Photovoltaic power generation system, and charging control method thereof

Abstract

To provide a photovoltaic power generation system capable of storing electricity responding to sudden changes in weather that cannot be predicted by weather forecasts.SOLUTION: A photovoltaic power generation system 100 includes: a first PV panel 1 installed in a first region R1; and a control unit 2. The control unit 2 includes: an acquisition unit 21 for acquiring a first physical quantity that includes the amount of power generated per unit time by a second PV panel 3 installed in a second region R2 adjacent to the first region R1 and a physical quantity that is correlated therewith; and a prediction unit 22 that predicts changes in the power generation of the first PV panel 1 in the future based on the first physical quantity.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a solar power generation system and the like. [Background technology]

[0002] In recent years, interest in energy-saving homes equipped with solar power generation systems has been growing due to tight electricity supply and demand, unstable energy prices, etc. For example, Patent Document 1 listed below discloses a solar cell system that stores electricity using nighttime electricity based on the weather forecast for the next day. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 2612639 Summary of the Invention [Problem to be solved by the invention]

[0004] Although the accuracy of weather forecasts is improving year by year, it is still difficult to predict sudden changes in the weather, such as sudden showers or sudden downpours, and further improvements are needed.

[0005] The present invention was devised in consideration of the above-mentioned circumstances, and its main object is to provide a solar power generation system or the like that can store electricity and respond to sudden changes in weather that cannot be predicted by weather forecasts. [Means for solving the problem]

[0006] The present invention is a solar power generation system, a first PV panel installed in a first area and a control device; The control device an acquisition unit for acquiring a first physical quantity including a power generation amount per unit time of a second PV panel installed in a second area adjacent to the first area or a physical quantity correlated therewith; and a prediction unit that predicts a future change in the amount of power generated by the first PV panel based on the first physical quantity. [Effects of the Invention]

[0007] By employing the above-described configuration, the solar power generation system of the present invention can respond to sudden changes in weather that cannot be predicted by weather forecasts. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a block diagram showing an embodiment of a solar power generation system according to the present invention. [Figure 2] 10 is a graph showing the transition of the amount of power generated on the same day by the first PV panel and the second PV panel 3 in the photovoltaic power generation system. [Figure 3] FIG. 10 is a block diagram showing a modified example of the solar power generation system. [Figure 4] 10 is a flowchart illustrating an example of a processing procedure of a method for proposing a photovoltaic power generation device. [Figure 5] FIG. 10 is a block diagram showing another modified example of the solar power generation system. [Figure 6] FIG. 3 is a diagram showing the positional relationship between a first PV panel and a plurality of second PV panels, and the amount of power generated by each second PV panel. [Figure 7] Continuing from FIG. 6, this is a diagram showing the transition of the amount of power generated by each second PV panel over time. [Figure 8] 8 is a diagram showing the transition of the amount of power generated by each second PV panel over time, following FIG. 7. [Figure 9] FIG. 10 is a diagram showing how a prediction unit predicts future changes in the amount of power generated by the first PV panel. [Figure 10] FIG. 10 is a diagram showing a modified example of how the prediction unit predicts future changes in the amount of power generated by the first PV panel. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be understood that the drawings include exaggerated representations and representations that differ from the dimensional ratios of actual structures in order to facilitate understanding of the contents of the invention. Furthermore, identical or common elements are designated by the same reference numerals throughout the embodiments, and redundant explanations will be omitted. Furthermore, the specific configurations shown in the embodiments and drawings are for the purpose of understanding the contents of the present invention, and the present invention is not limited to the specific configurations shown in the drawings.

[0010] 1 shows a schematic configuration of a solar power generation system 100 according to this embodiment. The solar power generation system 100 includes a first PV (Photovoltaic) panel 1 and a control device 2.

[0011] PV panels have the function of receiving light such as sunlight and generating electricity. A first PV panel 1 is installed in a first region R1. The first PV panel 1 is mounted, for example, on the roof of a house, apartment building, building, factory, etc. (hereinafter referred to as a house, etc.) within the first region R1.

[0012] The control device 2 controls the photovoltaic power generation system 100. For example, a server device of a management company of the photovoltaic power generation system 100 is used as the control device 2. The server device has, for example, a CPU (Central Processing Unit) that executes various types of arithmetic processing, information processing, etc., a memory and a magnetic disk that store programs that control the operation of the CPU and various types of information, and communication means for performing various types of communication with the first PV panel 1 and a second PV panel 3 (described later), etc.

[0013] The area in which the control device 2 is installed is not particularly limited. In FIG. 1, the control device 2 is shown installed outside the first area R1. The control device 2 may be installed in the first area R1. The control device 2 may also be installed in a second area R2, which will be described later, or may be installed outside the second area R2.

[0014] The control device 2 includes an acquisition unit 21 and a prediction unit 22.

[0015] The acquisition unit 21 acquires a first physical quantity including the amount of power generated per unit time by the second PV panel 3 installed in the second region R2.

[0016] Here, the term "second region R2" refers to a region adjacent to the first region R1. The region adjacent to the first region R1 refers to a region outside the first region R1 that is at a distance that is useful for predicting future power generation of the first PV panel 1. In other words, the region adjacent to the first region R1 refers to a region that is at a distance that allows, for example, the current weather in that region to be correlated with the weather in the first region R1 several hours later.

[0017] The second PV panel 3 is mounted, for example, on the roof of a house or the like in the second region R2. The second PV panel 3 itself may or may not be included in the solar power generation system 100.

[0018] The acquisition unit 21 of the control device 2 and the second PV panel 3 are connected via a wired or wireless network including, for example, the Internet 10. As long as the acquisition unit 21 can acquire the amount of power generated per unit time by the second PV panel 3, the connection form between the acquisition unit 21 and the second PV panel 3 is not particularly limited.

[0019] The first physical quantity acquired by the acquisition unit 21 may include a physical quantity correlated with the amount of power generation instead of or in addition to the amount of power generation. Examples of the physical quantity correlated with the amount of power generation include the amount of solar radiation in the area, as well as the temperature, the amount of precipitation, and the surface temperature of the second PV panel 3.

[0020] 2 shows the transition of the amount of power generated on the same day by the first PV panel 1 in the solar power generation system 100 of FIG. 1 and the second PV panel 3 installed in an area approximately 15 km away from the first PV panel 1. In this figure, in order to correct the scale (power generation capacity) of the second PV panel 3 and the first PV panel 1, the amount of power generated per unit of installation and per unit of time (simply referred to as power generation amount in this specification) is shown.

[0021] 2, the amount of power generation in the second region R2 where the second PV panel 3 is installed drops around 10:00, while the amount of power generation in the first region R1 where the first PV panel 1 is installed drops around 11:00. This is because the weather in the first region R1 worsens (the amount of solar radiation decreases) approximately one hour later than in the second region R2. Therefore, it can be understood that by monitoring the second PV panel 3 installed in the second region R2, it is possible to predict future weather in the first region R1, i.e., changes in the amount of power generation by the first PV panel 1, using the decrease in the amount of power generation by the second PV panel 3 as a trigger.

[0022] The prediction unit 22 predicts future changes in the amount of power generated by the first PV panel 1 based on the first physical quantity acquired by the acquisition unit 21. This makes it possible to respond to sudden changes in weather that cannot be predicted by weather forecasts.

[0023] Fig. 3 is a block diagram of a solar power generation system 101 which is a modified example of the solar power generation system 100 in Fig. 1. For parts of the solar power generation system 101 that are not described below, the configuration of the solar power generation system 100 described above can be adopted.

[0024] 3, the solar power generation system 101 may further include a storage battery 4 and a charge control unit 5. The storage battery 4 is installed, for example, within the premises of a house or the like on which the first PV panel 1 is installed.

[0025] The storage battery 4 stores the power generated by the first PV panel 1. The storage battery 4 is installed, for example, on the premises of a house or the like on which the first PV panel 1 is installed. The power stored in the storage battery 4 is consumed by the house or the like.

[0026] The power generated by the first PV panel 1 is used for self-consumption by the home, etc., in addition to charging the storage battery 4. If the power generated by the first PV panel 1 exceeds the self-consumption, the power is sold to the power company, etc., as surplus power.

[0027] Furthermore, the storage battery 4 may be a stationary storage battery or an on-board storage battery mounted on an electric vehicle (EV). In this case, the on-board storage battery of the electric vehicle is charged with the power generated by the first PV panel 1.

[0028] The charge control unit 5 is installed, for example, on the premises of a house or the like where the first PV panel 1 is installed. If the house or the like employs a Home Energy Management System (HEMS) or an equivalent system, an EMS controller within the system may be applied as the charge control unit 5. Furthermore, depending on the object where the first PV panel 1 is installed, an EMS controller within a MEMS for a condominium, a BEMS for a building, an FEMS for a factory, or a CEMS for a community may be applied.

[0029] The charging control unit 5 is connected to the control device 2. When the control device 2 is located away from the charging control unit 5, i.e., in a location remote from the first region R1, the charging control unit 5 and the control device 2 may be connected via a wired or wireless network including, for example, the Internet 10.

[0030] For example, when a predetermined timing for charging the storage battery 4 arrives, the charge control unit 5 charges the storage battery 4 with the power generated by the first PV panel 1. The "charging timing" is set, for example, to a daytime period when the amount of power generated by the first PV panel 1 increases.

[0031] Furthermore, the charge control unit 5 of the present photovoltaic power generation system 101 controls the charging of the storage battery 4 based on the prediction result of the prediction unit 22. This makes it possible to optimize the amount of electricity stored in the storage battery 4 in preparation for future changes in the amount of power generated by the first PV panel 1.

[0032] In the solar power generation system 101, the prediction unit 22 and the charge control unit 5 are preferably configured as follows.

[0033] The prediction unit 22 monitors the first physical quantity acquired by the acquisition unit 21. Then, when the first physical quantity acquired from at least some of the second PV panels 3 falls below a predetermined threshold, the prediction unit 22 predicts that there is a risk that the amount of power generation of the first PV panel 1 will decrease in the future. Then, the prediction unit 22 outputs a first signal S to the charge control unit 5. In other words, the first signal S is an alert signal indicating that there is a risk that the amount of power generation of the first PV panel 1 will decrease in the future.

[0034] The threshold value is preferably determined based on the average power generation amount of the second PV panel 3 during clear weather over a predetermined period in the past (e.g., one month). In this configuration, the threshold value is determined based on the average power generation amount taking seasonal fluctuations into consideration. The average power generation amount is calculated and stored by the prediction unit 22.

[0035] For calculating the average power generation amount, the prediction unit 22 stores the past power generation amount of the second PV panel 3. It is desirable that the average power generation amount be updated periodically.

[0036] The threshold is determined as a ratio to the average power generation amount, more specifically, it is set to about 80% of the average power generation amount.

[0037] When the charge control unit 5 receives the first signal S from the prediction unit 22, it starts charging the storage battery 4. For example, if the charge control unit 5 receives the first signal S while part of the power generated by the first PV panel 1 is being sold as surplus power, the charge control unit 5 stops selling part or all of the surplus power and starts charging the storage battery 4. This makes it possible to charge the storage battery 4 with the surplus power in preparation for a future decrease in the amount of power generated by the first PV panel 1, and to optimize the amount of power stored in the storage battery 4.

[0038] The charge control unit 5 may be configured to advance a predetermined timing for charging the storage battery 4 instead of immediately starting charging the storage battery 4 when receiving the first signal S from the prediction unit 22. Even with this configuration, it is possible to charge the storage battery 4 using surplus power in preparation for a future decrease in the amount of power generated by the first PV panel 1, and to optimize the amount of power stored in the storage battery 4.

[0039] Depending on the information processing capability of the charging control unit 5, the configuration and functions of the control device 2 may be integrated. That is, the functions of the acquiring unit 21 and the predicting unit 22 may be realized in the charging control unit 5.

[0040] Similar to the first PV panel 1, the second PV panel 3 may be connected to the storage battery 4 via the charge control unit 5. The charge control unit 5 and the storage battery 4 connected to the second PV panel 3 are located in a second region R2. In this case, the first PV panel 1 can serve as the second PV panel 3, and the second PV panel 3 can serve as the first PV panel 1.

[0041] Incidentally, weather changes often spread from western regions to eastern regions. Therefore, in the solar power generation system 100 and the solar power generation system 101, it is desirable that the second region R2 be set to an area located west of the first region R1.

[0042] This makes it easy for the prediction unit 22 to predict future changes in the amount of power generated by the first PV panel 1, even when the number of second PV panels 3 included in the photovoltaic power generation systems 100 and 101 is small. For example, it may be possible to appropriately predict changes in the amount of power generated by the first PV panel 1 from the first physical quantity acquired from a single second PV panel 3.

[0043] 4 shows the procedure of the charge control method 200 of the present invention. In the following description of the charge control method 200, an example using the above-described solar power generation system 101 will be shown, but the present invention is not limited to this.

[0044] The charging control method 200 includes an obtaining step S1, a predicting step S2, and a charging control step S3.

[0045] In the acquisition step S1, a first physical quantity of the second PV panel 3 is acquired. The acquisition step S1 is executed by the acquisition unit 21, for example.

[0046] The second PV panel 3 is installed in a second region R2 (see FIG. 3). The second region R2 is an area adjacent to the first region R1. The first physical quantity includes the amount of power generated per unit time by the second PV panel 3 or a physical quantity correlated therewith.

[0047] In the prediction step S2, a future decrease in the amount of power generation of the first PV panel 1 is predicted based on the first physical quantity. The decrease in the amount of power generation of the first PV panel 1 is predicted by the prediction unit 22, for example.

[0048] A first PV panel 1 is installed in a first region R1 (see FIG. 3).

[0049] In the charge control step S3, the charging of the storage battery 4 with the power obtained by the first PV panel 1 is controlled based on the result of the prediction step S2. For example, if it is predicted that the amount of power generated by the first PV panel 1 may decrease in the future, charging of the storage battery 4 is started immediately, or the predetermined timing for charging the storage battery 4 is advanced. This makes it possible to charge the storage battery 4 with surplus power in preparation for a future decrease in the amount of power generated by the first PV panel 1, and to optimize the amount of power stored in the storage battery 4.

[0050] Fig. 5 is a block diagram of a solar power generation system 102 which is another modified example of the solar power generation system 100 in Fig. 1. For parts of the solar power generation system 102 not described below, the configuration of the solar power generation system 100 or the solar power generation system 101 described above can be adopted.

[0051] In the photovoltaic power generation system 102, the second PV panels 3 are installed in multiple regions within the second region R2. In Fig. 5 and Fig. 6 and subsequent figures described below, some of the second PV panels 3 are labeled with reference numerals.

[0052] Each second PV panel 3 is connected to the control device 2. The second PV panels 3 and the control device 2 can be easily connected via a wired or wireless network including the Internet 10 or the like.

[0053] In the above-mentioned HEMS, the PV panels installed in each home are typically connected to a control device provided by an energy management system company via a HEMS controller. In such a system, the control device monitors the power generation status of the PV panels installed in each home. Therefore, by applying some of the configurations and functions of the system to the first PV panel 1, the control device 2, and the second PV panel 3, a photovoltaic power generation system 102 can be easily and inexpensively constructed.

[0054] In the photovoltaic power generation system 102, the acquisition unit 21 acquires the first physical quantity from each of the plurality of second PV panels 3. Then, the prediction unit 22 predicts future changes in the amount of power generated by the first PV panel 1 based on the first physical quantities of the second PV panels 3 in the plurality of regions. This makes it possible to accurately predict changes in the amount of power generated, and further optimize the amount of power stored in the storage battery 4.

[0055] Generally, the accuracy of predicting the change in the amount of power generation increases as the number of second PV panels 3 connected to the control device 2 increases. However, if the number of second PV panels 3 becomes excessively large, there is a risk of delays in the processing of the control device 2. Therefore, the second region R2 may be set according to the processing capacity of the control device 2.

[0056] 6 to 8 show, in time series, the positional relationship between the first PV panel 1 and the multiple second PV panels 3, and the transition in the amount of power generated by each second PV panel 3. In Fig. 6 to 8, second PV panels 3 whose amount of power generated is 80 to 90% of the average amount of power generated on clear days over a predetermined period in the past (for example, one year) are shown hatched, and second PV panels 3 whose amount of power generated is less than 80% of the average amount of power generated are shown in black.

[0057] 6 and other figures, the display of the second PV panels 3 is determined by comparing the average power generation amount obtained from each second PV panel 3 with reference thresholds (80% and 90% in the above case). The thresholds for distinguishing the display of the second PV panels 3 are merely an example and are not particularly limited.

[0058] The amount of power generation acquired from the second PV panel 3 is stored, for example, in the acquisition unit 21. The prediction unit 22 calculates and stores the average amount of power generation from the amount of power generation stored in the acquisition unit 21. It is desirable to update the average amount of power generation periodically.

[0059] 6 to 8, the distribution of the second PV panels 3 where power generation is declining can be used to predict future changes in the power generation of the first PV panel 1. For example, from Fig. 6 to Fig. 7, the region where power generation is declining is approaching the first region R1, and it can be predicted, at least as of Fig. 7, that the power generation in the first region R1 will also be declining by the time of Fig. 8.

[0060] That is, in the photovoltaic power generation system 102, the prediction unit 22 predicts whether a decrease in the first physical quantity is progressing toward the first region R1, based on the distance from the first region R1 to each second PV panel 3 and the first physical quantity of the second PV panels 3 installed in the multiple regions. This makes it possible to more accurately predict a decrease in the amount of power generated by the first PV panel 1, and further optimize the amount of power stored in the storage battery 4.

[0061] 9 and 10 show more specific ways in which the prediction unit 22 predicts future changes in the amount of power generated by the first PV panel 1. FIG.

[0062] The prediction unit 22 divides the second region R2 into a plurality of areas R21, R22, and R23 by concentric circles centered on the first region R1. Area R21 is, for example, an area located less than 20 km away from the first region R1. Area R22 is, for example, an area located 20 km to 50 km away from the first region R1. Area R23 is, for example, an area located more than 50 km away from the first region R1.

[0063] The number of divided areas is not particularly limited, and the radius of the concentric circles can also be determined appropriately.

[0064] The prediction unit 22 predicts whether a decrease in the first physical quantity is progressing toward the first region R1, based on the first physical quantity of the multiple areas R21, R22, and R23. This makes it possible to more accurately predict a decrease in the amount of power generated by the first PV panel 1, and further optimize the amount of power stored in the storage battery 4.

[0065] It is desirable that the prediction unit 22 divides the multiple areas R21, R22, and R23 of the second region R2 into multiple quadrant zones based on the direction centered on the first region R1, and predicts future changes in the power generation amount of the first PV panel based on the first physical quantity in each zone.

[0066] 10, the prediction unit 22 further divides each of the areas R21, R22, and R23 of the second region R2 into four quadrants Q1, Q2, Q3, and Q4, with the first region R1 as the origin, the east-west direction as the horizontal axis, and the north-south direction as the vertical axis. Then, the prediction unit 22 predicts future changes in the amount of power generation of the first PV panel 1 based on the first physical quantity of each zone.

[0067] For example, when the area where the power generation of the second PV panel 3 is decreasing moves from area R23 in the third quadrant Q3 to area R22 in the third quadrant Q3 and then to area R21 in the third quadrant Q3, the weather in the first area R1 is worsening and a future decrease in the power generation of the first PV panel 1 is predicted.

[0068] On the other hand, when the area where the power generation of the second PV panel 3 is declining moves from area R23 in the third quadrant Q3 to area R22 in the fourth quadrant Q4, the weather in the first area R1 is likely to remain the same and is predicted not to have a significant impact on the power generation of the first PV panel 1 in the future.

[0069] This makes it possible to more accurately predict a decrease in the amount of power generated by the first PV panel 1, and further optimize the amount of power stored in the storage battery 4. The second region R2 may be divided into four or more quadrant zones.

[0070] Although a particularly preferred embodiment of the present invention has been described in detail above, the present invention is not limited to the illustrated embodiment and can be modified and implemented in various ways.

[0071] [Note] The present invention includes the following aspects.

[0072] [Invention 1] A solar power generation system, a first PV panel installed in a first area and a control device; The control device an acquisition unit for acquiring a first physical quantity including a power generation amount per unit time of a second PV panel installed in a second area adjacent to the first area or a physical quantity correlated therewith; a prediction unit that predicts a future change in the amount of power generated by the first PV panel based on the first physical quantity, Solar power generation system. [Invention 2] a storage battery for storing the power generated by the first PV panel; The photovoltaic power generation system according to aspect 1, further comprising a charge control unit that controls charging of the storage battery based on the prediction result of the prediction unit. [Invention 3] the prediction unit outputs a first signal to the charge control unit when the first physical quantity falls below a predetermined threshold; The photovoltaic power generation system according to aspect 2, wherein the charge control unit, upon receiving the first signal, starts charging the storage battery or advances a predetermined timing for charging the storage battery. [Invention 4] A photovoltaic power generation system according to aspect 3, wherein the threshold value is determined based on an average amount of power generated on clear skies during a predetermined period in the past. [Invention 5] 5. The photovoltaic power generation system according to any one of inventions 1 to 4, wherein the second area is an area located west of the first area. [Invention 6] the acquisition unit acquires the first physical quantity from each of the second PV panels installed in a plurality of areas in the second region; 6. The photovoltaic power generation system according to any one of claims 1 to 5, wherein the prediction unit predicts future changes in the amount of power generated by the first PV panel based on the first physical quantity of the plurality of regions. [Invention 7] The photovoltaic power generation system according to any one of claims 1 to 6, wherein the prediction unit predicts whether a decrease in the first physical quantity is progressing toward the first area, based on a distance from the first area to each of the second PV panels and each of the first physical quantities. [Invention 8] The photovoltaic power generation system according to any one of claims 1 to 7, wherein the prediction unit divides the second region into a plurality of areas by concentric circles centered on the first region, and predicts future changes in the amount of power generated by the first PV panel based on a first physical quantity of the plurality of areas. [Invention 9] The photovoltaic power generation system according to claim 7 or 8, wherein the prediction unit divides the plurality of areas into a plurality of quadrants based on a direction centered on the first region, and predicts a future change in the amount of power generated by the first PV panel based on a first physical quantity of each area. [Invention 10] an acquisition step of acquiring a first physical quantity including a power generation amount per unit time of a second PV panel installed in a second area adjacent to the first area or a physical quantity correlated therewith; a prediction step of predicting a future decrease in power generation amount of a first PV panel installed in the first area based on the first physical quantity; a charge control step of controlling charging of the power obtained by the first PV panel to a storage battery based on a result of the prediction step; A method for controlling charging in a solar power generation system. [Explanation of symbols]

[0073] 1: First PV panel 2: Control device 3: Second PV panel 4: Storage battery 5: Charging control unit 21: Acquisition part 22: Prediction section 100: Solar power generation system 101: Solar power generation system 102: Solar power generation system 200:Charging control method R1: Region 1 R2: Second region S: First signal S1: Acquisition step S2: Prediction step S3: Charging control step

Claims

1. A solar power generation system, a first PV panel installed in a first area and a control device; The control device an acquisition unit for acquiring a first physical quantity including a power generation amount per unit time of a second PV panel installed in a second area adjacent to the first area or a physical quantity correlated therewith; a prediction unit that predicts a future change in the amount of power generated by the first PV panel based on the first physical quantity, Solar power generation system.

2. a storage battery for storing the power generated by the first PV panel; The solar power generation system according to claim 1 , further comprising: a charge control unit that controls charging of the storage battery based on a prediction result of the prediction unit.

3. the prediction unit outputs a first signal to the charge control unit when the first physical quantity falls below a predetermined threshold; The solar power generation system according to claim 2 , wherein, upon receiving the first signal, the charge control unit starts charging the storage battery or advances a predetermined timing for charging the storage battery.

4. The photovoltaic power generation system according to claim 3 , wherein the threshold value is determined based on an average amount of power generated on clear skies during a predetermined period in the past.

5. The photovoltaic power generation system according to claim 1 , wherein the second region is located west of the first region.

6. the acquisition unit acquires the first physical quantity from each of the second PV panels installed in a plurality of areas in the second area; The photovoltaic power generation system according to claim 1 , wherein the prediction unit predicts a future change in the amount of power generated by the first PV panel based on the first physical quantity in the plurality of regions.

7. 7. The solar power generation system according to claim 6, wherein the prediction unit predicts whether a decrease in the first physical quantity is progressing toward the first region based on a distance from the first region to each of the second PV panels and each of the first physical quantities.

8. 8. The solar power generation system according to claim 7, wherein the prediction unit divides the second region into a plurality of areas by concentric circles centered on the first region, and predicts future changes in the amount of power generated by the first PV panel based on a first physical quantity of the plurality of areas.

9. 9. The solar power generation system according to claim 8, wherein the prediction unit divides the plurality of areas into a plurality of quadrants based on a direction centered on the first region, and predicts future changes in the amount of power generated by the first PV panel based on a first physical quantity of each area.

10. an acquisition step of acquiring a first physical quantity including a power generation amount per unit time of a second PV panel installed in a second area adjacent to the first area or a physical quantity correlated therewith; a prediction step of predicting a future decrease in power generation amount of a first PV panel installed in the first area based on the first physical quantity; a charge control step of controlling charging of the power obtained by the first PV panel to a storage battery based on a result of the prediction step; A method for controlling charging in a solar power generation system.

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