JP2005136237A - Photovoltaic generation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photovoltaic generation system which exhibits decorativeness or a displaying property even in the daytime by utilizing the electric power generated by solar cell panels and from which faults can be detected easily. <P>SOLUTION: A photovoltaic generator is provided with a group of solar cell modules constituted by arranging a plurality of solar cell modules provided with luminous bodies. The photovoltaic generation system is constituted to detect the faults of the solar cell modules, by wiring power lines for solar cell modules which transmit the electric power generated by individual solar cell module to the modules so that the modules may be connected in series, and connecting the positive pole sides of applying power lines for luminous bodies which are drawn out from a DC power supply and supply driving power to the luminous bodies to the anode sides of the luminous bodies and the positive pole sides of the power lines for solar cell modules to the cathode sides of the luminous bodies. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a photovoltaic power generation apparatus in which a plurality of light emitters are attached to a solar cell module, and in particular, a light emitter such as an LED is disposed on these solar cell modules, and an external device is provided so as to obtain display properties and decorativeness. The present invention relates to a photovoltaic power generation system configured to be lit using a DC power source and further configured to detect a failure of the solar cell module.

  In general, a photovoltaic power generation apparatus is configured such that a solar cell array is arranged on a roof of a house, etc., and sunlight is photoelectrically converted to obtain electric power.

  This use example will be described with reference to FIG. 13, FIG. 14 and FIG.

  FIG. 13 shows a case where the solar power generation device 2 is arranged on the roof of the house 1. FIG. 14 is a schematic cross-sectional view of individual solar cell modules 4 constituting the solar cell array 3 in the solar power generation device 2. It is.

  According to the solar power generation device 2 shown in FIG. 13, a plurality of solar cell modules 4 are arranged to form the solar cell array 3, and the power generated by the solar cell array 3 is converted into the power cable 5 and the connection box 6. Then, power is transmitted to the grid interconnection inverter (power conditioner) 7.

  More specifically, according to the solar cell array 3, a plurality of solar cell modules 4 are connected in series to form a string. The strings are arranged in one row, or two or more rows are collected.

  The electric wires of the power cable 5 are provided according to the number of such strings. The electric wires of the electric power cable 5 are connected in parallel by the connection box 6 and the direct-current power generated by the solar cell array 3 is converted into alternating-current power. It inputs into the grid connection inverter (power conditioner) 7 to convert, can supply to a general alternating current load, or can be sold to an electric power company by grid connection.

  According to the solar cell module 4 shown in FIG. 14, reference numeral 8 denotes a solar cell element, which is configured to obtain electric power by using a photoelectric conversion effect of a semiconductor made of, for example, silicon. A plurality of solar cell elements 8 are electrically connected in series and in parallel and covered with a weather-resistant material so as to obtain a required output voltage and output current.

  In the solar cell module 4, a light transmission plate 9 such as a glass plate or a synthetic resin plate is disposed on the light receiving surface of the solar cell element 8, and a Teflon (R) film or PVF (PVF (non-light receiving surface) is provided on the back surface thereof. A weather resistant film 10 such as polyvinyl fluoride or PET (polyethylene terephthalate) is applied, and the light transmitting plate 9, the solar cell element 8 and the weather resistant film 10 are stacked on a rectangular main body. The periphery of each side is mounted so as to sandwich a frame 11 made of aluminum metal, SUS, or the like, thereby increasing the strength of the entire solar cell module 4.

  Further, a junction box 12 made of synthetic resin such as ABS resin or aluminum metal is bonded to the back surface of the solar cell module 4, that is, on the weather resistant film 10, and a terminal for taking out the output power of the solar cell module 4. And

  As described above, the solar power generation device 2 is usually used for power generation that converts sunlight into electricity.

  However, in recent years, as described above, by using a configuration in which a plurality of solar cell elements of the same shape are arranged inside a solar cell module, the color of some solar cell elements is different from the color of other elements, A technique has been proposed in which letters and patterns are constructed on a battery module (or solar cell array) to provide design properties. Further, according to Patent Document 1, a glass plate is arranged on the light receiving surface side so that it can be visually recognized at night, an LED is provided at the end, and the light receiving surface of the solar cell module is caused to emit light by this LED. Has been described.

  FIG. 15 shows a configuration in which an LED is provided at the end of the glass plate on the light receiving surface side as in the solar cell module described in Patent Document 1.

  The figure is a schematic sectional view of the solar cell module 13. In addition, the same code | symbol is described in the same location as the solar cell module 4 shown in FIG.

  In this solar cell module 13, the LEDs 14 are arranged toward the end face of the light transmission plate 9, and other configurations are the same as those of the solar cell module 4 shown in FIG. 14.

  According to the solar cell module 13 having the above-described configuration, it is possible to light up the solar cell element 8 at night by irradiating the end face of the light transmission plate 9 with the LED 14.

  Further, according to Patent Document 2, when a light emitter is incorporated in a solar cell module and a failure occurs in the solar cell module, the failure is indicated by the light emission of the light emitter, thereby causing an abnormal sun. It was proposed that the task of identifying the battery module became easier, and as a result, it was possible to eliminate the conventional problem of requiring a lot of time and labor for quick recovery toward normal power generation. ing.

  Although it is not a solar cell module having design properties for reference, a known technique in which a light emitter such as an LED is incorporated in the solar cell module will be described below.

In the safety warning light shown in Patent Document 3, it is described that, by using a power-saving light emitting diode and combining with a storage battery, electricity from the storage battery is supplied to the light emitting diode to emit light. .
Japanese Patent Laid-Open No. 2003-92008 JP-A-9-148613 Japanese Utility Model Publication No. 6-86187

  However, like the solar cell module described in Patent Document 1, by providing the LED, it is possible to light up the solar cell element at night, but for the configuration for detecting a failure of the solar cell module with the LED, It is not described at all.

  On the other hand, in Patent Document 2, when a light emitter is incorporated in the solar cell module and a failure occurs in the solar cell module, the failure is indicated by the light emission of the light emitter, thereby causing a failure in the solar cell. Although a technique for specifying a module has been proposed, there is no description of using this light emitter for decoration.

  Moreover, according to the technique described in Patent Document 2, a bypass diode is provided for each solar cell module, and when a certain solar cell module becomes a shadow or the like and the output drops, power generation of the adjacent solar cell module is performed. The solar cell module whose output is reduced by letting the current flow to the next solar cell side with a bypass diode is prevented from becoming a resistance.

  Therefore, according to the configuration in which a light emitter such as an LED or a lamp is arranged in series with the bypass diode, the current of the adjacent solar cell module can be obtained by using a light emitter having a high resistance (low power consumption) such as an LED. However, there is a problem that the function of the bypass diode is lost by the illuminator.

  Moreover, according to the solar cell module of Patent Document 1, there are the following problems.

  According to the solar cell module of Patent Document 1 described above, in order to supply power to the light emitter incorporated in the solar cell module 13, the power generated by the solar cell module 13 is transmitted to the outside through the junction box 12. In addition to the power cable to be used, another power line must be provided.

  For example, as shown in FIG. 13, in the solar power generation device 2 having a large number of solar cell modules 4, the power cable 5 or the connection box 6 routed from the roof of the house to the connection box 6 and the power conditioner 7 are connected. In addition to the power cable to be used, a power line 30 for supplying power to a light emitter such as the LED 14 is required.

  However, when the power line 30 is placed between the roof and the power source, the finished outer diameter of the electric wire is increased due to the problem of weather resistance.

  Therefore, by newly drawing the electric wire, the aesthetics of the house is impaired, and the stress of the electric wire with respect to the light emitter is increased, thereby causing problems such as a decrease in adhesion to the solar cell module and disconnection.

  As a countermeasure, it is conceivable to clamp the electric wire, but there is another problem that the operation becomes complicated. In addition, there is a problem that the number of the power lines 30 for lighting the light emitters along the power cable 5 is increased, and the wiring work is complicated.

  As shown in FIG. 13, the power is supplied to the light emitter 3 separately from the power cable 5 routed from the roof of the house to the connection box 6 and the power cable connecting the connection box 6 and the power conditioner 7. It is a wiring diagram at the time of providing the power line 30 to supply.

  According to this example, it is a case where two LED14 is arrange | positioned with respect to each solar cell module.

  Such an LED 14 may be provided with an LED at the end of the glass plate on the light receiving surface side as in the solar cell module described in Patent Document 1, for example, and the number of LEDs may be one or two or more. Good.

  FIG. 15 is a schematic cross-sectional view of such a solar cell module 13. In addition, the same code | symbol is described in the same location as the solar cell module 4 shown in FIG.

  In this solar cell module 13, the LEDs 14 are arranged so as to emit light toward the end face of the light transmission plate 9, and other configurations are the same as those of the solar cell module 4 shown in FIG. 14.

  According to this example, four solar cell modules 13a, 13b, 13c, and 13d are arranged, and the transmission cables Sa, Sb, Sc, and Sd are respectively connected to the junction boxes of the solar cell modules 13a, 13b, 13c, and 13d. Is connected. These power transmission cables Sa, Sb, Sc, and Sd extend to the junction box 6. Further, the connection box 6 and the power conditioner 7 are also connected to the power transmission cable Sp and connected to the commercial power system B.

  Actually, each of the solar cell modules 13a, 13b, 13c, and 13d generates power with a direct current, so that the power transmission cables Sa, Sb, Sc, Sd and the power transmission cable Sp are two lines.

  On the other hand, AC power from the commercial power system B flows through the LED power transmission cable L through the lighting control circuit T and causes each LED 14 to emit light.

  Incidentally, as described above, the power line 30 provided between the roof and the power source corresponds to the power transmission cables Sa, Sb, Sc, Sd and the LED power transmission cable L.

  For reference, problems for Patent Document 2 and Patent Document 3 are also described.

  Patent Document 2 unifies the addition of wiring by integrating the solar cell module and the storage battery, but on the other hand, the structure of the solar cell module is complicated, and further, letters and patterns are constructed by light emission as a solar cell array. When the solar cell module does not emit light, it becomes an extra member. Further, if a solar cell module without a light emitting function is used for a portion that does not emit light, it was not possible to respond appropriately to changes in characters and patterns.

  Further, as in Patent Document 3, the same applies to the case where a failure display LED is provided, and even when the light emitter is arranged on the frame of the solar cell module, the energization unit that supplies power to the light emitter is a module. The insulation state must be managed so that it does not short-circuit with the frame.

  Thus, when using LED with respect to a solar cell module, it was conventionally used for the signal display like the light-up with respect to this solar cell element, and patent document 2 or patent document 3. FIG. However, no technique has been proposed yet for arranging a plurality of LEDs so as to improve display properties and decorative properties and enabling efficient wiring.

  In addition, when the LED is made to emit light, the light emission becomes noticeable in a dim state or at night. On the other hand, there is still a technique for obtaining the decorativeness and display property by emitting light even in the daytime. Not proposed.

  In addition, with respect to a solar cell module having a light emitter as described above, a technology that makes it easy to detect a failure of the module has not yet been fully researched and developed.

  Accordingly, an object of the present invention is to provide a photovoltaic power generation system that uses a luminous body to provide decorativeness and display properties even in the daytime.

  Another object of the present invention is to provide a solar power generation system in which failure detection of a solar cell module can be easily performed.

  Still another object of the present invention is to provide a photovoltaic power generation system in which a failure of a solar cell module can be easily understood even in the daytime.

  The solar power generation system of the present invention includes a solar cell module group in which a plurality of solar cell modules each including a light emitter are arranged, and the generated power generated in each of the solar cell modules with respect to the plurality of solar cell modules. The solar cell module power lines that transmit power are wired so that these solar cell modules are connected in series, and the positive electrode side of the light emitter applied power line that supplies the drive power to the light emitter by drawing out from the DC power source is the light emitter. The solar cell module power line is connected to the cathode side of the light emitter and the positive side of the solar cell module power line is connected to detect a failure of the solar cell module.

  The other solar power generation system of the present invention, the solar power generation device includes a plurality of solar cell module power lines, and each solar cell module group is arranged corresponding to each solar cell module power line, A backflow prevention diode is connected to the solar cell module power line so as to prevent the generated power from flowing back to the other solar cell module groups.

  Still another photovoltaic power generation system according to the present invention is characterized in that the backflow prevention diode is mounted in a connection box, and the power line for the solar cell module drawn out from the connection box is formed as an electric circuit for supplying power to the light emitter. And

  The photovoltaic power generation system according to the present invention is characterized in that the backflow prevention diode is connected so as to flow power back to the system via a power conditioner.

  The solar power generation system of the present invention is characterized in that the solar cell module is formed by arranging a plurality of solar cell elements in a planar shape and arranging a light emitter between these solar cell elements.

  Furthermore, the photovoltaic power generation system of the present invention is characterized in that the DC power source is obtained by converting AC power of a commercial power system into DC.

  In the photovoltaic power generation system of the present invention, the light emitter is an LED.

  As described above, according to the solar power generation system of the present invention, as described above, in the solar cell module group in which a plurality of solar cell modules provided with light emitters are arranged, power generation generated in individual solar cell modules. The solar cell module power lines for transmitting power are wired so that these solar cell modules are connected in series, and light is emitted from the positive electrode side of the light emitter applied power line that is drawn from a DC power source and supplies driving power to the light emitter. Connected to the anode side of the body, and the cathode side of the solar cell module power line is connected to the cathode side of the luminous body so as to detect the failure of the solar cell module. The detection becomes easy, and the failure of the solar cell module can be easily understood even in the daytime, and the convenience is improved.

  Further, according to the present invention, the solar cell module power lines that transmit the generated power generated in the individual solar cell modules are connected to the plurality of solar cell modules, respectively, and each solar cell module power line is connected. In order to prevent the generated power from flowing backward to each of the other solar cell modules, a backflow prevention diode is connected, and the positive electrode side of the light emitter applied power line that supplies the drive power to the light emitter by being drawn from the DC power source is connected to the anode of the light emitter. By connecting the positive electrode side of the solar cell module power line to the cathode side of this light emitter, the light emitter can be lit even during daytime by supplying power from outside.

  On the other hand, even at night, the solar cell module power line can be used to supply power to the light emitter to emit light.

  Moreover, according to the solar power generation system of the present invention, the power line for the solar cell module connected to the solar cell module is formed as an electric path for supplying power to the light emitter, so that the increase and handling of the power line can be reduced as much as possible. Thereby, a wiring member and construction work can be reduced without impairing the beauty of the house.

  In addition, according to the present invention, such a power line for a solar cell module is used as an electric circuit for supplying power to the light emitter, so that a combination structure of the solar cell module and the light emitter can be easily achieved, and a desired decoration is provided. Sexuality, aesthetics, and display can be easily obtained.

  Hereinafter, the photovoltaic power generation system of the present invention will be described in detail with reference to the drawings.

  1 to 4 are wiring diagrams for explaining wiring to the light emitter of the photovoltaic power generation apparatus according to the present invention, and FIG. 6 is a schematic cross-sectional view for schematically explaining the solar cell module 15 of the photovoltaic power generation apparatus according to the present invention. FIG. 7 is an enlarged view of a main part of the solar cell module 15, and FIG. 8 is a top view showing a region where the light emitter can be attached in the solar cell module 15.

  FIG. 9 is a partially transparent view for explaining how the external light is blocked by the solar cell element in the solar cell module 15.

  10 and 11 are schematic cross-sectional views schematically illustrating another solar cell module of the solar power generation apparatus according to the present invention, and FIG. 12 is solar light in which the solar power generation apparatus is arranged on the roof of the house 1a. It is a perspective view of a power generation system.

  Also in the solar power generation system of the present invention, for example, as shown in FIG. 12, the solar power generation device is arranged on the roof of the house 1a. In addition, the same code | symbol is attached | subjected to the same location as the house 1 shown in FIG.

  Hereinafter, the solar cell module 15 which comprises this solar power generation device is described.

  As shown in FIG. 6, the solar cell module 15 is formed by connecting a predetermined number of solar cell elements 16 (16a to 16e) mainly made of silicon or the like in series and in parallel to obtain arbitrary output voltage and output current. I am doing so.

  In this example, a plurality of solar cell elements 16 (16a to 16e) are arranged in a matrix. This solar cell element is constituted by a crystalline solar cell such as single crystal or polycrystalline silicon, or a thin film solar cell.

  A light transmitting plate 17 such as a glass plate or a synthetic resin plate is disposed on the light receiving surface of these solar cell elements 16, and a light transmissive Teflon (R) film or PVF (polyfluoric film) is provided on the other non-light receiving surface (back surface). A weather resistant film 18 such as vinyl chloride or PET (polyethylene terephthalate) is applied. Instead of using such a synthetic resin material, a glass plate may be used.

  A transparent synthetic resin made of, for example, EVA (ethylene-vinyl acetate copolymer resin) or the like is interposed between the light transmission plate 17 and the weather resistant film 18 to form the filler 19.

  In the solar cell module 15 having such a configuration, a junction box 20 made of ABS resin, aluminum metal, or the like is bonded to the outside of the weather-resistant film 18 on the non-light-receiving surface (back surface) side. And it is set as the terminal so that output electric power may be taken out through this junction box 20.

  According to such a solar cell module 15, it is generally rectangular, but a frame body 21 that sandwiches the four sides around the main body is provided, and the main body of the solar cell module 15 is supported by the frame body 21, so that the overall strength is increased. Has improved.

  Such a frame 21 is made of, for example, aluminum metal or SUS.

  As described above, a predetermined number of solar cell elements 16 (16a to 16e) are connected in series and in parallel, but the number of series and parallel is determined in order to obtain a predetermined output power.

  And in such an arrangement | sequence, the clearance gap 22 is provided for the wiring of the positive electrode of the adjacent solar cell elements 16 (16a-16e), a negative electrode, and a short circuit prevention.

  For example, there is a gap 22a between the solar cell element 16a and the solar cell element 16b, a gap 22b between the solar cell element 16b and the solar cell element 16c, and a gap between the solar cell element 16c and the solar cell element 16d. A gap 22d exists between the gap 22c and the solar cell element 16d and the solar cell element 16e.

  According to the solar power generation device of the present invention, in the solar cell module 15 in which the plurality of solar cell elements 16 (16a to 16e) are arranged in a planar shape as described above, each of these solar cell elements 16 (16a to 16e) is further provided. The light emitters 23 are arranged between them, and the light emitters 23 are caused to emit light with these solar cell elements 16 as the back.

  According to this example, the light emitter 23a is disposed corresponding to the gap 22a, the light emitter 23b is disposed corresponding to the gap 22b, the light emitter 23c is disposed corresponding to the gap 22c, and the light emitter 23d is disposed corresponding to the gap 22d. To do.

  Examples of the light emitters 23 (23a to 23e) include lamps such as LEDs (light emitting diodes) and halogen bulbs.

  And these light-emitting bodies 23 (23a-23e) have good weather resistance which consists of an acrylic double-sided adhesive tape, an acrylic adhesive, a silicon-type adhesive material (resin) etc. on the weather resistant film 18, and later Attach with an adhesive member that is easy to remove.

  As shown in FIG. 7, after the light irradiated from the light emitter 23 passes through the weather-resistant film 18 on the non-light-receiving surface, the gap 22 (22a-22d) of the solar cell element 16 (16a-16e) is filled. The light-transmitting filler 19 is transmitted through the light-transmitting plate 17, and the light emission (luminance) of the light-emitting body 23 can be visually recognized.

  According to the present invention, the solar cell module 15 in which a plurality of solar cell elements 16 (16a to 16e) are arranged in a matrix form allows the gaps 22 between the solar cell elements 16 (16a to 16e) to be as shown in FIG. As shown in FIG. 4, the shape is a lattice (the hatched portion in the figure).

  Thus, according to the solar cell module 15 of the photovoltaic power generation apparatus of the present invention, the light emitters 23 may be arranged at any position with respect to the lattice-like gaps 22, thereby obtaining the required display and decoration. It was.

  Moreover, in the light-emitting body 23 for display and decoration, the brightness | luminance became high by arrange | positioning the non-light-emitting solar cell element 16 (16a-16e) on the back surface of the light emission. In particular, the blue and dark blue solar cell elements 16 are arranged on the back side of the light emission, so that the luminance becomes remarkable.

  Furthermore, according to the lattice-shaped gap 22 as described above, the gap 22 becomes a shadow because the back side of the solar cell module is shielded by a roof or the like in a region other than the portion where the light emitter 23 is disposed. For example, the brightness of the light-emitting body 23 becomes conspicuous compared to such a region.

  In the solar cell module 15 having a configuration in which the gap 22 is also provided between the solar cell element 16 and the frame body 21, the light emitters 23 are arranged in the gap 22, thereby further improving the display property and The decorativeness may be enhanced.

  The above points will be described with reference to FIG.

  This figure is a cross-sectional view taken along section line AA shown in FIG.

  According to FIG. 9 showing the optical path of the extraneous light, the extraneous light indicated by an arrow (broken line) is blocked by the solar cell element 16 after passing through the light transmission plate 17, and it is difficult for the light to reach below the gap 22. Thus, in the gap 22, a darker portion than the surroundings is created on the front surface of the light emitter 23, and as a result, contrast is generated, and the light emitted from the light emitter 23 can be viewed brighter.

  As described above, when there is extraneous light during the daytime or the like, the light emission is weakened only by the luminance of the light emitter 23. However, as in the present invention, a light shielding object (solar cell in the present invention) is placed in front of the light emitter 23. By providing (corresponding to the element 16), light emission of the light emitter 23 becomes remarkable. Therefore, the brightness can be improved without increasing the quantity of the light emitters 23, thereby reducing the number of parts and reducing the power consumption.

  For reference, if it is assumed that there is no light-shielding object in front of the light emitter 23, that is, normally, in order to efficiently extract the light emitted by the light emitter such as an LED or a light bulb to the outside, the light emitter. It is conceivable that a cover made of a transparent or translucent glass material or a resin material is provided around the periphery. However, when sunlight is received in the daytime, the illuminant is illuminated with sunlight, and the illuminance of the entire illuminant increases, so that the illuminant emits light and the surrounding brightness. As a result, not only the contrast is lowered, but in the case of a structure having a reflecting mirror surface in the light emitting part such as an LED, sunlight having a higher brightness than the light emission brightness of the LED (including scattered light) Will also be reflected, further reducing the visibility.

  Next, wiring to the light emitter of the photovoltaic power generation apparatus having the above configuration will be described with reference to FIGS.

  First, the wiring to the light emitter 23 of the photovoltaic power generation system will be described with reference to FIG.

  In the figure, as shown in FIG. 13, the case where the photovoltaic power generation apparatus 2 of the present invention is arranged on the roof of a house 1a will be described.

  As described above, a plurality of light emitters are arranged in the solar cell module 15. However, it is unavoidable that the number of power supply lines to the light emitters is inevitably increased as the number of solar cell modules increases. As stated. Therefore, the power cable 5 that is the power line for the solar cell module that transmits the generated power from the original solar cell array 3 is also used as a lighting power line for the light emitter (electric path that supplies driving power to the heating element). By doing so, the aesthetics of the house are not spoiled with the reduction of members and construction as shown in FIG.

  Next, such wiring is shown in FIGS.

  First, the wiring of the present invention will be described with reference to FIGS.

  FIG. 1 is a main part wiring diagram showing lighting for a light emitter in each solar cell module. FIG. 2 is a main part wiring diagram showing an output of power generation in each solar cell module in the wiring of the solar power generation system of the present invention, and FIG. 3 is an individual solar cell in the wiring of the solar power generation system of the present invention. It is a principal part wiring diagram which shows lighting of the light-emitting body in a module.

  Description will be made with a configuration in which the light emitters 23 (23a to 23b) are arranged in the solar cell module 15 (15a to 15b).

  The negative side of the solar cell module 15a is connected to the anode side of the light emitter 23a, and the positive side of the solar cell module 15a is connected to the cathode side of the light emitter 23a.

  Similarly, the negative electrode side of the solar cell module 15b is connected to the anode side of the light emitter 23b, and the positive electrode side of the solar cell module 15b is connected to the cathode side of the light emitter 23b.

  First, the case where the light emitter 23 (23a to 23b) is turned on will be described with reference to FIGS.

  As shown in FIG. 2, when the solar cell module 15 (15 a, 15 b) generates power in the wiring in which the cathode side (− side) of the light emitter 23 is connected to the positive electrode side of the solar cell module 15, the solar cell module The power generated by 15a and the solar cell module 15b is not supplied to the light emitters 23a and 23b as shown by the arrows in the figure, and the light emitter 23 does not light up in the daytime.

  That is, according to the solar power generation device 2 shown in FIG. 12, a plurality of solar cell modules 15 are arranged to form the solar cell array 3, and a plurality of solar cell modules 15 are connected in series in the solar cell array 3. The string is made into one string, or two or more strings are collected.

  Then, the electric power generated by the solar cell array 3 is transmitted to the grid interconnection inverter (power conditioner) 7 through the power cable 5 and the connection box 6.

  The electric wires of the power cable 5 provided according to the number of strings are connected in parallel in the connection box 6 and a grid-connected inverter that converts the DC power generated by the solar cell array 3 into AC power. (Power conditioner) 7 is input and supplied to a general AC load or sold to a power company through grid connection.

  According to such wiring, the power cable 5 shown in FIG. 12 corresponds to the power cables 29 (29a to 29b) shown in FIG.

  When power generation is not performed in the evening, power is supplied from the outside as indicated by the arrow in FIG. 3, and the light emitter 23 is lit (flashes). At this time, electricity does not flow into the solar cell modules 15a and 15b.

  According to the present invention, the light emitter 23 can be lit (flashed) not only when the power generation situation such as evening or night is weak, but also in a bright atmosphere such as daytime.

  When the light emitters 23 (23a-23b) installed in the solar cell module 15 (15a-15b) are turned on, the commercial power system 27 is used. The commercial power system 27 is used for lighting the light emitters 23. It is electrically connected to a lighting control circuit 28 that supplies electric power. The lighting control circuit 28 is connected to the light emitter power line 26 and drawn into the connection box 6.

  Electric power is applied to the negative electrode side of the solar cell module 15a and the cathode side of the light emitter 23a through the light emitter power line 29 so that the light emitters 23 (23a to 23b) emit light.

  Specifically, AC power obtained from the commercial power system 27 is converted into DC power by the blinking control circuit 28, and the DC power output from the lighting control circuit 28 is a power cable that connects the connection box 6 and the power conditioner 7. The + pole is connected to 25a and the -pole is connected to the power line 25b.

  The DC power that has entered the connection box 6 through the power cable 25 a is then connected to the positive electrode side of the light emitter 23 in the terminal box 20 through the power cable 29 a that connects the connection box 6 and the solar cell module 15.

  The direct-current power that causes the luminous body 23 to emit light passes through the power line 29b from the negative pole side, the backflow preventing diode 31 that prevents the backflow of power from other solar cell modules, and the power line 25b, and the light emission control circuit (flashing control). Return to circuit 28.

  As described above, the power cable 29 between the connection box 6 and the solar cell module 15 and the power cable 25 between the connection box 6 and the power conditioner 7 can be shared, and the backflow prevention diode 31 is bypassed. This configuration does not require a diode.

  Therefore, most power transmission sections (the power cable 25 and the power cable 29) can be shared with the power cable, and the light emitter 23 can be turned on without installing a new power line.

  Even when the connection box 6 is arranged close to the solar cell module 15 or when the installation distance between the connection box 6 and the power conditioner 7 is long, the labor and members for routing the wiring to the roof are reduced. At the same time, the beauty of the house can be maintained.

  In addition, when the solar cell module 15 generates power, the light emitter 23 does not light in the daytime, so the life can be extended.

  In addition, by using the terminal box 20 as a terminal for taking out power from the light emitter 23, wiring can be easily performed without performing processing such as branching the power cable 29.

  Still another embodiment of the present invention is shown in FIG.

  As shown in the figure, a plurality of solar cell modules 15 (15a to 15d) are connected in series, and the light emitter 23 is similarly reversed in polarity between the solar cell module 15 and the light emitter 23 as described above. Arrange so that

  The DC power output from the lighting control circuit 28 connects the + pole to the power cable 25a and the-pole to the power line 25b. The DC power that has entered the connection box 6 through the power cable 25a then enters the solar cell module 15d through the power cable 29a and is connected to the positive electrode side of the light emitter 23.

  And the direct-current power which made the light-emitting body 23 light-emit comes out from the negative pole side, and similarly passes through solar cell module 15c, 15b, 15a sequentially, and finally passes through the power line 29b, the backflow prevention diode 31, and the power line 25b, and is light-emitted. Return to the control circuit 28.

  In this way, even when a plurality of solar cell modules 15 are connected in series, the power cable that carries the output power from the solar cell module can be used as it is.

  Further, since a plurality of the light emitters 23 can be connected in series, the supply voltage from the lighting control circuit 28 can be set high, and the voltage drop when converting from the commercial power system 27 to the direct current is reduced. Is effective.

  Furthermore, as shown in FIG. 12, by incorporating the lighting control circuit 28 in the power conditioner 7, the power line 26 can be minimized, and the finished outer diameter can be reduced to a grade having low weather resistance. Contributes to miniaturization of equipment. Moreover, since it is not necessary to connect and wire with the power cable 25, the construction becomes easy.

  According to the photovoltaic power generation system of the present invention, as described above, the power cable 29 (29a to 29b), which is the power line for the solar cell module, is formed as an electrical path for supplying power to the light emitter 23, thereby increasing the number of power lines. As a result, it was possible to reduce wiring members and construction work without impairing the aesthetics of the house.

  In this way, the aesthetics were improved and the wiring could be performed efficiently, thereby reducing the manufacturing cost.

  Furthermore, the stress of the electric wire with respect to a light-emitting body was made small, the joining force with a solar cell module was raised, and the reliability was able to be improved.

  Thus, according to the photovoltaic power generation system of the present invention, it is possible to supply power from the outside even during the daytime, thereby providing decorativeness even during the daytime, while also supplying power to the luminous body at night. I was able to.

  Next, another embodiment of the present invention will be described with reference to FIGS.

  According to the solar cell module 15 of the solar power generation apparatus described above, the light emitters 23 are disposed between the solar cell elements 16, the light emitters 23 are provided on the surface opposite to the light receiving surface, and these Although the light emitter 23 is made to emit light with the solar cell element 16 as the back surface, the arrangement portion of the light emitter 23 is not limited to this.

  For example, the arrangement shown in FIGS. 10 and 11 may be used. In these figures, the same parts as those shown in FIG.

  According to the solar cell module 15a shown in FIG. 10, a plurality of solar cell elements are arranged in a planar shape, and a light emitter 23 is arranged on the light receiving surface of each solar cell element between these solar cell elements. The light emitting body 23 is made to emit light with the solar cell element as the back surface.

  Further, according to the solar cell module 15 b shown in FIG. 11, a plurality of solar cell elements 16 are arranged in a planar shape, and a light emitter 23 is arranged in a gap 22 between these solar cell elements 16.

  Next, the failure detection technique of the present invention will be described with reference to FIGS.

  As shown in FIG. 16, a plurality of solar cell modules 15 (15a, 15b) are connected in series, and the light emitters 23 are arranged so that the polarities of the solar cell modules 15 and the light emitters 23 are opposite to each other.

  Thus, for example, when the solar cell module 15 (15a, 15b) normally generates power during the daytime, the generated power of the solar cell module 15a is applied to the negative side of the light emitter 23a. However, when the solar cell module 15a stops generating power due to a failure as shown in FIG. 17, the generated power of the solar cell module 15b flows into the + side of the light emitter 23a. 23a lights up.

  As described above, when the solar cell module 15 (15a, 15b) generates power, the light emitters 3a and 3b do not emit light. However, if any of the solar cell modules has an output failure, the remaining solar cell module that generates power is used. The generated power can illuminate the light-emitting body to notify the failure of the solar cell module, and thus, in addition to the functions of display and decoration, it can have the role of a failure display lamp.

  In addition, as described above with reference to FIG. 3, a failure can be detected even in the daytime with this system as long as power is supplied from the outside and the light emitter 23 is turned on.

  The present inventor will describe examples of solar power generation devices using solar cell modules in which a plurality of solar cell elements 16 are arranged in a matrix as in the above configuration in (Example 1) to (Example 4). . Examples of these are shown in FIGS.

  Further, an example of a solar power generation apparatus using a solar cell module 15e in which a plurality of solar cell elements 16 (16a to 16e) are arranged in a staggered manner will be described in (Example 5). An example of this is shown in FIG. Each of these figures is a front view of the photovoltaic power generation apparatus.

(Example 1)
This example is shown in FIG.

  In the figure, the photovoltaic power generation apparatus of the present invention is constituted by a single solar cell module 15a, and a plurality of letters and numbers are displayed in one solar cell module by a display method such as 7 segments.

  According to this solar power generation device (solar cell module 15 a), a plurality of solar cell elements 16 are arranged in a matrix, and the main body of the solar cell module 15 a is supported by the frame body 21.

  And the light-emitting body 23 is arranged in the clearance gap 22 between these solar cell elements 16, and it lights according to a required display.

  According to the solar cell module 15a of the solar power generation device having the above-described configuration, the light emitters 23 are arranged along the gaps 22 with respect to the lattice-like gaps 22 to display seven segments.

  FIG. 18 displays the date and time. The date “12th” is shown in the upper part of the solar cell module 15a, and the time “19:00” is shown in the lower part.

  In these notations, light emitters are arranged according to a display method such as 7 segments, and according to this example, light emission of the light emitters 23 is indicated by black dots.

  Note that the lattice-shaped gaps 22 show the light-emitting bodies 23 that are lit at these black dots, but in addition to these, the non-light-emitting light-emitting bodies 23 are arranged, but are not specified.

  Thus, according to the solar power generation device of the present invention, the brightness of the 7-segment display illuminant 23 is increased by disposing the non-light-emitting solar cell element 16 on the back side of the light emission. In particular, since the blue and dark blue solar cell elements 16 are arranged on the back side of the light emission, the luminance becomes remarkable even in the daytime.

  In addition, although it is set as the solar cell module which has the frame 21 in this example, it is good also as an attachment structure which abolishes a frame and is fixed to a support member with a fixed cover etc.

(Example 2)
This example is shown in FIG.

  According to the photovoltaic power generation apparatus shown in the figure, a plurality of solar cell modules 15b are arranged, and individual letters, numbers, alphabets, and the like are described with each solar cell module 15b.

  In this example, it is constituted by four solar cell modules 15b and expressed as “KOBE”.

  According to this solar power generation device, four solar cell modules 15b in which a plurality of solar cell elements 16 are arranged in a matrix are arranged, and each of the solar cell modules 15b has a light emitter corresponding to display characters. 23 placement sites are fixed.

  Thus, according to the solar power generation device of the present invention, the non-light-emitting solar cell element 16 is arranged on the back surface of the light emitting body 23 arranged corresponding to the display characters, thereby increasing the luminance. . In particular, since the blue and dark blue solar cell elements 16 are arranged on the back side of the light emission, the luminance becomes remarkable even in the daytime.

(Example 3)
This example is shown in FIG.

  According to the photovoltaic power generation apparatus shown in the figure, a plurality of solar cell modules 15c are arranged, and one letter, number, alphabet, etc. are written on these.

  In this example, a plurality of solar cell elements 16 are constituted by two solar cell modules 15c arranged in a matrix, and are expressed as “K”. In addition, the arrangement | positioning site | part of the light-emitting body 23 is fixed corresponding to the display character.

  Thus, according to the solar power generation device of the present invention, the non-light-emitting solar cell element 16 is arranged on the back surface of the light emitting body 23 arranged corresponding to the display characters, thereby increasing the luminance. . In particular, since the blue and dark blue solar cell elements 16 are arranged on the back side of the light emission, the luminance becomes remarkable even in the daytime.

  In the solar power generation device of this example, displaying one character across the plurality of solar cell modules 15c facilitates display of complicated Chinese characters and the like.

  Also, in this example, the frame body is eliminated and the mounting structure is fixed to the support member with a fixed cover or the like, but with this structure, characters of a plurality of solar cell modules can be seen continuously, and the text can be Suitable for making.

(Example 4)
In the solar power generation devices of (Example 1) to (Example 3) described above, a rectangular solar cell module is used, but instead of this, a solar power generation device using a triangular solar cell module is shown in FIG. Will be explained.

  According to the photovoltaic power generation apparatus shown in the figure, a plurality of solar cell elements 16 are arranged in a matrix for one triangular solar cell module 15d, and the solar cell is further provided with a frame 21. The main body of the module 15d is supported.

  In addition, in the same figure, the arrangement | positioning site | part of the light emitter 23 is abbreviated.

  Thus, according to the solar power generation device of the present invention, the non-light-emitting solar cell element 16 is disposed on the rear surface of the light emission with respect to the light-emitting body 23 having a display property and a decorative property. In particular, since the blue and dark blue solar cell elements 16 are arranged on the back side of the light emission, the luminance becomes remarkable even in the daytime.

  Moreover, in the solar power generation device of this example, by using the triangular solar cell module 15d, the display performance is improved, the decorativeness is improved, and it can be applied to various functions.

(Example 5)
In the solar power generation devices of (Example 1) to (Example 3) described above, a rectangular solar cell module was used. Instead, as shown in FIG. 22, a circular solar cell module 15e was manufactured. Further, a plurality of solar cell elements 16 are arranged in a staggered pattern, and the main body of the solar cell module 15 e is supported by the frame body 21.

  In addition, in the same figure, the arrangement | positioning site | part of the light emitter 23 is abbreviated.

  Thus, according to the solar power generation device of the present invention, the non-light-emitting solar cell element 16 is disposed on the rear surface of the light emission with respect to the light-emitting body 23 having a display property and a decorative property. In particular, since the blue and dark blue solar cell elements 16 are arranged on the back side of the light emission, the luminance becomes remarkable even in the daytime.

  Moreover, in the solar power generation device of this example, by using the circular solar cell module 15e, the display performance is improved, the decorativeness is improved, and it can be applied to various functions.

  In addition, according to the solar cell element used in the present invention, the luminance of the solar cell element 16 of blue or dark blue is arranged on the back surface of the light emission, so that the luminance becomes remarkable even in the daytime. Instead of the present invention, the present inventor has confirmed by experiment that even if solar cell elements exhibiting brown, red, amber, black, gray, green, gold, purple, magenta, etc. are used, the effects of the present invention can be obtained.

  It should be noted that the present invention is not limited to the above embodiment, and various modifications and improvements can be made without departing from the scope of the present invention.

  For example, in the solar power generation device of (Example 4), a triangular solar cell module is used, but it may be trapezoidal or polygonal instead.

  Further, in the solar power generation apparatus of (Example 5), the circular solar cell module is used, but it may be oval instead.

  Furthermore, in the solar power generation apparatuses of (Example 1) to (Example 4), the solar cell elements 16 are arranged in a matrix, but instead of this, they may be arranged in a staggered pattern, or (Example 5) In the solar power generation apparatus, the solar cell elements 16 are arranged in a staggered pattern, but may be arranged in a matrix instead. The arrangement of the photovoltaic power generation apparatus of (Example 7) may be similarly changed.

  Further, according to this example, a plurality of the light emitters 23 are connected in parallel, but instead of this, they may be connected in series, or the same effect can be obtained even if serial connection and parallel connection are mixed.

  Furthermore, although the power for lighting the light emitter is taken from the commercial power system 27, the power may be taken from a DC power source such as a battery or a fuel cell instead of the commercial power system.

It is a wiring diagram explaining the wiring to the light-emitting body of the solar power generation device which concerns on this invention. It is a wiring diagram explaining electric power generation in the solar power generation device concerning the present invention. It is a wiring diagram explaining light emission of a light-emitting body in the solar power generation device according to the present invention. It is a wiring diagram explaining the wiring to the light-emitting body of the solar power generation device which concerns on this invention. It is a wiring diagram explaining the wiring to the light-emitting body of the solar power generation device which concerns on a comparative example. It is a schematic sectional drawing which illustrates typically the solar cell module of the solar power generation device of this invention. It is a principal part enlarged view of the solar cell module which concerns on this invention. It is a front view which shows the area | region which can attach the light-emitting body in the solar cell module which concerns on this invention. In the solar cell module shown in FIG. 8, it is sectional drawing by cutting plane line AA. It is a schematic sectional drawing which illustrates other embodiment of the solar power generation device of this invention typically. It is a schematic sectional drawing which illustrates other embodiment of the solar power generation device of this invention typically. It is the perspective view which has arrange | positioned the solar power generation device of this invention on the roof of the house which concerns on the solar power generation system of this invention. It is the perspective view which has arrange | positioned the solar power generation device of this invention on the roof of the house which concerns on the conventional solar power generation system. It is a schematic sectional drawing of the solar cell module which concerns on the conventional solar power generation device. It is a schematic sectional drawing of the solar cell module which concerns on the other conventional solar power generation device. It is a wiring diagram explaining normal power generation in the solar power generation device according to the present invention. In the solar power generation device according to the present invention, it is a wiring diagram for explaining power generation in a failure state. It is a schematic front view of the solar cell module which concerns on the solar energy power generation system of this invention. It is a schematic front view of the solar cell module which concerns on the solar energy power generation system of this invention. It is a schematic front view of the solar cell module which concerns on the solar energy power generation system of this invention. It is a schematic front view of the solar cell module which concerns on the solar energy power generation system of this invention. It is a schematic front view of the solar cell module which concerns on the solar energy power generation system of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 15 ... Solar cell module 1a ... House 16 ... Solar cell element 23 ... Light emitter 26 ... Power line 6 for light emitter ... Connection box 31 ... Backflow prevention diode 32 ... Other backflow prevention diode 24... Power cable

Claims (7)

A solar power generation device including a solar cell module group in which a plurality of solar cell modules each including a light emitter are arranged, and the generated power generated by each solar cell module is generated with respect to the plurality of solar cell modules. The solar cell module power lines for power transmission are wired so that these solar cell modules are connected in series, and the positive electrode side of the light emitter applied power line that draws from the DC power source and supplies driving power to the light emitter is connected to the light emitter. A solar power generation system, characterized in that it is connected to the anode side and the positive side of the solar cell module power line is connected to the cathode side of the luminous body to detect a failure of the solar cell module. The solar power generation device includes a plurality of solar cell module power lines, and each solar cell module group is arranged corresponding to each solar cell module power line, and each of the solar cell module power lines has another The solar power generation system according to claim 1, wherein a backflow prevention diode is connected to the solar cell module group so as to prevent the generated power from backflowing. 3. The sunlight according to claim 1, wherein the backflow prevention diode is mounted on a junction box, and the power line for the solar cell module drawn out from the junction box is formed as an electric circuit for supplying power to the light emitter. Power generation system. The photovoltaic power generation system according to any one of claims 1 to 3, wherein the backflow prevention diode is connected to a system so as to backflow power through a power conditioner. The solar cell module according to any one of claims 1 to 4, wherein the solar cell module includes a plurality of solar cell elements arranged in a plane and a light emitter disposed between the solar cell elements. Photovoltaic system. The photovoltaic power generation system according to any one of claims 1 to 5, wherein the DC power source is obtained by converting AC power of a commercial power system into DC. The solar power generation system according to claim 1, wherein the light emitter is an LED.

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