JP2017175679A - Display controller, and power storage system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display controller capable of displaying information easy to see in proper scale, and a power storage system.SOLUTION: A display controller 12 is configured to display an operation condition of a power storage system on a display device and comprises a display setting section and a display control section. In the case where contract power is set to a system 16 to which the power storage system is connected, the display setting section sets scale with respect to information to be displayed on the display device in accordance with the set contract power. The display control section displays information indicating the operation condition in the scale that is set by the display setting section, on the display device.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a display controller and a power storage system.

  In recent years, there is an electricity storage system including a power conditioner (PCS) in which a solar battery and a storage battery are connected. The power storage system is connected to a system of an electric power company, accumulates electricity generated by a solar battery or electricity supplied from the system in a storage battery, and supplies electricity from the storage battery to a load as necessary. The power storage system includes a display controller for changing or controlling the operation mode and notifying the user of the operation status. 2. Description of the Related Art Conventionally, there has been known a management device that displays a power sale amount, a power purchase amount, a power generation amount, a power consumption amount, etc. on a display device in a graph. However, the amount of power to be displayed by the display controller of the power storage system varies depending on the usage environment, and it may be difficult to view the information when displaying a plurality of information in a limited space of the display controller.

JP 2014-21616 A

  An object of the present invention is to provide a display controller and a power storage system that can display easy-to-see information on an appropriate scale.

  According to the embodiment, the display controller displays the operation status of the power storage system on the display device, and includes a display setting unit and a display control unit. The display setting unit sets a scale for information to be displayed on the display device according to the set contract power when the contract power for the system to which the power storage system is connected is set. The display control unit displays information indicating an operation state on the display device on a scale set by the display setting unit.

  According to the present invention, it is possible to provide a display controller and a power storage system that can display easy-to-read information on an appropriate scale.

FIG. 1 is a diagram illustrating a configuration example of a power storage system according to the embodiment. FIG. 2 is a block diagram illustrating a configuration example of a control system of the display controller according to the embodiment. FIG. 3 is a diagram illustrating a first display example of a display screen (history display) indicating an operation state displayed by the display controller according to the embodiment. FIG. 4 is an example of a data table showing an assumed value of the power usage with respect to the contract power stored in the storage unit of the display controller according to the embodiment. FIG. 5 is a diagram illustrating an example of a contract power setting screen displayed by the display controller according to the embodiment. FIG. 6 is a diagram illustrating a second display example of the display screen (history display) indicating the driving situation displayed by the display controller according to the embodiment. FIG. 7 is a diagram illustrating a third display example of the display screen (history display) indicating the driving situation displayed by the display controller according to the embodiment. FIG. 8 is a diagram illustrating a fourth display example of the display screen (history display) indicating the driving situation displayed by the display controller according to the embodiment. FIG. 9 is a flowchart for explaining a display screen display process indicating an operation state according to the setting of contract power by the display controller according to the embodiment. FIG. 10 is a flowchart for explaining display setting processing by the display controller according to the embodiment.

  The display controller (12) according to the embodiment described below displays the operation status of the power storage system (1) on the display device (24), and includes a display setting unit (S12) and a display control unit (S14-). S16). The display setting unit (S12) sets a scale for information displayed on the display device in accordance with the set contract power when the contract power for the system to which the power storage system is connected is set. A display control part (S14-S16) displays the information which shows an operating condition on the scale set by the display setting part (S12) on a display apparatus (24).

  Further, the display controller (12) according to the embodiment described below further includes a storage unit (23) and an acquisition unit (S21). The storage unit (23) stores information indicating the relationship between the contract power and the power usage. When the contract power for the grid (16) to which the power storage system (1) is connected is set, the acquisition unit (S21) stores the estimated value of the power usage corresponding to the set contract power. Obtained based on the information indicating the relationship between the stored contract power and the power consumption. The display setting unit (S12) sets a scale for the information displayed on the display device (24) according to the assumed value of the power usage amount acquired by the acquisition unit.

Further, the display setting unit (S12) of the display controller (12) according to the embodiment described below sets the upper limit value of the scale for the information displayed on the display device (24).
Further, the display setting unit (S12) of the display controller (12) according to the embodiment described below sets the lower limit value of the scale for the information displayed on the display device (24).

Further, the display setting unit (S12) of the display controller (12) according to the embodiment described below sets a scale for the power consumption as information to be displayed on the display device (24).
Further, the display setting unit (S12) of the display controller (12) according to the embodiment described below sets a scale for the self-sufficiency rate as information displayed on the display device (24).
Further, the display control unit (S16) of the display controller (12) according to the embodiment described below has a size of information displayed on the display device (24) exceeding the scale set by the display setting unit (S12). If this value is reached, the information is blinked.

  The power storage system (1) according to the embodiment described below includes a conditioner (11), a display controller (12), a power storage device (13), and a power generation device (14), and a display setting unit (S12). And a display control unit (S14-S16). When the contract power for the system (16) to which the power storage system (1) is connected is set, the display setting unit (S12) sets a scale for information displayed on the display device (24) according to the set contract power. Set. A display control part (S14-S16) displays the information which shows an operating condition on the scale set by the display setting part (S12) on a display apparatus (24).

Hereinafter, embodiments will be described in detail with reference to the drawings.
FIG. 1 is a diagram illustrating a configuration example of a system including a power storage system according to the embodiment.
In the configuration example illustrated in FIG. 1, the power storage system 1 is a system including a power conditioner (PCS) 11, a display controller (display device) 12, a storage battery 13, and a solar battery module 14. In the power storage system 1, the display controller 12, the storage battery 13, and the solar battery module 14 are connected to the PCS 11. The PCS 11 is connected to a system (commercial power supply, system power supply) 16 and a load 17 via a distribution board 15.

  The PCS 11 is a control unit that controls electric power in the power storage system 1. For example, the PCS 11 controls charging / discharging of the storage battery 13 according to various operation modes or operation instructions. The PCS 11 has a conversion circuit that converts DC power into AC power, converts DC power supplied from the solar cell module 14 and DC power discharged from the storage battery 13 into AC power, and separates the converted AC power. The electric power is supplied to the load 17 or the system 16 through the electric board 15. In addition, the PCS 11 supplies power from the solar cell module 14 or power supplied via the distribution board 15 to the storage battery 13 to control power storage.

  The display controller 12 displays the operation status in the system on a display device. The display controller 12 acquires information such as a power value in each unit from the PCS 11 or each of the measuring instruments M1, M2, and M3, and controls display contents to be displayed on the display device based on the acquired information. The display controller 12 only needs to be able to control information to be displayed on the display device. For example, the display controller 12 may be an information terminal having a display device such as a display panel and an operation device such as a touch panel, or may display information on a display unit of an information terminal capable of communication connection. good.

  The storage battery 13 is a power storage device that stores (stores) electric power. In the configuration example shown in FIG. 1, charging and discharging of the storage battery 13 are controlled by the PCS 11. For example, the storage battery 13 supplies the stored power to the PCS 11 in response to a discharge instruction. Further, the storage battery 13 is charged with electric power supplied via the PCS 11.

  The solar cell module 14 is a power generator that generates electricity in the power storage system 1. The solar cell module 14 is a solar power generation system that converts sunlight condensed by a solar panel or the like into electric power. The solar cell module 14 supplies power generated from sunlight to the PCS 11. The power generation device in the power storage system 1 is not limited to the solar cell module (solar power generation device), and may be a power generation device of another power generation method.

The measuring instruments M1, M2, and M3 are units that measure power.
The measuring instrument M1 measures the electric power supplied from the solar cell module 14 to the PCS 11. The measurement value measured by the measuring instrument M1 indicates the power generated by the solar cell module 14. The PCS 11 has a function of acquiring the measurement value of the measuring instrument M1. The display controller 12 acquires the measurement value of the measuring instrument M1 via the PCS 11. The PCS 11 or the display controller 12 specifies the power and the power generation amount generated by the solar cell module 14 based on the measurement value measured by the measuring instrument M1. Note that the display controller 12 may directly acquire a value measured by the measuring instrument M1.

  The measuring instrument M2 measures the power output from the PCS 11 to the distribution board 15. The PCS 11 has a function of acquiring the measurement value of the measuring instrument M2. The display controller 12 acquires the measurement value of the measuring instrument M2 via the PCS 11. The PCS 11 or the display controller 12 specifies the electric power and the electric energy output from the PCS 11 (power storage system 1) based on the measurement value of the measuring instrument M2. Note that the display controller 12 may directly acquire the value measured by the measuring instrument M2.

  The measuring instrument M3 measures main power (system power) as power supplied (purchased) from the system 16 or output (power sold) to the system 16. The measuring instrument M3 indicates the power supplied from the grid 16 as a positive value, and indicates the power output to the grid 16 as a negative value. That is, the positive value power measured by the measuring instrument M3 indicates the purchased power from the grid 16, and the negative power measured by the measuring instrument M3 indicates the power sold to the grid 16. The PCS 11 has a function of acquiring main power (purchased power or sold power) as a measured value measured by the measuring instrument M3. The display controller 12 acquires the main power as the measurement value of the measuring instrument M3 via the PCS 11. The PCS 11 or the display controller 12 specifies purchased power, sold power, purchased power (power sold) or sold power (power sold) based on the measurement value of the measuring instrument M3. Note that the display controller 12 may directly acquire a value measured by the measuring instrument M3.

Next, the configuration of the display controller 12 according to the embodiment will be described.
FIG. 2 is a diagram illustrating a configuration example of the display controller 12 according to the embodiment.
The display controller 12 includes a control unit 21, an interface (I / F) 22, a storage unit 23, a display unit (display device) 24, and an operation unit 25.
The control unit 21 includes a processor such as a CPU (Central Processing Unit), a working memory such as a RAM, a program memory such as a ROM, and various internal interfaces. The control unit 21 implements various processing functions when the processor executes a program. For example, in the control unit 21, the processor implements various processes by executing a program stored in the program memory or the storage unit 23 using the working memory.

  The interface 22 functions as an acquisition unit that acquires information such as power in each unit. In the configuration example illustrated in FIG. 2, the interface 22 is an interface for transmitting and receiving information to and from the PCS 11. The interface 22 acquires information such as measurement values of the measuring instruments M1, M2, and M3 from the PCS 11, for example. The interface 22 may acquire information such as measurement values from the measuring instruments M1, M2, and M3.

  The storage unit 23 is realized by, for example, a semiconductor memory device such as a random access memory (RAM) or a flash memory, a storage device such as a hard disk, or an optical disk. The memory | storage part 23 memorize | stores the information regarding the electric power in the said system. For example, the storage unit 23 stores power information for each of various units (seconds, minutes, hours, days, months, years, etc.). The power information stored in the storage unit 23 is sold to the system, the generated power indicating the power generated by the solar power generation system 14, the power consumption indicating the power consumed by the load 17, the purchased power indicating the power purchased from the system 16, and the system. For example, power selling power indicating power.

  The display unit 24 is a display device whose display content is controlled by the control unit 21. The display unit 24 includes, for example, a display device such as an LCD (Liquid Crystal Display) or an organic EL display. The display unit 24 may be a display device with which the control unit 21 can communicate by wireless communication or the like.

  The operation unit 25 receives user operations. The operation unit 25 is configured by a touch panel or a hard key. For example, the operation unit 25 may be configured by a touch panel provided on the display screen by the display unit 24 and may receive user instructions for various operation keys displayed on the display unit 24.

  The display controller 12 may include a communication unit for performing wireless communication or wired communication. For example, the display controller 12 may transmit and receive information such as information on the power status by performing communication with a home gateway device compatible with HEMS (Home Energy Management System) by the communication unit.

Next, functions realized by the control unit 21 of the display controller 12 will be described.
The control unit 21 implements various processing functions when the processor executes a program. For example, the control unit 21 has a function (setting unit) for setting contract power and the like by an operator's operation, a function (acquisition unit) for acquiring an assumed value of power usage corresponding to the contract power, and a power use corresponding to the contract power. It has a function (display setting unit) that performs display setting according to the assumed value of the amount, a function (display control unit) that controls display of the display unit 24 according to the display setting, and the like.

  However, each function realized by the control unit 21 described in the present embodiment is not limited to a function realized by the display controller 12, and may be any one realized by any device in the power storage system 1. For example, part or all of the functions realized by the control unit 21 may be realized by the PCS 11 or an information processing apparatus connected to the PCS 11.

  Based on the measurement values of the measuring instruments M1, M2, and M3, the control unit 21 generates power from the solar cell module 14, power purchased from the grid 16, power sold to the grid 16, power consumption, self-sufficiency, and the like. Is identified. That is, the control unit 21 specifies the generated power of the solar cell module 14 based on the measurement value of the measuring instrument M1. Further, the control unit 21 specifies the purchased power from the grid 16 or the sold power to the grid 16 based on the measurement value of the measuring instrument M3. Furthermore, the control part 21 calculates information, such as power consumption and a self-sufficiency rate, based on the measured value of each measuring device M1, M2, and M3.

Here, a method for calculating the power consumption and the self-sufficiency rate will be described.
The power consumption is defined by the following formula (1).
Power consumption = output power from PCS 11 (power storage system 1) + main power (1)
In the configuration shown in FIG. 1, the output power from the PCS 11 is the output power from the power storage system 1, and is a measured value measured by the measuring instrument M2. Further, in the configuration shown in FIG. 1, the main power (power purchased or power sold) is a measured value of the measuring instrument M3. When the measured value of the measuring instrument M3 is positive, it indicates the magnitude of the purchased power, and when it is negative, it indicates the magnitude of the sold power. Therefore, the control unit 21 calculates, as power consumption, a value obtained by adding the measurement value of the measuring instrument M2 and the measurement value of the measuring instrument M3.

The self-sufficiency rate is defined by the following equation (2).
Self-sufficiency rate = generated power / power consumption ... (2)
In the configuration shown in FIG. 1, the generated power of the formula (2) is the generated power of the solar cell module 14, and the power consumption of the formula (2) is a value calculated by the formula (1). The control unit 21 calculates the generated power (measured value of the measuring instrument M1) / power consumption of the solar cell module 14 as the self-sufficiency rate for the generated power of the power storage system 1. The power consumption calculated by Equation (1) is smaller than the generated power if there is power sale. For this reason, the self-sufficiency rate calculated by the equation (2) may be a value exceeding 100% when there is power sale.

Next, an example of a display screen (history display) showing the driving situation displayed on the display unit 24 by the display controller 12 will be described.
FIG. 3 is a diagram illustrating a first display example displayed on the display unit 24 by the display controller 12. FIG. 3 is an example of a display screen showing the driving situation. The first display example shown in FIG. 3 displays a transition graph in which a graph of power generation, a graph of power consumption, and a self-sufficiency rate are displayed side by side as a history.

  The graph of the amount of power generation is information indicating the state (history) of power generation by the solar cell module 14, and is a graph that displays the amount of power obtained by integrating the generated power for one day as a bar graph for one week. The power consumption graph is information indicating the power consumption status (history) calculated by the above-described calculation, and is a graph that displays the power amount obtained by integrating the power consumption for one day as a bar graph for one week. . The self-sufficiency rate graph is information indicating the status (history) of the self-sufficiency rate calculated by the above-described calculation, and is a graph that displays the daily self-sufficiency rate as a bar graph for one week. In the first display example shown in FIG. 3, each graph is displayed with a scale set as an initial setting.

Next, the relationship between contract received power (contract power) for the grid 16 and power usage will be described.
FIG. 4 is an example of a data table showing the assumed value of the power usage with respect to the contract power.
It is known that there is a correlation between contract power with a power company or the like (contract power of the grid 16) and power consumption. For example, as the contract power with the power company or the like (contract power of the grid 16) increases, the power usage tends to increase. As a result calculated statistically, for example, there is a correlation between contract power and power consumption as shown in FIG. In the power storage system 1 according to the present embodiment, a data table as shown in FIG. 4 is stored in the storage unit 23 of the display controller 12.

  By referring to the information as shown in FIG. 4, it is possible to predict the amount of power used according to the contract power. Furthermore, if the power usage can be predicted, the maximum value of the power consumption can be predicted from the power usage. The display controller 12 of the power storage system 1 according to the present embodiment predicts the power usage from the set value of the contract power, and predicts the maximum value of the power consumption based on the prediction of the power usage. Furthermore, the display controller 12 can set a display scale in a graph of each information (for example, power consumption, self-sufficiency rate) according to the predicted maximum value of power consumption.

  Furthermore, in the example of the data table shown in FIG. 4, an assumed value of the amount of power generated by the solar cell module 14 is stored. Although the power generation amount of the solar cell module 14 varies depending on conditions such as the weather, the power generation amount can be assumed according to the performance of the solar cell module 14 and the installation environment. Thereby, in the electrical storage system 1 which concerns on this embodiment, the value assumed as the electric power generation amount of the solar cell module 1 shall be set. In the example illustrated in FIG. 4, the power generation amount assumed in the solar cell module 14 of the power storage system 1 is stored. Since the power generation amount of the solar cell module 14 is information used for calculating the self-sufficiency rate, the self-sufficiency rate can be predicted based on the assumed value of the power consumption amount and the assumed power generation amount of the solar cell module 14.

  The display controller 12 of the power storage system 1 according to the present embodiment refers to the information shown in FIG. 4, so that the power consumption amount based on the assumed value of the power usage amount according to the contract power and the power generation amount of the solar cell module 14 are determined. The self-sufficiency rate is predicted based on the assumed value. Furthermore, the display controller 12 estimates the maximum value of the self-sufficiency rate based on the prediction of the self-sufficiency rate, and sets a display scale assuming the maximum value of the self-sufficiency rate.

Next, the setting of contract power in the display controller 12 will be described.
The display controller 12 sets various information according to the operation instruction of the operator. For example, the display controller 12 assigns a setting number to each settable information and stores it in the storage unit 23. When the operator designates a setting number using the operation unit 25, the display controller 12 receives a setting value for information corresponding to the designated setting number.

FIG. 5 is a diagram illustrating an example of a contract power setting screen.
Here, it is assumed that the contract power is associated with the setting number “15”. In this case, when the operator designates the setting number “15” using the operation unit 25, the display controller 12 displays a contract power setting screen corresponding to the setting number as shown in FIG. 5 on the display unit 24. In the state where the setting screen shown in FIG. 5 is displayed, the display controller 12 receives an input of the set value of the contract power. When the operator instructs “06000.00” from the operation unit 25, the display controller 12 displays the designated “06000.00” on the display unit 24 as shown in FIG. 06000.00 ". Here, the contract power “06000.00” indicates that the contract power is 60 amperes [A].

  Note that the method for setting contract power in the power storage system according to the present embodiment is not limited to that using the setting screen shown in FIG. The power storage system according to the present embodiment may use any setting method as long as the contract power can be set by an operator's operation.

Next, a display example based on display settings corresponding to contract power will be described.
In the power storage system 1 according to the present embodiment, the contract power is set by the operation of the operator as described above. For example, when the contract power is set, the display controller 12 of the power storage system 1 refers to a data table indicating the relationship between the contract power and the power usage, and assumes an assumed value of the power usage corresponding to the contract power setting value. Is obtained (predicted). When the assumed value of the power usage corresponding to the contract power is acquired, the display controller 12 performs display settings for providing a display screen according to the assumed value of the power usage. For example, the display controller 12 changes the scale for displaying a graph such as the power consumption amount or the self-sufficiency rate according to the assumed value of the power usage corresponding to the set value of the contract power.

FIG. 6 is a diagram illustrating a second display example of a display screen (history display) indicating an operation status displayed on the display unit 24 by the display controller 12.
FIG. 6 is obtained by changing the scale in the graph of power consumption (consumption) with respect to the first display example shown in FIG. In the first display example shown in FIG. 3, the consumption scale is 0 to 20 kwh, whereas in the second display example shown in FIG. 6, the consumption graph scale is changed to 0 to 40 kwh. ing. In the second display example shown in FIG. 6, by changing the upper limit value of the scale in the consumption graph, consumption exceeding 20 kwh (for example, a bar graph four days before consumption in FIG. 6) can be displayed. . That is, even if the initial setting value is set to a scale as shown in FIG. 3, by changing the scale according to the contract power, the display controller 12 cannot display with the initial setting value 20 to 20. A consumption amount of 40 kwh can be displayed.

  According to the data table shown in FIG. 4, in the contract power of 60A, the assumed value of the power consumption per day is set as 17.8 kwh. With such an assumed value, it can be sufficiently predicted that there will be a day when the actual power consumption per day exceeds 20 kwh. For example, if it is possible to display a consumption amount that is twice as much as the estimated value of the power consumption per day, the display controller 12 can display the scale of the consumption graph when the contract power is set to 60A. Is considered to be up to 40 kwh.

FIG. 7 is a diagram illustrating a third display example of a display screen (history display) indicating an operation status displayed on the display unit 24 by the display controller 12.
FIG. 7 is obtained by changing the scale in the consumption graph with respect to the first display example shown in FIG. In the third display example shown in FIG. 7, the scale of the consumption graph is set to 10 to 30 kwh. That is, in the third display example shown in FIG. 7, not only the upper limit value of the vertical axis is changed but also the lower limit value is changed from 0 with respect to the scale shown in FIG. Thus, in the third display example shown in FIG. 7, in the consumption graph, the consumption can be displayed on a scale in which 20 ± 10 kwh is set as the display range. When the consumption varies between 10 and 30 kwh, it is considered that the transition of consumption can be easily recognized by changing the scale of the initial setting value shown in FIG. 3 to the scale of the third display example shown in FIG. It is done.

  According to the data table shown in FIG. 4, in the contract power of 60A, the assumed value of the power consumption per day is set as 17.8 kwh. When it can be predicted that the amount of consumption will fluctuate in the range of ± 10 kwh with respect to such an assumed value, the display controller 12 sets the scale of the graph of consumption to 10 to 30 kwh when the contract power is set to 60A. It is possible to do.

  As in the second and third display examples described above, the upper limit value and the lower limit value to be set according to the assumed value of the power consumption corresponding to the contract power depends on the setting environment, operation mode, etc. Is appropriately determined depending on the situation. The display controller 12 of the power storage system 1 according to the present embodiment sets a scale according to the assumed value of the power usage corresponding to the contract power, and displays a screen (history) showing the operation status on the scale according to the set value of the contract power Display).

FIG. 8 is a diagram illustrating a fourth display example of a display screen (history display) indicating an operation status displayed on the display unit 24 by the display controller 12.
FIG. 8 is obtained by changing the scale in the self-sufficiency rate graph with respect to the second display example shown in FIG. In the fourth display example shown in FIG. 8, the scale of the self-sufficiency rate graph is set to 0 to 120%. That is, only the self-sufficiency rate up to 100% can be confirmed on the scale of the initial setting value shown in FIG. 3, whereas in the fourth display example shown in FIG. 8, the self-sufficiency rate up to 120% can be displayed. The amount exceeding 100% can be presented to the user.

  That is, the display controller 12 of the power storage system 1 is not limited to the amount of consumption of information for changing the display scale according to the setting of the contract power, and as shown in the fourth display example, the power such as the self-sufficiency rate You can also change the display scale of various information that affects usage.

  As in the above-described fourth display example, which information display scale is changed with respect to the set value of the contract power is appropriately set according to the setting environment, the operation mode, and the like. In the display controller 12 of the power storage system 1 according to the present embodiment, the upper limit and lower limit values of the consumption scale and the upper limit and lower limit values of the self-sufficiency scale are set according to the assumed value of the power consumption corresponding to the contract power. It can be done.

Next, a display process of a display screen that shows an operation state according to the setting of contract power in the power storage system 1 will be described.
FIG. 9 is a flowchart for explaining display screen display processing indicating an operation state according to the setting of contract power by the display controller 12 according to the present embodiment.
The control unit 21 of the display controller 12 accepts operation instructions such as various setting and history display instructions from the operator by the operation unit 25. For example, the control unit 21 of the display controller 12 receives an input of the set value of the contract power on the setting screen as shown in FIG. When the control unit 21 of the display controller 12 is instructed to confirm (set) the contract power with the input set value, the control unit 21 sets the contract power to the input set value.

  When the contract power is set (S11, YES), the control unit 21 executes a display setting process according to the set contract power (S12). The control unit 21 performs display setting according to the set contract power in the display setting process. In the present embodiment, in the display setting process, the control unit 21 predicts the power usage amount corresponding to the contract power (acquires an assumed value of the power usage amount), and displays various information according to the predicted power usage amount. Set the scale to be used. The display setting process will be described later in detail.

  Moreover, the control part 21 receives the display instruction | indication of the driving condition by the operation part 25 (S13). If there is no operation status display instruction (S13, NO), the control unit 21 returns to S11 and accepts various settings such as contract power settings.

  When receiving an instruction to display the driving situation (S13, YES), the control unit 21 executes a process of displaying a display screen (history) indicating the driving situation with the display content set by the display setting process (S14 to S16). . When displaying the display screen which shows a driving condition, the control part 21 acquires each data to display (S14). For example, when a transition graph as shown in FIGS. 6 to 8 is displayed as a display screen showing the driving situation, the control unit 21 sets the power generation amount, power consumption (consumption amount), and self-sufficiency rate in units of one day to 1. Get a week's worth.

These pieces of information may be calculated from the measurement values of the measuring instruments M1, M2, and M3 accumulated in the storage unit 23 by the control unit 21 of the display controller 12.
In addition, information such as power generation amount, power consumption amount (consumption amount) and self-sufficiency rate is calculated and stored by the PCS 11 from the measurement values of the measuring instruments M1, M2, and M3, and the control unit 21 of the display controller 12 Information such as the amount of power generation, power consumption (consumption), and self-sufficiency may be acquired from the PCS 11 via the interface 22.

  When the data to be displayed on the display screen indicating the operation status is acquired, the control unit 21 generates display data for the display screen in which the scale and the like are set according to the display setting (S15). That is, the control unit 21 generates a graph that displays each piece of information (power generation amount, consumption amount, and self-sufficiency rate) with a display setting scale corresponding to the assumed value of the power usage corresponding to the contract power, Display data of a transition graph (display screen showing the operation status) as shown in FIGS.

When the display data of the display screen indicating the driving situation is generated, the control unit 21 displays the generated display data on the display unit 24 (S16). As a result, a transition graph as shown in FIGS. 6 to 8 is displayed on the display unit 24 at a scale set according to the contract power by the display setting process.
In addition, when there is information that blinks because the value exceeds the upper limit of the scale, the control unit 21 blinks and displays information on the value that exceeds the upper limit of the scale while displaying the display screen indicating the operation status. Let

In the display processing as described above, when the contract power for the grid is set, the display controller of the power storage system sets the scale for the information displayed on the display unit according to the set contract power, and the set contract power The information indicating the driving situation is displayed on a scale corresponding to.
According to the display process described above, the display controller of the power storage system can provide the user with easy-to-see information on an appropriate scale optimized according to the set contract power.
In addition, various displays can be performed based on information that is centrally managed by the inverter.

Next, a display setting process according to the contract power in the power storage system 1 will be described.
FIG. 10 is a flowchart for explaining an operation example of display setting processing according to the set value of contract power by the display controller 12.
When the contract power is set, the control unit 21 of the display controller 12 executes display setting processing. The control unit 21 acquires (predicts) an assumed value of power usage corresponding to the set contract power as the display setting process (S21). For example, the control unit 21 acquires (predicts) an assumed value of power usage corresponding to the contract power from a data table as illustrated in FIG. 4 stored in the storage unit 23.

  Note that the assumed value of the power usage is not limited to being acquired from the data table in which the contract power and the power usage are associated with each other, but information indicating the relationship between the contract power and the power usage (for example, The prediction may be made based on the relationship between the two. Moreover, you may make it the control part 21 acquire the estimated value of the electric power consumption corresponding to contract electric power from the external apparatus which can communicate.

When acquiring (predicting) the power consumption corresponding to the contract power, the control unit 21 sets a scale for displaying the power consumption (scale of the power consumption graph) (S22, S23).
As the setting of the power consumption amount scale, the control unit 21 sets the upper limit value of the power consumption amount scale (S22). The control unit 21 may set the upper limit value of the power consumption amount scale based on a value calculated by a predetermined calculation with respect to the assumed value of the power usage amount, or may be associated with the contract power or the power usage amount. You may set based on the preset setting value.

  In the former case, for example, the control unit 21 estimates (calculates) the maximum value of power consumption from the assumed value of power consumption, and sets a scale that can display the estimated maximum value of power consumption as the upper limit value. What should I do? In the latter case, for example, in the data table as shown in FIG. 4, an upper limit value of the power consumption scale is set in association with each contract power, and the control unit 21 refers to the data table and contracts. The upper limit value of the power consumption scale corresponding to the power setting value may be set.

  Moreover, the control part 21 sets the lower limit of the scale of power consumption (S23). The control unit 21 may set the lower limit value of the power consumption scale based on a value calculated by a predetermined calculation with respect to the assumed value of the power consumption, or may be associated with the contract power or the power usage. You may set based on the preset setting value.

  In the former case, for example, the control unit 21 estimates (calculates) the minimum value of the power consumption from the assumed value of the power consumption, and sets a scale that can display the estimated minimum value of the power consumption as the lower limit value. What should I do? In the latter case, for example, a lower limit value of the power consumption scale is set in association with each contract power in the data table as shown in FIG. 4, and the control unit 21 refers to the data table and contracts. The lower limit value of the power consumption scale corresponding to the power setting value may be set.

If the scale of power consumption is set, the control part 21 will acquire the estimated value of the electric power generation amount of the solar cell module 14 (S24). For example, the control part 21 shall memorize | store the assumption value of the electric power generation amount of the solar cell module 14 in the memory | storage part 23, as shown in FIG. In this case, the control unit 21 acquires the estimated value of the power generation amount by reading the storage unit 23.
When the assumed value of the power generation amount is acquired, the control unit 21 calculates the assumed value of the self-sufficiency rate (S25). When the assumed value of the self-sufficiency rate is calculated, the control unit 21 sets a scale for displaying the self-sufficiency rate (scale of the self-sufficiency rate graph) (S26, S27).

  As a setting of the self-sufficiency scale, the control unit 21 sets an upper limit value of the self-sufficiency scale (S26). The control unit 21 may set an upper limit value of the scale based on a value calculated by a predetermined calculation with respect to the assumed value of the self-sufficiency rate, or may be set in advance in association with contract power or power usage. The upper limit value of the scale may be set based on the value.

  In the former case, for example, the control unit 21 estimates (calculates) the maximum value of power consumption from the assumed value of the self-sufficiency rate, and sets a scale that can display the estimated maximum value of the self-sufficiency rate as an upper limit value. It ’s fine. In the latter case, for example, an upper limit value of the self-sufficiency scale is set in association with each contract power in the data table as shown in FIG. 4, and the control unit 21 refers to the data table and contract power The upper limit value of the self-sufficiency ratio according to the set value may be set.

  Further, as the setting of the self-sufficiency rate scale, the control unit 21 sets the lower limit value of the self-sufficiency rate scale (S23). The control unit 21 may set the lower limit value of the scale of the self-sufficiency rate based on a value calculated by a predetermined calculation with respect to the assumed value of the self-sufficiency rate, or set in advance in association with the contract power or the power usage amount. The lower limit may be set based on the set value.

  In the former case, for example, the control unit 21 estimates (calculates) the minimum value of the self-sufficiency rate from the assumed value of the self-sufficiency rate, and sets a scale that can display the estimated minimum value of the self-sufficiency rate as the lower limit value. good. In the latter case, for example, in the data table as shown in FIG. 4, a lower limit value of the self-sufficiency rate scale is set in association with each contract power, and the control unit 21 refers to the data table and contract power The lower limit value of the self-sufficiency scale according to the set value may be set.

  In the display setting process as described above, when the contract power for the grid is set, the display controller of the power storage system calculates the estimated value of the power usage corresponding to the set contract power between the contract power and the power usage. And a scale for the power consumption and the self-sufficiency rate to be displayed on the display unit is set according to the assumed value of the acquired power usage. Further, in the display setting process, the display controller sets an upper limit value and a lower limit value of the scale according to the assumed value of the power usage corresponding to the contract power as the scale setting.

  According to the display setting process as described above, it is possible to display information such as power consumption and self-sufficiency rate on a scale optimized according to contract power, which is clearer and easier to understand than a screen displayed on a fixed scale. History display with easy display settings can be provided.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Power storage system, 11 ... Power conditioner, 12 ... Display controller, 13 ... Storage battery (power storage device), 14 ... Solar cell module (power generation device), 16 ... System (commercial power supply, system power supply), 17 ... Load, 21 Control unit, 22 Interface, 23 Storage unit, 24 Display unit, 25 Operation unit, M1, M2, M3 Measuring instrument.

Claims (8)

In the display controller that displays the operating status of the power storage system on the display device,
When the contract power for the grid to which the power storage system is connected is set, a display setting unit that sets a scale for information displayed on the display device according to the set contract power;
A display control unit for displaying information indicating an operation state on the display device on a scale set by the display setting unit;
Display controller. Furthermore, a storage unit that stores information indicating the relationship between contract power and power usage,
Information indicating the relationship between the contract power stored in the storage unit and the power usage when the contracted power for the system to which the power storage system is connected is set and the storage unit stores the estimated value of the power usage corresponding to the set contract power And an acquisition unit for acquiring based on
The display setting unit sets a scale for information displayed on the display device according to an assumed value of power usage acquired by the acquisition unit.
The display controller according to claim 1. The display setting unit sets an upper limit value of a scale for information displayed on the display device.
The display controller according to claim 1. The display setting unit sets a lower limit value of a scale for information displayed on the display device.
The display controller according to claim 1. The display setting unit sets a scale for power consumption as information to be displayed on the display device.
The display controller according to claim 1. The display setting unit sets a scale for the self-sufficiency rate as information to be displayed on the display device.
The display controller according to any one of claims 1 to 5. The display control unit blinks the information when the size of information displayed on the display device is a value exceeding the scale set by the display setting unit.
The display controller according to claim 1. In a power storage system having a power conditioner, a display controller, a power generation device and a power storage device,
When contract power for the grid to which the power storage system is connected is set, a display setting unit that sets a scale for information displayed on the display device according to the set contract power;
A display control unit for displaying information indicating an operation state on the display device on a scale set by the display setting unit;
A power storage system.