Power management system

Abstract

To obtain a power management system capable of grasping a power generation amount generated by a photovoltaic element installed indoors.SOLUTION: A power management system 10 includes a generation power prediction unit 42. The generation power prediction unit 42 can predict a power generation amount of a photovoltaic element based on a stored usage pattern of a light-emitting unit and power generation amount information of the photovoltaic element at the time of light emission of the light-emitting unit.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a power management system. [Background technology]

[0002] Patent Document 1 below discloses an invention related to a distributed energy resource management device. In this distributed energy resource management device, a photovoltaic power generation output prediction unit can predict maximum and minimum output values ​​of photovoltaic power generation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-88177 A Summary of the Invention [Problem to be solved by the invention]

[0004] By the way, solar cells can generate electricity not only from sunlight but also from the light of lighting devices in buildings. In recent years, lightweight and thin solar cells such as perovskite solar cells have been developed, and by installing such photovoltaic elements in a building, it is possible to generate electricity from the light of lighting devices in the building.

[0005] On the other hand, in order to utilize the power generated by photovoltaic power generation elements installed indoors in a planned manner, it is preferable to be able to grasp the amount of power generated by the photovoltaic power generation elements installed indoors.

[0006] However, the above Patent Document 1 does not describe any technology for grasping the amount of electricity generated by a photovoltaic element installed indoors, and the prior art described in the above Patent Document 1 has room for improvement in terms of grasping the amount of electricity generated by a photovoltaic element installed indoors.

[0007] In consideration of the above, an object of the present invention is to provide a power management system that can grasp the amount of power generated by photovoltaic elements installed indoors. [Means for solving the problem]

[0008] The power management system according to the first aspect includes a photovoltaic element capable of generating electricity by receiving light from a light-emitting unit installed inside a building, and a prediction unit that predicts the amount of power generated by the photovoltaic element based on a stored usage pattern of the light-emitting unit and information on the amount of power generated by the photovoltaic element when the light-emitting unit emits light.

[0009] In the power management system according to the first aspect, the photovoltaic element generates power by receiving light from a light-emitting unit installed inside a building, and therefore it is possible to recover a part of the power consumed by the light-emitting unit.

[0010] Incidentally, in order to utilize the power generated by the photovoltaic element in a planned manner, it is preferable to be able to grasp the amount of power generated by the photovoltaic element by light from the light-emitting portion.

[0011] Here, in this embodiment, a prediction unit is provided, and this prediction unit can predict the power generation amount of the photovoltaic element based on the stored usage pattern of the light-emitting unit and the power generation amount information of the photovoltaic element when the light-emitting unit emits light.

[0012] The power management system of the second aspect is the power management system of the first aspect, wherein the light-emitting unit is hidden by a concealing unit and is configured to include at least one of a wall unit, a ceiling unit and a floor unit within the room, and further includes a reflecting unit capable of reflecting light from the light-emitting unit toward the living space, and the photovoltaic element is provided on the surface of the reflecting unit facing the light-emitting unit.

[0013] In the power management system according to the second aspect, the light-emitting unit is hidden by a concealing unit. In addition, in this aspect, a reflecting unit is provided, and this reflecting unit is configured to include at least one of a wall, a ceiling, and a floor in a room. The reflecting unit can reflect light from the light-emitting unit toward the living space. That is, in this aspect, the light-emitting unit and the reflecting unit function as indirect lighting.

[0014] Incidentally, indirect lighting indirectly illuminates a room, and there is room for improvement in terms of effective use of power.

[0015] In this embodiment, the photovoltaic element is provided on the surface of the reflector facing the light-emitting element, and the photovoltaic element generates electricity by the light from the light-emitting element irradiated onto the reflector side. Therefore, in this embodiment, it is possible to recover a part of the electricity used for indirect lighting while providing indoor lighting.

[0016] A power management system according to a third aspect is a power management system according to the first or second aspect, wherein the prediction unit is capable of predicting the amount of power generation by referring to specification information of the light-emitting unit stored in a light-emitting unit information database and specification information of the photovoltaic power generation element stored in a photovoltaic power generation element information database.

[0017] In the power management system according to the third aspect, the prediction unit can predict the amount of power generated by the photovoltaic element by referring to the specification information of the light-emitting unit stored in the light-emitting unit information database and the specification information of the photovoltaic element stored in the photovoltaic element information database in addition to the usage pattern of the light-emitting unit and the power generation amount information of the photovoltaic element when the light-emitting unit emits light. Therefore, in this aspect, the accuracy of prediction of the amount of power generated by the photovoltaic element can be improved.

[0018] A power management system according to a fourth aspect is the power management system according to any one of the first to third aspects, further comprising a power storage device capable of storing power generated by the photovoltaic element.

[0019] The power management system according to the fourth aspect includes a power storage device and can store the power generated by the photovoltaic element. That is, in this aspect, a part of the power consumed by the light-emitting unit can be recovered and stored. Effect of the Invention

[0020] As described above, the power management system according to the present invention has the excellent effect of making it possible to grasp the amount of power generated by photovoltaic elements installed indoors. [Brief description of the drawings]

[0021] [Figure 1] 1 is a schematic diagram showing a configuration of a power management system according to an embodiment of the present invention; [Diagram 2] 2 is a block diagram showing a hardware configuration of a power control device in the power management system according to the embodiment. FIG. [Diagram 3] 2 is a block diagram showing a functional configuration of a power control device in the power management system according to the present embodiment. FIG. [Figure 4] 1 is a schematic diagram showing a configuration around a light-emitting unit in a power management system according to an embodiment of the present invention; [Diagram 5] 10 is a schematic diagram showing a configuration of a light-emitting unit and its surroundings in a power management system according to a first modified example of the present embodiment. FIG. [Figure 6] 13 is a schematic diagram showing a configuration of a light-emitting unit and its surroundings in a power management system according to a second modified example of the present embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] An example of an embodiment of a power management system according to the present invention will be described below with reference to Figures 1 to 6. As shown in Figure 1, a "power management system 10" according to this embodiment includes a power management unit 14 including various devices arranged in a "building 12", a photovoltaic power generation device 16 arranged in the building 12, a "light-emitting unit 22", and a "power storage device 18" installed within the premises of the building 12.

[0023] As shown in Figure 4, the photovoltaic device 16 includes a sheet-like "photovoltaic element 19" such as a perovskite solar cell, and this photovoltaic element 19 is attached along the outer periphery of the underside 20A of the "ceiling portion 20" serving as a reflective portion inside the building 12.

[0024] A light emitting unit 22 is disposed below the photovoltaic element 19 in the building height direction. The light emitting unit 22 includes an LED (Light Emitting Diode) and is disposed in a state capable of emitting light to the upper side in the building height direction. The photovoltaic element 19 is capable of generating power by receiving light from the light emitting unit 22. The power generated by the photovoltaic device 16 is supplied to the power storage device 18 via the power management unit 14, as described below.

[0025] The light-emitting unit 22 is supported on an inner wall 26 of the building 12 via a "support member 24" serving as a concealed portion. This support member 24 includes a first side wall portion 24A, a second side wall portion 24B, and a bottom wall portion 24C, and has a U-shaped vertical cross section that is open upward in the building height direction.

[0026] In detail, the first side wall portion 24A is attached to the inner wall 26 with an attachment member (not shown), the lower wall portion 24C extends from the lower peripheral edge of the first side wall portion 24A in the building height direction to the side opposite the inner wall 26, and the second side wall portion 24B extends from the peripheral edge of the lower wall portion 24C on the side opposite the inner wall 26 to the upper side in the building height direction. The light emitting portion 22 is disposed on the upper side of the lower wall portion 24C in the building height direction, and is hidden by the support member 24 when viewed from below in the building height direction.

[0027] In addition, the ceiling surface 29 of the building 12 is composed of the portion of the underside 20A of the ceiling portion 20 that is not hidden by the support member 24 when viewed from below in the building height direction, and the underside 24C1 of the lower wall portion 24C, and the ceiling portion 20 is a so-called coffered ceiling.

[0028] Returning to FIG. 1, the power management unit 14 includes a power control device 28, a measurement unit 30, a power conversion unit 32, and a distribution board .

[0029] 2, the power control device 28 includes a central processing unit (CPU) 28A, a read only memory (ROM) 28B, a random access memory (RAM) 28C, a storage 28D, a communication interface (I / F) 28E, and an input / output I / F 28F. The CPU 28A, the ROM 28B, the RAM 28C, the storage 28D, the communication interface (I / F) 28E, and the input / output I / F 28F are connected to each other so as to be able to communicate with each other via a bus 28G.

[0030] The CPU 28A is a central processing unit that controls various devices by executing various programs and controls the power generated by the photovoltaic device 16. Specifically, the CPU 28A is capable of reading out programs from the ROM 28A and executing the programs using the RAM 28C as a working area. The execution programs stored in the ROM 28A are then read out and executed by the CPU 28A, enabling the power control device 28 to perform various functions, as described below.

[0031] The storage 28D includes a hard disk drive (HDD) or a solid state drive (SSD) and stores various programs including an operating system and various data. The storage 28D also stores the measurement results of the measurement unit 30 and various information acquired via the communication I / F 28E.

[0032] The communication I / F 28E is an interface used to connect the power control device 28 to a network, and is capable of communicating with a data server (not shown) or the like. This interface uses communication standards such as Ethernet (registered trademark), FDDI, and Wi-Fi (registered trademark). The communication I / F 28E may also include a wireless device.

[0033] The input / output I / F 28F is an interface for the power control device 28 to communicate with the distribution board 22, the measurement unit 30, and the power conversion unit 32.

[0034] The measurement unit 30 measures the power generated by the photovoltaic power generation device 16 and the power consumed by the light-emitting unit 22 via the distribution board 34 at predetermined time intervals (for example, every 10 minutes), and is capable of transmitting these measurement results, i.e., information on the amount of power generated by the photovoltaic power generation device 16 and the usage pattern of the light-emitting unit 22, to the power control device 28 as a measurement signal.

[0035] The power conversion unit 32 includes a DC / DC converter (not shown) capable of converting the DC power supplied from the photovoltaic power generation device 16 into DC power that can be supplied to the power storage device 18, and an inverter (not shown) capable of converting the DC power supplied from the power storage device 18 into AC power that can be supplied to the load side within the building 12, such as the light-emitting unit 22.

[0036] The distribution board 34 is electrically connected directly or via equipment to loads within the building 12, such as the photovoltaic power generation device 16, the power storage device 18, and the light-emitting unit 22, and mediates the transfer of power between them.

[0037] 1, the power storage device 18 is configured to include a plurality of battery modules (not shown), and is capable of storing power supplied from the photovoltaic power generation device 16 via the power conversion unit 32. Moreover, the power stored in the power storage device 18 is adapted to be supplied to each load via the power conversion unit 32 and the distribution board 34 in a predetermined state.

[0038] Next, the functional configuration of the power control device 28 will be described with reference to Fig. 3. The power control device 28 functions as a collection of a power generation status information acquisition unit 36, a "light-emitting unit specification database 38" as a light-emitting unit information database, a "power generation device information database 40" as a photovoltaic element information database, and a "power generation prediction unit 42" as a prediction unit, by the CPU 28A reading out an execution program stored in the ROM 28B and executing the program.

[0039] The power generation status information acquisition unit 36 ​​is capable of acquiring power generation status information indicating the power generation state of the photovoltaic power generation device 16 and power consumption status information indicating the power consumption of the light-emitting unit 22 based on the measurement signal transmitted from the measurement unit 30, and transmitting the information to the power generation power prediction unit 42.

[0040] The light-emitting unit specification database 38 is configured to obtain specification information of the light-emitting unit 22, i.e., information such as the installation area, luminance distribution, and spectral irradiance spectrum of the light-emitting unit 22, from the data server and transmit it to the power generation prediction unit 42.

[0041] The power generation device information database 40 acquires from the data server specification information of the photovoltaic device 16, i.e., the installation area of ​​the photovoltaic element 19, the spectral sensitivity characteristics, the illuminance dependency, the environmental temperature dependency, the light incidence angle dependency, the conversion efficiency in the reference light source, and the relative positional relationship (distance, the light incidence angle to the light receiving plane, etc.) between the light receiving center position of the photovoltaic element 19 (the position where the amount of power generation is maximum) and the light emitting center position of the light emitting section 22 (the position where the spectral density is maximum), and transmits this information to the power generation prediction section 42.

[0042] The power generation prediction unit 42 is capable of predicting the power generated by the photovoltaic power generation device 16 by inputting information acquired from the power generation status information acquisition unit 36, the light-emitting unit specification database 38, and the power generation device information database 40 into a power generation prediction model.

[0043] In detail, the power generation prediction model is a machine-learned model that is trained according to a known machine learning method such as a recurrent neural network using a set of data including specification information of the light-emitting unit 22, specification information of the photovoltaic power generation device 16, dates for multiple days (e.g., all days of a year), power generation status information of the photovoltaic power generation device 16, and power consumption status information of the light-emitting unit 22 as teacher data.

[0044] The power generation prediction model is capable of outputting predicted data for the amount of power generated by the photovoltaic power generation device 16 for each specified hour on a date by inputting specification information for the light-emitting unit 22, specification information for the photovoltaic power generation device 16, and a date.

[0045] <Actions and Effects of the Present Embodiment> Next, the operation and effects of this embodiment will be described.

[0046] 4, in this embodiment, a photovoltaic element 19 generates power by receiving light from a light-emitting unit 22 installed inside a building 12. Therefore, a part of the power consumed by the light-emitting unit 22 can be recovered.

[0047] Incidentally, in order to utilize the power generated by the photovoltaic element 19 in a planned manner, it is preferable to be able to grasp the amount of power generated by the photovoltaic element 19 from the light from the light-emitting section 22.

[0048] Here, in this embodiment, as shown in FIG. 3, a power generation prediction unit 42 is provided, and this power generation prediction unit 42 can predict the power generation amount of the photovoltaic element 19 based on the stored usage pattern of the light-emitting unit 22 and the power generation amount information of the photovoltaic element 19 when the light-emitting unit 22 emits light.

[0049] In this embodiment, the light-emitting unit 22 is hidden by the support member 24. In this embodiment, the ceiling unit 20 is provided, and the ceiling unit 20 can reflect the light from the light-emitting unit 22 toward the living space. That is, in this embodiment, the light-emitting unit 22 and the ceiling unit 20 function as indirect lighting.

[0050] Incidentally, indirect lighting indirectly illuminates a room, and there is room for improvement in terms of effective use of power.

[0051] In this embodiment, the photovoltaic element 19 is provided on the surface of the ceiling portion 20 facing the light-emitting portion 22, and the photovoltaic element 19 generates power by the light from the light-emitting portion 22 irradiated onto the ceiling portion 20. Therefore, in this embodiment, it is possible to recover a part of the power used for indirect lighting while providing indoor lighting.

[0052] 3, in this embodiment, the power generation prediction unit 42 can predict the amount of power generated by the photovoltaic element 19 by referring to the specification information of the light-emitting unit 22 stored in the light-emitting unit specification database 38 and the specification information of the photovoltaic element 19 stored in the power generation device information database 40, in addition to the usage pattern of the light-emitting unit 22 and the power generation amount information of the photovoltaic element 19 when the light-emitting unit 22 emits light. Therefore, in this embodiment, the accuracy of prediction of the amount of power generated by the photovoltaic element 19 can be improved.

[0053] 1, the present embodiment includes a power storage device 18, which can store the power generated by the photovoltaic element 9. That is, in the present embodiment, a part of the power consumed by the light-emitting unit 22 can be recovered and stored.

[0054] As described above, in the power management system 10 according to this embodiment, it is possible to grasp the amount of power generated by the photovoltaic element 19 installed indoors.

[0055] <First Modification of the Present Embodiment> Hereinafter, a power management system 10 according to a first modified example of the embodiment of the present invention will be described with reference to FIG.

[0056] In this modified example, the ceiling portion 50 is a so-called dropped ceiling in which the lower surface 50A is located lower in the building height direction than the lower surface 20A of the ceiling portion 20. And, the light-emitting portion 22 is arranged on the upper side in the building height direction of the "lower ceiling material 52" serving as a hidden portion constituting the lower surface 50A in a state capable of irradiating light toward the inner wall 26 side.

[0057] Additionally, an upper ceiling material 54 is disposed above the lower ceiling material 52 in the building height direction between the ceiling portion 50 and the inner wall 26. The light from the light emitting unit 22 is also irradiated onto the upper ceiling material 54, and in this modified example, the inner wall 26 and the "upper ceiling material 54" function as a reflecting portion.

[0058] On the other hand, in this modification, the photovoltaic element 19 is attached to the inner wall 26 and the upper ceiling material 54 .

[0059] According to such a configuration, except for the action and effect due to the light-emitting portion 22 being hidden by the lower ceiling material 52, the same action and effect as the above-described embodiment is achieved.

[0060] <Second Modification of the Present Embodiment> Hereinafter, a power management system 10 according to a first modified example of the embodiment of the present invention will be described with reference to FIG.

[0061] In this modified example, the light-emitting unit 22 is disposed on the upper part of the upper frame 62 at the entrance 60 of the building 12 in the building height direction, and is concealed from the outdoors by a "decorative panel 64" which serves as a concealing section.

[0062] Meanwhile, in this modified example, the photovoltaic element 19 is attached to a floor surface 66A of the "dirt floor portion 66" serving as a reflecting portion below the light emitting portion 22 in the building height direction.

[0063] According to such a configuration, the same effects and advantages as those of the above-mentioned embodiment can be obtained. In addition, in this modification, the light-emitting portion 22 and the earthen floor portion 66 function as indirect lighting, and can provide illumination for the entrance 60.

[0064] <Supplementary explanation of the above embodiment> (1) In the above-described embodiment, the type of building 12 is not specified. However, the building 12 may be a residence or an accommodation facility such as a hotel.

[0065] (2) Furthermore, in the above-described embodiment, the power generated by the photovoltaic power generation device 16 was predicted using a power generation prediction model. However, a configuration may be adopted in which the power generated by the photovoltaic power generation device 16 is predicted based only on power generation status information indicating the power generation state of the photovoltaic power generation device 16. [Explanation of symbols]

[0066] 10 Power Management System 12. Building 18. Energy storage device 19 Photovoltaic element 20 Ceiling section (reflection section) 22 Light emitting part 24 Support member (hidden part) 38 Light-emitting part specification database (light-emitting part information database) 40 Power generation device information database (photovoltaic element information database) 42 Power generation prediction unit (prediction unit) 52 Lower ceiling material (hidden part) 54 Upper ceiling material (reflective part) 64 Decorative panel (hidden part) 66 Earthen floor (reflective area)

Claims

1. a photovoltaic element capable of generating electricity by receiving light from a light-emitting unit installed inside a building; a prediction unit that predicts the amount of power generated by the photovoltaic element based on the stored usage pattern of the light-emitting unit and information on the amount of power generated by the photovoltaic element when the light-emitting unit emits light; A power management system equipped with

2. the light emitting portion is hidden by a hiding portion, The vehicle further includes a reflector that includes at least one of a wall, a ceiling, and a floor of the vehicle, and is capable of reflecting light from the light-emitting unit toward a living space. The photovoltaic element is provided on a surface of the reflector facing the light emitting unit. The power management system of claim 1 .

3. The prediction unit is capable of predicting the power generation amount by referring to specification information of the light-emitting unit stored in a light-emitting unit information database and specification information of the photovoltaic power generation element stored in a photovoltaic power generation element information database. The power management system of claim 1 .

4. The power generation device further includes a power storage device capable of storing the power generated by the photovoltaic element. The power management system according to any one of claims 1 to 3.

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