JP6343263B2 - Solar power system - Google Patents

Description

  The present invention relates to a solar power generation system that generates power using solar energy, and more particularly to a solar power generation system including a display device that displays an amount of electric power.

  In the photovoltaic power generation system, the power generated by the solar panel (solar cell module) is converted into commercial alternating current by a power conditioner device (PCS) and consumed in the home or returned to the commercial system to sell power (reverse power flow) ). Specifically, a solar cell module unit, a power conditioner device having a function of converting a direct current output from the solar cell module into an alternating current output, a power conditioner device and a system from an electric power company are connected, and a home It is a power generation system provided with a distribution board for connecting a domestic load, which is an electric appliance, a power conditioner device, and a system from an electric power company.

  In such a solar power generation system, a display device is provided for notifying residents of power information such as the amount of generated power in the solar cell module, the amount of power sold to the power company, and the amount of power consumed in the home. For example, in Japanese Patent Laid-Open No. 2014-11863 (Patent Document 1), a detection sensor and a detection device can be added as necessary, and a display device can be installed in a home according to the addition of the detection device. A solar power generation system that can display and check the power consumption of each system has been proposed. According to this, it is possible to easily expand the electrical equipment divided for each system in the home even if the number of system facilities to be monitored increases, and how much electricity is consumed at which location. It can be displayed clearly.

JP 2014-11863 A

  By the way, in a resident of a house equipped with such a solar power generation system, there are many requests to confirm power information such as the amount of generated power and the amount of purchased and sold power of the solar power generation system while comparing with past power information. is there. For this reason, the display device needs to be able to display power information in units of periods such as “daily units”, “week units”, and “month units” in the past. As a result, the resident can easily grasp the amount of generated power and the amount of purchased and sold power, and can efficiently operate the solar power generation system.

  In a display device having such a function, a display instruction button for displaying power information in units of periods such as past “daily units”, “weekly units”, “monthly units” is required. It is difficult to provide all of these individual display instruction buttons because of the demand for downsizing the display device. Therefore, there is a demand for a display device that can display power information in a plurality of period units such as “daily units”, “week units”, “month units”, etc. with one display instruction button.

  In addition, if you want to check power information in units of periods such as “weekly” or “monthly” retroactively, or if you want to check power information on a specific day in the past, you should quickly aim There is a need for a display device that is easy to use and that allows browsing of power information by period or date.

  An object of the present invention is to provide a novel solar power generation system including an easy-to-use display device that can reduce the number of display instruction buttons and can quickly browse power information of a target period unit or date and time.

  The present invention is a solar cell module that generates power using solar energy, a power conditioner device that converts electricity generated by the solar cell module from direct current to alternating current, and converted into alternating current by the power conditioner device. A distribution board for distributing electricity, and a display device for displaying power information sent from the distribution board, the display device comprises display instruction means for displaying power information, At least when the operation time of the display instruction by the display instruction means is short, the power information of the first period unit is displayed, and when the operation time of the display instruction is long, the power of the second period unit longer than the first period unit. The information is displayed, and the displayed power information is updated and displayed in time series in correspondence with the operation time.

  According to the present invention, power information in different period units can be displayed by one display instruction means, and the power information can be updated and displayed in time series in different period units corresponding to the operation time. As a result, the number of display instruction means can be reduced, and an easy-to-use display that allows the user to quickly view the power information of the target period unit and date / time can be performed.

It is a block diagram which shows the system configuration | structure of the solar energy power generation system to which this invention is applied. It is an external appearance structure which shows the external appearance of a display apparatus. It is a block diagram which shows the internal structure of the display apparatus shown in FIG. It is an operation | movement flow which becomes typical embodiment of this invention, and is a figure which shows the first half part of the operation | movement flow explaining the display operation | movement at the time of performing display of electric power information. It is an operation | movement flow which becomes typical embodiment of this invention, and is a figure which shows the intermediate part of the operation | movement flow explaining the display operation | movement at the time of performing display of electric power information. It is an operation | movement flow which becomes typical embodiment of this invention, and is a figure which shows the second half part of the operation | movement flow explaining the display operation | movement at the time of performing display of electric power information. It is a figure which shows the relationship between the operation time of a display instruction | indication button, and the displayed power information. It is a figure which shows the display screen on which the electric power information of "daily unit" was displayed in the display apparatus. It is a figure which shows the display screen on which the electric power information of "weekly" in a display apparatus was displayed. It is a figure which shows the display screen on which the electric power information of "monthly" in a display apparatus was displayed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is also included in the range.

  First, before describing a specific embodiment of the present invention, a configuration of a photovoltaic power generation system will be briefly described with reference to FIGS. 1 to 3.

  FIG. 1 is a block diagram showing a system configuration of the photovoltaic power generation system 100. The solar power generation system 100 includes a solar cell module 101, a booster device 102, a connection box 103, a power conditioner device 110, a distribution board 120, and a display device 130. In the present embodiment, the solar power generation system 100 will be described as being provided in a home for general homes and supplying power consumed by electrical devices in the home.

  The solar cell module 101 is provided on a roof of a house or the like, and generates power using sunlight energy. In the illustrated example, there are two systems in which four solar cell modules 101 are connected in series, and one system in which three solar cell modules 101 are connected in series. Since the system composed of the three solar cell modules 101 has a lower generated power voltage than the system composed of the four solar cell modules 101, the voltage is boosted by the booster 102 to adjust the voltage. A system consisting of these solar cell modules 101 connected in series is connected in a junction box 103.

  The power conditioner device 110 has a function of converting electricity generated by the solar cell module 101 from direct current to alternating current. The power conditioner device 110 is installed outside or indoors in a house where the photovoltaic power generation system 100 is installed, and converts the electricity generated by the solar cell module 101 from direct current to alternating current using an inverter device. The power conditioner device 110 has an error code display unit 111 that displays an error code when an error occurs in the photovoltaic power generation system 100. The presence or absence of an error such as excess or deficiency in voltage or communication abnormality is diagnosed by the power conditioner device 110.

  The distribution board 120 has a function of distributing electricity converted to alternating current by the power conditioner device 110. More specifically, the distribution board 120 divides the electricity generated by the solar cell module 101 into the amount consumed by household electrical equipment and the amount sent to the commercial power system for power sale. In addition, distribution board 120 receives supply of electric power from the commercial power system (purchasing power) when the electric power consumed by the electric devices in the home cannot be supplied by the electric power generated by solar cell module 101, and Send to electrical equipment.

  The distribution board 120 incorporates a voltage sensor 121 and a current sensor 122. The voltage sensor 121 measures the voltage value of electricity divided by the distribution board 120. The current sensor 122 measures the current value of electricity divided by the distribution board 120.

  Further, although not shown in the figure, the distribution board 120 is provided with an arithmetic processing unit composed of a microcomputer or the like, and the amount of electric power sold or purchased from the detected voltage or current, The amount of power consumed by the electrical equipment, the amount of power generated from the power conditioner device 110, and the like are calculated and obtained.

  In FIG. 1, the voltage sensor 121 and the current sensor 122 are incorporated in the distribution board 120, but the voltage sensor 121 and the current sensor 122 may be provided separately from the distribution board 120.

  The display device (display device for the photovoltaic power generation system) 130 displays the current operation status such as the voltage value and current value measured by the voltage sensor 121 and the current sensor 122, the amount of electric power purchased and sold, the amount of power consumption, and the amount of generated power. indicate. In addition to these, the self-sufficiency rate, the CO2 reduction amount, the oil reduction amount, and additional information of the power conditioner device 110 can be displayed as necessary. The display device 130 is communicably connected to the distribution board 120 and receives various types of information including the power information described above by wireless communication.

  FIG. 2 shows an example of the appearance of the display device 130, and FIG. 3 is an explanatory diagram showing an example of its internal configuration. As shown in FIG. 2, the display device 130 is a small color monitor device having a liquid crystal screen 131, and is placed, for example, in a living room of a house where the solar power generation system 100 is installed.

  As described above, the display device 130 includes the current and past power generation amounts in the solar cell module 101 and the current and past power consumption and power purchase amounts consumed in the home out of the power generated by the solar cell module 101. Of the power generated by the solar cell module 101, power information such as the current and past power sales amount to be sold to the power company is displayed. Such information may be displayed as a bar graph or a line graph in time series.

  It also displays information on each day's, weekly, and monthly units, such as the amount of generated power, the amount of power consumed, and the amount of electricity purchased and sold, as well as information about their transitions and the approximate value of the electricity bill to be bought and sold. It can be displayed by operating the instruction button 131g. Here, “daily unit” is a unit of one day, “weekly unit” is a unit of 7 days, and “monthly unit” is a unit of period of 30 days.

  The various types of information described above are stored while being added or updated in an auxiliary storage device described later. Therefore, the auxiliary storage device uses a flash memory that is a readable / writable storage element, a backup RAM backed up by a power source, or the like. Of course, other storage elements may be used.

  The liquid crystal screen 131 of the display device 130 is provided with a touch panel (touch key) which is a display instruction button 131g, and desired information can be displayed by operating the display instruction button 131g by a user (resident). is there. As will be described later, the display instruction button 131g serves as a display instruction input unit that receives an input of a power information display instruction from the user.

  In addition to the display instruction button 131g formed of a touch panel, a display for accepting an input of a power information display instruction from the user by a display instruction button 132 by a push button provided on the lower side of the liquid crystal screen 131 as indicated by a broken line. It is also possible to configure instruction input means. By providing such a display device 130, the user can easily grasp the operating state of the photovoltaic power generation system 100.

  As shown in FIG. 3, in this embodiment, the display device 130 includes a CPU (processing unit) 130a, a main storage device 130b, an auxiliary storage device 130c, a wireless communication circuit 130d, an input / output I / F 130e, and an LCD (display unit) 130f. And a display instruction button 131g. The liquid crystal screen 131 includes an LCD 130f and a display instruction button 131g. It is also possible to accept an input from the display instruction button 132, and the display instruction from the display instruction button 132 is input to the input / output I / F 130e.

  The main storage device 130b includes a database 130b3 that stores various data in addition to an OS (Operating System) 130b1 and a control program 130b2. The control program 130b2 is an application program that enables the user to easily grasp the operating state of the photovoltaic power generation system 100 (the state of power generation, power sale, power purchase, etc.), and the user can display the display instruction button 131g. The contents of the power information can be easily grasped through the network. And CPU130a can perform the display function shown in Drawing 4A-Drawing 4C explained below by control program 130b.

  The wireless communication circuit 130d is a circuit that wirelessly receives various information such as the measured values of the voltage sensor 121 and the current sensor 122 built in the distribution board 120, the amount of generated power, the amount of power consumed, and the amount of purchased and sold power. . The input / output I / F 130e has a function of receiving an input of a display instruction from the display instruction button 131g or the display instruction button 132 and transmitting an output of various display information to the LCD 131f. Further, the LCD 131f is a display unit having a resolution capable of displaying at least one or more of the various power information described above.

  In the present embodiment, at least the amount of power generated by the solar cell module 101, the amount of power consumed at home, the amount of power purchased from the power company, and the power information of the amount of power sold to the power company are displayed. ing. And these electric power information is expressed by the bar graph and the line graph. Of course, even if it is not such a graph, it can be expressed numerically.

  In the photovoltaic power generation system having the above-described configuration, as described above, the display instruction button for displaying each of the past “daily unit”, “week unit”, and “month unit” power information on the display device 130. However, it is difficult to provide all of these individual display instruction buttons on the display device 130 due to a demand for downsizing the display device 130. Therefore, it is required to display power information in units of periods such as past “daily units”, “week units”, “month units”, etc. with one display instruction button.

  In addition, when you want to check the power information of “weekly” or “monthly” retroactively or when you want to check the power information of a specific day in the past, you can quickly check the target period unit or date / time. An easy-to-use display method that can browse the power information is required.

  In order to solve such a problem, in this embodiment, when the operation time of the display instruction by the display instruction means is short, the power information of the first period unit is displayed, and when the operation time of the display instruction is long A configuration is proposed in which power information in a second period unit that is longer than the first period unit is displayed, and the displayed power information is updated and displayed in time series corresponding to the operation time. is there. In this embodiment, the first period unit is “day unit”, and the second period unit is “week unit”. Furthermore, a third period unit may be set to “monthly unit”.

  According to this, power information in different period units can be displayed by one display instruction means, and the power information can be updated and displayed in time series in different time periods corresponding to the operation time. As a result, the number of display instruction means can be reduced, and an easy-to-use display that allows the user to quickly view the power information of the target period unit and date / time can be performed.

  Hereinafter, representative embodiments of the present invention will be described in detail according to the operation flow shown in FIGS. 4A to 4C. This operation flow is executed by the CPU 130a provided in the display device 130 according to the application program.

  In the present embodiment, the display screen displays the power information of the generated power amount, the consumed power amount, the purchased power amount, and the sold power amount, but it is not necessary to display all of them. Needless to say, the present invention is not limited to this, and other information may be displayed. In the following, it is simply represented as power information.

  4A to 4C show the display function executed by the CPU 130a and the contents of the display screen displayed based on the result of executing this display function. The steps surrounded by the broken line of the display function represent the operation performed by the user, and the CPU 130a detects this operation and executes a predetermined display function.

  In the embodiment described below, the term units such as “weekly” and “monthly” are not weekly and monthly in the calendar, but are units of days, and “weekly” is 7 days. “Monthly” means 30 days for convenience.

  And this operation | movement flow shows the example in the case of browsing the electric power information of July 13, 2014 about one year ago in the state which displays the electric power information by "day unit" corresponding to the present date. Yes. Therefore, before operating the display instruction button, as shown in the display content D10, “daily unit” power information on July 31, 2015, which is the current date, is displayed as a graph. An example of this graph will be described later.

  In step S10, the user depresses a display instruction button (denoted as the [Previous Day] switch in the drawing, and will be described as the [Previous Day] switch in the following for the sake of convenience) and presses the display instruction of the past power information. Perform the operation. When this operation is performed, the CPU 130a first displays the power information in “daily units” on July 30, 2015, which is the previous day, in step S11. Hereinafter, each display function is executed by the CPU 130a.

  In a state where the power information of “daily unit” on July 30, 2015 is displayed, the long press determination is executed in step S12. In the long press determination, it is determined whether or not one second has elapsed since the [Previous Day] switch was pressed. If it is determined that one second has not elapsed, “day unit” power information on July 30, 2015 is continuously displayed as shown in the display content D11.

  As shown in FIG. 6A, the display content D11 of the display screen displays the displayed date D, power information S, and time zone T of the day. The power information S displays the amount of power purchased, the amount of power sold, the amount of generated power, and the amount of power consumed for each time period of the day.

  Here, the amount of electric power purchased (lower line) and the amount of electric power sold (upper line) are displayed in a line graph. Actually, however, the amount of generated power and the amount of electric power consumed are shown as a bar graph corresponding to this line graph. Are also displayed together. Although the display time of the display content D11 is arbitrary, the time required for improving the visibility is empirically determined and is set to 1 second in the present embodiment. As will be described below, this one second is not a strict one second but may include some errors.

  Next, if it is determined in step S12 that one second has elapsed, the process proceeds to step S13, where “daily unit” power information on July 29, 2015, which is the day before the currently displayed date, is displayed. In a state where the power information of “day unit” on July 29, 2015 is displayed, the long press determination is executed in step S14.

  The long press determination in step S14 is determined by measuring the passage of time after it is determined in step S12 that 1 second has elapsed. If it is determined that one second has not elapsed, “day unit” power information on July 29, 2015 is continuously displayed as shown in the display content D12. The display content D12 on the display screen has the same display form as that shown in FIG. 6A.

  Furthermore, if it is determined in step S14 that 1 second has elapsed, the process proceeds to step S15, where “daily unit” power information on July 28, 2015, which is the day before the currently displayed date and time, is displayed. In a state where the power information of “day unit” on July 28, 2015 is displayed, the long press determination is executed in step S16.

  The long press determination in step S16 is made by measuring the passage of time after it is determined in step S14 that 1 second has elapsed, in the same manner as in step S14. If it is determined that one second has not elapsed, “day unit” power information on July 28, 2015 is continuously displayed as shown in the display content D13. The display content D13 on the display screen is the same display form as shown in FIG. 6A.

  As described above, from Step S10 to Step 16, the power information of “daily unit” is updated and displayed a plurality of times (here, three times) retrospectively in the time series. The total time for displaying the power information of “unit” is about 3 seconds. As shown in FIG. 5, “day unit” power information is displayed on the display screen 131 until the first time threshold T1 (0 to T1 = t1 = 3 seconds) is exceeded. In this case, the power information in “day units” is displayed retroactively every day, and if the display instruction operation by the [Previous Day] switch is interrupted in the middle, the current display is displayed in this state. The screen is maintained.

  Therefore, if the [Previous Day] switch is operated and interrupted repeatedly within this time range (t1 = 3 seconds), the power information in "day units" can be displayed while going back. Note that the number of days to be displayed is arbitrary, but if the number of days is increased too much, the operation time becomes longer, and therefore, an appropriate number of days may be set.

  If it is determined in step S16 that one second has elapsed, the process proceeds to step S17, and from the currently displayed date and time (July 28, 2015), “weekly” for the previous seven days. Display power information. In a state where the power information from July 27, 2015 to July 21, 2015 is displayed, the long press determination is executed in step S18.

  The long press determination in step S18 determines the passage of time after it is determined in step S16 that 1 second has elapsed. If it is determined that one second has not elapsed, “weekly” power information from July 27, 2015 to July 21, 2015 is continuously displayed as shown in display content D14. The

  As shown in FIG. 6B, the display content D14 on the display screen displays the displayed date W for 7 days, power information S, and each date DW for 7 days. The power information S displays the amount of power purchased, the amount of power sold, the amount of power generated, and the amount of power consumed for each individual date.

  Here, the amount of purchased electric power and the amount of electric power sold are displayed as line graphs. Actually, however, the amount of generated electric power and the amount of electric power consumed are also displayed as bar graphs corresponding to the line graph. Further, the display time of the display content D14 is arbitrary, but the display time is determined empirically in order to improve the visibility. In this embodiment, the display time is set to 1 second as in “day unit”. Is set.

  If it is determined in step S18 that one second has elapsed, the process proceeds to step S19, where power information for seven days before the “weekly” power information displayed at the present time is displayed. In a state in which the “weekly” power information from July 20, 2015 to July 14, 2015 is displayed, a long press determination is executed in step S20.

  The long press determination in step S20 is determined by measuring the passage of time after it is determined in step S18 that 1 second has elapsed. If it is determined that one second has not elapsed, “weekly” power information from July 20, 2015 to July 14, 2015 is continuously displayed as shown in display content D15. The The display content D14 on the display screen is the same display form as shown in FIG. 6B.

  In this way, from step S17 to step 20, the “weekly” power information is updated and displayed multiple times (here, twice) in the time series. The time for displaying the power information of “unit” is 2 seconds. As described above, the display time of the “daily” power information is 1 second and the display time of the “weekly” power information is also 1 second. Therefore, the “weekly” power information is “daily”. Compared with the power information of “”, the display is updated at a time rate seven times as many days as the same display time. This makes it possible to quickly browse past power information.

  In addition, the power information of “daily unit”, “weekly unit”, and “monthly unit” described later can be displayed corresponding to the operation time of one [Previous Day] switch (= display instruction button). The number of previous day switches (= display instruction buttons) can be reduced.

  As shown in FIG. 5, “weekly” power information is displayed on the display screen 131 until the time (T2−T1 = t2 = 2 seconds) until the second time threshold T2 is exceeded. . In this case, “weekly” power information is displayed sequentially every week, and if the operation with the [Previous Day] switch is interrupted in the middle, the current “weekly” power is displayed in this state. The information display screen is maintained. Note that the number of weeks to be displayed sequentially is arbitrary, but if the number of weeks is increased too much, the operation time becomes longer, and therefore, an appropriate number of weeks may be set.

  Next, if it is determined in step S20 that one second has elapsed, the process proceeds to step S21, and the "monthly" power information for the previous 30 days from the "weekly" power information currently displayed. Is displayed. In a state where the “monthly” power information from July 13, 2015 to June 14, 2015 is displayed, a long press determination is executed in step S22.

  The long press determination in step S22 is determined by measuring the passage of time after it is determined in step S20 that 1 second has elapsed. If it is determined that one second has not elapsed, “Monthly” power information from July 13, 2015 to June 14, 2015 is continuously displayed as shown in display content D16. Is done.

  As shown in FIG. 6C, the display content D16 of the display screen displays the displayed date M for 30 days, power information S, and each date DM for 30 days. The power information S displays the amount of power purchased, the amount of power sold, the amount of power generated, and the amount of power consumed for each individual date.

  Here, the amount of purchased electric power and the amount of electric power sold are displayed as line graphs. Actually, however, the amount of generated electric power and the amount of electric power consumed are also displayed as bar graphs corresponding to the line graph. Although the display time of the display content D15 is arbitrary, the display time is determined empirically to increase the visibility, and is set to 1 second in the present embodiment, as in “daily units”. Has been.

  If it is determined in step S22 that one second has elapsed, the process proceeds to step S23, where “monthly” power information for 30 days before the “monthly” power information currently displayed is displayed. In a state where the “monthly” power information from June 13, 2015 to May 14, 2015 is displayed, the long press determination is executed in step S24.

  The long press determination in step S24 determines the passage of time after it is determined in step S22 that 1 second has elapsed. If it is determined that one second has not elapsed, “Monthly” power information from June 13, 2015 to May 14, 2015 is continuously displayed as shown in display content D17. Is done. The display content D17 on the display screen is the same display form as shown in FIG. 6C. As described above, in step S21 and subsequent steps, the “monthly” power information is updated and displayed in time series retroactively.

  Therefore, as shown in FIG. 5, when the second time threshold value T <b> 2 is exceeded, “monthly” power information is displayed on the display screen 131. In this embodiment, since “monthly” is the maximum period unit, if the “previous day” switch is kept pressed, the display of the power information of “monthly” goes back to the past every second. Thus, it is displayed continuously several times.

  Similar to the “weekly” display, the display time of the “monthly” power information is 1 second, so the “monthly” power information has the same display time as the “daily” power information. However, the display is updated at a time speed of 30 times in terms of days. This makes it possible to browse past power information more quickly.

  Also, as described above, the power information of “daily”, “weekly”, and “monthly” can be displayed corresponding to the operation time of one [Previous Day] switch (= display instruction button). The number of previous day switches (= display instruction buttons) can be reduced. As a result, an increase in the size of the display device 130 can be suppressed.

  Then, when the operation by the [Previous Day] switch is interrupted at the midpoint shown in step S25, the display of the current "monthly" power information is maintained in this state. The display screen D18 at this time is “monthly” power information from August 13, 2014 to July 14, 2014.

  Furthermore, as described above, the date to be browsed is July 13, 2014. Accordingly, the current “monthly” power information display screen content D18 is from August 13, 2014 to July 14, 2014. Power information can be viewed. For this reason, when the user depresses the [Previous Day] switch again, the user can perform the same operation as in Step S10 and the subsequent steps, and can display the power information in “daily units” on July 13, 2014. .

  When the operation of the [Previous Day] switch is interrupted after pressing the [Previous Day] switch to display the "daily unit" power information on July 13, 2014, the "daily unit" on July 13, 2014 "Is continuously displayed as it is.

  Thus, even when trying to confirm the power information of a specific date in the past, the power information of the target date and time can be quickly viewed, and the display can be easily used.

  In the embodiment described above, the case where the past power information display is browsed from the current power information display to the past has been described. However, the past power information display is changed to the current power information display. The same applies to the case of returning. The date and time shown in FIGS. 4A to 4C only changes in the direction from the past to the present.

  Furthermore, in the present embodiment, the power information is displayed in “daily units”, “week units”, and “month units”. However, it is also possible to display “year unit” power information. The method is substantially the same as the “weekly” or “monthly” display method.

  In the embodiment described above, the power information for seven days as “weekly” and 30 days as “monthly” is displayed regardless of the calendar, starting from the date and time when the period unit to be displayed changes. It is also possible to switch between “weekly” and “monthly”.

  For example, the display date and time in step S15 is Tuesday, July 28, 2015, but when switching to “weekly”, July 26, 2015 (Sunday) to July 2015, the week before the calendar. The 20th (Monday) may be displayed as “weekly”, and the “weekly” on the calendar may be displayed retroactively every second.

  Similarly, the display of “weekly” in step S19 is from July 20, 2015 to July 14, 2015, but when switching to “monthly”, June 2015 of the previous month in the calendar is displayed. 30 days to June 01, 2015 may be displayed as “monthly units”, and “monthly units” on the calendar may be displayed retroactively every second.

  As described above, according to the present invention, when the operation time of the display instruction by the display instruction means is short, the power information of the first period unit is displayed, and when the operation time of the display instruction is long, the first period unit is displayed. The power information is displayed for a longer second period unit, and the displayed power information is updated and displayed in time series in correspondence with the operation time.

  According to this, power information in different period units can be displayed by one display instruction means, and the power information can be updated and displayed in time series in different time periods corresponding to the operation time. As a result, the number of display instruction means can be reduced, and an easy-to-use display that allows the user to quickly view the power information of the target period unit and date / time can be performed.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 100 ... Solar power generation system, 101 ... Solar cell module, 102 ... Booster device, 103 ... Junction box, 110 ... Power conditioner, 120 ... Distribution board, 121 ... Voltage sensor, 122 ... Current sensor, 130 ... Display device, 130a ... CPU (processing unit), 131f ... LCD (display unit), 131g, 132 ... display instruction button, 131 ... liquid crystal screen.

Claims (5)

A solar cell module that generates power using solar energy, a power conditioner device that converts electricity generated by the solar cell module from direct current to alternating current, and electricity converted to alternating current by the power conditioner device. A photovoltaic power generation system comprising a distribution board for distributing electricity and a display device for displaying power information sent from the distribution board,
The display device includes a display instruction unit for displaying the power information,
The display device displays the power information in a first period unit when the operation time of the display instruction by the display instruction unit is short, and longer than the first period unit when the operation time of the display instruction is long. The photovoltaic power generation system characterized by displaying the power information in a second period unit and updating the displayed power information in time series in correspondence with the operation time of the display instruction. . In the photovoltaic power generation system according to claim 1,
The photovoltaic power generation system according to claim 1, wherein the power information is one or more pieces of power information of a power generation amount in the solar cell module, a power purchase amount to a power company, and a power consumption amount in a home. The photovoltaic power generation system according to claim 2,
The first period unit is “day unit”, the second period unit is “week unit”,
The display device displays the power information in “day units” until the operation time of the display instruction means exceeds the first operation time, and when the operation time of the display instruction means exceeds the first operation time, A photovoltaic power generation system, wherein the power information is displayed. In the solar power generation system according to claim 3,
In addition to the first period unit and the second period unit, the display device displays the power information in “month unit”, which is a third period unit, and the operation time of the display instruction unit. The power information in “days” is displayed until the first operation time is exceeded, and the power information in “weeks” is displayed until the second operation time is exceeded after the first operation time. Is displayed, and when the second operation time is exceeded, the power information in the “monthly unit” is displayed. In the solar power generation system according to claim 4,
The power information of the “daily unit”, the “weekly unit”, and the “monthly unit” is displayed in a time-sequential manner only a plurality of times in order, The display time of the one piece of power information in the “monthly unit” is set to substantially the same display time.

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