JP5641518B2 - Solar power plant - Google Patents

Description

The present invention relates to a solar power generation apparatus that generates power by being irradiated with sunlight, and particularly relates to a solar power generation apparatus having a function of allowing a power generation state in the solar power generation apparatus to be visually recognized from the outside of a solar power generation panel.

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 connected to the solar power generation device 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.

Moreover, in patent document 2, when two or more photovoltaic power generation apparatuses are installed in the same bank, the weather in the same bank is almost the same, so the power generation amount of any power generation apparatus is the same. Transition. For this reason, even if the amount of power generated is clear enough, the reverse power flow in the same bank will increase, causing the voltage in the same bank to rise temporarily and it is not possible to sell power to the power company. Has also been shown to occur.

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.

As described above, in the conventional solar power generation apparatus, it is impossible to grasp whether or not the solar power generation apparatus is simply generating electric power outdoors at the time of single operation, and a construction worker or the like gets an electric shock. There was a problem that there was a danger and the labor and cost of installation increased.

Therefore, the present invention has been made in view of the above problems, and during single operation, a user, a construction worker, or the like can easily check the power generation status of the solar power generation apparatus outdoors, and the inverter It aims at providing the solar power generation device which can ensure electrical safety in combination with an independent operation detection function.

A solar battery according to the present invention is configured to solve the above-described problems, and a solar battery cell provided with a light transmittance varying means on the surface;
A solar cell module formed by connecting a plurality of the solar cells and variably driving the transmissivity of the translucency variable means;
A solar cell array formed by connecting a plurality of the solar cell modules;
Generated power detection means for detecting generated power generated by the solar cell array;
When it is detected that the power supply from the commercial power supply system is interrupted, and it is detected that the power supply from the commercial power supply system is interrupted, an isolated operation detecting means for outputting a commercial power system power failure detection signal; With
When the commercial power system power failure detection signal is received,
Based on the power data input from the generated power detection means,
Generating drive data of the light transmittance variable means suitable for the power data;
Concentrated control means for individually driving and controlling the light transmittance variable drive means of the light transmittance variable means provided for each of the electrically connected solar cells,
Character data, numeric data or symbol data corresponding to the detected power data is generated by individually driving and controlling the transmissivity variable driving means,
By using the entire solar cell module or the entire solar cell array as a dot matrix type information display means with a solar cell as a unit,
The character generator, the character data, or the symbol data may be displayed so as to be visible from the outside of the solar cell array.

According to such a configuration, when single operation is detected, the translucency variable means provided on the surface of the solar battery cell is variably driven, and the character data or numeric data corresponding to the detected power data is supplied to the solar battery. By displaying the module or the entire solar cell array so that it can be seen from the outside, the user or the construction worker can only look at the photovoltaic power generation panel, and the photovoltaic power generation device at his or her construction site can now generate power. Therefore, it is possible to provide a solar power generation device that can easily grasp that it is outdoors.

In addition, the isolated operation detection means according to the present invention,
Provided in a power system on the side of an electric power supplier that supplies the commercial power supply, detects that power supply in the power system has stopped, and outputs a cut-off signal for stopping power supply to another power system In response to the transfer cutoff signal output from the transfer cutoff signal transmitter provided in the commercial power system,
The solar power generation device according to claim 1, wherein the centralized control unit is configured to include a transfer cutoff signal receiving device that outputs a commercial power system power failure detection signal.

According to such a configuration, by using a transfer cut-off signal from the electric utility side as a trigger signal for the central control means, not only when a power failure occurs in the commercial power supply system, but also before a power failure occurs, etc. Thus, it is possible to provide a solar power generation apparatus that can recognize in advance that a power outage will occur in the vicinity of the solar power generation apparatus in cases where a power outage is likely to occur due to, or when construction is planned in the commercial power supply system.

Further, the central control means in the solar cell according to the present invention includes a storage unit for storing a unique identification ID, and the central control means is electrically connected to each of the light transmittance variable driving means. The solar cell module used in the solar cell array includes the translucency variable means for recognizing and driving the number of solar cells constituting the solar cell array by reading the identification ID from the storage unit 2. The solar data according to claim 1, wherein character data or numeric data corresponding to the power data detected by the generated power detection means is generated in accordance with the number of solar cells and the number of solar cells. A photovoltaic device may be configured.

According to such a configuration, by recognizing the number of solar cells in a solar cell array formed by combining a plurality of solar cells, character data or numeric data corresponding to the power data is set as the number of solar cells. If the photovoltaic panel is small, the power information is displayed small, and if the photovoltaic panel is large, the power information is displayed large to display character data or numbers. It is possible to provide a solar power generation apparatus that can easily grasp the data display and that does not require dot display setting in accordance with the size of the solar power generation panel to be combined on site, and that reduces the installation effort and cost.

As described above, according to the present invention, a user, a construction worker, or the like can easily check the power generation status of the photovoltaic power generation apparatus outdoors during the single operation, and can be combined with the single operation detection function of the inverter. Therefore, it is possible to provide a photovoltaic power generation apparatus that can reduce the risk of electric shocks to construction workers and the like, ensure electrical safety, and reduce labor and costs associated with installation.

The block diagram of the solar power generation device which concerns on this invention is shown. The block block diagram of the solar cell module which concerns on 1st embodiment is shown. The block block diagram of the solar cell array which concerns on the same embodiment is shown. Sectional drawing of the photovoltaic cell concerning the embodiment is shown. Sectional drawing of the translucency variable means which concerns on the same embodiment is shown. The state which carried out display control of the solar cell array concerning the embodiment is shown. The state which carried out display control of the solar cell array concerning the embodiment is shown. The state which carried out display control of the solar cell array concerning the embodiment is shown. The state which carried out display control of the solar cell array concerning the embodiment is shown. The block block diagram of the solar power generation device which concerns on 2nd embodiment is shown. The block block diagram of the solar power generation device which concerns on 3rd embodiment is shown. The state which carried out display control of the solar cell array concerning the embodiment 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 apparatus according to the present invention.
100 is a solar power generation panel, 102 is a power generation measuring means for measuring the power generated by the solar power generation panel 100, and 101 is a power for converting DC power generated by the solar power generation panel into AC power. Conditioner 200 is a commercial power source supplied from an electric power company, and 300 is a distribution board that is supplied with power from the solar cell panel and the commercial power source and distributes the 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 solar cell module)
Next, the structure details of the photovoltaic power generation panel will be described with reference to FIGS.
FIG. 2 is a block configuration diagram showing a solar cell module which is a component of the photovoltaic power generation panel according to the present invention.
110 is a solar cell module, and includes a plurality of connected solar cells 120. Each solar battery cell 120 is provided with a light transmittance variable means on the surface, and a light transmittance variable drive means 121 that variably drives the light transmittance of the light transmittance variable means. The light transmission variable driving means 121 changes the voltage applied to the light transmission variable means.
Further, the solar cell module 110 is provided with a central control means 122 that centrally drives and controls the plurality of light transmittance variable driving means 121, and the light transmittance variable driving means 121 is provided by a conductive portion 123. Each is connected to the central control means 122. The central control means may be constituted by a microcomputer provided with calculation means. The central control unit 122 is connected to the collector electrode in the solar cell module, and obtains a part of the generated power as a drive power source.

The conductive portion 123 extends to the four ends of the solar cell module. When a plurality of solar cell modules 110 are connected to form the solar cell array 130 as shown in FIG. 3, the conductive portions are connected to each other. It has become so. The solar cell array 130 obtained in this way is used as the photovoltaic power generation panel 100.

(Solar cell structure)
FIG. 4 is a block configuration diagram showing a cross section of the structure of the solar battery cell 120.
The solar battery cell 120 is configured to be formed in a layer on the conductive substrate 125, and the metal electrode layer 127, the semiconductor layer 126 bonded to the metal electrode layer 127, and the semiconductor layer 126 are bonded to each other. The transparent electrode layer 128 and the light transmittance variable layer 124 which is a light transmittance variable means joined to the transparent electrode layer 128 are sequentially formed in layers.

Further, on the conductive substrate 125, a light transmission variable driving means 121 for controlling the light transmission variable layer 124 is disposed. The light transmittance varying drive means 121 drives the light transmittance varying means by receiving the control signal transmitted from the central control means 122 through the conductive portion.

Here, the light transmittance variable layer 124 controls the magnitude of the light transmittance applied to the solar battery cell. In this embodiment, liquid crystal that changes the molecular orientation by applying a voltage is used. Is configured. The light transmittance variable layer is visually recognized as transparent when the light transmittance is large, and is opaque (substantially black because light is blocked) when the light transmittance is small.

(Structure of variable transmittance layer)
FIG. 5 is a schematic cross-sectional configuration diagram of the light transmittance variable layer 124. The light transmittance variable layer 124 is formed in layers on the transparent electrode layer 128. The light transmittance variable layer 124 includes a polarizing plate 1241 bonded to the transparent electrode layer 128, a transparent electrode layer 1242 bonded to the polarizing plate 1241, and two alignment layers 1243 bonded to the transparent electrode layer 1242. A liquid crystal layer 1245 sandwiched between 1244, a transparent electrode layer 1246 bonded to the liquid crystal layer 1245, and a polarizing plate 1247 bonded to the transparent electrode layer 1246 are formed in layers.

The transparent electrodes 1242 and 1246 in the light transmittance control layer 124 are electrically connected to the light transmittance variable driving means 121. In the liquid crystal 1245, the orientation of the liquid crystal 1245 is changed by controlling the application state of power from the transmissivity varying driving means 121, and the magnitude of the transmissivity is changed.

Since the central control means 122 can individually control the transmissivity varying drive means 121 to change the transmissivity in the transmissivity variable layer for each individual solar battery cell. The entire module can be controlled as a dot matrix type information display means with a unit of solar cell, and the change in light transmittance can be visually recognized on the solar cell module by treating it as a shade of visual color. Information can be displayed.

(Structure of solar cell array)
The solar cell array 130 is configured by combining a plurality of the solar cell modules 110 and supplies power to the load circuit. In the present invention, the solar cell module is controlled as a dot matrix type information display means. When a solar cell array is configured by combining the solar cell modules with each other, the entire solar cell array is displayed as a large information display means. Let me control as. In this case, since the desired information to be displayed can be displayed largely, visibility in the outdoors increases.

When the entire solar cell array is controlled as a large information display unit, the central control unit 122 provided for each solar cell module is linked with the conductive unit 123, and the conductive unit 123 is used as a power supply path. The entire solar cell array is controlled as a dot matrix display screen by using it as a signal communication path between the central control means.

When signal communication is performed using the conductive portion 123, a signal superimposing unit that superimposes a signal on the electric circuit is provided in the central control unit 122, and power line communication (PLC) may be used.

(Control of individual transmissivity variable drive means)
With respect to the central control means 122 provided for each solar cell module 110, by operating one central control means as a master unit and the other central control means as a slave unit, the light transmittance can be varied in the entire solar cell array. It is good to comprise so that a drive means may be controlled. That is, when the storage unit of the calculation unit of the central control unit 122 stores a predetermined program that operates as a master unit and a predetermined program that operates as a slave unit, and the central control units 122 communicate with each other, A step for setting an operation mode is provided. In this step, a signal including a signal (bit) for setting itself as a parent device is transmitted at a random time within a predetermined time, and a signal for setting as the parent device is received. The centralized control unit 122 sets itself as a slave unit, while setting the centralized control unit that has transmitted a signal to be set as a master unit at the earliest timing as a master unit. Whether the operation mode is a parent device or a child device is stored in the storage unit of the calculation means.

When the central control unit 122 operates as the master unit, it is necessary to grasp the number of transmissivity varying drive units 121 to be controlled and perform control as a dot matrix. Since the number of the solar battery cells 120 in the solar battery module 110 is determined when the solar battery module is manufactured, the arrangement information of the solar battery cells (n vertically and m horizontally (n and m are integers)) is arranged. Information) is stored in the central control means 122.

In addition, the central control unit 122 needs to know information on how many solar cell modules the solar cell array 130 is composed of vertically and horizontally. For this reason, the worker can arrange the arrangement information (N pieces in the vertical direction, M pieces in the horizontal direction (N and M are in the vertical direction) how many solar cell modules are combined in the stage where the construction of the solar cell module and the solar cell array is finished. (Integer) information that is arranged) is injected into the conductive portion 123 from the arrangement information transmitting means, and the central control means 122 receives the arrangement information, so that the solar cell module constituting the installed solar cell array Is stored in the storage unit of the central control means 122. Here, the arrangement information transmitting means is an input device including an input means for inputting the arrangement information and an injection section for injecting the inputted arrangement information through a connection portion with the conductive portion 123. Is a device operated by. Note that, like the RFID tag and its reader / writer, the central control unit 122 and the arrangement information transmission unit may be configured by including a transmission / reception unit that transmits and receives data wirelessly, and the arrangement information may be exchanged wirelessly.

The centralized control means 122 that operates as a master unit has the information that the number of the solar cell modules 110 constituting the solar cell array 130 is N pieces in the vertical direction and M pieces in the lateral direction, and the solar battery cells 120 that constitute the solar cell modules are vertically arranged. The entire solar cell array is controlled as one dot matrix type display device based on the information that the number is n and the number is m horizontally. That is, the display is controlled as a dot matrix type display device having N · n vertically and M · m horizontally. For example, when the solar cell module is composed of 6 solar cells in the vertical direction and 12 solar cells in the horizontal direction, and the solar cell array is configured by combining the two solar power generation modules vertically and 3 horizontally, The display is controlled as a dot matrix type display device having 12 vertical dots and 36 horizontal dots, 12 dots vertically by 36 dots horizontally.

(Power detection)
Now, a measuring means 102 for the generated power is provided on the output line for outputting the generated power of the solar cell array. A power conditioner 101 is provided on the way to the distribution board 300. The measuring means 102 is composed of a current transformer (CT), a transformer (PT), or a power detection IC, and transmits the detected power information as data to the central control means 122. The power information may be transmitted to the central control unit 122 through the PLC type input / output unit.

On the other hand, the power conditioner 101 is connected to an independent operation detection unit 1011 that detects that the power supply from the commercial power supply system 200 has stopped.

The islanding operation detection means used in a normal power conditioner is designed to stop the operation of the power conditioner so that the power output of the power conditioner is not applied to the commercial power system when the islanding operation is detected. Acts on na. The isolated operation detection means 1011 in this embodiment includes an output unit that outputs a commercial power system power failure detection signal to the outside when the isolated operation is detected. Are superimposed on the conductive portion and input to the central control means 122.

When the power conditioner 101 includes a power detection unit and an external output unit for the detected power information, the power information is input from the external output unit to the central control unit 122 via the PLC input / output unit. May be.

(Display power information)
When the central control unit 122 receives the commercial power system power failure detection signal, the power information input to the central control unit 122 is converted into value information of “kW”, which is a general unit of power, by the calculation unit. , Drive data for light transmittance variable means for displaying dot data of character data or numeric data as power value information on a dot matrix type display device of N · n vertically and M · m horizontally Is done. Note that these data processes are performed by a centralized control means that operates as a master unit.

Then, the central control means operating as the master unit creates the magnitude of the light transmittance by controlling each light transmittance variable driving means corresponding to the character data or the number data as the power value information. Control is performed so that the measured power value can be visually confirmed when the solar cell array is viewed from the outside.

In other words, when a power failure or the like occurs on the commercial power supply system 200 side and power supply from the commercial power supply system side is interrupted, The light transmission variable means is controlled by the central control means 122 to which the power system power failure detection signal is input, and the measured power value is displayed on the photovoltaic power generation panel so that it can be visually confirmed.

FIG. 6 is an example of a case where display of power information obtained by measurement is performed on the solar cell array 130. FIG. 6 shows a case where the solar cell array is a dot matrix type display device of 12 dots vertically and 36 dots horizontally as described above. By controlling the display in this way, it is possible to grasp the current generated power by glanced at the solar cell array from the outside, and the solar power generation device is independent even when the commercial power system is out of power. You can see at a glance that you are driving.

Further, as another display control method, as shown in FIG. 7, a part of the light transmittance variable means in the solar cell array blinks with time and is handled as symbol data, so that the photovoltaic power generator can generate power. It can be easily recognized from outside. In this case, the central control means 122 can control the transmissivity varying drive means so as to repeat the operation / stop. Similarly, one solar cell module is regarded as one dot, and the entire light transmittance variable driving means of the one solar cell module is controlled by blinking so as to repeat operation / stop simultaneously. Therefore, it can be easily recognized from the outside that the photovoltaic power generation apparatus is generating power.

Further, as another display control method, as a display control method that can be grasped more intuitively, as shown in FIG. 8, display is performed so that the positions of the black dots in the solar cell array move with time. By doing so, it can be recognized from the outside that the photovoltaic power generation apparatus is generating power.

Furthermore, as a display control method that can be grasped more intuitively, as shown in FIG. 9, the solar power generation apparatus is also generating power by displaying the characters “power generation” on the solar cell array. Can be recognized from the outside. In this case, the character data to be displayed may be stored in advance in the storage unit of the calculation unit of the central control unit 122.

(Second embodiment)
Next, a second embodiment will be described. In the second embodiment, the detection of the single operation performed by the single operation detection means on the power conditioner side in the first embodiment is performed on the electric utility side supplying commercial power.

In this embodiment, as shown in FIG. 11, the transfer cutoff signal receiving device 202 provided on the commercial power supply system 200 side receives the transfer cutoff signal output from the transfer cutoff signal transmitting device on the electric utility side, The commercial power system power failure detection signal is input to the central control means 122 from the transfer cutoff signal receiving apparatus 202 that has received the transfer cutoff signal, and the operation of the central control means 122 is started. These points will be described below.

Here, the transfer cut-off signal transmitter generally means that when a power failure or the like in the distribution system on the electric utility side is detected, the power generation apparatus in the distribution system provided downstream from the distribution system continues to operate. This is a device that outputs a signal for instructing to disconnect or stop the power generation device from the distribution system in order to prevent a single operation state (see paragraph No. 0021 of JP-A-2004-187442). The transfer interruption signal transmission device (transfer interruption device) is connected to the distribution system when it is determined by the monitoring means that monitors the operating state of the substation circuit breaker and the monitoring means that the substation circuit breaker is open. It comprises signal injection means for injecting a column command signal. And when the signal receiving means for receiving the disconnection command signal and the signal receiving means receive the disconnection command signal, the control means for disconnecting the power generator from the distribution system by performing an opening operation of the breaker for the power generator Thus, the breaker for the power generator is opened.

The transfer cut-off signal output from the transfer cut-off device is injected into the distribution system as a pulse signal having a predetermined frequency that can be distinguished from the commercial power supply frequency.

In addition to the configuration of the transfer cutoff device, the transfer cutoff signal transmission device 201 in the present invention detects that the power supply in the electric power system on the electric utility side has been stopped by the monitoring means, and is directed to another power system. A device provided with output means for outputting a cut-off signal for stopping power supply, and provided in a power system on the side of an electric power supplier that supplies commercial power.

Since the transfer cut-off signal transmitting device 201 is provided in the distribution system on the electric utility side, the transfer cut-off signal transmitting device 201 and the transfer cut-off signal receiving device 202 provided in the vicinity of the photovoltaic power generation device on the consumer side In general, the electric circuit 10 between them generally extends over a long distance. For this reason, similar to the above-described transfer cut-off device, as a method of injecting the cut-off signal output from the transfer cut-off signal transmission device 201 into the distribution system as a pulse signal having a predetermined frequency that can be distinguished from the commercial power supply frequency. It may be configured, but if it is assumed that each signal is attenuated while it is transmitted through the power distribution system due to the transfer route or relay transformer, etc. A communication line may be provided in parallel with the power distribution system to connect the transfer cutoff signal transmitter 201 and the transfer cutoff signal receiver 203.

In addition, since providing communication lines in all paths may increase costs, signal receiving means for connecting communication lines to a nearby power pole where the transfer interruption signal receiving device 202 is installed are provided. A signal injection means for injecting a signal into a short-distance power distribution system from the signal receiving means to the transfer cutoff signal receiving device 202 is provided, while a transfer cutoff signal receiving device 202 is provided with an injection signal receiving means to constitute a transfer cutoff. A configuration may be adopted in which a signal from the signal transmission device 201 is transmitted to the transfer cutoff signal reception device 202.

The transfer cut-off signal receiving device 202 in the present embodiment is provided with a receiving means for receiving a transfer cut-off signal output by the transfer cut-off device, interposed in the electric circuit 10 near the wire inlet in the distribution board 300 of the commercial power supply system 200. It is. When a transfer cut-off signal is received, a commercial power system power failure detection signal is output to the central control unit 122 by the PLC method. That is, the transfer cutoff signal from the electric utility side is used as a trigger signal for the operation of the central control means 122.

According to such a photovoltaic power generation device, by using a transfer cut-off signal from the electric utility side as a trigger signal for the operation of the central control means, of course, when a power failure occurs in the commercial power system, before the power failure Even if a power outage is likely to occur due to lightning, etc., or when construction is planned in the commercial power system, the electric power company issues a commercial power system power failure detection signal in advance. It is possible to provide a photovoltaic power generation apparatus that can recognize in advance that a power outage will occur in the vicinity of the apparatus, and that can effectively transmit information to people in an area where the power outage is planned.

When the storage unit of the centralized control unit 122 stores character data to be displayed in advance such as “Power failure will occur soon” or “Power transmission will stop due to lightning” and the transfer interruption signal is received, FIG. As shown in the above, it is preferable to operate to display these character data. FIG. 12 shows an example in which the characters “Soon”, “Power outage”, and “I will” are displayed while being shifted in time. When the number of solar cells (dots) is small, it is difficult to display a large amount of character information at a time, so that it is displayed in order for each predetermined character to be recognized by the surroundings. In addition, the program for controlling the transmissivity varying means in the central control means 122 may be changed so that the characters “soon to power out” are displayed so as to flow from right to left in the display space. By repeating such display for a predetermined time, a person in the vicinity of the photovoltaic power generation panel can recognize that a power failure will occur soon.

(Third embodiment)
Next, a third embodiment will be described. In the third embodiment, when the central control unit 122 recognizes the arrangement information of the solar cells and modules in the first and second embodiments, the arrangement information transmission unit manually recognizes the arrangement information. Instead, the central control means itself recognizes the arrangement information. This point will be described below.

In the case of the present embodiment, the transmissivity varying drive means 121 and the central control means 1221 constituting the solar cell module 110 in the first embodiment are provided with a storage unit for storing a unique identification ID, while FIG. As shown in FIG. 5, the central control means 1221 is arranged so as to straddle the conductive parts 1231 and 1232 provided in the vertical direction and the horizontal direction across the solar cell module, and the conductive parts 1231 and 1232 are provided in the central control means 1221. And a contact portion that is in contact with each other independently, and a signal is independently injected into each conductive portion or a signal is obtained from each conductive portion.

(Recognition of placement information)
When the solar cell array 130 is assembled by combining the solar cell modules 110, the central control means 1221 operates as follows when recognizing the arrangement information of the solar cells.

Note that the order in which the centralized control means that operates as the master unit is determined is the same as in the first embodiment.
When a voltage is applied to the central control unit 1221 after the combination, the central control unit 1221 first executes an operation step of grasping how many solar cell modules the solar cell array 110 is configured.

In this case, the central control unit 1221 outputs a detection signal for confirming the connection to the conductive portion 1232 provided in the lateral direction. The detection signal is transmitted to the solar cell modules arranged in the horizontal direction, and the central control means that has received the detection signal returns data including its own identification ID. The central control unit 1221 of the master unit that has received the returned data recognizes the number of identification IDs, thereby grasping the number of solar cell modules in the lateral direction.

Subsequently, the central control unit 1221 outputs a detection signal for confirming the connection to the conductive portion 1231 provided in the vertical direction. The detection signal is transmitted to the solar cell modules arranged in the vertical direction, and the central control means that has received the detection signal returns data including its own identification ID. The central control unit 1221 of the parent device that has received the returned data recognizes the number of identification IDs, thereby grasping the number of solar cell modules in the vertical direction.

Subsequently, as in the first embodiment, the central control unit 1221 that operates as a master unit includes the solar cell arrangement information (including n pieces in the vertical direction) stored in other central control units including its own central control unit 1221. , Information indicating that m (n and m are integers) are sequentially read out through the conductive portion, and the arithmetic means recognizes the arrangement and the number of transmissivity variable driving means constituting the solar cell array. .

As described above, the central control unit 1221 serving as a master unit recognizes the size of the solar cell array configured by combining the solar cell modules, so that the worker can assemble the solar cell array and then the arrangement information transmission unit. Thus, the trouble of setting the arrangement information can be reduced.

Also, the execution of the operation step for grasping how many solar cell modules the solar cell array 110 is configured is performed periodically or when the power supply to the central control unit is turned off. As a result of this programming, even when solar cell modules are added or removed in the future, the arrangement information of solar cells can be automatically recognized, and the power information can be displayed in a size suitable for each occasion. Yes.

In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

For example, in the first embodiment, an example in which liquid crystal is used for the light transmittance varying unit 124 is shown. This liquid crystal has been described on the assumption that the molecular orientation changes with the application of voltage. However, in order to reduce the driving power in the light transmission variable driving means 121 and to save power, for example, the application of voltage is applied. A ferroelectric liquid crystal having a memory effect that maintains the alignment state of the liquid crystal even when the switch is turned off may be used. This eliminates the need to always apply a voltage. In the case of changing the light transmittance, it is possible to change the light transmittance by applying a voltage for a short time.

In addition, although the PLC system is shown as the signal communication system in the centralized control unit and the transmission system of the power information detected by the generated power measuring unit, a signal communication line is provided separately for signal communication. Also good.

In addition to the display of character information and the like as described above, a speaker is provided in the vicinity of the photovoltaic power generation panel, and voice data and alarm data are stored in the storage unit in the central control unit 122, as described above. When isolated operation is detected, voice data or alarm data may be notified to the surroundings. Accordingly, it is possible to provide a solar power generation device that can transmit events such as “power outage” and “soon power outage” to the surroundings.

DESCRIPTION OF SYMBOLS 100 Photovoltaic power generation panel 101 Power conditioner 102 Generated power measuring means 200 Commercial power supply 110 Solar cell module 120 Solar cell 121 Transmissivity variable drive means 122 Concentration control means 1221 Concentration control means 123 Conductive part 1231 Conductive part 1232 Conductive part 124 Transmissivity variable layer 125 Conductive substrate 126 Semiconductor layer 127 Metal electrode layer 128 Transparent electrode layer 1241 Polarizing plate 1242 Transparent electrode 1246 Transparent electrode 1243 Alignment layer 1244 Alignment layer 1245 Liquid crystal layer 130 Solar cell array 300 Distribution board 301 Main switch 302 Main switch 303 Branch switch

Claims (3)

A solar battery cell having a light transmittance variable means on its surface;
A solar cell module formed by connecting a plurality of the solar cells and variably driving the transmissivity of the translucency variable means;
A solar cell array formed by connecting a plurality of the solar cell modules;
Generated power detection means for detecting generated power generated by the solar cell array;
When it is detected that the power supply from the commercial power supply system is interrupted, and it is detected that the power supply from the commercial power supply system is interrupted, an isolated operation detecting means for outputting a commercial power system power failure detection signal; With
When the commercial power system power failure detection signal is received,
Based on the power data input from the generated power detection means,
Generating drive data of the light transmittance variable means suitable for the power data;
Concentrated control means for individually driving and controlling the light transmittance variable drive means of the light transmittance variable means provided for each of the electrically connected solar cells,
Character data, numeric data or symbol data corresponding to the detected power data is generated by individually driving and controlling the transmissivity variable driving means,
By using the entire solar cell module or the entire solar cell array as a dot matrix type information display means with a solar cell as a unit,
A solar power generation apparatus, wherein the character data, number data, or symbol data is displayed so as to be visible from the outside of the solar cell array.
The isolated operation detecting means includes
Provided in a power system on the side of an electric power supplier that supplies the commercial power supply, detects that power supply in the power system has stopped, and outputs a cut-off signal for stopping power supply to another power system In response to the transfer cutoff signal output from the transfer cutoff signal transmitter provided in the commercial power system,
The photovoltaic power generation apparatus according to claim 1, further comprising a transfer cutoff signal receiving device that outputs a commercial power system power failure detection signal to the central control means.
The central control means includes a storage unit for storing a unique identification ID,
The centralized control means reads out the identification ID from the storage unit of each of the electrically connected variable transmittance driving means,
Recognizing the number of solar cells constituting the solar cell array,
The light transmission variable means for driving control is changed according to the number of solar cell modules used in the solar cell array, and the number of solar cells,
The photovoltaic power generation apparatus according to claim 1 or 2, wherein character data or numeric data corresponding to the power data detected by the generated power detection means is generated.

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