the float according to the real-time monitored sea conditions during operation.

[0054] Specifically, different wave conditions include different incident wave angles, periods and wave heights. The wind speeds of the calculated working conditions are all greater than the cut-out wind speed of the wind turbine, the wind turbine is locked and shut down, and the influence of the float mass adjustment on the wind power is not considered.

[0055] In one embodiment, the float out of water time can be obtained by analyzing the Freud-Krylov force in the calculation results. The Freud-Krylov force can be expressed as:

[0056] In the formula, S w is the wetted surface area of ​​the floating structure, p is the undisturbed pressure of the wave on the surface of the structure, and n is the normal unit vector on the surface of the object.

[0057] Embodiment 2 The present invention also provides a float mass regulating device for a floating wind and wave energy power generation system, such as Fig.12 As shown, including: Data acquisition module, used to collect working condition data; Model building module, to build a wind-wave-current coupling numerical model; The working condition determination module is used to determine the current working condition of the float according to the collected working condition data. The working condition of the float is divided into general working condition and extreme working condition. When the working condition data meets the preset value, it is determined to be a general working condition; when the working condition data exceeds the preset value, it is determined to be an extreme working condition; The general working condition processing module is used for general working conditions. The working condition data of general working conditions are brought into the wind-wave-current coupling numerical model to calculate the working condition data of each float in the mooring system to determine the optimal float mass of each float in the mooring system under general working conditions, and the mass of each float is adjusted separately; The extreme working condition processing module is used for extreme working conditions. The working condition data of extreme working conditions are brought into the wind-wave-current coupling numerical model, the working condition data of each float in the mooring system are calculated, and the floats in the mooring system are linked to adjust the mass according to the working condition data of each float, so as to determine the optimal float mass of each float in the mooring system under extreme working conditions.

[0058] Embodiment 3 This embodiment provides a computer-readable storage medium, which stores computer instructions. When the computer is executed by a processor, the float mass adjustment method of the floating wind and wave energy power generation system of the first embodiment is implemented.

[0059] In a specific implementation, the computer-readable storage medium is a magnetic disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory (Flash Memory), a hard disk (HDD) or a solid-state drive (SSD), etc.; the computer-readable storage medium may also include a combination of the above-mentioned types of memory.

[0060] Embodiment 4 This embodiment provides an electronic device, such as Fig.13 As shown, it is characterized by: comprising at least one processor and a memory connected to the processor in communication, wherein the memory stores instructions that can be executed by at least one processor, and the instructions are executed by at least one processor so that the processor executes the float mass adjustment method of the floating wind and wave energy power generation system as described in the first embodiment above.

[0061] In specific implementation, the number of processors may be one or more, and the processor may be a central processing unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components and other chips, or a combination of the above-mentioned chips. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0062] The memory and the processor may be communicatively connected via a bus or other means, and the memory stores instructions executable by at least one processor, and the instructions are executed by at least one processor so that the processor executes the float mass adjustment method for the floating wind and wave energy power generation system as described in the above method embodiment.

[0063] Although the terms such as working condition data, wind-wave-current coupling numerical model, float working condition, general working condition, extreme working condition and float mass are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for adjusting the mass of a float of a floating wind and wave energy power generation system, characterized in that: The steps include: S100, collecting working condition data; S200, establish a numerical model of wind-wave-current coupling; S300, determining the current working state of the float according to the collected working state data, wherein the working state of the float is divided into a general working state and an extreme working state, and when the working state data meets a preset value, it is determined to be a general working state; When the working condition data exceeds the preset value, it is determined to be an extreme working condition; S400, when it is a general working condition, bringing the working condition data of the general working condition into the wind-wave-current coupling numerical model, calculating the working condition data of each float in the mooring system, so as to determine the float mass of each float in the mooring system under the general working condition, and adjusting the mass of each float separately; S500, when it is an extreme working condition, the working condition data of the extreme working condition is brought into the wind-wave-current coupling numerical model, the loading condition of the mooring system is analyzed, and the float mass of each float under the extreme working condition is determined by comprehensively considering the system output power and the system survival pressure.

2. The method for adjusting the mass of a float of a floating wind and wave energy power generation system according to claim 1, characterized in that: The working condition data include the incident wave angle, period, wave height and wind field of the waves.

3. The method for adjusting the mass of a float of a floating wind and wave energy power generation system according to claim 1, characterized in that: The range of operating conditions is divided according to the Beaufort wind scale. When the Beaufort wind scale of the 5WM floating wind turbine is greater than 9, it is judged as an extreme operating condition, and less than or equal to 9 is a normal operating condition.

4. The method for adjusting the mass of a float of a floating wind and wave energy power generation system according to claim 1, characterized in that: Steps to determine float mass under general working conditions: S410, inputting different regular wave heights, periods, and buoy drafts into the wind-wave-current coupling numerical model, calculating the buoy output power under different input conditions, and then performing high-order polynomial fitting; S420, inputting the period and the wave height of the actual sea condition into the fitting result to obtain the output power of the float at different drafts; S430: Determine the draft of the float according to the output power, and then adjust the mass of the float.

5. The method for adjusting the mass of a float of a floating wind and wave energy power generation system according to claim 1, characterized in that: The mass adjustment method of the float in extreme working conditions is designed by analyzing the maximum tension and the standard deviation of the tension on the mooring system: S510. Analyze the influence of different incident wave angles on the maximum value and standard deviation of different mooring tensions under extreme working conditions; S520. Design quality adjustment schemes for different positions according to the analysis results, and then adjust the quality of the floats at different positions according to actual working conditions.

6. The method for adjusting the mass of a float of a floating wind and wave energy power generation system according to claim 4, characterized in that: The steps to calculate the output power are: The output power of the wave energy converter with different wave periods, wave heights and buoy drafts is fitted by high-order polynomials; The formula for calculating the output power is: In the formula, B PTO is the damping coefficient of the power output system, is the relative speed between the platform and the fan, and t is the calculation time.

7. The method for adjusting the mass of a float of a floating wind and wave energy power generation system according to claim 4, characterized in that: The float out of water time is obtained according to the Froude-Krylov force analysis, and the Froude-Krylov force can be expressed as: In the formula, S w is the wetted surface area of ​​the floating structure, p is the undisturbed pressure of the wave on the surface of the structure, and n is the normal unit vector on the surface of the object.

8. A float mass adjustment device for a floating wind and wave energy power generation system, characterized in that: include: Data acquisition module, used to collect working condition data; Model building module, to build a wind-wave-current coupling numerical model; The working condition determination module is used to determine the current working condition of the float according to the collected working condition data. The working condition of the float is divided into general working condition and extreme working condition. When the working condition data meets the preset value, it is determined to be a general working condition; When the working condition data exceeds the preset value, it is determined to be an extreme working condition; The general working condition processing module is used for general working conditions. The working condition data of the general working condition is brought into the wind-wave-current coupling numerical model to calculate the working condition data of each float in the mooring system to determine the float mass of each float in the mooring system under general working conditions, and the mass of each float is adjusted separately; The extreme working condition processing module, when it is an extreme working condition, brings the working condition data of the extreme working condition into the wind-wave-current coupling numerical model, analyzes the loading condition of the mooring system, and determines the float mass of each float under the extreme working condition by comprehensively considering the system output power and the system survival pressure.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer is executed by a processor, the float mass adjustment method of the floating wind and wave energy power generation system according to any one of claims 1 to 7 is implemented.

10. An electronic device, characterized in that: The invention comprises at least one processor and a memory in communication with the processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the processor executes the float mass adjustment method of the floating wind and wave energy power generation system as described in any one of claims 1 to 7.

Images