JP5569503B2 - Power consumption estimation device and power consumption estimation method - Google Patents

Description

  The present invention relates to a technique for individually measuring energy consumption of lighting equipment and air conditioning equipment in commercial facilities such as buildings and stations.

From the viewpoint of CO2 reduction, there is an increasing demand for monitoring the amount of energy consumed by lighting equipment and air conditioning equipment every moment in commercial facilities such as buildings and stations. In some commercial facilities, only a measuring device for measuring the total energy consumption of lighting and air conditioning is installed, and the individual energy consumption of lighting and air conditioning cannot be directly measured.

  The apparatus disclosed in Patent Literature 1 includes a first database that stores an individual consumption pattern indicating a temporal change in energy consumption for each of a plurality of devices, and a temporal change in energy consumption by the plurality of devices as a whole. Measuring means for measuring total consumption time series data and selecting at least one of the individual consumption patterns for each device so that the sum is most similar to the total consumption time series data Allocation for estimating individual consumption time-series data indicating temporal changes in energy consumption actually consumed by the device based on a pattern selection unit, the individual consumption pattern selected for each device, and the overall consumption time-series data And a calculation unit. Thereby, the energy consumption actually consumed by each device can be estimated appropriately.

JP2011-176984

  In the technique disclosed in Patent Literature 1, it is necessary to extract an individual consumption pattern indicating a temporal change in the amount of energy consumption for each device to be individually measured and store it in the first database. However, when many devices such as commercial facilities are used, it is not easy to measure the consumption pattern of each device.

  The present invention has been made in order to solve the above-described conventional problems, and can analyze the characteristics of temporal change in the total load energy consumption of electrical equipment and can estimate the energy consumption of each equipment with high accuracy. It is an object of the present invention to provide an energy usage estimation device and an energy usage estimation method.

  In order to achieve the above object, the energy usage estimation device according to the present invention calculates the total load consumption energy based on the total load current and voltage measured at a predetermined location on the service area, and calculates the absolute value of the total load consumption energy. Using the time series data of the average value of the values or the rate of change and the current time, estimate the operating status of the air conditioning equipment and lighting equipment connected to the lead-in line, and estimate the breakdown of energy consumption for each equipment An estimation means is provided.

  According to the present invention, it is possible to accurately estimate the energy consumption of each facility using an estimation process that does not require prior learning.

It is a block diagram which shows the structure of the energy usage-amount estimation apparatus which concerns on Embodiment 1 of this invention. It is a figure for demonstrating the installation aspect of the energy usage-amount estimation apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the measurement part of the energy usage-amount estimation apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the estimation part of the energy usage-amount estimation apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the memory content of the apparatus information memory of the energy usage-amount estimation apparatus which concerns on Embodiment 1 of this invention. It is a flowchart figure which shows the estimation procedure of the energy consumption of the energy usage-amount estimation apparatus which concerns on Embodiment 1 of this invention. It is a flowchart figure which shows the estimation procedure of the standby electric power of the energy usage-amount estimation apparatus which concerns on Embodiment 1 of this invention. It is a flowchart figure which shows the calculation procedure of the feature-value which shows that the lighting installation of the energy usage-amount estimation apparatus which concerns on Embodiment 1 of this invention is operate | moving. It is a flowchart figure which shows the calculation procedure of the feature-value which shows that the air-conditioning equipment of the energy usage-amount estimation apparatus which concerns on Embodiment 1 of this invention is operate | moving. It is a figure (the 1) which shows an actual example of the power consumption of the whole building using the energy usage-amount estimation apparatus which concerns on Embodiment 1 of this invention. It is FIG. (2) which shows an actual example of the power consumption of the whole building using the energy usage-amount estimation apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the estimation result of the energy consumption of an air-conditioning installation and the energy consumption of a lighting installation by the energy usage-amount estimation apparatus which concerns on Embodiment 1 of this invention.

  Hereinafter, an energy usage estimation apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of an energy usage estimation device 1 according to the present embodiment. The energy usage estimation device 1 includes a measuring unit 10, an instrument transformer 20, and an instrument current transformer 30. As shown in FIG. 2, the energy usage estimation apparatus 1 is installed in the vicinity of a distribution board 2 of a power consumer such as a building or a commercial facility, and is a total of lighting equipment 40 and air conditioning equipment 50 used in the consumer. Measure power. Since the air conditioning equipment 50 and the lighting equipment 40 do not use energy other than electric power, the total power is equivalent to the total energy consumed by the air conditioning equipment 50 and the lighting equipment 40.

  The distribution board 2 is connected to a power system such as an electric power company through a lead-in wire 4. The distribution board 2 is connected to a power supply line 6 for supplying power to the lighting equipment 40 and the air conditioning equipment 50.

  As shown in FIG. 2, the instrument transformer 20 includes an A-phase instrument transformer 201a, a B-phase instrument transformer 201b, and a C-phase instrument transformer 201c. The current transformer 30 includes an A-phase current transformer 301a, a B-phase current transformer 301b, and a C-phase current transformer 301c.

  The instrument transformer 201a has a primary side connected between the A phase 4a and the B phase 4b, and outputs a voltage VA similar to the voltage between the A phase 4a and the B phase 4b from the secondary side. The secondary side of the instrument transformer 201a is connected to the measurement unit 10 via a connection line 202a such as a coaxial cable. The instrument transformer 201b has a primary side connected between the B phase 4b and the C phase 4c, and outputs a voltage VB similar to the voltage between the B phase 4b and the C phase 4c from the secondary side. The secondary side of the instrument transformer 201b is connected to the measurement unit 10 via a connection line 202b such as a coaxial cable. The instrument transformer 201c has a primary side connected between the C phase 4c and the A phase 4a, and outputs a voltage VC similar to the voltage between the C phase 4c and the A phase 4a from the secondary side. The secondary side of the instrument transformer 201c is connected to the measurement unit 10 via a connection line 202c such as a coaxial cable.

  The instrument current transformer 301a measures the current flowing through the A phase 4a on the primary side and outputs a current IA similar to the A phase current from the secondary side. The secondary side of the instrument current transformer 301a is connected to the measurement unit 10 via a connection line 302a such as a coaxial cable. The instrument current transformer 301b measures the current flowing in the B phase 4b on the primary side and outputs a current IB similar to the B phase current from the secondary side. The secondary side of the instrument current transformer 301b is connected to the measurement unit 10 via a connection line 302b such as a coaxial cable. The instrument current transformer 301c measures the current flowing through the C phase 4c on the primary side and outputs a current IC similar to the C phase current from the secondary side. The secondary side of the instrument current transformer 301c is connected to the measurement unit 10 via a connection line 302c such as a coaxial cable. In the present embodiment, an instrument current transformer having a through-type or clamp-type structure is adopted as the instrument current transformers 301a, 301b, 301c.

  As shown in FIG. 3, the measurement unit 10 includes a data extraction unit 11, an estimation unit 12, and a communication unit 13. The communication unit 13 communicates with another system (not shown), and measures the total load energy consumption of the measured lighting equipment 40 and the air conditioning equipment 50, the estimated energy consumption of the lighting equipment 40, and the estimated energy consumption of the air conditioning equipment 50. Send to. The data extraction unit 11 extracts data for one period of the commercial frequency of the total load current based on the voltage and current output from the instrument transformer 20 and the instrument current transformer 30, and calculates the power for each period. measure. Furthermore, this is integrated for 1 minute (120 periods in the case of commercial frequency 50 Hz), and the average value for 1 minute is calculated. The calculated average value is recorded on a memory (not shown). In the present embodiment, the measurement unit is configured by an arithmetic device such as a CPU, a storage device such as a memory, and a program code that defines an operation.

  The estimation unit 12 estimates the energy consumption of each of the air conditioning equipment 50 and the lighting equipment 40 from the power consumption measured by the data extraction unit 11. More specifically, the estimation unit 12, as shown in FIG. 4, includes a clock unit 121 that manages the current time, a lighting estimation unit 122 that estimates the operating state of the lighting facility 40, and an air conditioner that estimates the operating state of the air conditioning facility 50. Device information memory for storing the known operating state of the lighting equipment 40 and the air conditioning equipment 50 for each time zone, estimating the individual energy consumption from the operating state of the estimating section 123, the lighting equipment 40, and the air conditioning equipment 50 125. In the device information memory 125, the equipment name, the start time, the end time, and the equipment state at the start time to the end time are recorded in a table format.

  The clock unit 121 measures the current time and passes it to the illumination estimation unit 122 and the air conditioning estimation unit 123. The current time is the year, month, and day of the measurement date and the hour, minute, and second of the measured time.

  The illumination estimation unit 122 refers to the operation state of the illumination facility 40 recorded in the device information memory 125 using the current time received from the clock unit 121 as a key. At this time, if the operation state of the device referenced from the device information memory 125 is ON or OFF, the fact is passed to the energy consumption estimation unit 124. When the operation state of the device referred to from the device information memory 125 is “undecided”, the operation state of the lighting equipment 40 is estimated to estimate whether the operation state of the lighting equipment 40 is ON or OFF. The result is passed to the energy consumption estimation unit 124.

  The illumination estimation unit 122 refers to the current operation state of the illumination facility 40 from the device information memory 125 according to the following procedure. First, the current time is acquired from the clock unit 121, and a row in which the device type of the device information memory 125 is “lighting” is extracted. This is group A. Next, a row in which the start time column is earlier than the current time is extracted from group A. This is group B. Next, a row whose end time column is later than the current time is extracted from group B. With the above operation, a row indicating the current state of the lighting equipment 40 can be extracted from the finally remaining group.

Here, the operation state of the lighting equipment 40 being “ON” means that the lighting equipment 40 emits light using electric energy. Moreover, that the operation state of the lighting equipment 40 is OFF is a state where the lighting equipment 40 does not emit light.

The air conditioning estimation unit 123 refers to the operation state of the air conditioning equipment 50 recorded in the device information memory 125 using the current time received from the clock unit 121 as a key. At this time, when the operation state of the air conditioning equipment 50 referred to from the device information memory 125 is ON or OFF, the fact is passed to the energy consumption estimation unit 124. When the operation state of the device referred to from the device information memory 125 is “undecided”, the operation state of the air conditioner 50 is estimated to estimate whether the operation state of the air conditioner 50 is ON or OFF. The result is passed to the energy consumption estimation unit 124.

Moreover, the air-conditioning estimation unit 123 refers to the current operation state of the air-conditioning equipment 50 from the device information memory 125 according to the following procedure. First, the current time is acquired from the clock unit 121, and the row in which the device column of the device information memory 125 is “air conditioning” is extracted. This is group C. Next, from the group C, a row whose start time column is earlier than the current time is extracted. This is group D. Next, from the group D, a row whose end time column is later than the current time is extracted. With the above operation, a row indicating the current state of the air conditioning equipment 50 can be extracted.

Here, the operation state of the air conditioner 50 is ON, which means that the air conditioner 50 uses the electric energy to perform operations such as cooling, heating, blowing, drying, and ventilation to control indoor air. It is a state. Moreover, the operating state of the air conditioning equipment 50 is a state in which the air conditioning equipment 50 does not perform operations such as cooling, heating, blowing, and drying, and is not controlling indoor air.

The consumed energy estimation unit 124 estimates the consumed energy of each of the air conditioning equipment 50 and the lighting equipment 40. In the present embodiment, the energy consumption is equivalent to the power consumption of each facility as described above. The energy consumption estimation unit 124 receives the result that the operation state of the lighting facility 40 is ON or OFF from the illumination estimation unit 122 and receives the result that the operation state of the air conditioning facility 50 is ON or OFF from the air conditioning estimation unit 123. Each energy consumption is estimated from these information. A specific calculation method for estimation will be described later. Each estimated energy consumption that is an estimation result is stored in a memory (not shown).

Further, the energy consumption estimation unit 124 updates the standby power information once a day. A specific procedure of the update work will be described later. Here, the standby power is the total power measured when both the air conditioning equipment 50 and the lighting equipment 40 are OFF. The air conditioning equipment 50 and the lighting equipment 40 consume a minute amount of power even when the operation state is OFF. These are used, for example, for microcomputer control and remote control operation. The calculated standby power information is recorded in a memory in the energy consumption estimation unit 124 (not shown). Since a certain amount of standby power is consumed throughout the day, these cannot be estimated separately for the air conditioning equipment 50 and the lighting equipment 40. For this reason, only standby power is managed separately.

In the device information memory 125, for each of the air conditioning equipment 50 and the lighting equipment 40, the operation state from the start time to the end time is recorded in advance in a tabular format. In the example of FIG. 5, the operation state of the air conditioning equipment 50 from 0:00 to 4:00 is OFF, the operation state of the air conditioning equipment 50 from 4:00 to 9:00 is undecided, and the operation of the air conditioning equipment 50 from 9:00 to 17:00 The state is ON, the operating state of the air conditioning equipment 50 from 17:00 to 24:00 is undecided, the operating state of the lighting equipment 40 from 0 to 4 is OFF, and the operating state of the lighting equipment 40 from 4 to 6 is It is recorded that the operating state of the lighting equipment 40 from 6 o'clock to 23:00 is ON and the operating state of the lighting equipment 40 from 23:00 to 0 o'clock is undecided. Here, the operating state is undetermined indicates that the operating state of the apparatus is either ON or OFF, but cannot be determined only from the time. For example, the air conditioning equipment 50 and the lighting equipment 40 have slightly different start times or end times for each day. For this reason, the time period during which the air conditioner or lighting operation state is switched from ON to OFF or from OFF to ON is stored in the device information memory 125 as undetermined, and is either ON or OFF according to the estimation method described later. Estimate.

By having such a device information memory 125, it is possible to improve the estimation accuracy of the illumination operation state and the air conditioning operation state in the illumination estimation unit 122 and the air conditioning estimation unit 123. For example, in commercial facilities and the like, business hours are strictly determined. For example, when business hours are from 7:00 to 22:00, the lighting operation state is surely OFF from 0:00 to 4:00. In addition, during the business hours from 7 o'clock to 22 o'clock, the lighting operation state is surely ON. Information resulting from such facility operation rules is recorded in the device information memory 125. By referring to the stored operating state of the lighting equipment 40 and the air conditioning equipment 50 for each time using the current time as a key, it is possible to eliminate an estimation error with respect to the time when the operating state is fixed.

  Next, the procedure in which the estimation unit 12 estimates the energy consumption of each of the lighting equipment 40 and the air conditioning equipment 50 will be described in detail with reference to FIG. First, the current date and time are acquired from the clock unit 121 (step S101).

  Next, the illumination estimation part 122 estimates the operation state of the lighting installation 40 (step S102). Specifically, first, the current operation state is referred from the device information memory 125 based on the current time passed from the clock unit 121. The reference method is as described above. When the referred result is “ON” or “OFF”, the fact is passed to the energy consumption estimation unit 124. When the referred result is “undecided”, the operation state is estimated according to the procedure described below. First, the transition of power consumption per minute for the past 10 minutes from the current time is acquired from the data extraction unit 11. Next, a feature amount indicating the operation state of the lighting, which will be described later, is calculated. When this value is 0 or more, the operation state is estimated as “ON”, and when it is less than 0, the operation state is estimated as “OFF”. To do. The estimation result is passed to the energy consumption estimation unit 124.

  Next, the air conditioning estimation unit 123 estimates the operating state of the air conditioning equipment 50 (step S103). First, the current operating state is referred from the device information memory 125 based on the current time passed from the clock unit 121. This reference method is as described above. When the referred result is “ON” or “OFF”, the fact is passed to the energy consumption estimation unit 124. When the referred result is “undecided”, the operation state is estimated according to the procedure described below. First, the transition of power consumption per minute for the past 10 minutes from the current time is acquired from the data extraction unit 11. Next, a feature value indicating an air conditioner operating state, which will be described later, is calculated. When this value is 0 or more, the operating state is estimated as “ON”, and when it is less than 0, the operating state is estimated as “OFF”. To do. The estimation result is passed to the energy consumption estimation unit 124.

Finally, the energy consumption estimation unit 124 estimates the individual energy consumption of the air conditioning equipment 50 and the lighting equipment 40 (step S104). The energy consumption estimation unit 124 receives the result that the operation state of the lighting equipment 40 is ON or OFF from the illumination estimation unit 122 and receives the result that the operation state of the air conditioning facility 50 is ON or OFF from the air conditioning estimation unit 123. ing. When the lighting equipment 40 is ON and the air conditioning equipment 50 is OFF, the power consumption of the lighting equipment 40 is obtained by subtracting the standby power from the current power consumption measured by the data extraction unit 11, and the consumption of the air conditioning equipment 50 The power is 0. When the lighting equipment 40 is OFF and the air conditioning equipment 50 is ON, the power obtained by subtracting the standby power from the current power consumption measured by the data extraction unit 11 is used as the power consumption of the air conditioning equipment 50 and the consumption of the lighting equipment 50 The power is 0. When the lighting equipment 40 is OFF and the air conditioning equipment 50 is also OFF, the power consumption of the air conditioning equipment 50 is 0, and the power consumption of the lighting equipment 40 is 0. When the lighting equipment 40 is ON and the air conditioning equipment 50 is also ON, the power of the lighting equipment 40 is used as the power consumption of the recent lighting equipment 40, and the power consumption of the air conditioning equipment 50 is estimated first from the current power consumption. It is set as the power obtained by subtracting the power consumption of the lighting equipment 40 and standby power. Here, the recent power consumption of the lighting equipment 40 is the power consumption of the lighting equipment 40 calculated in a state where the lighting equipment 40 has recently been turned on and the air conditioning equipment 50 has been turned off. These estimation results are all stored in a memory (not shown).

A method for estimating power consumption when the air conditioning facility 50 is ON and the lighting facility 40 is also ON will be described in detail using an example. For example, it is assumed that the first estimation is performed at 7 am and the second estimation is performed at 7:10 am. Assume that the estimation result in the first estimation is that the lighting equipment 40 is ON, the air conditioning equipment 50 is OFF, the estimated power of the lighting equipment 40 is 1 KW, and the estimated power of the air conditioning equipment 50 is 0 KW. Next, it is assumed that the estimation result in the second estimation is that the lighting equipment 40 is ON, the air conditioning equipment 50 is ON, the total load power is 3 KW, and the standby power is 1 KW. In this case, the estimation result of the power consumption of the lighting facility 40 remains 1 KW that is the estimation result in the first estimation performed at 7:00 am. This is because the first estimation performed at 7:00 am is the latest estimation result from the second estimation performed at 7:10 am. Then, the estimation result of the air conditioning equipment 50 is 1 KW obtained by subtracting the standby power 1 KW and the estimated power 1 KW of the lighting equipment 40 from the total load power 3 KW.

The reason for the method of estimating power consumption when the air conditioning equipment 50 is ON and the lighting equipment 40 is also ON will be described in detail. The lighting equipment 40 has a characteristic that the operation state is turned on before the air conditioning equipment 50 in the daily cycle of the commercial facility. This is because, in order to use a commercial facility, it is necessary to first turn on the lighting equipment 40. The power consumption of the lighting equipment 40 immediately reaches the maximum power, and thereafter, the power hardly changes until the business hours end. For this reason, the state transition of the operation state of the air conditioning equipment 50 and the lighting equipment 40 in the cycle of one day is (1) the lighting equipment 40 OFF and the air conditioning equipment 50 OFF (2) the lighting equipment 40 ON and the air conditioning equipment 50 OFF (3) the lighting equipment 40 ON and Transition to the order of air-conditioning equipment 50ON. Therefore, the state of lighting equipment 40ON and air conditioning equipment 50OFF appears earlier than the state of lighting equipment 40ON and air conditioning equipment 50ON. For this reason, the power consumption of the lighting equipment 40 can be correctly estimated by the estimation method described above.

Next, a procedure for updating standby power information in the energy consumption estimation unit 124 will be described in detail with reference to FIG. The energy consumption estimation unit 124 updates standby power once a day. For example, a timer is set in advance so that it is automatically executed at 0:00 or the like.

First, the power consumption of the lighting equipment 40 for one day estimated on the previous day is referred to in order of time, and the period during which the power consumption is 0 is obtained. The obtained period and the power consumption per minute during that period are temporarily stored in a memory (not shown). (Step S101).

Next, the power consumption of the air conditioning equipment 50 per minute estimated for the previous day is referred to in order of time, and the period during which the power consumption is 0 is obtained. The obtained period and the power consumption per minute during that period are temporarily stored in a memory (not shown). (Step S102).

Of the periods in which the estimated power consumption of each facility calculated in step S101 and step S102 is 0, the total load power and the period average values of the periods in which both the estimated power consumption of both facilities are 0 are calculated ( Step S103).

As described above, the standby power of the air conditioner and the lighting device can be automatically calculated.

Next, the means by which the illumination estimation unit 122 calculates the feature amount indicating that the illumination facility 40 is operating will be described in detail with reference to FIG.

First, the illumination estimation unit 122 acquires power consumption data for the past 10 minutes from the data extraction unit (step S301). Here, the measurement interval of each power consumption data is 1 minute. Accordingly, 10 power consumption values D1, D2,..., D10 are received.

Next, the illumination estimation unit 122 calculates the total value of the acquired data (D1, D2,..., D10), divides by the number of acquired data, and calculates the average value S of the data (step 302).

Finally, the illumination estimation unit 122 subtracts the threshold value X1 from the average value S of the data, and uses this as a feature amount (step 303). The threshold value X1 is preliminarily mounted in the apparatus program.

As described above, the feature amount indicating the operating state of the lighting equipment 40 can be calculated. The power consumption of the lighting equipment 40 varies very little. After lighting, it always consumes a certain amount of power. Further, as described above, in a commercial facility, when the operating state of the air conditioning equipment 50 is ON, the operating state of the lighting equipment 40 is always ON, and therefore the operating state of the lighting equipment 40 is correctly estimated by the above-described procedure. be able to.

In step S301, the power consumption to be used is data for the past 10 minutes. However, if this is an interval that is a constant multiple of the power measurement interval, such as 3 minutes, 5 minutes, 15 minutes, 20 minutes, etc. Not limited to.

In addition, the measurement interval is set to be 1 minute, which is a time that is short enough for a person who operates the air conditioning equipment 50 and the lighting equipment 40 to operate these two. Not limited to.

Next, the means by which the air-conditioning estimation unit 123 calculates a feature amount indicating that the air-conditioning equipment 50 is operating will be described in detail with reference to FIG.

First, the air conditioning estimation unit 123 acquires power consumption data for the past 10 minutes from the data extraction unit 11 (step S401). Here, the interval of power consumption data is one minute. Accordingly, 10 power consumption values D1, D2,..., D10 are received.

Next, the air conditioning estimation unit 123 calculates the speed (ΔD2,... ΔD10) of the acquired data (step 402). The specific calculation formula is as follows.

ｍ＝２〜１０

m = 2 to 10

Next, the air conditioning estimation unit 123 calculates the absolute value of speed (| ΔD2 |, | ΔD10 |) (step 403).

Next, the air-conditioning estimation unit 123 calculates the average value T of the absolute values calculated in step S403 (step 404).

Finally, the air-conditioning estimation unit 123 subtracts the threshold value X2 from the calculated average value T and sets it as a feature amount (step 405). The threshold value X2 is preliminarily mounted in the apparatus program.

With the above procedure, the operating state of the air conditioning equipment 50 can be correctly estimated. When the air conditioner 50 is in operation, the fluctuation of the total load power consumption, that is, the value of ΔDm described above becomes large. Therefore, the operation state of the air conditioner 50 is accurately estimated by using the feature amount calculated according to the procedure described above. can do.

Next, the procedure in which the present invention estimates the electric power of each of the lighting equipment and the air conditioning equipment will be specifically described using an example in an actual building.

FIG. 10 shows the power consumption time transition 60 of the total load of the day measured using the energy usage amount estimation apparatus 1 according to the present invention on September 1, 2011. The power consumption time transition 60 is recorded in the data extraction unit 11, and illustrates the total load power consumption for one day measured every minute as a line graph.

FIG. 11 is an enlarged view of the power consumption time transition 60 shown in FIG. 10 from 6 am to 9 am. Further, the calculation results of the feature values (61a, 62a) indicating the operation state of the lighting equipment 40 and the feature values (61b, 62b) indicating the operation state of the air conditioning equipment 50 are also illustrated. At the 6 am stage, both the feature quantity indicating that the lighting equipment 40 is operating and the feature quantity indicating that the air conditioning equipment 50 is operating are both less than 0. The power consumption of the facility 40 was both estimated to be zero. Next, at 6:31 am (dotted line 610 in the figure), the feature value indicating that the lighting equipment 40 is operating exceeded 0, and thereafter, the feature value became 0 or more until 23:35. Therefore, during the period from 6:31 am to 7:37 am (61, 61a, 61b in the figure), it is estimated that the operating state of the lighting equipment 40 is ON and the operating state of the air conditioning equipment 50 is OFF. . At 7:37 am (dotted line 620 in the figure), the feature amount indicating that the air conditioning equipment 50 is operating becomes 0 or more, and thereafter, the state of 0 or more continues until 23:22. For this reason, during this period (62, 62a, 62b in the figure), it is estimated that the operating state of the lighting equipment 40 is ON and the operating state of the air conditioning equipment 50 is ON.

12 is a graph showing the estimated power consumption of the lighting equipment 40 and the air conditioning equipment 50 estimated by the energy consumption estimation unit 124 of the energy usage estimation device 1 according to the present invention with respect to the total load current consumption described in FIG. It is illustrated as a table. The estimated power consumption 63 of the air conditioner 50 (white portions in the figure) and the estimated power consumption 64 of the lighting equipment 40 (shaded portions in the figure) were estimated as shown in the figure. Table 70 shows the results of comparison between the estimated results of actually measuring the power consumption of the air conditioning equipment 50 and the power consumption of the lighting equipment 40 using another device. The estimation error is about 1% for the air-conditioning equipment 50 and about 2% for the lighting equipment 40, and it can be seen that the estimation accuracy of the energy usage estimation device 1 which is an embodiment of the present invention is sufficiently high.

  As described above, according to the energy usage amount estimation device 1 of the present embodiment, the individual power consumption of the lighting equipment 40 and the air conditioning equipment 50 that are actually used in a facility that uses electric power, Measurement can be performed without installing a power consumption measuring instrument for each air conditioning facility 50.

  For example, the estimated power consumption data of the lighting equipment 40 and the air conditioning equipment 50 may be transmitted to another device from the communication unit 13 and displayed on the device to be presented to the user. Moreover, you may make it transmit to the server which service providers, such as an electric power provider, operate via a predetermined | prescribed communication line. In this manner, various information services are provided from the service provider to the power user, and information on the power user side is also collected by the service provider through the network and is effectively used to construct a new service. be able to.

  For example, one of important information for electric utilities is information on the configuration and actual usage of lighting and air conditioning equipment. In particular, in commercial facilities such as buildings, energy saving can be promoted by obtaining a breakdown of the actual usage of electricity. It can be said that the energy usage estimation apparatus 1 of this embodiment is one of the powerful apparatuses which can respond to such a need.

  In the present embodiment, the estimation of the power consumption of each of the lighting equipment and air conditioning equipment in the building has been described. However, the present invention can be applied not only to the building but also to commercial facilities such as factories, station buildings, and movie theaters. In this case, for example, by monitoring and recording the operating state and power consumption of the lighting equipment and air conditioning equipment in the facility, the amount of power consumption of the entire building will be brought about by the air conditioning equipment and lighting equipment at a later date. It can be analyzed whether it was made.

  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.

  The present invention can be suitably used not only in buildings but also in factories and general homes as a device for measuring individual power consumption of lighting equipment and air conditioning equipment.

DESCRIPTION OF SYMBOLS 1 Energy usage estimation apparatus, 2 distribution board, 4 service line, 6 power supply line, 10 measurement part, 11 data extraction part, 12 estimation part, 13 communication part, 20 instrument transformer, 30 instrument current transformer, 40 lighting equipment, 50 air conditioning equipment, 121 clock section, 122 lighting estimation section, 123 air conditioning estimation section, 124 energy consumption estimation section, 125 equipment information memory, 201a instrument transformer (for phase A), 201b instrument transformer ( B phase), 201c Instrument transformer (for C phase), 301a Instrument current transformer (for A phase), 301b Instrument current transformer (for B phase), 301c Instrument current transformer (for C phase) ), 202a, 202b, 202c, 302a, 302b, 302c connecting lines.

Claims (2)

A total power consumption calculating means for calculating a total power consumption value based on a total load current and voltage measured at a predetermined location in a service area lead-in line ;
A change in the total power consumption value measured at a predetermined time interval using a value obtained by subtracting a predetermined illumination threshold from an average value for a predetermined time as the total power consumption value measured at a predetermined time interval. A value obtained by subtracting a predetermined air conditioning threshold from an average value for a predetermined time as an absolute value of speed is an air conditioning feature value, and when the illumination feature value exceeds 0, the lighting equipment is estimated to be in an operating state, An operating state estimating means for estimating that the air conditioning equipment is in an operating state when the air conditioning feature amount exceeds 0;
Breakdown estimating means for estimating the breakdown of the total power consumption of the lighting equipment and the air conditioning equipment from the time of the operating status of the lighting equipment and the time of the operating status of the air conditioning equipment estimated by the operating state estimating means;
A power consumption estimation apparatus comprising:
Measuring the total load current and voltage measured at a predetermined location in the service area, and calculating the total power consumption from the measured total load current and voltage;
Obtaining the calculated total power consumption for a predetermined time at predetermined intervals;
A value obtained by subtracting a predetermined illumination threshold value from the average value of the acquired total power consumption value as an illumination feature amount;
A step of setting a value obtained by subtracting a threshold for air conditioning from an average value of absolute values of the change speed of the acquired total power consumption value as an air conditioning feature amount;
A step of estimating that the lighting equipment is in an operating state when the lighting feature amount exceeds 0;
A step of estimating that the air conditioning equipment is in an operating state when the air conditioning feature amount exceeds 0;
Estimating the breakdown of the power consumption of the lighting equipment and the air conditioning equipment of the total power consumption from the time when the lighting equipment is estimated to be operating and the time when the air conditioning equipment is estimated to be operating;
A method for estimating power consumption .

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