WO2013161154A1

WO2013161154A1 - Energy management device, energy management system and program

Info

Publication number: WO2013161154A1
Application number: PCT/JP2013/001426
Authority: WO
Inventors: 清隆竹原
Original assignee: パナソニック株式会社
Priority date: 2012-04-26
Filing date: 2013-03-07
Publication date: 2013-10-31
Also published as: JP2013230045A; JP5945820B2

Abstract

A target setting unit sets as an absolute target value a restriction target with regard to a reference value, that is found from the results of the same month of the previous year, and a monitoring period in respect of the amount of power used in a consumer's home in the monitoring period. A substitution unit performs substitution processing to substitute the absolute target value by a relative target value, which is a target reduction with regard to the results regarding the amount of use of power in the consumer's home in a previous results period. Three different types of results period may be selected constituting periods within a prescribed previous range starting from the present, namely, for example, the previous month, the previous week or the previous day. A display unit displays the absolute target value and the relative target value to the user.

Description

Energy management device, energy management system, program

The present invention relates to an energy management device, an energy management system, and a program used to limit the amount of power used by a power consumer.

Conventionally, by setting a target value for the amount of power used by consumers and displaying the set target value and the actual value of the amount of power used by the customer in a comparable manner, the amount of power used is reduced. In this way, techniques for raising awareness among consumers have been proposed.

For example, in Japanese Patent Publication No. 2008-92680, a target value is set based on the actual value (history information) of the same month in the previous year or the actual value of the previous month (previous month), and the target value of this month is set in the content of the website. And displaying the actual value of the current power consumption (electric power consumption). Specifically, the target value and the actual value are displayed as a bar graph, and the target value for this month is displayed as a numerical value. Thereby, the user can promote energy saving (energy saving) by refraining from using the load device (electric device) so as to reduce the amount of power used.

By the way, in the above document, although the target value set based on the past past actual value such as the same month in the previous year or the previous month is presented, the reduction target for the near past actual value such as last week or the previous day is presented. Is not described.

However, in general, the daily life pattern of how much load equipment is used by consumers changes from moment to moment, so users only use the target value compared with the actual value of the same month last year or last month. There is a problem that it is difficult to realize how much should be reduced. In other words, even though the user remembers the past life patterns such as the previous week and the previous day, the user often forgets the distant past life patterns. There is a high possibility that it will not be understood how much the target value can be achieved.

Therefore, an object of the present invention is to provide an energy management device, an energy management system, and a program that allow a user to easily understand how much a load device should be used to achieve a target value.

The energy management device according to the present invention sets an acquisition unit that acquires a measured value of power consumption at a consumer from the measurement device, and sets a reduction target with respect to a reference value as an absolute target value for the power consumption at the consumer in a target period. A target setting unit, a result storage unit that stores the actual value of the amount of electric power used by the customer in the actual period included in the past predetermined range starting from the present, and the absolute target value as the actual value of the actual period A replacement unit that replaces the target value with a relative target value that is a reduction target, and a presentation unit that presents the absolute target value and the relative target value.

In this energy management apparatus, the target setting unit sets a reduction rate of the used power amount from the reference value as the absolute target value, and the replacement unit uses the used power amount for the absolute target value from the reference value. It is desirable to obtain a first value obtained by subtracting, and to use a reduction rate when reducing the amount of power used from the actual value in the actual period to the first value as the relative target value.

In this energy management apparatus, the actual period is a predetermined period immediately before the presentation unit presents, and the replacement unit sets a reduction target for the actual value excluding an abnormal value of the actual period as the relative target. It is more desirable to set the value.

Alternatively, in this energy management apparatus, it is preferable that the replacement unit sets the previous day of presentation by the presentation unit as the relative target value as the performance period.

The energy management system of the present invention includes the measuring device attached to a distribution board installed in a consumer or a load device used by the consumer and measuring the amount of electric power, and the energy management device described above. Features.

The program according to the present invention includes a computer, an acquisition unit that acquires a measured value of power consumption at a consumer from a measurement device, and power consumption of a consumer during a performance period included in a predetermined range in the past starting from the present. A result storage unit for storing the actual value, a target setting unit for setting a reduction target with respect to a reference value as an absolute target value for the amount of electric power used by consumers in the target period, and the absolute target value for the actual result of the actual period It is made to function as an energy management device including a replacement unit that replaces a relative target value that is a reduction target for a value, and a presentation unit that presents the absolute target value and the relative target value. Alternatively, the present invention is not limited to a program, and may be a computer-readable storage medium storing the program.

In the present invention, the replacement unit replaces the absolute target value with a relative target value that is a reduction target with respect to the actual value of the actual period, and the presentation unit presents the absolute target value and the relative target value. If the degree is refrained, there is an advantage that it is easy to understand whether the target value can be achieved.

Preferred embodiments of the invention are described in further detail. Other features and advantages of the present invention will be better understood with reference to the following detailed description and accompanying drawings.
It is a block diagram which shows the controller of the energy management apparatus which concerns on this embodiment. It is a lineblock diagram showing an example of an energy management system concerning this embodiment. It is a block diagram which shows the principal part of the energy management system which concerns on this embodiment. It is a figure which shows the example of data of the target storage part used by this embodiment. It is a figure which shows the example of data of the performance memory | storage part used by this embodiment. It is a figure which shows the example of data of the reference value storage part used by this embodiment. It is a figure which shows the example of a display of the energy management apparatus which concerns on this embodiment. It is a figure which shows the other example of a display of the energy management apparatus which concerns on this embodiment. It is a figure which shows the other example of a display of the energy management apparatus which concerns on this embodiment. It is a figure which shows the other example of a display of the energy management apparatus which concerns on this embodiment.

In the following embodiments, a case where the energy management system is used for a general detached house as a consumer of electric power will be described as an example. However, the energy management system is not limited to a detached house, for example, an individual of an apartment house. It may be used for dwelling units, offices, stores, etc. In any case, if the consumer is conscious of reducing the amount of power used, the amount of power used can be limited by introducing an energy management system described below.

In the consumer, as shown in FIG. 2, a distribution board 2 is arranged, and a power line L <b> 1 that supplies power from the power supply system 3 of the commercial power source to the distribution board 2 and a load device in the house (not shown). ) Are connected to a plurality of power lines L2. The energy management system of the present embodiment includes a measuring device 4 attached to the distribution board 2 for measuring the amount of power used by the main circuit, and an energy management device 1 for acquiring the amount of power measured by the measuring device 4 as a measured value. It has.

Furthermore, the energy management device 1 is configured to be able to communicate with the host device 5 via a communication network NT such as the Internet. The host device 5 is, for example, a computer server, and is managed (operated) by a power company that performs dispatched power or a service provider that performs power management on behalf of the power company. The host device 5 is a function for notifying the energy management device 1 of a reduction request (demand) for requesting reduction of the amount of power used in a certain period of time by a consumer in accordance with the power supply status from the power company. have.

The reduction request here represents the reduction target with respect to the reference value described later for the amount of power used by consumers in the target period, at least the target period that represents the target period for power reduction, the specific reduction rate, etc. Reduction target that represents the numerical value of. As a reduction request notified from the electric power company, for example, there is a reduction request such as “Please cooperate for power saving of 10% or more from 9:00 to 21:00 on weekdays from March 1st to May 31st”. . This reduction request requires that the reduction target of “10% or more power saving” is achieved in the target period “between March 1st and May 31st, from 9:00 to 21:00”.

As shown in FIG. 3, the distribution board 2 is connected to the main breaker 21 connected to the power line L1 for supplying power from the power supply system 3, and to the secondary side of the main breaker 21 via the conductor L3. A plurality of branch breakers 22 are provided. A load device is connected to the secondary side of the branch breaker 22 via a plurality of power lines L2. In the example of FIG. 3, not only the power supply system 3 but also a private power generation device such as a solar power generation device or a fuel cell, or a power storage device may be further connected to the primary side of the main breaker 21. In the present embodiment, the power line L1 on the primary side of the main breaker 21 and the conductor L3 on the secondary side correspond to the main circuit, and each power line L2 corresponds to the branch circuit.

As shown in FIG. 3, the measuring device 4 includes a detection unit 41 that detects the output of the power sensor S0 provided in the conductor L3 as the main circuit, and the amount of power that passes through the conductor L3 from the output of the detection unit 41 And an arithmetic unit 42 for obtaining. Furthermore, the measurement device 4 includes a communication unit 43 that transmits the amount of power obtained by the calculation unit 42 to the energy management device 1 as a measurement value.

In the present embodiment, a current sensor composed of a current transformer is used as the power sensor S0 in order to easily measure the amount of power by the measuring device 4. However, in order to increase the measurement accuracy of the electric energy, the power sensor S0 is preferably configured to measure both current and voltage. Further, as shown in FIG. 3, the power sensor S <b> 0 is provided on the conductor L <b> 3 on the secondary side of the main breaker 21, but may be provided on the power line L <b> 1 on the primary side of the main breaker 21. .

The detection unit 41 has a function of performing pre-processing such as offset adjustment, noise removal, and amplification on the output of the power sensor S0, and AD conversion that converts the pre-processed signal into a digital signal. The calculation unit 42 is mainly configured of a device that operates by executing a program, such as a microcomputer. The communication unit 43 preferably performs wireless communication, but may be configured to perform wired communication. The amount of power measured by the measuring device 4 is the amount of power in a sampling time (for example, 1 minute), and the measuring device 4 sequentially transmits the amount of power for each sampling time to the energy management device 1 as a measured value.

Here, in the illustrated example, the measuring device 4 measures the amount of electric power in units of a main circuit (that is, the power line L1 and the conductor L3) attached to the distribution board 2 and connected to the main circuit breaker 21. With the above configuration, the measuring device 4 can measure the amount of power that has passed through the main circuit. Hereinafter, the amount of power that has passed through the main circuit is referred to as the amount of power used by the consumer.

However, the measurement device 4 is not limited to this configuration, and the measurement device 4 includes a configuration in which a current sensor is attached to the branch circuit (that is, the power line L2) connected to the branch breaker 22 to measure the amount of power in units of the branch circuit, A configuration may be adopted in which the amount of electric power is measured for each load device by attaching a current sensor. The measuring device 4 may be configured to measure the amount of power in units of outlets by attaching a current sensor to an outlet (not shown) connected to the power line L2. Even with such a configuration, the measuring device 4 can measure the amount of power that has passed through the main circuit, that is, the amount of power used by the consumer, from the total amount of power of all branch circuits (or load devices, outlets). .

As shown in FIG. 2, the energy management device 1 includes a controller 11 that communicates with the measurement device 4 and an operation display device 12 as a user interface that communicates with the controller 11. The operation display device 12 has a function as a display for displaying information obtained by the controller 11 and an operation unit for giving an instruction to the controller 11. Here, the operation display device 12 is composed of a flat panel display such as a liquid crystal display and a mechanical switch such as a push button switch. The display device and the operation device may be configured by a touch panel. The operation display device 12 also includes a circuit unit for operating the display unit and the operation unit.

As shown in FIG. 1, the controller 11 includes a processing unit 110 that performs processing for limiting the amount of power used by a consumer, a communication unit 111 that communicates with other devices, a storage unit 112, and the current date and time. And a real time clock (RTC) 113 for measuring the time.

The communication unit 111 includes a communication interface unit 1111 as an acquisition unit that acquires measurement values from the measurement device 4 through communication with the measurement device 4. Hereinafter, the “communication interface unit” is abbreviated as “communication I / F”. Further, the communication unit 111 includes a communication I / F 1112 for communicating with the operation display device 12 and a communication I / F 1113 connected to the communication network NT and communicating with the host device 5. Here, the energy management device 1 receives a reduction target for the reference value of the amount of power used by the consumer in the target period from the host device 5 through the communication I / F 1113 or the operation of the operation display device 12 by the user. Accordingly, the data is input through the communication I / F 1112. Therefore, the reduction target is determined by the user's intention or a request from the electric power company or the like, and the communication I / F 1113 or the communication I / F 1112 functions as a target input unit to which the reduction target is input.

Further, the communication unit 111 communicates with a communication I / F 1114 that communicates with the distribution board 2 in order to remotely control the branch breaker 21 in the distribution board 2, and communicates with a load apparatus in order to control and monitor the load apparatus. And a communication I / F 1115 for performing.

Meanwhile, the storage unit 112 stores a target storage unit 1121 that stores a target period and a reduction target, a result storage unit 1122 that stores a record of power consumption at a consumer, and a reference value that serves as a reference for a reduction target. And a reference value storage unit 1123.

As shown in FIG. 4, the target storage unit 1121 stores the input target period (including date and time) and the content of reduction in the communication I / F 1113 or the communication I / F 1112 as the target input unit. In the illustrated example, the target storage unit 1121 has a time period “9:00” (start time) to “21:00” (from “July 1” (start date) to “September 30” (end date)). End time) is the target period, and a reduction rate of 10% with respect to the reference value is stored as a reduction target. That is, in the present embodiment, as an example, the target storage unit 1121 uses the amount of power used by the customer in the target period (the time period from 9:00 to 21:00 from July 1 to September 30). A reduction target of 10% or more from an appropriately determined reference value is stored.

As shown in FIG. 5, the actual result storage unit 1122 stores the actual value of the integrated power (the amount of power used by the customer) of the main circuit every unit time (for example, one hour). In other words, the performance storage unit 1122 stores the amount of power used per unit time based on the measurement value acquired from the measurement device 4 by the communication I / F 1111 as the acquisition unit. Since the energy management device 1 sequentially acquires the amount of power for each sampling time (for example, 1 minute) from the measurement device 4 as a measured value, the measured value acquired at the sampling time interval is sequentially added for each unit time. Obtain the amount of power used per unit time.

In the example of FIG. 5, the amount of power used (integrated power) in the unit time (described as “2011.07.25 08:00”) on the 8:00 am (8:00 to 8:59) on July 25, 2011. “1.25 kWh” is stored in the result storage unit 1122. In the example of FIG. 5, the power consumption at 9 o'clock on July 25, 2011 is “1.15 kWh”, and the power consumption at 10 o'clock on the same day is “1.05 kWh”. Furthermore, the power consumption at 10:00 on August 1, 2011 is “2.05 kWh”, the power consumption at 11:00 on the same day is “2.05 kWh”, and the power consumption at 12:00 on the same day is “4. 05 kWh ".

Here, the processing unit 110 writes the actual value of the electric energy per unit time in the actual result storage unit 1122 along the time series at every hour on the hour counted by the real time clock 113. The performance storage unit 1122 has a storage capacity for storing a history for one year. The relationship between these times is merely an example, and the time interval for writing the history in the result storage unit 1122 may be several hours instead of one hour, and the history stored in the result storage unit 1122 is one year. It may be several years instead of minutes.

As shown in FIG. 6, the reference value storage unit 1123 stores the amount of electric power used by consumers as a reference for reduction targets as a reference value. In the example of FIG. 6, four types of values “long-term reference value”, “medium-term reference value”, “short-term reference value”, and “ultra-short-term reference value” are shown. Only the “long-term reference value” is used as the reference for the reduction target stored in. Hereinafter, simply referring to “reference value” means “long-term reference value”. The remaining “medium-term reference value”, “short-term reference value”, and “ultra-short-term reference value” are values that serve as references for reduction targets as relative target values to be described later. In the illustrated example, “32” is stored as the reference value (long-term reference value), “30.3” as the medium-term reference value, “28.8” as the short-term reference value, and “36.0” as the ultra-short-term reference value. Stored in the unit 1123.

The reference value (long-term reference value) stored in the reference value storage unit 1123 is obtained in principle from the history of power consumption (past actual value) in the consumer. In the present embodiment, when this year is assumed to be 2012, the same period (7 to 12:00 time period from July 1 to September 30) and the same month (7 (September) is the standard. That is, the reference value is obtained from the actual value of the same month of the previous period of the target period, for example, the average value of the actual values is obtained as the reference value. As a result, the reduction target (reduction rate of 10%) means that the amount of power used by consumers in the target period is reduced by 10% or more compared to the same month of the previous year.

In the present embodiment, the reference value is a time period from 9:00 to 21:00 stored in the result storage unit 1122 for the three months from July 1 to September 30 of the previous year. It consists of an average value per day obtained from actual values. In short, the reference value “32” illustrated in FIG. 6 is the power used by consumers in the time zone from 9:00 to 21:00 during the three months from July 1 to September 30, 2011. The average amount is 32 kWh per day. However, the reference value is not limited to a value obtained from a past actual value, and may be a value given as a standard value based on, for example, a family structure of a customer.

Here, the controller 11 mainly includes a device that operates by executing a program, such as a microcomputer, and realizes functions of each unit by executing an appropriate program. As shown in FIG. 1, a communication unit 111, a storage unit 112, and a real time clock 113 are connected to the processing unit 110.

In the present embodiment, the processing unit 110 includes a target setting unit 1101 that sets a reduction target with respect to a reference value for the target period as an absolute target value, a replacement unit 1102 that replaces the absolute target value with a relative target value described later, an absolute target value, and And a presentation unit 1103 for presenting the relative target value.

The target setting unit 1101 sets this reduction target as an absolute target value by writing the reduction target input to the target input unit (communication I / F 1113 or communication I / F 1112) in the target storage unit 1121. That is, the absolute target value is a value that represents a reduction target with respect to the reference value with respect to the amount of power used by the consumer in the target period, and here is a reduction rate with respect to the power amount that is the reference value. Since the absolute target value is the reduction target itself input to the target input unit (communication I / F 1113 or communication I / F 1112), once it is set by the target setting unit 1101, the next new reduction target is input. It will not change until it is done.

Here, since the reference value (long-term reference value) stored in the reference value storage unit 1123 is a value obtained from the history of power consumption in the consumer (past actual value) as described above, it is an absolute target value. And the reference value, the amount of power used by the consumer as the target for the target period is calculated. That is, the target power consumption for the target period (hereinafter referred to as target integrated power) is reduced by the reduction rate indicated by the reduction target from the average (reference value) of the actual values for the target period and the same month of the previous year (July to September). It is expressed by the amount of electric power.

Therefore, the replacement unit 1102 obtains the target integrated power by subtracting the amount of power used for the absolute target value from the reference value using the absolute target value and the reference value. As a specific example, if the reference value is 32 and the reduction target is a reduction rate of 10%, the replacement unit 1102 obtains 28.8 (kWh) as a target integrated power from 32 × (1-0.1). In this target integrated power, the total amount of power used by consumers in the time zone from 9:00 to 21:00 per day represents the target value, and the actual power consumed by consumers is the target period. A reduction target (reduction rate of 10%) is achieved if the overall power is kept below the target integrated power.

Also, the replacement unit 1102 performs a replacement process in which the absolute target value set by the target setting unit 1101 is replaced with a relative target value that is a reduction target with respect to the actual value of power consumption of the customer in the past actual period. The relative target value here is a relative target value set with respect to the actual value of the actual period. Unlike the absolute target value, it is a target value that changes depending on which period is the actual period. .

The actual period is a period included in the past predetermined range starting from the present, and is a relatively close past period in which the user remembers to some extent how the load device was used, for example, the present It consists of a period included in the range up to the point of 2 months from the date. In other words, a past period that is close to the extent that the user remembers (remembers) the situation at that time is defined as the actual period. In the present embodiment, as an example, the energy management device 1 is configured to be able to select a performance period from three types of last month, last week, and the previous day. In other words, the energy management device 1 is configured to be able to select a performance period from the last month, last week, and the previous day starting from the present.

Here, the replacement unit 1102 uses the actual value of the actual period stored in the actual result storage unit 1122 as a reference for the relative target value so that the actual value of the amount of power used by the customer in the actual period is used as a reference. The medium-term reference value, the short-term reference value, and the ultra-short-term reference value as shown in FIG. The medium-term reference value is obtained from the last month actual value as the actual period, the short-term reference value is obtained from the last week actual value as the actual period, and the ultra-short-term standard value is obtained from the previous day actual value as the actual period.

In the present embodiment, the medium-term reference value is from 9:00 to 21:00 stored in the result storage unit 1122 for the last month (for example, July 1 to July 31 if it is currently August). It consists of the average value per day obtained from the actual value in the time zone. In short, the mid-term reference value “30.3” illustrated in FIG. 6 indicates that the average amount of power used by consumers in the time zone from 9:00 to 21:00 last month is 30.3 kWh per day. ing.

Similarly, the short-term reference value is the time from 9:00 to 21:00 stored in the result storage unit 1122 for the seven days of last week (for example, the second week of the same month if it is the third week of August). It consists of the average value per day calculated from the actual value of the belt. In short, the short-term reference value “28.8” illustrated in FIG. 6 indicates that the average amount of power used by consumers in the time zone from 9:00 to 21:00 last week is 28.8 kWh per day. ing.

In addition, the ultra-short-term reference value is the actual value in the time zone from 9:00 to 21:00 stored in the actual result storage unit 1122 for the previous day (for example, August 19 if it is currently August 20). Consists of. In short, the ultra-short-term reference value “36.0” illustrated in FIG. 6 indicates that the amount of power used by consumers in the time zone from 9:00 to 21:00 on the previous day was 36.0 kWh. .

When the replacement unit 1102 arrives at a fixed time every day (for example, 12:00), the reference value storage unit 1123 shows the medium-term reference value, the short-term reference value, and the ultra-short-term reference value obtained as described above in the form shown in FIG. To store. However, since the short-term reference value does not change for one week and the medium-term reference value does not change for one month, the replacement unit 1102 updates only the ultra-short-term reference value every day, and the short-term reference value for one week. The medium-term reference value may be updated every month.

The replacement unit 1102 replaces the absolute target value with the relative target value for each performance period using the medium-term reference value, the short-term reference value, and the ultra-short-term reference value stored in the reference value storage unit 1123. Specifically, the replacement unit 1102 first obtains a first value obtained by subtracting the amount of power used for the absolute target value from the reference value (long-term reference value), that is, the target integrated power as described above. Then, the replacement unit 1102 calculates, as a relative target value, the reduction rate of the first value (target integrated power) with respect to the actual values (medium-term reference value, short-term reference value, and ultra-short-term reference value) in the actual period. That is, the replacement unit 1102 calculates, as a relative target value, a reduction rate for reducing the amount of power used from the actual value of the actual period to the first value.

For example, if the medium-term reference value is 30.3 kWh and the target integrated power is 28.8 kWh, the replacement unit 1102 calculates 5% from (1-28.8 / 30.3) × 100 relative to the previous month, which is the actual period. Obtained as the target value. Similarly, if the short-term reference value is 28.8 kWh and the target integrated power is 28.8 kWh, the replacement unit 1102 uses (1-28.8 / 28.8) × 100 to 0% with respect to the last week that is the actual period. Obtained as a relative target value. Also, if the ultra-short-term reference value is 36.0 kWh and the target integrated power is 28.8 kWh, the replacement unit 1102 calculates 20% from the previous day, which is the actual period, from (1-28.8 / 36.0) × 100. Obtained as a relative target value.

As described above, the replacement unit 1102 can replace the absolute target value with the relative target value, which is a reduction target for the actual value of the actual period, for each actual period (for example, last month, last week, and the previous day).

When the absolute target value is set as described above and the replacement process from the absolute target value to the relative target value is performed, the presenting unit 1103 presents the absolute target value and the relative target value to the user. The presenting unit 1103 displays the absolute target value and the relative target value on the operation display device 12 through the communication I / F 1112 or by displaying or outputting them on a load device such as a television through the communication I / F 1115. At this time, the presentation unit 1103 collectively presents not only the absolute target value and the relative target value, but also the time zone, the target integrated power, and the like that are targets for power reduction.

As shown in FIGS. 7 and 8A to 8C, the presentation unit 1103 displays the cell c1 representing the absolute target value (demand reduction target) and the start of the target time zone (demand target time) on the display screen 121 of the operation display device 12. A cell c2 representing the time, a cell c3 representing the end time, and a cell c4 representing the target integrated power are displayed. At this time, the display screen 121 further displays a cell c5 representing a relative value (demand standard) obtained by comparing the target integrated power with an actual value for a certain period, and a cell c6 representing the certain period.

Here, in FIGS. 8A to 8C to be described later, the actual period (last month, last week, and the previous day) is selected as the certain period, so the relative value (demand reference) of the cell c5 is the above-mentioned “relative target value”. is there. On the other hand, in FIG. 7, since “the same month last year”, which is the target period of the reference value (long-term reference value), is selected as the certain period, the relative value (demand reference) of the cell c5 is substantially “relative target value”. is not. In other words, in FIG. 7, the period (cell c6) that is the comparison target of the relative value is “the same month last year”, so the relative value is a reduction target that compares the reference value (long-term reference value) with the target integrated power, That is, it is equal to the absolute target value. Therefore, in the example of FIG. 7, 10% of the cell c1 and −10% of the cell c5 have the same absolute value. Note that the cell c1 indicates a target power consumption reduction rate. In cell c5, the sign of “10%” displayed in cell c5 is displayed as “−” in order to easily show the user that the target integrated power is reached by reducing 10% of the actual value of “last month”. (Minus).

Here, when the user performs a specific operation on the operation display device 12, the presentation unit 1103 receives an instruction from the operation display device 12 through the communication I / F 1112 and displays an operation so that the relative target value is displayed. Processing for switching the display screen 121 of the apparatus 12 is performed. As a result, the display screen 121 of the operation display device 12 displays the relative target value in the cell c5, as shown in FIGS. 8A to 8C, in which the contents of the cells c5 and c6 are different from the display screen 121 of FIG. Note that the contents of the cells c1 to c4 are the same as those of the display screen 121 of FIGS. 8A to 8C in the display screen 121 of FIGS.

In the example of FIG. 8A, the display screen 121 displays the actual period (cell c6) as “last month” and the relative target value (here, “−5”%), which is a reduction target for the actual value of the previous month, is displayed in the cell c5. ing. That is, according to this display screen 121, the user can determine that the load device should be used so that the amount of power used can be reduced by a little (5%) compared to the previous month. 8A, when the user performs a specific operation on the operation display device 12, the presentation unit 1103 receives an instruction from the operation display device 12 through the communication I / F 1112, and the display screen of the operation display device 12 A process of switching 121 as shown in FIG. 8B is performed.

In the example of FIG. 8B, the display screen 121 displays the relative target value (here, “0”%), which is a reduction target with respect to the actual value of the previous week, in the cell c5 with the actual period (cell c6) as “last week”. Yes. According to this display screen 121, the user can determine that the load device should be used so that the amount of power used is the same as last week. When the user performs a specific operation on the operation display device 12 in the state of FIG. 8B, the presentation unit 1103 receives an instruction from the operation display device 12 through the communication I / F 1112, and the display screen 121 of the operation display device 12. Is switched as shown in FIG. 8C.

In the example of FIG. 8C, the display screen 121 displays the actual target period (cell c6) as “previous day” and the relative target value (here, “−20”%) that is a reduction target with respect to the actual value of the previous day is displayed in the cell c5. ing. According to this display screen 121, the user can determine that the load device should be used so that a slightly larger amount (20%) of power consumption can be reduced compared to the previous day. 8C, when the user performs a specific operation on the operation display device 12, the presentation unit 1103 receives an instruction from the operation display device 12 through the communication I / F 1112, and the display screen of the operation display device 12 A process of switching 121 as shown in FIG. 7 is performed.

In the example of FIGS. 8A and 8C, in cell c5, display is made in cell c5 in order to easily show the user that the target integrated power is reached by reducing 5% and 20% of the actual value of the actual period. The sign of “5%” and “20%” is “−” (minus), and represents the reduction rate that is the reduction target as with the absolute target value.

In the above-described example, the configuration in which the display screen 121 is sequentially switched each time the user performs an operation on the operation display device 12 is illustrated. However, the presenting unit 1103 is not limited to this configuration, and the display screen 121 is displayed in accordance with the user operation. Any configuration that can be switched is acceptable. For example, the operation display device 12 is operated so that the user selects the period displayed in the cell c6 from “the same month last year”, “last month”, “last week”, and “the previous day”, and the presenting unit 1103 selects the selected period A relative value and a relative target value may be displayed in the cell c5.

Furthermore, the presentation unit 1103 may be configured to simultaneously display relative target values for a plurality of performance periods as shown in FIGS. 8A to 8C on the same display screen 121, for example. Thereby, the user can confirm relative target values for a plurality of performance periods such as “Last month”, “Last week”, and “Previous day” at a time, and the convenience is further improved.

According to the energy management system of the present embodiment described above, the energy management apparatus 1 includes the replacement unit 1102 that replaces the absolute target value with a relative target value that is a reduction target with respect to the actual value of the actual period, and is relative to the absolute target value. Both the target value and the target value are presented by the presentation unit 1103. Here, since the actual period is a period included in the past predetermined range starting from the present, the relative target value is a past actual value that is close to the extent that the user remembers (remembers) the situation at that time. It becomes an index that expresses the reduction target by contrast. Therefore, by presenting the relative target value, the user can receive the reduction target in comparison with the past past actual value that is still new to memory, and the action for energy saving (power saving) (hereinafter referred to as energy saving). It becomes easy to take action).

In short, users will be able to easily realize how much energy they should use by presenting reduction targets in comparison with past past performance values, and how much they should refrain from using load equipment. It is easy to understand whether the target value can be achieved. For example, if the actual period is last week, it shows how much power consumption should be reduced with respect to the actual value of the last week, so the user's life pattern such as how much load equipment was used by the user last week. By contrast, it becomes easy to take appropriate energy saving action. In particular, when the presentation unit 1103 presents the day before the presentation as a performance period, the user can determine the content of the necessary energy saving action in comparison with the most recent life pattern of the previous day. It becomes easy to take energy saving action.

In addition, if the user has already taken energy-saving action during the performance period, the relative target value is whether the energy-saving action during the performance period is sufficient to achieve the absolute target value, that is, the energy-saving action taken during the performance period. It becomes an index that represents the excess and deficiency of actions. Therefore, the user can take the energy saving action necessary for achieving the absolute target value based on the past excess or deficiency of the energy saving action that is still new to memory.

Further, in the present embodiment, the absolute target value is a reduction rate of the used power amount from the reference value, and the replacement unit 1102 calculates the target integrated power (first value obtained by subtracting the used power amount for the absolute target value from the reference value. And the reduction rate of the target integrated power with respect to the actual value in the actual period is obtained as a relative target value. In other words, since the relative target value is expressed in the form of a reduction rate of the used electric energy with respect to the past past actual value, the user is compared with the case where only the absolute target value indicating the reduction rate of the used electric energy with respect to the reference value is presented. Thus, it is easy to grasp how much the power consumption should be reduced by the relative target value.

By the way, the actual period is not limited to the above-mentioned periods such as “Last month”, “Last week” and “Previous day”, but for example, the period of the most recent one month starting from the present, the last one week starting from the present It may be the nearest predetermined period in which the presentation unit 1103 presents, such as a period. In this case, the replacement unit 1102 does not set the relative target value based on all the actual values in the actual period, but sets the relative target value only based on the actual value excluding the abnormal value in the actual period. May be.

In other words, for example, when the period of one month retroactive from the present is used as the actual period, the replacement unit 1102 takes the average of the actual values excluding abnormal values in the actual period, and sets the first value (target integrated value) for the average value. Power) as a relative target value. In this case, the abnormal value includes, for example, a day when the user is absent due to travel, a day when a holiday, etc. takes a different life pattern from a weekday. The replacement unit 1102 can determine whether the value is an abnormal value by comparing the actual value with a predetermined allowable range. If the actual value is out of the allowable range, the replacement unit 1102 determines that the abnormal value is an abnormal value.

As described above, the replacement unit 1102 sets the relative target value from the actual value excluding the abnormal value by setting the relative predetermined value from the actual value excluding the abnormal value as the actual predetermined period. This makes it easier to take appropriate energy-saving actions.

While the invention has been described in terms of several preferred embodiments, various modifications and variations can be made by those skilled in the art without departing from the true spirit and scope of the invention, ie, the claims.

Claims

An acquisition unit for acquiring a measurement value of power consumption in a consumer from a measurement device;
A target setting unit that sets a reduction target with respect to a reference value as an absolute target value for the amount of power used by consumers in a target period;
A record storage unit that stores a record of the actual value of power used by consumers in a record period included in the past predetermined range starting from the present;
A replacement unit that replaces the absolute target value with a relative target value that is a reduction target for the actual value in the actual period;
An energy management apparatus comprising: a presentation unit that presents the absolute target value and the relative target value.
The target setting unit sets a power consumption reduction rate from the reference value as the absolute target value,
The replacement unit obtains a first value obtained by subtracting the amount of power used for the absolute target value from the reference value, and reduces the amount of power used from the actual value of the actual period to the first value. The energy management apparatus according to claim 1, wherein a reduction rate is set as the relative target value.
The performance period is the most recent predetermined period in which the presentation unit presents,
The energy management device according to claim 1, wherein the replacement unit sets a reduction target for the actual value excluding an abnormal value in the actual period as the relative target value.
The energy management device according to claim 1 or 2, wherein the replacement unit sets the relative target value as the actual period of the day before the presentation unit performs presentation.
The measuring device attached to a distribution board installed in a consumer or a load device used in a consumer and measuring the amount of power; and
An energy management system comprising the energy management device according to any one of claims 1 to 4.
Computer
An acquisition unit for acquiring a measurement value of power consumption in a consumer from a measurement device;
A record storage unit that stores a record of the actual value of power used by consumers in a record period included in the past predetermined range starting from the present;
A target setting unit that sets a reduction target with respect to a reference value as an absolute target value for the amount of power used by consumers in a target period;
A replacement unit that replaces the absolute target value with a relative target value that is a reduction target for the actual value in the actual period;
A program that functions as an energy management device comprising: a presentation unit that presents the absolute target value and the relative target value.