JP6440873B2 - Energy management apparatus, power information display method and program - Google Patents

Description

  The present invention relates to an energy management device, a power information display method, and a program.

  As disclosed in Patent Document 1, a technique for measuring power values of a plurality of power lines with one power measuring device is known.

JP 2013-210288 A

  Incidentally, in recent years, introduction of an energy management system referred to as a so-called HEMS (Home Energy Management System) has been progressing in general households. There is also known a technique for managing energy in the home by linking HEMS and other systems such as a power conditioning system (EV-PCS) for an electric vehicle (EV).

  For example, in the EV-PCS, in order to control charging and discharging of a storage battery mounted on the EV, it is necessary to measure power for purchasing or selling power, generated power, power for discharging or charging. On the other hand, in HEMS, the power consumed by the power measuring device is measured.

  In the power measurement apparatus and the EV-PCS, the power measurement interval, in other words, the power measurement sampling interval is not necessarily the same. Have difficulty.

  That is, there is a shift in the timing for measuring the power between the power measurement device and the EV-PCS, that is, a shift in the time for measuring the power. This is the result of the power measurement results by these devices in HEMS. This is one of the factors that hinder its use.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide an energy management device or the like that can effectively use the measurement results of power by a plurality of measurement devices.

To achieve the above object, an energy management apparatus according to the present invention is
First measurement data including each measured power of one or a plurality of power lines included in the first power line group is acquired from the first measurement apparatus, and then transferred from the second measurement apparatus to the second power line group. Measurement data acquisition means for acquiring second measurement data including each measured power of one or a plurality of power lines included;
The first measurement data for a predetermined period is statistically processed to determine a first representative power that is representative of the total power of the first power line group, and the second measurement data for the predetermined period Representative power determination means for statistically processing measurement data to determine a second representative power that is representative of the total power of the second power line group;
And information output means for outputting power information including information indicating the transition of the first representative power and the transition of the second representative power to a display device.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to utilize effectively the measurement result of the electric power by a several measuring device.

It is a figure showing the whole energy management system composition concerning an embodiment of the present invention. It is a figure for demonstrating the measurement data which an electric power measurement apparatus produces | generates. It is a figure for demonstrating the measurement data which EV-PCS produces | generates. It is a block diagram which shows the hardware constitutions of an energy management apparatus. It is a figure for demonstrating the secondary storage device with which an energy management apparatus is provided. It is a figure which shows the function structure of an energy management apparatus. It is FIG. (1) for demonstrating a time difference. It is FIG. (2) for demonstrating a time difference. It is FIG. (3) for demonstrating a time difference. It is FIG. (4) for demonstrating a time difference. It is FIG. (5) for demonstrating a time difference. It is a figure which shows an example of a parameter table. It is a figure (the 1) which shows transition of the electric power based on representative electric power data. It is a figure (the 2) which shows transition of the electric power based on representative electric power data. It is a flowchart which shows the procedure of an electric power information display process. It is a figure which shows the whole structure of the energy management system which concerns on other embodiment. It is a figure which shows the whole structure of the energy management system which concerns on other embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing an overall configuration of an energy management system 1 according to an embodiment of the present invention. The energy management system 1 is a so-called HEMS (Home Energy Management System) that manages electric power used in a general household. The energy management system 1 includes an energy management device 2, an operation terminal 3, a power measurement device 4, an EV-PCS 5, and a PV-PCS 6.

  The energy management device 2 is installed at an appropriate location in the house H, monitors the power consumed in the house H, that is, the demand area, and displays the power consumption status via the operation terminal 3. Moreover, the energy management apparatus 2 performs operation control of a plurality of devices 7 (devices 7-1, 7-2,. Details of the energy management device 2 will be described later.

  The operation terminal 3 (display device) includes an input device such as a push button, a touch panel, and a touch pad, an output device such as an organic EL display and a liquid crystal display, and a communication interface, for example, a mobile phone such as a smartphone or a tablet terminal. Equipment. The operation terminal 3 communicates with the energy management device 2 in accordance with a well-known communication standard such as Wi-Fi (registered trademark), Wi-SUN (registered trademark), or a wired LAN. The operation terminal 3 receives an operation from the user and transmits information indicating the received operation content to the energy management apparatus 2. In addition, the operation terminal 3 receives the information transmitted from the energy management device 2 and presented to the user, and displays the received information. Thus, the operation terminal 3 plays a role as an interface (user interface) with the user.

  The power measuring device 4 measures the value of power transmitted through the power line D2 (first power line group) of the house H at regular time intervals (every 30 seconds in the present embodiment). The power line D2 is disposed between the EV-PCS 5 and the distribution board 9. The power measuring device 4 is connected to a CT (Current Transformer) 1 connected to the power line D2 via a communication line. CT1 is a sensor that measures an alternating current. The power measuring device 4 measures the power value of the power line D2 based on the measurement result of CT1.

  The power measuring device 4 includes a wireless communication interface, and is connected to the energy management device 2 through a wireless network (not shown) constructed in the house H so as to be communicable. This wireless network is, for example, a network conforming to ECHONET Lite. The power measuring device 4 may be of a specification that is connected to this wireless network via an external communication adapter (not shown).

  In response to the request from the energy management device 2, the power measurement device 4 generates measurement data that stores the measured power value of the power line D <b> 2 and transmits the measurement data to the energy management device 2. Specifically, as shown in FIG. 2, the measurement data stores the device ID of the power measurement device 4 and the power data.

  The device ID is an ID (identification) for identifying a device connected to the energy management apparatus 2 (EV-PCS5, PV-PCS6, devices 7-1, 7-2,...). In the present embodiment, the device ID of the power measuring device 4 is “10”.

  In the power data, the power line ID of the power line D2 and the measured power value of the power line D2 are stored. The power line ID is an ID for identifying the power line. In the present embodiment, the power line ID of the power line D2 is “02”.

  Returning to FIG. 1, EV-PCS 5 is a power conditioning system for EV (electric vehicle) 10. The EV-PCS 5 controls charging and discharging of the storage battery 11 mounted on the EV 10. The EV-PCS 5 supplies power from the commercial power supply 8 and the PV-PCS 6 to the storage battery 11 via the power line D4 when the storage battery 11 is charged. Further, the EV-PCS 5 supplies power from the storage battery 11 to the distribution board 9 via the power lines D4 and D2 when the storage battery 11 is discharged.

  The EV-PCS 5 performs control of charging and discharging, so that power is transmitted through each of the power lines D1, D3, and D4 (second power line group) at regular time intervals (in this embodiment, every 30 seconds). The value of is measured. The power line D1 is disposed between the commercial power supply 8 and the EV-PCS 5, the power line D3 is disposed between the PV-PCS 6 and the EV-PCS 5, and the power line D4 is disposed between the EV-PCS 5 and the EV 10. It is arranged.

  The EV-PCS 5 is connected to each of the CTs 2 to 4 connected to the power lines D1, D3, and D4 via communication lines. The EV-PCS 5 measures the power value of the power line D1 based on the measurement result of CT2. Similarly, the EV-PCS 5 measures the power values of the power lines D3 and D4 based on the measurement results of CT3 and 4.

  Further, the EV-PCS 5 is communicably connected to the energy management device 2 via a dedicated communication line. In response to the request from the energy management device 2, the EV-PCS 5 generates measurement data that stores the measured power values of the power lines D 1, D 3, and D 4 and transmits the measurement data to the energy management device 2. Note that the EV-PCS 5 may communicate with the energy management apparatus 2 via the above-described wireless network built in the house H.

  In the measurement data generated by the EV-PCS 5, the device ID of the EV-PCS 5 and the power data 1 to 3 are stored as shown in FIG. In the present embodiment, the device ID of the EV-PCS 5 is “11”. The power data 1 to 3 include the power line IDs of the power lines D1, D3, and D4 (in this embodiment, “01”, “03”, and “04”) and the measured power values of the power lines D1, D3, and D4. Stored.

  Returning to FIG. 1, the PV-PCS 6 is a power conditioning system for PV (solar power generation). The PV-PCS 6 converts the electricity generated by the PV panel 12 from DC power to AC power and supplies it to the EV-PCS 5 through the power line D3. The electric power supplied from the PV-PCS 6 is supplied to the distribution board 9 or used to charge the storage battery 11 by the EV-PCS 5. Alternatively, the power supplied from the PV-PCS 6 may be supplied to the commercial power supply 8 by the EV-PCS 5 (so-called power sale).

  For example, the power measuring device 4 corresponds to the first measuring device of the present invention, and the EV-PCS 5 corresponds to the second measuring device of the present invention.

  The device 7 (devices 7-1, 7-2,...) Is an electric device such as an air conditioner, an illuminator, a floor heating system, a refrigerator, an IH (Induction Heating) cooker, a television, or a water heater. The devices 7-1, 7-2,... Are installed in the house H (including the site), and are connected to the power lines D5, D6,. Each device 7 is communicably connected to the energy management apparatus 2 via the wireless network (not shown). Each device 7 may have a specification that is connected to this wireless network via an external communication adapter (not shown).

  As shown in FIG. 4, the energy management device 2 includes a CPU (Central Processing Unit) 20, a communication interface 21, a ROM (Read Only Memory) 22, a RAM (Random Access Memory) 23, and a secondary storage device 24. With. These components are connected to each other via a bus 25. The CPU 20 controls the energy management device 2 in an integrated manner. Details of functions realized by the CPU 20 will be described later.

  The communication interface 21 is a network interface card controller (NIC) for wireless communication or wired communication with the power measuring device 4 and the devices 7-1, 7-2,..., Wireless communication or wired with the operation terminal 3 and EV-PCS 5. A NIC for communication is provided.

  The ROM 22 stores a plurality of firmware, data used when executing these firmware, and the like. The RAM 23 is used as a work area for the CPU 20.

  The secondary storage device 24 includes an EEPROM (Electrically Erasable Programmable Read-Only Memory), a readable / writable nonvolatile semiconductor memory such as a flash memory, a hard disk drive, and the like. As shown in FIG. 5, the secondary storage device 24 stores a measurement history DB 240 and a parameter table 241. In addition to this, the secondary storage device 24 is used when a program for monitoring the power consumed in the home, a program for controlling the operation of each device 7, and the execution of these programs. Store the data.

  The measurement history DB (measurement history database) 240 is measurement data (that is, first measurement data) sent from each of the power measurement device 4 (first measurement device) and the EV-PCS 5 (second measurement device). And the second measurement data) are stored in the database. The parameter table 241 will be described later.

  Next, functions of the energy management device 2 will be described. As shown in FIG. 6, the energy management device 2 functionally includes a user interface unit 200, a measurement data acquisition unit 201, a representative power data generation unit 202, a power information generation unit 203, and a display instruction unit 204. With. Each of these functional units is realized by the CPU 20 executing one or a plurality of programs stored in the secondary storage device 24.

  The user interface unit 200 performs user interface processing via the operation terminal 3. That is, the user interface unit 200 receives an operation from the user via the operation terminal 3. In addition, the user interface unit 200 transmits information to be presented to the user to the operation terminal 3.

  The measurement data acquisition unit 201 performs processing for acquiring the measurement data described above from the power measurement device 4 and the EV-PCS 5. Specifically, the measurement data acquisition unit 201 requests the power measurement device 4 and the EV-PCS 5 to transmit measurement data at regular intervals (in this embodiment, every 30 seconds). The measurement data acquisition unit 201 acquires measurement data (first measurement data) sent from the power measurement device 4 in response to such a request, and measures the received time of the acquired first measurement data as a measurement time. And then stored in the measurement history DB 240. Similarly, the measurement data acquisition unit 201 acquires the second measurement data sent from the EV-PCS 5 in response to the above request, and uses the received second measurement data as the measurement time. After the assignment, it is stored in the measurement history DB 240.

  The representative power data generation unit 202 (representative power determining means) is configured to change the total power of the first power line group (power of the power line D2) and the total power of the second power line group (the power lines D1, D3, D4). In order to eliminate display inconsistency due to a time difference (time shift) from the time at which (total power) changes, representative power data for display is generated. Hereinafter, this time difference will be described.

  In the power measurement device 4 and the EV-PCS 5, the power measurement interval, in other words, the power measurement sampling interval is the same (30 seconds) in the present embodiment. However, the power measuring device 4 and the EV-PCS 5 are physically separated, and it is difficult for both to accurately and constantly perform measurement. For example, when the power measuring device 4 and the EV-PCS 5 measure power at the timing as shown in FIG. 7, the transition of the power of the power lines D1 to D3 is as shown in FIG. Further, the transition of the total power of the second power line group is as shown in FIG. In the examples shown in FIGS. 8 and 9, it is assumed that the storage battery 11 is not charged and discharged. In addition, in the total power of the second power line group in FIG. 9, the power value of the power line D1 at the time of power sale is handled as a negative number.

  In the case as described above, the energy management device 2 acquires measurement data every 30 seconds from each of the power measurement device 4 and the EV-PCS 5, and based on the acquired time (measurement data reception time), the power line D1 When the transition of the power of .about.D3 is displayed on the same time axis, it is as shown in FIG. 10, and the transition of the total power of the second power line group is as shown in FIG. Here, the total power of the first power line group (power of the power line D2) and the total power of the second power line group are theoretically at the same time when neither the storage battery 11 is charged nor discharged, Should be the same value.

  However, since the power measurement device 4 and the EV-PCS 5 measure power asynchronously, if no measures are taken, the transition of the total power of the first power line group displayed on the energy management device 2 and the first As shown in FIG. 11, there is a time lag (time difference) in power change between the two power line groups and the transition of the total power. As described above, if the power information is displayed with a time difference, the user may feel uncomfortable or uneasy.

  The representative power data generation unit 202 generates representative power data as follows in order to eliminate the display mismatch caused by the time difference. First, the representative power data generation unit 202 reads the history of the first measurement data and the history of the second measurement data for a predetermined period to be displayed from the measurement history DB 240.

  Then, the representative power data generation unit 202 selects one first measurement data at a preset interval (representative selection interval) sequentially from the plurality of read first measurement data in time series. The representative selection interval is preset in the parameter table 241 and is 60 seconds in this embodiment as shown in FIG. The representative power data generation unit 202 uses the first measurement data for a past predetermined period (calculation target period) based on the measurement time (that is, reception time) given to the selected first measurement data. The representative power value (first representative power value) at the reception time is determined. The calculation target period is preset in the parameter table 241 and is 60 seconds in this embodiment as shown in FIG.

  The representative power data generation unit 202 statistically processes the first measurement data for the calculation target period to determine the first representative power value. In the present embodiment, the representative power data generation unit 202 determines the first representative power value by calculating a moving average in the calculation target period. The representative power data generation unit 202 generates representative power data in which the determined first representative power value is associated with the measurement time of the first measurement data, and is stored in the secondary storage device 24 (not shown). 1 in the representative power data table. The representative power data generation unit 202 repeatedly performs the process of generating the representative power data described above until there is no first measurement data to be selected.

  In addition, the representative power data generation unit 202 selects one second measurement data at the above-described representative selection interval sequentially from the plurality of read second measurement data in time series. The representative power data generation unit 202 represents the representative at the reception time from the second measurement data for the past calculation target period based on the measurement time (that is, the reception time) given to the selected second measurement data. A power value (second representative power value) is determined.

  The representative power data generation unit 202 statistically processes the second measurement data for the calculation target period to determine the second representative power value. In the present embodiment, the second representative power value is determined by the same method (that is, moving average) as the first representative power value determination method.

  At this time, when the display mode of the power information indicates individual display of power measured by the EV-PCS 5 (that is, individual display of power of the power lines D1, D3, and D4), the representative power data generation unit 202 A second representative power value for each power line is determined. On the other hand, when the display mode of the power information indicates the total display of the power measured by the EV-PCS 5, the representative power data generation unit 202 displays the total power value (that is, the total power value of the power lines D1, D3, and D4). ) Is determined as the second representative power value.

  When the display mode of the power information indicates individual display, the representative power data generation unit 202 associates the determined second representative power value with the power line ID of the corresponding power line and the measurement time of the second measurement data. The representative power data is generated and stored in a second representative power data table (not shown) stored in the secondary storage device 24.

  On the other hand, when the display mode of the power information indicates the combined display, the representative power data generation unit 202 displays representative power data in which the determined second representative power value is associated with the measurement time of the second measurement data. Generate and store in the second representative power data table. The representative power data generation unit 202 repeatedly performs the process of generating the representative power data described above until there is no second measurement data to be selected.

  Based on the representative power data stored in the first representative power data table and the second representative power data table, the power information generation unit 203 appropriately integrates the power transition of each power line and the power of a plurality of power lines. The power information indicating the transition of the power (for example, the total power described above) on the same time axis is generated.

  The display instruction unit 204 (information output unit) instructs the operation terminal 3 to display the power information generated by the power information generation unit 203. As a result, examples of power information displayed on the operation terminal 3 are shown in FIGS. FIG. 13 shows a display example in the case of individual display, and FIG. 14 shows a display example in the case of total display.

  FIG. 15 is a flowchart showing a procedure of power information display processing executed by the energy management device 2. This power information display process is repeatedly executed at regular time intervals (in this embodiment, every 30 seconds).

  The measurement data acquisition unit 201 acquires measurement data from the power measurement device 4 (step S101). Moreover, the measurement data acquisition unit 201 acquires measurement data from the EV-PCS 5 (step S102). The measurement data acquisition unit 201 stores the acquired measurement data in the measurement history DB 240 after giving the received time as the measurement time.

  The representative power data generation unit 202 generates representative power data corresponding to the power measuring device 4 and representative power data corresponding to the EV-PCS 5 (step S103).

  The power information generation unit 203 generates power information indicating the power transition corresponding to the power measuring device 4 and the power transition corresponding to the EV-PCS 5 on the same time axis (step S104).

  The display instruction unit 204 instructs the operation terminal 3 to display the generated power information (step S105).

  As described above, in the energy management system 1 according to the embodiment of the present invention, the power information is displayed based on the representative power value calculated by the moving average in a predetermined period. Thereby, the inconsistency at the time of displaying the transition of the electric power measured with the different apparatus on the same time axis can be reduced. Therefore, it is possible to present a variety of information related to the power usage state to the user without giving the user a sense of incongruity or anxiety, thereby improving convenience.

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

  In the above embodiment, the representative power value is determined by moving average. However, there is no limitation on the statistical method for determining the representative power value. For example, the representative power data generation unit 202 may determine the median value in the calculation target period as the representative power value.

  In the above embodiment, the power measuring device 4 measures only the power of the power line D2, but may further measure the power of another power line. In this case, the power measurement device 4 generates measurement data that stores the measured power values of the plurality of power lines, and transmits the measurement data to the energy management device 2.

  Further, as a device for measuring power, power is measured by a device other than the power measuring device 4 and the EV-PCS 5, and measurement data storing the measured power value is transmitted to the energy management device 2. Also good. Other devices in this case include, for example, a PV-PCS 6, a stationary storage battery system, a smart meter, and the like (both not shown), and any of them can be the first measuring device or the second measuring device.

  Moreover, the sampling interval of the electric power measurement apparatus 4 and EV-PCS5 does not need to be the same.

  In the above embodiment, the energy management device 2 determines the representative power value by handling the reception time of the measurement data as the measurement time corresponding to the measurement data. However, when time information is included in measurement data from a device that measures power, the representative power value may be determined by handling such time information as the measurement time.

  Further, the energy management device 2 may switch whether to display the power information using the representative power value according to a user operation. Alternatively, the energy management device 2 may allow the above switching in the maintenance mode, and prohibit the switching in a case other than the maintenance mode.

  In the above embodiment, the operation terminal 3 has played a role of an interface between the energy management device 2 and the user. However, the energy management device 2 has an input device for accepting an operation from the user and a user. An output device for presenting information may be included.

  Moreover, you may make it the one part process which the energy management apparatus 2 performed in said embodiment perform with another apparatus. FIG. 16 shows the overall configuration of the energy management system 1 in this case.

  In FIG. 16, a router 13 is a broadband router, and is connected to the energy management apparatus 2 via a LAN cable so as to be communicable. The communication interface 21 of the energy management apparatus 2 further includes a NIC for wide area communication, and is connected to the wide area network N via the router 13 to perform data communication with the server 14. The server 14 is a so-called cloud server for HEMS that is managed by a vendor or the like of the energy management device 2.

  In the above case, the energy management device 2 periodically transmits the first measurement data and the second measurement data acquired from the power measurement device 4 and the EV-PCS 5 to the server 14. The server 14 has a function equivalent to that of the representative power data generation unit 202 and / or the power information generation unit 203. The server 14 generates the above-described first representative power data table, second representative power data table, and power information based on the first measurement data and the second measurement data sent from the energy management device 2. Then, the generated result may be transmitted to the energy management device 2.

  In the above embodiment, the case where the energy management device 2 is installed in the house H has been described. However, a device having the same function as that of the energy management device 2 may be installed outside the house H.

  The overall configuration of the energy management system 1 in this case is shown in FIG. In the energy management system 1 illustrated in FIG. 17, unlike the configuration illustrated in FIG. 16, the energy management apparatus 2 is not installed in the house H. In this case, the router 13 and the server 14 cooperate to play the role of the energy management device 2.

  In the above-described embodiment, one or more programs stored in the secondary storage device 24 are executed by the CPU 20, thereby realizing each functional unit (see FIG. 6) of the energy management device 2. However, all or a part of the functional units of the energy management device 2 may be realized by dedicated hardware. The dedicated hardware is, for example, a single circuit, a composite circuit, a programmed processor, an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a combination thereof.

  Further, the present invention is not limited to a house, and can be employed in an energy management system installed in, for example, an office building or a factory.

  In the above embodiment, the program executed by the energy management apparatus 2 is a CD-ROM (Compact Disc Read Only Memory), a DVD (Digital Versatile Disc), an MO (Magneto-Optical Disk), or a USB (Universal Serial Bus). It is also possible to store and distribute in a computer-readable recording medium such as a memory or a memory card. And it is also possible to make the said computer function as the energy management apparatus 2 in the said embodiment by installing this program in specific or a general purpose computer.

  Further, the above program may be stored in a disk device or the like included in a server device on a communication network such as the Internet, and may be downloaded onto a computer, for example, superimposed on a carrier wave. Or you may achieve the above-mentioned process by starting and executing, transferring a program via a communication network. Furthermore, the above-described processing may be achieved by executing all or part of the program on the server device and executing the program while the computer transmits and receives information regarding the processing via a communication network.

  Note that when the above functions are realized by sharing an OS (Operating System) or when the functions are realized by cooperation between the OS and an application, only the parts other than the OS are stored in the recording medium and distributed. Alternatively, it may be downloaded to a computer.

  Various embodiments and modifications can be made to the present invention without departing from the broad spirit and scope. Further, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention. That is, the scope of the present invention is shown not by the embodiments but by the claims. Various modifications within the scope of the claims and within the scope of the equivalent invention are considered to be within the scope of the present invention.

  The present invention can be suitably employed in a system for managing power used in a building.

  DESCRIPTION OF SYMBOLS 1 Energy management system, 2 Energy management apparatus, 3 Operation terminal, 4 Electric power measurement apparatus, 5 EV-PCS, 6 PV-PCS, 7 (7-1, 7-2, ...) Equipment, 8 Commercial power supply, 9 Power distribution Panel, 10 EV, 11 Storage battery, 12 PV panel, 13 Router, 14 Server, 20 CPU, 21 Communication interface, 22 ROM, 23 RAM, 24 Secondary storage device, 25 Bus, 200 User interface unit, 201 Measurement data acquisition unit 202 representative power data generation unit, 203 power information generation unit, 204 display instruction unit, 240 measurement history DB, 241 parameter table, D1 to D6 power line

Claims (5)

First measurement data including each measured power of one or a plurality of power lines included in the first power line group is acquired from the first measurement apparatus, and then transferred from the second measurement apparatus to the second power line group. Measurement data acquisition means for acquiring second measurement data including each measured power of one or a plurality of power lines included;
The first measurement data for a predetermined period is statistically processed to determine a first representative power that is representative of the total power of the first power line group, and the second measurement data for the predetermined period Representative power determination means for statistically processing measurement data to determine a second representative power that is representative of the total power of the second power line group;
An energy management apparatus comprising: information output means for outputting power information including information indicating a transition of the first representative power and a transition of the second representative power to a display device. The measurement data acquisition means, when acquiring the first measurement data and the second measurement data, gives the acquired time as a measurement time to the first measurement data and the second measurement data, The energy management apparatus according to claim 1 . The representative power determining means determines the first representative power and the second representative power by calculating a moving average in a period of said predetermined energy management apparatus according to claim 1 or 2. From the first measurement device, obtain first measurement data including each measured power of one or more power lines included in the first power line group,
From the second measurement device, obtain second measurement data including each measured power of one or more power lines included in the second power line group,
The first measurement data for a predetermined period is statistically processed to determine a first representative power that is representative of the total power of the first power line group, and the second measurement data for the predetermined period Statistically processing the measurement data to determine a second representative power representative of the total power of the second power line group;
A power information display method for outputting, to a display device, power information including information indicating a transition of the first representative power and a transition of the second representative power. Computer
First measurement data including each measured power of one or a plurality of power lines included in the first power line group is acquired from the first measurement apparatus, and then transferred from the second measurement apparatus to the second power line group. Measurement data acquisition means for acquiring second measurement data including each measured power of one or more power lines included;
The first measurement data for a predetermined period is statistically processed to determine a first representative power that is representative of the total power of the first power line group, and the second measurement data for the predetermined period Representative power determining means for statistically processing measurement data to determine a second representative power that is representative of the total power of the second power line group;
A program that functions as information output means for outputting power information including information indicating a transition of the first representative power and a transition of the second representative power to a display device.

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