WO2020031349A1 - Solar power generation device and method for controlling solar power generation device - Google Patents

Solar power generation device and method for controlling solar power generation device Download PDF

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Publication number
WO2020031349A1
WO2020031349A1 PCT/JP2018/029988 JP2018029988W WO2020031349A1 WO 2020031349 A1 WO2020031349 A1 WO 2020031349A1 JP 2018029988 W JP2018029988 W JP 2018029988W WO 2020031349 A1 WO2020031349 A1 WO 2020031349A1
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WIPO (PCT)
Prior art keywords
power generation
attitude
rain
light
light receiving
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PCT/JP2018/029988
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French (fr)
Japanese (ja)
Inventor
和志 飯屋谷
塁 三上
義哉 安彦
真士 田村
健 加嶋
エル ムスタファ イバリタン
Original Assignee
住友電気工業株式会社
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Application filed by 住友電気工業株式会社 filed Critical 住友電気工業株式会社
Priority to PCT/JP2018/029988 priority Critical patent/WO2020031349A1/en
Publication of WO2020031349A1 publication Critical patent/WO2020031349A1/en

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S20/00—Supporting structures for PV modules
    • H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
    • H02S20/32—Supporting structures being movable or adjustable, e.g. for angle adjustment specially adapted for solar tracking
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Definitions

  • the present invention relates to a photovoltaic power generator and a control method for the photovoltaic power generator.
  • a photovoltaic power generation device having a solar tracking function of changing the attitude of the photovoltaic power generation panel and automatically tracking the light receiving surface to the sun. Such a photovoltaic power generator does not execute the sun tracking at night when solar radiation cannot be obtained.
  • Patent Document 1 discloses that in a situation where sufficient power generation performance cannot be expected, such as at night, the light receiving surface of the photovoltaic power generation panel is turned obliquely upward to easily receive rain, and the dust and other attached substances are washed away by rain. A device has been proposed.
  • a photovoltaic power generation device includes a photovoltaic power generation panel having a light receiving surface, a driving device that changes the attitude of the photovoltaic power generation panel, and a case where a predetermined light rain condition is satisfied during the day.
  • a control unit that causes the drive device to execute a retracting operation of changing the attitude of the solar power panel to a retracting attitude in which a light receiving surface of the solar panel faces downward.
  • control method of the photovoltaic power generation device includes a driving device that changes a photovoltaic power generation panel posture, the photovoltaic power generation panel posture, the photovoltaic power generation panel light receiving surface.
  • the operation is performed by the driving device.
  • the present disclosure can be realized not only as a photovoltaic power generation device including such a characteristic control unit and a control method of the photovoltaic power generation device having such a characteristic process as a step, but also assuming such a step as It can be realized as a program to be executed. Further, the present invention can be realized as a semiconductor integrated circuit having a function of performing some or all of the steps, or as a solar power generation system including a solar power generation device.
  • FIG. 4 is a side view showing an example of a retracted attitude of the array. It is a flowchart which shows an example of the attitude
  • the photovoltaic power generation device includes a photovoltaic power generation panel having a light receiving surface, a driving device that changes the attitude of the photovoltaic power generation panel, and a case where a predetermined light rain condition is satisfied during the day.
  • a control unit that causes the drive device to execute a retracting operation of changing the attitude of the photovoltaic panel to a retracting attitude in which the light receiving surface of the solar panel faces downward.
  • the photovoltaic panel may be a concentrating photovoltaic panel or a crystalline silicon type photovoltaic panel.
  • the retracting posture may be a horizontal posture or an inclined posture as long as the light receiving surface faces downward.
  • the light rain condition may be a condition based on at least one of precipitation intensity, precipitation, and cloudiness.
  • the light rain condition is a condition in which light rain is predicted
  • the control unit determines whether the light rain condition is a predetermined time before the time when light rain is predicted.
  • the driving device may start the shunting operation.
  • the control unit may cause the driving device to avoid the evacuation operation when a heavy rain condition different from the light rain condition is satisfied in the daytime. You may. This makes it possible to wash away dirt attached to the light receiving surface when a certain heavy rain falls.
  • the control unit may be configured such that when the solar power generation panel is in the evacuation position during the daytime and the light rain condition is not satisfied,
  • the driving device may execute a release operation for releasing the retracted posture. In this way, when the rain has stopped or when the rain has changed to a certain level, the evacuation posture of the photovoltaic power generation panel is released, and the posture of the photovoltaic power generation panel is received by the light receiving surface for receiving sunlight. It is possible to change to a cleaning posture or the like in which dirt on the light receiving surface is washed away by rain.
  • the driving device can execute a sun tracking operation in which the solar power generation panel tracks the sun, and the control unit performs the sun tracking operation.
  • the driving device may switch from the sun tracking operation to the retreat operation.
  • the solar power generation device performs the sun tracking operation in fine weather to generate power with high efficiency, and when the light rain condition is satisfied, switches from the sun tracking operation to the evacuation operation to remove dirt on the light receiving surface. Adhesion can be prevented.
  • the method for controlling a photovoltaic power generation device includes: a driving device that changes the photovoltaic power generation panel; Evacuation for changing the attitude of the photovoltaic power generation panel from the light-receiving attitude to the evacuation attitude in which the light-receiving surface faces downward when a predetermined light rain condition is satisfied during the daytime by setting the light-receiving attitude toward the sun.
  • the operation is performed by the driving device.
  • FIG. 1 is a perspective view showing a configuration of a solar power generation device according to the present embodiment
  • FIG. 2 is a side view thereof.
  • the photovoltaic power generation device 100 includes an array 1 having a shape that is continuous on the upper side and is divided into left and right sides on the lower side, and a supporting device 2 for the array.
  • the array 1 is an example of the solar panel according to the embodiment.
  • the array 1 is configured by arranging the concentrating photovoltaic modules 1M on a gantry 11 (FIG. 2) on the rear side.
  • the support device 2 includes a support column 21, a foundation 22, a two-axis driving unit 23, and a horizontal shaft 24 (FIG. 2) serving as a driving shaft.
  • the support 21 has a lower end fixed to the foundation 22 and a biaxial drive unit 23 at the upper end.
  • a box 13 (FIG. 2) for electrical connection and storage of an electric circuit is provided near the lower end of the column 21.
  • the foundation 22 is buried firmly in the ground so that only the upper surface can be seen.
  • the struts 21 are vertical and the horizontal axis 24 is horizontal.
  • the two-axis driving unit 23 can rotate the horizontal axis 24 in two directions of an azimuth (an angle with the support 21 as a central axis) and an elevation (an angle with the horizontal axis 24 as a central axis).
  • the horizontal shaft 24 is fixed to the gantry 11. Thus, if the horizontal axis 24 rotates in an azimuth or elevation direction, the array 1 also rotates in that direction.
  • the support device 2 that supports the array 1 with one support 21 is shown, but the configuration of the support device 2 is not limited to this. In short, any supporting device that can movably support the array 1 in two axes (azimuth and elevation) may be used.
  • FIG. 3 is a perspective view illustrating an example of the configuration of the module 1M.
  • the module 1M is a concentrating solar power generation module.
  • the module 1M includes a rectangular flat-bottomed container 31 made of metal, for example, and a light collector 32 mounted thereon like a lid.
  • the condensing unit 32 is configured by, for example, attaching a resin condensing lens 32f to the back surface of one transparent glass plate 32a.
  • each of the illustrated square (10 ⁇ 14) sections is a Fresnel lens as the condenser lens 32f, and can converge sunlight to a focal position.
  • the flexible printed wiring board 33 is disposed on the bottom surface 31 b of the housing 31. At a predetermined position on the flexible printed wiring board 33, a cell package 34 holding a cell (power generation element) is mounted. In the figure, a portion surrounded by a two-dot chain line “O” is an enlarged view of the light receiving portion R.
  • a secondary lens 35 is provided on the cell package 34, and a protection plate 36 is provided around the secondary lens 35.
  • the secondary lens 35 is, for example, a ball lens.
  • the protection plate 36 is, for example, an annular metal body, and a commercially available washer can be used.
  • the protection plate 36 prevents the convergent light from thermally damaging the cell periphery when the convergent light of the sunlight deviates from the secondary lens 15. Further, even when all the converging light enters the secondary lens 35, the protection plate 36 receives the scattered light in the housing 31 and reflects it.
  • the number of the light receiving portions R is provided in the same number and at the same interval corresponding to each of the condenser lenses 32f.
  • a shielding plate 37 is provided between the light receiving unit R and the light collecting unit 32.
  • a square opening 37a similar to the outer shape of one condenser lens 32f is formed at a position corresponding to each condenser lens 32f.
  • Light converged by the condenser lens 32f passes through the opening 37a.
  • FIG. 4 is an example of a sectional view showing the minimum basic configuration of the optical system.
  • the incident direction of the sunlight is perpendicular to the condenser lens 32f of the condensing unit 32, and the incident direction A S and the optical axis A X are parallel to each other (i.e., the incident direction A S and the light and the axis A X are coincident).
  • the light converged by the condenser lens 32f passes through the opening 37a of the shielding plate 37 and enters the secondary lens 35.
  • the secondary lens 35 guides the incident light to the cell 38.
  • the cell 38 is held in the cell package 34.
  • the protection plate 36 is attached so as to ride on the upper end of the cell package 34.
  • a light transmissive resin 39 is sealed between the secondary lens 35 and the cell 38. As shown in FIG. 4, when the optical axis A X connecting the condenser lens 32f and the cell 38 meets the incident direction A S of sunlight, all light collected by the condenser lens 32f cell It is led to 38. The cell 38 converts most of the received light into electrical energy and outputs power.
  • FIG. 5 is a block diagram illustrating an example of an outline of a control unit of the photovoltaic power generation device 100.
  • the control unit 5 is provided, for example, in a box 13 (see FIG. 2).
  • the control unit 5 includes a CPU 51 and a memory 52.
  • the memory 52 stores a control program 52a for executing a later-described attitude control process and a precipitation state determination process, and the CPU 51 can execute the control program 52a stored in the memory 52.
  • a driving device 6 for driving each of an azimuth driving motor 23a and an elevation driving motor 23e is provided, and the CPU 51 executes the control program 52a to execute the driving.
  • each of the motors 23a and 23e can be controlled. Accordingly, the CPU 51 drives the azimuth drive motor 23a and the elevation drive motor 23e to cause the drive device 6 to perform the sun tracking operation so that the array 1 faces the sun. Further, as described later, when a light rain condition is satisfied, the CPU 51 causes a retreat operation to change the attitude of the array 1 to the retreat attitude.
  • the memory 52 is provided with a save flag indicating whether or not the save operation can be executed (not shown).
  • the solar power generation device 100 includes a tracking sensor 701, a solar radiation sensor 702, and a precipitation sensor 703.
  • the tracking sensor 701, the solar radiation sensor 702, and the precipitation sensor 703 are installed in an empty space of the array 1 or in the vicinity of the array 1.
  • the precipitation sensor 703 is, for example, a precipitation particle size measuring device or a precipitation intensity meter, and outputs information on precipitation intensity.
  • the control unit 5 is provided with an A / D converter 53, and the CPU 51 is connected to the A / D converter 53.
  • Each of the tracking sensor 701, the solar radiation sensor 702, and the precipitation sensor 703 is connected to the A / D converter 53, and the output signals of the tracking sensor 701, the solar radiation sensor 702, and the precipitation sensor 703 are digitally output by the A / D converter 53.
  • the signal is converted into a signal and input to the control unit 5.
  • the power generated by the array 1 can be detected by the power sensor 704, and the power sensor 704 is connected to the A / D converter 53. Thereby, a signal indicating the power detected by the power sensor 704 is input to the CPU 51.
  • the control unit 5 stores the latitude and longitude of the installation location of the solar power generation device 100 and has a clock function.
  • the control unit 5 causes the driving device 6 to perform a sun tracking operation based on the output signal of the tracking sensor 701 and the position of the sun calculated from the latitude, longitude, and time so that the solar power generation panel 1 always faces the sun. Let it run. However, the tracking sensor 701 may not be provided. In that case, the sun tracking operation is performed based only on the position of the sun calculated from the latitude, longitude, and time.
  • the control unit 5 is connected to the external data source 9 via, for example, the Internet.
  • the external data source 9 is a server that provides weather information and is operated by, for example, an organization of a national or local government or a private weather information company.
  • the external data source 9 provides the control unit 5 with local weather information at the place where the photovoltaic power generator 100 is installed.
  • a space is provided between the left and right wings of the array 1 (see FIG. 1).
  • the columns 21 are located in this space, and contact between the columns 21 and the array 1 is prevented.
  • the array 1 can take any posture from a horizontal posture with the light receiving surface facing upward to a horizontal posture with the light receiving surface facing downward without interfering with the support 21 (see FIG. 2).
  • the attitude of the array 1 can be changed between the sun tracking attitude in which the light receiving surface faces the sun and the retracting attitude in which the light receiving surface faces downward by the attitude control by the control unit 5. it can.
  • FIG. 6A is a side view showing an example of the sun tracking attitude of the array 1.
  • the attitude control of the array 1 is performed so that the light receiving surface 1a faces the sun, and the attitude of the array 1 becomes the sun tracking attitude.
  • the array 1 since the sun altitude is 0 ° at sunrise or sunset, the array 1 takes a vertical posture in which the light receiving surface 1a is parallel to the vertical direction. In the daytime when the sun altitude exceeds 0 °, the array 1 takes a posture in which the light receiving surface faces upward.
  • the incident angle of sunlight on the light receiving surface 1a becomes 0 °, and efficient power generation is performed.
  • FIG. 6B is a side view showing an example of the retracted posture of the array 1.
  • the driving device 6 executes a retreat operation for changing the attitude of the array 1 to the retreat attitude.
  • the retracted posture is a horizontal posture in which the light receiving surface 1a of the array 1 faces vertically downward.
  • the retracting posture may not be a horizontal posture as long as the light receiving surface faces downward, and may be, for example, a posture inclined at an angle of 45 ° or less with respect to a horizontal plane.
  • FIG. 7 is a flowchart illustrating an example of the attitude control process of the array 1.
  • the CPU 51 determines whether or not it is during the day (step S101). In this process, for example, the CPU 51 determines whether it is daytime or nighttime based on time information obtained by a clock function provided in the control unit 5, or determines whether it is daytime or nighttime based on the solar radiation intensity detected by the solar radiation sensor 702. Or you can.
  • the CPU 51 determines whether or not the array 1 is in the evacuation posture (step S102). When the array 1 is in the retracted posture (YES in step S102), the CPU 51 ends the posture control processing. On the other hand, when the array 1 is not in the retracting posture (NO in step S102), the CPU 51 causes the driving device 6 to execute the retracting operation (step S103). Thereby, the attitude of the array 1 changes to the retracted attitude. After the processing in step S103, the CPU 51 ends the attitude control processing. With the above-described processing, the array 1 assumes the retracted posture at night.
  • step S101 determines whether the evacuation flag is set (that is, set to ON) (step S104). If the save flag is down (that is, set to off) (NO in step S104), CPU 51 causes drive device 6 to execute a sun tracking operation (step S105).
  • the array 1 takes a posture facing the sun, and the incident angle of the sunlight on the light receiving surface 1a becomes 0 ° (see FIG. 4). As a result, the light converged by the condenser lens 32f is guided to the cell 38, and power is generated.
  • the CPU 51 ends the attitude control process.
  • step S104 If the evacuation flag is set (YES in step S104), the CPU 51 shifts the processing to step S102.
  • the posture control process is terminated, and when the array 1 is not in the retreating posture (NO in step S102), the retreat operation is executed.
  • Step S103 That is, when the evacuation flag is set, the array 1 takes the evacuation posture. After the execution of the evacuation operation, the CPU 51 ends the attitude control process.
  • the CPU 51 repeatedly executes the posture control process as described above at predetermined time intervals (for example, at one second intervals).
  • the array 1 can take an appropriate posture according to the situation.
  • FIG. 8 is a flowchart illustrating an example of the precipitation state determination process.
  • the CPU 51 executes the following precipitation condition determination processing in time parallel with the attitude control processing.
  • the CPU 51 receives the weather information from the external data source 9 (Step S201).
  • the weather information includes information on predicted precipitation intensity and predicted precipitation time.
  • the CPU 51 determines whether or not precipitation is predicted based on weather information (step S202). In the process of step S202, for example, the CPU 51 determines that precipitation is predicted if the predicted rainfall intensity included in the weather information exceeds 0 mm / h, and does not predict the rainfall if the predicted rainfall intensity is 0 mm / h. Can be determined.
  • step S203 the CPU 51 determines whether light rain is predicted based on weather information.
  • the CPU 51 determines that light rain is predicted when the predicted rainfall intensity is 1 mm / h or less, for example, and does not predict light rainfall when the predicted rainfall intensity exceeds 1 mm / h.
  • heavy rain is predicted.
  • “light rain” means rain having a rainfall intensity equal to or lower than a predetermined value
  • “heavy rain” means rain having a higher rainfall intensity than light rain, that is, rain having a rainfall intensity higher than a predetermined value. means.
  • the light rain is rain having a precipitation intensity of 1 mm / h or less
  • rain having a precipitation intensity higher than 1 mm / h is heavy rain.
  • Predicting light rain is an example of light rain conditions according to the present embodiment. That is, when light rain is predicted (YES in step S203), the light rain condition is satisfied.
  • the light rain condition can be a condition based on at least one of precipitation intensity, precipitation, and cloudiness.
  • step S204 determines whether the solar radiation intensity detected by the solar radiation sensor 702 is equal to or less than a predetermined value. If the solar irradiance is high, it can be estimated that there are few clouds and it takes time until precipitation. On the other hand, if the solar radiation intensity is low, it can be estimated that there are many clouds and precipitation is near. Therefore, when the solar radiation intensity is equal to or less than the predetermined value (YES in step S204), CPU 51 sets a save flag (step S205). As a result, the operation is switched from the sun tracking operation to the evacuation operation, and the attitude of the array 1 is changed to the evacuation attitude.
  • CPU 51 determines whether or not the time reaches a time set before the predicted rain time (hereinafter, referred to as “precipitation approach time”) (step S206). . It takes a certain time for the array 1 to transition from the sun tracking posture to the evacuation posture. For this reason, if the evacuation operation is started after the predicted rainfall time has been reached, it will start to rain until the posture change to the evacuation posture is completed, and water droplets may adhere to the light receiving surface 1a. Therefore, in this example, the evacuation operation is started at the timing when the precipitation approach time is reached.
  • the attitude of the array 1 can be set to the attitude that can cope with the light rain, such as the evacuation attitude. Therefore, if the CPU 51 has not reached the precipitation approach time (NO in step S206), the CPU 51 returns the process to step S206, and if it has reached the precipitation approach time (YES in step S206), sets the evacuation flag (step S205). .
  • the set time can be determined based on the maximum time required for the retreat operation, that is, the time required for the array 1 to transition from the horizontal position in which the light receiving surface 1a faces upward to the retreat position. .
  • the evacuation flag is set, and the operation switches from the sun tracking operation to the evacuation operation.
  • the attitude of the array 1 shifts from the sun tracking attitude to the retracted attitude.
  • the sun tracking operation can be performed to generate power efficiently.
  • step S207 determines whether or not the observed rain is no longer a light rain.
  • An example of a condition for determining that the rain has stopped may be that the intensity of the rainfall is equal to or less than the measurement limit of the precipitation sensor 703 for a predetermined time (for example, two minutes).
  • a condition for determining that heavy rain has occurred may be that the rainfall intensity is higher than 1 mm / h for a predetermined time (for example, two minutes).
  • step S207 If light rain is continuously observed (NO in step S207), CPU 51 executes step S207 again. On the other hand, when it is no longer light rain (YES in step S207), CPU 51 turns down the evacuation flag (step S208). Thereby, the retreat operation is released, and the sun tracking operation is performed. As a result, the attitude of the array 1 shifts to the sun tracking attitude. If the attitude of the array 1 becomes the sun tracking attitude when the weather recovers, power generation starts. If the attitude of the array 1 becomes the sun tracking attitude when heavy rain occurs, dirt on the light receiving surface 1a is washed away by rain. When the evacuation flag is defeated, the CPU 51 ends the precipitation condition determination process.
  • step S203 If the light rain is not predicted in step S203, that is, if the heavy rain is predicted (NO in step S203), the CPU 51 shifts the processing to step S208 and turns off the evacuation flag.
  • Predicting heavy rain is an example of heavy rain conditions according to the present embodiment. That is, when heavy rain is predicted, the heavy rain condition is satisfied.
  • the value of the amount of precipitation per hour that divides light rain from heavy rain may be defined, and the prediction of precipitation exceeding this value may be set as the heavy rain condition.
  • a value of the amount of cloud per hour that separates light rain from heavy rain may be defined, and a cloud amount exceeding this value may be predicted as the heavy rain condition.
  • a complex condition combining at least two of the above-mentioned heavy rain conditions of precipitation intensity, precipitation, and cloudiness may be set as the heavy rain condition.
  • step S203 When heavy rain is predicted (YES in step S203), the evacuation flag is defeated, so that the evacuation operation is avoided, and the attitude of the array 1 becomes the sun tracking attitude. Thereby, the dirt on the light receiving surface 1a can be washed away with rain.
  • the evacuation flag is defeated, the CPU 51 ends the precipitation condition determination process.
  • step S202 determines whether rain has been observed based on the output signal of precipitation sensor 703 (step S209). In the process of step S209, the CPU 51 determines that rain has been observed if rain has been measured, regardless of, for example, the value measured by the precipitation sensor 703. If the rainfall intensity is equal to or less than the measurement limit of the precipitation sensor 703, rain is observed. It can be determined that it is not performed.
  • step S209 If no rain is observed (NO in step S209), CPU 51 shifts the processing to step S208 and turns off the evacuation flag. Thus, when it is not raining, the array 1 takes the sun tracking attitude, and power is generated. After the evacuation flag is defeated, the CPU 51 ends the precipitation condition determination process.
  • step S210 determines whether or not the observed rain is light rain (step S210). That is, in the process of step S210, it is determined whether the precipitation intensity detected by the precipitation sensor 703 is equal to or less than a predetermined value, for example, 1 mm / h. If the precipitation intensity is equal to or less than the predetermined value, the observed rain is determined to be light rain, and if the precipitation intensity is higher than the predetermined value, the observed rain is determined to be heavy rain.
  • a predetermined value for example, 1 mm / h.
  • the CPU 51 shifts the processing to step S205 and sets a save flag. As a result, a retreat operation is performed.
  • the CPU 51 executes the processing of steps S207 and S208, and ends the precipitation state determination processing.
  • the CPU 51 shifts the processing to step S208 and turns off the evacuation flag.
  • the fact that the observed rain is heavy rain is an example of the heavy rain condition according to the present embodiment. That is, when heavy rain is observed, the heavy rain condition is satisfied.
  • the evacuation flag is defeated, the evacuation operation is not performed, and the attitude of the array 1 becomes the sun tracking attitude. Thereby, the dirt on the light receiving surface 1a can be washed away with rain.
  • the CPU 51 ends the precipitation condition determination process.
  • FIG. 9 is a graph illustrating an example of a change in the power generation performance of the photovoltaic power generation panel before and after light rain.
  • the vertical axis indicates the power generation performance, and the power generation performance is compared by normalizing the ratio of the actual output (kW) to the rated output (kW) measured within a predetermined time during the day by the amount of solar radiation. Value.
  • the power generation performance is approximately 85%.
  • the power generation performance is reduced to approximately 70% due to the contamination on the light receiving surface 1a.
  • dirt was removed from the light receiving surface 1a, so that the power generation performance was restored to the same level as before the precipitation. As shown in this example, when dirt adheres to the light receiving surface 1a due to light rain, the power generation performance rapidly decreases.
  • FIG. 10 is a graph illustrating an example of a change in the power generation performance of the solar power generation panel before and after heavy rain.
  • the vertical axis indicates the power generation performance.
  • the example shown in FIG. 10 is a change in power generation performance when a rainfall with a precipitation intensity of about 60 mm / h falls.
  • the power generation performance before the precipitation was about 84%
  • the power generation performance after the precipitation was about 88%. Therefore, as a result of the dirt on the light receiving surface 1a being washed away by the heavy rain, the power generation performance was increased by about 4%.
  • the following table shows the evaluation results.
  • the total of each of the direct solar radiation amount, the measured power generation amount, and the estimated power generation amount for one day to be evaluated is shown.
  • the loss of power generation due to the evacuation operation is obtained as (actually measured power generation-estimated power generation), and is 13.3 kWh / day.
  • the following table shows the amount of power generation immediately after the light receiving surface 1a is contaminated by precipitation and when the power generation performance is restored by cleaning the light receiving surface 1a.
  • “after precipitation” indicates immediately after the light receiving surface 1a is stained
  • “after cleaning” indicates immediately after the light receiving surface 1a is cleaned.
  • both the case where the rainfall of a predetermined or less rainfall is predicted by an external organization and the case where the light rain is observed by the precipitation sensor 703 provided in the photovoltaic power generator 100 are both low.
  • the present invention is not limited to this.
  • the precipitation sensor 703 only monitors the precipitation. It can be determined whether the light rain condition has been satisfied. In the case where the precipitation sensor 703 is not provided or the like, it can be determined whether or not the light rain condition has been satisfied only by the weather information provided from the external data source 9.

Abstract

This solar power generation device is provided with: a solar power generation panel having a light receiving surface; a drive device for changing the attitude of the solar power generation panel; and a control unit which, when a predetermined light-rain condition is satisfied during the day, causes the drive device to perform a retreating operation for changing the attitude of the solar power generation panel to a retreated attitude in which the light receiving surface of the solar power generation panel faces downwards.

Description

太陽光発電装置及び太陽光発電装置の制御方法Photovoltaic power generator and method of controlling photovoltaic power generator
　この発明は太陽光発電装置及び太陽光発電装置の制御方法に関する。 The present invention relates to a photovoltaic power generator and a control method for the photovoltaic power generator.
　太陽光発電装置では、発電効率を高めるために、太陽光発電パネルにおける受光強度をできるだけ高くすることが重要である。そのため、太陽光発電パネルの姿勢を変化させ、受光面を自動的に太陽に追尾させる太陽追尾機能を備えた太陽光発電装置がある。かかる太陽光発電装置は、日射が得られない夜間には太陽追尾を実行しない。 In a solar power generation device, it is important to increase the light receiving intensity in the solar power generation panel as much as possible in order to increase the power generation efficiency. Therefore, there is a photovoltaic power generation device having a solar tracking function of changing the attitude of the photovoltaic power generation panel and automatically tracking the light receiving surface to the sun. Such a photovoltaic power generator does not execute the sun tracking at night when solar radiation cannot be obtained.
　ところで、野外に設置される太陽光発電装置では、自然環境にさらされるため受光面に汚れが付着する。受光面に汚れが付着すると、太陽光発電パネルにおける受光強度が下がり、発電効率が低下する。そこで、特許文献１には、夜間などの十分な発電性能が見込めない状況において、太陽光発電パネルの受光面を、雨を受けやすい斜め上向きにし、塵埃等の付着物を雨で洗い流す太陽光発電装置が提案されている。 By the way, in a solar power generation device installed outdoors, dirt adheres to the light receiving surface because it is exposed to the natural environment. When dirt adheres to the light receiving surface, the light receiving intensity of the solar power generation panel decreases, and the power generation efficiency decreases. Therefore, Patent Document 1 discloses that in a situation where sufficient power generation performance cannot be expected, such as at night, the light receiving surface of the photovoltaic power generation panel is turned obliquely upward to easily receive rain, and the dust and other attached substances are washed away by rain. A device has been proposed.
特開２０１６－４６９５０号公報JP 2016-46950 A
　本開示の一態様に係る太陽光発電装置は、受光面を有する太陽光発電パネルと、前記太陽光発電パネルの姿勢を変化させる駆動装置と、日中において所定の弱雨条件が成立する場合に、前記太陽光発電パネルの姿勢を、前記太陽光発電パネルの受光面が下向きとなる待避姿勢へと変化させる待避動作を前記駆動装置に実行させる制御部と、を備える。 A photovoltaic power generation device according to an aspect of the present disclosure includes a photovoltaic power generation panel having a light receiving surface, a driving device that changes the attitude of the photovoltaic power generation panel, and a case where a predetermined light rain condition is satisfied during the day. A control unit that causes the drive device to execute a retracting operation of changing the attitude of the solar power panel to a retracting attitude in which a light receiving surface of the solar panel faces downward.
　また、本開示の一の態様に係る太陽光発電装置の制御方法は、太陽光発電パネルの姿勢を変化させる駆動装置に、前記太陽光発電パネルの姿勢を、前記太陽光発電パネルの受光面を太陽に向ける受光姿勢とさせ、日中において所定の弱雨条件が成立する場合に、前記太陽光発電パネルの姿勢を、前記受光姿勢から、前記受光面が下向きとなる待避姿勢へと変化させる待避動作を前記駆動装置に実行させる。 Further, the control method of the photovoltaic power generation device according to an aspect of the present disclosure includes a driving device that changes a photovoltaic power generation panel posture, the photovoltaic power generation panel posture, the photovoltaic power generation panel light receiving surface. Evacuation for changing the attitude of the photovoltaic power generation panel from the light-receiving attitude to the evacuation attitude in which the light-receiving surface faces downward when a predetermined light rain condition is satisfied in the daytime by setting the light-receiving attitude toward the sun. The operation is performed by the driving device.
　本開示は、このような特徴的な制御部を備える太陽光発電装置、及びかかる特徴的な処理をステップとする太陽光発電装置の制御方法として実現することができるだけでなく、かかるステップをコンピュータに実行させるためのプログラムとして実現することができる。また、かかるステップの一部又は全部を実行する機能を有する半導体集積回路として実現したり、太陽光発電装置を含む太陽光発電システムとして実現したりすることができる。 The present disclosure can be realized not only as a photovoltaic power generation device including such a characteristic control unit and a control method of the photovoltaic power generation device having such a characteristic process as a step, but also assuming such a step as It can be realized as a program to be executed. Further, the present invention can be realized as a semiconductor integrated circuit having a function of performing some or all of the steps, or as a solar power generation system including a solar power generation device.
実施形態に係る太陽光発電装置の構成を示す斜視図である。It is a perspective view showing the composition of the solar power generation device concerning an embodiment. 実施形態に係る太陽光発電装置の構成を示す側面図である。It is a side view showing the composition of the photovoltaic power generator concerning an embodiment. モジュールの構成の一例を示す斜視図である。It is a perspective view showing an example of composition of a module. 光学系の最小の基本構成を現す断面図の一例である。It is an example of a sectional view showing the minimum basic composition of an optical system. 実施形態に係る太陽光発電装置の制御部の概要の一例を示すブロック図である。It is a block diagram showing an example of the outline of the control part of the photovoltaic power generator concerning an embodiment. アレイの太陽追尾姿勢の一例を示す側面図である。It is a side view which shows an example of the sun tracking attitude | position of an array. アレイの待避姿勢の一例を示す側面図である。FIG. 4 is a side view showing an example of a retracted attitude of the array. アレイの姿勢制御処理の一例を示すフローチャートである。It is a flowchart which shows an example of the attitude | position control process of an array. 降水状態判定処理の一例を示すフローチャートである。It is a flowchart which shows an example of a precipitation condition determination process. 弱雨の前後における太陽光発電パネルの発電性能の変化の一例を示すグラフである。It is a graph which shows an example of the change of the power generation performance of the photovoltaic power generation panel before and after light rain. 強雨の前後における太陽光発電パネルの発電性能の変化の一例を示すグラフである。It is a graph which shows an example of the change of the power generation performance of the photovoltaic power generation panel before and after heavy rain.
　＜本開示が解決しようとする課題＞
　強い雨の場合は、太陽光発電パネルの受光面を洗い流すのに十分な水量が見込めるが、弱い雨の場合は、受光面を雨水が流れず、大量の水滴が受光面に付着したままとなることがある。受光面に付着した水滴が乾燥すると、雨の含有物が汚れとして残留する。つまり、弱い雨の場合には、クリーニング効果が期待できず、かえって受光面を汚す可能性がある。 <Problems to be solved by the present disclosure>
In the case of heavy rain, a sufficient amount of water can be expected to wash out the light receiving surface of the photovoltaic panel, but in the case of weak rain, rainwater does not flow on the light receiving surface and a large amount of water droplets remain on the light receiving surface Sometimes. When the water droplets adhering to the light receiving surface are dried, the contents of rain remain as dirt. In other words, in the case of weak rain, a cleaning effect cannot be expected, and the light receiving surface may be rather contaminated.
　＜本開示の効果＞
　本開示によれば、弱い雨が降る場合に、太陽光発電パネルの受光面への汚れの付着を防止することができる。 <Effects of the present disclosure>
According to the present disclosure, it is possible to prevent dirt from adhering to the light receiving surface of a photovoltaic power generation panel when light rain falls.
　＜本発明の実施形態の概要＞
　以下、本発明の実施形態の概要を列記して説明する。
　（１）　本実施形態に係る太陽光発電装置は、受光面を有する太陽光発電パネルと、前記太陽光発電パネルの姿勢を変化させる駆動装置と、日中において所定の弱雨条件が成立する場合に、前記太陽光発電パネルの姿勢を、前記太陽光発電パネルの受光面が下向きとなる待避姿勢へと変化させる待避動作を前記駆動装置に実行させる制御部と、を備える。これにより、弱い雨による受光面への汚れの付着を防止することができ、汚れの付着による発電効率の低下を抑制することができる。なお、太陽光発電パネルは、集光型の太陽光発電パネルでもよく、結晶シリコン型の太陽光発電パネルでもよい。また、待避姿勢は、受光面が下向きとなる姿勢であれば、水平姿勢でもよく、傾斜姿勢でもよい。ただし、受光面に雨が当たることを防止するため、例えば水平面に対して４５°以下の傾斜角度とすることが好ましい。 <Overview of Embodiment of the Present Invention>
Hereinafter, an outline of an embodiment of the present invention will be listed and described.
(1) The photovoltaic power generation device according to the present embodiment includes a photovoltaic power generation panel having a light receiving surface, a driving device that changes the attitude of the photovoltaic power generation panel, and a case where a predetermined light rain condition is satisfied during the day. A control unit that causes the drive device to execute a retracting operation of changing the attitude of the photovoltaic panel to a retracting attitude in which the light receiving surface of the solar panel faces downward. Thereby, it is possible to prevent adhesion of dirt to the light receiving surface due to weak rain, and to suppress a decrease in power generation efficiency due to the adhesion of dirt. The photovoltaic panel may be a concentrating photovoltaic panel or a crystalline silicon type photovoltaic panel. Further, the retracting posture may be a horizontal posture or an inclined posture as long as the light receiving surface faces downward. However, in order to prevent rain from hitting the light receiving surface, it is preferable to set the inclination angle to, for example, 45 ° or less with respect to a horizontal plane.
　（２）　また、本実施形態に係る太陽光発電装置において、前記弱雨条件は、降水強度、降水量、及び雲量のうちの少なくとも１つに基づく条件であってもよい。これにより、降水強度、降水量、及び雲量のうちの少なくとも１つに基づいて弱雨と判断される場合に、太陽光発電パネルが待避姿勢をとり、受光面への汚れの付着を防止することができる。 {(2)} In the photovoltaic power generator according to the present embodiment, the light rain condition may be a condition based on at least one of precipitation intensity, precipitation, and cloudiness. With this, when it is determined that light rain is present based on at least one of precipitation intensity, precipitation, and cloudiness, the photovoltaic power generation panel takes a retracting posture to prevent dirt from adhering to the light receiving surface. Can be.
　（３）　また、本実施形態に係る太陽光発電装置において、前記弱雨条件は、弱雨が予測される条件であり、前記制御部は、前記弱雨が予測される時刻の所定時間前に、前記待避動作を前記駆動装置に開始させてもよい。これにより、弱雨が降り始めるより所定時間前に待避動作が開始されるので、弱雨が降り始める時点では太陽光発電パネルの姿勢を待避姿勢等の弱雨に対処できる姿勢とすることができる。 (3) In the photovoltaic power generator according to the present embodiment, the light rain condition is a condition in which light rain is predicted, and the control unit determines whether the light rain condition is a predetermined time before the time when light rain is predicted. The driving device may start the shunting operation. Thereby, since the evacuation operation is started a predetermined time before the light rain starts to fall, at the time when the light rain starts to fall, the posture of the photovoltaic power generation panel can be set to the posture that can cope with the light rain such as the evacuation posture. .
　（４）　また、本実施形態に係る太陽光発電装置において、前記制御部は、日中において前記弱雨条件とは異なる強雨条件が成立する場合に、前記待避動作を前記駆動装置に回避させてもよい。これにより、一定の強い雨が降る場合に、受光面に付着した汚れを洗い流すことができる。 (4) In the solar power generation device according to the present embodiment, the control unit may cause the driving device to avoid the evacuation operation when a heavy rain condition different from the light rain condition is satisfied in the daytime. You may. This makes it possible to wash away dirt attached to the light receiving surface when a certain heavy rain falls.
　（５）　また、本実施形態に係る太陽光発電装置において、前記制御部は、日中において前記太陽光発電パネルが前記待避姿勢をとっており、且つ、前記弱雨条件が成立しない場合に、前記待避姿勢を解除する解除動作を前記駆動装置に実行させてもよい。これにより、雨がやんだ場合、又は一定の強い雨に変化した場合に、太陽光発電パネルの待避姿勢を解除して、太陽光発電パネルの姿勢を、太陽光を受光面で受光する受光姿勢、雨で受光面の汚れを洗い流す洗浄姿勢等に変化させることができる。 (5) In the solar power generation device according to the present embodiment, the control unit may be configured such that when the solar power generation panel is in the evacuation position during the daytime and the light rain condition is not satisfied, The driving device may execute a release operation for releasing the retracted posture. In this way, when the rain has stopped or when the rain has changed to a certain level, the evacuation posture of the photovoltaic power generation panel is released, and the posture of the photovoltaic power generation panel is received by the light receiving surface for receiving sunlight. It is possible to change to a cleaning posture or the like in which dirt on the light receiving surface is washed away by rain.
　（６）　また、本実施形態に係る太陽光発電装置において、前記駆動装置は、前記太陽光発電パネルが太陽を追尾する太陽追尾動作を実行可能であり、前記制御部は、前記太陽追尾動作を実行している前記駆動装置に前記待避動作を実行させる場合、前記駆動装置に前記太陽追尾動作から前記待避動作へ切り替えさせてもよい。これにより、太陽光発電装置が、晴天では太陽追尾動作を実行して高効率に発電を行い、弱雨条件が成立する場合には、太陽追尾動作から待避動作へ切り替えて受光面への汚れの付着を防止することができる。 (6) In the solar power generation device according to the present embodiment, the driving device can execute a sun tracking operation in which the solar power generation panel tracks the sun, and the control unit performs the sun tracking operation. In a case where the driving device that is executing the retreat operation is performed, the driving device may switch from the sun tracking operation to the retreat operation. As a result, the solar power generation device performs the sun tracking operation in fine weather to generate power with high efficiency, and when the light rain condition is satisfied, switches from the sun tracking operation to the evacuation operation to remove dirt on the light receiving surface. Adhesion can be prevented.
　（７）　また、本実施形態に係る太陽光発電装置の制御方法は、太陽光発電パネルの姿勢を変化させる駆動装置に、前記太陽光発電パネルの姿勢を、前記太陽光発電パネルの受光面を太陽に向ける受光姿勢とさせ、日中において所定の弱雨条件が成立する場合に、前記太陽光発電パネルの姿勢を、前記受光姿勢から、前記受光面が下向きとなる待避姿勢へと変化させる待避動作を前記駆動装置に実行させる。これにより、弱い雨による受光面への汚れの付着を防止することができ、汚れの付着による発電効率の低下を抑制することができる。 (7) The method for controlling a photovoltaic power generation device according to the present embodiment includes: a driving device that changes the photovoltaic power generation panel; Evacuation for changing the attitude of the photovoltaic power generation panel from the light-receiving attitude to the evacuation attitude in which the light-receiving surface faces downward when a predetermined light rain condition is satisfied during the daytime by setting the light-receiving attitude toward the sun. The operation is performed by the driving device. Thereby, it is possible to prevent adhesion of dirt to the light receiving surface due to weak rain, and to suppress a decrease in power generation efficiency due to the adhesion of dirt.
　＜本発明の実施形態の詳細＞
　以下、図面を参照しつつ、本発明の実施形態の詳細を説明する。なお、以下に記載する実施形態の少なくとも一部を任意に組み合わせてもよい。 <Details of Embodiment of the Present Invention>
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that at least a part of the embodiments described below may be arbitrarily combined.
　〔太陽光発電装置の構成〕
　以下、本実施形態に係る太陽光発電装置の構成について説明する。 [Configuration of photovoltaic power generator]
Hereinafter, the configuration of the solar power generation device according to the present embodiment will be described.
　《太陽光発電装置の全体構成》
　図１は、本実施形態に係る太陽光発電装置の構成を示す斜視図であり、図２は、その側面図である。太陽光発電装置１００は、上部側で連続し、下部側で左右に分かれた形状のアレイ１と、その支持装置２とを備える。アレイ１は、実施形態に係る太陽光発電パネルの一例である。かかるアレイ１は、背面側の架台１１（図２）上に集光型太陽光発電モジュール１Ｍを整列させて構成されている。図１の例では、左右のウイングを構成する１９２（９６（＝１２×８）×２）個と、中央の渡り部分の８個との、合計２００個のモジュール１Ｍの集合体として、アレイ１が構成されている。 《Overall configuration of solar power generation device》
FIG. 1 is a perspective view showing a configuration of a solar power generation device according to the present embodiment, and FIG. 2 is a side view thereof. The photovoltaic power generation device 100 includes an array 1 having a shape that is continuous on the upper side and is divided into left and right sides on the lower side, and a supporting device 2 for the array. The array 1 is an example of the solar panel according to the embodiment. The array 1 is configured by arranging the concentrating photovoltaic modules 1M on a gantry 11 (FIG. 2) on the rear side. In the example of FIG. 1, the array 1 has a total of 200 modules 1M including 192 (96 (= 12 × 8) × 2) pieces constituting the left and right wings and eight pieces at the center transition portion. Is configured.
　支持装置２は、支柱２１と、基礎２２と、２軸駆動部２３と、駆動軸となる水平軸２４（図２）とを備えている。支柱２１は、下端が基礎２２に固定され、上端に２軸駆動部２３を備えている。支柱２１の下端近傍には、電気接続及び電気回路収納のためのボックス１３（図２）が設けられている。 The support device 2 includes a support column 21, a foundation 22, a two-axis driving unit 23, and a horizontal shaft 24 (FIG. 2) serving as a driving shaft. The support 21 has a lower end fixed to the foundation 22 and a biaxial drive unit 23 at the upper end. A box 13 (FIG. 2) for electrical connection and storage of an electric circuit is provided near the lower end of the column 21.
　図２において、基礎２２は、上面のみが見える程度に地中に堅固に埋設される。基礎２２を地中に埋設した状態で、支柱２１は鉛直となり、水平軸２４は水平となる。２軸駆動部２３は、水平軸２４を、方位角（支柱２１を中心軸とした角度）及び仰角（水平軸２４を中心軸とした角度）の２方向に回動させることができる。水平軸２４は、架台１１に固定されている。従って、水平軸２４が方位角又は仰角の方向に回動すれば、アレイ１もその方向に回動する。 In FIG. 2, the foundation 22 is buried firmly in the ground so that only the upper surface can be seen. With the foundation 22 buried underground, the struts 21 are vertical and the horizontal axis 24 is horizontal. The two-axis driving unit 23 can rotate the horizontal axis 24 in two directions of an azimuth (an angle with the support 21 as a central axis) and an elevation (an angle with the horizontal axis 24 as a central axis). The horizontal shaft 24 is fixed to the gantry 11. Thus, if the horizontal axis 24 rotates in an azimuth or elevation direction, the array 1 also rotates in that direction.
　なお、図１，図２では１本の支柱２１でアレイ１を支える支持装置２を示したが、支持装置２の構成は、これに限られるものではない。要するに、アレイ１を、２軸（方位角、仰角）で可動なように支持できる支持装置であればよい。 In FIGS. 1 and 2, the support device 2 that supports the array 1 with one support 21 is shown, but the configuration of the support device 2 is not limited to this. In short, any supporting device that can movably support the array 1 in two axes (azimuth and elevation) may be used.
　《モジュールの構成例》
　図３は、モジュール１Ｍの構成の一例を示す斜視図である。本例では、モジュール１Ｍを集光型の太陽光発電モジュールとしている。図において、モジュール１Ｍは、例えば金属製で長方形の平底容器状の筐体３１と、その上に蓋のように取り付けられる集光部３２と、を備えている。集光部３２は、例えば１枚の透明なガラス板３２ａの裏面に樹脂製の集光レンズ３２ｆが貼り付けられて構成されている。例えば図示の正方形（１０個×１４個）の区画の１つ１つが、集光レンズ３２ｆとしてのフレネルレンズであり、太陽光を焦点位置に収束させることができる。 《Module configuration example》
FIG. 3 is a perspective view illustrating an example of the configuration of the module 1M. In this example, the module 1M is a concentrating solar power generation module. In the figure, the module 1M includes a rectangular flat-bottomed container 31 made of metal, for example, and a light collector 32 mounted thereon like a lid. The condensing unit 32 is configured by, for example, attaching a resin condensing lens 32f to the back surface of one transparent glass plate 32a. For example, each of the illustrated square (10 × 14) sections is a Fresnel lens as the condenser lens 32f, and can converge sunlight to a focal position.
　筐体３１の底面３１ｂ上には、フレキシブルプリント配線板３３が配置されている。フレキシブルプリント配線板３３上の所定位置にはセル（発電素子）を保持するセルパッケージ３４が搭載されている。図中の、二点鎖線の「○」で囲んでいる部位は、受光部Ｒの拡大図である。受光部Ｒにおいて、セルパッケージ３４上には２次レンズ３５があり、二次レンズ３５の周りには保護板３６がある。２次レンズ３５は例えばボールレンズである。保護板３６は、例えば、円環状の金属体であり、市販のワッシャを用いることができる。保護板３６は２次レンズ１５から太陽光の収束光が外れた場合に、収束光がセル周辺に熱的なダメージを与えることを防止している。また、保護板３６は、収束光が全て２次レンズ３５に入っている場合であっても、筐体３１内での散乱光を受けてこれを反射する。 フ レ キ シ ブ ル The flexible printed wiring board 33 is disposed on the bottom surface 31 b of the housing 31. At a predetermined position on the flexible printed wiring board 33, a cell package 34 holding a cell (power generation element) is mounted. In the figure, a portion surrounded by a two-dot chain line “O” is an enlarged view of the light receiving portion R. In the light receiving section R, a secondary lens 35 is provided on the cell package 34, and a protection plate 36 is provided around the secondary lens 35. The secondary lens 35 is, for example, a ball lens. The protection plate 36 is, for example, an annular metal body, and a commercially available washer can be used. The protection plate 36 prevents the convergent light from thermally damaging the cell periphery when the convergent light of the sunlight deviates from the secondary lens 15. Further, even when all the converging light enters the secondary lens 35, the protection plate 36 receives the scattered light in the housing 31 and reflects it.
　受光部Ｒは、集光レンズ３２ｆの各々に対応して同数、同一間隔で、設けられている。受光部Ｒと集光部３２との間には、遮蔽板３７が設けられている。遮蔽板３７には、個々の集光レンズ３２ｆに対応した位置に、１つの集光レンズ３２ｆの外形状と相似な正方形の開口３７ａが形成されている。集光レンズ３２ｆによって収束する光は、開口３７ａを通過する。太陽光の入射方向と受光部Ｒの光軸とが大きくずれた場合には、ずれた位置に集光しようとする光は遮蔽板３７に当たるようになっている。 (4) The number of the light receiving portions R is provided in the same number and at the same interval corresponding to each of the condenser lenses 32f. A shielding plate 37 is provided between the light receiving unit R and the light collecting unit 32. In the shielding plate 37, a square opening 37a similar to the outer shape of one condenser lens 32f is formed at a position corresponding to each condenser lens 32f. Light converged by the condenser lens 32f passes through the opening 37a. When the incident direction of sunlight and the optical axis of the light receiving unit R are largely displaced, light to be condensed at the displaced position hits the shielding plate 37.
　図４は、光学系の最小の基本構成を現す断面図の一例である。図４では、太陽光の入射方向が集光部３２の集光レンズ３２ｆに対して垂直であり、入射方向ＡＳと光軸ＡＸとが互いに平行である（つまり、入射方向ＡＳと光軸ＡＸとが合致している）。このとき、集光レンズ３２ｆによって収束させられた光は、遮蔽板３７の開口３７ａを通り抜け、２次レンズ３５に入射する。２次レンズ３５は、入射した光をセル３８に導く。セル３８は、セルパッケージ３４の中に保持されている。保護板３６は、セルパッケージ３４の上端に乗るように取り付けられている。２次レンズ３５とセル３８との間には、光透過性の樹脂３９が封入されている。図４に示されるように、集光レンズ３２ｆとセル３８とを結ぶ光軸ＡＸが太陽光の入射方向ＡＳに合致しているとき、集光レンズ３２ｆによって集められた光の全てがセル３８に導かれる。セル３８は、受けた光の大部分を電気エネルギーに変換して電力を出力する。 FIG. 4 is an example of a sectional view showing the minimum basic configuration of the optical system. In Figure 4, the incident direction of the sunlight is perpendicular to the condenser lens 32f of the condensing unit 32, and the incident direction A S and the optical axis A X are parallel to each other (i.e., the incident direction A S and the light and the axis A X are coincident). At this time, the light converged by the condenser lens 32f passes through the opening 37a of the shielding plate 37 and enters the secondary lens 35. The secondary lens 35 guides the incident light to the cell 38. The cell 38 is held in the cell package 34. The protection plate 36 is attached so as to ride on the upper end of the cell package 34. A light transmissive resin 39 is sealed between the secondary lens 35 and the cell 38. As shown in FIG. 4, when the optical axis A X connecting the condenser lens 32f and the cell 38 meets the incident direction A S of sunlight, all light collected by the condenser lens 32f cell It is led to 38. The cell 38 converts most of the received light into electrical energy and outputs power.
　《太陽光発電装置１００の制御部の構成例》
　図５は、太陽光発電装置１００の制御部の概要の一例を示すブロック図である。制御部５は、例えばボックス１３（図２参照）内に設けられている。制御部５は、ＣＰＵ５１及びメモリ５２を備えている。メモリ５２には、後述する姿勢制御処理、及び降水状態判定処理を実行するための制御プログラム５２ａが格納されており、ＣＰＵ５１は、メモリ５２に格納された制御プログラム５２ａを実行することができる。また、例えばボックス１３内には、方位角駆動用のモータ２３ａと、仰角駆動用のモータ２３ｅとのそれぞれを駆動する駆動装置６が設けられており、ＣＰＵ５１は制御プログラム５２ａを実行することにより駆動装置６に制御信号を出力し、モータ２３ａ，２３ｅのそれぞれを制御することができる。これにより、ＣＰＵ５１は、方位角駆動用のモータ２３ａと、仰角駆動用のモータ２３ｅとを駆動して、アレイ１が太陽に正対するように、駆動装置６に太陽追尾動作を行わせる。また、ＣＰＵ５１は、後述するように、弱雨条件が成立する場合に、アレイ１の姿勢を待避姿勢に変化させる待避動作を行わせる。メモリ５２には、待避動作の実行可否を示す待避フラグが設けられている（図示せず）。 << Configuration example of control unit of solar power generation device 100 >>
FIG. 5 is a block diagram illustrating an example of an outline of a control unit of the photovoltaic power generation device 100. The control unit 5 is provided, for example, in a box 13 (see FIG. 2). The control unit 5 includes a CPU 51 and a memory 52. The memory 52 stores a control program 52a for executing a later-described attitude control process and a precipitation state determination process, and the CPU 51 can execute the control program 52a stored in the memory 52. In the box 13, for example, a driving device 6 for driving each of an azimuth driving motor 23a and an elevation driving motor 23e is provided, and the CPU 51 executes the control program 52a to execute the driving. By outputting a control signal to the device 6, each of the motors 23a and 23e can be controlled. Accordingly, the CPU 51 drives the azimuth drive motor 23a and the elevation drive motor 23e to cause the drive device 6 to perform the sun tracking operation so that the array 1 faces the sun. Further, as described later, when a light rain condition is satisfied, the CPU 51 causes a retreat operation to change the attitude of the array 1 to the retreat attitude. The memory 52 is provided with a save flag indicating whether or not the save operation can be executed (not shown).
　太陽光発電装置１００は、追尾センサ７０１、日射センサ７０２、及び降水センサ７０３を備える。追尾センサ７０１、日射センサ７０２、及び降水センサ７０３は、アレイ１の空きスペース、又はアレイ１の近傍に設置される。降水センサ７０３は、例えば降水粒径測定器又は降水強度計であり、降水強度に関する情報を出力する。制御部５にはＡ／Ｄコンバータ５３が設けられており、ＣＰＵ５１には、Ａ／Ｄコンバータ５３が接続されている。追尾センサ７０１、日射センサ７０２、及び降水センサ７０３のそれぞれはＡ／Ｄコンバータ５３に接続され、追尾センサ７０１、日射センサ７０２、及び降水センサ７０３のそれぞれの出力信号は、Ａ／Ｄコンバータ５３によってデジタル信号に変換されて制御部５に入力される。また、アレイ１の発電電力は、電力センサ７０４で検知することができ、電力センサ７０４はＡ／Ｄコンバータ５３に接続される。これにより、ＣＰＵ５１には電力センサ７０４によって検知された電力を示す信号が入力される。制御部５は、太陽光発電装置１００の設置場所の緯度、経度を記憶し、また、時計機能を有している。制御部５は、追尾センサ７０１の出力信号と、緯度・経度・時刻から演算される太陽の位置とに基づいて、太陽光発電パネル１が常に太陽に向くよう、駆動装置６に太陽追尾動作を実行させる。但し、追尾センサ７０１は設けない場合もある。その場合には、緯度・経度・時刻から演算される太陽の位置にのみ基づいて太陽追尾動作が行われる。 The solar power generation device 100 includes a tracking sensor 701, a solar radiation sensor 702, and a precipitation sensor 703. The tracking sensor 701, the solar radiation sensor 702, and the precipitation sensor 703 are installed in an empty space of the array 1 or in the vicinity of the array 1. The precipitation sensor 703 is, for example, a precipitation particle size measuring device or a precipitation intensity meter, and outputs information on precipitation intensity. The control unit 5 is provided with an A / D converter 53, and the CPU 51 is connected to the A / D converter 53. Each of the tracking sensor 701, the solar radiation sensor 702, and the precipitation sensor 703 is connected to the A / D converter 53, and the output signals of the tracking sensor 701, the solar radiation sensor 702, and the precipitation sensor 703 are digitally output by the A / D converter 53. The signal is converted into a signal and input to the control unit 5. The power generated by the array 1 can be detected by the power sensor 704, and the power sensor 704 is connected to the A / D converter 53. Thereby, a signal indicating the power detected by the power sensor 704 is input to the CPU 51. The control unit 5 stores the latitude and longitude of the installation location of the solar power generation device 100 and has a clock function. The control unit 5 causes the driving device 6 to perform a sun tracking operation based on the output signal of the tracking sensor 701 and the position of the sun calculated from the latitude, longitude, and time so that the solar power generation panel 1 always faces the sun. Let it run. However, the tracking sensor 701 may not be provided. In that case, the sun tracking operation is performed based only on the position of the sun calculated from the latitude, longitude, and time.
　また、制御部５は外部データソース９に例えばインターネットを介して接続されている。外部データソース９は、気象情報を提供する、例えば国・地方公共団体の機関又は民間気象情報会社が運営するサーバである。かかる外部データソース９は、太陽光発電装置１００が設置されている場所における局所的な気象情報を制御部５に提供する。 The control unit 5 is connected to the external data source 9 via, for example, the Internet. The external data source 9 is a server that provides weather information and is operated by, for example, an organization of a national or local government or a private weather information company. The external data source 9 provides the control unit 5 with local weather information at the place where the photovoltaic power generator 100 is installed.
　〔太陽光発電装置の動作〕
　次に、本実施形態に係る太陽光発電装置の動作について説明する。 [Operation of photovoltaic power generator]
Next, the operation of the solar power generation device according to the present embodiment will be described.
　《太陽光発電パネルの姿勢》
　アレイ１の左右のウイングの間には空間が設けられている（図１参照）。アレイ１が仰角方向に回動すると支柱２１がこの空間内に位置し、支柱２１とアレイ１との接触が防止される。このように、アレイ１は支柱２１と干渉することなく、受光面を上方に向けた水平姿勢から、受光面を下方に向けた水平姿勢まで、任意の姿勢をとることができる（図２参照）。太陽光発電装置１００では、制御部５による姿勢制御により、アレイ１の姿勢を、受光面を太陽に正対させる太陽追尾姿勢と、受光面を下方に向ける待避姿勢との間で変化させることができる。 《Position of solar panel》
A space is provided between the left and right wings of the array 1 (see FIG. 1). When the array 1 rotates in the elevation direction, the columns 21 are located in this space, and contact between the columns 21 and the array 1 is prevented. In this way, the array 1 can take any posture from a horizontal posture with the light receiving surface facing upward to a horizontal posture with the light receiving surface facing downward without interfering with the support 21 (see FIG. 2). . In the photovoltaic power generator 100, the attitude of the array 1 can be changed between the sun tracking attitude in which the light receiving surface faces the sun and the retracting attitude in which the light receiving surface faces downward by the attitude control by the control unit 5. it can.
　図６Ａは、アレイ１の太陽追尾姿勢の一例を示す側面図である。駆動装置６が太陽追尾動作を実行すると、受光面１ａが太陽に正対するようにアレイ１の姿勢制御が行われ、アレイ１の姿勢が太陽追尾姿勢となる。例えば、日の出又は日の入りにおいては太陽高度が０°であるため、アレイ１は受光面１ａが鉛直方向と平行になる鉛直姿勢をとる。また、太陽高度が０°を超える日中においては、アレイ１は受光面が上方を向く姿勢をとる。アレイ１が太陽追尾姿勢をとることにより、受光面１ａに対する太陽光の入射角が０°となり、効率的な発電が行われる FIG. 6A is a side view showing an example of the sun tracking attitude of the array 1. When the driving device 6 executes the sun tracking operation, the attitude control of the array 1 is performed so that the light receiving surface 1a faces the sun, and the attitude of the array 1 becomes the sun tracking attitude. For example, since the sun altitude is 0 ° at sunrise or sunset, the array 1 takes a vertical posture in which the light receiving surface 1a is parallel to the vertical direction. In the daytime when the sun altitude exceeds 0 °, the array 1 takes a posture in which the light receiving surface faces upward. When the array 1 takes the sun tracking posture, the incident angle of sunlight on the light receiving surface 1a becomes 0 °, and efficient power generation is performed.
　図６Ｂは、アレイ１の待避姿勢の一例を示す側面図である。太陽追尾動作の実行中に一定の弱雨条件が成立すると、駆動装置６がアレイ１の姿勢を待避姿勢へと変化させる待避動作を実行する。図６Ｂに示される例では、待避姿勢はアレイ１の受光面１ａが鉛直下方を向く水平姿勢とされる。なお、待避姿勢は受光面が下方を向く姿勢であれば水平姿勢でなくてもよく、例えば水平面に対して４５°以下の角度で傾斜した姿勢であってもよい。 FIG. 6B is a side view showing an example of the retracted posture of the array 1. When a certain low rainfall condition is satisfied during execution of the sun tracking operation, the driving device 6 executes a retreat operation for changing the attitude of the array 1 to the retreat attitude. In the example shown in FIG. 6B, the retracted posture is a horizontal posture in which the light receiving surface 1a of the array 1 faces vertically downward. Note that the retracting posture may not be a horizontal posture as long as the light receiving surface faces downward, and may be, for example, a posture inclined at an angle of 45 ° or less with respect to a horizontal plane.
　《太陽光発電装置１００の動作例》
　図７は、アレイ１の姿勢制御処理の一例を示すフローチャートである。ＣＰＵ５１は、日中であるか否かを判定する（ステップＳ１０１）。この処理では、ＣＰＵ５１が、例えば、制御部５が備える時計機能によって得られる時刻情報により日中か夜間かを判定したり、日射センサ７０２によって検出される日射強度により日中か夜間かを判定したりすることができる。 << Operation example of solar power generation device 100 >>
FIG. 7 is a flowchart illustrating an example of the attitude control process of the array 1. The CPU 51 determines whether or not it is during the day (step S101). In this process, for example, the CPU 51 determines whether it is daytime or nighttime based on time information obtained by a clock function provided in the control unit 5, or determines whether it is daytime or nighttime based on the solar radiation intensity detected by the solar radiation sensor 702. Or you can.
　日中ではないと判定された場合（ステップＳ１０１においてＮＯ）、ＣＰＵ５１は、アレイ１が待避姿勢をとっているか否かを判定する（ステップＳ１０２）。アレイ１が待避姿勢をとっている場合（ステップＳ１０２においてＹＥＳ）、ＣＰＵ５１は姿勢制御処理を終了する。他方、アレイ１が待避姿勢をとっていない場合（ステップＳ１０２においてＮＯ）、ＣＰＵ５１は駆動装置６に待避動作を実行させる（ステップＳ１０３）。これにより、アレイ１の姿勢が待避姿勢へと変化する。ステップＳ１０３の処理の後、ＣＰＵ５１は姿勢制御処理を終了する。以上のような処理により、夜間ではアレイ１が待避姿勢をとることになる。 場合 When it is determined that the day is not during the day (NO in step S101), the CPU 51 determines whether or not the array 1 is in the evacuation posture (step S102). When the array 1 is in the retracted posture (YES in step S102), the CPU 51 ends the posture control processing. On the other hand, when the array 1 is not in the retracting posture (NO in step S102), the CPU 51 causes the driving device 6 to execute the retracting operation (step S103). Thereby, the attitude of the array 1 changes to the retracted attitude. After the processing in step S103, the CPU 51 ends the attitude control processing. With the above-described processing, the array 1 assumes the retracted posture at night.
　日中であると判定された場合（ステップＳ１０１においてＹＥＳ）、ＣＰＵ５１は、待避フラグが立っているか（つまり、オンにセットされているか）否かを判定する（ステップＳ１０４）。待避フラグが倒れている（つまり、オフにセットされている）場合（ステップＳ１０４においてＮＯ）、ＣＰＵ５１は、駆動装置６に太陽追尾動作を実行させる（ステップＳ１０５）。この太陽追尾動作により、アレイ１が太陽に正対する姿勢をとり、受光面１ａに対する太陽光の入射角度が０°となる（図４参照）。この結果、集光レンズ３２ｆによる収束光がセル３８に導かれ、発電が行われる。太陽追尾動作を実行した後、ＣＰＵ５１は姿勢制御処理を終了する。 If it is determined that the day is during the day (YES in step S101), the CPU 51 determines whether the evacuation flag is set (that is, set to ON) (step S104). If the save flag is down (that is, set to off) (NO in step S104), CPU 51 causes drive device 6 to execute a sun tracking operation (step S105). By this sun tracking operation, the array 1 takes a posture facing the sun, and the incident angle of the sunlight on the light receiving surface 1a becomes 0 ° (see FIG. 4). As a result, the light converged by the condenser lens 32f is guided to the cell 38, and power is generated. After executing the sun tracking operation, the CPU 51 ends the attitude control process.
　待避フラグが立っている場合（ステップＳ１０４においてＹＥＳ）、ＣＰＵ５１は、ステップＳ１０２へ処理を移す。これにより、アレイ１が待避姿勢をとっている場合（ステップＳ１０２においてＹＥＳ）、姿勢制御処理が終了され、アレイ１が待避姿勢をとっていない場合（ステップＳ１０２においてＮＯ）、待避動作が実行される（ステップＳ１０３）。つまり、待避フラグが立っている場合、アレイ１が待避姿勢をとることになる。待避動作の実行後、ＣＰＵ５１は姿勢制御処理を終了する。 If the evacuation flag is set (YES in step S104), the CPU 51 shifts the processing to step S102. Thus, when the array 1 is in the retreating posture (YES in step S102), the posture control process is terminated, and when the array 1 is not in the retreating posture (NO in step S102), the retreat operation is executed. (Step S103). That is, when the evacuation flag is set, the array 1 takes the evacuation posture. After the execution of the evacuation operation, the CPU 51 ends the attitude control process.
　ＣＰＵ５１は、上記のような姿勢制御処理を所定時間間隔（例えば、１秒間隔）で繰り返し実行する。これにより、状況に応じてアレイ１が適切な姿勢をとることができる。 The CPU 51 repeatedly executes the posture control process as described above at predetermined time intervals (for example, at one second intervals). Thus, the array 1 can take an appropriate posture according to the situation.
　図８は、降水状態判定処理の一例を示すフローチャートである。ＣＰＵ５１は、以下のような降水状態判定処理を、姿勢制御処理と時間的に並行して実行する。 FIG. 8 is a flowchart illustrating an example of the precipitation state determination process. The CPU 51 executes the following precipitation condition determination processing in time parallel with the attitude control processing.
　ＣＰＵ５１は、外部データソース９から気象情報を受信する（ステップＳ２０１）。気象情報には、予測降水強度と、予測降水時刻の情報が含まれている。ＣＰＵ５１は、気象情報に基づいて降水が予測されるか否かを判定する（ステップＳ２０２）。ステップＳ２０２の処理では、ＣＰＵ５１が、例えば気象情報に含まれる予測降水強度が０ｍｍ／ｈを超える場合に降水が予測されると判定し、予測降水強度が０ｍｍ／ｈである場合に降水が予測されないと判定することができる。 The CPU 51 receives the weather information from the external data source 9 (Step S201). The weather information includes information on predicted precipitation intensity and predicted precipitation time. The CPU 51 determines whether or not precipitation is predicted based on weather information (step S202). In the process of step S202, for example, the CPU 51 determines that precipitation is predicted if the predicted rainfall intensity included in the weather information exceeds 0 mm / h, and does not predict the rainfall if the predicted rainfall intensity is 0 mm / h. Can be determined.
　降水が予測される場合（ステップＳ２０２においてＹＥＳ）、ＣＰＵ５１は気象情報に基づいて弱雨が予測されるか否かを判定する（ステップＳ２０３）。ステップＳ２０３の処理では、ＣＰＵ５１が、例えば予測降水強度が１ｍｍ／ｈ以下である場合に弱雨が予測されると判定し、予測降水強度が１ｍｍ／ｈを超える場合に弱雨が予測されない、つまり、強雨が予測されると判定することができる。なお、ここでいう「弱雨」は、所定値以下の降水強度の雨を意味し、「強雨」は、弱雨に比べて降水強度が高い雨、つまり所定値より降水強度が高い雨を意味する。例えば、弱雨が降水強度１ｍｍ／ｈ以下の雨の場合、降水強度が１ｍｍ／ｈより高い雨が強雨となる。 If rain is predicted (YES in step S202), the CPU 51 determines whether light rain is predicted based on weather information (step S203). In the process of step S203, the CPU 51 determines that light rain is predicted when the predicted rainfall intensity is 1 mm / h or less, for example, and does not predict light rainfall when the predicted rainfall intensity exceeds 1 mm / h. , It can be determined that heavy rain is predicted. Here, “light rain” means rain having a rainfall intensity equal to or lower than a predetermined value, and “heavy rain” means rain having a higher rainfall intensity than light rain, that is, rain having a rainfall intensity higher than a predetermined value. means. For example, when the light rain is rain having a precipitation intensity of 1 mm / h or less, rain having a precipitation intensity higher than 1 mm / h is heavy rain.
　弱雨が予測されることは、本実施形態に係る弱雨条件の一例である。つまり、弱雨が予測される場合（ステップＳ２０３においてＹＥＳ）、弱雨条件が成立する。 Predicting light rain is an example of light rain conditions according to the present embodiment. That is, when light rain is predicted (YES in step S203), the light rain condition is satisfied.
　例えば、弱雨と強雨とを区分する降水量の値を規定し、この値以下の降水量が予測されることを弱雨条件としてもよい。また、弱雨と強雨とを区分する雲量の値を規定し、この値以下の雲量が予測されることを弱雨条件としてもよい。また、上記の降水強度、降水量、及び雲量の弱雨条件の少なくとも２つを組み合わせた複合条件を弱雨条件としてもよい。換言すれば、弱雨条件は、降水強度、降水量、及び雲量のうちの少なくとも１つに基づく条件とすることができる。 For example, it is possible to define a value of precipitation that separates light rain from heavy rain, and to predict that a precipitation less than this value is set as the light rain condition. Further, a value of the amount of cloud that separates light rain from heavy rain may be defined, and a predicted amount of cloud less than this value may be set as the light rain condition. Further, a composite condition combining at least two of the above-mentioned precipitation intensity, precipitation amount, and cloudiness light rain condition may be set as the light rain condition. In other words, the light rain condition can be a condition based on at least one of precipitation intensity, precipitation, and cloudiness.
　弱雨が予測される場合（ステップＳ２０３においてＹＥＳ）、ＣＰＵ５１は、日射センサ７０２によって検出される日射強度が所定値以下であるか否かを判定する（ステップＳ２０４）。日射強度が高ければ、雲が少なく、降水まで時間がかかると推定することができる。他方、日射強度が低ければ、雲が多く、降水が間近であると推定することができる。そこで、ＣＰＵ５１は、日射強度が所定値以下である場合（ステップＳ２０４においてＹＥＳ）、待避フラグを立てる（ステップＳ２０５）。この結果、太陽追尾動作から待避動作に切り替わり、アレイ１の姿勢が待避姿勢へと変化する。 If light rain is predicted (YES in step S203), the CPU 51 determines whether the solar radiation intensity detected by the solar radiation sensor 702 is equal to or less than a predetermined value (step S204). If the solar irradiance is high, it can be estimated that there are few clouds and it takes time until precipitation. On the other hand, if the solar radiation intensity is low, it can be estimated that there are many clouds and precipitation is near. Therefore, when the solar radiation intensity is equal to or less than the predetermined value (YES in step S204), CPU 51 sets a save flag (step S205). As a result, the operation is switched from the sun tracking operation to the evacuation operation, and the attitude of the array 1 is changed to the evacuation attitude.
　日射強度が所定値より高い場合（ステップＳ２０４においてＮＯ）、ＣＰＵ５１は、予測降水時刻より設定時間前の時刻（以下、「降水接近時刻」という）に到達したか否かを判定する（ステップＳ２０６）。アレイ１が太陽追尾姿勢から待避姿勢へと移行する間には一定の時間を要する。このため、予測降水時刻に到達してから待避動作を開始すると、待避姿勢への姿勢変化を完了するまでに雨が降り始め、受光面１ａに水滴が付着する可能性がある。したがって、この例では降水接近時刻に到達したタイミングで、待避動作を開始する。これにより、弱雨が降り始める時点ではアレイ１の姿勢を待避姿勢等の弱雨に対処できる姿勢とすることができる。そのため、ＣＰＵ５１は、降水接近時刻に到達していない場合（ステップＳ２０６においてＮＯ）、ステップＳ２０６へ処理を戻し、降水接近時刻に到達した場合（ステップＳ２０６においてＹＥＳ）、待避フラグを立てる（ステップＳ２０５）。なお、設定時間は、待避動作に必要な最大時間、つまり、アレイ１が、受光面１ａが上方を向いた水平姿勢から、待避姿勢へと移行するのに必要な時間に基づいて決めることができる。 When the insolation intensity is higher than the predetermined value (NO in step S204), CPU 51 determines whether or not the time reaches a time set before the predicted rain time (hereinafter, referred to as “precipitation approach time”) (step S206). . It takes a certain time for the array 1 to transition from the sun tracking posture to the evacuation posture. For this reason, if the evacuation operation is started after the predicted rainfall time has been reached, it will start to rain until the posture change to the evacuation posture is completed, and water droplets may adhere to the light receiving surface 1a. Therefore, in this example, the evacuation operation is started at the timing when the precipitation approach time is reached. Thereby, at the time when the light rain starts to fall, the attitude of the array 1 can be set to the attitude that can cope with the light rain, such as the evacuation attitude. Therefore, if the CPU 51 has not reached the precipitation approach time (NO in step S206), the CPU 51 returns the process to step S206, and if it has reached the precipitation approach time (YES in step S206), sets the evacuation flag (step S205). . Note that the set time can be determined based on the maximum time required for the retreat operation, that is, the time required for the array 1 to transition from the horizontal position in which the light receiving surface 1a faces upward to the retreat position. .
　上記のように、弱雨条件が成立すると、待避フラグが立ち、太陽追尾動作から待避動作に切り替わる。これにより、アレイ１の姿勢が太陽追尾姿勢から待避姿勢へと移行する。晴天又は雲があっても降水がなく発電可能な日射強度が得られる気象状態では、太陽追尾動作を実行して高効率に発電を行うことができる。弱雨条件が成立し、アレイ１が待避姿勢をとると、受光面１ａへの雨の付着が防止され、結果として受光面１ａの汚れが防止される。 す る と As described above, when the light rain condition is satisfied, the evacuation flag is set, and the operation switches from the sun tracking operation to the evacuation operation. As a result, the attitude of the array 1 shifts from the sun tracking attitude to the retracted attitude. In a weather condition in which there is no precipitation even when there is fine weather or clouds, and the solar radiation intensity that can generate power can be obtained, the sun tracking operation can be performed to generate power efficiently. When the light rain condition is satisfied and the array 1 is in the retracted posture, the adhesion of rain to the light receiving surface 1a is prevented, and as a result, the light receiving surface 1a is prevented from being stained.
　次にＣＰＵ５１は、雨が降り始めた後、観測される雨が弱雨ではなくなったか否かを判定する（ステップＳ２０７）。ステップＳ２０７の処理では、雨が止んだ場合に弱雨ではなくなったと判定されてもよいし、雨が止んだ場合と、強雨となった場合とに、弱雨ではなくなったと判定されてもよい。雨が止んだと判定される条件の一例は、所定時間（例えば２分間）継続して降水強度が降水センサ７０３の測定限界以下となることとすることができる。また、強雨となったと判定される条件の一例は、所定時間（例えば２分間）継続して降水強度が１ｍｍ／ｈより高くなることとすることができる。 Next, after the rain starts to fall, the CPU 51 determines whether or not the observed rain is no longer a light rain (step S207). In the process of step S207, it may be determined that the light rain is no longer when the rain stops, or it may be determined that the light rain is no longer when the rain stops or when the rain becomes heavy. . An example of a condition for determining that the rain has stopped may be that the intensity of the rainfall is equal to or less than the measurement limit of the precipitation sensor 703 for a predetermined time (for example, two minutes). An example of a condition for determining that heavy rain has occurred may be that the rainfall intensity is higher than 1 mm / h for a predetermined time (for example, two minutes).
　弱雨が継続して観測される場合（ステップＳ２０７においてＮＯ）、ＣＰＵ５１はステップＳ２０７を再度実行する。他方、弱雨ではなくなった場合（ステップＳ２０７においてＹＥＳ）、ＣＰＵ５１は待避フラグを倒す（ステップＳ２０８）。これにより、待避動作が解除され、太陽追尾動作が実行される。この結果、アレイ１の姿勢が太陽追尾姿勢へと移行する。天候が回復した場合にアレイ１の姿勢が太陽追尾姿勢となると、発電が始まる。また、強雨となった場合にアレイ１の姿勢が太陽追尾姿勢となると、受光面１ａの汚れが雨で洗い流される。待避フラグを倒すと、ＣＰＵ５１は降水状態判定処理を終了する。 場合 If light rain is continuously observed (NO in step S207), CPU 51 executes step S207 again. On the other hand, when it is no longer light rain (YES in step S207), CPU 51 turns down the evacuation flag (step S208). Thereby, the retreat operation is released, and the sun tracking operation is performed. As a result, the attitude of the array 1 shifts to the sun tracking attitude. If the attitude of the array 1 becomes the sun tracking attitude when the weather recovers, power generation starts. If the attitude of the array 1 becomes the sun tracking attitude when heavy rain occurs, dirt on the light receiving surface 1a is washed away by rain. When the evacuation flag is defeated, the CPU 51 ends the precipitation condition determination process.
　また、ステップＳ２０３において弱雨が予測されない場合、つまり、強雨が予測される場合には（ステップＳ２０３においてＮＯ）、ＣＰＵ５１は、ステップＳ２０８へ処理を移し、待避フラグを倒す。強雨が予測されることは、本実施形態に係る強雨条件の一例である。つまり、強雨が予測される場合、強雨条件が成立する。 If the light rain is not predicted in step S203, that is, if the heavy rain is predicted (NO in step S203), the CPU 51 shifts the processing to step S208 and turns off the evacuation flag. Predicting heavy rain is an example of heavy rain conditions according to the present embodiment. That is, when heavy rain is predicted, the heavy rain condition is satisfied.
　例えば、弱雨と強雨とを区分する１時間あたりの降水量の値を規定し、この値を超える降水量が予測されることを強雨条件としてもよい。また、弱雨と強雨とを区分する１時間あたりの雲量の値を規定し、この値を超える雲量が予測されることを強雨条件としてもよい。また、上記の降水強度、降水量、及び雲量の強雨条件の少なくとも２つを組み合わせた複合条件を強雨条件としてもよい。 For example, the value of the amount of precipitation per hour that divides light rain from heavy rain may be defined, and the prediction of precipitation exceeding this value may be set as the heavy rain condition. In addition, a value of the amount of cloud per hour that separates light rain from heavy rain may be defined, and a cloud amount exceeding this value may be predicted as the heavy rain condition. In addition, a complex condition combining at least two of the above-mentioned heavy rain conditions of precipitation intensity, precipitation, and cloudiness may be set as the heavy rain condition.
　強雨が予測される場合（ステップＳ２０３においてＹＥＳ）、待避フラグが倒されることで、待避動作が回避され、アレイ１の姿勢が太陽追尾姿勢となる。これにより、受光面１ａの汚れを雨で洗い流すことができる。待避フラグを倒すと、ＣＰＵ５１は降水状態判定処理を終了する。 When heavy rain is predicted (YES in step S203), the evacuation flag is defeated, so that the evacuation operation is avoided, and the attitude of the array 1 becomes the sun tracking attitude. Thereby, the dirt on the light receiving surface 1a can be washed away with rain. When the evacuation flag is defeated, the CPU 51 ends the precipitation condition determination process.
　また、ステップＳ２０２において降水が予測されない場合（ステップＳ２０２においてＮＯ）、ＣＰＵ５１は、降水センサ７０３の出力信号に基づいて雨が観測されたか否かを判定する（ステップＳ２０９）。ステップＳ２０９の処理では、ＣＰＵ５１が、例えば降水センサ７０３による測定値を問わず、雨が測定されれば雨が観測されたと判定し、降水強度が降水センサ７０３の測定限界以下であれば雨が観測されないと判定することができる。 If rain is not predicted in step S202 (NO in step S202), CPU 51 determines whether rain has been observed based on the output signal of precipitation sensor 703 (step S209). In the process of step S209, the CPU 51 determines that rain has been observed if rain has been measured, regardless of, for example, the value measured by the precipitation sensor 703. If the rainfall intensity is equal to or less than the measurement limit of the precipitation sensor 703, rain is observed. It can be determined that it is not performed.
　雨が観測されない場合には（ステップＳ２０９においてＮＯ）、ＣＰＵ５１はステップＳ２０８へ処理を移し、待避フラグを倒す。これにより、雨が降っていない場合に、アレイ１が太陽追尾姿勢をとり、発電が行われる。待避フラグが倒された後、ＣＰＵ５１は降水状態判定処理を終了する。 If no rain is observed (NO in step S209), CPU 51 shifts the processing to step S208 and turns off the evacuation flag. Thus, when it is not raining, the array 1 takes the sun tracking attitude, and power is generated. After the evacuation flag is defeated, the CPU 51 ends the precipitation condition determination process.
　他方、雨が観測された場合には（ステップＳ２０９においてＹＥＳ）、ＣＰＵ５１は、観測された雨が弱雨であるか否かを判定する（ステップＳ２１０）。つまり、ステップＳ２１０の処理では、降水センサ７０３によって検出される降水強度が所定値、例えば１ｍｍ／ｈ以下であるか否かが判定される。降水強度が所定値以下であれば、観測された雨が弱雨であると判定され、降水強度が所定値より高ければ、観測された雨が強雨であると判定される。観測された雨が弱雨であることは、本実施形態に係る弱雨条件の一例である。つまり、弱雨が観測される場合（ステップＳ２１０においてＹＥＳ）、弱雨条件が成立する。この場合、ＣＰＵ５１は、ステップＳ２０５へ処理を移し、待避フラグを立てる。これにより、待避動作が実行される。アレイ１が待避姿勢をとると、受光面１ａへの雨の付着が防止され、結果として受光面１ａの汚れが防止される。待避フラグが立てられた後、ＣＰＵ５１はステップＳ２０７、Ｓ２０８の処理を実行し、降水状態判定処理を終了する。 On the other hand, if rain has been observed (YES in step S209), CPU 51 determines whether or not the observed rain is light rain (step S210). That is, in the process of step S210, it is determined whether the precipitation intensity detected by the precipitation sensor 703 is equal to or less than a predetermined value, for example, 1 mm / h. If the precipitation intensity is equal to or less than the predetermined value, the observed rain is determined to be light rain, and if the precipitation intensity is higher than the predetermined value, the observed rain is determined to be heavy rain. The fact that the observed rain is light rain is an example of the light rain condition according to the present embodiment. That is, when light rain is observed (YES in step S210), the light rain condition is satisfied. In this case, the CPU 51 shifts the processing to step S205 and sets a save flag. As a result, a retreat operation is performed. When the array 1 is in the retracted posture, the adhesion of rain to the light receiving surface 1a is prevented, and as a result, the light receiving surface 1a is prevented from being stained. After the evacuation flag is set, the CPU 51 executes the processing of steps S207 and S208, and ends the precipitation state determination processing.
　観測された雨が弱雨ではない、即ち、強雨の場合には（ステップＳ２１０においてＮＯ）、ＣＰＵ５１はステップＳ２０８へ処理を移し、待避フラグを倒す。観測された雨が強雨であることは、本実施形態に係る強雨条件の一例である。つまり、強雨が観測される場合、強雨条件が成立する。この場合、待避フラグが倒されることで、待避動作が実行されず、アレイ１の姿勢が太陽追尾姿勢となる。これにより、受光面１ａの汚れを雨で洗い流すことができる。待避フラグが倒された後、ＣＰＵ５１は降水状態判定処理を終了する。 (4) If the observed rain is not light rain, that is, if it is heavy rain (NO in step S210), the CPU 51 shifts the processing to step S208 and turns off the evacuation flag. The fact that the observed rain is heavy rain is an example of the heavy rain condition according to the present embodiment. That is, when heavy rain is observed, the heavy rain condition is satisfied. In this case, when the evacuation flag is defeated, the evacuation operation is not performed, and the attitude of the array 1 becomes the sun tracking attitude. Thereby, the dirt on the light receiving surface 1a can be washed away with rain. After the evacuation flag is defeated, the CPU 51 ends the precipitation condition determination process.
　〔本実施形態に係る太陽光発電装置の制御方法の性能評価〕
　発明者は、本実施形態に係る太陽光発電装置の制御方法の性能を評価した。以下、実施した評価について説明する。 [Performance evaluation of the control method of the photovoltaic power generator according to the present embodiment]
The inventor evaluated the performance of the control method for the photovoltaic power generator according to the present embodiment. Hereinafter, the performed evaluation will be described.
　《降水前後における発電性能の変化》
　発明者は、アレイ１の受光面１ａが弱雨で濡れた場合の性能の変化を調べた。図９は、弱雨の前後における太陽光発電パネルの発電性能の変化の一例を示すグラフである。図９において、縦軸は発電性能を示しており、この発電性能は、日中の所定時間内に計測された定格出力（ｋＷ）に対する実出力（ｋＷ）の割合を日射量で規格化して比較した値である。降水前の受光面１ａが汚れていない状態では、約８５％の発電性能を示しているが、降水後では、受光面１ａの汚れによって約７０％まで発電性能が落ちている。清掃後は受光面１ａから汚れが取り除かれたため、降水前と同等の水準まで発電性能が回復している。この例に示されるように、弱雨によって受光面１ａに汚れが付着すると、発電性能が急激に低下する。 《Changes in power generation performance before and after precipitation》
The inventor examined a change in performance when the light receiving surface 1a of the array 1 was wet by light rain. FIG. 9 is a graph illustrating an example of a change in the power generation performance of the photovoltaic power generation panel before and after light rain. In FIG. 9, the vertical axis indicates the power generation performance, and the power generation performance is compared by normalizing the ratio of the actual output (kW) to the rated output (kW) measured within a predetermined time during the day by the amount of solar radiation. Value. When the light receiving surface 1a is not contaminated before the precipitation, the power generation performance is approximately 85%. However, after the precipitation, the power generation performance is reduced to approximately 70% due to the contamination on the light receiving surface 1a. After the cleaning, dirt was removed from the light receiving surface 1a, so that the power generation performance was restored to the same level as before the precipitation. As shown in this example, when dirt adheres to the light receiving surface 1a due to light rain, the power generation performance rapidly decreases.
　《強雨によるクリーニング効果》
　強雨が降った場合にアレイ１に太陽追尾姿勢をとらせることで受光面１ａの汚れが洗い流され、クリーニング効果が生じる。図１０は、強雨の前後における太陽光発電パネルの発電性能の変化の一例を示すグラフである。図１０において、縦軸は発電性能を示している。また、図１０に示す例は、約６０ｍｍ／ｈの降水強度の雨が降った場合の発電性能の変化である。図１０に示されるように、降水前の発電性能は約８４％であり、降水後の発電性能は約８８％であった。したがって、強雨によって受光面１ａの汚れが洗い流された結果、発電性能が約４％上昇した。 《Cleaning effect by heavy rain》
By causing the array 1 to take a sun tracking posture when heavy rain falls, dirt on the light receiving surface 1a is washed away, and a cleaning effect is produced. FIG. 10 is a graph illustrating an example of a change in the power generation performance of the solar power generation panel before and after heavy rain. In FIG. 10, the vertical axis indicates the power generation performance. Further, the example shown in FIG. 10 is a change in power generation performance when a rainfall with a precipitation intensity of about 60 mm / h falls. As shown in FIG. 10, the power generation performance before the precipitation was about 84%, and the power generation performance after the precipitation was about 88%. Therefore, as a result of the dirt on the light receiving surface 1a being washed away by the heavy rain, the power generation performance was increased by about 4%.
　《待避動作による発電ロスの評価》
　受光面１ａが弱雨にさらされることを避けるため待避動作を実行すると、発電量の損失が生じる。そこで発明者は、１日における待避動作による発電量のロスを評価した。この評価では、降水を観測した時間及びその前後３０分については、待避動作によりアレイ１に待避姿勢をとらせたことを想定し、発電量を０とした。下表は、１日の発電量の実測値と、待避動作を行うことを想定した場合の発電量の推定値とを比較する表である。表１において、「実測発電量」は発電量の実測値を示し、「推定発電量」は発電量の推定値を示す。表１に示されるように、評価の対象とした日では、１０：４０～１０：５０、及び１４：５０～１５：００において降水が観測されている。そのため、１０：１０～１１：２０、及び１４：２０～１５：３０において待避動作が行われ、アレイ１が待避姿勢をとったと想定し、この間の発電量が０と推定されている。
Figure JPOXMLDOC01-appb-T000001
 << Evaluation of power generation loss due to evacuation operation >>
If the evacuation operation is performed to prevent the light receiving surface 1a from being exposed to light rain, a loss of power generation occurs. Then, the inventor evaluated the loss of the power generation amount due to the evacuation operation in one day. In this evaluation, the power generation amount was set to 0 for the time when the precipitation was observed and for 30 minutes before and after that, assuming that the array 1 took the evacuation posture by the evacuation operation. The following table is a table for comparing the measured value of the power generation amount per day with the estimated value of the power generation amount assuming that the evacuation operation is performed. In Table 1, “measured power generation amount” indicates an actually measured value of the power generation amount, and “estimated power generation amount” indicates an estimated value of the power generation amount. As shown in Table 1, precipitation was observed from 10:40 to 10:50 and from 14:50 to 15:00 on the day of evaluation. Therefore, the evacuation operation is performed at 10:10 to 11:20 and 14:20 to 15:30, and it is assumed that the array 1 has assumed the evacuation posture, and the power generation amount during this period is estimated to be zero.
Figure JPOXMLDOC01-appb-T000001
　次の表に、評価結果を示す。この表では、評価対象の１日の直達日射量、実測発電量、及び推定発電量のそれぞれの合計が示される。
Figure JPOXMLDOC01-appb-T000002
 The following table shows the evaluation results. In this table, the total of each of the direct solar radiation amount, the measured power generation amount, and the estimated power generation amount for one day to be evaluated is shown.
Figure JPOXMLDOC01-appb-T000002
　待避動作による発電量のロスは（実測発電量－推定発電量）として得られ、１３．３ｋＷｈ／ｄａｙとなる。 ロ ス The loss of power generation due to the evacuation operation is obtained as (actually measured power generation-estimated power generation), and is 13.3 kWh / day.
　《待避動作による汚れ防止効果に伴う発電量増加の評価》
　次表には、降水によって受光面１ａに汚れが発生した直後と、受光面１ａを清掃することによって発電性能が回復した場合とにおける発電量が示される。この表では、「降水後」が受光面１ａに汚れが発生した直後を、「清掃後」が受光面１ａを清掃した直後を示している。
Figure JPOXMLDOC01-appb-T000003
 << Evaluation of power generation increase due to dirt prevention effect by evacuation operation >>
The following table shows the amount of power generation immediately after the light receiving surface 1a is contaminated by precipitation and when the power generation performance is restored by cleaning the light receiving surface 1a. In this table, "after precipitation" indicates immediately after the light receiving surface 1a is stained, and "after cleaning" indicates immediately after the light receiving surface 1a is cleaned.
Figure JPOXMLDOC01-appb-T000003
　表３では、「降水後」と「清掃後」との間で直達日射量が異なり、単純に比較はできない。そこで、降水後の発電性能で、清掃後と同じ９．４４ｋＷ／ｍ２／ｄａｙの直達日射量があった場合の発電量を次のように見積もる。
１９８．４×（９．４４／１０．４）＝１７９．６［ｋＷｈ／ｄａｙ］
　ここで、待避動作によって、清掃直後と同等の発電性能が得られることを想定する。この場合、待避動作による汚れ防止効果によって増加する発電量は、次のようになる。
２２２．３－１７９．６＝４２．７［ｋＷｈ／ｄａｙ］ In Table 3, the amount of direct solar radiation differs between "after precipitation" and "after cleaning", and cannot be simply compared. Therefore, in the power generation performance after precipitation, the power generation amount in the case where there is a direct solar radiation of 9.44 kW / m 2 / day same as that after cleaning is estimated as follows.
198.4 × (9.44 / 10.4) = 179.6 [kWh / day]
Here, it is assumed that a power generation performance equivalent to that immediately after cleaning is obtained by the retreat operation. In this case, the amount of power generation that increases due to the dirt prevention effect of the retreat operation is as follows.
222.3-179.6 = 42.7 [kWh / day]
　以上より、待避動作によって１３．３ｋＷｈ／ｄａｙの発電量が失われる代わりに、４２．７ｋＷｈ／ｄａｙの発電量を確保することができる。発電量の損失に比べて、確保できる発電量は十分に高く、本実施形態に係る太陽光発電装置の制御方法が有効であることがわかる。 From the above, it is possible to secure a power generation amount of 42.7 kWh / day instead of losing a power generation amount of 13.3 kWh / day by the retreat operation. The amount of power generation that can be secured is sufficiently high compared to the loss of power generation, and it can be seen that the control method of the solar power generation device according to the present embodiment is effective.
　〔変形例〕
　上記の実施形態では、外部の機関によって一定以下の降水強度の降水が予測された場合と、太陽光発電装置１００に設けられた降水センサ７０３によって弱雨が観測された場合との両方において、弱雨条件が成立することとしたが、これに限定されるものではない。太陽光発電装置１００が外部データソース９に接続されていなかったり、外部データソース９から降水状態の判定に適した気象情報が提供されなかったりする場合には、降水センサ７０３による降水の観測のみによって、弱雨条件が成立したか否かを判定することができる。また、降水センサ７０３が設けられない等の場合には、外部データソース９から提供される気象情報のみによって、弱雨条件が成立したか否かを判定することができる。 (Modification)
In the above-described embodiment, both the case where the rainfall of a predetermined or less rainfall is predicted by an external organization and the case where the light rain is observed by the precipitation sensor 703 provided in the photovoltaic power generator 100 are both low. Although it was determined that the rain condition was satisfied, the present invention is not limited to this. When the photovoltaic power generation device 100 is not connected to the external data source 9 or when the external data source 9 does not provide weather information suitable for the determination of the precipitation state, the precipitation sensor 703 only monitors the precipitation. It can be determined whether the light rain condition has been satisfied. In the case where the precipitation sensor 703 is not provided or the like, it can be determined whether or not the light rain condition has been satisfied only by the weather information provided from the external data source 9.
　〔補記〕
　なお、今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は請求の範囲によって示され、請求の範囲と均等の意味及び範囲内での全ての変更が含まれることが意図される。 (Supplementary note)
It should be noted that the embodiments disclosed this time are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
　１　アレイ
　２　支持装置
　５　制御部
　６　駆動装置
　９　外部データソース
　１１　架台
　１３　ボックス
　１ａ　受光面
　１Ｍ　集光型太陽光発電モジュール
　２１　支柱
　２２　基礎
　２３　２軸駆動部
　２４　水平軸
　３１　筐体
　３２　集光部
　３３　フレキシブルプリント配線板
　３４　セルパッケージ
　３５　２次レンズ
　３６　保護板
　３７　遮蔽板
　３８　セル
　３９　樹脂
　５１　ＣＰＵ
　５２　メモリ
　５３　Ａ／Ｄコンバータ
　１００　太陽光発電装置
　２３ａ，２３ｅ　モータ
　３２ａ　ガラス板
　３２ｆ　集光レンズ
　３７ａ　開口
　５２ａ　制御プログラム
　７０１　追尾センサ
　７０２　日射センサ
　７０３　降水センサ
　７０４　電力センサ
  Reference Signs List 1 array 2 support device 5 control unit 6 drive device 9 external data source 11 gantry 13 box 1a light receiving surface 1M concentrating photovoltaic power generation module 21 support 22 foundation 23 two-axis drive unit 24 horizontal axis 31 housing 32 light collection unit 33 Flexible printed wiring board 34 Cell package 35 Secondary lens 36 Protective plate 37 Shielding plate 38 Cell 39 Resin 51 CPU
52 Memory 53 A / D converter 100 Photovoltaic power generator 23a, 23e Motor 32a Glass plate 32f Condensing lens 37a Opening 52a Control program 701 Tracking sensor 702 Solar radiation sensor 703 Precipitation sensor 704 Power sensor

Claims (7)

  1. 　受光面を有する太陽光発電パネルと、
    　前記太陽光発電パネルの姿勢を変化させる駆動装置と、
    　日中において所定の弱雨条件が成立する場合に、前記太陽光発電パネルの姿勢を、前記太陽光発電パネルの受光面が下向きとなる待避姿勢へと変化させる待避動作を前記駆動装置に実行させる制御部と、
    　を備える太陽光発電装置。     A photovoltaic panel having a light receiving surface,
    A driving device for changing the attitude of the photovoltaic panel,
    When a predetermined light rain condition is satisfied during the day, the driving device performs a retreat operation of changing the attitude of the solar power panel to a retreat attitude in which a light receiving surface of the solar panel faces downward. A control unit;
    A solar power generation device comprising:
  2. 　前記弱雨条件は、降水強度、降水量、及び雲量のうちの少なくとも１つに基づく条件である、
    　請求項１に記載の太陽光発電装置。     The light rain condition is a condition based on at least one of precipitation intensity, precipitation, and cloudiness.
    The solar power generation device according to claim 1.
  3. 　前記弱雨条件は、弱雨が予測される条件であり、
    　前記制御部は、前記弱雨が予測される時刻の所定時間前に、前記待避動作を前記駆動装置に開始させる、
    　請求項１又は請求項２に記載の太陽光発電装置。     The light rain condition is a condition in which light rain is predicted,
    The control unit causes the driving device to start the evacuation operation a predetermined time before the time when the light rain is predicted,
    The solar power generation device according to claim 1 or 2.
  4. 　前記制御部は、日中において前記弱雨条件とは異なる強雨条件が成立する場合に、前記待避動作を前記駆動装置に回避させる、
    　請求項１から請求項３の何れか１項に記載の太陽光発電装置。     The controller, when a heavy rain condition different from the light rain condition is satisfied in the daytime, causes the driving device to avoid the evacuation operation,
    The photovoltaic power generator according to any one of claims 1 to 3.
  5. 　前記制御部は、日中において前記太陽光発電パネルが前記待避姿勢をとっており、且つ、前記弱雨条件が成立しない場合に、前記待避姿勢を解除する解除動作を前記駆動装置に実行させる、
    　請求項１から請求項４の何れか１項に記載の太陽光発電装置。     The control unit, during the daytime, the photovoltaic panel is in the standby position, and, when the light rain condition is not satisfied, causes the drive device to execute a release operation to release the standby position,
    The photovoltaic power generator according to any one of claims 1 to 4.
  6. 　前記駆動装置は、前記太陽光発電パネルが太陽を追尾する太陽追尾動作を実行可能であり、
    　前記制御部は、前記太陽追尾動作を実行している前記駆動装置に前記待避動作を実行させる場合、前記駆動装置に前記太陽追尾動作から前記待避動作へ切り替えさせる、
    　請求項１から請求項５の何れか１項に記載の太陽光発電装置。     The driving device is capable of executing a solar tracking operation in which the solar power generation panel tracks the sun,
    When the control unit causes the driving device that is executing the sun tracking operation to execute the retreat operation, the control unit causes the driving device to switch from the sun tracking operation to the retraction operation.
    The solar power generation device according to any one of claims 1 to 5.
  7. 　太陽光発電パネルの姿勢を変化させる駆動装置に、前記太陽光発電パネルの姿勢を、前記太陽光発電パネルの受光面を太陽に向ける受光姿勢とさせ、
    　日中において所定の弱雨条件が成立する場合に、前記太陽光発電パネルの姿勢を、前記受光姿勢から、前記受光面が下向きとなる待避姿勢へと変化させる待避動作を前記駆動装置に実行させる、
    　太陽光発電装置の制御方法。
          To a driving device that changes the attitude of the photovoltaic power generation panel, the attitude of the photovoltaic power generation panel is set to a light receiving attitude in which the light receiving surface of the photovoltaic power generation panel faces the sun,
    In a case where a predetermined light rain condition is satisfied during the day, the driving device executes a retracting operation of changing the attitude of the solar power generation panel from the light receiving attitude to a retracting attitude in which the light receiving surface faces downward. ,
    A method for controlling a solar power generation device.
PCT/JP2018/029988 2018-08-09 2018-08-09 Solar power generation device and method for controlling solar power generation device WO2020031349A1 (en)

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