A coordinated control method for wave power generation system

Abstract

The present invention relates to the field of wave energy generator control technology, and specifically to a collaborative control method for a wave power generation system. The present invention first obtains the wave height value and the wave period value in real time; further obtains the wave height stability parameter and the wave period stability parameter at the current time point; further integrates the wave height stability parameter and the wave period stability parameter at the current time point to obtain the environmental stability parameter at the current time point; further obtains the corrected buoyancy value at the current time point based on the environmental stability parameter at the current time point; finally, controls the air displacement of the wave power generation system at the current time point based on the corrected buoyancy value at the current time point. The present invention analyzes the real-time environmental stability characteristics from two perspectives, wave height and wave period, and adjusts the buoyancy value and air displacement of the wave power generation system according to the real-time environmental stability characteristics, so as to better adapt to the current sea surface wave environment and improve the power generation efficiency and stability of the wave power generation system.

Description

Technical Field

[0001] The present invention relates to the technical field of wave power generator control, and in particular to a coordinated control method for a wave power generation system. Background Art

[0002] Wave Energy Conversion System (WEC) is a renewable energy system that uses the energy of ocean waves to generate electricity. This system converts the kinetic energy and potential energy of ocean waves into electrical energy to provide electricity for land and marine facilities. The basic principle of wave power generation is to capture the energy of waves during the ups and downs of ocean waves through devices such as floating devices, swing buoys, wave energy conversion devices, etc. These devices usually float in the ocean or are fixed to the seabed, and convert the mechanical energy of waves into electrical energy through mechanical devices such as hydraulic pumps, turbines or generators.

[0003] In the process of energy capture, common energy capture devices include buoy type, swing buoy type and wave snake type. Traditionally, the working parameters of the energy capture device are fixed, such as the buoyancy value is fixed. However, due to the uncertainty of the intensity of wave fluctuations, it is easy for the buoyancy setting to be inaccurate during the energy capture process, resulting in low power generation efficiency: if the wave fluctuations are too large and the buoyancy setting is too small, due to the existence of inertia, the energy capture device may not be able to effectively follow the wave movement, reducing the motion capture efficiency of the power generation system and reducing the power generation efficiency; for example, when the wave fluctuations are too small and the buoyancy setting is too large, the energy capture device will float too much on the water surface and cannot effectively move with the waves, resulting in low power generation efficiency. Therefore, how to adaptively adjust the wave power generation system to improve the power generation efficiency and stability of the wave power generation system has become a practical problem that needs to be solved urgently. Summary of the invention

[0004] In order to solve the technical problem that the fixed parameter setting of the traditional wave power generation system leads to low power generation efficiency, the purpose of the present invention is to provide a coordinated control method of the wave power generation system. The technical solution adopted is as follows:

[0005] A coordinated control method for a wave power generation system, the method comprising:

[0006] Obtain wave height and wave period values ​​in real time; obtain initial air displacement and initial buoyancy values ​​of the power generation system;

[0007] According to the fluctuation characteristics of the wave height value in the preset historical neighborhood at the current time point, the wave height stability parameter at the current time point is obtained; according to the concentrated characteristics of the wave period value in the preset historical neighborhood at the current time point, the wave period stability parameter at the current time point is obtained; the wave height stability parameter at the current time point and the wave period stability parameter are integrated to obtain the environmental stability parameter at the current time point; the wave height stability parameter and the wave period stability parameter are both positively correlated with the environmental stability parameter; according to the environmental stability parameter at the current time point, combined with the initial buoyancy value, the corrected buoyancy value at the current time point is obtained;

[0008] According to the corrected buoyancy value at the current time point, in combination with the initial air displacement and the initial buoyancy value, the air displacement of the wave power generation system at the current time point is controlled.

[0009] Furthermore, the method for obtaining the wave height stability parameter includes:

[0010] According to the preset time window, the preset historical neighborhood of the current time point is segmented to obtain multiple historical time periods;

[0011] According to the fluctuation stability of the wave height values ​​in each of the historical time periods and the concentrated characteristics of the wave height values, a wave height stability sub-parameter is obtained for each of the historical time periods; the fluctuation stability of the wave height values ​​and the concentrated characteristics of the wave height values ​​are both positively correlated with the wave height stability sub-parameter;

[0012] The wave height stability sub-parameters of all the historical time periods corresponding to the current time point are integrated to obtain the wave height stability parameter at the current time point.

[0013] Furthermore, the method of fusing the wave height stability sub-parameters of all the historical time periods corresponding to the current time point to obtain the wave height stability parameter at the current time point includes:

[0014] The average value of the wave height stability sub-parameters of all the historical time periods corresponding to the current time point is used as the wave height stability parameter at the current time point.

[0015] Furthermore, the method for obtaining the wave period stability parameter includes:

[0016] At least according to the average value of the wave period values ​​at all time points in the historical time period, the wave period stability sub-parameter of each historical time period is obtained; the average value of the wave period values ​​at all time points in the historical time period is positively correlated with the wave period stability sub-parameter;

[0017] The wave cycle stability sub-parameters of all the historical time periods corresponding to the current time point are integrated to obtain the wave cycle stability parameter of the current time point.

[0018] Furthermore, the method of fusing the wave cycle stability sub-parameters of all the historical time periods corresponding to the current time point to obtain the wave cycle stability parameter at the current time point includes:

[0019] The wave cycle stability sub-parameter is normalized, and the sum of the normalized wave cycle stability sub-parameters of all the historical time periods corresponding to the current time point is used as the wave cycle stability parameter of the current time point.

[0020] Furthermore, the method for obtaining the environmental stability parameter includes:

[0021] The wave height stability parameter and the wave period stability parameter at the current time point are weighted and summed, and the weighted sum result is used as the environmental stability parameter at the current time point.

[0022] Furthermore, the method for obtaining the corrected buoyancy value includes:

[0023] The environmental stability parameter at the current time point is negatively correlated and mapped to a preset adjustment interval as a buoyancy adjustment coefficient;

[0024] The product of the initial buoyancy value and the buoyancy adjustment coefficient is used as the buoyancy adjustment value; and the sum of the buoyancy adjustment value and the initial buoyancy value is used as the corrected buoyancy value at the current time point.

[0025] Furthermore, the method for controlling the air displacement of the wave power generation system at the current time point according to the corrected buoyancy value at the current time point, in combination with the initial air displacement and the initial buoyancy value, includes:

[0026] According to the initial air displacement and the initial buoyancy value, the buoyancy value per unit air displacement is obtained; according to the corrected buoyancy value at the current time point and the buoyancy value per unit air displacement, the corrected air displacement at the current time point is obtained; and the air displacement of the wave power generation system is adjusted to the corrected air displacement.

[0027] Furthermore, the length of the preset historical neighborhood is 10 minutes, and the end point of the preset historical neighborhood is the current time point.

[0028] Furthermore, the length of the preset time window is 1 minute.

[0029] The present invention has the following beneficial effects:

[0030] The present invention first obtains the wave height value and wave period value in real time to provide a basis for subsequent data analysis; obtains the initial air displacement and initial buoyancy value of the power generation system to facilitate the subsequent analysis of the relationship between buoyancy and air displacement, and adjusts the air displacement at the current moment; further, according to the fluctuation characteristics of the wave height value in the preset historical neighborhood at the current time point, obtains the wave height stability parameter at the current time point to characterize the stability of the wave height value, and measures the stability characteristics of the environment from the perspective of wave height stability; further, according to the concentrated characteristics of the wave period value in the preset historical neighborhood at the current time point, obtains the wave period stability parameter at the current time point to characterize the stability of the wave period value, and measures the stability characteristics of the environment from the perspective of wave height stability. The wave period stability angle measures the stability characteristics of the environment; further integrates the wave height stability parameter and the wave period stability parameter at the current time point, obtains the environmental stability parameter at the current time point, and comprehensively integrates the two analysis angles to jointly represent the stability characteristics of the environment, providing a basis for subsequent adjustment of the parameters of the wave power generation system; further based on the environmental stability parameter at the current time point, combined with the initial buoyancy value, obtains the corrected buoyancy value at the current time point, determines the buoyancy value required at the current time point, and provides a basis for subsequent control of air displacement; finally, based on the corrected buoyancy value at the current time point, combined with the initial air displacement and the initial buoyancy value, controls the air displacement of the wave power generation system at the current time point. The present invention analyzes the real-time environmental stability characteristics from the two angles of wave height and wave period, adjusts the buoyancy value and air displacement of the wave power generation system according to the real-time environmental stability characteristics, is more adapted to the current sea surface wave environment, and improves the power generation efficiency and stability of the wave power generation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only 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.

[0032] Figure 1 A flow chart of a coordinated control method of a wave power generation system provided by one embodiment of the present invention;

[0033] Figure 2 A flow chart of a method for obtaining wave height stability parameters provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the coordinated control method of a wave power generation system proposed by the present invention, its specific implementation method, structure, characteristics and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0035] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0036] A specific scheme of a coordinated control method for a wave power generation system provided by the present invention is described in detail below with reference to the accompanying drawings.

[0037] See also Figure 1 , which shows a flow chart of a coordinated control method of a wave power generation system provided by an embodiment of the present invention, specifically comprising:

[0038] Step S1: obtaining the wave height value and wave period value in real time; obtaining the initial air displacement and initial buoyancy value of the power generation system.

[0039] In one embodiment of the present invention, a TWS-310 wave sensor is used to obtain wave height values ​​and wave period values, and the acquisition frequency is 20Hz, which provides a basis for subsequent data analysis; in the wave power generation system, a buoyancy control module, a wave sensor and a data integration feedback analysis module corresponding to the air displacement are configured; the data integration feedback analysis module collects data from the wave sensor, and feeds back to the buoyancy control module after analysis to control the air displacement; the buoyancy control module corresponds to an air compressor and an air storage tank, the solenoid valve group is connected to the compressor and the air storage tank, and an air pipeline is arranged to ensure that the air displacement can be quickly adjusted; the power of the air compressor is 1-5kw, and the maximum working pressure is 10bar; the response time of the solenoid valve group is less than 50ms, and the pressure range is 0-10bar; the capacity of the air storage tank is 50-200L, and the pressure resistance is 10bar.

[0040] In order to facilitate the subsequent analysis of the relationship between buoyancy and air displacement, the air displacement at the current moment is adjusted, and the initial air displacement and initial buoyancy value of the power generation system are obtained here.

[0041] It should be noted that, in one embodiment of the present invention, the initial air displacement and the initial buoyancy value are both minimum values ​​when the wave power generation system is working, that is, the minimum air displacement and the minimum buoyancy value. The specific parameters can be found in the design description of the wave power generation system and are not limited here.

[0042] Step S2: According to the fluctuation characteristics of the wave height value in the preset historical neighborhood at the current time point, the wave height stability parameter at the current time point is obtained; according to the concentrated characteristics of the wave period value in the preset historical neighborhood at the current time point, the wave period stability parameter at the current time point is obtained; the wave height stability parameter and the wave period stability parameter at the current time point are integrated to obtain the environmental stability parameter at the current time point; the wave height stability parameter and the wave period stability parameter are both positively correlated with the environmental stability parameter; according to the environmental stability parameter at the current time point, combined with the initial buoyancy value, the corrected buoyancy value at the current time point is obtained.

[0043] Taking into account the different fluctuation characteristics of sea surface waves in different time periods, the analysis is carried out within the preset historical neighborhood at the current time point; taking into account that the wave height and wave period of sea surface waves reflect the stability of the sea surface environment, the stability of the environment is analyzed from the two perspectives of wave height value and wave period value, respectively, and then the two analysis perspectives are integrated to jointly represent the stable characteristics of the environment, so according to the fluctuation characteristics of the wave height value in the preset historical neighborhood at the current time point, the wave height stability parameter at the current time point is obtained; according to the concentrated characteristics of the wave period value in the preset historical neighborhood at the current time point, the wave period stability parameter at the current time point is obtained; the wave height stability parameter and the wave period stability parameter at the current time point are integrated to obtain the environmental stability parameter at the current time point; the wave height stability parameter and the wave period stability parameter are both positively correlated with the environmental stability parameter.

[0044] Preferably, in one embodiment of the present invention, the method for obtaining wave height stability parameters comprises: Figure 2 , which shows a flow chart of a method for obtaining wave height stability parameters provided by an embodiment of the present invention, specifically comprising:

[0045] Step S201: segmenting a preset historical neighborhood of the current time point according to a preset time window to obtain multiple historical time periods.

[0046] Considering that segmenting the data can more easily capture the local detail characteristics of the data, more accurately reflect the fluctuation characteristics of the data, and improve the accuracy of the analysis results, the preset historical neighborhood of the current time point is segmented according to the preset time window to obtain multiple historical time periods.

[0047] Step S202: Obtain the wave height stability sub-parameter of each historical time period according to the fluctuation stability of the wave height value and the concentrated characteristics of the wave height value in each historical time period.

[0048] Among them, the fluctuation stability of wave height values ​​and the concentrated characteristics of wave height values ​​are positively correlated with the wave height stability sub-parameter.

[0049] Considering that the more stable the fluctuation of wave height values ​​is, the more concentrated it is at lower wave height values, which means that the waves on the sea surface are gentler, the more regular the fluctuation is, and the stronger the stability of wave height is, so according to the fluctuation stability of wave height values ​​and the concentrated characteristics of wave height values ​​in each historical time period, the wave height stability sub-parameter of each historical time period is obtained; the fluctuation stability of wave height values ​​and the concentrated characteristics of wave height values ​​are both positively correlated with the wave height stability sub-parameter;

[0050] As an example, the length of the preset historical neighborhood is 10 minutes, and the end point of the preset historical neighborhood is the current time point; the length of the preset time window is 1 minute; the fluctuation stability of the wave height value is analyzed by variance, the smaller the variance, the stronger the fluctuation stability, and the larger the wave height stability sub-parameter; the concentration characteristics of the wave height value are represented by the average value, the larger the average value of the wave height value, the larger the overall value of the wave height value, the more unstable the sea surface, and the smaller the wave height stability sub-parameter; the product of the variance of the wave height value in the historical time period and the average value of the wave height value is summed with the preset positive constant 1 divided by zero and the inverse is taken as the wave height stability sub-parameter of the corresponding historical time period.

[0051] As another example, the fluctuation stability of the wave height value can also be represented by the Mean Absolute Deviation (MAD). The smaller the absolute mean deviation value, the stronger the fluctuation stability and the larger the wave height stability sub-parameter, which can be used to replace the variance to obtain the wave height stability sub-parameter. The concentrated characteristics of the wave height value can also be represented by the weighted sum of the mean, median and mode of the wave height value, such as , replace the average value to obtain the wave height stable sub-parameter. You can also use the negative correlation function such as Replace the inverse method to perform negative correlation mapping, where Indicated by natural constant is the exponential function of the base, Represents the independent variable.

[0052] Step S203: Fusing the wave height stability sub-parameters of all historical time periods corresponding to the current time point to obtain the wave height stability parameter of the current time point.

[0053] After obtaining the wave height stability sub-parameters for each historical time period, all historical time periods corresponding to the current time point can be analyzed comprehensively to obtain the wave height stability parameters at the current time point.

[0054] As an example, the average value of the wave height stability sub-parameters of all historical time periods corresponding to the current time point is used as the wave height stability parameter at the current time point.

[0055] It should be noted that MAD is a technical means well known to those skilled in the art and will not be described in detail here; in other embodiments of the present invention, the implementer sets other preset historical neighborhoods and preset time windows.

[0056] Preferably, in one embodiment of the present invention, considering that the larger the wave period value at all time points in the historical time period is, the larger the period of the sea surface waves is, reflecting that the wave fluctuation is gentler and the sea surface environment is more stable, so at least according to the average value of the wave period value at all time points in the historical time period, the wave period stability sub-parameter of each historical time period is obtained; the average value of the wave period value at all time points in the historical time period is positively correlated with the wave period stability sub-parameter;

[0057] As an example, the concentrated characteristics of the wave period value are represented by the average value. The larger the average value of the wave period value is, the larger the overall value of the wave period value is, the lower the frequency of sea surface wave changes is, and the more stable the sea surface is. Therefore, the average value of the wave period values ​​at all time points in the historical time period is used as the wave period stability sub-parameter of the corresponding historical time period.

[0058] As another example, the concentrated characteristics of the wave period values ​​can also be expressed by weighted sum of the mean, median and mode of the wave period values, such as , replace the average value to obtain the wave cycle stability sub-parameter. The variance or MAD parameter can also be combined to express the degree of aggregation of the wave cycle value. The smaller the variance or MAD parameter, the more aggregated the wave cycle value. The sum of the variance or MAD parameter of the wave cycle value and the preset positive constant 1 divided by zero is used as the denominator, the average value of the wave cycle value is used as the numerator, and the fraction ratio is used as the wave cycle stability sub-parameter of the corresponding historical time period.

[0059] The wave cycle stability sub-parameters of all historical time periods corresponding to the current time point are integrated to obtain the wave cycle stability parameter of the current time point.

[0060] Preferably, in one embodiment of the present invention, in order to control the wave period stability parameter and the wave height stability parameter to be of the same order of magnitude, the wave period stability sub-parameters are normalized, and the sum of the normalized wave period stability sub-parameters of all historical time periods corresponding to the current time point is used as the wave period stability parameter of the current time point.

[0061] Preferably, in one embodiment of the present invention, considering that the larger the wave height stability parameter is, the more stable the wave height in the preset historical neighborhood at the current time point is, which indicates the stable characteristics of the sea surface environment from the perspective of wave height stability; the larger the wave period stability parameter is, the larger the wave period in the preset historical neighborhood at the current time point is, which indicates the stable characteristics of the sea surface environment from the perspective of wave period stability, so the wave height stability parameter and the wave period stability parameter at the current time point are weighted and summed, and the weighted sum result is used as the environmental stability parameter at the current time point.

[0062] As an example, the wave height stability parameter has a weight of 0.6 and the wave period stability parameter has a weight of 0.4.

[0063] In other embodiments of the present invention, the implementer may also set other weighted weights; the product of the wave height stability parameter and the wave period stability parameter may also be normalized by a linear normalization function, and the normalized result may be used as the environmental stability parameter at the current time point.

[0064] After characterizing the environmental stability characteristics of the current time through the environmental stability parameters at the current time, the wave power generation system can be adaptively adjusted according to the current environmental stability characteristics. Therefore, according to the environmental stability parameters at the current time point and the initial buoyancy value, the corrected buoyancy value at the current time point is obtained, and the buoyancy value required at the current time point is determined, providing a basis for subsequent control of air displacement.

[0065] Preferably, in one embodiment of the present invention, the environmental stability parameter at the current time point is negatively correlated and mapped to a preset adjustment interval as the buoyancy adjustment coefficient;

[0066] The product of the initial buoyancy value and the buoyancy adjustment coefficient is used as the buoyancy adjustment value; the sum of the buoyancy adjustment value and the initial buoyancy value is used as the corrected buoyancy value at the current time point.

[0067] As an example, the preset adjustment interval is [0,1], that is, the corrected buoyancy value is greater than or equal to the initial buoyancy value, and less than or equal to 2 times the initial buoyancy value. The calculation formula for the corrected buoyancy value includes:

[0068] ;in, Indicates the corrected buoyancy value at the current time point; represents the linear normalization function; Indicates a positive constant that divides by zero. In this example ; Indicates the environmental stability parameter at the current time point; Indicates the initial buoyancy value.

[0069] In the calculation formula of the corrected buoyancy value, negative correlation mapping is performed by taking the reciprocal, and the sum of the environmental stability parameter at the current time point and the preset positive constant 1 divided by zero is taken the reciprocal, and then linearly normalized and mapped to the preset adjustment range; the formula can be transformed into , Indicates the buoyancy adjustment value. As the buoyancy adjustment coefficient; the larger the environmental stability parameter is, the more stable the sea surface environment is, the steadier the waves are, the less wave energy is, and the less buoyancy is required. Therefore, the smaller the buoyancy adjustment value is, the smaller the buoyancy adjustment coefficient is, and the smaller the corrected buoyancy value is.

[0070] In other embodiments of the present invention, the implementer may also set other preset adjustment intervals, using a negative correlation function such as Replace the inverse method to perform negative correlation mapping.

[0071] It should be noted that the corrected buoyancy value does not exceed the maximum buoyancy value of the wave power generation system. When the corrected buoyancy value is greater than the maximum buoyancy value, the corrected buoyancy value is set to the maximum buoyancy value. The maximum buoyancy value can be obtained through the design description of the wave power generation system and is no longer limited here.

[0072] Step S3: According to the corrected buoyancy value at the current time point, combined with the initial air displacement and the initial buoyancy value, the air displacement of the wave power generation system at the current time point is controlled.

[0073] The corrected buoyancy value at the current time point represents the buoyancy parameter adapted to the current sea surface wave environment. The air displacement of the wave power generation system needs to be adjusted to adapt to the current sea surface wave environment and improve the power generation efficiency and stability of the wave power generation system. Considering that the initial air displacement and the initial buoyancy value reflect the corresponding relationship between the air displacement and the buoyancy value, the air displacement of the wave power generation system at the current time point is controlled according to the corrected buoyancy value at the current time point, combined with the initial air displacement and the initial buoyancy value.

[0074] Preferably, in one embodiment of the present invention, the buoyancy value per unit air displacement is obtained based on the initial air displacement and the initial buoyancy value; the corrected air displacement at the current time point is obtained based on the corrected buoyancy value at the current time point and the buoyancy value per unit air displacement; and the air displacement of the wave power generation system is adjusted to the corrected air displacement.

[0075] As an example, the ratio of the initial buoyancy value to the initial air displacement is used as the buoyancy value per unit air displacement, wherein the initial air displacement is the denominator; the ratio of the corrected buoyancy value to the buoyancy value per unit air displacement is used as the corrected air displacement at the current time point, wherein the ratio of the buoyancy value per unit air displacement is the denominator.

[0076] It should be noted that, in another embodiment of the present invention, taking into account that the buoyancy value and the air displacement may not change linearly due to the equipment design in the wave power generation system, a buoyancy value-air displacement change curve can be obtained in advance, and a corrected air displacement can be obtained based on the buoyancy value-air displacement change curve and the corrected buoyancy value at the current time point; the air displacement of the wave power generation system is adjusted to the corrected air displacement.

[0077] It should be noted that, in one embodiment of the present invention, taking into account that the adjustment of the air displacement takes time and too frequent adjustment of the air displacement will cause excessive wear and tear on the hardware of the buoyancy control module, it is set to calculate the corrected air displacement once per minute, and then adjust the air displacement once per minute; in other embodiments of the present invention, the implementer may also set a longer adjustment cycle, such as adjusting the air displacement once every 10 minutes.

[0078] In summary, in view of the problem that the fixed parameter setting of the traditional wave power generation system leads to low power generation efficiency, the present invention proposes a collaborative control method for the wave power generation system. The present invention first obtains the wave height value and the wave period value in real time; obtains the initial air displacement and the initial buoyancy value of the power generation system; further obtains the wave height stability parameter at the current time point according to the fluctuation characteristics of the wave height value in the preset historical neighborhood at the current time point; further obtains the wave period stability parameter at the current time point according to the concentration characteristics of the wave period value in the preset historical neighborhood at the current time point; further integrates the wave height stability parameter and the wave period stability parameter at the current time point to obtain the environmental stability parameter at the current time point; further obtains the corrected buoyancy value at the current time point according to the environmental stability parameter at the current time point, combined with the initial buoyancy value; finally, according to the corrected buoyancy value at the current time point, combined with the initial air displacement and the initial buoyancy value, controls the air displacement of the wave power generation system at the current time point. The present invention analyzes the real-time environmental stability characteristics from the two perspectives of wave height and wave period, and adjusts the buoyancy value and air displacement of the wave power generation system according to the real-time environmental stability characteristics, so as to better adapt to the current sea surface wave environment and improve the power generation efficiency and stability of the wave power generation system.

[0079] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0080] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A coordinated control method for a wave power generation system, characterized in that: The method comprises: Obtain wave height and wave period values ​​in real time; obtain initial air displacement and initial buoyancy values ​​of the power generation system; According to the fluctuation characteristics of the wave height value in the preset historical neighborhood at the current time point, the wave height stability parameter at the current time point is obtained; according to the concentrated characteristics of the wave period value in the preset historical neighborhood at the current time point, the wave period stability parameter at the current time point is obtained; the wave height stability parameter at the current time point and the wave period stability parameter are integrated to obtain the environmental stability parameter at the current time point; the wave height stability parameter and the wave period stability parameter are both positively correlated with the environmental stability parameter; according to the environmental stability parameter at the current time point, combined with the initial buoyancy value, the corrected buoyancy value at the current time point is obtained; According to the corrected buoyancy value at the current time point, in combination with the initial air displacement and the initial buoyancy value, controlling the air displacement of the wave power generation system at the current time point; The method for obtaining the wave height stability parameter comprises: According to the preset time window, the preset historical neighborhood of the current time point is segmented to obtain multiple historical time periods; According to the fluctuation stability of the wave height values ​​in each of the historical time periods and the concentrated characteristics of the wave height values, a wave height stability sub-parameter is obtained for each of the historical time periods; the fluctuation stability of the wave height values ​​and the concentrated characteristics of the wave height values ​​are both positively correlated with the wave height stability sub-parameter; The wave height stability sub-parameters of all the historical time periods corresponding to the current time point are integrated to obtain the wave height stability parameter at the current time point; The method for obtaining the wave period stability parameter comprises: At least according to the average value of the wave period values ​​at all time points in the historical time period, the wave period stability sub-parameter of each historical time period is obtained; the average value of the wave period values ​​at all time points in the historical time period is positively correlated with the wave period stability sub-parameter; The wave cycle stability sub-parameters of all the historical time periods corresponding to the current time point are integrated to obtain the wave cycle stability parameter of the current time point; The method for obtaining the corrected buoyancy value comprises: The environmental stability parameter at the current time point is negatively correlated and mapped to a preset adjustment interval as a buoyancy adjustment coefficient; The product of the initial buoyancy value and the buoyancy adjustment coefficient is used as the buoyancy adjustment value; the sum of the buoyancy adjustment value and the initial buoyancy value is used as the corrected buoyancy value at the current time point; The method for controlling the air displacement of the wave power generation system at the current time point according to the corrected buoyancy value at the current time point, in combination with the initial air displacement and the initial buoyancy value, comprises: According to the initial air displacement and the initial buoyancy value, the buoyancy value per unit air displacement is obtained; according to the corrected buoyancy value at the current time point and the buoyancy value per unit air displacement, the corrected air displacement at the current time point is obtained; and the air displacement of the wave power generation system is adjusted to the corrected air displacement.

2. A coordinated control method for a wave power generation system according to claim 1, characterized in that: The method of fusing the wave height stability sub-parameters of all the historical time periods corresponding to the current time point to obtain the wave height stability parameter at the current time point comprises: The average value of the wave height stability sub-parameters of all the historical time periods corresponding to the current time point is used as the wave height stability parameter at the current time point.

3. A coordinated control method for a wave power generation system according to claim 1, characterized in that: The method of fusing the wave cycle stability sub-parameters of all the historical time periods corresponding to the current time point to obtain the wave cycle stability parameter at the current time point includes: The wave cycle stability sub-parameter is normalized, and the sum of the normalized wave cycle stability sub-parameters of all the historical time periods corresponding to the current time point is used as the wave cycle stability parameter of the current time point.

4. A coordinated control method for a wave power generation system according to claim 1, characterized in that: The method for obtaining the environmental stability parameter includes: The wave height stability parameter and the wave period stability parameter at the current time point are weighted and summed, and the weighted sum result is used as the environmental stability parameter at the current time point.

5. The coordinated control method of a wave power generation system according to claim 1, characterized in that: The length of the preset historical neighborhood is 10 minutes, and the end point of the preset historical neighborhood is the current time point.

6. A coordinated control method for a wave power generation system according to claim 5, characterized in that: The length of the preset time window is 1 minute.

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