Control method and device for wind wave integrated power generation, platform and medium

Abstract

The application discloses a kind of wind wave integrated power generation control method, device, platform and medium.The control method comprises: in the process of wind power generator power generation, the wind load of wind power generator is obtained;The tower base load data formed by the wind load of wind power generator and the gravity of wind power generator is analyzed and processed, and the time-frequency relationship of wind power generator is obtained;The current parameter of offshore floating platform is calculated based on time-frequency relationship;The orientation of the wind power generator is adjusted according to the current parameter.The application obtains the wind load of wind power generator, combines the gravity of wind power generator to form tower base load data, and analyzes and processes it to obtain time-frequency relationship;The current parameter of offshore floating platform is calculated based on time-frequency relationship, and the orientation of the wind power generator is adjusted based on the current parameter, which better realizes wind power generation and improves power generation.

Description

Technical Field

[0001] This invention belongs to the field of power generation equipment technology, specifically relating to a control method, device, platform, and medium for integrated wind and wave power generation. Background Technology

[0002] Offshore areas typically possess abundant wind and wave energy resources. Offshore wind energy is playing an increasingly important role in reducing global greenhouse gas emissions. Therefore, generating electricity using offshore wind and wave resources is relatively economical and feasible. In particular, offshore floating wind turbines are considered a more feasible and economical way to generate electricity than fixed offshore wind turbines. As a result, most existing methods of generating offshore wind power are offshore floating wind turbines.

[0003] However, the high cost of energy for offshore floating wind power generation stems from the need for expensive floating platforms and mooring systems. Furthermore, the high degree of freedom of movement on the sea surface increases the stress on the floating platform, leading to more violent movement, instability, increased risk of failure, shortened lifespan, and reduced power generation efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the low power generation efficiency of floating platforms for offshore wind turbines in the prior art, and to provide a control method, device, platform and medium for integrated wind and wave power generation.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] In a first aspect, the present invention provides a control method for integrated wind and wave power generation, the control method comprising:

[0007] During the wind turbine's power generation process, the wind load of the wind turbine is obtained;

[0008] The tower base load data, consisting of wind load and the wind turbine's own weight, are analyzed and processed to obtain the time-frequency relationship of the wind turbine.

[0009] The current parameters of the offshore floating platform are calculated based on the aforementioned time-frequency relationship;

[0010] Adjust the orientation of the wind turbine according to the current parameters.

[0011] Preferably, the step of obtaining the wind load of the wind turbine includes:

[0012] Calculate the static load of the wind turbine;

[0013] The corresponding dynamic load coefficients are obtained based on the axial and tangential induction of the wind turbine, and the dynamic load of the wind turbine is calculated based on the dynamic load coefficients.

[0014] The wind load of the wind turbine is calculated based on the static load and the dynamic load.

[0015] Preferably, the parameters include at least one of platform position, velocity, acceleration, and platform tilt angle.

[0016] Preferably, the control method further includes:

[0017] The oscillation frequency of the wave power generation device is calculated based on the time-frequency relationship.

[0018] The load of the wave power generation device is calculated based on the oscillation frequency, and the wave power generation device is controlled to generate electricity based on the load.

[0019] Preferably, the step of calculating the load of the wave power generation device based on the oscillation frequency includes:

[0020] The additional mass of the wave power generation device at the oscillation frequency and the water level offset inside the wave power generation device are obtained;

[0021] The load of the wave power generation device is calculated based on the added mass and the water level offset.

[0022] Preferably, the control method further includes:

[0023] The current hydrodynamic load is calculated based on the current parameters. The hydrodynamic load is used to provide force to the offshore floating platform so that the offshore floating platform can move within a preset range.

[0024] Preferably, the control method further includes:

[0025] Adjust the position, length, and / or tension of the mooring chains of the offshore floating platform based on the hydrodynamic load.

[0026] Secondly, the present invention provides a control device for integrated wind and wave power generation, the control device comprising:

[0027] The wind load acquisition module is used to acquire the wind load of the wind turbine during the wind turbine's power generation process.

[0028] The information processing module is used to analyze and process the tower base load data composed of the wind load and the self-weight of the wind turbine to obtain the time-frequency relationship of the wind turbine.

[0029] The parameter acquisition module is used to calculate the current parameters of the offshore floating platform based on the time-frequency relationship.

[0030] A wind power generation control module is used to adjust the orientation of the wind turbine according to the current parameters.

[0031] Thirdly, the present invention provides a wind and wave integrated power generation platform, including a wind turbine, a wave power generation device, a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the wind and wave integrated power generation control method of the present invention.

[0032] Fourthly, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the wind and wave integrated power generation control method of the present invention.

[0033] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0034] The positive and progressive effects of this invention are as follows: This invention designs a control method for wind and wave integrated power generation. By acquiring the wind load of the wind turbine, combining it with the weight of the wind turbine itself to form the tower base load data, and analyzing and processing it, a time-frequency relationship is obtained. Based on the time-frequency relationship, the current parameters of the offshore floating platform are calculated, and the orientation of the wind turbine is adjusted based on the current parameters, thereby better realizing wind power generation and improving the power generation capacity. Attached Figure Description

[0035] Figure 1 A schematic flowchart of the control method for integrated wind and wave power generation provided in Example 1.

[0036] Figure 2 This is a schematic diagram illustrating an example of platform tilt angle information analysis and processing provided in Example 1.

[0037] Figure 3 A schematic diagram of the control device for integrated wind and wave power generation provided in Example 2.

[0038] Figure 4 This is a schematic diagram of the wind and wave integrated power generation platform provided in Example 3. Detailed Implementation

[0039] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0040] Example 1

[0041] This embodiment provides a control method for integrated wind and wave power generation, such as Figure 1As shown, the control method includes:

[0042] Step S1: During the wind turbine's power generation process, obtain the wind load of the wind turbine.

[0043] In this embodiment, during the wind turbine power generation process, the wind load of the wind turbine can be calculated by the static load and dynamic load of the wind turbine. Specifically, it can include: calculating the static load of the wind turbine; obtaining the corresponding dynamic load coefficient based on the axial induction and tangential induction of the wind turbine, and calculating the dynamic load of the wind turbine based on the dynamic load coefficient; and calculating the wind load of the wind turbine based on the static load and dynamic load.

[0044] Specifically, the mass and dynamic load factor of the wind turbine are obtained. This dynamic load factor is related to the axial induction, tangential induction, and blade design of the wind turbine. In this embodiment, it can be simplified to a coefficient related to the wind turbine's rotational speed, with a value between 1.2 and 2.0. The wind load on the wind turbine can be calculated using the following formula:

[0045] F w =m w g

[0046] F m =F w ×δ-F w

[0047] F = F m +F w =F w ×δ

[0048] In the formula, F w The static load of the wind turbine is represented by m. w F represents the mass of a wind turbine. m δ represents the dynamic load of the wind turbine generator, and δ represents the dynamic load coefficient.

[0049] Step S2: Analyze and process the tower base load data composed of wind load and the wind turbine's own weight to obtain the time-frequency relationship of the wind turbine.

[0050] In this embodiment, the control method uses the wind load and its own weight of the wind turbine to form tower base load data, and then processes the tower base load data through Fourier transform to obtain the relationship between the time and frequency of the wind turbine.

[0051] Step S3: Calculate the current parameters of the offshore floating platform based on the time-frequency relationship.

[0052] The current parameters of the offshore floating platform can be its current position, velocity, acceleration, or tilt angle, or other parameters. No specific limitation is made here; this is just an example.

[0053] Step S4: Adjust the orientation of the wind turbine according to the current parameters.

[0054] In this embodiment, the control method can adjust the orientation of the wind turbine based on the current parameters of the offshore floating platform, thereby increasing the wind load on the wind turbine and thus improving the power generation. Specifically, taking the platform tilt angle as an example, such as... Figure 2 As shown in the diagram, A and B represent the mooring chains of the offshore floating platform. This occurs when the platform's tilt angle is opposite to the wind direction (see...). Figure 2 (Left part) When the wind turbine rotates according to the tilt angle of the floating platform, making it face the wind, it increases the wind load on the turbine, changes the tilt angle of the floating platform, increases platform stability, and improves power generation. Conversely, when the tilt angle of the floating platform is opposite to the wind direction (see...), the wind turbine rotates to face the wind direction, thus increasing the wind load on the turbine, changing the tilt angle of the floating platform, increasing platform stability, and improving power generation. Figure 2 (Right part) The wind turbine can rotate according to the tilt angle of the offshore floating platform, making it sideways to the wind direction. This reduces the wind load on the wind turbine, changes the tilt angle of the offshore floating platform, increases the platform's stability, and improves the power generation. This is only an example and not a specific limitation; specific situations need to be judged according to actual conditions.

[0055] As an optional embodiment, the control method further includes calculating the oscillation frequency of the wave power generation device based on the time-frequency relationship; calculating the load of the wave power generation device based on the oscillation frequency; and controlling the wave power generation device to generate electricity based on the load. In this embodiment, controlling the operation of the wave power generation device through the time-frequency relationship of the wind turbine requires that the wave power generation device be consistent with its frequency. Therefore, the oscillation frequency of the wave power generation device can be calculated based on the time-frequency relationship of the wind turbine, and the load of the wave power generation device at that oscillation frequency can be obtained. The wave power generation device is then controlled to generate electricity based on the load.

[0056] As an optional embodiment, this control method can obtain the added mass of the wave power generation device at the oscillation frequency and the water level deviation inside the wave power generation device; and calculate the load of the wave power generation device based on the added mass and the water level deviation. Specifically, the load of the wave power generation device can be calculated according to the following formula:

[0057] F OWC = (M+A) ∞ )z t =F buoy +F radiation +F viscous +Fexcitation +F PTO

[0058] In the formula, M represents the mass of the oscillating wave power generation device, and A ∞ Z represents the added mass during frequency oscillation. t This represents the average water level deviation during oscillations within the wave generator. F buoy F represents the restoring force in still water. radiation F represents the radiative force acting on the wave generator. viscous F represents viscous damping force. excitation F represents the excitation force acting on the bottom of the wave generator. PTO This refers to the aerodynamic force acting on the water surface.

[0059] As an optional embodiment, the control method can also calculate the current hydrodynamic load based on current parameters, wherein the hydrodynamic load is used to provide force to the offshore floating platform to enable the offshore floating platform to move within a preset range. Specifically, this embodiment calculates the current hydrodynamic load based on linear potential flow and viscosity correction theory. When calculating the hydrodynamic load, the added mass, radiation damping, viscous drag effect, and the interaction with the offshore floating platform are considered, so that the offshore floating platform can move within a certain range.

[0060] As an optional embodiment, the control method can also adjust the position, length, and / or tension of the mooring chains of the offshore floating platform based on the hydrodynamic load. Specifically, the position, number, length, or tension of the mooring chains of the offshore floating platform can be adjusted according to the hydrodynamic load to avoid damage to the platform structure or breakage of the mooring chains due to excessive load or displacement of the offshore floating platform.

[0061] This embodiment discloses a control method for wind and wave integrated power generation. The control method acquires the wind load of the wind turbine, combines it with the weight of the wind turbine itself to form the tower base load data, and analyzes and processes it to obtain the time-frequency relationship. Based on the time-frequency relationship, the current parameters of the offshore floating platform are calculated, and the orientation of the wind turbine is adjusted based on the current parameters, thereby better realizing wind power generation and improving the power generation capacity.

[0062] Example 2

[0063] This embodiment provides a control device for integrated wind and wave power generation, such as... Figure 3 As shown, the control device includes a wind load acquisition module 11, an information processing module 12, a parameter acquisition module 13, and a wind power generation control module 14.

[0064] The wind load acquisition module 11 is used to acquire the wind load of the wind turbine during the wind turbine power generation process.

[0065] In this embodiment, during the wind turbine power generation process, the wind load acquisition module 11 can calculate the wind load of the wind turbine by the static load and dynamic load of the wind turbine. Specifically, it can include: calculating the static load of the wind turbine; obtaining the corresponding dynamic load coefficient based on the axial induction and tangential induction of the wind turbine, and calculating the dynamic load of the wind turbine based on the dynamic load coefficient; and calculating the wind load of the wind turbine based on the static load and dynamic load.

[0066] Specifically, the wind load acquisition module 11 acquires the mass and dynamic load coefficient of the wind turbine, wherein the dynamic load coefficient is related to the axial induction, tangential induction, and blade design of the wind turbine, and in this embodiment, it can be simplified to a coefficient related to the rotational speed of the wind turbine, with a value between 1.2 and 2.0; the wind load of the wind turbine can be calculated using the following formula:

[0067] F w =m w g

[0068] F m =F w ×δ-F w

[0069] F = F m +F w =F w ×δ

[0070] In the formula, F w The static load of the wind turbine is represented by m. w F represents the mass of a wind turbine. m δ represents the dynamic load of the wind turbine generator, and δ represents the dynamic load coefficient.

[0071] The information processing module 12 is used to analyze and process the tower base load data composed of wind load and the wind turbine's own weight to obtain the time-frequency relationship of the wind turbine.

[0072] In this embodiment, the information processing module 12 uses the wind load and its own weight of the wind turbine to form tower base load data, and then processes the tower base load data through Fourier transform to obtain the relationship between the time and frequency of the wind turbine.

[0073] The parameter acquisition module 13 is used to calculate the current parameters of the offshore floating platform based on the time-frequency relationship.

[0074] The current parameters of the offshore floating platform can be its current position, velocity, acceleration, or tilt angle, or other parameters. No specific limitation is made here; this is just an example.

[0075] The wind power generation control module 14 is used to adjust the orientation of the wind turbine according to the current parameters.

[0076] In this embodiment, the wind power generation control module 14 can adjust the orientation of the wind turbine according to the obtained current parameters, thereby increasing the wind load on the wind turbine and thus increasing the power generation. Specifically, taking the platform tilt angle as an example, the wind power generation control module 14... Figure 2 As shown in the diagram, A and B represent the mooring chains of the offshore floating platform. This occurs when the platform's tilt angle is opposite to the wind direction (see...). Figure 2 (Left part) When the wind turbine rotates according to the tilt angle of the floating platform, making it face the wind, it increases the wind load on the turbine, changes the tilt angle of the floating platform, increases platform stability, and improves power generation. Conversely, when the tilt angle of the floating platform is opposite to the wind direction (see...), the wind turbine rotates to face the wind direction, thus increasing the wind load on the turbine, changing the tilt angle of the floating platform, increasing platform stability, and improving power generation. Figure 2 (Right part) The wind turbine can rotate according to the tilt angle of the offshore floating platform, making it sideways to the wind direction. This reduces the wind load on the wind turbine, changes the tilt angle of the offshore floating platform, increases the platform's stability, and improves the power generation. This is only an example and not a specific limitation; specific situations need to be judged according to actual conditions.

[0077] This embodiment discloses a control device for integrated wind and wave power generation. The device is based on the control method for integrated wind and wave power generation provided in Embodiment 1 of the present invention. By acquiring the wind load of the wind turbine, combining it with the weight of the wind turbine itself to form the tower base load data, and analyzing and processing it, a time-frequency relationship is obtained. Based on the time-frequency relationship, the current parameters of the offshore floating platform are calculated, and the orientation of the wind turbine is adjusted based on the current parameters, thereby better realizing wind power generation and improving the power generation capacity.

[0078] Example 3

[0079] This embodiment provides a wind and wave integrated power generation platform, which includes a wind turbine, a wave power generation device, a memory, a processor, and a computer program stored in the memory and used to run on the processor. When the processor executes the program, it implements the wind and wave integrated power generation control method of Embodiment 1 above.

[0080] like Figure 4 The wind and wave integrated power generation platform 30 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of the present invention.

[0081] The wind and wave integrated power generation platform 30 can be represented in the form of a general computing device, such as a server device. The components of the wind and wave integrated power generation platform 30 may include, but are not limited to: at least one processor 31, at least one memory 32, and a bus 33 connecting different system components (including memory 32 and processor 31).

[0082] Bus 33 includes a data bus, an address bus, and a control bus.

[0083] The memory 32 may include volatile memory, such as random access memory (RAM) 321 and cache memory 322, and may further include read-only memory (ROM) 323.

[0084] The memory 32 may also include a program tool 325 having a set (at least one) of program modules 324, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0085] The processor 31 executes various functional applications and data processing by running computer programs stored in the memory 32, such as the wind and wave integrated power generation control method of Embodiment 1 of the present invention.

[0086] The wind and wave integrated power generation platform 30 can also communicate with one or more external devices 34. This communication can be achieved through the input / output (I / O) interface 35. Furthermore, the model generation device 30 can also communicate with one or more networks via a network adapter 36. Figure 4 As shown, network adapter 36 communicates with other modules of the model-generating device 30 via bus 33. It should be understood that, although... Figure 4 Unless otherwise specified, the device 30 generated in conjunction with the model may use other hardware and / or software modules, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems.

[0087] It should be noted that although several units / modules or sub-units / modules of the wind and wave integrated power generation platform are mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of the present invention, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided and embodied by multiple units / modules.

[0088] Example 4

[0089] This embodiment provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the wind and wave integrated power generation control method of Embodiment 1 described above.

[0090] The readable storage medium may be more specifically adopted, including but not limited to: portable disk, hard disk, random access memory, read-only memory, erasable programmable read-only memory, optical storage device, magnetic storage device, or any suitable combination thereof.

[0091] In an alternative embodiment, the present invention can also be implemented as a program product, which includes program code. When the program product is run on a terminal device, the program code is used to cause the terminal device to execute the control method for integrated wind and wave power generation of Embodiment 1 described above.

[0092] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A control method for integrated wind and wave power generation, characterized in that, The control method includes: During the wind turbine's power generation process, the wind load of the wind turbine is obtained; The tower base load data, consisting of wind load and the wind turbine's own weight, are analyzed and processed to obtain the time-frequency relationship of the wind turbine. Calculate the current parameters of the offshore floating platform based on the aforementioned time-frequency relationship; The current parameters include the platform tilt angle; The orientation of the wind turbine is adjusted according to the current parameters to increase the wind load on the wind turbine and change the tilt angle of the offshore floating platform. The step of obtaining the wind load of the wind turbine includes: Calculate the static load of the wind turbine; The corresponding dynamic load coefficients are obtained based on the axial and tangential induction of the wind turbine, and the dynamic load of the wind turbine is calculated based on the dynamic load coefficients. The wind load of the wind turbine is calculated based on the static load and the dynamic load. The control method further includes: The oscillation frequency of the wave power generation device is calculated based on the time-frequency relationship. The load of the wave power generation device is calculated based on the oscillation frequency, and the wave power generation device is controlled to generate electricity based on the load. To control the operation of the wave power generation device through the time-frequency relationship, the frequency of the wave power generation device needs to be consistent with that of the wind turbine. The step of calculating the load of the wave power generation device based on the oscillation frequency includes: The additional mass of the wave power generation device at the oscillation frequency and the water level offset inside the wave power generation device are obtained; The load of the wave power generation device is calculated based on the added mass and the water level offset. The load of the wave power generation device is calculated using the following formula: ； in, M represents the load of the wave power generation device, and M represents the mass of the wave power generation device. The additional mass represents the frequency oscillation. This represents the average water level shift during internal oscillations of the wave power generation device. Represents the restoring force of still water. This represents the radiative force acting on the wave power generation device. Indicates viscous damping force. This represents the excitation force acting on the bottom of the wave power generation device. This refers to the aerodynamic force acting on the water surface.

2. The control method for integrated wind and wave power generation as described in claim 1, characterized in that, The current parameters also include at least one of platform position, speed, and acceleration.

3. The control method for integrated wind and wave power generation as described in claim 1, characterized in that, The control method further includes: The current hydrodynamic load is calculated based on the current parameters. The hydrodynamic load is used to provide force to the offshore floating platform so that the offshore floating platform can move within a preset range.

4. The control method for integrated wind and wave power generation as described in claim 3, characterized in that, The control method further includes: Adjust the position, length, and / or tension of the mooring chains of the offshore floating platform based on the hydrodynamic load.

5. A control device for integrated wind and wave power generation, wherein the control device is implemented based on the control method for integrated wind and wave power generation according to any one of claims 1-4, characterized in that, The control device includes: The wind load acquisition module is used to acquire the wind load of the wind turbine during the wind turbine's power generation process. The information processing module is used to analyze and process the tower base load data composed of the wind load and the self-weight of the wind turbine to obtain the time-frequency relationship of the wind turbine. The parameter acquisition module is used to calculate the current parameters of the offshore floating platform based on the time-frequency relationship. A wind power generation control module is used to adjust the orientation of the wind turbine according to the current parameters.

6. A wind and wave integrated power generation platform, comprising a wind turbine, a wave power generation device, a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the control method as described in any one of claims 1-4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the control method as described in any one of claims 1-4.

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