Solar power generation device

Abstract

To provide a solar power generation device in which failure diagnosis for each solar cell array can be easily performed and each solar cell array can be replaced.SOLUTION: A solar power generation device includes: open / closed state detection means (2, 3) for detecting an open / closed state of a blind 1; solar cell arrays 4 in each of which solar cell modules T for receiving sunlight to generate power are connected in series and which are installed on the blind 1 so as to be perpendicular to an opening / closing direction of the blind 1; solar cell panels 5 in each of which a plurality of the solar cell arrays 4 is installed parallel to the opening / closing direction of the blind 1 and which are connected in parallel; and a power conversion device 6 capable of outputting power generated by the solar cell panels 5. The solar power generation device further includes a failure detection device 7 for performing failure diagnosis for each solar cell array 4 by measuring generated power in accordance with the open / closed state of the blind 1 detected by the open / closed state detection means.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a solar power generation device for receiving solar power generation. [Background technology]

[0002] Solar cells convert light energy into electrical energy (electricity) using the photovoltaic effect, and since electricity can be directly obtained from sunlight, it has become popular recently as an environmentally friendly method of power generation. It's starting to do. The solar power generation device using such a solar cell includes a solar cell module that combines cells, which are the smallest unit of solar cells, and multiple arrays of modules connected in series or parallel are arranged to form a solar cell panel. It is composed.

[0003] To diagnose such failures in solar power generation devices, conventionally, the amount of output current for each solar panel has been acquired, and the time change in the output current amount is greater than a preset threshold value, and the failure of the solar panel has been used. A diagnostic technique has been proposed (see Patent Document 1). This allows the failure of the solar panels to be easily identified from the multiple solar panels, and allows for quick replacement with a new solar panel. [Prior Art Documents] [Patent Document]

[0004] [Patent Document 1] Japanese Unexamined Patent Publication No. 2014-154728 Summary of the invention [Problems to be solved by the invention]

[0005] However, in the above-mentioned prior art, in order to diagnose failures for each solar cell panel, it is necessary to install a failure detection unit for each solar cell panel, resulting in an issue that the installation costs increase. Recently, film-like solar cells such as perovskite solar cells have been proposed, and in this simple solar power generation device, failures can be diagnosed for each solar cell array. There is a growing demand for replacement of solar cell arrays in short cycles.

[0006] The present invention was made in view of these circumstances, and provides a solar power generation device that can easily diagnose faults for each solar cell array and can be replaced with each solar cell array. In particular. Means for solving the problem

[0007] The invention according to claim 1 includes a sunshade means that can be optionally switched between an open and closed state, an open / close state detection means that detects the open / close state of the sunshade means, and a power generation system receiving sunlight. The solar cell modules used are connected in series, and are installed in the sunshade means so as to be perpendicular to the opening / closing direction of the sunshade means, and the opening / closing direction of the sunshade means. 1. A solar power generation device comprising a solar cell panel in parallel, and connected in parallel, and a power converter capable of outputting the power generated by the solar cell panel, the solar cell panel, 1. The device is equipped with a failure detection device for each solar cell array by measuring the generated power according to the opening / closing state of the sunshade means detected by the opening / closing state detection means, and performing a failure diagnosis. do.

[0008] The invention according to claim 2 is the solar power generation device according to claim 1, wherein the failure detection device includes opening / closing the sunshade means when the sunshade means is opened / closed, and opening / closing the sunshade means detected by the opening / closing state detection means. The power generated is measured according to the state, and when the solar cell array generates power that is greater than or equal to a predetermined value, a normal determination is made, in which the solar cell array is determined to be normal.

[0009] According to the invention according to claim 3, the photovoltaic power generation device according to claim 2, the failure detection device measures the opening / closing time when the sunshade means is changed from fully open to fully closed state, and the normal determination is made. The function is performed when the opening / closing time is within a predetermined time.

[0010] According to the invention according to claim 4, in the photovoltaic power generation device according to claim 2, the failure detection device includes a solar cell array determined to be normal by the normal determination and a solar cell array not determined to be normal. In one case, the solar cell array, which has not been determined to be normal, is determined to be a failure.

[0011] The invention according to claim 5 is the solar power generation device according to claim 4, wherein the failure detection device confirms a failure when the solar cell array is determined to be the failure for a predetermined number of consecutive times. Let's say.

[0012] The invention according to claim 6 is a photovoltaic power generation device according to claim 5, and includes a failure display device that displays a solar cell array that has been confirmed as a failure when a failure of a particular solar cell array is confirmed. It is characterized by doing so.

[0013] According to the seventh aspect of the invention, the solar power generation device according to the first aspect of the invention, wherein the solar cell array is detachable from the sunshade means and can be replaced.

[0014] According to the invention according to the eighth aspect, the solar power generation device according to the first aspect, wherein the sunshade means is a blind, a curtain or an awning.

[0015] The invention according to claim 9 is the solar power generation device according to claim 8, wherein the sunshade means comprises the blind, and the opening / closing state detecting means for detecting the opening / closing state of the blind is a stroke sensor and a slat. The angle sensor is characterized in that when the slat angle sensor detects a value or higher than a predetermined value, the fault detection device performs the fault diagnosis.

[0016] According to the invention of claim 10, the solar power generation device according to claim 1, the power converter performs maximum power point tracking control when outputting the generated power from the solar cell panel. [Effects of the invention]

[0017] According to the invention described in claim 1, there is provided a failure detection device that performs a failure diagnosis for each solar cell array by measuring the generated power according to the opening / closing state of the sunshade means detected by the opening / closing state detection means. Therefore, failure diagnosis for each solar cell array can be easily performed, and it can be replaced with each solar cell array.

[0018] According to the invention of claim 2, the failure detection device measures the generated power according to the opening / closing state of the sunshade means when opening / closing the sunshade means, and the opening / closing state detection means, and the solar cell When the array generates power of more than a predetermined value, the solar cell array is determined to be normal, and therefore, when the failure diagnosis is made, the solar cell array can be accurately determined to be normal.

[0019] According to the invention of claim 3, the failure detection device measures the opening / closing time when the sunshade means is changed from fully open to fully closed, and the normal determination is made within a predetermined time. Because this is done sometimes, the influence of time changes in sunlight can be suppressed, and normal judgments can be made more accurately when a failure is diagnosed.

[0020] According to the invention according to claim 4, the failure detection device includes a solar cell array that is determined to be normal when it is determined to be normal when it is determined to be normal when it is determined to be normal when it is determined to be normal when it is determined to be normal when it is determined to be normal. Since it is determined that it is a malfunction, it is possible to prevent the erroneous determination of a malfunction when all solar cell arrays are not generated due to the influence of the surrounding shadows at night or when the solar arrays are not generated.

[0021] According to the invention of claim 5, the failure detection device is characterized in that when the solar cell array is determined to be a failure for a certain number of consecutive times, the failure is confirmed, and therefore, when the failure is diagnosed, the failure is more reliably carried out. It can be determined.

[0022] The invention according to claim 6 includes a failure display device that displays the solar cell array that has been confirmed as a failure when a failure of a particular solar cell array is confirmed, so that the failed solar cell array can be visually displayed. It is possible to inform the user to easily grasp the error, and the failed solar cell array can be replaced smoothly.

[0023] According to the invention of claim 7, since the solar cell array can be replaced by detachable from the sunshade means, it is possible to replace only the solar cell array while eliminating the need for replacing the sunshade means. , the cost when replacing the solar cell array can be reduced.

[0024] According to the invention of claim 8, since the sunshade means is a blind, curtain or awning, a general-purpose sunshade means can be used, and the installation cost of the solar power generation device can be reduced. .

[0025] According to the invention according to claim 9, the sunshade means comprises a blind, and the opening / closing state detection means for detecting the opening / closing state of the blind is a stroke sensor and a slat angle sensor, and the slat angle sensor detects a predetermined value or higher. When this occurs, a failure diagnosis is performed using a failure detection device, so blinds, which are general-purpose sunshade methods, can be used, and the opening and closing conditions of the blind can be reliably determined, improving the accuracy of the failure diagnosis. You can do it.

[0026] According to the invention of the tenth aspect, the power converter performs maximum power point tracking control (MPPT) when outputting the generated power from the solar cell panel, and thus the power generation power can be output stably. [Brief description of the drawing]

[0027] [Figure 1] Block diagram showing a solar power generation device according to an embodiment of the present invention. [Figure 2] Schematic diagram showing the solar power generation device [Figure 3] Schematic diagram for explaining the solar cell array in the solar power generation device [Figure 4] Schematic diagram for explaining the solar cell module in the solar power generation device [Figure 5] A perspective view showing the sunshade means and solar cell array in the solar power generation device. [Figure 6] A perspective view showing the sunshade means and solar cell array in the solar power generation device. [Figure 7] Flowchart showing the control contents (main flow) of the solar power generation device [Figure 8a] Flowchart showing control content (fault diagnosis) of the solar power generation device [Figure 8b] A flow chart showing the control content (fault diagnosis) of the solar power generation device [Figure 9] A flow chart showing the control contents of the solar power generation device (slats OK determination in failure diagnosis) [Figure 10] Table showing examples of OK judgment in the failure diagnosis of the same solar power generation device [Figure 11] A flow chart showing the control contents of the solar power generation device (slat NG determination in failure diagnosis) [Figure 12] Table showing examples of NG detection in the failure diagnosis of the solar power generation device [Figure 13] Table showing examples of NG confirmation in the failure diagnosis of the solar power generation device [Figure 14] Graph showing examples of OK judgment flags, changes in power generation and power generation in the failure diagnosis of the solar power generation device [Figure 15] Graph showing calculation of slat positions in the failure diagnosis of the solar power generation device (S12 in Figure 8) [Figure 16] Graph showing calculation of slat angle (slat angle) in the failure diagnosis of the solar power generation device (S13 in Figure 8) [Figure 17] Block diagram showing a solar power generation device according to another embodiment of the present invention (the sunshade means is a curtain or an awning) [Figure 18] Schematic diagram showing the solar power generation device [Figure 19] A perspective view showing a solar power generation device according to another embodiment of the present invention (the open / close of the sunshade means by a motor) [Form for implementing the invention]

[0028] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The solar power generation device according to this embodiment is for receiving solar power and generating electricity, and as shown in Figures 1 and 2, the blind 1 as a sunshade means, and the operating means (lifting code S1, Ladder code S2), stroke sensor 2 and slat angle sensor 3 serving as opening / closing state detection means, solar cell panel 5 having multiple solar cell arrays 4, power converter 6, fault detection device 7, fault indication It is equipped with a device 8.

[0029] The blind 1 can be arbitrarily switched between the open and closed states, and is configured to include a plurality of slats 1a and a main body 1b. As shown in FIG. 2, a plurality of slats 1a are installed in the vertical direction by connecting means such as strings, and can be moved up and down by operating means (lifting cord S1 and ladder cord S2) to change the stroke. At the same time, each of them can rotate to change the angle (slat angle).

[0030] That is, in the fully open state, all of the slats 1a are stacked on the plate 1c located at the lowest stage, and by operating the operating means (lifting cord S1), the plate 1c located at the lowest stage is arranged so that the slats 1a are formed. When one slat is moved downward by one slat from the top is closed, as shown in FIG. 5. Next, by operating the operating means (lifting cord S1), the plate 1c located at the lowest stage moves further downward by one of the slats 1a, and as shown in FIG. 6, two slats 1a are 1a from the top. 2. When, for example, the plate 1c located at the lowest stage moves to the bottom, all of the slats 1a (five in this embodiment) are fully closed as shown in FIG. 2.

[0031] Furthermore, the slats 1a are provided by the operating means (ladder code S2) to shield sunlight from the solar cell array 4, as shown in the schematic diagram below the graph in FIG. 16, and the solar cell array 4. The angle (slat angle) can be adjusted between the angle and the light-transmitting position that emits sunlight. Thus, according to the blind 1 of this embodiment, the plurality of slats 1a move and rotate, and the solar cell array 4 can be opened and closed in the vertical direction, allowing sunlight to be arbitrarily exposed and blocked. It is now. In this embodiment, the slats 1a are configured to move up and down to open and close (i.e., the opening and closing direction is vertically), but they are moved in another direction, such as the left and right direction, and are opened and closed. It may be.

[0032] Furthermore, the blind 1 according to the present embodiment has a main body portion 1b attached to the upper position, and within this main body portion 1b, it is used as an open / close state detection means for detecting the open / close state of the blind 1 (shade means). 1. A stroke sensor 2 and a slat angle sensor 3 are provided. The stroke sensor 2 is made up of a sensor capable of detecting the movement dimensions of the slats 1a, and is detected, for example, by the amount of winding of the lifting cord S1 that lifts and lowers the slats 1a. The slat angle sensor 3 is a sensor that can detect the angle of the slats 1a, and detects the angle of the slats 1a by the amount of winding of the ladder cord S2 that changes the angle of the slats 1a, and the solar cell of each slats 1a It is possible to determine whether the light is transmitted and the light is blocked from the array 4.

[0033] As shown in FIG. 3, the solar cell array 4 includes a plurality of solar cell modules T that receive solar power and generate electricity, and as shown in FIG. 2, the blind 1 (shade means) is connected in series. 固合物合物的合物的合物的合物的合物的合物的合物的合物的合物的合物的合物的合物的合物的 That is, as shown in FIG. 4, the solar cell module T is composed of a plurality of solar cell cells C, which are the smallest unit of a solar cell, enclosed in a weather-resistant package, and as shown in FIG. 3, the solar cell module T is composed of a plurality of solar cell cells C, which is the smallest unit of a solar cell. The solar cell modules T are connected in series to form the solar cell array 4. In addition, a diode g is connected to each solar cell array 4 to prevent backflow. It may also be made up of a solar cell array 4 of a solar cell with excellent flexibility, such as a perovskite solar cell.

[0034] As shown in Figures 1 and 2, the solar cell panel 5 is provided in parallel with the opening / closing direction of the blind 1 (shade means) and connected in parallel with each other. When 1 is fully closed, all of the solar cell arrays 4 that make up the solar cell panel 5 are allowed to receive solar light and generate electricity. The power converter 6 is connected to each solar cell array 4 and is capable of outputting the generated power of the solar cell panel 5 to an external load.

[0035] Here, the power converter 6 according to this embodiment is assumed to perform maximum power point tracking control when outputting the generated power (PV) from the solar cell panel 5. Maximum Power Point Tracking (MPPT) is a control that automatically determines the optimum current x voltage value (maximum power point or optimal operating point) that allows the solar cell to maximize the output when generating electricity. It is possible to operate while following the optimum operating point that is constantly changing due to changes in weather conditions, etc.

[0036] For example, in the maximum power point tracking control, for example, the climbing method, the voltage is changed in one direction (increased or decreased) on the P-V curve that graphs the voltage and power, and the power is converted from an increase to a decrease. This control is then controlled so that the voltage is changed in the opposite direction. By repeating this, the control can be made to the optimum operating point where the power is always at the highest possible level. Thus, when the power conversion device 6 according to this embodiment outputs the generated power from the solar cell panel 5, it performs maximum power point tracking control, and therefore can output the generated power stably.

[0037] The failure detection device 7 measures the generated power (PV) according to the opening / closing state of the blind 1 (shade means) detected by the stroke sensor 2 and the slat angle sensor (open / closing state detection means), and thereby, the solar cell is used. A failure diagnosis is performed for each array 4. Specifically, the failure detection device 7 measures the generated power (PV) according to the opening and closing state of the blind 1 detected by the stroke sensor 2 and the slat angle sensor 3 when the blind 1 is opened and closed during the failure diagnosis. In addition, when the solar cell array 4 generates power greater than or equal to a predetermined value, the solar cell array 4 is configured to perform a normal judgment (if it is not determined that it is normal, it can be determined as a malfunction). It's.

[0038] Specifically, when the stroke sensor 2 and the slat angle sensor 3 detect the opening / closing state of the blind 1, that is, the movement state of each slat 1a, and when one slat 1a moves and becomes a closed state (Figure 5 (See), when two slats 1a move and become closed (Figure 6), and when three to five slats 1a move one after another move and become closed, the power generated (PV) is respectively generated. By measuring the solar cell array 4 disposed in each slat 1a, it is possible to perform a normal determination (determining whether it is normal or malfunction).

[0039] For example, if only the slat position 2 is malfunctioning in slat positions 1 to 5, the results shown in FIG. 14 are obtained for OK determination, change in power generated and power generated. That is, the generated power is lowered after slat position 2 compared to when all slat positions 1 to 5 are normal, and only slat position 2 is below the specified value (OK determination value), and slat position 2 is also below the slat position 2. Only the flag that judges OK is set to 0.

[0040] Therefore, according to the solar power generation device according to the present embodiment, the generated power is measured according to the opening / closing state of the blind 1 detected by the stroke sensor 2 and the slat angle sensor 3, and the failure occurs in each solar cell array 4. Since the fault detection device 7 is provided for performing a diagnosis, fault diagnosis for each solar cell array 4 can be easily performed, and it can be replaced with each solar cell array 4.

[0041] In particular, the failure detection device 7 according to the present embodiment measures the generated power (PV) according to the opening / closing state of the blind 1 detected by the stroke sensor 2 and the slat angle sensor 3 when the blind 1 is opened / closed, and the sun is also used. When the battery array 4 generates power that is greater than or equal to a predetermined value, the solar cell array 4 is determined to be normal, and therefore, when the failure is diagnosed, the solar cell array 4 can be accurately determined to be normal.

[0042] Furthermore, the failure detection device 7 according to this embodiment measures the opening / closing time when the blind 1 has changed from the fully open state to the fully closed state, and the normal determination is made when the opening / closing time is made within a specified period of time. It is composed. This can suppress the influence of time changes in sunlight (for example, changes in the intensity of sunlight due to time periods), and it is possible to make it possible to more accurately determine normality when the fault is diagnosed.

[0043] Furthermore, in the failure detection device 7 according to this embodiment, when there are solar cell array 4 that is determined to be normal and solar cell array 4 that is not determined to be normal, the solar cell array 4 that is not determined to be normal, The array 4 is configured to determine that it is a failure. This prevents erroneous determination of a failure when all solar cell arrays 4 are not generated due to night or due to the influence of surrounding shadows.

[0044] Furthermore, the failure detection device 7 according to this embodiment is adapted to confirm the failure when the solar cell array 4 is determined to be a failure for a predetermined number of consecutive times. This makes it possible to further reliably determine a failure during the failure diagnosis. The number of times that a failure is confirmed by the failure detection device 7 can be set arbitrarily, and the failure may be confirmed when it is not determined to be normal only once.

[0045] Furthermore, in this embodiment, when a failure of a particular solar cell array 4 is confirmed, it is equipped with a failure display device 8 that displays the solar cell array 4 that has been confirmed as a failure. This allows the user to visually notify the failed solar cell array 4 to easily grasp it, and the failed solar cell array 4 can be replaced smoothly. The failure display device 8 may be a display device connected to the failure detection device 7 via wired or wireless, or may be a terminal (smartphone, etc.) carried by the user.

[0046] Additionally, in this embodiment, the solar cell array 4 can be attached and detached from the blind 1 (shade means) and replaced. This allows only the solar cell array 4 to be replaced without the need to replace the blinds 1, and the cost of replacing the solar cell array 4 can be reduced. Furthermore, in this embodiment, the sunshade means comprises a blind 1, and the opening / closing state detection means for detecting the opening / closing state of the blind 1 are the stroke sensor 2 and the slat angle sensor 3, and the slat angle sensor 3 is a prescribed setting. When a value or higher is detected, the failure detection device 7 performs a failure diagnosis, so that the blind 1, which is a general-purpose sunshade, can be used, and it is possible to reliably determine the opening / closing state of the blind 1. , the accuracy of the failure diagnosis can be improved.

[0047] Next, a control method (main flow) for the solar power generation device (blinds with five slats) according to this embodiment will be described based on the flow chart of FIG. 7. First, in S1, the PV voltage at which the amount of power generation is maximized is determined by the maximum power point tracking control (MPPT), and in S2, a failure diagnosis is performed by the failure detection device 7 in the failure diagnosis control. After that, PV voltage control is carried out at S3, and the power converter 6 is controlled to achieve the PV voltage determined at S1, and the load voltage is controlled at S4, and the power converter 6 is controlled according to the load. Controls the output voltage.

[0048] Next, the failure diagnosis control S2 in the main flow will be described below based on the flow charts in FIG. 8(a)(b). When the fault diagnosis control S2 is carried out, the generated power (PV) is calculated at S11, and the slat position (SP) at S12 and the slat angle (slat angle) (SA) at S13 are calculated respectively. As shown in FIG. 15, the slat position (SP) is calculated by associating the blind stroke (BS) detected by the stroke sensor 2 with each slat 1a, and the slat angle (SA) is shown in FIG. 16. In this way, the slat angle (SA) detected by the slat angle sensor 3 is calculated by associating it.

[0049] Then, in S14 it is determined whether the slat position (SP) is greater than 0 (whether at least one slat 1a is in the closed state or not) and if it is greater than 0, in S15 it is slat position (SP) is determined whether or not the value is less than 6 (full closed or not), and if it is less than 6, the process proceeds to S16. In S16, it is determined whether the slat angle (SA) is greater than a predetermined value (see FIG. 16), and if the slat angle (SA) is greater than a predetermined value, the timer (TM) set in S17 is 0. It is determined whether or not.

[0050] If the timer (TM) is 0 in S17, the process proceeds to S18, and it is determined whether or not the SPO is 0, and if the SPO is 0, the F_OK decision, which is the flag for normal determination, is set to 1. After that, the timer (TM) is set at S20, and control is performed to determine the slat OK (control based on the flow chart of FIG. 9, which will be described later), and control is terminated at S22 as SPO=SP.

[0051] On the other hand, if it is determined in S15 that the slat position (SP) is not smaller than 6 (in the fully closed state), it is determined in S23 whether the F_OK decision, which is the flag for normal determination, is 1. If it is determined that the F_OK determination is 1 in S23, the F_OK determination is set to 0 in S24, and the timer (TM) is set to 0 in S25. After control of slat NG determination is carried out at S26 (control based on the flow chart of FIG. 11 to be described later), the process proceeds to S22, where SPO=SP is set, and control is terminated. If it is determined that the F_OK determination is not 1 in S23, S24 to S26 are skipped and the program proceeds to S22.

[0052] On the other hand, if it is determined that the slat position (SP) is not greater than 0 in S14 (when fully open), if it is determined that the slat angle (SA) is not greater than a specified value in S16, or if it is determined that the slat angle (SA) is not greater than a specified value, or if it is determined that the slat position (SP) is not greater than a specified value in S18 If it is determined that SPO is not 0, the F_OK determination is set to 0 at S28, the timer (TM) is set to 0 at S29, and the SPOK is set to 0 at S30, and the proceeding to S22. Furthermore, if it is determined at S17 that the timer (TM) is not 0, the process proceeds to S27, subtract the timer (TM), and then proceeds to S21.

[0053] Next, the slat OK determination S21 will be described below based on the flow chart of FIG. When the slat OK determination S21 is performed in the fault diagnosis flow (see Figure 8b), it is determined at S40 whether the slat position (SP) is smaller than the SPO, and if it is determined that the slat position (SP) is smaller than the SPO , it is determined at S41 whether the slat position (SP) is equal to the SPO. If it is determined that the slat position (SP) is equal to SPO, the process proceeds to S42, and it is determined whether the generated power (PV) is smaller than PB(SP)min, and the generated power (PV) is PB(SP) If it is determined that it is smaller than min, PB(SP)min=generated power (PV) at S43, then the process proceeds to S44.

[0054] Furthermore, if it is determined in S42 that the generated power (PV) is not smaller than PB(SP)min, S43 is skipped and the program proceeds to S44. On the other hand, if it is determined in S41 that the slat position (SP) is not equal to SPO, the program proceeds to S48, and after PV (SP)max = generated power (PV), S42 is skipped and proceeds to S43. It will become.

[0055] In S44, if the generated power (PV) is greater than PB(SP)max, and if the generated power (PV) is determined to be greater than PB(SP)max, then PB(SP)max is determined to be greater than PB(SP)max in S45. =After setting the generated power (PV), proceed to S46. On the other hand, if it is determined at S44 that the generated power (PV) is not greater than PB (SP)max, S45 is skipped and the program proceeds to S46.

[0056] In S46, it is determined whether the calculated value PB(SP)max-PB(SP)min is greater than the OK determination value, and if the calculated value is determined to be greater than the OK determination value, the slat is changed in S47. Control is terminated by setting F_OK(SP), which is the OK flag, to 1. Furthermore, if it is determined in S46 that the calculated value is not greater than the OK determination value, S47 is skipped and control is terminated. On the other hand, if it is determined at S40 that the slat position (SP) is not smaller than the SPO, S41 to S47 are skipped and control is terminated. For F_OK (SP), for example, if a slat position (SP) of 1 to 5 (the CPU processing is in units of 8 bits, so the number is 8) is set, and thereafter, the slat position ( If only SP)=2 is not determined to be normal, a flag as shown in FIG. 10 will be given.

[0057] Next, the slat NG determination S26 will be described below based on the flow chart of FIG. When the slat NG determination S26 is performed in the fault diagnosis flow (see Figure 8b), it is determined at S50 whether the SPOK, which is the flag for determining the OK of the slat, is greater than 0, and if the SPOK is greater than 0, the SPOK is greater than 0, It is determined whether SPOK <00011111B (bits). When it is determined at S51 that SPOK <00011111B (bit), it is set to X=1 in S52, and it is determined whether F_OK(X)=0 in S53, and F_OK(X)=0 If so, proceed to S54.

[0058] In S54, SPNG(X), which is the number of times when slats are not continuously OK, is increased by 1 to SPNG(X)+1, and S55 is determined whether or not SPNG(X) is greater than a predetermined value. If SPNG(X) is larger than the specified value, the flag is set to F_NG(X)=1 at S56 and the NG determination is confirmed, and then X=X+1 at S57, and X is set to 5 at S58. It is determined whether the value is large or not, and if X is greater than 5, control is terminated. Furthermore, if it is determined in S50 that SPOK is not greater than 0, or if it is determined in S51 that SPOK <00011111B (bit), control is terminated.

[0059] On the other hand, if it is determined in S53 that F_OK(X)=0, SPNG=0 in S59, F_NG(X)=0 in S60, then skip S54 to S56 and proceed to S57. That becomes. Furthermore, if SPNG(X) is not greater than the specified value in S55, Skip S56 and proceed to S57, and if X is determined not to be greater than 5 in S58, control after returning to S53 is returned to S53. It's going to go on.

[0060] For SPNG (SP), for example, if a slat position (SP) of 1 to 5 (the CPU processing is in units of 8 bits, so the number is 8) is set, and thereafter, the slat position ( If no normal determination is made N times consecutively with SP)=2, a flag as shown in FIG. 12 is given. In this case, F_NG(SP) is given a flag that indicates NG confirmation (fault) as shown in FIG. 13.

[0061] Although the present embodiment has been described above, the present invention is not limited to this. As shown in, for example, as shown in Figures 17 and 18, instead of the blind 1 as a sunshade means, the opening / closing means 9 consisting of a curtain or an awning is used. It's good too. The opening / closing means 9 includes a cloth or sheet-like light shielding section 9a and a main body 9b that can be wrapped around the light shielding section 9a and stored therein, and the light shielding section 9a can be opened and closed in the vertical direction.

[0062] In the solar cell array 4 according to this embodiment, a solar cell module T that receives sunlight and generates power is connected in series, and is perpendicular to the opening / closing direction of the opening / closing means 9 (shade means). It is installed in the light shielding section 9a. Furthermore, the solar cell panel 5 according to this embodiment is configured by installing a plurality of solar cell arrays 4 in parallel in the opening / closing direction of the opening / closing means 9 (shade means) and connecting them in parallel. , the device is equipped with a failure detection device 7 that performs a failure diagnosis for each solar cell array 4 by measuring the generated power according to the opening / closing state of the opening / closing means 9 detected by the opening / closing state detection means.

[0063] Furthermore, as shown in FIG. 19, the opening / closing operation of the blind 1 as the opening / closing means may be performed by the motor M instead of the manual operation by the operating means (lifting cord S1 and ladder cord S2). In this case, by using the motor M as a drive source that can rotate with high accuracy, such as a servo motor, the opening / closing state of the blind 1 can be detected according to the rotational speed of the motor M, and therefore the stroke sensor as in the previous embodiment Separate sensors such as 2 and slat angle sensor 3 may be eliminated. [Industrial availability]

[0064] With the same purpose as the present invention, it can be applied to items with different appearances or other functions added. [Symbol explanation]

[0065] 1 Blinds (shade method) 1a Slats 1b Main body 2 Stroke sensor (open / close state detection means) 3 Slat angle sensor (opening / closing status detection means) 4 Solar cell array 5 Solar Panel 6 Power Conversion Device 7 Fault detection device 8 Fault indicator 9 Opening and closing means (shade means consisting of curtains or awnings) 9a Shading section 9b Main body T Solar Cell Module C Solar cell g Diode S1 Lifting cord (operation means) S2 Ladder cord (operation means) M Motor

Claims

1. A sunshade means that can be arbitrarily switched between an open state and a closed state; an open / closed state detection means for detecting an open / closed state of the sunshade means; a solar cell array in which solar cell modules that receive sunlight and generate electricity are connected in series and which is installed on the sunshade means so as to be perpendicular to the opening and closing direction of the sunshade means; a solar cell panel in which a plurality of the solar cell arrays are arranged in parallel with respect to the opening and closing direction of the sunshade means and connected in parallel; a power conversion device capable of outputting power generated by the solar panel; A solar power generation device comprising: a fault detection device that performs fault diagnosis for each of the solar cell arrays by measuring the generated power in accordance with the open / closed state of the sunshade means detected by the open / closed state detection means.

2. 2. The solar power generation device according to claim 1, wherein the failure detection device measures the generated power in accordance with the open / closed state of the sunshade means detected by the open / closed state detection device when the sunshade means is opened or closed, and makes a normality determination to determine that the solar cell array is normal if the solar cell array generates power equal to or greater than a predetermined value.

3. 3. The solar power generation device according to claim 2, wherein the failure detection device measures the opening / closing time during which the sunshade means is changed from a fully open state to a fully closed state, and the normal determination is made when the opening / closing time is within a predetermined time.

4. 3. The photovoltaic power generation device according to claim 2, wherein, when there are solar cell arrays determined to be normal in the normality determination and solar cell arrays not determined to be normal, the failure detection device determines that the solar cell array not determined to be normal is faulty.

5. 5. The photovoltaic power generation system according to claim 4, wherein the failure detection device determines that the solar cell array is faulty when the solar cell array is judged to be faulty a predetermined number of times in succession.

6. 6. The photovoltaic power generation system according to claim 5, further comprising a failure display device which, when a failure in a specific solar cell array is determined, displays the solar cell array determined to be faulty.

7. 2. The photovoltaic power generating device according to claim 1, wherein said solar cell array is detachable from said sunshade means and replaceable.

8. 2. The solar power generating apparatus according to claim 1, wherein the sunshade means is a blind, a curtain or an awning.

9. The solar power generation system according to claim 8, characterized in that the sunshade means comprises the blinds, and the open / closed state detection means for detecting the open / closed state of the blinds comprises a stroke sensor and a slat angle sensor, and when the slat angle sensor detects a value equal to or greater than a predetermined value, the fault detection device performs the fault diagnosis.

10. 2. The photovoltaic power generating apparatus according to claim 1, wherein the power conversion device performs maximum power point tracking control when outputting generated power from the solar cell panel.

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