JP6504374B2 - Power management device and program - Google Patents

Description

  The present invention relates to a power management device and a program.

  2. Description of the Related Art In recent years, energy management systems such as home energy management systems (HEMS) have attracted attention with the trend of stabilization of power systems and liberalization of power markets.

  In addition, in a system such as HEMS, there is known a technology for providing a user with power saving advice. For example, Patent Document 1 discloses a power saving support system that displays predetermined advice according to the degree of achievement of a power saving target.

JP, 2014-207751, A

  In the power saving support system described in Patent Document 1, the power saving target is input by the user. In this case, the power saving target is far from the actual value, and there is a possibility that appropriate advice can not be presented.

  The present invention provides a power management apparatus capable of appropriately determining a target value of power consumption.

  In the power management apparatus according to an aspect of the present invention, an acquisition unit for acquiring the power consumption of the customer, which is measured by the measuring device, and the power consumption acquired by the acquisition unit are measured for the power consumption. A storage unit stored in association with the stored date, an estimation unit for estimating the power consumption in a target period using the power consumption stored in the storage unit, and the power consumption estimated by the estimation unit And a determination unit that determines the amount as a target value of power consumption in the target period.

  According to the present invention, it is possible to appropriately determine the target value of power consumption.

FIG. 1 is a block diagram showing the configuration of the power management system according to the first embodiment. FIG. 2 is an external view of devices constituting the power management system according to the first embodiment. FIG. 3 is a diagram showing an example of an image displayed on the display unit. FIG. 4 is a view showing another example of the image displayed on the display unit. FIG. 5 is a flowchart of the operation of the power management apparatus according to the first embodiment. FIG. 6 is a flowchart of a first determination example of the target value. FIG. 7 is a flowchart of the example 2 of target value determination. FIG. 8 is a flowchart of the example 3 of determining the target value. FIG. 9 is a diagram illustrating an example of base power consumption and non-base power consumption. FIG. 10 is a diagram showing an example of a setting screen of target values. FIG. 11 is a flowchart of the proposal process. FIG. 12 is a diagram showing an example of a display screen which proposes to suppress the power consumption on the day when the power consumption is the largest. FIG. 13 is a diagram showing an example of a display screen which proposes to suppress the power consumption in the branch circuit with the largest non-base power consumption.

  Embodiments will be described below with reference to the drawings. The embodiments described below are all inclusive or specific examples. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, order of steps, and the like shown in the following embodiments are merely examples, and the present invention is not limited thereto. Further, among the components in the following embodiments, components not described in the independent claim indicating the highest concept are described as arbitrary components.

  Each figure is a schematic view, and is not necessarily illustrated strictly. Further, in the drawings, substantially the same configuration will be denoted by the same reference numeral, and overlapping description may be omitted or simplified.

Embodiment 1
[Entire configuration of power management system]
First, the entire configuration of the power management system according to the first embodiment will be described. FIG. 1 is a block diagram showing the configuration of the power management system according to the first embodiment. FIG. 2 is an external view of devices constituting the power management system.

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

  The power management system 10 is provided in the customer 5 and is a system for managing the usage state of the power in the customer 5. Specifically, in the power management system 10, the power management device 30 manages the amount of power consumption measured by the power measurement device 20, and the amount of power consumption is appropriately displayed on the display device 50.

  Further, in the power management system 10, a target value of power consumption is set, and when it is predicted that the power consumption exceeds the target value, a display screen prompting power saving is displayed on the display device 50. . Here, the target value of the power consumption is generally input by the user, but in the power management system 10, the power management apparatus 30 determines an appropriate target value according to the past performance. . Hereinafter, each component which comprises the power management system 10 is demonstrated.

[Power Measurement Device]
The power measurement device 20 is an example of a measurement device, and is a distribution board having a power measurement function and a wireless communication function. The power measurement device 20 has a master breaker 21 for turning on or off the power supply from the power system 80 through the trunk line 11. The master breaker 21 is a breaker that stops the supply of power from the power system 80 when the current flowing from the power system 80 exceeds a predetermined current (a current based on power defined by a contract with a power company).

  Further, the power measurement device 20 has a plurality of branch breakers 22 corresponding to each of the plurality of branch circuits 12 branched from the trunk line 11. That is, the power measurement device 20 has the branch breaker 22 for each branch circuit 12. The branch breaker 22 is a breaker that stops the supply of power to the branch circuit 12 when an overcurrent flows in the branch circuit 12 connected to the branch breaker 22. In addition, it is assumed that numbers are given to the plurality of branch circuits 12 (plural branch breakers 22) in advance.

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

  Specifically, the measurement unit 25 is realized by the above-described CT and a processor, a microcomputer, a dedicated circuit, or the like. The measuring unit 25 is not limited to a configuration having a CT, and may have, for example, a Rogowski circuit or a GMR (Giant Magnetic Resistance) element.

  Although not illustrated, the power measurement apparatus 20 includes a communication module (communication circuit) for performing wireless communication with the power management apparatus 30, and can perform wireless communication with the power management apparatus 30. Specifically, the power measurement device 20 transmits the power consumption of each branch circuit 12 to the power management device 30 by wireless communication. The wireless communication method (communication standard) is, for example, specific low power wireless communication using a 920 MHz band frequency, but ZigBee (registered trademark), Bluetooth (registered trademark), wireless LAN (Local Area Network), etc. , And may be other communication standards.

  In addition, the specific aspect of the electric power measurement apparatus 20 is not specifically limited, As long as the power consumption for every branch circuit 12 can be measured. For example, the power measurement device 20 may be realized as a device (measurement unit) different from the distribution board.

  Moreover, the power measuring device 20 only needs to be able to measure the amount of power consumption of the entire customer 5, and may be, for example, a smart meter (a power meter having a communication function). That is, it is not essential that the power measurement apparatus 20 measure the power consumption for each branch circuit 12.

[Power management device]
The power management device 30 is a device that manages the amount of power consumption measured by the measurement unit 25. The power management apparatus 30 performs control such as transmitting information for displaying the amount of power consumption on the display device 50 to the display device 50, for example. Specifically, the power management apparatus 30 includes an acquisition unit 31, a storage unit 32, a control unit 33, a first communication unit 39, and a clock unit 40.

  The acquisition unit 31 acquires the power consumption amount of the customer 5 measured by the power measurement device 20 (the measurement unit 25). For example, although the acquisition unit 31 acquires the power consumption in real time, the acquisition unit 31 may periodically acquire the power consumption. Specifically, the acquisition unit 31 may acquire the amount of power consumption for the nearest one day (24 hours) at 0 o'clock every day. Specifically, the acquisition unit 31 is a communication module (communication circuit) for wireless communication that can communicate with the power measurement apparatus 20.

  The storage unit 32 stores the power consumption acquired by the acquisition unit 31 in association with the date and time when the power consumption was measured. Here, being associated with date and time means at least associating with date. When the power consumption is acquired in real time, the power consumption is stored in association with the date and time, but as described above, the power consumption for one day is acquired collectively In this case, the power consumption is stored in association with the date.

  Storage of the power consumption amount in the storage unit 32 is performed by the control unit 33. In the first embodiment, the power consumption amount is stored in the storage unit 32 for each branch circuit, but storing in each branch circuit 12 is not essential.

  The storage unit 32 additionally stores a control program that the control unit 33 executes. Specifically, the storage unit 32 is a storage device such as a semiconductor memory.

  The control unit 33 transmits information for displaying the amount of power consumption using the first communication unit 39. Further, the control unit 33 stores the power consumption amount acquired by the acquisition unit 31 in the storage unit 32 in association with the date and time when the power consumption amount was measured. As the date and time, for example, one measured by the clock unit 40 is used. Specifically, the control unit 33 is realized by a processor, a microcomputer, or a dedicated circuit.

  In addition, the control unit 33 performs a target value determination process and a proposal process for suppressing the power consumption. Hereinafter, a specific configuration for performing the target value determination process and the proposal process will be described. The control unit 33 includes an analysis unit 34, an estimation unit 35, a determination unit 36, a determination unit 37, and a proposal unit 38.

  The analysis unit 34 determines the power consumption stored in the storage unit 31 as a base power consumption including standby power (also defined as a fourth power consumption) and a non-base power consumption not including standby power ( (5) Power consumption is also defined. As described later, there are various variations in the process of determining the target value, and the analysis by the analysis unit 34 may not be necessary. That is, the analysis unit 34 is not an essential component.

  The estimation unit 35 estimates the power consumption in the target period using the power consumption stored in the storage unit 32. The target period is, for example, one month on the calendar, but may be one week on the calendar, or may be a period unrelated to the calendar. The target period may be a period (= future) that precedes the time when estimation is performed by the estimation unit 35, or only a part of the target period may be a future period.

  The determination unit 36 determines the power consumption estimated by the estimation unit 35 as the target value of the power consumption in the target period.

  The determination unit 37 determines whether the target value determined by the determination unit 36 is smaller than the user target value received by the first communication unit 39 (target value receiving unit 39a). The user target value is a target value of power consumption in a target period specified by the user.

  The proposal unit 38 notifies that power consumption is predicted to exceed the target value or makes a proposal to reduce the power consumption according to the target value determined by the determination unit. Specifically, the proposal unit 38 generates information for causing the display device 50 to display the contents of such notification and proposal, and transmits the information to the display device 50 using the first communication unit 39.

  In addition, when the determination unit 37 determines that the user target value is smaller than the target value determined by the determination unit 36, the proposal unit 38 proposes the power consumption reduction method to the user of the customer 5. Specifically, the proposal unit 38 generates proposal information for causing the display device 50 to display the content of the proposal, and transmits the proposal information to the display device 50 using the first communication unit 39.

  The details of the target value determination process and the proposal process (proposal based on the determination of the determination unit 37) performed by each component of the control unit 33 described above will be described later.

  The first communication unit 39 communicates with the display device 50. For example, the first communication unit 39 transmits information for displaying the amount of power consumption to the second communication unit 53 of the display device 50 under the control of the control unit 33. Also, the first communication unit 39 transmits the proposal information generated by the proposal unit 38 to the second communication unit 53 of the display device 50.

  Furthermore, the first communication unit 39 also functions as the target value receiving unit 39a, and receives a user target value and the like. The first communication unit 39 receives the target reduction amount of the power rate designated by the user, the target reduction amount of the power consumption designated by the user, and the like, in addition to the user target value. Thereby, the proposal unit 38 can propose the reduction of the power consumption according to the target reduction amount of the power rate and the target reduction of the power consumption.

  Specifically, the first communication unit 39 is a communication module (communication circuit) that performs communication using a wireless LAN, but may be a communication module using another communication method. When the communication method of the acquisition unit 31 and the communication method of the first communication unit 39 are the same, the acquisition unit 31 and the first communication unit 39 may be realized as one communication module. When the first communication unit 39 performs communication using a wireless LAN, a wireless LAN router (not shown) intervenes between the first communication unit 39 and the second communication unit 53.

  The clocking unit 40 is a clocking device that measures the current date and time (including the date). The control unit 33 stores the power consumption amount in the storage unit 32 in association with the date and time using the clock unit 40. Specifically, the clock unit 40 is a real time clock IC or the like, but may be in any form.

  In the power management system 10, the power consumption is associated with the date and time in the power management apparatus 30, but may be associated with the date and time in the power measurement apparatus 20. Thereby, the freedom degree of acquisition timing of the electric power consumption of the acquisition part 31 can be raised.

[Display device]
The display device 50 displays the amount of power consumption stored in the storage unit 32. Specifically, the display device 50 is, for example, a personal computer, but may be a television, a smartphone, or a tablet terminal. The display device 50 may be a dedicated display device compatible with the power management device 30. The display device 50 includes a second communication unit 53, a display control unit 54, a display unit 51, and an input receiving unit 52.

  The second communication unit 53 communicates with the first communication unit 39 of the power management device 30. For example, the second communication unit 53 receives, from the first communication unit 39, information for displaying the power consumption amount stored in the storage unit 32. Also, for example, the second communication unit 53 receives, from the first communication unit 39, proposal information for displaying the proposal content of the proposal unit 38. Further, the second communication unit 53 transmits the user target value input through the input reception unit 52 to the first communication unit 39.

  Specifically, the second communication unit 53 is a communication module (communication circuit) that performs communication using a wireless LAN, but may be capable of communicating with the first communication unit 39. Therefore, the second communication unit 53 may be a communication module using another communication method corresponding to the first communication unit 39.

  The display control unit 54 displays an image on the display unit 51 based on the information received by the second communication unit 53. FIG. 3 and FIG. 4 are diagrams showing examples of images displayed on the display unit 51. As shown in FIG.

  As shown in FIG. 3, when the second communication unit 53 receives the information for displaying the power consumption, the display control unit 54 causes the display unit 51 to display the power consumption. In the example of FIG. 3, the power consumption is displayed for each branch circuit 12. Thus, the user can know the amount of power consumption of each branch circuit 12 through the display unit 51. Moreover, in the example of FIG. 3, the power consumption is divided and displayed on the base power consumption and the other power consumption (non-base power consumption). Thereby, the user can know the base power consumption amount and the non-base power consumption amount through the display unit 51.

  In addition, as shown in FIG. 4, the display control unit 54 displays the average value of the power consumption on each day according to time series based on the information for displaying the power consumption received by the second communication unit 53. And may be displayed on the display unit 51. Thus, the user can know the power consumption for each day of the week.

  The display control unit 54 may cause the display unit 51 to display the target value determined by the determination unit 36 and the user target value received by the target value receiving unit 39a.

  Specifically, the display control unit 54 is realized by a processor, a microcomputer, or a dedicated circuit.

  The display unit 51 displays the power consumption based on the control of the display control unit 54. Specifically, the display unit 51 is realized by a liquid crystal panel or an organic EL panel.

  The input receiving unit 52 is a user interface for the user to input a user target value. 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 receiving unit 52 is a GUI (Graphical User Interface) including a touch panel.

[Determination process of target value]
Next, the process of determining the target value of the power management apparatus 30 will be described. FIG. 5 is a flowchart of the process of determining the target value of the power management apparatus 30.

  The acquisition unit 31 of the power management apparatus 30 acquires the power consumption of the customer 5 measured by the power measurement apparatus 20 (the measurement unit 25) (S11). The power consumption amount acquired by the acquisition unit 31 is stored in the storage unit 32 in association with the date and time when the power consumption amount was measured (S12). Note that storage of the power consumption amount in the storage unit 32 is performed by the control unit 33.

  As described above, the storage unit 32 stores power consumption. Control unit 33 determines the target value based on the amount of power consumption accumulated in storage unit 32.

  First, the estimation unit 35 estimates the power consumption in the target period using the power consumption stored in the storage unit 32 (S13).

  Next, the determination unit 36 determines the power consumption estimated by the estimation unit 35 as the target value of the power consumption in the target period (S14). Hereinafter, a specific determination example of the target value (a method of estimating the power consumption) will be described.

[Example 1 of determination of target value]
Here, determination example 1 of the target value will be described. FIG. 6 is a flowchart of a first determination example of the target value. In the determination example 1, the estimation unit 35 calculates the average value of the power consumption stored in the storage unit 32 for each day of the week, and estimates the power consumption of the target period using the calculated average value for each day of the week.

  In the target value determination example 1, as of June 8, power consumption for one month in June (from June 1st to June 30th), from June 1st to June 7th Estimate based on the actual value of power consumption of In this case, the measured values of the power consumption from June 1 to June 7 are stored in the storage unit 32. The target period is one month in June (from June 1st to June 30th).

  First, the estimation unit 35 refers to the storage unit 32 to extract power consumption from June 1 to June 7, and calculates an average value of the extracted power consumption for each day of the week (S21). In this case, in the period from June 1st to June 7th, since each day of the week includes only one day each, the actual measurement value of each day of the week becomes the average value as it is.

The actual values of power consumption for each day of each day from Monday to Sunday in the period from June 1 to June 7 are W _mon , W _tue , W _wed , W _thurs , W _fri , respectively It is expressed as W _sat and W _sun .

  Next, the estimation unit 35 specifies the number of days of each day included in the target period (S22). For example, in the month of June, the estimation unit 35 has 5 days on Monday, 5 days on Tuesday, 4 days on Wednesday, 4 days on Thursday, 4 days on Friday, 4 days on Saturday, and 4 days on Sunday. Identify what is included.

Then, the estimation unit 35 multiplies the calculated average value for each day of the week by the number of days of the specified day of the week (S23). For example, the average value W _{mon of} power consumption on Monday is multiplied by 4, which is the number of Mondays included in the target period. The same is true for Tuesday to Sunday.

  Then, the estimation unit 35 estimates the sum of the multiplication results as the power consumption in the target period (S24). That is, the estimation unit 35 performs the following calculation.

W _mon x 5 + W _tue x 5 + W _wed x 4 + W _thurs x 4
+ W _fri x 4 + W _sat x 4 + W _sun x 4

  The amount of power consumption tends to differ from day to day depending on the life pattern of the user. In other words, on the same day of the week, it is considered that the tendency (magnitude) of the power consumption does not change significantly. Therefore, according to the determination example 1 of the target value, the power consumption in the target period can be estimated with high accuracy.

  As mentioned above, as of June 8, power consumption for one month of June (from June 1 to June 30), June 1, immediately before June 8 When estimating based on the measured value of the power consumption from June 1 to June 7, the measured value may be used as the power consumption from June 1 to June 7. In this case, the target period is the period from June 8 to June 30, and the estimated value of the power consumption in the target period and the measured value of the power consumption from June 1 to June 7 The sum of と and 消費 is estimated as the amount of power consumption for one month of June.

[Example 2 of determination of target value]
Next, determination example 2 of the target value will be described. FIG. 7 is a flowchart of the example 2 of target value determination. In the determination example 2, the estimation unit 35 calculates the average value of the power consumption stored in the storage unit 32 per day, and estimates the power consumption of the target period using the calculated average value.

  In the example 2 of target value determination, as of June 1st, the amount of power consumption for 1 month of June (from June 1st to June 30th), for 1 month of the last month of May (5 Estimated based on the actual value of power consumption from 1st May to 31st May). In this case, the measured values of the amount of power consumption from May 1 to May 31 are stored in the storage unit 32. The target period is one month in June (from June 1st to June 30th).

  First, the estimating unit 35 extracts the power consumption from May 1 to May 31 with reference to the storage unit 32, and calculates an average value of the extracted power consumption per day (S31).

  Next, the estimation unit 35 specifies the number of days included in the target period (S32). Specifically, the estimation unit 35 specifies that the number of days included in one month of June is 30 days.

  Then, the estimation unit 35 estimates, as the power consumption in the target period, the power consumption obtained by multiplying the average value per day calculated in step S31 by the number of days specified in step S32 (S33).

  As described above, the estimating unit 35 can estimate the power consumption of the target period using the average value of the past power consumption stored in the storage unit 32 per day.

  In addition, as a modified example of the determination example 2, as of June 2, the power consumption for one month of June (from June 1 to June 30), the power consumption of June 1 An example can be considered in which the estimation is made based on the actual measurement value of In this case, the power consumption of the target period is estimated to be 30 times (the number of days included in the target period) the actual value of June 1.

[Example 3 of determination of target value]
Next, determination example 3 of the target value will be described. FIG. 8 is a flowchart of the example 3 of determining the target value.

  In Decision Example 3, the amount of power consumption for one month in June is estimated. In the decision example 3, specifically, the consumption during the immediately preceding month of May based on the rate of change of the actual value of the consumption of electric power in June of the previous year relative to the actual value of the electric power consumption in May of the previous year Assuming that the amount of power consumption changes similarly from the actual value of the amount of energy, the amount of power consumption for one month in June is estimated.

  Here, in the determination example 3, the power consumption in May of the previous year is the first power consumption, the power consumption in June of the previous year is the second power consumption, and the power consumption in May of this year is the third It is expressed as power consumption. May of the previous year is an example of the first period, June of the previous year is an example of the second period, and May of the previous year is an example of the third period. That is, the second period is a period after the first period, the third period is a period after the second period, and the target period is a period after the third period.

  The estimation unit 35 first calculates a change rate of the second power consumption with respect to the first power consumption (S41). Next, the estimation unit 35 estimates the power consumption amount obtained by multiplying the calculated change rate by the third power consumption amount as the power consumption amount in the target period (S42). That is, the estimated value of the power consumption in June of this year is expressed by the following equation.

Estimated energy consumption for June this year = Actual energy consumption for May of this year
× Actual value of power consumption in June of the previous year
Actual value of power consumption in May of the previous year

  As described above, the estimation unit 35 can estimate the power consumption of the target period using the change rate of the power consumption.

  The rate of change may be calculated for each day of the week. In this case, the estimation unit 35 first calculates, for each day of the week, the rate of change of the second power consumption with respect to the first power consumption. More specifically, the estimation unit 35 calculates the average value of the power consumption for each day in the first period (May of the previous year). Similarly, the estimation unit 35 calculates the average value of the power consumption for each day of the week in the second period (June of the previous year).

  Then, the estimation unit 35 uses the average value of the power consumption for each day of the week in the first period and the average value of the power consumption for each day of the week in the second period to calculate the change rate of the power consumption for each day of the week. calculate. For example, the estimation unit 35 calculates the change rate corresponding to Monday by dividing the average value of the power consumption on Monday in the second period by the average value of the power consumption on Monday in the first period. The corresponding rates of change from Tuesday to Sunday are likewise calculated.

  On the other hand, the estimation unit 35 calculates the average value of the power consumption for each day of the third period (May of the present year), and corresponds to the calculated average power consumption for each day of the day Multiplied by the rate of change. Then, the estimation unit 35 calculates the sum of the multiplication results as an estimated value of the power consumption in the target period.

  Thus, the estimation unit 35 can estimate the power consumption of the target period with higher accuracy, using the change rate of the power consumption for each day of the week.

[Example 4 of determination of target value]
Next, determination example 4 of the target value will be described. In the determination example 4, the power consumption is divided by the analysis unit 34 into the base power consumption and the non-base power consumption.

  Here, the base power consumption refers to a user's intentional operation such as standby power consumed regularly by the television to receive infrared light from the remote control, and power consumed constantly by the refrigerator. It is the power consumption that is not relevant. The base power consumption is, in other words, the necessary (minimum required) power consumption even when the user in the customer 5 is not actively operating the electric device 23.

  On the other hand, the amount of power consumption generated when the user intentionally operates the electric device 23 is defined as the non-base power consumption. The non-base power consumption is the power consumption excluding the base power consumption from the power consumption.

  Specifically, the analysis unit 34 obtains the minimum value of the comparison values within a range satisfying the condition that the time for which the power consumption continues to fall below the comparison value exceeds the predetermined maintenance time, and this minimum value is used as a basis It can be a peak value of power consumption. That is, the peak value of the base power consumption in the target period is the smallest comparison value among the comparison values that satisfy the condition that the power consumption in the target period is equal to or less than a predetermined period of a length less than the target period It is. In a time zone in which the power consumption is smaller than the peak value in the target period, the power consumption in the time zone is the base power consumption. In addition, in the time period in which the power consumption is equal to or higher than the peak value in the target period, the peak value is the base power consumption. FIG. 9 is a diagram illustrating an example of base power consumption and non-base power consumption.

  In FIG. 9, the change in daily power consumption in the living room is shown divided into the base power consumption and the non-base power consumption. As shown in FIG. 9, the base power consumption hardly changes according to the time zone.

  Therefore, the estimation unit 35 estimates the power consumption corresponding to the base power consumption in the target period using the base power consumption. Specifically, estimation unit 35 determines the base power consumption stored in storage unit 32 (a portion of the power consumption stored in storage unit 32 that is determined by analysis unit 34 as the base power consumption) Calculate the daily average of Then, the estimation unit 35 calculates the power consumption amount obtained by multiplying the calculated average value per day by the number of days included in the target period as the power consumption amount corresponding to the base power consumption amount in the target period.

  On the other hand, the estimation unit 35 estimates the power consumption corresponding to the non-base power consumption in the target period using the non-base power consumption. The estimation unit 35 uses the non-base power consumption stored in the storage unit 32 (a portion of the power consumption stored in the storage unit 32 that is determined by the analysis unit 34 to be the non-base power consumption). The power consumption corresponding to the non-base power consumption in the target period is estimated by performing the processing described in the first to third determination examples.

  Then, the estimation unit 35 estimates the sum of the power consumption corresponding to the estimated base power consumption and the power consumption corresponding to the estimated non-base power consumption as the power consumption in the target period.

  The base power consumption and the non-base power consumption have a large difference in fluctuation of the power consumption. Therefore, the estimation unit 35 divides the power consumption stored in the storage unit 32 into the base power consumption and the non-base power consumption whose temporal fluctuation is larger than the base power consumption and consumes the power in different ways. By estimating the amount of power, it is possible to estimate the amount of power consumption with high accuracy.

[Proposal processing]
Next, the proposal process performed by the proposal unit 38 will be described. The proposal process is premised on that the target value receiving unit 39a receives the user target value. Acceptance of the user target value, that is, input by the user is performed, for example, through a setting screen of the target value.

  The control unit 33 transmits, for example, information for displaying the setting screen of the target value of the power consumption of the next month at the end of the month to the display device 50, and the display device 50 sets the target value based on the received information. Display the setting screen. FIG. 10 is a diagram showing an example of a setting screen of target values.

  As shown in FIG. 10, the user can select whether to set the target value by himself or have the power management apparatus 30 set it.

  Here, when the user selects the power management apparatus 30 to set the target value, the power consumption estimated by the method as in the above-described determination examples 1 to 4 and determined by the determination unit 36 is used as the target value. Used.

  On the other hand, when the user selects to set the target value by himself, the proposal process by the proposal unit 38 is performed with such a selection as a trigger. FIG. 11 is a flowchart of the proposal process.

  First, when the user inputs a user target value through the input receiving unit 52, the first communication unit 39 receives the user target value transmitted from the second communication unit 53. That is, the user target value is received (S51).

  The determination unit 37 determines whether the target value determined by the determination unit 36 is smaller than the user target value received by the first communication unit 39 (S52).

  Here, the target value determined by the determination unit 36 is an estimated value of the amount of power consumption when it is assumed that the user has consumed power as before. Therefore, when the user target value is smaller than the target value determined by the determination unit 36, it is considered that power saving is necessary in the customer 5 in order to reduce the power consumption to the user target value or less.

  Therefore, when the proposing unit 38 determines that the user target value is smaller than the target value determined by the determining unit 36 (Yes in S52), the proposing unit 38 reduces the power consumption of the customer 5 Suggest to the user (S53).

  On the other hand, when the user target value is equal to or higher than the target value determined by the determination unit 36, it is considered that the power consumption can be suppressed to the user target value or less if the user consumes power as before. That is, when it is determined that the user target value is equal to or more than the target value determined by the determination unit 36 (No in S52), the proposal process is not performed, and the operation is ended.

  In step S53, for example, the proposal unit 38 calculates the average value of the power consumption stored in the storage unit 32 for each day of the week, and suppresses the power consumption on the day having the highest average value for each day of the week calculated. Suggest that. More specifically, the proposal unit 38 generates proposal information for causing the display unit 51 to display a display screen indicating such proposal content, and transmits the proposal information to the display device 50 using the first communication unit 39.

  As a result, on the display unit 51, a display screen as shown in FIG. 12 is displayed. FIG. 12 is a diagram showing an example of a display screen which proposes to suppress the power consumption on the day when the power consumption is the largest.

  Also, even if the proposal unit 38 proposes to suppress the power consumption in the branch circuit 12 with the largest power consumption based on the power consumption for each branch circuit 12 stored in the storage unit 32, for example. Good.

  At this time, the proposal unit 38 (or the analysis unit 34) divides the power consumption into the base power consumption and the non-base power consumption, and suppresses the power consumption in the branch circuit 12 with the largest non-base power consumption. You may suggest to do. This is because the non-base power consumption is different from the base power consumption, and there is a room for reduction. FIG. 13 is a diagram showing an example of a display screen which proposes to suppress the power consumption in the branch circuit 12 with the largest non-base power consumption.

  When target value reception unit 39a receives the target reduction amount of power rate and the target reduction amount of power consumption instead of the user target value, determination unit 37 determines the target reduction amount of power rate and consumption. The determination is made by converting the target reduction amount of the power amount into the power consumption amount. Here, data used for conversion (for example, data indicating the relationship between the power rate and the amount of power consumption) is stored in the storage unit 32.

[Effects, etc.]
As described above, the power management apparatus 30 acquires the power consumption of the customer 5 measured by the power measurement apparatus 20, and the power consumption acquired by the acquisition unit 31 corresponds to the power consumption. And a storage unit 32 stored in association with the date and time when the amount was measured. In addition, the power management apparatus 30 estimates the power consumption in the target period using the power consumption stored in the storage unit 32, and the power consumption estimated by the estimation unit 35 as the power consumption in the target period. And a determination unit that determines the target value of the amount of power. The power measurement device 20 is an example of a measurement device.

  Thereby, the estimated value of the power consumption in the target period based on the results of the power consumption stored in the storage unit 32 is set as the target value. That is, the power management apparatus 30 can appropriately determine the target value of the power consumption.

  In addition, the estimation unit 35 may calculate the average value of the power consumption stored in the storage unit 32 for each day of the week, and estimate the power consumption of the target period using the calculated average value for each day of the week . Specifically, the estimating unit 35 specifies the number of days of each day included in the target period, and multiplies the calculated average value for each day by the number of days of the specified day, for each day in the target period. Calculate the estimated power consumption of Then, the estimation unit 35 estimates the total of the calculated estimated power consumption for each day of the week as the power consumption in the target period.

  Power consumption often has a tendency for each day of the week. Therefore, the estimation unit 35 can estimate the power consumption with high accuracy by performing the calculation for each day of the week.

  Further, the estimation unit 35 may calculate the average value of the power consumption stored in the storage unit 32 per day, and estimate the power consumption of the target period using the calculated average value. Specifically, the estimation unit 35 specifies the number of days included in the target period, and uses the calculated average value per day multiplied by the specified number of days as the power consumption in the target period. It may be estimated.

  Thereby, the estimation unit 35 can estimate the power consumption in the target period using the power consumption per day.

  In addition, the storage unit 32 includes a first amount of power consumption in the first period, a second amount of power consumption in the second period after the first period, and a third amount of time in the third period after the second period. Power consumption may be stored. The estimation unit 35 calculates the rate of change of the second power consumption with respect to the first power consumption, and uses the calculated rate of change, multiplied by the third power consumption, as the power consumption in the target period. It may be estimated.

  Thus, the estimation unit 35 can estimate the power consumption based on the change rate of the power consumption in the past.

  Further, the estimation unit 35 may calculate, for each day of the week, a change rate of the second power consumption with respect to the first power consumption, and calculate an average value of the third power consumption for each day of the week. The estimating unit 35 calculates the estimated power consumption for each day of the week in the target period by multiplying the calculated average value of the third power consumption for each day of the week by the calculated change rate of the day of the week, and calculating The total estimated power consumption for each day of the week may be estimated as the power consumption in the target period.

  Accordingly, the estimation unit 35 can estimate the power consumption based on the change rate of the past power consumption for each day of the week.

  In addition, each of the first period, the second period, the third period, and the target period is a period on a calendar, and the first period is the same month one year before the third period, The second period may be the same month one year before the target period.

  Thereby, the estimation part 35 can estimate the power consumption of this year based on the change rate of the power consumption of one year ago.

  Further, the power management apparatus 30 further analyzes the power consumption stored in the storage unit 32 into a base power consumption and a non-base power consumption having a temporal variation larger than the base power consumption. The unit 34 may be provided. The estimation unit 35 may estimate the power consumption corresponding to the base power consumption in the target period using the base power consumption. The estimation unit 35 may estimate the power consumption corresponding to the non-base power consumption in the target period using the non-base power consumption. The estimation unit 35 may estimate the sum of the power consumption corresponding to the estimated base power consumption and the power consumption corresponding to the estimated non-base power consumption as the power consumption in the target period.

  The base power consumption and the non-base power consumption have a large difference in fluctuation of the power consumption. Therefore, the estimation unit 35 divides the power consumption stored in the storage unit 32 into the base power consumption and the non-base power consumption whose temporal fluctuation is larger than the base power consumption and consumes the power in different ways. By estimating the amount of power, it is possible to estimate the amount of power consumption with high accuracy.

  In addition, power management device 30 further includes a user target value which is a target value of power consumption in a target period specified by the user, a target reduction amount of power charge specified by the user, and a consumption specified by the user. A target value receiving unit 39a may be provided that receives at least one of the target reduction amounts of power.

  Thereby, the power management apparatus 30 can receive at least one of the user target value, the target reduction amount of the power rate, and the target reduction amount of the power consumption.

  Further, the target value receiving unit 39a receives the user target value, and the power management apparatus 30 further determines whether the target value determined by the determining unit 36 is smaller than the user target value received by the target value receiving unit. May be provided. In addition, the power management apparatus 30 may include a proposal unit 38 that proposes a method of reducing the power consumption to the user when it is determined that the user target value is smaller than the target value.

  Thus, the power management apparatus 30 can urge the power consumption to be less than or equal to the user target value.

  In addition, the proposal unit 38 calculates the average value of the power consumption stored in the storage unit 32 for each day of the week, and proposes to suppress the power consumption on the day when the calculated average for each day is the highest. It is also good.

  Thereby, the power management apparatus 30 can propose that the power consumption be suppressed on the day when the power consumption is large.

(Other embodiments)
The power management system 10 and the power management apparatus 30 according to the first embodiment have been described above, but the present invention is not limited to the first embodiment.

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

  Also, for example, in the above-mentioned first embodiment, another processing unit may execute the processing executed by a specific processing unit. In addition, the order of a plurality of processes may be changed, or a plurality of processes may be executed in parallel.

  Further, the distribution of the component to the device in the first embodiment is an example. For example, although the power measurement device and the power management device are separate devices, they may be one device. That is, the power measurement apparatus may have each component of the power management apparatus.

  Also, the display device and the power management device may be one device. That is, the power management apparatus may have each component of the display device.

  Also, for example, the power management apparatus may be realized as a server provided outside the customer. In this case, for example, the power management apparatus acquires power consumption by a PLC from a smart meter provided for a plurality of consumers, and determines a target value of the power consumption for each of the plurality of consumers. Can.

  In the first embodiment, each component may be configured by dedicated hardware or implemented 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 in a recording medium such as a hard disk or a semiconductor memory.

  Also, each component may be a circuit (or 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.

  In addition, general or specific aspects of the present invention may be realized as a system, an apparatus, a method, an integrated circuit, a computer program, or a recording medium such as a computer readable CD-ROM. Also, the present invention may be realized as any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium. For example, the present invention may be realized as the above-described power management system, or may be realized as a program for causing a computer to function as a power management system or a power management apparatus. Furthermore, the present invention may be realized as a method of determining a target value performed by a power device or a proposed method of suppressing power consumption.

  Further, the order of the plurality of processes in the operation of the power management apparatus described in the first embodiment is an example. The order of the plurality of processes may be changed, or the plurality of processes may be performed in parallel.

  In addition, the embodiments can be realized by various combinations that each person skilled in the art can think of for each embodiment, or by combining components and functions in each embodiment without departing from the scope of the present invention. The embodiments of the present invention are also included in the present invention.

5 Consumer 20 Power Measurement Device (Measurement Device)
30 power management device 31 acquisition unit 32 storage unit 33 control unit 34 analysis unit 35 estimation unit 36 determination unit 37 determination unit 38 proposal unit 39a target value reception unit

Claims (7)

An acquisition unit for acquiring the amount of power consumption at the customer, which is measured by the measuring device;
A storage unit in which the power consumption acquired by the acquisition unit is stored in association with the date and time when the power consumption was measured;
An estimation unit that estimates the power consumption in a target period using the power consumption stored in the storage unit;
And a determination unit configured to determine the power consumption estimated by the estimation unit as a target value of the power consumption in the target period ,
The storage unit includes a first power consumption in a first period, a second power consumption in a second period after the first period, and a third power in a third period after the second period. Power consumption is stored,
The estimation unit
Calculating a change rate of the second power consumption relative to the first power consumption for each day of the week,
Calculating an average value of the third power consumption for each day of the week,
The estimated power consumption for each day in the target period is calculated by multiplying the calculated average value of the third power consumption for each day of the week by the calculated change rate of the day of the week,
The total of the calculated estimated power consumption for each day of the week is estimated as the power consumption in the target period,
Power management device. Each of the first period, the second period, the third period, and the target period is a period on a calendar.
The first period is the same month one year before the third period,
The second period is the same month one year before the target period,
The power management device according to claim 1 . An acquisition unit for acquiring the amount of power consumption at the customer, which is measured by the measuring device;
A storage unit in which the power consumption acquired by the acquisition unit is stored in association with the date and time when the power consumption was measured;
An estimation unit that estimates the power consumption in a target period using the power consumption stored in the storage unit;
A determination unit that determines the power consumption estimated by the estimation unit as a target value of the power consumption in the target period;
The power consumption stored in the storage unit, includes a base power consumption, and an analysis unit for partitioning the said base power temporal variation than a large amount of non-base power consumption,
The estimation unit
Estimating the power consumption corresponding to the base power consumption in the target period using the base power consumption;
Estimating the power consumption corresponding to the non-base power consumption in the target period using the non-base power consumption;
The sum of the power consumption corresponding to the estimated base power consumption and the power consumption corresponding to the estimated non-base power consumption is estimated as the power consumption in the target period,
Power management devices. Furthermore, a user target value which is a target value of power consumption in the target period designated by the user, a target reduction amount of the power rate designated by the user, and a target reduction amount of the power consumption designated by the user A target value receiving unit that receives at least one,
The power management device according to any one of claims 1 to 3 . An acquisition unit for acquiring the amount of power consumption at the customer, which is measured by the measuring device;
A storage unit in which the power consumption acquired by the acquisition unit is stored in association with the date and time when the power consumption was measured;
An estimation unit that estimates the power consumption in a target period using the power consumption stored in the storage unit;
A determination unit that determines the power consumption estimated by the estimation unit as a target value of the power consumption in the target period;
A target value receiving unit that receives a user target value that is a target value of power consumption in the target period specified by a user;
A determination unit that determines whether the target value determined by the determination unit is smaller than the user target value received by the target value reception unit;
A proposal unit configured to propose a reduction method of power consumption to the user when it is determined that the user target value is smaller than the target value;
Power management devices. The proposal unit
Calculating an average value of the power consumption stored in the storage unit for each day of the week;
We propose to reduce power consumption on the day of the week when the calculated average value for each day is the highest.
The power management device according to claim 5 . A program for causing a computer to function as the power management device according to any one of claims 1 to 6 .

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