CN112365026B - Method and device for optimizing pitch of wave energy power generation device - Google Patents
Method and device for optimizing pitch of wave energy power generation device Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
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- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
- F03B13/16—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
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- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Abstract
The application discloses a method and a device for optimizing the pitch of a wave energy power generation device, wherein the method comprises the following steps: setting ocean environment parameters of a target area, and calculating a wave energy spectrum according to the ocean environment parameters of the target area; according to the wave energy spectrum of the target area and the geometric parameters of the wave energy power generation device, calculating to obtain the hydrodynamic coefficient of the wave energy power generation device; calculating to obtain a time average value of the total power generation power of the wave power generation device in the target area under physical constraint according to the hydrodynamic coefficient and a spectrum method; and optimizing the size parameter and the pitch parameter of the floater in the wave energy power generation device according to the time average value of the total power generation of the wave energy power generation device by adopting an optimization algorithm to obtain the optimal size parameter and the optimal pitch parameter of the floater in the wave energy power generation device when the total power generation of the wave energy power generation device is maximum. The wave energy capturing efficiency of the wave energy power generation device can be effectively improved.
Description
Technical Field
The application relates to the technical field of wave energy power generation, in particular to a method and a device for optimizing the pitch of a wave energy power generation device.
Background
The world energy crisis is becoming more and more serious, and people aim at the ocean in a dispute. Ocean occupies 71% of global surface area and stores huge energy, wherein wave energy is one of the main existence forms of ocean energy, and the ocean energy has the advantages of huge reserves, cleanness, reproducibility and the like and is considered to be a new direction for solving the energy problem. The wave energy resources in China are considerable, the energy flow density in the offshore area is high, the content of wave energy reaches about 1.5 hundred million kW, the development and utilization amount is about 2300-3500 ten thousand kW, and the development prospect is quite wide. Another important indicator for evaluating energy is fluence. Energy density refers to the energy or power of a certain energy source that can be obtained per unit area (e.g., square meter) or generated per unit weight (e.g., kilogram) of energy source within a certain spatial range. Wave energy has a high fluence.
At present, the existing wave energy power generation device optimizing method is optimizing the whole row of wave energy conversion devices based on differential evolution, but the existing wave energy power generation device optimizing method cannot acquire optimal pitch data, so that the wave energy capturing efficiency of the wave energy power generation device is low.
Disclosure of Invention
The application provides a method and a device for optimizing the pitch distance of a wave energy power generation device, which are used for solving the technical problem that the wave energy capturing efficiency of the wave energy power generation device is low because the optimal pitch distance cannot be obtained in the prior art.
The first embodiment of the application provides a method for optimizing the pitch of a wave energy power generation device, which comprises the following steps:
setting ocean environment parameters according to sea conditions and local terrains of a target area, and calculating wave energy spectrums according to the ocean environment parameters; wherein the marine environmental parameters include: effective wave height and period in the case of irregular waves or wave height and period in the case of regular waves;
according to the wave energy spectrum and the geometric parameters of the wave energy power generation device in the target area, calculating to obtain the hydrodynamic coefficient of the wave energy power generation device;
solving an optimal control quantity of an energy conversion system of the wave energy power generation device under a constraint condition according to the hydrodynamic coefficient and the spectrum method, and calculating to obtain a time average value of total power generation power of the wave energy power generation device in the target area under physical constraint by adopting the optimal control quantity;
and optimizing the size parameter and the pitch parameter of the floater in the wave power generation device according to the time average value of the total power generation of the wave power generation device by adopting an optimization algorithm to obtain the optimal size parameter and the optimal pitch parameter of the floater in the wave power generation device when the total power generation of the wave power generation device is maximum.
Further, according to the hydrodynamic coefficient and the spectrum method, solving an optimal control quantity of an energy conversion system of the wave energy power generation device under a constraint condition, and calculating to obtain a time average value of total power generation power of the wave energy power generation device in the target area under physical constraint by adopting the optimal control quantity, wherein the time average value is specifically as follows:
the method comprises the steps of approximating the state quantity of the wave energy power generation device and the control quantity of the energy conversion system by utilizing a basis function, substituting the hydrodynamic coefficient into a continuous motion equation, discretizing the continuous motion equation, converting the problem of solving the control variable of the energy conversion system into a standard optimization problem, simultaneously solving the global optimal value of the control quantity of the energy conversion system meeting the physical constraint condition by combining the physical constraint condition of the wave energy power generation device, and calculating the time average value of the total power generation of the wave energy power generation field according to the global optimal value.
Further, according to the wave energy spectrum and the geometric parameters of the wave energy power generation device in the target area, the hydrodynamic coefficient of the wave energy power generation device is calculated, and specifically: and calculating to obtain a hydrodynamic coefficient according to the marine environment parameters and the geometric parameters of the wave power generation device by utilizing the hydrodynamic analysis software AQWA.
Further, the basis functions used by the spectral method include, but are not limited to, fourier basis functions
Further, an optimization algorithm is adopted, and the size parameter and the pitch parameter of the floater in the wave energy power generation device are optimized according to the time average value of the total power generation of the wave energy power generation device, so that when the total power generation of the wave energy power generation device is maximum, the optimal size parameter and the optimal pitch parameter of the floater in the wave energy power generation device are specifically:
and obtaining the minimum value of the function under the constraint condition according to an optimization algorithm, namely the optimal total power of the wave power generation device, and obtaining the optimal size parameter and the optimal pitch parameter of the wave power generation device floater corresponding to the optimal total power.
A second embodiment of the present application provides a wave power generation device pitch optimization device, comprising: the device comprises a first computing module, a setting module, a second computing module and an optimizing module;
the first calculation module is used for setting ocean environment parameters according to sea conditions and local terrains of a target area and calculating wave energy spectrums according to the ocean environment parameters; wherein the marine environmental parameters include: effective wave height and period in the case of irregular waves or wave height and period in the case of regular waves;
the setting module is used for calculating the hydrodynamic coefficient of the wave energy power generation device according to the wave energy spectrum and the geometric parameters of the wave energy power generation device in the target area;
the second calculation module is used for solving the optimal control quantity of the energy conversion system of the wave energy power generation device under the consideration and constraint conditions according to the hydrodynamic coefficient and the spectral method, and calculating the time average value of the total power generation power of the wave energy power generation device in the target area under the physical constraint by adopting the optimal control quantity;
the optimizing module is used for optimizing the size parameter and the pitch distance parameter of the floater in the wave power generation device according to the time average value of the total power generation of the wave power generation device by adopting an optimizing algorithm to obtain the optimal size parameter and the optimal pitch distance parameter of the floater in the wave power generation device when the total power generation of the wave power generation device is maximum.
Further, the second computing module is specifically configured to:
the method comprises the steps of approximating the state quantity of the wave energy power generation device and the control quantity of the energy conversion system by utilizing a basis function, substituting the hydrodynamic coefficient into a continuous motion equation, discretizing the continuous motion equation, converting the problem of solving the control variable of the energy conversion system into a standard optimization problem, simultaneously solving the global optimal value of the control quantity of the energy conversion system meeting the physical constraint condition by combining the physical constraint condition of the wave energy power generation device, and calculating the time average value of the total power generation of the wave energy power generation field according to the global optimal value.
Further, the setting module is specifically configured to: and calculating to obtain a hydrodynamic coefficient according to the marine environment parameters and the geometric parameters of the wave power generation device by utilizing the hydrodynamic analysis software AQWA.
Further, the basis functions used by the spectral method include, but are not limited to, fourier basis functions.
Further, an optimization algorithm is adopted, and the size parameter and the pitch parameter of the floater in the wave energy power generation device are optimized according to the time average value of the total power generation of the wave energy power generation device, so that when the total power generation of the wave energy power generation device is maximum, the optimal size parameter and the optimal pitch parameter of the floater in the wave energy power generation device are specifically:
and obtaining the minimum value of the function under the constraint condition according to an optimization algorithm, namely the optimal total power of the wave power generation device, and obtaining the optimal size parameter and the optimal pitch parameter of the wave power generation device floater corresponding to the optimal total power.
The application provides an internode distance optimization method and device for a wave energy power generation device, which are used for solving the optimal control quantity of an energy conversion system of the wave energy power generation device under the consideration and constraint conditions according to hydrodynamic coefficients and a spectrum method, obtaining the time average value of the total power generation power of the wave energy power generation device in a target area under the physical constraint by adopting the optimal control quantity, optimizing by utilizing an optimization algorithm, and obtaining the optimal size parameter and the optimal internode distance parameter of a floater under the condition that the total power output of wave energy is maximum, thereby effectively improving the wave energy capturing efficiency of the wave energy power generation device.
Drawings
FIG. 1 is a schematic flow chart of a method for optimizing the pitch of a wave energy power generation device according to an embodiment of the present application;
FIG. 2 is another schematic flow chart of a method for optimizing the pitch of a wave energy power generation device according to an embodiment of the present application;
FIG. 3 is a schematic illustration of the size and pitch of a float in a wave power device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an internode spacing optimizing device of a wave power generation device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
Referring to fig. 1-3, in a first embodiment of the present application, there is provided a method for optimizing the pitch of a wave power plant as shown in fig. 1, comprising:
s1, setting ocean environment parameters according to sea conditions and local terrains of a target area, and calculating wave energy spectrum according to the ocean environment parameters; wherein the marine environmental parameters include: effective wave height and period in the case of irregular waves or wave height and period in the case of regular waves;
s2, calculating to obtain the hydrodynamic coefficient of the wave energy power generation device according to the wave energy spectrum and the geometric parameters of the wave energy power generation device in the target area;
in the embodiment of the application, the parameter to be optimized of the floater in the wave power generation device is used as an initial variable for outer layer optimization. The parameters to be optimized of the outer layer include the relevant parameters of the float size L and the internode distance D between floats. In a specific embodiment, the float is uniformly rectangular in shape. Referring to fig. 3, regarding the size of the float, only the length variable of the size of the float is considered and the width variable of the size is not considered under the two-dimensional space condition, namely L1, L2 as shown in fig. 3; the pitch parameter of a float is the distance d between two adjacent floats.
S3, solving the optimal control quantity of an energy conversion system of the wave energy power generation device under the consideration of constraint conditions according to the hydrodynamic coefficient and a spectrum method, and obtaining the time average value of the total power generation power of the wave energy power generation device in the target area under the physical constraint by adopting the optimal control quantity;
and S4, optimizing the size parameter and the pitch parameter of the floater in the wave energy power generation device according to the time average value of the total power generation of the wave energy power generation device by adopting an optimization algorithm, and obtaining the optimal size parameter and the optimal pitch parameter of the floater in the wave energy power generation device when the total power generation of the wave energy power generation device is maximum.
According to the embodiment of the application, the optimal control quantity of the energy conversion system of the wave energy power generation device under the consideration of the constraint condition is solved according to the hydrodynamic coefficient and the spectral method, the time average value of the total power generation power of the wave energy power generation device in the target area under the physical constraint is obtained by adopting the optimal control quantity, and the optimal size parameter and the optimal pitch parameter of the floater under the condition of maximum total power output of the wave energy are obtained by optimizing by utilizing an optimization algorithm, so that the wave energy capturing efficiency of the wave energy power generation device is effectively improved.
As a specific implementation manner of the embodiment of the application, the ocean power environment parameters are set according to the actual sea conditions of the target area, and the ocean power environment parameters can be the wave height and the wave period of regular waves or the effective wave height H of irregular waves s Average wave period T av . The expression for calculating the wave energy spectrum from the effective wave height and the average wave period is:
f＝1/T av wherein A is s B is the quantity related to the effective wave height and average period s The quantity related to the fourth power of the average period, f is the frequency.
As a specific implementation manner of the embodiment of the present application, according to a hydrodynamic coefficient and a spectral method, an optimal control amount of an energy conversion system of a wave energy power generation device under a constraint condition is solved, and a time average value of total power generation power of the wave energy power generation device in a target area under physical constraint is obtained by adopting the optimal control amount, which specifically comprises:
the method comprises the steps of approximating the state quantity of the wave energy power generation device and the control quantity of the energy conversion system by using a basis function, substituting a hydrodynamic coefficient into a continuous motion equation, discretizing the continuous motion equation, converting a solving problem of a control variable of the energy conversion system into a standard optimization problem, simultaneously combining physical constraint conditions of the wave energy power generation device, solving a global optimal value of the control quantity of the energy conversion system meeting the physical constraint conditions, and calculating a time average value of total power generation of the wave energy power generation field according to the global optimal value.
In the embodiment of the application, the obtained hydrodynamic coefficient is substituted into a continuous motion equation, and the motion equation can be obtained after the hydrodynamic coefficient is discretized by using a spectrum methodWhen considering the physical constraints of maximum displacement, maximum velocity, maximum control force, the objective function, i.e. the total average power, is calculated by the following formula:
wherein, the liquid crystal display device comprises a liquid crystal display device,
wherein, the liquid crystal display device comprises a liquid crystal display device, the corresponding coefficients of displacement, speed and energy conversion system control force and excitation force in the spectrum method are respectively; x is X max ，V max ，U max Is the physical constraint of maximum displacement, maximum velocity, maximum control force considered. />A constraint is represented. The basis functions used by the spectral method include, but are not limited to, fourier basis functions.
In the calculation process, in the optimized objective functionInner control force expansion coefficient->Displacement expansion coefficient->Are all equal to the velocity expansion coefficient->There is a relationship so that the objective function can be regarded as reduced and then expanded by the velocity expansion coefficient +.>As an independent variable, the negative value +.o of the time average value of the total generated power output by the whole device>Is an optimization function of the dependent variable.
Under the condition that the constraint condition is met, the optimization algorithm is utilized to calculateThe minimum value of the values, and outputting the corresponding speed expansion coefficient +.>By means of the equation of motion->Solving the control force expansion coefficient of the energy conversion system>And obtaining the optimal control force corresponding to the wave energy power generation device in the power generation field.
In an embodiment of the application, an objective function is calculatedThe absolute value of (a) is the time average value of the total power output by the whole power generation place. As a specific implementation manner of the embodiment of the application, an optimization algorithm is adopted, and the size parameter and the pitch parameter of the floater in the wave power generation device are optimized according to the time average value of the total power generation of the wave power generation device, so that when the total power generation of the wave power generation device is maximum, the optimal size parameter and the optimal pitch parameter of the floater in the wave power generation device are obtained, specifically:
and obtaining the minimum value of the function under the constraint condition, and obtaining the optimal total power of the wave power generation device, wherein the optimal total power corresponds to the optimal size parameter and the optimal pitch parameter of the floater in the wave power generation device.
The embodiment of the application has the following beneficial effects:
according to the embodiment of the application, the optimal control quantity of the energy conversion system of the wave energy power generation device under the consideration of the constraint condition is solved according to the hydrodynamic coefficient and the spectral method, the time average value of the total power generation power of the wave energy power generation device in the target area under the physical constraint is obtained by adopting the optimal control quantity, and the optimal size parameter and the optimal pitch parameter of the floater under the condition of maximum total power output of the wave energy are obtained by optimizing by utilizing an optimization algorithm, so that the wave energy capturing efficiency of the wave energy power generation device is effectively improved.
Referring to fig. 4, in a second embodiment of the present application, there is provided an internode distance optimizing apparatus for a wave power generation apparatus, comprising: a first calculation module 10, a setting module 20, a second calculation module 30 and an optimization module 40;
a first calculation module 10 for setting ocean environment parameters according to sea conditions and local terrains of a target area, and calculating a wave energy spectrum according to the ocean environment parameters; wherein the marine environmental parameters include: effective wave height and period in the case of irregular waves or wave height and period in the case of regular waves;
a setting module 20, configured to calculate a hydrodynamic coefficient of the wave energy power generation device according to the wave energy spectrum and the geometric parameters of the wave energy power generation device in the target area;
in the embodiment of the application, the parameter to be optimized of the floater in the wave power generation device is used as an initial variable for outer layer optimization. The parameters to be optimized of the outer layer include the relevant parameters of the float size L and the internode distance D between floats. In a specific embodiment, the float is uniformly rectangular in shape. Referring to fig. 3, regarding the size of the float, only the length variable of the size of the float is considered, and the width variable of the size is not considered, and L1, L2 are shown in fig. 3 under the two-dimensional space condition; the pitch parameter for a float is the distance d between two adjacent floats.
The second calculation module 30 is configured to solve an optimal control amount of the energy conversion system of the wave energy power generation device under consideration and constraint conditions according to the hydrodynamic coefficient and the spectral method, and calculate a time average value of total power generation power of the wave energy power generation device in the target area under physical constraint by using the optimal control amount;
the optimizing module 40 is configured to optimize the size parameter and the pitch parameter of the float in the wave power generating device according to the time average value of the total power generated by the wave power generating device by using an optimizing algorithm, so as to obtain the optimal size parameter and the optimal pitch parameter of the float in the wave power generating device when the total power generated by the wave power generating device is maximum.
According to the embodiment of the application, the optimal control quantity of the energy conversion system of the wave energy power generation device under the consideration of the constraint condition is solved according to the hydrodynamic coefficient and the spectral method, the time average value of the total power generation power of the wave energy power generation device in the target area under the physical constraint is obtained by adopting the optimal control quantity, and the optimal size parameter and the optimal pitch parameter of the floater under the condition of maximum total power output of the wave energy are obtained by optimizing by utilizing an optimization algorithm, so that the wave energy capturing efficiency of the wave energy power generation device is effectively improved.
As a specific implementation of the embodiment of the present application, one specific implementation of the first calculation module 10 calculating the corresponding wave energy spectrum is:
setting ocean power environment parameters according to the actual sea conditions of a target area, wherein the ocean power environment parameters can be wave heights and wave periods of regular waves or effective wave heights H of irregular waves s Average wave period T av . The expression for calculating the wave energy spectrum from the effective wave height and the average wave period is:
f＝1/T av wherein A is s B is the quantity related to the effective wave height and average period s The quantity related to the fourth power of the average period, f is the frequency.
As a specific implementation of the embodiment of the present application, the second computing module 30 is specifically configured to:
the method comprises the steps of approximating the state quantity of the wave energy power generation device and the control quantity of the energy conversion system by using a basis function, substituting a hydrodynamic coefficient into a continuous motion equation, discretizing the continuous motion equation, converting a solving problem of a control variable of the energy conversion system into a standard optimization problem, simultaneously combining physical constraint conditions of the wave energy power generation device, solving a global optimal value of the control quantity of the energy conversion system meeting the physical constraint conditions, and calculating a time average value of total power generation of the wave energy power generation field according to the global optimal value.
In the embodiment of the application, the obtained hydrodynamic coefficient is substituted into a continuous motion equation, and the motion equation can be obtained after the hydrodynamic coefficient is discretized by using a spectrum methodWhen considering the physical constraints of maximum displacement, maximum velocity, maximum control force, the objective function, i.e. the total average power, is calculated by the following formula:
wherein, the liquid crystal display device comprises a liquid crystal display device,
wherein, the liquid crystal display device comprises a liquid crystal display device,the corresponding coefficients of displacement, speed and energy conversion system control force and excitation force in the spectrum method are respectively; x is X max ，V max ，U max Is the physical constraint of maximum displacement, maximum velocity, maximum control force considered. />A constraint is represented. The basis functions used by the spectral method include, but are not limited to, fourier basis functions.
In the calculation process, in the optimized objective functionInner control force expansion coefficient->Displacement expansion coefficient->Are all equal to the velocity expansion coefficient->There is a relationship so that the objective function can be regarded as reduced and then expanded by the velocity expansion coefficient +.>As an independent variable, the negative value +.o of the time average value of the total generated power output by the whole device>Is an optimization function of the dependent variable.
When the constraint condition is satisfied, findThe minimum value of the values, and outputting the corresponding speed expansion coefficient +.>By means of the equation of motion->Solving the control force expansion coefficient of the energy conversion system>And obtaining the optimal control force corresponding to the wave energy power generation device in the power generation field.
In an embodiment of the application, an objective function is calculatedThe absolute value of (a) is the time average value of the total power output by the whole power generation place. As a specific implementation of the embodiment of the present application, the optimization module 50 is specifically configured to:
and obtaining the minimum value of the function under the constraint condition by utilizing an optimization algorithm, so that the optimal total power of the wave energy power generation device can be obtained, wherein the optimal total power corresponds to the optimal size parameter and the optimal pitch parameter of the floater in the wave energy power generation device.
The embodiment of the application has the following beneficial effects:
according to the embodiment of the application, the optimal control quantity of the energy conversion system of the wave energy power generation device under the consideration of the constraint condition is solved according to the hydrodynamic coefficient and the spectral method, the time average value of the total power generation power of the wave energy power generation device in the target area under the physical constraint is obtained by adopting the optimal control quantity, and the optimal size parameter and the optimal pitch parameter of the floater under the condition of maximum total power output of the wave energy are obtained by optimizing by utilizing an optimization algorithm, so that the wave energy capturing efficiency of the wave energy power generation device is effectively improved.
The foregoing is a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be comprehended within the scope of the present application.
Claims (6)
1. The method for optimizing the pitch of the wave energy power generation device is characterized by comprising the following steps of:
setting ocean environment parameters according to sea conditions and local terrains of a target area, and calculating wave energy spectrums according to the ocean environment parameters; wherein the marine environmental parameters include: effective wave height and period in the case of irregular waves or wave height and period in the case of regular waves;
according to the wave energy spectrum and the geometric parameters of the wave energy power generation device in the target area, calculating to obtain the hydrodynamic coefficient of the wave energy power generation device;
solving an optimal control quantity of an energy conversion system of the wave energy power generation device under a constraint condition according to the hydrodynamic coefficient and the spectrum method, and calculating to obtain a time average value of total power generation power of the wave energy power generation device in the target area under physical constraint by adopting the optimal control quantity; the method for solving the optimal control quantity of the energy conversion system of the wave energy power generation device under the consideration and constraint conditions according to the hydrodynamic coefficient and the spectral method, and calculating the time average value of the total power generation power of the wave energy power generation device under the physical constraint in the target area by adopting the optimal control quantity comprises the following specific steps: approximating the state quantity of the wave energy power generation device and the control quantity of the energy conversion system by using a basis function, substituting the hydrodynamic coefficient into a continuous motion equation, discretizing the continuous motion equation, converting the problem of solving the control variable of the energy conversion system into a standard optimization problem, simultaneously combining the physical constraint condition of the wave energy power generation device, solving the global optimal value of the control quantity of the energy conversion system meeting the physical constraint condition, and calculating the time average value of the total power generation of the wave energy power generation device according to the global optimal value;
optimizing the size parameter and the pitch parameter of the floater in the wave power generation device according to the time average value of the total power generation of the wave power generation device by adopting an optimization algorithm to obtain the optimal size parameter and the optimal pitch parameter of the floater in the wave power generation device when the total power generation of the wave power generation device is maximum; the optimization algorithm is adopted to optimize the size parameter and the pitch parameter of the floater in the wave energy power generation device according to the time average value of the total power generation of the wave energy power generation device, so that when the total power generation of the wave energy power generation device is maximum, the optimal size parameter and the optimal pitch parameter of the floater in the wave energy power generation device are obtained, and the specific mode is as follows: and obtaining the minimum value of the function under the constraint condition according to an optimization algorithm, namely the optimal total power of the wave power generation device, and obtaining the optimal size parameter and the optimal pitch parameter of the wave power generation device floater corresponding to the optimal total power.
2. The method for optimizing the pitch of a wave power plant according to claim 1, wherein the hydrodynamic coefficients of the wave power plant are calculated according to the wave energy spectrum and the geometric parameters of the wave power plant in the target area, specifically: and calculating to obtain a hydrodynamic coefficient according to the marine environment parameters and the geometric parameters of the wave power generation device by utilizing the hydrodynamic analysis software AQWA.
3. The wave power plant pitch optimization method of claim 1, wherein the basis functions used by the spectral method comprise fourier basis functions.
4. An internode spacing optimizing device of a wave power generation device, characterized by comprising: the device comprises a first computing module, a setting module, a second computing module and an optimizing module;
the first calculation module is used for setting ocean environment parameters according to sea conditions and local terrains of a target area and calculating wave energy spectrums according to the ocean environment parameters; wherein the marine environmental parameters include: effective wave height and period in the case of irregular waves or wave height and period in the case of regular waves;
the setting module is used for calculating the hydrodynamic coefficient of the wave energy power generation device according to the wave energy spectrum and the geometric parameters of the wave energy power generation device in the target area;
the second calculation module is used for solving the optimal control quantity of the energy conversion system of the wave energy power generation device under the consideration and constraint conditions according to the hydrodynamic coefficient and the spectral method, and calculating the time average value of the total power generation power of the wave energy power generation device in the target area under the physical constraint by adopting the optimal control quantity; the method is particularly used for: approximating the state quantity of the wave energy power generation device and the control quantity of the energy conversion system by using a basis function, substituting the hydrodynamic coefficient into a continuous motion equation, discretizing the continuous motion equation, converting the problem of solving the control variable of the energy conversion system into a standard optimization problem, simultaneously combining the physical constraint condition of the wave energy power generation device, solving the global optimal value of the control quantity of the energy conversion system meeting the physical constraint condition, and calculating the time average value of the total power generation of the wave energy power generation device according to the global optimal value;
the optimizing module is used for optimizing the size parameter and the pitch parameter of the floater in the wave power generation device according to the time average value of the total power generation of the wave power generation device by adopting an optimizing algorithm to obtain the optimal size parameter and the optimal pitch parameter of the floater in the wave power generation device when the total power generation of the wave power generation device is maximum; the method is particularly used for: and obtaining the minimum value of the function under the constraint condition according to an optimization algorithm, namely the optimal total power of the wave power generation device, and obtaining the optimal size parameter and the optimal pitch parameter of the wave power generation device floater corresponding to the optimal total power.
5. The wave power plant pitch optimization apparatus of claim 4, wherein the setting module is specifically configured to: and calculating to obtain a hydrodynamic coefficient according to the marine environment parameters and the geometric parameters of the wave power generation device by utilizing the hydrodynamic analysis software AQWA.
6. The wave power plant inter-node distance optimizing apparatus of claim 4, wherein the basis functions used by the spectral method comprise fourier basis functions.
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