JP6440082B2 - Energy management device and program - Google Patents

Description

  The present invention relates to an energy management device and a program.

  2. Description of the Related Art In recent years, energy management systems such as HEMS (Home Energy Management System) have attracted attention with the movement of power system stabilization and power market liberalization.

  In addition, in a system such as HEMS, a technique for predicting power consumption is known. For example, Patent Literature 1 discloses a device management system that predicts power consumption based on past power consumption history.

JP 2014-233195 A JP 2014-100045 A

  By the way, in a system such as HEMS, when the user determines a target value of power consumption or a target value of electricity bill, the system can enable the user to achieve the target value of power consumption. Appropriate information needs to be provided to the user.

  The present invention provides an energy management apparatus and program capable of providing a user with information for achieving the target value of power consumption or the target value of electricity charges.

  An energy management apparatus according to an aspect of the present invention is an energy management apparatus that manages power consumption in a consumer, the first acquisition unit that acquires power consumption in the consumer, and the demand in a first period. A second acquisition unit for acquiring a target value of power consumption of the house or a target value of the electricity charge of the consumer in the first period, and a day in the first period for achieving the acquired target value The calculation unit for calculating another target power consumption amount, and the first cumulative value of the power consumption amount from the start to the middle of the first period, the daily target consumption from the start of the first period to the middle A determination unit that determines whether or not the second cumulative value of the electric energy has been exceeded, and the acquired electric power consumption for each branch circuit provided in the consumer, the base electric power consumption and the base electric power consumption Power consumption that changes more over time A non-base power consumption amount that is a power consumption amount other than the base power consumption amount, and the determination unit determines that the first cumulative value exceeds the second cumulative value A branch circuit in which the base power consumption in the second period near the time when the first cumulative value exceeds the second cumulative value is greater than the past base power consumption, and the non-base power consumption in the second period An extraction unit that extracts at least one of the branch circuits whose amount is larger than the past non-base power consumption, information indicating the branch circuit extracted by the extraction unit, and relatively consumed in the second period in the branch circuit And an output unit that outputs display information for displaying an image indicating a time zone with a large amount of power during the first period.

  A program according to an aspect of the present invention is a program for causing a computer to function as the energy management apparatus.

  The present invention can provide a user with information for achieving the target value of power consumption or the target value of electricity charges.

FIG. 1 is a block diagram illustrating a configuration of an energy management system according to an embodiment. FIG. 2 is an external view of a device constituting the energy management system according to the embodiment. FIG. 3 is a diagram illustrating an example of names of a plurality of branch circuits stored in the storage unit. FIG. 4 is a diagram illustrating an example of the base power consumption and the non-base power consumption. FIG. 5 is a diagram for explaining the second period. FIG. 6 is a diagram illustrating an example of an image displayed on the display unit. FIG. 7 is a flowchart of the determination process of the energy management apparatus. FIG. 8 is a diagram for explaining a method of calculating the daily target power consumption. FIG. 9 is a diagram for explaining determination by the determination unit. FIG. 10 is a flowchart of the display information output process. FIG. 11 is a diagram illustrating another example of an image displayed on the display unit.

  Hereinafter, embodiments will be described with reference to the drawings. It should be noted that each of the embodiments described below shows a comprehensive or specific example. The numerical values, shapes, materials, constituent elements, arrangement positions and connecting forms of the constituent elements, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily shown strictly. Moreover, in each figure, the same code | symbol is attached | subjected to substantially the same structure, and the overlapping description may be abbreviate | omitted or simplified.

(Embodiment)
[Entire configuration of energy management system]
First, the overall configuration of the energy management system according to the embodiment will be described. FIG. 1 is a block diagram illustrating a configuration of an energy management system according to an embodiment. FIG. 2 is an external view of a device provided in the energy management system.

  As shown in FIGS. 1 and 2, the energy management system 10 includes a power measuring device 20, an energy management device 30, and a display device 50.

  The energy management system 10 is provided in the consumer 5 and is a system for managing the power usage status in the consumer 5. In the energy management system 10, specifically, the power consumption (power consumption) in the consumer 5 measured by the power measurement device 20 by the energy management device 30 is managed.

  In the energy management system 10, for example, a target value of power consumption for one month (one month) or a target value of electricity bill for one month is set by the user. When the power consumption amount or the electricity charge is predicted to exceed the target value, the energy management device 30 outputs the display information, and the branch circuit 12 that is considered to have room for power saving in the consumer 5. The display information for displaying the image showing is output. As a result, the image is displayed on the display device 50.

  In other words, such display information is information for achieving the target value of power consumption or the target value of electricity charges. That is, the energy management system 10 (energy management device 30) can provide the user with information for achieving the target value of power consumption or electricity rate. Hereinafter, each component which comprises the energy management system 10 is demonstrated.

[Power measurement device]
The power measuring device 20 is a distribution board having a power measuring function and a wireless communication function. The power measuring device 20 has a main breaker 21 for turning on or off the power supply from the power system 80 through the main line 11. The main breaker 21 is a breaker that stops the supply of power from the power system 80 when a current exceeding a predetermined current (current based on power determined by a contract with the power company) flows from the power system 80.

  Further, the power measuring device 20 includes a plurality of branch breakers 22 corresponding to the plurality of branch circuits 12 branched from the main line 11. That is, the power measuring device 20 has a branch breaker 22 for each branch circuit 12. The branch breaker 22 is a breaker that stops supplying power to the branch circuit 12 when an overcurrent flows through the branch circuit 12 connected to the branch breaker 22. It is assumed that numbers are assigned in advance to the plurality of branch circuits 12 (the plurality of branch breakers 22).

  Further, the power measuring device 20 has a measuring unit 25. The measurement unit 25 includes a CT (Current Transformer) provided for each branch circuit 12 and measures the power consumption (current amount) for each branch circuit 12 branched from the trunk line 11 by CT. For example, when one electrical device 23 is connected to the branch circuit 12, the measurement unit 25 can measure the power consumption of this one electrical device 23. More specifically, the electrical device 23 is connected to the branch circuit 12 via an outlet (not shown in FIG. 1).

  Specifically, the measurement unit 25 is realized by the CT and a processor, a microcomputer, a dedicated circuit, or the like. Note that the measurement unit 25 is not limited to a configuration having a CT, and may include, for example, a Rogowski circuit or a GMR (Giant Magnetic Resistance) element.

  Although not shown, the power measuring device 20 includes a communication module (communication circuit) for performing wireless communication with the energy management device 30 and can wirelessly communicate with the energy management device 30. Specifically, the power measuring device 20 transmits the power consumption for each branch circuit 12 to the energy management device 30 by wireless communication. Note that the wireless communication method (communication standard) is, for example, a specific low-power wireless using a frequency of 920 MHz band, but ZigBee (registered trademark), Bluetooth (registered trademark), wireless LAN (Local Area Network), or the like. Other schemes may be used.

  In addition, the specific aspect of the electric power measurement apparatus 20 is not specifically limited, The electric power measurement apparatus 20 should just measure the amount of power consumption for every branch circuit 12. FIG. For example, the power measurement device 20 may be realized as a device (measurement unit) separate from the distribution board. Further, the power measuring device 20 may be, for example, a smart meter (a watt-hour meter having a communication function).

[Energy management equipment]
The energy management device 30 is a device that manages the amount of power consumed by the consumer 5 (the amount of power consumed by the measuring unit 25). Specifically, the energy management device 30 includes a first communication unit 31, a storage unit 32, an information processing unit 33, a timer unit 37, and a second communication unit 38.

  The 1st communication part 31 is an example of a 1st acquisition part, Comprising: The electric power consumption in the consumer 5 measured by the electric power measurement apparatus 20 (measurement part 25) is acquired from the electric power measurement apparatus 20. FIG. The power consumption is acquired in such a manner that the power consumption for each branch circuit 12 can be distinguished (recognized). For example, information in which the number of the branch circuit 12 is associated with the power consumption of the branch circuit 12 is acquired as the power consumption. In other words, the first communication unit 31 acquires the power consumption for each branch circuit 12 in the customer 5.

  For example, the first communication unit 31 acquires the power consumption in real time, but may be acquired collectively in a regular manner. Specifically, the first communication unit 31 may acquire the power consumption for the latest two hours every two hours. Specifically, the first communication unit 31 is a communication module (communication circuit) for wireless communication that can communicate with the power measurement device 20.

  The storage unit 32 stores the power consumption acquired by the first communication unit 31 in association with the date and time (time stamp) when the power consumption was measured. The power consumption may be given a date and time in the power measuring device 20, or may be given a date and time by the information processing unit 33 of the energy management device 30. When the energy management device 30 gives the date and time to the power consumption, the timer unit 37 is used. In addition, the power consumption stored in the storage unit 32 can be distinguished for each branch circuit 12. The storage of the power consumption amount in the storage unit 32 is performed by the information processing unit 33.

  The storage unit 32 stores the names of the plurality of branch circuits 12 provided in the customer 5. FIG. 3 is a diagram illustrating an example of names of the plurality of branch circuits 12 stored in the storage unit 32.

  As described above, each of the plurality of branch circuits 12 is assigned a number, and the storage unit 32 has, for example, information indicating the correspondence between the number of the branch circuit 12 and the name (as shown in FIG. 3). Table information) is stored. The name of the branch circuit 12 is set by the user through the input receiving unit 52 of the display device 50, for example.

  In addition, the storage unit 32 stores a control program executed by the information processing unit 33. Specifically, the storage unit 32 is a storage device such as a semiconductor memory. Note that a storage device separate from the energy management device 30 such as a server may be used as the storage unit 32.

  The 2nd communication part 38 is an example of a 2nd acquisition part, Comprising: The target value of the power consumption of the consumer 5 in a 1st period or the target value of the electricity bill of the consumer 5 in a 1st period is displayed on the display apparatus 50. Get from. In the present embodiment, the first period is one month (one month), but may be one week, and is not particularly limited.

  The second communication unit 38 is an example of an output unit, and outputs display information for displaying an image showing the branch circuit 12 considered to have room for power saving based on the control of the information processing unit 33. .

  Specifically, the second communication unit 38 is a communication module (communication circuit) that performs communication using a wireless LAN, but may be a communication module that uses other communication methods. When the communication method of the first communication unit 31 and the communication method of the second communication unit 38 are the same, the first communication unit 31 and the second communication unit 38 may be realized as one communication module. Good. When the second communication unit 38 performs communication using a wireless LAN, a wireless LAN router (not shown) is interposed between the second communication unit 38 and the third communication unit 53.

  The information processing unit 33 extracts the branch circuit 12 considered to have room for power saving, and transmits display information for displaying an image showing the branch circuit 12 using the second communication unit 38. In addition, the information processing unit 33 stores the power consumption acquired by the first communication unit 31 in the storage unit 32. Specifically, the information processing unit 33 is realized by a processor, a microcomputer, or a dedicated circuit. The information processing unit 33 includes a calculation unit 34, a determination unit 35, and an extraction unit 36.

  The calculation unit 34 calculates a daily target power consumption amount for the first period to achieve the target value acquired by the second communication unit 38. When the acquired target value is an electricity charge, conversion of the electricity charge into the power consumption or conversion of the power consumption into the electricity charge is performed. A method for calculating the daily target power consumption will be described later.

  The determination unit 35 determines whether or not the first cumulative value of power consumption from the start of the first period to the middle exceeds the second cumulative value of daily target power consumption from the start of the first period to the middle of the first period. Determine whether. For example, the determination unit 35 compares the first cumulative value and the second cumulative value at 15:00 every day, and determines whether or not the first cumulative value exceeds the second cumulative value.

  The extraction unit 36 distinguishes the power consumption acquired by the first communication unit 31 into a base power consumption and a non-base power consumption for each branch circuit 12 provided in the consumer 5. FIG. 4 is a diagram illustrating an example of the base power consumption and the non-base power consumption. In FIG. 4, the base power consumption and the non-base power consumption in the living branch circuit 12 are illustrated.

  Here, the base power consumption is based on the user's intentional operation such as the amount of power that the refrigerator is constantly consuming, the amount of standby power of the hard disk recorder, and the amount of power that is used for 24-hour ventilation of the house. It is the power consumption estimated to be irrelevant. In other words, the base power consumption is a power consumption that is estimated to occur constantly even when the user 5 is not actively operating the electrical device 23 in the consumer 5.

  On the other hand, the non-base power consumption is a power consumption that changes more with time than the base power consumption, and is a power consumption other than the base power consumption. In other words, the non-base power consumption is a power consumption generated when the user intentionally operates the electric device 23, and is a power consumption obtained by subtracting the base power consumption from the power consumption.

  For example, the extraction unit 36 obtains the minimum value of the comparison value in a range that satisfies the condition that the time during which the power consumption continues to be equal to or less than the comparison value exceeds a predetermined maintenance time, The peak value of. That is, the peak value of the base power consumption amount in the target period is the smallest comparison value among the comparison values that satisfy the condition that the power consumption amount in the target period is equal to or longer than the predetermined period and not longer than the comparison value. It is.

  For example, when the peak value of the base power consumption is calculated every day (24 hours), the peak value of the base power consumption is a predetermined period (for example, 3 hours) in which the power consumption is 24 hours or less per day. ) The smallest comparison value among the comparison values that satisfy the condition that the value is equal to or less than the comparison value.

  In a time zone in which the power consumption amount is smaller than the peak value during the target period, the power consumption amount in the time zone becomes the base power consumption amount. In addition, in a time period during which the power consumption amount is equal to or higher than the peak value during the target period, the peak value is the base power consumption amount.

  Details of such a calculation method of the base power consumption are described in Patent Document 2, and detailed description thereof is omitted.

  As shown in FIG. 4, the peak value becomes the base power consumption amount in a time zone in which the power consumption amount is larger than the peak value of the base power consumption amount. When the base power consumption is calculated every day (24 hours), as shown in FIG. 4, the power consumption and the base consumption are consumed in a time zone where the power consumption is equal to or less than the peak value of the base power consumption. The amount of power becomes equal, and the base power consumption is smaller than the peak value.

  The extraction unit 36 extracts the branch circuit 12 when the determination unit 35 determines that the first cumulative value exceeds the second cumulative value. Specifically, the extraction unit 36 includes the branch circuit 12 in which the base power consumption in the second period is greater than the past base power consumption (before the second period), and the non-base power consumption in the second period. At least one of the branch circuits 12 whose amount is larger than the past non-base power consumption is extracted. Such extraction of the branch circuit 12 is performed based on the power consumption stored in the storage unit 32 (power consumption for each branch circuit 12).

  Here, the second period is a period near the time when the first cumulative value exceeds the second cumulative value, for example, a period of 24 hours. The second period is a period shorter than the first period and included in the first period. FIG. 5 is a diagram for explaining the second period.

  As shown in FIG. 5, when it is determined that the first cumulative value exceeds the second cumulative value at 15:00 on the 24th of a certain month, the second period is, for example, shown in FIG. Thus, it is 24 hours from 15:00 on the 24th to 15:00 on the next 25th. 5B, the second period may be 24 hours from 15:00 on the 23rd to 15:00 on the next 24th. Further, as shown in FIG. 5C, the second period may be set to 24 hours from 0 o'clock to 24 o'clock on the day (24th day) determined to have exceeded.

  Thus, in the period around the time when the first cumulative value exceeds the second cumulative value, the period including the time when the first cumulative value exceeds the second cumulative value and the first cumulative value is the second cumulative value. And a period starting from or exceeding the time.

  For example, a threshold value is used for extraction of the branch circuit 12. For example, the extraction unit 36 includes the branch circuit 12 in which the base power consumption in the second period is greater than the past base power consumption by the first threshold or more, and the non-base power consumption in the second period is the past non-base consumption. The branch circuit 12 that is greater than the power amount by a second threshold or more is extracted. The first threshold value and the second threshold value are, for example, values larger than 0 and are determined empirically or experimentally such as 0.5 kWh. The first threshold value and the second threshold value may be the same value or different values.

  After extracting the branch circuit 12, the extraction unit 36 displays an image indicating information indicating the extracted branch circuit 12 and a time zone in which the branch circuit 12 has a relatively large amount of power consumption within the second period. Generate display information.

  As the information indicating the extracted branch circuit 12, the name of the branch circuit 12 stored in the storage unit 32 is used. That is, the image shows the name of the branch circuit 12 as information indicating the branch circuit 12 extracted by the extraction unit 36. Information other than the name such as a number given to the extracted branch circuit 12 may be used as information indicating the extracted branch circuit 12.

  The time period in which the power consumption is relatively large within the second period is specified by referring to the power consumption for each branch circuit 12 stored in the storage unit 32. For example, the extraction unit 36 divides the power consumption amount in the second period into time zones of 0.5 hours, and determines whether the power consumption amount is larger than the same time period in the past for each divided time zone. To do. For example, a time zone in which the amount of power consumption is greater than in the past can be set as a time zone in which the power consumption amount is relatively large within the second period.

  In addition, the extraction unit 36 may divide the power consumption amount in the second period into 0.5 hours, and set the period with the largest power consumption amount in the second period as a time zone with a relatively large power consumption amount. Moreover, the extraction part 36 is good also considering a time slot | zone with much power consumption as compared with the average value in a 2nd period as a time slot | zone with comparatively much power consumption among 2nd periods.

  The display information generated in this way is output by the second communication unit 38 after the second period during the first period (until the end of a month) and displayed on the display unit 51.

  The details of the operation performed by each component included in the information processing unit 33 described above will be described later.

  The time measuring unit 37 is a time measuring device that measures the current date and time (including date). The information processing unit 33 uses the time measuring unit 37 to grasp the current date and time. In addition, the information processing unit 33 specifies the second period using the time measuring unit 37. Further, as described above, the information processing unit 33 may store the power consumption amount in association with the date and time in the storage unit 32 using the time measuring unit 37. The timer 37 is specifically a real-time clock IC or the like, but may be in any form.

[Display device]
The display device 50 displays an image based on the display information output from the energy management device 30. The display device 50 is specifically a personal computer, for example, but may be a television, a smartphone, or a tablet terminal. The display device 50 may be a dedicated display device corresponding to the energy management device 30. The display device 50 includes a third communication unit 53, a display control unit 54, a display unit 51, and an input reception unit 52.

  The third communication unit 53 communicates with the second communication unit 38 of the energy management device 30. For example, the third communication unit 53 receives display information from the second communication unit 38. The third communication unit 53 transmits the target value input through the input receiving unit 52 to the second communication unit 38.

  Specifically, the third communication unit 53 is a communication module (communication circuit) that performs communication using a wireless LAN, as long as it can communicate with the second communication unit 38. Therefore, the third communication unit 53 may be a communication module using another communication method corresponding to the second communication unit 38.

  The display unit 51 displays an image according to the control of the display control unit 54. Specifically, the display unit 51 is realized by a liquid crystal panel, an organic EL panel, or the like.

  The display control unit 54 causes the display unit 51 to display an image based on the display information received by the third communication unit 53. Specifically, the display control unit 54 is realized by a processor, a microcomputer, or a dedicated circuit. FIG. 6 is a diagram illustrating an example of an image displayed on the display unit 51.

  As shown in FIG. 6, the image displayed on the display unit 51 shows information indicating the branch circuit 12 extracted by the extraction unit 36. In the example of FIG. 6, the image displayed on the display unit 51 indicates the name of the branch circuit 12 (“circuit name” in FIG. 6) as information indicating the branch circuit 12. Specifically, the name of the branch circuit 12 is an air conditioner, a kitchen, and a living room.

  In the example of FIG. 6, the branch circuit 12 extracted based on the fact that the non-base power consumption is larger than the past is the branch circuit 12 of the air conditioner and the branch circuit 12 of the kitchen. The image displayed on the display unit 51 indicates a time zone in which the power consumption is relatively large in the second period in these branch circuits 12 (“used time zone” in FIG. 6). In the example of FIG. 6, the branch circuit 12 of the air conditioner has a relatively large amount of power consumption in the time period from 14:00 to 16:00 in the day that is the second period. The amount of power consumption is relatively large in the time zone from 19:00 to 19:00.

  On the other hand, the branch circuit 12 in the living room is a branch circuit 12 extracted based on the fact that the base power consumption is higher than in the past. As described above, the base power consumption is a power consumption that is estimated to be generated steadily, and the branch circuit 12 that has a higher base power consumption than the past has a higher power consumption in a specific time zone. That's not true. For this reason, for the branch circuit 12 in the living room, “all day” is displayed as a time zone in which the power consumption is relatively large.

  In addition, the image shown in FIG. 6 shows yesterday's goal achievement level. The target achievement level of yesterday is obtained by dividing the total amount of power consumption of yesterday by the daily target power consumption of yesterday.

  Also, the image shown in FIG. 6 shows the target achievement level for this month. The target achievement level for this month is obtained by dividing the cumulative value of power consumption until yesterday by the cumulative value of daily target power consumption until yesterday.

  Further, the image shown in FIG. 6 shows how much power consumption of each branch circuit 12 occupies with respect to the power consumption exceeding the target value (“Most used power” in FIG. 6). Ratio ").

  From such an image, the user can know, through the display unit 51, the branch circuit 12 that consumes more power than in the past and the time zone that consumes more power. In other words, the user can know the branch circuit 12 and time zone in which there is room for power saving. By suppressing the power consumption of the branch circuit 12 with room for power saving based on such an image, the user can achieve the target value of the power consumption or the target value of the electricity bill.

  The input receiving unit 52 is a user interface for the user to input a target value, set the name of the branch circuit 12, and the like. The target value here is the target value of the power consumption amount of the consumer 5 in the first period or the target value of the electricity charge of the consumer 5 in the first period. Specifically, when the display device 50 is a personal computer, the input receiving unit 52 is a keyboard, a mouse, or the like, but the specific mode of the input receiving unit 52 is not particularly limited. For example, when the display device 50 is a smartphone or a tablet terminal, the input reception unit 52 is a GUI (Graphical User Interface) including a touch panel.

[Determining whether or not the first cumulative value exceeds the second cumulative value]
Next, a determination process for determining whether or not the first cumulative value exceeds the second cumulative value (hereinafter simply referred to as a determination process) will be described. FIG. 7 is a flowchart of the determination process of the energy management device 30.

  The 1st communication part 31 of the energy management apparatus 30 acquires the power consumption in the consumer 5 measured by the electric power measurement apparatus 20 (measurement part 25) (S11). For example, the first communication unit 31 acquires the power consumption amount in real time, but the power consumption amount may be acquired periodically. The storage unit 32 stores the power consumption acquired by the first communication unit 31 in association with the date and time when the power consumption was measured. Note that the storage of the power consumption amount in the storage unit 32 is performed by the information processing unit 33.

  On the other hand, the second communication unit 38 of the energy management device 30 sets the target value of the power consumption amount of the consumer 5 in the first period of the display device 50 or the target value of the electricity charge of the consumer 5 in the first period. Obtain (receive) from the communication unit 53 (S12). The input of the target value is performed by the user and received by the input receiving unit 52. The acceptance of the target value is received once at the beginning of every month, for example. The target value may be changed during the month.

  Next, the calculation unit 34 calculates the daily target power consumption for the first period to achieve the acquired target value (S13). FIG. 8 is a diagram for explaining a method of calculating the daily target power consumption. FIG. 8 is a diagram simulating a calendar, where one cell represents one day. The number in one square shows the power consumption of the day.

  For example, it is assumed that the past daily power consumption results are stored in the storage unit 32 for two weeks ((a) of FIG. 8). At this time, the calculation unit 34 first calculates the average value of the power consumption for each day of the week ((b) of FIG. 8). Next, the calculation unit 34 calculates a predicted value of the power consumption amount in the first period (current month), assuming that the power consumption amount in each day of the week included in the first period is the average value of the day of the week (FIG. 8). (C)).

In the example of FIG. 8, the first period includes Monday 4th, Tuesday 4th, Wednesday 4th, Thursday 4th, Friday 5th, Saturday 5th, and Sunday 5th. Then, the power consumption for the current month can be calculated by the following formula. In the following formula, the average power consumption for one day of each day from Monday to Sunday is expressed as W _mon , W _tue , W _wed , W _thurs , W _fri , W _sat , W _sun , respectively. Is done.

_{W mon × 4 + W tue ×} 4 + W wed × 4 + W thurs × 4
+ W _fri × 5 + W _sat × 5 + W _sun × 5
The predicted value of the power consumption for the first period (current month) obtained based on the above formula is specifically 435 kWh. Here, if the target value of power consumption in the first period acquired in step S12 is 348 kWh, in order to achieve the target value of power consumption in the first period, It is necessary to multiply the predicted value of power consumption by 348 / 435≈0.8. That is, the daily target power consumption in the first period is calculated by multiplying the predicted value of the power consumption per day in the first period by 0.8 ((d) in FIG. 8).

  In step S12, it is assumed that 8000 yen is acquired as the target value of the electricity bill in the first period. In this case, the same result can be obtained by converting the predicted value of the power consumption amount in the first period into the electricity bill. When the electricity rate is 23 yen / kWh, the predicted value of the electricity rate for the first period is 435 kWh × (23 yen / kWh) = 10005 yen. Therefore, in order to achieve the target value of power consumption in the first period, it is required that the predicted value of power consumption per day in the first period needs to be multiplied by 8000 / 10005≈0.8. The same result can be obtained even if the target value of 8000 yen is converted into the power consumption. Information indicating an electricity bill such as 23 yen / kWh is stored in advance in the storage unit 32, for example.

  Next, the determination unit 35 calculates a first cumulative value of power consumption from the start of the first period to the middle (S14), and daily target power consumption from the start of the first period to the middle. A second cumulative value is calculated (S15). Then, the determination unit 35 determines whether or not the calculated first cumulative value exceeds the calculated second cumulative value (S16).

  This determination is performed, for example, every predetermined period during the first period. Specifically, the predetermined period is 24 hours. In this case, the determination is performed once a day. FIG. 9 is a diagram for explaining determination by the determination unit 35.

  The determination unit 35 calculates a first cumulative value of power consumption from the start time of the first period to the present and a second cumulative value of daily target power consumption from the start time of the first period to the present. To do. As shown in FIG. 9, for example, when the determination is performed on the 24th of a certain month, the determination unit 35 determines the first cumulative value of the power consumption from the 1st to the 24th of the current month (the line graph in FIG. 9). And the second cumulative value (the bar graph in FIG. 9) of the target power consumption for each day from the 1st to the 24th of the current month. Then, the determination unit 35 determines whether or not the calculated first cumulative value exceeds the calculated second cumulative value.

  If the determination is performed every day at 15:00, the determination unit 35 determines the first cumulative value of the power consumption from 1st to 24th of the current month and the daily target from the 1st to 24th of the current month. A second cumulative value of power consumption is calculated. Then, the determination unit 35 determines whether or not the calculated first cumulative value exceeds the calculated second cumulative value. At this time, of the second cumulative value, the daily target power consumption for 24 days is the predicted value until 15:00 (for example, the daily target power consumption for 24 days × (15/24)). May be used. When the determination is made on the 24th, the cumulative value from the 1st to the 23rd of the current month (the day before the 24th) may be calculated without considering the power consumption for 24 days.

  When the determination unit 35 determines that the first cumulative value exceeds the second cumulative value (Yes in S16), the information processing unit 33 performs display information output processing (S17). When the determination unit 35 determines that the first cumulative value does not exceed the second cumulative value (No in S16), the display information output process by the information processing unit 33 is not performed, and the determination process ends.

[Display information output processing]
Next, display information output processing will be described. FIG. 10 is a flowchart of the display information output process.

  First, the extraction unit 36 calculates the power consumption amount (the power consumption amount acquired by the first communication unit 31) stored in the storage unit 32 for each branch circuit 12, the base power consumption amount and the non-base power consumption amount. (S21). As described above, the non-base power consumption is a power consumption whose change with time is larger than the base power consumption, and is a power consumption other than the base power consumption.

  Next, the extraction unit 36 extracts the branch circuit 12 in which the base power consumption in the second period near the time when the first cumulative value exceeds the second cumulative value is larger than the past base power consumption (S22). ). Specifically, the extraction unit 36 extracts the branch circuit 12 in which the base power consumption amount in the second period is larger than the past base power consumption amount by a first threshold or more.

  When the second period is one day, the extraction unit 36 divides, for example, the average value of the base power consumption per day in the month immediately before the second period and the base power consumption in the second period. Comparison is made for each circuit 12. Then, the extraction unit 36 extracts the branch circuit 12 whose average value is larger than the base power consumption amount in the second period by a first threshold or more.

  Note that the day of the week may be taken into account in the calculation of the average value. For example, when the second period is Tuesday, the average value of the base power consumption per day on Tuesday included in the most recent month and the base power consumption in the second period are determined for each branch circuit 12. May be compared. The period for calculating the average value is not limited to one month immediately before the second period, but may be a predetermined period in the past than the second period and longer than the second period.

  Next, the extraction unit 36 extracts the branch circuit 12 in which the non-base power consumption in the second period is larger than the past non-base power consumption (S23). Specifically, the extraction unit 36 extracts the branch circuit 12 in which the non-base power consumption amount in the second period is greater than the past non-base power consumption amount by a second threshold or more.

  When the second period is one day, the extraction unit 36, for example, calculates the average value of the non-base power consumption per day for one month immediately before the second period and the non-base power consumption in the second period. Are compared for each branch circuit 12. Then, the extraction unit 36 extracts the branch circuit 12 whose average value is greater than the non-base power consumption amount in the second period by a second threshold or more. Note that the day of the week may be taken into account in the calculation of the average value.

  Next, the extraction unit 36 generates display information regarding the extracted branch circuit 12 (S24). The display information related to the extracted branch circuit 12 is, in other words, information indicating the branch circuit 12 extracted by the extraction unit 36 and a time zone in which the extracted power is consumed in the second period in the second period. This is display information for displaying an image indicating.

  The information indicating the extracted branch circuit 12 is specifically the name of the branch circuit 12 and is specified by referring to the storage unit 32. In the extracted branch circuit 12, a time zone in which the power consumption is relatively large within the second period is specified by referring to the power consumption (power consumption for each branch circuit 12) stored in the storage unit 32. The

  The extraction of the branch circuit 12 is performed after the power consumption amount during the second period is acquired. Therefore, for example, when the second period ends after the determination as shown in FIG. 5A or 5C, the extraction of the branch circuit 12 is performed after the determination and after the second period elapses. Is done.

  And the 2nd communication part 38 outputs the produced | generated display information to the display apparatus 50 (3rd communication part 53) based on control of the information processing part 33 (S25). The display information is output during the first period (before the first period expires). As a result, an image as shown in FIG. 6 is displayed on the display unit 51 of the display device 50.

  From such an image, the user can know, through the display unit 51, the branch circuit 12 that consumes more power than in the past and the time zone that consumes more power. Based on such an image, the user can achieve the target value of the power consumption or the target value of the electricity bill by suppressing the power consumption of the branch circuit 12 that consumes more power than in the past.

  Note that the image shown in FIG. 6 further shows yesterday's goal achievement level, this month's goal achievement level, and the like.

[Modification]
The image shown in FIG. 6 is an example. The image displayed on the display unit 51 only needs to indicate at least information indicating the branch circuit 12 extracted by the extraction unit 36 and a time zone in which the power consumption is relatively large in the second period in the branch circuit 12. . FIG. 11 is a diagram illustrating another example of an image displayed on the display unit 51.

  Also in the image shown in FIG. 11, as in the image shown in FIG. 6, the name of the branch circuit 12 extracted by the extraction unit 36 and the time during which the power consumption is relatively large in the second period in the branch circuit 12. A band (“overused time” in FIG. 11) is shown.

  Here, in the image shown in FIG. 11, three branch circuits 12 are shown in descending order of the difference in power consumption with respect to the past. That is, the extraction unit 36 extracts the three branch circuits 12 in descending order of power consumption amount with respect to the past. As described above, the extraction unit 36 determines whether the base circuit power consumption in the second period is larger than the past base power consumption or the non-base power consumption in the second period is the past non-base power consumption. A greater number of branch circuits 12 may be extracted in descending order of the power consumption difference with respect to the past. In other words, the threshold value as described in the above embodiment may not be used for the extraction of the branch circuit 12.

  When a predetermined number of branch circuits 12 are extracted in descending order of the difference in power consumption relative to the past, in determining whether the difference is large or small, whether the branch circuit 12 is a branch circuit 12 having a larger base power consumption than in the past or non-base consumption. It is not distinguished whether the branch circuit 12 has a larger amount of power than the past. Therefore, even when only a predetermined number of branch circuits 12 whose base power consumption is higher than the past are extracted, only a predetermined number of branch circuits 12 whose non-base power consumption is higher than the past non-base power consumption is extracted. It may be possible. Further, one branch circuit 12 is extracted as a branch circuit 12 having a larger base power consumption than in the past, and is also extracted as a branch circuit 12 having a larger non-base power consumption than in the past (two It may be extracted as the branch circuit 12).

  Further, the image shown in FIG. 11 further shows, as a percentage, how much power is consumed by the branch circuit 12 extracted by the extraction unit 36 compared to the past. The image shown in FIG. 11 specifically shows that the branch circuit 12 of the air conditioner has increased by 20% with respect to the past. Such a percentage is, for example, an average of the base power consumption in the second period of the extracted branch circuit 12 and the non-base power consumption per day in the month immediately before the second period of the branch circuit 12. It is obtained by dividing the difference from the value by the average value.

  With such an image, the user can recognize how much power consumption of the branch circuit 12 indicated by the image has increased with respect to the past. In the image, instead of the percentage, a difference [kWh] in power consumption with respect to the past may be indicated.

[Effects]
As described above, the energy management device 30 is an energy management device that manages the power consumption of the customer 5. The energy management apparatus 30 includes a first communication unit 31 that acquires the power consumption amount of the consumer 5 and a target value of the power consumption amount of the consumer 5 in the first period or a target of the electricity rate of the consumer 5 in the first period. And a second communication unit 38 for acquiring a value. The first communication unit 31 is an example of a first acquisition unit, and the second communication unit 38 is an example of a second acquisition unit.

  The energy management device 30 includes a calculation unit 34 that calculates a daily target power consumption amount in the first period for achieving the acquired target value. Whether the energy management device 30 has exceeded the first cumulative value of the power consumption from the start of the first period to the middle of the first target power consumption by day from the start of the first period to the middle of the first period. The determination part 35 which determines whether or not, and the extraction part 36 are provided. The energy management device 30 displays information for displaying the information indicating the branch circuit 12 extracted by the extraction unit 36 and an image indicating a time zone in which the power consumption is relatively large in the second period in the branch circuit 12. Are provided during the first period. The second communication unit 38 is an example of an output unit.

  For each branch circuit 12 provided in the consumer 5, the extraction unit 36 calculates the base power consumption amount and the power consumption amount that changes more with time than the base power consumption amount. And non-base power consumption, which is power consumption other than base power consumption. The extraction unit 36 extracts the branch circuit 12 when the determination unit 35 determines that the first cumulative value exceeds the second cumulative value. Specifically, the extraction unit 36 includes the branch circuit 12 in which the base power consumption in the second period near the time when the first cumulative value exceeds the second cumulative value is greater than the past base power consumption, and the first At least one of the branch circuits 12 in which the non-base power consumption in the two periods is larger than the past non-base power consumption is extracted.

  From the image as described above, the user can know, through the display unit 51, the branch circuit 12 that consumes more power than in the past and the time zone that consumes more power. Based on such an image, the user can achieve the target value of the power consumption or the target value of the electricity bill by suppressing the power consumption of the branch circuit 12 that consumes more power than in the past. In other words, the energy management device 30 can provide the user with information (image) for achieving the target value of the power consumption or the target value of the electricity bill.

  The image may further indicate how much power is consumed by the branch circuit 12 extracted by the extraction unit 36 compared to the past.

  With such an image, the user can know how much power consumption of the extracted branch circuit 12 is larger than the past through the display unit 51. In other words, the energy management apparatus 30 can provide the user with an image showing how much power the amount of power consumption of the extracted branch circuit 12 is compared to the past.

  The energy management apparatus 30 further includes a storage unit 32 in which names of a plurality of branch circuits 12 provided in the customer 5 are stored, and the image is information indicating the branch circuit 12 extracted by the extraction unit 36. The name of the branch circuit 12 may be indicated as

  From such an image, the user can know the name of the branch circuit 12 extracted by the extraction unit 36. In other words, the energy management device 30 can provide the name of the extracted branch circuit 12 to the user.

  In addition, the extraction unit 36 includes the branch circuit 12 in which the base power consumption in the second period is greater than the past base power consumption by the first threshold or more, and the non-base power consumption in the second period is the past non-base consumption. You may extract the branch circuit 12 larger than a 2nd threshold value more than electric energy.

  Thereby, the energy management apparatus 30 can provide the user with an image showing the branch circuit 12 that consumes more power than the threshold in the past.

  Further, the extraction unit 36 has the branch circuit 12 in which the base power consumption in the second period is larger than the past base power consumption, or the non-base power consumption in the second period is larger than the past non-base power consumption. A predetermined number of branch circuits 12 may be extracted in descending order of power consumption amount with respect to the past.

  Thereby, the energy management apparatus 30 can provide the user with an image showing the branch circuit 12 having a particularly large amount of power consumption compared to the past.

  In addition, the peak value of the base power consumption amount in the second period is the highest of the comparison values that satisfy the condition that the power consumption amount in the second period is not less than the predetermined period of the second period or less and not more than the comparison value. It may be a small comparison value. During the second period, the base power consumption in the time period in which the power consumption is smaller than the peak value is equal to the power consumption in the time period, and the power consumption in the second period is equal to or greater than the peak value. The base power consumption amount in the time zone may be equal to the peak value.

  Thus, the base power consumption can be calculated using the comparison value.

  In the above embodiment, the display device 50 separate from the energy management device 30 includes the display unit 51, but the energy management device 30 may include a display unit. That is, the energy management device 30 may further include a display unit that displays an image based on the display information output by the second communication unit 38 (output unit).

  Thereby, the energy management apparatus 30 can provide an image to a user as information for achieving the target value of power consumption or the target value of electricity charges.

(Other embodiments)
Although the energy management system and the energy management apparatus according to the embodiments have been described above, the present invention is not limited to the above embodiments.

  The communication method between apparatuses described in the above embodiment is an example. The communication method between apparatuses is not particularly limited. For example, instead of wireless communication, wired communication such as power line communication (PLC: Power Line Communication) or communication using a wired LAN may be performed between apparatuses.

  In addition, the distribution of the components to the devices in the above embodiment is an example. For example, the power measurement device and the energy management device are separate devices, but may be a single device. That is, the power measurement device may have each component included in the energy management device.

  The display device and the energy management device may be a single device. That is, the energy management device may have each component included in the display device. For example, the energy management apparatus may include a display unit.

  Further, for example, the energy management apparatus may be realized as a server provided outside the consumer. In this case, the energy management apparatus can also output (distribute) display information to each of a plurality of consumers.

  In the above-described embodiment, each component may be configured by dedicated hardware or may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.

  Each component may be a circuit (or an integrated circuit). These circuits may constitute one circuit as a whole, or may be separate circuits. Each of these circuits may be a general-purpose circuit or a dedicated circuit.

  The general or specific aspect of the present invention may be realized by a recording medium such as a system, an apparatus, a method, an integrated circuit, a computer program, or a computer-readable CD-ROM. Further, the present invention may be realized by any combination of a system, apparatus, method, integrated circuit, computer program, and recording medium. For example, the present invention may be realized as the energy management system, or may be realized as a program for causing a computer to function as an energy management system or an energy management device. The present invention may also be realized as an information presentation method (display information output method) executed by the energy management system or the energy management device.

  Moreover, the order of the plurality of processes in the operation of the energy management apparatus described in the above embodiment is an example. The order of the plurality of processes may be changed, and the plurality of processes may be executed in parallel. In addition, another processing unit may execute a process executed by a specific processing unit.

  In addition, it is realized by variously conceiving various modifications conceived by those skilled in the art for each embodiment, or by arbitrarily combining the components and functions in each embodiment without departing from the spirit of the present invention. This form is also included in the present invention.

5 Customer 12 Branch circuit 30 Energy management device 31 First communication unit (first acquisition unit)
34 Calculation unit 35 Determination unit 36 Extraction unit 38 Second communication unit (second acquisition unit, output unit)
51 Display section

Claims (8)

An energy management device for managing power consumption in a consumer,
A first acquisition unit for acquiring power consumption in the consumer;
A second acquisition unit that acquires a target value of the power consumption amount of the consumer in the first period or a target value of the electricity charge of the consumer in the first period;
A calculation unit for calculating a daily target power consumption amount in the first period for achieving the acquired target value;
Whether the first cumulative value of the power consumption from the start of the first period to the middle exceeds the second cumulative value of the daily target power consumption from the start of the first period to the middle A determination unit for determining;
The acquired power consumption is, for each branch circuit provided in the consumer, a base power consumption, and a power consumption whose change over time is larger than the base power consumption, and the base power consumption When the determination unit determines that the first cumulative value exceeds the second cumulative value, the first cumulative value is determined as the first cumulative value. A branch circuit in which the base power consumption in the second period near the time exceeding the two cumulative values is greater than the past base power consumption, and the non-base power consumption in the second period is the past non-base power consumption An extraction unit for extracting at least one of more branch circuits;
Display information for displaying an image indicating the branch circuit extracted by the extraction unit and an image indicating a time zone in which the power consumption is relatively large in the second period in the branch circuit, during the first period An output unit for outputting to
Energy management device. The image further shows how much power consumption of the branch circuit extracted by the extraction unit compared to the past,
The energy management apparatus according to claim 1. And a storage unit storing names of a plurality of branch circuits provided in the consumer,
The image shows the name of the branch circuit as information indicating the branch circuit extracted by the extraction unit.
The energy management apparatus according to claim 1 or 2. The extraction unit includes a branch circuit in which the base power consumption in the second period is greater than the past base power consumption by a first threshold or more, and the non-base power consumption in the second period is the past non-base power consumption. Extracting a branch circuit that is greater than the amount by a second threshold or more,
The energy management apparatus of any one of Claims 1-3. The extraction unit is a branch circuit in which the base power consumption in the second period is greater than the past base power consumption, or the non-base power consumption in the second period is greater than the past non-base power consumption. Extract a predetermined number of branch circuits in descending order of power consumption difference with respect to the past.
The energy management apparatus of any one of Claims 1-4. The peak value of the base power consumption amount in the second period is a comparison value that satisfies the condition that the power consumption amount in the second period is equal to or longer than the predetermined period of the second period or less and equal to or less than the comparison value The smallest comparison value,
During the second period, the base power consumption in a time zone in which the power consumption is smaller than the peak value is equal to the power consumption in the time zone,
The energy management device according to any one of claims 1 to 5, wherein a base power consumption amount in a time zone in which the power consumption amount is equal to or greater than the peak value during the second period is equal to the peak value. And a display unit that displays the image based on display information output by the output unit.
The energy management apparatus of any one of Claims 1-6.   The program for functioning a computer as an energy management apparatus of any one of Claims 1-7.

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