JP2021161990A - Wave power generation control method, wave power generation control device, wave power generation apparatus, and float - Google Patents

Abstract

To provide a technology for improving the performance of wave power generation.SOLUTION: This apparatus is a point absorber type or movable object type wave power generation apparatus, and includes a float which floats on the sea and is displaced by waves, a power generator for converting kinetic energy of the float into electric energy, and a wave power generation control device for controlling the float or the power generator. A wave power generation control method includes a step (S10, S12) for acquiring information on a marine event of a sea area with the wave power generation apparatus installed, and a step (S14, S16) for controlling a power generation mode of the wave power generation apparatus on the basis of a marine event information acquisition part for acquiring information on the marine event of the sea area with the wave power generation apparatus installed and information acquired by the marine event information acquisition part.SELECTED DRAWING: Figure 12

Description

The present disclosure relates to a wave power generation control technology, and more particularly to a wave power generation device, a wave power generation control method for controlling the wave power generation device, a wave power generation control device, and a float provided in the wave power generation device.

Research and development are underway to put wave power generation using offshore wave power into practical use. Various types of wave power generation are being studied, but they have not yet been put into practical use at present.

"Practical Problems of Output Power Maximization Control in Point Absorber Wave Power Generators and Their Solutions", Linear Drive Study Group, LD-16-128, pp. 87-92, 2016

In order to put wave power generation into practical use, it is necessary to reduce the power generation cost and further improve the power generation performance.

The present disclosure has been made in view of such issues, and an object thereof is to improve the performance of wave power generation.

In order to solve the above problems, the wave power generation control method of a certain aspect of the present invention includes a step of acquiring information on the sea condition of the sea area where the wave power generation device is installed, and wave power generation based on the acquired information. It includes a step of controlling the power generation mode of the device.

Another aspect of the present invention is a wave power generation control device. This device is a power generation mode that controls the power generation mode of the wave power generation device based on the sea condition information acquisition unit that acquires information about the sea condition of the sea area where the wave power generation device is installed and the information acquired by the sea condition information acquisition unit. It includes a control unit.

Yet another aspect of the present invention is a wave power generator. This device is a point absorber type or movable object type wave power generator, and a float that floats on the sea and is displaced by waves, a generator that converts the kinetic energy of the float into electrical energy, and a float or generator. It is equipped with a wave power generation control device for controlling the above. The wave power generation control device controls the power generation mode of the wave power generation device based on the sea condition information acquisition unit that acquires information on the sea condition of the sea area where the wave power generation device is installed and the information acquired by the sea condition information acquisition unit. A power generation mode control unit is provided.

Yet another aspect of the invention is a float. This float is provided in a wave power generation device, is a float that floats on the sea and is displaced by waves, and accommodates a fluid having a density lower than that of seawater, and expands and contracts according to the volume of the contained fluid. And an opening provided in the accommodating portion for allowing fluid to flow in and out of the accommodating portion.

It should be noted that any combination of the above components and the conversion of the expression of the present invention between methods, devices, systems, recording media, computer programs and the like are also effective as aspects of the present disclosure.

According to the present disclosure, the performance of wave power generation can be improved.

It is a figure which shows typically the appearance of the wave power generation apparatus which concerns on embodiment. It is a figure which shows the relationship between a significant wave period and energy conversion efficiency. It is a figure which shows the example of the structure of the float which concerns on embodiment. It is a figure which shows the example of the structure of the float which concerns on embodiment. It is a figure which shows another example of the structure of the float which concerns on embodiment. It is a figure which shows another example of the structure of the float which concerns on embodiment. It is a figure which shows another example of the structure of the float which concerns on embodiment. It is a figure which shows another example of the structure of the float which concerns on embodiment. It is the figure which showed the maximum wave force acting on a float for each sea figure. It is a figure which shows the structure of the wave power generation control device which concerns on embodiment. It is a figure which shows the example of the internal data of the power generation mode determination standard. It is a flowchart which shows the procedure of the wave power generation control method which concerns on embodiment.

FIG. 1 schematically shows the appearance of the wave power generation device according to the embodiment. The wave power generator 10 includes a float 11, a cabin 12, a hull 13, a pinion gear 14, a drive column 15, an anchor 16, and a wave measurement buoy 17.

The float 11 is arranged in a donut shape around the hull 13 and includes a plurality of accommodating portions. Inside each housing, a fluid such as air or water, which has a lower density than seawater, is stored. As a result, the float 11, the cabin 12, and the hull 13 can be integrated, float on the sea, and be displaced up and down by the waves.

A cabin 12 is provided above the hull 13 on which the float 11 is arranged. Since the cabin 12 is provided at a position higher than the sea level, maintenance personnel and the like can perform the work. A through hole is provided in the center of the cabin 12 and the hull 13. The drive column 15 is provided so as to penetrate the through hole and extend downward.

The drive column 15 has a columnar shape, and the lower end is fixed to an anchor 16 or the like installed on the seabed. The float 11, cabin 12 and hull 13 are slidably supported up and down along the drive column 15.

A pinion gear 14 for converting the vertical movement of the float 11, the cabin 12, and the hull 13 into a rotational movement is installed in the lower part of the hull 13, and the power generation mode of the wave power generator is installed inside the cabin 12 or the hull 13. Equipment and facilities such as control devices, generators, and instruments for control will be installed.

The float 11, the cabin 12 and the hull 13 are integrally configured, and when a wave hits the float 11, the float 11, the cabin 12 and the hull 13 move up and down integrally. This vertical motion is mechanically converted into rotational motion by the pinion gear 14, and converted into electrical energy by the generator.

A generator and utility equipment (not shown) are installed inside the hull 13, and a control device and the like are installed inside the cabin 12, so that the mass of a moving object that moves up and down by waves is the conventional wave power. It can be significantly increased compared to the power generation device. As a result, the natural period of the moving object can be lengthened to approach the predominant period, so that the power generation performance and power generation efficiency of the generator can be improved.

The wave power generation device 10 is configured to be capable of generating power by a plurality of types of power generation methods. In addition, the generator can be controlled by a plurality of control methods. The control device dynamically controls the power generation mode of the wave power generation device based on the information about the sea condition of the sea area where the wave power generation device is installed. The control device acquires the information measured by the wave measurement buoy 17 from the wave measurement buoy 17, calculates information on the sea condition such as the significant wave height and the significant wave period based on the acquired information, and the calculated information. Based on the above, the power generation mode such as the power generation method by the wave power generation device and the control method of the generator is dynamically controlled.

The wave power generator 10 arranges a flywheel on a shaft of a generator (not shown). The vertical movement of the float 11 is converted into the rotational movement of the generator via the pinion gear 14 and the speed increasing gear. At this time, the rotational inertia of the flywheel on the shaft of the generator adds an effect equivalent to the mass related to the vertical movement of the float 11. The additional amount of this mass effect is obtained by multiplying the rotational inertia of the flywheel by the square of (gear ratio / radius of gyration of the pinion gear) according to the physical principle. Therefore, the natural period of the float 11 can be adjusted by turning the flywheel on and off to adjust the mass effect of the float 11.

The control device of this embodiment controls the on / off of the flywheel connection based on the information about the sea condition. A plurality of flywheels may be provided in series, or a connection mechanism for turning on / off the connection of the flywheels may be provided. The control device may control the number of flywheel connections to any number from zero to the number of installed flywheels by controlling the connection mechanism. As a result, the power generation mode of the wave power generation device 10 can be controlled more finely, so that the power generation performance and the power generation efficiency can be further improved.

The wave power generation device 10 controls the power generation resistance and thrust so as to maximize the absorbed energy for each significant wave period and the resistance control (RLC) method for controlling the power generation resistance for each significant wave period as the control method for the generator. Resonance control (ARC) method, significant wave period tuning control (ACL) method that controls power generation resistance and thrust so as to maximize the average power at the output end of the generator for each meaningful wave period, for short-section predicted waves The control method can be selected from a plurality of control methods such as the model predictive tuning control (MPC) method that controls the power generation resistance and the thrust in real time so as to maximize the average power at the output end of the generator. In the ARC method, the ACL method, and the MPC method, the thrust of the generator gives a phase difference to the motion to bring it closer to the synchronization with the wave period, so that the power generation performance can be improved. In particular, the ACL method enables high-output operation while suppressing an increase in response amplitude, and the MPC method enables real-time optimal control, so that a significant improvement in power generation performance can be expected. On the other hand, in a situation where the wave power frequently exceeds the control force, the response amplitude may become excessive or the control accuracy may decrease. Therefore, it is important to switch to the optimum control method according to the sea conditions.

FIG. 2 shows the relationship between the significant wave period and the energy conversion efficiency. When a float with a diameter of 7 m is operated by a generator (thrust limit of 500 kN) and the generator is controlled by the model prediction tuning control method, the ratio of the average power generation amount to the wave power of the float width is defined as the significant wave period and the significant wave period. It was calculated by simulation with the wave height as a variable. The lowermost curve shows the simulation result when the generator is controlled by the resistance control method as a comparative example. When the generator was controlled by the model prediction tuning control method, it showed a high energy conversion efficiency of 25% to 40%, which is comparable to that of wind power generation, in a periodic band of about 4 to 10 seconds, which frequently appears in the actual sea area. In the range where the significant wave period is 4.5 seconds or more, the energy conversion efficiency of the model prediction synchronous control method is higher than that of the resistance control method regardless of the significant wave height. For other control methods, by simulating the energy conversion efficiency with the organic wave period and the significant wave height as variables, the energy is generated for each significant wave period and the significant wave height in the sea image of the significant wave period and the significant wave height. It is possible to determine the type of control method that can maximize the conversion efficiency.

The wave power generation device 10 is configured so that the diameter, water line area, or volume of the float 11 can be changed. In order to take in a large wave energy, it is advantageous to increase the size of the float 11, but in stormy weather, a huge wave energy is applied to the float 11, so a configuration for ensuring safety is required, which is a great cost. It takes. In the present embodiment, in order to solve such a problem, the float 11 is configured to be expandable and contractible, and in stormy weather, the float 11 is folded to reduce the buoyancy of the float 11 and the float 11 is submerged. As a result, the wave load applied to the float 11 in stormy weather can be significantly reduced. Therefore, since the structure of the wave power generation device 10 can be simplified and reduced in weight, the manufacturing cost can be significantly reduced.

3 and 4 show an example of the structure of the float 11 according to the embodiment. FIG. 3A is a top view of the float 11, and FIG. 3B is a side view of the float 11. FIG. 4 is a top view of the float 11 when it is contracted. The float 11 is provided on the cylindrical support portion 20, a plurality of accommodating portions 23 arranged around the support portion 20, a fixing portion 21 for fixing the accommodating portion 23 to the support portion 20, and the fixing portion 21. The rotating shaft 22 is provided, a protective portion 24 for protecting the accommodating portion 23, and a traction tool 25 for folding the accommodating portion 23 inward when the accommodating portion 23 contracts. The traction tool 25 may be an air cylinder, a hydraulic cylinder, or a spring.

Each accommodating portion 23 has a bale-shaped shape in which hemispheres are connected to the top and bottom of the cylinder. The accommodating portion 23 internally accommodates a fluid such as air or fresh water having a density lower than that of seawater, and expands and contracts according to the volume of the accommodating fluid. The accommodating portion 23 has an opening for allowing fluid to flow in and out of the accommodating portion 23. When the float 11 is expanded from the state shown in FIG. 4, a fluid is allowed to flow into the accommodating portion 23 from a compressor (not shown), and the accommodating portion 23 is expanded. At this time, each accommodating portion 23 is opened counterclockwise about the rotation shaft 22 while pressing against the adjacent protective portion 24. The opening direction may be clockwise. The protective portion 24 is provided so as to cover about half a circumference of the side surface of the accommodating portion 23 in order to protect the accommodating portion 23 so that the accommodating portions 23 do not come into contact with each other and be damaged. When each of the accommodating portions 23 is expanded to the maximum, the accommodating portions 23 are configured to be pressed against each other via the protective portion 24 and fixed to each other. As a result, the load applied to the individual accommodating portions 23 can be dispersed, so that the durability of the float 11 can be improved. When the float 11 is contracted from the state shown in FIG. 3, the fluid inside the accommodating portion 23 is discharged by a pump (not shown), and the accommodating portion 23 is contracted. At this time, the respective accommodating portions 23 are closed clockwise around the rotation shaft 22 by the elastic force of the traction tool 25 and the external water pressure. As a result, the diameter, water line area and volume of the float 11 can be reduced, and the buoyancy of the float 11 can be reduced.

5 and 6 show another example of the structure of the float 11 according to the embodiment. FIG. 5A is a partial top view of the float 11, and FIG. 5B is a partial side view of the float 11. FIG. 6 is a top view of the float 11 when it is contracted. In the example of this figure, the protective portion 24 is omitted, and the fixed portion 21 also serves as the rotating shaft 22. Other configurations and operations are the same as those shown in FIGS. 3 and 4.

FIG. 7 shows another example of the structure of the float 11 according to the embodiment. FIG. 7A is a top view of the float 11, and FIG. 7B is a schematic cross-sectional view of the float 11. In the example of this figure, one accommodating portion 26 is provided over the entire circumference of the support portion 20. When the float 11 is contracted, the pantograph is projected from the guide 27, and then the fluid inside the accommodating portion 26 is discharged by a pump (not shown) to contract the accommodating portion 26. At this time, the accommodating portion 26 is folded along the guide 27.

FIG. 8 shows another example of the structure of the float 11 according to the embodiment. FIG. 8A is a top view of the float 11, and FIG. 8B is a side view of the float 11. A plurality of accommodating portions 28 are provided around the support portion 20. When the float 11 is contracted, the fluid inside the accommodating portion 28 is discharged by a pump (not shown), and the belt 29 provided on the side surface of the accommodating portion 28 is wound up to fold the accommodating portion 28.

FIG. 9 is a diagram showing the maximum wave force acting on the float 11 for each sea condition. The maximum wave power was calculated for each wave height and wave period by simulation. When the wave height was 3.75 m or more, the float 11 was reduced. The maximum wave power increases as the wave height increases, but in sea conditions where the wave height is 3.75 m or more, the maximum wave power is drastically reduced due to the effect of reducing the float 11.

FIG. 10 shows the configuration of the wave power generation control device 100 according to the embodiment. The wave power generation control device 100 includes a communication device 101, a display device 102, an input device 103, a storage device 130, and a processing device 110. The wave power generation control device 100 may be a server device, a device such as a personal computer, or a mobile terminal such as a mobile phone terminal, a smartphone, or a tablet terminal.

The communication device 101 controls communication with other devices. The communication device 101 may communicate with another device by any wired or wireless communication method. The communication device 101 receives the wave measurement information from the wave measurement buoy 17. The communication device 101 receives information from the devices mounted on the wave power generation device 10, various control devices, and the like, and transmits a command to those devices.

The display device 102 displays the screen generated by the processing device 110. The display device 102 may be a liquid crystal display device, an organic EL display device, or the like. The input device 103 transmits an instruction input by the user of the wave power generation control device 100 to the processing device 110. The input device 103 may be a mouse, a keyboard, a touch pad, or the like. The display device 102 and the input device 103 may be mounted as a touch panel.

The storage device 130 stores programs, data, and the like used by the processing device 110. The storage device 130 may be a semiconductor memory, a hard disk, or the like. The storage device 130 stores the power generation mode determination standard 131, the wave measurement information holding unit 132, and the actual information holding unit 133.

The processing device 110 includes a wave measurement information acquisition unit 111, a sea condition information calculation unit 112, a power generation mode determination unit 113, a flywheel control unit 114, a generator control unit 115, a float control unit 116, a power generation performance prediction unit 117, and a determination standard update. A unit 118, a power generation performance acquisition unit 119, a performance information recording unit 120, and a learning unit 121 are provided. These configurations are realized by the CPU, memory, and other LSIs of any computer in terms of hardware, and are realized by programs loaded in memory in terms of software. It depicts a functional block realized by. Therefore, it will be understood by those skilled in the art that these functional blocks can be realized in various forms such as hardware alone or a combination of hardware and software.

The wave measurement information acquisition unit 111 acquires the wave measurement information measured by the wave measurement buoy 17 from the wave measurement buoy 17 and stores it in the wave measurement information holding unit 132. The wave measurement information includes, for example, information such as wave height, wave direction, and wave period.

The sea condition information calculation unit 112 calculates sea condition information such as a significant wave height, a significant wave period, and a power spectrum by referring to the information stored in the wave measurement information holding unit 132.

The power generation mode determination unit 113 determines the power generation mode by the wave power generation device 10 with reference to the power generation mode determination standard 131 based on the sea condition information calculated by the sea condition information calculation unit 112. The power generation mode determination unit 113 determines the power generation mode at a predetermined timing. For example, the power generation mode may be determined periodically at predetermined time intervals or when sea condition information such as wave height, wave period, and power spectrum changes by a predetermined amount or more.

FIG. 11 shows an example of internal data of the power generation mode determination standard 131. The power generation mode determination criterion 131 stores the power generation mode of the wave power generation device 10 in association with the combination of the significant wave height and the significant wave period. For example, when the significant wave height is 0.25 m and the significant wave period is 1.5 seconds, the number of flywheel connections is 2, the generator control method is A, and the control parameters in control method A are 2. It is set to 5 and the things to be generated are stored. Further, it is stored that the float 11 should be reduced when the wave height exceeds a predetermined value. The power generation mode determination criterion 131 is generated by simulating the performance of wave power generation in the wave power generation device 10 for each significant wave height and significant wave period in advance and evaluating the optimum power generation mode. As will be described later, the power generation mode determination criterion 131 is configured to be updatable even during the operation of the wave power generation device 10. The power generation mode determination criterion 131 may store the power generation mode of the wave power generation device 10 in association with a combination of three or more pieces of information. For example, in addition to the significant wave height and the significant wave period, the power generation mode of the wave power generation device 10 may be different depending on information such as a power spectrum.

When the number of flywheel connections determined by the power generation mode determination unit 113 is not zero, the flywheel control unit 114 connects the flywheel to the shaft of the generator and rotates the flywheel. Further, the flywheel connection mechanism is controlled so as to connect the flywheels of the number of connections determined by the power generation mode determination unit 113. When the number of flywheel connections determined by the power generation mode determination unit 113 is zero, the flywheel control unit 114 disconnects the generator shaft and the flywheel to stop the rotation of the flywheel. A clutch is used to connect and disconnect the generator shaft and flywheel, but other connectors may be used.

The generator control unit 115 controls the generator in the power generation mode determined by the power generation mode determination unit 113. The generator control unit 115 switches the control method of the generator to the determined control method, and controls the generator using the determined control parameters.

The float control unit 116 controls a pump or the like so as to contract the float 11 when the power generation mode determination unit 113 determines that the float 11 is to be reduced. Even if the power generation mode determination unit 113 determines the power generation mode when the float 11 is expanded when the float 11 is reduced, until a predetermined time elapses after the float 11 is contracted. Does not have to inflate the float 11. This predetermined time may be set in advance in consideration of the time required for expansion and contraction of the float 11. The float control unit 116 refers to the history of the wave measurement information stored in the wave measurement information holding unit 132, estimates whether or not the stormy weather will continue, and if it is estimated that the stormy weather will continue in the future, The expansion of the float 11 may be limited. The float control unit 116 may refer to the atmospheric pressure measured by the barometer, the weather information acquired from the server that distributes the weather information, and the like in order to estimate whether or not the stormy weather will continue. The float control unit 116 may inflate the float 11 when instructed by a person in charge to inflate the float 11 via the input device 103 or the communication device 101.

When the power generation performance prediction unit 117 operates the wave power generation device 10 in a power generation mode other than the power generation mode when the wave power generation device 10 is generating power in the power generation mode determined by the power generation mode determination unit 113. The power generation performance of the wave power generation device 10 is predicted. The power generation performance prediction unit 117 inputs the current sea condition information and the power generation mode of the wave power generation device 10 into the simulator that simulates the power generation by the wave power generation device 10, and causes the wave power generation device 10 to operate in the power generation mode. In this case, the power generation performance of the wave power generation device 10 is simulated.

When the power generation performance prediction unit 117 predicts that the power generation performance by the wave power generation device 10 will be improved when the wave power generation device 10 is operated in a power generation mode other than the current power generation mode, the determination standard update unit 118 generates power. The aspect criterion 131 is updated. The determination standard updating unit 118 changes the power generation mode stored in the power generation mode determination standard 131 in association with the current sea condition information to a power generation mode predicted by the power generation performance prediction unit 117 to have higher power generation performance. As a result, the accuracy of the power generation mode determination standard 131 can be improved, and a power generation mode having higher power generation performance can be selected.

The power generation performance acquisition unit 119 acquires information indicating the power generation performance of the wave power generation device 10 during the operation of the wave power generation device 10. The power generation performance acquisition unit 119 acquires information such as output power, integrated power, average power, and power consumption of the generator, for example.

The performance information recording unit 120 associates the sea condition information calculated by the sea condition information calculation unit 112 with the power generation mode of the wave power generation device 10 and the power generation performance acquired by the power generation performance acquisition unit 119, and the performance information holding unit 120. Record at 133.

The learning unit 121 updates the power generation mode determination standard 131 based on the actual information recorded in the actual information holding unit 133. The learning unit 121 uses the performance information as learning data, learns the optimum power generation mode according to the sea condition information by an arbitrary learning algorithm, and updates the power generation mode determination criterion 131. The power generation mode determination criterion 131 may be a neural network or the like that outputs the power generation mode from the output layer when the sea condition information is input to the input layer. In this case, the learning unit 121 may learn the power generation mode determination criterion 131 by adjusting the weight of the intermediate layer of the neural network using the actual information recorded in the actual information holding unit 133 as learning data.

FIG. 12 is a flowchart showing the procedure of the wave power generation control method according to the embodiment. The wave measurement information acquisition unit 111 of the wave power generation control device 100 acquires the wave measurement information from the wave measurement buoy 17 and stores it in the wave measurement information holding unit 132 (S10). The sea condition information calculation unit 112 calculates the sea condition information from the wave measurement information (S12). The power generation mode determination unit 113 determines the power generation mode with reference to the power generation mode determination criterion 131 based on the sea condition information (S14). The flywheel control unit 114, the generator control unit 115, and the float control unit 116 operate the wave power generation device 10 in the determined power generation mode (S16).

The present disclosure has been described above based on examples. This embodiment is an example, and it will be understood by those skilled in the art that various modifications are possible for each of these components and combinations of each processing process, and that such modifications are also within the scope of the present disclosure. ..

In the embodiment, the wave power generation device 10 is configured to optimize the power generation mode by selecting the control method of the generator, controlling the on / off of the fly wheel, and expanding / contracting the diameter of the float 11. However, the wave power generation device 10 may be configured to be capable of power generation by a power generation method such as an accumulator cylinder type, a ballast water amount adjusting method, or a mechanical latching method.

10 wave power generator, 11 float, 12 cabin, 13 hull, 14 pinion gear, 15 drive column, 16 anchor, 17 wave measurement buoy, 20 support, 21 fixed part, 22 rotating shaft, 23 accommodating part, 24 Protective unit, 25 traction tool, 26 accommodating unit, 27 guide, 28 accommodating unit, 29 belt, 100 wave power generation controller, 111 wave measurement information acquisition unit, 112 sea condition information calculation unit, 113 power generation mode determination unit, 114 fly Wheel control unit, 115 generator control unit, 116 float control unit, 117 power generation performance prediction unit, 118 judgment standard update unit, 119 power generation performance acquisition unit, 120 performance information recording unit, 121 learning unit, 131 power generation mode judgment standard, 132 Wave measurement information holding unit 133 Performance information holding unit.

Claims (15)

Steps to get information about the sea conditions in the sea area where the wave power generator is installed,
A step of controlling the power generation mode of the wave power generation device based on the acquired information, and
Wave power generation control method equipped with. The wave power generation control method according to claim 1, wherein the information includes a wave height, a wave period, or a power spectrum. The step of controlling the power generation mode is the type or control parameter of the power generation method by the wave power generation device, the type or control parameter of the control method of the generator provided in the wave power generation device, or the wave power generation device. The wave power generation control method according to claim 1 or 2, which comprises a step of controlling the expansion and contraction of the float provided. The wave power generation control method according to claim 3, wherein the step of controlling the power generation mode includes a step of controlling the number of connected flywheels used for wave power generation by the wave power generation device. 3. The step of controlling the power generation mode includes a step of selecting the control method of the generator from a resistance control method, a resonance control method, a significant wave period tuning control method, and a model prediction tuning control method. Or the wave power generation control method according to 4. The wave power generation control method according to any one of claims 3 to 5, wherein the step of controlling the power generation mode includes a step of contracting the float when the wave height exceeds a predetermined value. The wave power generation when the wave power generation device is operated in a power generation mode other than the power generation mode when the wave power generation device is generating power in the power generation mode controlled in the step of controlling the power generation mode. Steps to predict the power generation performance of the device and
Information on the sea condition of the sea area where the wave power generation device is installed when it is predicted that the power generation performance by the wave power generation device will be improved by operating the wave power generation device in a power generation mode other than the current power generation mode. To update the criteria for determining the power generation mode of the wave power generation device based on
The wave power generation control method according to any one of claims 1 to 6, further comprising. A step of recording information about the sea condition of the sea area where the wave power generation device is installed, a power generation mode of the wave power generation device, and a power generation performance of the wave power generation device in association with each other.
Based on the recorded information, the step of updating the standard for determining the power generation mode of the wave power generation device based on the information on the sea condition of the sea area where the wave power generation device is installed, and
The wave power generation control method according to any one of claims 1 to 7, further comprising. The sea condition information acquisition department that acquires information on the sea condition of the sea area where the wave power generation device is installed, and
A power generation mode control unit that controls the power generation mode of the wave power generation device based on the information acquired by the sea condition information acquisition unit.
Wave power generation control device equipped with. Further provided with a control table in which the wave height and wave period and the power generation mode of the wave power generation device to be controlled at the wave height and wave period are stored in association with each other.
The wave force according to claim 9, wherein the power generation mode control unit controls the power generation mode of the wave power generation device based on the wave height and wave period acquired by the sea condition information acquisition unit with reference to the control table. Power generation control device. Floats that float on the sea and are displaced by waves,
A generator that converts the kinetic energy of the float into electrical energy,
A wave power generation control device that controls the float or the generator,
With
The wave power generation control device is
The sea condition information acquisition department that acquires information on the sea condition of the sea area where the wave power generation device is installed, and
A power generation mode control unit that controls the power generation mode of the wave power generation device based on the information acquired by the sea condition information acquisition unit.
A wave power generator equipped with. The wave power generation device according to claim 11, wherein the float and the component in which the generator or the wave power generation control device is installed are integrally displaced. A float that is installed in a wave power generator, floats on the sea, and is displaced by waves.
A storage unit that stores a fluid with a density lower than that of seawater and expands and contracts according to the volume of the fluid to be stored.
An opening provided in the accommodating portion for allowing the fluid to flow in and out of the accommodating portion,
Float with. The float according to claim 13, wherein the diameter, water line area, or volume of the accommodating portion can be changed by allowing the fluid to flow in and out of the accommodating portion. The float according to claim 13 or 14, which is configured to be integrally displaced with another component provided in the wave power generator.

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