JP2017103992A - Solar cell module evaluation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module evaluation device capable of reproducing the influence of a shadow and evaluating characteristics of a solar cell module.SOLUTION: The solar cell module evaluating apparatus is an apparatus for evaluating characteristics of a solar cell module in which a plurality of cells are electrically connected and includes: an irradiation unit including a plurality of light sources provided corresponding to each of the plurality of cells; and an irradiation control unit that independently controls the amount of light emitted by the plurality of light sources.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a solar cell module evaluation apparatus.

  2. Description of the Related Art Conventionally, there has been known an evaluation apparatus that measures the current-voltage characteristics of a solar battery module by irradiating a solar battery module to which a plurality of solar battery cells (hereinafter simply referred to as “cells”) are electrically connected with pseudo sunlight. (For example, refer to Patent Document 1).

JP2013-089935A

  By the way, for example, when a solar cell module is installed in a vehicle, the amount of light applied to each cell of the solar cell module varies depending on the traveling situation, such as when the vehicle passes a shaded place such as a building or a utility pole. There is a case. As described above, when the amount of light applied to each cell changes, electromagnetic characteristics are generated due to fluctuations in the characteristics of the solar cell module, and for example, reception of radio broadcasts may be disturbed.

  However, in the conventional evaluation apparatus, it is difficult to evaluate the characteristics of the solar cell module by reproducing the influence of the shadow, for example, when the vehicle passes through a shadowed place. This is because in the conventional apparatus, since the characteristics of the solar cell module are evaluated using one light source, it is difficult to adjust the amount of light applied to each cell in accordance with the shadow distribution.

  Then, in view of the said subject, it aims at providing the solar cell module evaluation apparatus which can reproduce the influence of a shadow and can evaluate the characteristic of a solar cell module.

In order to achieve the above object, a solar cell module evaluation apparatus according to an aspect of the present invention includes:
An apparatus for evaluating characteristics of a solar cell module in which a plurality of cells are electrically connected,
An irradiation unit including a plurality of light sources provided corresponding to each of the plurality of cells;
An irradiation controller that independently controls the amount of light emitted from each of the plurality of light sources;
It is characterized by providing.

  According to the disclosed solar cell module evaluation apparatus, the irradiation light amount of each of the plurality of light sources provided corresponding to each of the plurality of cells is controlled independently, so that the influence of the shadow is reproduced, and the solar cell module Can be evaluated.

Schematic of solar cell module evaluation apparatus of this embodiment Diagram showing an example of shadow distribution and cell output distribution Figure showing another example of shadow distribution and cell output distribution The figure which shows the further another example of the shadow distribution and the output distribution of the cell Diagram showing the relationship between how light strikes a cell and the amount of power generated by the cell The figure which illustrates the condition table in a 1st embodiment The figure which shows the output distribution of each cell when light is irradiated based on a condition table The figure which shows the electromagnetic wave noise which generate | occur | produces from a solar cell module when light is irradiated based on a condition table The figure which illustrates the condition table in a 2nd embodiment

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the invention will be described with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, the duplicate description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  The solar cell module evaluation apparatus of this embodiment is an apparatus that evaluates the characteristics of a solar cell module that varies as the amount of light (irradiation amount) irradiated to the solar cell module (solar panel) changes.

  Hereinafter, as an example, an apparatus for reproducing the influence of a shadow when the vehicle passes through a shadowed place and evaluating the characteristics of the solar cell module installed on the roof of the vehicle will be described, but the present invention is not limited thereto. Not. The solar cell module evaluation apparatus of this embodiment can be used when evaluating the characteristics of various types of solar cell modules such as residential solar cell modules.

(Solar cell module evaluation device)
The solar cell module evaluation apparatus of this embodiment is demonstrated based on FIG. FIG. 1 is a schematic diagram of a solar cell module evaluation apparatus according to the present embodiment.

  As shown in FIG. 1, the solar cell module evaluation device is a device that evaluates the characteristics of the solar cell module 11, and includes an irradiation unit 1 and an irradiation control unit 6. The solar cell module 11 is a module in which a plurality of cells 12 are electrically connected. For example, the solar cell module 11 is a crystal silicon solar cell module in which a plurality of crystal silicon solar cells are electrically connected. In FIG. 1, the solar cell module 11 to which 12 cells 12 are electrically connected is shown as an example.

  The irradiation unit 1 includes a plurality of light sources 2 provided corresponding to each of the plurality of cells 12 of the solar cell module 11. In FIG. 1, twelve light sources 2 are provided corresponding to each of the twelve cells 12. It is preferable that the irradiation part 1 is arrange | positioned in the light-receiving surface (surface) side of the solar cell module 11 in the position where the distance from the surface of the solar cell module 11 was 25 cm or more away. Thereby, since it can suppress that the temperature of the solar cell module 11 rises with the light irradiated from the irradiation part 1, the characteristic of the solar cell module 11 can be evaluated in a substantially constant temperature environment. As a result, the characteristics of the solar cell module 11 can be accurately evaluated.

  Light emitted from each light source 2 is applied to one cell 12 corresponding to each light source 2 and has directivity that is not applied to other cells 12 such as cells adjacent to the corresponding one cell 12. It is preferable. Thereby, it can suppress that the light irradiated with respect to the solar cell module 11 from each light source 2 interferes with each other. The directivity that does not irradiate light to other cells 12 is not limited to directivity that does not irradiate light to other cells 12 at all, and directivity that hardly irradiates other cells 12 such as other Directivity that does not affect the power generation amount of the cell 12 is included. The light emitted from each light source 2 passes through an optical system such as a reflector, a condensing lens, and a collimator lens, for example, and is adjusted so as to have directivity that is not irradiated to any cell 12 other than the corresponding one cell 12. Is done.

Each light source 2 is preferably a light source capable of irradiating pseudo-sunlight having a spectral distribution substantially similar to that of sunlight, for example. Each light source 2 is preferably a light source capable of emitting light having an irradiance ranging from 0 W / m ² to 1000 W / m ² , for example. The irradiance is adjusted, for example, by controlling the power supplied to each light source 2 by the irradiation controller 6.

  Each light source 2 preferably does not generate or hardly generates electromagnetic wave noise, and is preferably a xenon lamp, a halogen lamp, or an infrared laser, for example. Moreover, you may provide the shielding part which shields electromagnetic wave noise around each light source 2. FIG. Thereby, even if electromagnetic wave noise is emitted from the irradiation part 1, it can suppress that electromagnetic wave noise leaks around.

  The irradiation control unit 6 controls the irradiation light amount of each light source 2 independently. Thereby, each light source 2 irradiates each of the plurality of cells 12 with light having different irradiance. The irradiation control unit 6 includes a light source power device 7, a circuit 8, and a control device 9.

  The light source power device 7 is a device that supplies predetermined power to the irradiation unit 1 via the circuit 8.

  The circuit 8 controls the electric power supplied to each light source 2 to dimm each light source 2, and controls the on / off of energization to each light source 2 to blink each light source 2 (on / off) And a blinking circuit.

  The control device 9 independently controls the amount of light emitted from each light source 2 by a dimming circuit, and independently controls on / off of each light source 2 by a blinking circuit. Note that the control device 9 may collectively control on / off of each light source 2 by a blinking circuit. The control device 9 has a storage unit, and the storage unit stores a condition table described later.

(Operation of solar cell module evaluation device)
An example of the operation of the solar cell module evaluation apparatus of this embodiment will be described.

FIG. 2 is a diagram illustrating an example of shadow distribution and cell output distribution. Specifically, FIG. 2 (a) shows a scene where the vehicle passes through a tunnel in the tunnel. FIG. 2B shows a shadow distribution on the solar cell module 11 when a vehicle is present at a position surrounded by a broken line in FIG. FIG. 2C shows the output distribution of the cell 12 in the case of the shadow distribution of FIG. FIG.2 (d) has shown the waveform of the electromagnetic wave noise which generate | occur | produces from the solar cell module 11 at the time of the shadow distribution of FIG.2 (b). In FIGS. 2B and 2C, the traveling direction of the vehicle is indicated by an arrow. Further, in FIG. 2C, the output of each cell 12 is shown as a relative value (%) with respect to the output when 1000 W / m ² of light is irradiated. In FIG. 2D, the horizontal axis indicates the frequency (kHz), and the vertical axis indicates the noise level (dBm).

  As shown in FIGS. 2A and 2B, when the vehicle passes through a tunnel and a shadow is distributed over most of the cells 12 on the front side of the vehicle, the output (power generation amount) of each cell 12 2) is small in the cell 12 on the front side of the vehicle and larger in the cell 12 on the rear side of the vehicle, as shown in FIG. Moreover, the electromagnetic wave noise which generate | occur | produces from the solar cell module 11 has the characteristic shown in FIG.2 (d).

FIG. 3 is a diagram illustrating another example of the shadow distribution and the cell output distribution. Specifically, FIG. 3A shows a scene in which the vehicle is passing through a shade with a sunbeam. FIG. 3B shows a shadow distribution on the solar cell module 11 when a vehicle is present at a position surrounded by a broken line in FIG. FIG. 3C shows the output distribution of the cell 12 in the case of the shadow distribution of FIG. FIG. 3D shows a waveform of electromagnetic noise generated from the solar cell module 11 when the shadow distribution of FIG. In FIGS. 3B and 3C, the traveling direction of the vehicle is indicated by an arrow. In FIG. 3C, the output of each cell 12 is shown as a relative value (%) with respect to the output when 1000 W / m ² of light is irradiated. In FIG. 3D, the horizontal axis indicates the frequency (kHz) and the vertical axis indicates the noise level (dBm).

  As shown in FIGS. 3 (a) and 3 (b), when the vehicle passes through a shade with a sunlight leaking and a shadow is distributed over most of the cells 12 on the right side of the vehicle, the output of each cell 12 is as shown in FIG. As shown in FIG. 3 (c), it is smaller in the cell 12 on the right side of the vehicle and larger in the cell 12 on the left side of the vehicle. Further, the electromagnetic wave noise generated from the solar cell module 11 has the characteristics shown in FIG. 3 (d), unlike FIG. 2 (d).

  As described above, when the solar cell module 11 is installed in the vehicle, the amount of light applied to each cell 12 of the solar cell module 11 varies depending on traveling conditions such as when the vehicle passes through a shaded place. When the amount of light irradiated to each cell 12 changes, the waveform of the electromagnetic wave noise generated from the solar cell module 11 changes due to fluctuations in the characteristics of the solar cell module 11. As a result, reception of radio broadcasts may be disturbed by electromagnetic noise, for example.

  This is because the current path in the solar cell module 11 changes due to the shadow, and the distance between the antenna installed near the solar cell module (for example, the roof antenna installed on the roof of the vehicle) and the current path changes. It is to do. Specifically, when the distance between the antenna and the current path is short, electromagnetic wave noise is likely to be mixed into the antenna as compared with the case where the distance between the antenna and the current path is long.

  FIG. 4 is a diagram showing still another example of the shadow distribution and the cell output distribution. Specifically, FIG. 4A shows a scene in which the vehicle passes a specific shadow. FIG. 4B shows a change in the output (voltage) of the cell 12a when the vehicle moves along the broken line arrow Y in FIG. FIG. 4C shows a change in the output of the cell 12b when the vehicle moves along the broken line arrow Y in FIG.

  As shown in FIG. 4, when a vehicle passes a specific shadow, the output of the cell 12a and the cell 12b may change greatly in a short time. When the output of the cell 12a and the cell 12b changes greatly in a short time, electromagnetic wave noise is generated from the solar cell module 11, and may affect, for example, an antenna installed in the vicinity of the solar cell module 11. .

  As described above, when the current path in the solar cell module 11 is changed by the shadow, or when the output of the cell 12 is greatly changed in a short time by the shadow, electromagnetic noise is generated from the solar cell module 11, and other antennas or the like are generated. May affect the equipment. For this reason, the solar cell module evaluation apparatus which can reproduce the influence of a shadow and can evaluate the characteristic of the solar cell module 11 is calculated | required. However, in the conventional apparatus that evaluates the characteristics of the solar cell module 11 using one light source, it is difficult to evaluate the characteristics of the solar cell module 11 by reproducing the shadow distribution on the solar cell module 11. .

  Therefore, hereinafter, the operation of the solar cell module evaluation apparatus according to the first embodiment and the second embodiment, which can reproduce the influence of the shadow and evaluate the characteristics of the solar cell module 11, will be described.

[First Embodiment]
In the solar cell module evaluation apparatus according to the present embodiment, the irradiation control unit 6 independently controls the irradiation light amount of each of the plurality of light sources 2 provided corresponding to each of the plurality of cells 12, so that the influence of shadows is suppressed. The characteristics of the solar cell module 11 can be evaluated by reproducing. Hereinafter, this will be specifically described with reference to FIGS.

  In the solar cell module evaluation apparatus of the present embodiment, the irradiation control unit 6 is based on a condition table defined corresponding to a situation (hereinafter referred to as “market environment assumption scene”) assuming a market environment to be reproduced. The amount of light emitted from the light source 2 to each cell 12 is controlled. In the condition table, the irradiation light quantity of each light source 2 is determined for each market environment assumed scene.

  The condition table is, for example, each light source 2 when the irradiation light amount of each light source 2 is controlled so that the power generation amount is the same as the power generation amount of each cell 12 when the vehicle passes through a market environment assumption scene to be reproduced. Determined by the power supplied to the. Thereby, the environment similar to the light irradiated to each cell 12 in the market environment assumption scene to reproduce can be created. This is because even if the position, area, and amount of light per unit area of the light irradiated to the cell 12 are different, the amount of light irradiated to the entire cell 12 (area × light amount per unit area) is the same. This is because the power generation amount of the cells 12 is the same.

  FIG. 5 is a diagram showing the relationship between how the light strikes the cell (the position and area of the irradiated light and the amount of light per unit area) and the amount of power generated by the cell. The upper left side of FIG. 5 shows a case where a large amount of light (light amount L) is irradiated on the upper right portion (area S) of the cell. The upper center of FIG. 5 shows a case where a large amount of light (light amount L) is irradiated to the left center portion (area S) of the cell. The upper right side of FIG. 5 shows a case where the lower part (area S × 2) of the cell is irradiated with light with a small amount of light (light amount L × 1/2). In these cases, at least one of the irradiated position, area, and light amount per unit area is different, but since the light amount irradiated to the entire cell 12 is the same (light amount S × L), the power generation of the cell 12 The amount will be the same. In FIG. 5, the power generation amount of each cell 12 is 60%.

  FIG. 6 is a diagram illustrating a condition table in the first embodiment. FIG. 7 is a diagram illustrating an output distribution of each cell when light is irradiated based on the condition table. 7A shows the output distribution of each cell when irradiated with light based on the condition table A, and FIG. 7B shows the output distribution of each cell when irradiated with light based on the condition table B. Show.

  Each condition table is stored in the storage unit. For example, as shown in FIG. 6, each condition table defines light irradiation conditions for each light source 2 (for example, power supplied to the light source 2). . FIG. 6 shows two condition tables (condition table A and condition table B) as an example. In the condition table A and the condition table B, the power (%) supplied to the light source 2 is determined for each light source ID. The power (%) supplied to the light source 2 is determined as a ratio when the rated power of the light source 2 is 100%, for example.

  When the market environment assumption scene to be reproduced is “blow-through in tunnel”, the irradiation control unit 6 refers to a condition table (for example, condition table A) corresponding to “blow-through in tunnel”, and the power supplied to each light source 2 is The circuit 8 is controlled so as to have the power determined in the condition table A. Thereby, the irradiation light quantity of each light source 2 is adjusted. At this time, as shown in FIG. 7A, the output distribution similar to the output distribution of the cell 12 (see FIG. 2C) in the case of the shadow distribution when the vehicle passes through the “tunnel tunnel”. Can be obtained. That is, it is possible to evaluate the characteristics of the solar cell module 11 by reproducing the influence of the shadow when the vehicle passes through the “tunnel tunnel”.

  When the market environment assumed scene to be reproduced is “a tree-shaded sunbeam”, the irradiation control unit 6 refers to a condition table (for example, the condition table B) corresponding to the “tree-shaded treelight” and the power supplied to each light source 2 is The circuit 8 is controlled so that the power is determined in the condition table B. Thereby, the irradiation light quantity of each light source 2 is adjusted. At this time, as shown in FIG. 7B, the output distribution similar to the output distribution of the cell 12 (see FIG. 3C) in the case of the shadow distribution when the vehicle passes through the “sunlight through the shade of trees”. Can be obtained. That is, it is possible to evaluate the characteristics of the solar cell module 11 by reproducing the influence of the shadow when the vehicle passes through the “sunlight through the shade of trees”.

  Moreover, the solar cell module evaluation apparatus of this embodiment can be used by installing it in an anechoic chamber free from external radio waves and radio echoes. Thereby, it is possible to reproduce the influence of the shadow when the vehicle passes through the shadowed place and measure the electromagnetic wave noise generated from the solar cell module 11, for example, whether the reception of the radio broadcast is obstructed. Can be confirmed.

  FIG. 8 is a diagram showing electromagnetic noise generated from the solar cell module when light is irradiated based on the condition table. 8A shows electromagnetic wave noise generated from the solar cell module when irradiated with light based on the condition table A, and FIG. 8B shows the solar cell module when irradiated with light based on the condition table B. The electromagnetic wave noise which generate | occur | produces from is shown.

  When the market environment assumption scene to be reproduced is “blow-through in tunnel”, the irradiation control unit 6 refers to a condition table (for example, condition table A) corresponding to “blow-through in tunnel”, and the power supplied to each light source 2 is The circuit 8 is controlled so that the power is determined in the condition table. Thereby, the irradiation light quantity of each light source 2 is adjusted. At this time, as shown in FIG. 8, it is the same as the waveform of the electromagnetic wave noise generated from the solar cell module 11 in the shadow distribution when the vehicle is passing through the “tunnel in the tunnel” (see FIG. 3C). Waveform can be obtained. That is, it is possible to evaluate the characteristics of the solar cell module 11 by reproducing the influence of the shadow when the vehicle passes through the “tunnel tunnel”.

  When the market environment assumed scene to be reproduced is “a tree-shaded sunbeam”, the irradiation control unit 6 refers to a condition table (for example, the condition table B) corresponding to the “tree-shaded treelight” and the power supplied to each light source 2 is The circuit 8 is controlled so that the power is determined in the condition table. Thereby, the irradiation light quantity of each light source 2 is adjusted. At this time, as shown in FIG. 8B, the waveform of the electromagnetic wave noise generated from the solar cell module 11 in the case of the shadow distribution when the vehicle passes through the “sunlight through the shade of trees” (see FIG. 3D). ) Can be obtained. That is, it is possible to evaluate the characteristics of the solar cell module 11 by reproducing the influence of the shadow when the vehicle passes through the “sunlight through the shade of trees”.

  In the present embodiment, each light source 2 when the irradiation light amount of each light source 2 is controlled so as to be the same as the power generation amount of each cell 12 when the vehicle passes through the market environment assumption scene to be reproduced. The form in which the electric power supplied to is defined in the condition table has been described. However, the present embodiment is not limited to this, and the condition table may be defined by other methods. Specifically, when the irradiation light quantity of each light source 2 is controlled so as to have the same waveform as the waveform of electromagnetic wave noise generated from the solar cell module 11 when the vehicle passes through a market environment assumption scene to be reproduced. It may be determined by the electric power supplied to each light source 2.

[Second Embodiment]
In the first embodiment, the mode of evaluating the characteristics of the solar cell module 11 by reproducing the influence of a shadow when a vehicle is present at a specific position in a predetermined market environment assumed scene has been described. 2nd Embodiment demonstrates the form which reproduces the influence of the shadow which changes while a vehicle passes a predetermined | prescribed market environment assumption scene, and evaluates the characteristic of the solar cell module 11. FIG.

  In the solar cell module evaluation apparatus according to the present embodiment, the irradiation control unit 6 independently controls the irradiation light amount of each of the plurality of light sources 2 provided corresponding to each of the plurality of cells 12, so that the influence of shadows is suppressed. The characteristics of the solar cell module 11 can be evaluated by reproducing. Hereinafter, this will be specifically described with reference to FIG. FIG. 9 is a diagram illustrating a condition table in the second embodiment.

  In the solar cell module evaluation apparatus according to the present embodiment, the irradiation control unit 6 determines the amount of light that each light source 2 irradiates each cell 12 based on a condition table that is determined corresponding to a market environment assumption scene that is to be reproduced. Control. In the condition table, the irradiation light quantity of each light source 2 is determined for each market environment assumed scene.

  For example, when the condition table controls the irradiation light quantity of each light source 2 so that the output (voltage) is the same as the output (voltage) of each cell 12 when the vehicle passes through a market environment assumption scene to be reproduced. Determined by the electric power supplied to each light source 2.

  As shown in FIG. 9, in the condition table, the light irradiation conditions for each light source 2 (for example, power supplied to the light source 2) are determined along with the time axis. FIG. 9 shows one condition table (condition table a) as an example. In the condition table a, the power (%) supplied to the light source 2 for each light source ID is determined along with the time axis. The power (%) supplied to the light source 2 is determined as a ratio when the rated power of the light source 2 is 100%, for example.

  As shown in FIG. 4, when the vehicle passes a specific shadow, the irradiation control unit 6 refers to a condition table (condition table a) corresponding to the case where the vehicle passes a specific shadow, and sets the condition table a. The circuit 8 is controlled so as to obtain a predetermined power. Thereby, the irradiation light quantity of each light source 2 is adjusted. At this time, it is possible to obtain an output distribution similar to the output distribution of the cell 12 in the case of the shadow distribution when the vehicle passes through a specific shadow. Moreover, the waveform similar to the waveform of the electromagnetic wave noise which generate | occur | produces from the solar cell module 11 at the time of shadow distribution in case the vehicle is passing the specific shadow can be obtained. That is, the characteristics of the solar cell module 11 can be evaluated by reproducing the influence of the shadow that changes while the vehicle passes through the specific shadow.

  In the present embodiment, the light source 2 is supplied to each light source 2 when the irradiation light amount of each light source 2 is controlled so that the power generation amount is the same as the power generation amount of each cell 12 when the vehicle passes a specific shadow. The form in which the condition table is determined by the power has been described. However, the condition table may be defined by other methods. Specifically, the light source 2 is supplied to each light source 2 when the irradiation light quantity of each light source 2 is controlled so as to have the same waveform as the waveform of the electromagnetic wave noise generated from the solar cell module 11 when the vehicle passes a specific shadow. May be determined by the power to be generated.

  The solar cell module evaluation apparatus has been described above by way of the embodiment. However, the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Irradiation part 2 Light source 6 Irradiation control part 7 Light source power unit 8 Circuit 9 Control unit 11 Solar cell module 12 Cell

Claims (1)

An apparatus for evaluating characteristics of a solar cell module in which a plurality of cells are electrically connected,
An irradiation unit including a plurality of light sources provided corresponding to each of the plurality of cells;
An irradiation controller that independently controls the amount of light emitted from each of the plurality of light sources;
A solar cell module evaluation apparatus comprising:

Images