JP2006278755A - Solar battery module and solar power generation system using same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a module which effectively suppresses a rise in temperature of a solar battery device to increase power generation efficiency, and to provide a solar power generation system which can suppress a spread of a fire breaking out in a house and a secondary disaster such as an electric shock by stopping the solar battery module from generating electric power when the fire breaks out in the house. <P>SOLUTION: The solar battery module is constituted by arranging a translucent substrate, the solar battery device, and a reverse-surface protecting material one over another. A gap connecting with the outside is provided between the translucent substrate and solar battery device. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a solar cell module having an air cooling structure and a solar power generation system using the solar cell module.

  In recent years, attention has been paid to new energy technology using natural energy as global environmental problems and energy conservation have increased. As one of them, interest in solar energy-based systems is high, and in particular, the spread of solar power generation devices to homes has been accelerated.

  A solar power generation device reduces the electric load of a home | home by converting solar energy into electric power and using it by the solar cell module which is the main component. In a house, since a solar cell module is often used on a roof of a house, various structures for mounting the solar cell module on the roof have been devised. The solar cell module used in this solar power generation system is installed on an existing installation surface represented by a residential roof, or a newly installed surface represented by a ground mount, a flat roof mount, or the like. Solar cell modules for installation on those installation surfaces generally have a structure in which a plurality of solar cell elements are connected in series and sandwiched between tempered glass, encapsulating resin, and a weather resistant film.

  FIG. 7 is a schematic cross-sectional view of a solar cell module according to a conventional solar power generation device.

  According to the solar cell module 40 shown in FIG. 7, reference numeral 20 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 20 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. This solar cell element is constituted by a crystalline solar cell such as single crystal or polycrystalline silicon, or a thin film solar cell.

  In such a solar cell module 40, a light transmission plate 21 such as a glass plate or a synthetic resin plate is disposed on the light receiving surface of the solar cell element 20, and a Teflon (registered trademark) film or PVF is disposed on the non-light receiving surface as the back surface. (Polyvinyl fluoride), PET (Polyethylene terephthalate) or other weather-resistant film 22 is attached, and between the light transmission plate 21 and the weather-resistant film 22, for example, EVA (ethylene-vinyl acetate copolymer resin) A transparent synthetic resin made of is used to form a filler 26. Then, the light transmitting plate 21, the solar cell element 20, and the weather resistant film 22 are attached to the rectangular main body so as to sandwich the frame 25 made of aluminum metal, SUS or the like around each side, The strength of the entire solar cell module 40 is increased. Further, a junction box 23 made of synthetic resin such as ABS resin or aluminum metal is bonded to the back surface of the solar cell module 40, that is, on the weather resistant film 22, and a terminal for taking out the output power of the solar cell module 40. It is made.

  FIG. 8 is a perspective view showing a state in which a plurality of solar cell modules are placed on the roof of a conventional house to obtain a solar power generation device.

  According to the solar power generation device J in which a plurality of solar cell modules 40 are mounted on the roof of a house shown in FIG. 8, a plurality of solar cell modules 40 are arranged to form a solar cell array. The generated power is transmitted to the power converter 36 through the power transmission cable 38 and the connection 37. More specifically, the electric power transmission cable 38 usually has a plurality of electric wires, and the electric wires of the electric power transmission cable 38 are connected in parallel by the connection box 37. Then, the DC power generated by the solar cell array is input to the power converter 36 that converts AC power into AC power, and supplied to a general AC load, or can be sold to a power company through grid connection. ing.

  In addition, the power conversion device of the solar power generation system performs DC-AC power conversion in order to supply the DC power of the solar cell to the commercial power system or the AC load. There are some which judge various information such as the situation, weather, and temperature in an integrated manner, provide high value-added information to users and make power conversion control more optimal.

  On the other hand, in the solar power generation system, the power generation efficiency decreases when the temperature of the solar cell module increases, and the power generation efficiency improves when the temperature decreases. Therefore, it is required to suppress the temperature rise of the solar cell module especially in summer, etc. In order to improve power generation efficiency, a passage for ventilation is provided on the back side of the solar cell module, or a forced water cooling mechanism using cooling water is provided. In order to reduce the temperature of the solar cell module.

Moreover, regarding the cooling of the solar cell module, a solar power generation system has been proposed in which a ventilation layer is provided on the back surface of the solar cell module, air is blown indoors, the temperature of the solar cell module is lowered, and the power generation efficiency is increased ( Patent Document 1).
Japanese Patent Laid-Open No. 9-235845

  However, in order to improve the ventilation of the back side of the solar cell module, it is necessary to install the solar cell module away from the roof surface of the house, which impairs the appearance of the house. In addition, it is easily affected by wind, and a strong fixing method that can resist wind loads such as typhoons is required, and the load on the roof surface is large.

  In addition, when a complicated mechanism such as a forced water cooling method is used, a cooling device is required separately from the solar power generation system, and construction for that is also required.

  By the way, in general, a power conversion device automatically operates when a solar cell module generates power. When a power failure occurs in a commercial power system of an electric power company, a reverse flow of generated power (a solar cell is installed). It has a function to stop the current from flowing back from the house and selling electricity to the power company). In this case, too, the power generated by the solar cell module travels inside and outside the house to the power converter. It remains entered. Therefore, for example, when a fire occurs in a house, the transmission line from the solar cell module that passed through the ceiling to the power conversion device is burned, and the generated power of the solar cell module in which carbonized building materials flow through the transmission line is short-circuited The fire spread is further expanded by sparks and heat generated by the generated power. In addition, there is a risk of secondary disasters such as electric shock due to the exposed core wire after the coating melts.

  In addition, in a normal solar power generation system, the solar power generation system itself is stopped by failure or manual stop even when the solar power generation system itself spreads fire and emits smoke or a fire is occurring in the house. Until then, power generation continues. Therefore, even if the power conversion device of the solar power generation system burns out and generates an abnormality, power is continuously supplied from the outside and new from electronic components such as semiconductor elements used in the power line and other parts. There is a possibility of igniting a secondary accident such as a fire or touching the power line to cause a secondary disaster.

  Then, the objective of the solar cell module of this invention is to suppress the temperature rise of a solar cell element effectively, and to raise electric power generation efficiency more.

  Another object of the solar cell module of the present invention is to detect when a fire occurs in a house.

  Moreover, the solar power generation system of this invention exists in suppressing the temperature rise of a solar cell element effectively, and improving a power generation efficiency more.

  Furthermore, the solar power generation system of the present invention is a solar power generation system that can stop the power generation of solar cells when a fire occurs in a house and suppress secondary disasters such as the promotion of fire spread of houses and electric shocks. It is to provide.

  The solar cell module of the present invention is a solar cell module formed by arranging a translucent substrate, a solar cell element, and a back surface protective material so as to overlap each other, and is between the translucent substrate and the solar cell element. It is characterized in that a gap connecting to the outside is provided.

  Moreover, the solar power generation system of this invention installs the solar cell module of Claim 1 in a roof, supplies the generated electric power of the said solar cell module to a load, or reversely flows into a commercial power system. An exhaust duct for room ventilation is connected to the gap between the solar cell modules.

  Furthermore, another solar power generation system of the present invention includes a detection unit capable of detecting a power generation state of the solar cell module between the solar cell module and the power conversion device, and the solar cell module and the power conversion device. A power generation output control device including a shut-off unit that can cut off the electrical connection and a control unit that controls the shut-off unit is provided.

  According to the solar cell module of the present invention, the solar cell module is formed by stacking the translucent substrate, the solar cell element, and the back surface protective material, the translucent substrate, the solar cell element, When the gap between the outside and the outside is provided, the low temperature air in the house is used for cooling the solar cell module, so that the power generation efficiency of the solar cell is improved and a fire occurs in a house etc. It is possible to detect this.

  Moreover, according to the solar cell system of the present invention, the solar cell module according to claim 1 is installed on the roof, and the power generated by the solar cell module is supplied to the load or is reversely flowed to the commercial power system. In the photovoltaic power generation system including the device, the above effect can be obtained by connecting an exhaust duct for indoor ventilation to the gap between the solar cell modules.

  Furthermore, according to another solar cell system of the present invention, a detection unit capable of detecting a power generation state of the solar cell module between the solar cell module and the power conversion device, the solar cell module and the power conversion device, By providing a power generation output control device equipped with a shut-off unit that can cut off the electrical connection of the unit and a control unit that controls the shut-off unit, when a fire occurs in a house, etc., it is detected and the fire spread by the generated power And secondary disasters such as electric shock can be prevented.

  In addition, even if an abnormality occurs on the power converter side due to a fire, the internal components of the power converter unit are damaged or burned out by the input of generated power by detecting the occurrence of a fire immediately and stopping the power transmission from the solar cell quickly. Can be prevented.

  In addition, since the solar cell module on the roofing material is less susceptible to fire in the event of a fire, the power generation is continued to prevent workers during digestion activities from receiving electric shock from the generated power, and secondary disasters caused by digestion activities Can be prevented.

  Hereinafter, an example of an embodiment of the present invention will be described in detail based on the drawings schematically shown. FIG. 1 is a cross-sectional view showing a structure of a solar cell module according to the present invention, and FIG. 2 is a cross-sectional view showing a state in which the solar cell module 1 is arranged on a roof of a house and the solar cell module 1 is cooled. It is.

  As shown in FIG. 1, a solar cell module 1 includes a plurality of solar cell elements 20 which are crystalline solar cells such as single crystal and polycrystalline silicon made of silicon or the like, or thin film solar cells, in series and in parallel. And is covered with a weather-resistant material so as to obtain a required output voltage or output current, and a glass plate or a synthetic resin is formed on the light receiving surface of the solar cell element 20. A light-transmitting material such as a plate or weather-resistant film 22 is arranged, and the non-light-receiving surface, which is the back surface thereof, is weather-resistant such as Teflon (registered trademark) film, PVF (polyvinyl fluoride), PET (polyethylene terephthalate), etc. A transparent synthetic resin made of, for example, EVA (ethylene-vinyl acetate copolymer resin) or the like is interposed between the weather resistant films 22 to form a filler 26. . In addition, although this example demonstrates using the structure which has arrange | positioned the weather-resistant film 22 with translucency on both surfaces of the solar cell element 20, it is the same even if the light-receiving surface side is glass. A junction box 23 made of synthetic resin such as ABS resin or aluminum metal is bonded to the weather-resistant film 22 on the back surface side of the solar cell element 20 to form a terminal for taking out the output power of the solar cell element 20. This is the power generation unit 27.

  Further, the light-receiving surface side weather-resistant film 22 of the power generation unit 27 may be omitted.

  A light passage plate 30 is provided on the light receiving surface side of the power generation unit 27 and a light transmission plate 21 is provided. The light transmission plate 21, the ventilation path 30, and the power generation unit 27 are stacked on a rectangular main body. The periphery of each side is mounted so as to sandwich a frame 25 made of aluminum metal, SUS, or the like, thereby increasing the strength of the entire solar cell module 1. Further, ventilation holes 10 (10a, 10b) for flowing air to the ventilation path 30 are opened on the side surface of the frame body 25 so that the air in the ventilation path 30 can be exchanged with the outside air. . The vent hole 10 (10a, 10b) may have a plurality of holes.

  As shown in FIG. 2, a fixed base 12 (12 a, 12 b) is attached on a roof material 41 that is a roof of a house, and the solar cell module 1 is placed between the fixed bases 12. The fixed frame 12 (12a, 12b) is provided with ventilation holes 9 (9a to 9c) connected to the ventilation openings 10 (10a, 10b) of the solar cell module 1, and the inside of the ventilation path 30 of the solar cell module 1 is provided. Air inflow and outflow are made possible. The solar cell module 1 is fixed to the fixed base 12 with screws 44 and nails using a fixed cover 43.

  On the other hand, an exhaust duct 11 for discharging the air in the room 45 to the outside is provided on the roof of the house, and the room temperature can be lowered by discharging the room air heated in the summer to the outdoors. . The exhaust duct 11 passes through the roof material 41 from the ceiling 46 and is connected to the fixed mount 12 (12a, 12b) so that indoor air flows through the fixed mount 12 to the ventilation holes 9 (9a, 9b). Yes. In this example, the exhaust duct 11 is provided with a ventilation fan 8 for forcibly exhausting the air in the room 45 so that the room can be ventilated in a shorter time than ventilation by natural convection. However, it is possible to use a system with low noise by using only natural convection without using a ventilation fan.

  By setting it as the above structures, it becomes possible to notify the cooling of a solar cell module and generation | occurrence | production of a fire. Specifically, the air heated in the room 45 as indicated by an arrow in the figure is exhausted to the outside through the exhaust duct 11 by the ventilation fan 8, passes through the fixed frame 12a installed outdoors, and enters the solar cell from the ventilation hole 9a. When the solar cell element is sent to the ventilation port 10a of the module 1b and passes through the ventilation channel 30, the solar cell element is cooled, and the ventilation cell 10b on the opposite side of the solar cell module 1b passes through the ventilation hole 9b of the fixed base 12b. Discharged. Air that has once exited into the fixed base 12b is similarly sent from the vent hole 9c to the vent hole 10c of the solar cell module 1c to cool the solar cell module 1c.

  In this example, the fixed mount 12 is used as a tubular pipe and also serves as a duct. However, a duct for connection may be used for each part, and a plurality of solar cell modules are mounted on the fixed mount. They may be arranged closely and the vents between the solar cell modules may be directly connected.

  FIG. 6 shows a solar power generation system using a plurality of the solar cell modules described above and arranged on the roof of a house. The air exhausted from the room 45 by the ventilation fan 8 as shown by the arrows in the drawing is sent to the plurality of solar cell modules 1 through the exhaust duct 11.

  At this time, for example, it is assumed that a small fire is generated in the room 45 and smoke 50 is generated. Since the smoke 50 is lighter than air, the smoke 50 flows into the solar cell modules 1 through the exhaust duct 11 and enters the solar cell modules 1 regardless of the operation / stop of the ventilation fan 8. As a result, the smoke 50 can be visually recognized from the outside as shown in the figure, and the occurrence of the fire is quickly identified. FIG. 3 shows the state of the solar cell module 1 at this time.

  According to FIG. 3, when the smoke 50 that has entered from the ventilation opening 10 a of the solar cell module 1 fills the ventilation path 30, it is visible from the outside of the light transmission plate 21 to become the smoke 50 from the solar cell element 20. It is easy to confirm the generation of smoke from the outside. In general, since the solar cell element 20 is mostly blue or black, if the smoke 50 generated at this time is white when burning wood or the like, it can be easily confirmed from a distance, but a chemical synthetic material such as petroleum burns. It is difficult to see with the black smoke that occurs. Therefore, if the weather-resistant film 22 on the non-light-receiving surface side of the solar cell element 20 is made a white bright color, when the white smoke is generated, the contrast with the solar cell element 20 causes the black smoke. It is preferable that the generation of smoke 50 can be reliably confirmed even from a distance by the contrast with the weather-resistant film 22 visible from the gap between the solar cell elements 20.

  As described above, the use of the indoor air cooling structure in the photovoltaic power generation system makes it possible to quickly notify the occurrence of an indoor fire.

  By the way, in the above-described residential solar power generation system of FIG. 6 or the like, the generated power from the solar cell module 1 is transmitted to the power conversion device 7 through the transmission line 38. In general, since the power conversion device 7 is often installed indoors, the power transmission line 38 is wired as an attic or a wall so as not to impair the appearance of the house. When such indoor wiring is performed, for example, if a fire occurs in the room 45 and the power transmission line 38 on the ceiling is burnt and short-circuited, the power generated by the solar cell module 1 is generated as a spark or heat at the short-circuited point. Consumed and further promotes the spread of fire. Further, if the fire burns down the electronic components of the power conversion device 7, the power conversion device 7 stops power transmission to the household load on the output side, but uses the power from the solar cell module 1 on the input side. It cannot be stopped, and a situation may occur in which the power generated by the solar cell module 1 burns out the circuit components on the input side that cannot move normally.

  Therefore, as shown in FIG. 4, the residential solar power generation system of the present invention uses the solar cell module 1 described above, and converts the solar cell module 1 and the generated power into a commercial power system 3 to a reverse power flow or a commercial AC load. A power generation output control device 2 is provided between the power conversion device 7 to be supplied, and the power generation output control device 2 includes an output detection unit 6, a blocking unit 4, and a control unit 5, and is detected by the output detection unit. When the solar cell output is in a predetermined condition, the control unit drives the blocking unit to cut off the generated power from the solar cell module 1.

  A specific control method will be described below in detail with reference to schematic diagrams.

  The solar power generation system S is a solar cell module cooling structure having the configuration described in FIG. 2, and converts the generated power of the solar cell module 1 (1a to 1c) into AC power as shown in FIG. A power converter 7 that reversely flows into the commercial power system 3 or supplies power to a commercial AC load such as a television or a refrigerator, and a fire placed between the solar cell module 1 (1a to 1c) and the power converter 7 It is comprised by the power generation output control apparatus 2 which interrupts | blocks an electric circuit so that the generated electric power of the solar cell module 1 (1a-1c) may not be transmitted to the transmission line 38 side at the time of generation | occurrence | production. The power generation output control device 2 includes an output detection unit 6 (6a to 6c) that detects a power generation state of each solar cell module 1, and a control unit 5 that detects the occurrence of a fire based on information obtained by the output detection unit 6. And a blocking unit 4 that blocks the electric circuit so that the power generation output of the solar cell module 1 is not transmitted to the power transmission line 38 by the signal of the control unit 5.

  A description will be given of control in which an electric circuit is cut off in the event of a fire. For example, when a fire occurs in the house as shown in FIG. 6 and the smoke 50 enters the solar cell module 1, the sunlight receiving surface of the solar cell module 1 is covered with the smoke 50 as shown in FIG. The generated power is significantly reduced by the fact that sunlight does not reach the solar cell element 20. Using this, the output detector 6 (6a to 6c) detects whether or not the generated power of the solar cell module 1 (1a to 1c) has decreased in the circuit configuration of FIG. Information about the situation is analyzed by the control unit 5. For example, in the configuration of the solar cell module of FIG. 6, the smoke 50 always causes an output decrease in order from the lowest solar cell module. Generally, when the power generation output decreases due to the shade of sunlight, As the power generation output decreases, the output current first decreases significantly and then the voltage decreases. However, in the case of power generation decrease due to smoke, the other solar cell modules will not decrease the power generation current. Therefore, a phenomenon occurs in which the generated voltage first decreases significantly, then the generated voltage gradually decreases, and finally the output current decreases. Therefore, if it is determined by the analysis in the control unit 5 that the change is caused by such a change, it can be determined that there is a high possibility of a fire. When the control unit 5 determines that a fire has occurred, the control unit 5 sends a signal to the contact unit such as a relay or breaker, or to the blocking unit 4 that is a semiconductor element such as a transistor or FET (field effect transistor), and the power transmission line 38. Break the electrical circuit to. In this way, even if a power transmission line or power converter is burned out by a fire, a highly safe photovoltaic power generation system that prevents the risk of electric shock without encouraging the fire with generated power Can do.

  Although not specifically shown in the above example, a bypass diode is generally used so that the output current of other solar cell modules connected in series does not decrease when the output of a part of the solar cell module decreases due to a shadow or the like. The bypass diode is based on the premise that the reduced output solar cell module is prevented from becoming a resistance component. Therefore, when the bypass diode is not used, advanced calculation may be performed based on the solar cell output characteristic curve (output voltage-current characteristic).

  If the analysis result calculated by the control unit 5 is used to drive the shut-off unit 4 and simultaneously issue a fire alarm, the occurrence of a fire in a room without a fire alarm can be notified.

  Further, if the control unit 5 can block not only the blocking unit 4 but also the transmission line (breaker etc.) on the indoor commercial power system side, both the generated power by the solar power generation and the power supply by the commercial power system are provided. It is also possible to make a safer disaster prevention mechanism without short circuit or electric shock.

  Next, another embodiment of the present invention will be described.

  As shown in FIG. 5, if the power generation output lines 35 of the solar cell modules 1 (1 a to 1 b) are combined into one and the output is detected by the output detection unit 6, the number of detection points is reduced and the number of parts is reduced. Can be reduced.

  Moreover, when the illuminance sensor 13 is provided in addition to the solar cell module 1 and the illuminance information is sent to the control unit 5, when the smoke enters the solar cell module 1 (1a to 1c) and the output is reduced, Whether the illuminance of light has decreased or a fire has occurred can be determined with higher accuracy. In this case, since it is not necessary to perform advanced calculations such as analyzing changes in the generated power of the solar cell module 1 by the control unit 5, it is not necessary to use a high-speed, large storage capacity CPU or the like. The control program can be simplified.

  Although not particularly illustrated, when the power conversion device 7 is a roof type or an attic installation type, the distance between the power transmission cable 38 and the power conversion device 7 is short and is not easily affected by a fire or the like. It is preferable that the device 2 is built in the power conversion device 7 so as to cut off the output on the indoor wiring 39 side where the wiring distance is relatively long.

  Although not shown in particular, in order to distinguish from the output drop due to the shadow of clouds or objects, the solar cell string using the solar cell module 1 is divided into some percent of the whole, and the solar cell using the solar cell module 1 is used. The generated power of the string is compared with the generated power of the solar cell string using a normal solar cell module that does not have a mechanism for allowing smoke to flow, and only the generated power of the solar cell string using the solar cell module 1 is compared. If it has decreased, it is judged that the output of the solar cell element has been reduced due to fire smoke, and if the power generated by both has decreased, power generation due to a decrease in illuminance or shadows of clouds or objects You may make it judge that electric power falls.

  Similarly, when installing a solar cell module across a building surface with a different orientation on the roof, such as a dormitory roof, the routing of the exhaust duct becomes complicated, so the solar cell module on any one of the building surfaces It is also possible to use the solar cell module 1 having a mechanism for allowing smoke to flow only into the solar power generation system and simplify the photovoltaic power generation system while maintaining the fire detection function.

  In addition, in the present invention, not only the power generation of the solar power generation system is stopped when a fire is detected, but also smoke can be seen around the surface of the solar cell module even from the outside at the time of the fire occurrence. Makes it easier for third parties to detect fires and contributes to early detection and handling of fires.

The present invention has been described by taking a residential solar power generation system as an example. However, the present invention is not limited to this, and any structure having indoor ventilation can be applied. It can also be used for power generation systems.

It is sectional drawing which illustrates the structure of the solar cell module which concerns on this invention typically. It is a schematic sectional drawing which shows a mode that the solar energy power generation system which concerns on this invention was installed on the roof. It is sectional drawing explaining a mode that smoke penetrates into the solar cell module which concerns on this invention. It is a schematic control block diagram which shows embodiment of the solar energy power generation system which concerns on this invention. It is a general | schematic control block diagram which shows embodiment of the other solar power generation system which concerns on this invention. It is a front view which arrange | positions the solar energy power generation system which concerns on this invention on the roof of a house, and demonstrates typically the flow of air or smoke. It is sectional drawing which illustrates the structure of the conventional solar cell module typically. It is a perspective view explaining the composition of the conventional residential photovoltaic power generation system typically.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a, 1b, 1c: Solar cell 2: Electric power generation output control device 3: Commercial power system 4: Blocking part 5: Control part 6a, 6b, 6c: Output detection part
7: Power conversion device 8: Ventilation fan 9: Ventilation holes 10, 10a to 10c: Ventilation port 11: Exhaust duct 12: Fixed mount 13: Illuminance sensor 20: Solar cell element 21: Light transmission plate 22: Weather resistant film 23: Junction box 25: Frame material 26: Filler material 27: Power generation unit 30: Ventilation path 35: Power generation output line 36: Power conversion device 37: Connection box 38: Power transmission cable 39: Indoor wiring 40: Solar cell module 41: Roof material 43 : Fixed cover 44: Screw 45: Indoor 46: Ceiling 50: Smoke J: Solar power generation system S: Solar power generation system

Claims (3)

A solar cell module comprising a light-transmitting substrate, a solar cell element, and a back surface protective material disposed so as to overlap each other, wherein a gap connected to the outside is provided between the light-transmitting substrate and the solar cell element. A solar cell module characterized by that. A solar power generation system comprising a power conversion device that is installed on the roof of the solar cell module according to claim 1 and supplies power generated by the solar cell module to a load or reversely flows to a commercial power system, A solar power generation system, wherein an exhaust duct for indoor ventilation is connected to a gap between the solar cell modules. A detecting unit capable of detecting a power generation state of the solar cell module between the solar cell module and the power converter, a blocking unit capable of blocking an electrical connection between the solar cell module and the power converter, and the blocking unit; The photovoltaic power generation system according to claim 2, further comprising a power generation output control device including a control unit for controlling.

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