JP2015015898A - Photovoltaic power generation panel or solar cell array with display means - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photovoltaic power generation apparatus capable of facilitating visible checking of an operation state thereof outdoors and, in the case of individual operation, enabling a user or a construction worker to easily check by sight a power generation state thereof outdoors, and capable of ensuring electrical safety in combination with an individual operation detection function of an inverter.SOLUTION: A photovoltaic power generation apparatus is configured so that operation display means with a light emitter displaying an operation state of a photovoltaic power generation panel composed of a plurality of connected solar cells is electrically connected with an output terminal of the photovoltaic power generation panel and is provided on or in the vicinity of the photovoltaic power generation panel to visually check a power generation state of the photovoltaic power generation panel.

Description

The present invention relates to a solar power generation device that generates power by irradiating sunlight and supplies power to a load circuit, and in particular, visually recognizes an operating state of a solar power generation panel or a solar cell itself that is a power generation source. The present invention relates to a photovoltaic power generation panel or a solar cell array having a function capable of performing.

Recently, installation of distributed power sources close to user loads is progressing in commercial facilities and houses. In particular, the photovoltaic power generation apparatus is spreading as a distributed power source that can be used in a wide range because there are few regional restrictions such as location conditions for power generation. Generally, a solar power generation device is used by being linked to a power system of commercial power supplied by an electric power company or the like.

The solar power generation apparatus includes a power conditioner including an inverter that converts DC power generated by the solar power generation panel into AC power. The obtained AC power is supplied to the user load. On the other hand, when power generation exceeding the power consumption of the user load is performed, the AC power is connected to the power system to which the photovoltaic power generator is connected and sold. Electricity. For example, as described in Patent Document 1, generated power or sold power is displayed on a display provided in the house, and the user can grasp the generated power or sold power. .

In the invention of Patent Document 1, the display means in the conventional photovoltaic power generation system only expresses the generated power, the accumulated power generation amount, etc. in numerical values or alphabets, and intuitively determines the power status in the house. In view of the fact that it was difficult to grasp, solar power having display means that can convey power information such as generated power to the user in a more easily understandable manner by displaying the generated power or the like in a bar graph or the like on a display. A power generation system is disclosed.

Patent Document 2 discloses a function of detecting an isolated operation in a solar power generation device. The inverter provided in the photovoltaic power generation apparatus has a function of controlling the AC output voltage of the inverter to a constant voltage by the included control circuit, that is, a function of suppressing a voltage increase, and a function of detecting an independent operation. .

The function for detecting the independent operation of the inverter is to stop the inverter when a system power failure occurs due to construction or the like while the output voltage of the inverter is connected to the power system. If the inverter remains in an operating state, the inverter output voltage is applied to the construction section of the power system due to the independent operation of the inverter, and there is a risk of electric shock to construction workers and the like. Therefore, the function of detecting the isolated operation is to detect a change in voltage due to the application of the output voltage of the inverter in the system power failure state and stop the inverter.

Regarding the detection function of the isolated operation, particularly when a plurality of private power generators are connected to the same pole transformer in the power system, whether or not this detection function works effectively is an important issue. In other words, if two private power generators are installed in the same area (called “bank”) where the pole transformer of the power system is the same, even if a system power failure occurs, When power is supplied, it may be difficult for the other inverter to detect a change in voltage due to the application of the output voltage and stop the inverter. Therefore, it is necessary to confirm in advance whether or not the function for detecting an isolated operation surely works between an existing private power generation device and a new private power generation device in the same bank. This confirmation work is often performed exclusively by electric power companies.

JP 2004-12376 A JP 2008-77369 A

In the photovoltaic power generation device, the generated power, the accumulated power generation amount, etc. are displayed on the display means in the house, so that the user can generate the generated power, the accumulated power generation amount, etc. of the solar power generation device used by the user at home. Power information can be grasped.
However, outdoors, it is not possible to easily grasp power information such as whether or not the solar power generation apparatus used by itself is operating and how much generated power is. This is because the display means of the solar power generation apparatus is installed in the house.

On the other hand, the inverter provided in the photovoltaic power generation apparatus has a function of controlling the AC output voltage of the inverter to a constant voltage by a control circuit included therein, that is, a function of suppressing voltage rise and a function of detecting an isolated operation. However, if two private power generators are installed in an area where the pole transformers of the power system are the same (referred to as “banks”), even if a system power failure occurs, When power is supplied to the system, it may be difficult for the other inverter to detect a change in voltage due to the application of the output voltage and stop the inverter. For this reason, it is necessary to confirm in advance whether the function to detect isolated operation will work reliably between the existing private power generator and the new private power generator in the same bank. Is often performed exclusively by electric power companies, which has led to an increase in labor and cost in installing the solar power generation device. In addition, when the inverter does not stop, there is a possibility that a construction worker or the like who performs the restoration work during a system power failure may receive an electric shock by mistake.

Thus, in the conventional solar power generation device, it cannot be easily grasped outdoors whether or not the solar power generation device is operating. In addition, it is impossible to grasp that the photovoltaic power generator is generating electricity immediately outside during single operation, and there is a risk of electric shock from construction workers etc. when the inverter is not stopped. . In addition, there is a problem that the labor and cost of installation increase.

Therefore, the present invention has been made in view of the above problems, and can easily visually recognize the operation status of a photovoltaic power generation panel or a solar cell array that supplies power to a photovoltaic power generation apparatus outdoors. During single operation, users, construction workers, etc. can easily check the power generation status of the solar power generation panel or solar cell array outdoors, and can ensure electrical safety in combination with the single operation detection function of the inverter. It aims at providing a solar power generation device.

The photovoltaic power generation panel according to the present invention is configured to solve the above-described problems, and is configured using a light emitter that displays an operation state of a photovoltaic power generation panel configured by connecting a plurality of photovoltaic cells. An operation display means and a notification means configured using a speaker for notifying the operation state of the solar power generation panel are provided in the solar power generation panel or in the vicinity of the solar power generation panel. During operation, the light emission of the light emitter can be visually recognized from the outside,
While it is possible to audibly grasp the notification from the speaker, it further includes a human sensor as an operation switch that is electrically connected to the operation display means and drives the operation display means. An operation display means is provided, wherein an output signal from the human sensor during power generation is input to the operation display means, whereby the operation display means is driven to display and notify an operation state. It is recommended to construct a solar power generation panel.

According to such a configuration, since the operation display means is provided in the solar power generation panel or in the vicinity of the solar power generation panel, by viewing the operation status of the solar power generation panel from where the solar power generation panel can be viewed such as outdoors, It is easy to determine whether the photovoltaic panel is operating. In addition, when operating alone, users and construction workers can easily understand the operation status of the photovoltaic panel outdoors, so a photovoltaic panel that helps prevent electric accidents such as electric shocks can be installed. Can be provided.

Moreover, it is good to comprise the solar cell array provided with the operation | movement display means characterized by comprising and connecting with a plurality of photovoltaic power generation panels, and displaying an operation state for every photovoltaic power generation panel.

According to such a configuration, since the operation display means is provided in the solar cell array or in the vicinity of the solar cell array, the solar cell array is obtained by visually recognizing the operation status of the solar cell array from where the solar cell array can be viewed such as outdoors. It can be determined whether or not it is operating. In addition, during single operation, users and construction workers can easily understand the operation status of the solar cell array outdoors, so that it is possible to provide a solar cell array useful for preventing electrical accidents such as electric shocks. .

In addition, since a human sensor is provided as an operation switch for driving the operation display means, the operation status can be grasped when necessary, and the generated power can be used efficiently without always displaying the generated power. Possible operation display means can be provided.

As described above, according to the present invention, since the operation state of the photovoltaic power generation panel or the solar cell array itself that is the power generation source can be easily visually recognized outdoors, the user can use the photovoltaic power generation panel or the solar cell array. It is possible to easily grasp whether or not is generating electricity. In addition, when operating alone, users and construction workers can easily check the power generation status of the photovoltaic power generation system outdoors. Can lead to ensuring electrical safety. It is possible to provide a solar power generation device that can ensure electrical safety in combination with the function for detecting an independent operation of an inverter.

The block diagram of the solar power generation device concerning a 1st embodiment is shown. 1 shows a solar cell panel according to a first embodiment. The solar cell array which concerns on 2nd Embodiment is shown. The other example of the solar cell array which concerns on the embodiment is shown. The block diagram of the photovoltaic cell concerning a 3rd embodiment is shown. The solar power generation device concerning a 4th embodiment is shown. The solar power generation device concerning the embodiment is shown. The solar power generation device which concerns on another example is shown. The solar cell array which concerns on another example is shown. The solar cell array which concerns on another example is shown. The solar cell array which concerns on another example is shown. The solar cell array which concerns on another example is shown. The solar cell array provided with the operation switch of another example is shown.

Next, an embodiment of the present invention will be described in detail with reference to FIGS.

(First embodiment)
(Overall picture of solar power generator)
FIG. 1 is a block configuration diagram showing an overall image of a photovoltaic power generation panel configured by using a photovoltaic power generation panel according to the present invention and a solar cell array configured by connecting a plurality of the photovoltaic power generation panels. 100 is a photovoltaic power generation panel, 101 is a power conditioner that converts DC power generated by the photovoltaic power generation panel into AC power, 200 is a commercial power source supplied from an electric power company, 300 is the solar cell panel and It is a distribution board which is supplied with electric power from the commercial power source and distributes electric power to a load circuit. The distribution board 300 includes a main switch 301 to which power is supplied from the commercial power supply and a main switch 302 to which power is supplied from the photovoltaic power generation panel. Power is supplied from these main switches. The branch switch 303 is provided.

(Structure of operation display means)
The operation display means provided in the vicinity of the solar power generation panel will be described with reference to FIG.
In FIG. 2, the operation display means 110 is provided on a part of the surface of the photovoltaic power generation panel 100.

The photovoltaic power generation panel 100 includes a plurality of connected solar battery cells 120. Each square in the figure represents a solar battery cell. In this embodiment, the operation display means 110 is provided on the surface of one solar battery cell. Further, the operation display means 110 is a light emitter formed using an LED, and is configured to obtain a power source by being electrically connected to a constant current circuit provided at an output terminal (electrode) of the photovoltaic power generation panel 100. .

According to such a configuration, when the solar power generation panel 100 generates power by irradiating with sunlight, power is supplied to the power conditioner 101 and power is also supplied to the LED that is the operation display means. Emits light.

For this reason, it is possible to visually recognize the operation status of the photovoltaic power generation panel from a place where the photovoltaic power generation panel can be seen such as outdoors, and it is easy to determine whether or not the photovoltaic power generation panel is operating.

(Second Embodiment)
FIG. 3 shows a solar cell array 120 configured by combining a plurality of the photovoltaic power generation panels 100. Each photovoltaic power generation panel 100 is electrically connected in series and parallel, and supplies generated power to the power conditioner 101 from an output terminal of the entire solar cell array.

Each of the photovoltaic power generation panels 100 is provided with the operation display means 110 described above, and the operation status of each photovoltaic power generation panel constituting the solar cell array can be confirmed. In the present embodiment, six solar power generation panels 100 are combined to form one solar cell array, and the operation status of the solar cell array can be grasped by a total of six operation display means 110. When all the operation display means are lit, it can be understood that the operation of each photovoltaic power generation panel is normal, and the other operation display means 110 is lit but the light is turned off. When there is an operation display means, it can be understood that some abnormality has occurred in the photovoltaic power generation panel with the operation display means turned off.

Further, when a circuit in which the current changes within the appropriate current range of the LED according to the output of the solar cell panel without using the constant current circuit described above, the brightness of all the operation display means is uniform. If so, it can be understood that the output of any photovoltaic power generation panel is equivalent, and if the brightness is lower than that of other operation display means, the power generation capacity of the photovoltaic power generation panel is reduced. I can grasp.

For this reason, it is possible to visually recognize the operation status of the photovoltaic power generation panel from where the photovoltaic power generation panel can be seen, such as outdoors, and whether the photovoltaic power generation panel is operating or not, the photovoltaic power generation panel constituting the solar cell array It is easy to determine whether the power generation state has changed each time.

FIG. 4 shows an example in which one operation display unit 110 is provided as the entire solar cell array 120 as another form of the second embodiment. In this case, the operation display means may be electrically connected to the output terminals of the entire solar cell array so as to obtain a power source for the operation display means, or the solar light constituting the solar cell array 120 Of the power generation panel 100, an operation display means may be electrically connected to an output terminal of the photovoltaic power generation panel at the lower left in the figure to obtain a power source for the operation display means.

In the embodiment described above, the connection between the output terminal of the photovoltaic power generation panel or the solar cell array and the operation display means may be performed by an electric wire or may be performed by using a connection bar.

(Third embodiment)
The third embodiment will be described with reference to FIG. In the third embodiment, instead of electrically connecting the operation display means to the output terminal of the photovoltaic power generation panel or the output terminal of the solar battery array, each electrode 121 formed in the solar battery cell 120 is used. And a solar power generation panel configured by sealing the substrate 103 with EVA (ethylene-vinyl acetate copolymer) 104 generally used as a resinous protective sealing material.

Specifically, each electrode provided in the solar battery cell is connected to the power supply line of the operation display means 113, and the solar battery cell 120 and the operation display means 113 are provided side by side on the substrate 103, and the EVA The solar battery cell 120 and the operation display means 113 are sealed with a sheet or the like, and the glass plate 104 on the front side and the substrate 103 are sandwiched and configured.

In the present embodiment, a photovoltaic power generation panel is formed in a state where the operation display means and the solar battery cell are sealed, and light emission of the operation display means can be visually recognized from the outside of the photovoltaic power generation panel or the solar battery array. Is. Since the EVA sheet has increased transparency and maintains translucency by heating at the time of sealing, the light emission of the light emitting body is visible from the outside.

In the figure, the operation display means 113 is formed with a light emitter, a constant current power source, and other circuits necessary for light emission. Note that one operation display unit 113 may be provided for a plurality of solar cells, and one operation display unit may be provided for the entire photovoltaic power generation panel. Similarly, a solar cell array having one operation display unit may be configured as a whole solar cell array by combining a solar power generation panel having an operation display unit and a solar power generation panel not having an operation display unit. The shape of the light emitter may be elongated according to the length of the solar battery cell, or may be simply formed in a dot shape. You may form so that the circumference | surroundings of the said photovoltaic cell may be enclosed as needed.

(Fourth embodiment)
The fourth embodiment is configured by further including an operation switch 140 for driving the operation display means 110 in the first to third embodiments.

FIG. 6 shows an external view of the present embodiment. The operation switch 140 is configured to be provided on a frame portion provided on the outer periphery of the photovoltaic power generation panel or the solar cell array. The frame portion 130 is an enclosure provided so as to cover the outer periphery of the photovoltaic power generation panel or solar cell array, and is often formed of metal to protect the periphery of the photovoltaic power generation panel or solar cell array from damage.

In order to electrically connect the operation display means and the operation switch, in the case of the first and second embodiments, an electric wire from the operation switch is provided so as to travel along the rear surface of the frame portion, and wiring is performed up to the operation display means. Good. Further, in the case of the third embodiment, an output terminal from the operation display means to the outside is provided in advance, and the output terminal is configured to be pulled out when sealed with the above-described EVA sheet. In addition, an electric wire from the operation switch may be provided so as to be transmitted along the rear surface of the frame portion, and wiring may be performed up to the output terminal of the operation display means.

When the operation switch 140 is operated, power is supplied to the operation display unit 110. When power is supplied, the operation display unit is lit / displayed.

Further, as shown in FIG. 7, in addition to providing the operation switch 140 on the frame portion, the operation switch 140 is pulled out and arranged from the solar power generation panel or the solar power generation panel. By performing wiring so as to be able to be performed, the operation switch 140 may be configured to be operated from the ground. As a result, the operating state can be confirmed even from a location other than the vicinity of the photovoltaic power generation panel or the solar cell array, and convenience is increased.

Further, the operation switch 140 and the operation display means 110 and 113 may be connected to each other by a wired connection to perform control, or a control signal may be exchanged wirelessly to perform display control from the operation switch. Specifically, a radio signal transmission / reception circuit is provided in the operation switch 140 and the operation display means 110, 113 so that a control signal generated by the operation of the operation switch 140 is transmitted to the operation display means 110, 113. It may be provided. The operation display means that receives the control signal from the operation switch causes the LED to emit light and displays the operation state. As a result, the signal line between the operation switch and the operation display means can be omitted, the workability is improved, the restrictions on the installation location of the operation switch are reduced, and the solar panel or solar panel is highly convenient. A battery array can be provided.
Moreover, you may comprise the operation switch mentioned above near the utility pole transformer which supplies a commercial power supply to the residence etc. in which the solar power generation device is provided. As a result, when the commercial power supply is interrupted and recovery work is performed, the operator can operate the operation switch from the utility pole so that the power generation status of the photovoltaic panel or solar cell array installed near the target can be seen from the utility pole. It is possible to alert an electric accident such as an electric shock.

Further, assuming that the operation display means is difficult to see from the utility pole, the operation switch may be provided with a display unit for displaying the photovoltaic power generation panel or the operation state of the photovoltaic power generation panel. Specifically, when the operation display means 110, 113 receives a control signal from the operation switch 140, it provides a response signal return unit that indicates whether or not the operation is being performed, and responds to the operation of the operation switch. Configure as follows. The operation switch that has received the response signal from the operation display means displays whether or not the operation switch is operating on the display unit. Thereby, the worker can confirm whether the nearby photovoltaic power generation panel or the solar cell array is in operation on the display unit of the operation switch at hand while staying on the utility pole.

In addition to the power supplied to the operation display unit 110 by operating the operation switch, the power is always supplied to the operation display unit 110, but the display is performed only when the operation switch 140 is operated. The operation display unit 110 may be configured as described above.

(Other examples)
As another example, an example in which a power generation state detection unit 102 that detects a power generation voltage or a power generation current of the solar power generation panel is provided in the vicinity of the solar power generation panel or the solar power generation panel will be described. FIG. 8 shows an overall configuration diagram of a block configuration diagram showing an overall image of the photovoltaic power generation apparatus.

The power generation state detection unit 102 is connected to an operation display unit, and the operation display unit receives a power generation state detection signal. More specifically, the operation display unit 111 in the present embodiment is configured using a liquid crystal display as the operation display unit 110 in the above-described embodiment, and is arranged on the surface of the solar battery cell. The figure which has arrange | positioned this liquid crystal display on the surface of the photovoltaic cell was shown in FIG.

The power generation state detection means 102 is provided in the electric circuit from the output line that outputs the generated power of the solar cell panel to the power conditioner 101, and is based on a current transformer (CT), a transformer (PT), or a power detection IC. It is composed. The current, voltage, and power information detected by the power generation state detection unit 102 is transmitted as a detection signal to the operation display unit 111 electrically connected to the power generation state detection unit.

In the present embodiment, since the operation display unit 111 is configured using a liquid crystal display, the operation display unit 111 includes a liquid crystal drive driver for controlling display on the liquid crystal display. Display control calculation means is provided.

The power generation state detection unit 102 and the operation display unit 111 may be configured to be connected by an electric wire, or by a PLC (power line carrier communication) using an electric path from the photovoltaic power generation panel to the power conditioner as a communication line. You may comprise so that the detection signal by the said electric power generation state detection means 102 may be transmitted to the said operation | movement display means 111. FIG. When the electric circuit is used as a communication line, the power generation state detection unit 102 and the operation display unit 111 are each provided with a power line carrier communication unit for performing communication by PLC that injects / reads a signal to / from the power line. Configure.

By configuring in this way, in addition to grasping the operation state of whether or not power generation is obtained by the above-described embodiment, how much voltage, current, or power is generated by the photovoltaic power generation panel or solar cell array It is possible to grasp the operational state of whether or not there is a more detailed numerical value.

If necessary, as shown in FIG. 10, the power generation state detection means 102 and the operation display means 111 may be provided for each photovoltaic power generation panel, as shown in FIG. As described above, the entire solar cell array may be configured by providing one power generation state detection unit and the operation display unit.

Further, when the operation display unit 111 is viewed from the outside, instead of displaying numerical values on the liquid crystal display so that the operation display unit 111 can be viewed not only from the vicinity of the liquid crystal display but also from a remote place, FIG. As described above, the operation display means is configured so that the display control arithmetic means displays the entire display in a single color such as white or red so that the photovoltaic power generation panel or the solar cell array is generating power. May be. In addition, as shown in FIG. 12, the operation display means may be configured so that the liquid crystal display displays a symbol such as a mark simulating the sun or a mark indicating power generation to make it known that power is being generated. Good. Also, as shown in FIG. 13, the operation display means and the operation switch may be electrically connected, and the liquid crystal display may be performed by operating the operation switch provided on the frame portion.

Further, as shown in the fourth embodiment, the wireless transmission / reception circuit is provided with the operation display means and the operation switch, and the current, voltage, and power information detected by the power generation state detection means 102 that can be grasped by the operation display means are operated. It is configured by transmitting to the switch, and the received current, voltage, and power information is displayed on the display section of the operation switch, so that the current, voltage, and power information is confirmed by the operation switch at hand. can do.

Further, a notification function by voice or electronic sound may be added to the operation display means so that the operation state can be audibly grasped. A speaker may be provided in the vicinity of the photovoltaic power generation panel, a storage unit may be provided in the operation display unit, and voice data and notification data may be stored, and voice and electronic sound may be notified to the surroundings. As a result, it is possible to inform the surroundings of the operating state such as “in operation” or “producing XX watts”, and to provide a solar power generation device that is easier to grasp the operating state in combination with visual display. it can.

Further, instead of the operation switch or in addition to the operation switch, a human sensor is provided, and an output signal from the human sensor is input to the operation display means, that is, display is performed. The operation display means may be configured to perform lighting or display on a liquid crystal display, and to perform operation display when an output signal from the human sensor is input. As a result, although the operation display is not performed at all times, the operation display is performed when the human sensor detects the person by approaching the human sensor, etc. It can be grasped appropriately.

DESCRIPTION OF SYMBOLS 100 Solar power generation panel 101 Power conditioner 102 Electric power generation state detection means 103 Board | substrate 104 Glass plate 200 Commercial power supply 110 Operation | movement display means 111 Operation | movement display means 113 Operation | movement display means 120 Solar cell 121 Electrode 130 Frame part 140 Operation switch 300 Distribution board 301 Main switch 302 Main switch 303 Branch switch

Claims (2)

An operation display means configured using a light emitting body for displaying an operation state of a photovoltaic power generation panel configured by connecting a plurality of solar cells;
Informing means configured using a speaker for informing the operating state of the photovoltaic power generation panel,
Provided in the vicinity of the solar power generation panel or the solar power generation panel,
During operation of the operation display means, the light emission of the light emitter can be visually recognized from the outside,
While making it possible to audibly grasp the notification from the speaker,
A human sensor is further provided as an operation switch electrically connected to the operation display means to drive the operation display means,
When the photovoltaic power generation panel generates power, an output signal from the human sensor is input to the operation display unit, so that the operation display unit is driven to display and notify the operation state. A photovoltaic power generation panel provided with operation display means.
A plurality of photovoltaic power generation panels according to claim 1 are connected and configured.
An operation state is displayed for each photovoltaic power generation panel.

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