JP2016024047A - A power measuring device and a power measurement system using the same - Google Patents

Abstract

A power measuring apparatus and a power measuring system using the power measuring apparatus are provided that can measure the power or the amount of power of a plurality of independent electric circuits with a single unit. A power measuring apparatus includes a measuring unit and an output unit. The measurement unit 11 individually measures at least one of the electric power and the electric energy passing through each of the plurality of independent electric circuits as a measurement value for each of the plurality of electric circuits. The output part 12 outputs the said measured value about each of several electric circuit separately. Here, the measurement part 11 is comprised so that the process which calculates | requires the said measured value may be performed by the common process circuit 111 about several electric circuit. [Selection] Figure 1

Description

  The present invention generally relates to a power measurement device and a power measurement system using the same, and more particularly to a power measurement device capable of individually measuring the power of a plurality of independent electrical paths and a power measurement system using the same.

  Conventionally, a system including a power measurement device (power measurement unit) that measures the amount of power supplied from the power system and a display device (display unit) that displays the amount of power measured by the power measurement unit has been proposed. (For example, refer to Patent Document 1).

  The power measurement device described in Patent Literature 1 includes a current detection unit that detects a current flowing through an electric circuit in a distribution board, a voltage detection unit that detects a voltage, and a calculation unit that calculates power. In this power measuring apparatus, the current detection means is installed in the distribution board, and the housing for storing the voltage means and the calculation means is installed outside the distribution board. This power measuring device can monitor the power consumed in a house by measuring the amount of power supplied from the power system to the main breaker of the distribution board.

JP 2011-2364 A

  By the way, in recent years, for example, a power distribution system using an electric circuit connected to an electric power system without passing through a distribution board has been provided. As an example of this type of power distribution system, there is a power generation system that employs a total purchase system in which all the power generated by the power generation device flows back to the power company. In this power generation system, in addition to the power supply circuit connected to the load from the power system through the distribution board, there is an electric circuit (dedicated wiring) for purchasing the entire quantity that connects to the power system without passing through the distribution panel from the power generator. Wired. These electric circuits (electric power supply circuit, electric power purchase circuit) are independent of each other.

  Since the power measuring device described in Patent Document 1 can only measure the amount of electric power in the electric circuit that passes through the distribution board, in this type of distribution system, the electric energy in the electric circuit that is connected to the power system without passing through the distribution board is measured. Requires a separate power measuring device. Therefore, in order to measure the electric energy of a plurality of electric circuits independent from each other in this way, a plurality of power measuring devices are required.

  This invention is made | formed in view of the said reason, and it aims at providing the electric power measurement apparatus which can measure the electric power or electric energy of several electric circuit mutually independent by one unit, and an electric power measurement system using the same.

  The power measuring device of the present invention includes a measuring unit that individually measures each of the plurality of electric circuits as a measurement value of at least one of the electric power and the electric energy passing through each of the plurality of electric circuits independent of each other; An output unit that individually outputs the measurement values for each of the electric circuits, and the measurement unit is configured to perform processing for obtaining the measurement values in a common processing circuit for the plurality of electric circuits. Features.

  A power measurement system according to the present invention includes the power measurement device described above and a display device that acquires the measurement value from the output unit and displays the measurement value.

  According to the present invention, there is an advantage that the power or the amount of power of a plurality of electric circuits independent from each other can be measured by one unit.

1 is a schematic block diagram of a power measurement system according to a first embodiment. 1 is a schematic block diagram of a power distribution system in which a power measurement device according to Embodiment 1 is used. FIG. 4 is an explanatory diagram illustrating a display screen of the display device according to the first embodiment. FIG. 10 is an explanatory diagram illustrating another display screen of the display device according to the first embodiment. It is a schematic block diagram of the electric power measurement apparatus which concerns on Embodiment 3.

(Embodiment 1)
As shown in FIG. 1, the power measuring apparatus 1 according to the present embodiment includes a measuring unit 11 and an output unit 12. The measuring unit 11 individually measures at least one of the electric power and the electric energy passing through each of the plurality of electric circuits 21 and 22 (see FIG. 2) independent from each other as a measurement value for each of the plurality of electric circuits 21 and 22. . The output unit 12 individually outputs the measurement values for each of the plurality of electric paths 21 and 22.

  Here, the measurement part 11 is comprised so that the process which calculates | requires the said measured value may be performed by the common process circuit 111 about the some electric circuit 21 and 22. FIG.

  According to this configuration, the power measuring apparatus 1 performs a process of obtaining a measurement value (at least one of power and power amount) on the common processing circuit 111 of the measurement unit 11 for a plurality of independent electrical paths 21 and 22. Can be realized. Therefore, for example, even in a power distribution system having a plurality of electric circuits (electric power supply circuit and electric power supply circuit for electric power supply) that are independent from each other, such as a power generation system that employs the total quantity purchase method, The measured value can be measured with one unit. In short, this power measuring device 1 has an advantage that it can measure the power or the amount of power of a plurality of independent electric circuits with one unit.

  Hereinafter, the power measurement device 1 according to the present embodiment and the power measurement system 10 using the power measurement device 1 will be described in detail. However, the configuration described below is only an example of the present invention, and the present invention is not limited to the following embodiment, and the technical idea according to the present invention is not deviated from this embodiment. Various changes can be made in accordance with the design or the like as long as they are not.

  Here, a case where the power measuring device 1 is used in a full-volume purchase type power generation system will be described as an example. In addition, although this embodiment demonstrates to the case where the power measuring device 1 is used for the electric power consumer (facility) which consists of a detached house as an example, not only this example but the power measuring device 1 is an apartment house, for example. It may be used for customers such as each dwelling unit, office, store, factory.

<Configuration of power generation system>
First, the configuration of a power purchase system of a total purchase method in which the power measuring device 1 according to the present embodiment is used will be briefly described with reference to FIG. In the present embodiment, the case where the power system 3 is a single-phase three-wire type AC will be described as an example.

  In this power generation system, as shown in FIG. 2, separately from the power supply circuit 21 connected to the loads 5, 5... From the power system 3 through the distribution board 4, the power generation apparatus 6 does not pass through the distribution board 4. An electric path 22 for purchasing all the quantities connected to the electric power system 3 is wired on the premises of the customer 100. In other words, in this power generation system, a power purchase circuit 22 for sending the generated power generated by the power generation device 6 to the power system 3 and a power supply circuit for sending the power supplied from the power system 3 to the loads 5, 5. A plurality of independent electrical circuits including 21 are used. The electric power supply circuit 21 is an electric circuit electrically connected to the distribution board 4 (hereinafter referred to as a “first electric circuit”), and the entire electric power purchase circuit 22 is electrically connected to the distribution board 4. This is a disconnected electric circuit (hereinafter referred to as “second electric circuit”).

  The first electric circuit 21 is provided with a supply meter 211 and a distribution board 4, and a plurality of loads 5, 5... Are electrically connected to the power system 3 via the supply meter 211 and the distribution board 4. Connected.

  The supply meter 211 is a watt-hour meter (power meter) that measures the amount of power passing through the first electric path 21. The supply meter 211 measures an integrated value (amount of power used) of power supplied from the power system 3 to the customer 100. The supply meter 211 is managed by an electric power company or the like that is a power supply company, and the consideration paid by the contractor (the householder of the customer 100) to the supply company according to the measurement value (power consumption) ( Used for calculation of electricity charges. Specifically, the contractor pays the supply company as an electricity bill by multiplying the amount of power used by the unit price of power purchase.

  The distribution board 4 includes a cabinet 41 attached to a wall of a house or the like, and stores a main breaker 42 and a plurality of branch breakers 43, 43. The power system 3 is electrically connected to the primary side of the main breaker 42 via a supply meter 211. A plurality of branch breakers 43, 43... Are electrically connected to the secondary side of the main breaker 42. In other words, the first electric circuit 21 is branched into a plurality of branch circuits by the plurality of branch breakers 43, 43..., And the load 5 is electrically connected to each of the plurality of branch circuits. Further, a measurement unit 44 and a communication unit 45 described later are housed in the cabinet 41 of the distribution board 4.

  The load 5 connected to each of the plurality of branch breakers 43, 43... Is a device provided in the customer 100 such as a lighting fixture or a hot water supply facility. These loads 5 are connected to the branch breaker 43 via a wiring device such as an outlet (outlet) of a plug connection device (not shown) or a wall switch.

  The second electric circuit 22 is provided with a purchase meter 221 and a current collection box 222, and the power generator 6 is electrically connected to the power system 3 via the purchase meter 221 and the current collection box 222.

  The purchase meter 221 measures an integrated value (amount of electric power sold) of power that flows backward from the customer 100 to the power system 3. This purchase meter 221 is managed by a power supply company (electric power company or the like), and the price paid by the power supply company to the contractor (the householder of the customer 100) according to the measured value (power sales amount). Used to calculate the amount. Specifically, the supply company pays the contractor the amount of power sold by multiplying the amount of power sold by the unit price of power sale.

  The current collection box 222 includes a circuit breaker (not shown) for wiring. For example, when an abnormal current flows through the second electric circuit 22, the second electric circuit 22 is interrupted to generate power from the power system 3. The device 6 is configured to be electrically disconnected. The current collection box 222 is electrically connected to the power system 3 via the purchase meter 221. The current collection box 222 is configured such that a plurality of power generation devices 6 can be connected, and power (AC power) output from the plurality of power generation devices 6 can be collected and output to the power system 3.

  In the present embodiment, the power generation device 6 includes a solar cell 61 and a power conditioner 62 as an example. The power generator 6 is configured to convert DC power generated by the solar battery 61 into AC power by a power conditioner 62 and output the AC power to the power system 3.

  Here, the first electric circuit 21 and the second electric circuit 22 are electrically connected to the same transformer 31. The transformer 31 is electrically connected to the power system 3, steps down the AC voltage from the power system 3, applies it to the first circuit 21, and boosts the AC voltage from the second circuit 22. Applied to the power system 3. The transformer 31 is, for example, a pole transformer, and one transformer 31 is provided for a plurality of consumers.

  With the configuration as described above, the power generation system performs power transmission from the power system 3 to the customer 100 (so-called “power purchase”) and power transmission from the customer 100 to the power system 3 (so-called “power sales”). It is performed by separate electric circuits (the first electric circuit 21 and the second electric circuit 22) that are independent from each other. Therefore, the flow of power passing through the first electric circuit 21 is unidirectional from the power system 3 to the customer 100, and the flow of power passing through the second electric circuit 22 is unidirectional from the customer 100 to the power system 3. It becomes. Therefore, the contractor (the householder of the customer 100) can sell the total amount of power generated by the power generation device 6 and receive the price from the supplier.

  Note that, in such a total purchase method power generation system, unlike the surplus purchase method in which only surplus power obtained by subtracting the used power from the generated power is sold, all the generated power of the power generator 6 is purchased by the supplier. Therefore, the power generation device 6 is installed in the customer 100 as an investment for increasing profits for the contractor (the householder of the customer 100).

<Configuration of controller>
The controller 7 is installed in the customer 100 as shown in FIG. The controller 7 is provided outside the cabinet 41 of the distribution board 4 and has a communication function with the communication unit 45. In the present embodiment, as an example, the controller 7 performs wireless communication with the communication unit 45 using a radio wave such as a specific low power wireless in a 920 MHz band, for example. However, as a communication method between the controller 7 and the communication unit 45, an appropriate method can be applied regardless of wireless communication or wired communication.

  The controller 7 communicates with at least various devices including the display device 8 and has a function of controlling these devices. The device here is a device compatible with HEMS (Home Energy Management System). The HEMS compatible device includes not only a device as the load 5 that consumes electric power, such as an air conditioner, a lighting fixture, and a hot water supply device, but also a device such as a power generation device 6. In this embodiment, as an example, the controller 7 performs wireless communication with a device (corresponding to HEMS) using radio waves such as a specific low-power radio in the 920 MHz band as a medium. However, as a communication method between the controller 7 and the device, an appropriate method can be applied regardless of wireless communication or wired communication.

  As will be described in detail later, the measurement unit 44 and the communication unit 45 have a function as the measurement unit 11 (see FIG. 1) of the power measurement device 1 (see FIG. 1). Therefore, the controller 7 can receive data corresponding to the measurement value from the communication unit 45 as power information. The controller 7 can visualize the power information by controlling the display device 8. The controller 7 may have a function of controlling a device other than the display device 8 (compatible with HEMS) based on the power information.

<Configuration of power measuring device>
As shown in FIG. 1, the power measuring device 1 includes a function as the measurement unit 11 in the distribution board 4 and a function as the output unit 12 in the controller 7. That is, in this embodiment, the power measuring device 1 is provided separately in the distribution board 4 and the controller 7. In FIG. 1, the measurement unit 44 (see FIG. 2) and the communication unit 45 (see FIG. 2) are collectively shown as the distribution board 4, but the measurement unit 11 communicates with the measurement unit 44. It may be provided separately from the unit 45.

  The measurement unit 11 uses the first electric circuit 21 (see FIG. 2) and the second electric circuit 22 (see FIG. 2) independent from each other as the measurement value as the first value. Each of the electric circuit 21 and the second electric circuit 22 is configured to measure individually.

  The power measuring device 1 further includes a first detector 91 and a second detector 92. The first detector 91 is attached to the first electric circuit 21. The second detector 92 is attached to the second electric circuit 22. The first detector 91 is a sensor for detecting electric power passing through the first electric circuit 21, and here is a current sensor for measuring the value of the current flowing through the first electric circuit 21. The second detector 92 is a sensor for detecting the electric power passing through the second electric circuit 22, and here is a current sensor for measuring the value of the current flowing through the second electric circuit 22.

  In the present embodiment, as an example, the first detector 91 and the second detector 92 are each constituted by a current transformer (current transformer). However, each of the first detector 91 and the second detector 92 is not limited to a current transformer, and may be, for example, a Hall element, a magnetoresistive element, a GMR (Giant Magnetic Resistances) element, a shunt resistor, or the like. .

  The first detector 91 is provided in the distribution board 4, and a part of the first electric circuit 21, for example, the supply meter 211 (see FIG. 2) of the first electric circuit 21 and the main breaker 42 (FIG. 2). It is attached to the part that connects The first detector 91 is electrically connected to the measurement unit 44 (see FIG. 2) in the distribution board 4. As a result, the first detector 91 outputs a first sensor signal corresponding to the current flowing through the first electric circuit 21 to the measurement unit (measurement unit 44) 11.

  The second detector 92 is provided outside the distribution board 4, and is a part of the second electric circuit 22, for example, a part connecting the purchase meter 221 and the current collection box 222 in the second electric circuit 22. It is attached. The second detector 92 is electrically connected to the measurement unit 44 in the distribution board 4 via a cable 93 drawn from the distribution board 4. When the second detector 92 includes a current transformer (current transformer), the cable 93 can be extended to several tens of meters (for example, 30 meters). Accordingly, the second detector 92 outputs a second sensor signal corresponding to the current flowing through the second electric path 22 to the measurement unit (measurement unit 44) 11.

  In the present embodiment, the first detector and the second detector are included in the constituent elements of the power measuring device 1, but the first detector and the second detector are the power measuring device 1. The structure which is not contained in these components but is attached to the power measuring apparatus 1 may be used.

  The measuring unit 11 provided in the distribution board 4 is configured to measure the measured value of the first electric circuit 21 from the output (first sensor signal) of the first detector 91. Furthermore, the measurement unit 11 is configured to measure the measurement value of the second electric path 22 from the output (second sensor signal) of the second detector 92. In the present embodiment, a first terminal (not shown) for connecting the first detector 91 and a second terminal (not shown) for connecting the second detector 92 are measured. The unit 44 is provided individually. The measurement part 11 makes the signal input into a 1st terminal a 1st sensor signal, and makes the signal input into a 2nd terminal a 2nd sensor signal.

  The measuring unit 11 has a function of measuring the voltage value (instantaneous value) applied to the first electric circuit 21 as voltage information, for example, on the secondary side of the main breaker 42. The measurement part 11 is the electric power which passes each of the 1st electric circuit 21 and the 2nd electric circuit 22 based on the electric current value measured by the 1st detector 91 and the 2nd detector 92, and voltage information. The value of (instantaneous power) is obtained as a measured value. In the present embodiment, the measuring unit 11 further adds power obtained by integrating instantaneous power over a predetermined time (for example, 5 minutes, 10 minutes, 1 hour, etc.) for each of the first electric circuit 21 and the second electric circuit 22. The quantity is configured to be obtained as a measured value. That is, the measurement value measured by the measurement unit 11 includes both electric power (instantaneous electric power) and electric energy.

  Here, the measurement unit 11 is configured to perform a process for obtaining a measurement value in the common processing circuit 111 for the first electric circuit 21 and the second electric circuit 22. The processing circuit 111 has a microcomputer (microcomputer) as a main configuration, and is configured to perform appropriate processing such as integration on the output of each of the first detector 91 and the second detector 92. Yes. Further, the measurement unit 11 transmits the measurement value measured in this way to the output unit 12. Note that the transmission of the measurement value from the measurement unit 11 to the output unit 12 is realized by communication between the communication unit 45 and the controller 7.

  When the output unit 12 acquires the measurement values for the first electric circuit 21 and the second electric circuit 22 from the measurement unit 11, the output unit 12 individually outputs the measurement values for each of the first electric circuit 21 and the second electric circuit 22. It is configured as follows. Specifically, the output unit 12 provided in the controller 7 functions to control the display device 8 through communication with the display device 8 and display the measurement value on the display device 8. In other words, the output unit 12 of the power measuring device 1 is configured to individually output the measurement values for each of the first electric circuit 21 and the second electric circuit 22 to the display device 8.

  In the present embodiment, the controller 7 includes the data storage unit 13, and the output unit 12 individually outputs the measurement values for each of the first electric circuit 21 and the second electric circuit 22 to the data storage unit 13. It is configured to output to. The data storage unit 13 individually stores (stores) the measurement values acquired from the output unit 12 for each of the first electric circuit 21 and the second electric circuit 22. Here, the output unit 12 periodically outputs the measurement value to the data storage unit 13, and the data storage unit 13 stores the measurement value in time series.

  The data storage unit 13 is preferably configured to store the first electric circuit 21 and the second electric circuit 22 for a relatively long period (for example, 10 years) at least with respect to the accumulated electric energy. . Although the data storage unit 13 is included in the constituent elements of the power measurement device 1, the data storage unit 13 may be configured to be externally attached to the power measurement device 1 without being included in the constituent elements of the power measurement device 1. . The data storage unit 13 may be a partial storage area of a memory built in the controller 7, or may be an external recording medium such as a memory card.

  The power measurement device 1 uses the measurement value stored in the data storage unit 13 to thereby determine the power amount of the current day, the power amount of the current month, or the power measurement system for each of the first electric circuit 21 and the second electric circuit 22. Cumulative electric energy from the time of introduction of 10 to the present can be obtained.

  1 further includes classification units 14 and 15 and a registration unit 16. The classification units 14 and 15 are in the second embodiment, and the registration unit 16 is in the third embodiment. Since it will be described, the description is omitted here.

<Configuration of power measurement system>
As shown in FIG. 1, the power measurement system 10 according to the present embodiment includes the power measurement device 1 described above and a display device 8 that acquires measurement values from the output unit 12 and displays the measurement values.

  In the present embodiment, the display device 8 is a dedicated monitor installed at an appropriate position of the customer 100, and is configured to be able to communicate with the controller 7. The display device 8 acquires a measurement value from the output unit 12 and displays the measurement value by displaying a screen provided from the controller 7 as a server. The display device 8 only needs to be able to communicate with the controller 7 and have a Web browser function. The display device 8 is not limited to a dedicated monitor, and may be a general-purpose device such as a smartphone, a tablet terminal, a television receiver, or a personal computer (personal computer). It may be an information terminal.

  Further, the display device 8 has a function of an input interface that accepts an operation input from the user by adopting a touch panel display, and is configured to transmit an input signal corresponding to the operation input to the controller 7. . Therefore, the user (household of the customer 100) can give an instruction to the controller 7 by operating the display device 8 as necessary.

  The power measurement system 10 having the above-described configuration is configured to be able to individually display the measurement values for each of the first electric circuit 21 and the second electric circuit 22 measured by the power measurement device 1 on the display device 8. . That is, the display device 8 individually acquires measurement values for each of the first electric circuit 21 and the second electric circuit 22 from the controller (output unit 12) 7 in accordance with an operation input from the user, and displays them individually. can do.

<Setting operation of power measurement system>
The power measurement system 10 according to the present embodiment can be operated in a setting mode in which various settings necessary for operation in the normal mode are performed in addition to a normal mode in which measurement values are actually measured and displayed. A user (household of the customer 100) can switch between the normal mode and the setting mode by operating the display device 8, and first selects the setting mode when the power measurement system 10 is introduced.

  The power measurement system 10 displays a setting screen on the display device 8 in the setting mode. A list of items such as time to be set is displayed on the setting screen, and the user selects an arbitrary item from the list. Here, the power measurement system 10 according to the present embodiment includes the “power purchase mode” among the items displayed on the setting screen. When the item “power purchase mode” is selected, the power measurement system 10 causes the display device 8 to display a screen 81 for setting the power purchase mode as shown in FIG. 3, for example.

  The power purchase mode setting screen 81 has a selection field 811 for selecting either “surplus purchase mode” or “full quantity purchase mode” as the “power purchase mode”. When the customer 100 adopts the full purchase method as in the present embodiment, the user selects the “full purchase mode” in the selection field 811. On the other hand, when the surplus purchase method in which only the surplus power obtained by subtracting the used power from the generated power is adopted in the customer 100 is adopted, the user selects the “surplus purchase mode”.

  When “full purchase mode” is selected, in the normal mode, the power measurement system 10 operates to measure and display the measured values individually for each of the first electric circuit 21 and the second electric circuit 22. . In this case, the measured value of the first electric circuit 21 is a target of power purchase supplied from the power system 3 to the customer 100, and the measured value of the second electric circuit 22 is the reverse power flow from the customer 100 to the power system 3. It becomes the target of the sold power.

  On the other hand, when the “surplus purchase mode” is selected, in the normal mode, the power measurement system 10 operates so as to measure and display the measurement value only for the first electric circuit 21. In other words, in the surplus purchase method, both the power purchase and the power sale are performed by one system of electric circuit (first electric circuit 21) electrically connected to the distribution board 4, and therefore the second electric circuit 22 It does not exist, and the measurement value of the second electric circuit 22 is not necessary.

  Furthermore, the screen 81 for setting the power purchase mode has an input field 812 for inputting a power sale unit price (yen). In this input field 812, the user inputs the power selling unit price in the total quantity purchase method. The power purchase unit price and the power purchase unit price in the surplus purchase method are set on a screen different from the screen 81 for setting the power purchase mode.

  By the way, the electric power measurement system 10 can switch between the “full purchase mode” and the “surplus purchase mode” at an arbitrary timing by switching to the setting mode even after once operating in the normal mode.

  Therefore, when the purchase method of power in the customer 100 is changed from the full purchase method to the surplus purchase method, the user switches the “total purchase mode” to the “surplus purchase mode” to change the power measurement system 10. Can be diverted. On the contrary, when the power purchase method in the customer 100 is changed from the surplus purchase method to the full amount purchase method, the user switches from the “surplus purchase mode” to the “full amount purchase mode”, thereby the power measurement system 10. Can be diverted.

<Normal operation of power measurement system>
In this embodiment, the case where “all purchase mode” is selected in the setting mode described above is exemplified. Therefore, in the normal mode, the power measurement system 10 according to the present embodiment individually measures the measurement values for each of the first electric circuit 21 and the second electric circuit 22 with the power measurement device 1, and displays the display device 8. Individually.

  Specifically, the power measurement system 10 displays a monitor screen 82 for power sale as shown in FIG. The monitoring screen 82 for power sale is a screen that displays the measured value of the second electric circuit 22 that is the target of power sale. The monitoring screen 82 illustrated in FIG. 4 includes a first column 821 representing “current power sale amount”, a second column 822 representing “today power sale amount”, and a third column representing “current month power sale amount”. Column 823 and a fourth column 824 representing “integrated power sale amount”.

  The display device 8 displays the current instantaneous power for the second electric circuit 22 in the first column 821 as “current power sale amount”. The display device 8 sets the amount of electric power (integrated value) on the second electric circuit 22 on the day and the amount of electric power sold on the day obtained by multiplying the electric energy by the electric power selling unit price as “today's electric power sales amount” in the second column 822. To display. The display device 8 has a third column 823 in which the current amount of electricity (integrated value) for the second electrical path 22 and the amount of power sold in the current month multiplied by the unit price of power sale are set as “amount of power sold in this month”. To display. The display device 8 displays the accumulated power amount (integrated value) for the second electric circuit 22 from the time of introduction of the power measurement system 10 to the present time, and the accumulated power sale amount obtained by multiplying the power amount by the power sale unit price. “Electricity” is displayed in the fourth column 824.

  The power sale monitoring screen 82 illustrated in FIG. 4 includes a first switch button 825 for switching to a power purchase monitoring screen (not shown) and a first switch button 825 for switching to a graph display screen (not shown). 2 switching buttons 826. When the first switching button 825 is touched, the power measurement system 10 displays a screen (monitoring screen for power purchase) on the display device 8 that displays the measured value of the first electric circuit 21 to be purchased. Display. In addition, when the second switching button 826 is touched, the power measurement system 10 displays a screen (graph display screen) that displays the measured value of the second electric circuit 22 to be sold in a graph format. 8 is displayed.

  By the way, in the power measurement system 10 of the present embodiment, when the operation input to the display device 8 is not longer than a predetermined time, the power of the display device 8 is turned off and a home button (not shown) of the display device 8 is pressed. The display device 8 is configured to be activated. In the present embodiment, the power measurement system 10 uses the screen (top screen) that is initially displayed on the display device 8 when the display device 8 is activated as the power monitoring screen 82. In the total amount purchase method, all the generated power of the power generation device 6 is purchased by the supplier, and the accumulated power sale amount represents the profit for the user (the householder of the customer 100). Therefore, the user can easily confirm how much revenue is generated from the information displayed on the top screen (monitoring screen 82 for power sale).

<Effect>
According to the power measurement device 1 of the present embodiment described above, the measurement unit 11 performs a process of obtaining a measurement value (at least one of power and power amount) by using a plurality of independent electrical circuits (first electrical circuit 21 and The second electric circuit 22) can be realized by the common processing circuit 111. Therefore, even in a power distribution system having a plurality of independent electric circuits (electric power supply circuit 21 and electric power supply circuit 22), such as a power generation system adopting the total quantity purchase method, the measured values of the plurality of electric circuits are obtained. It can be measured by one power measuring device 1. In short, this power measuring device 1 has an advantage that it can measure the power or the amount of power of a plurality of independent electric circuits with one unit.

  Moreover, according to the electric power measurement system 10 of this embodiment, the measured value measured with the electric power measurement apparatus 1 can be displayed on the display apparatus 8, and can be notified to a user (household of the consumer 100). In the present embodiment, the display device 8 individually displays the measurement values for each of a plurality of electric circuits (the first electric circuit 21 and the second electric circuit 22) that are independent from each other. Therefore, the power measurement system 10 can individually display the measurement values for each of the plurality of electric circuits while measuring the measurement values of the plurality of electric circuits with the single power measurement device 1.

  In addition, when measuring the measured value of a some electric circuit with one power measuring device 1, it is desirable that the phase of the voltage of a some electric circuit corresponds. In this regard, in the present embodiment, since the first electric circuit 21 and the second electric circuit 22 are electrically connected to the same transformer 31, the phases of the voltages of both the electric circuits 21, 22 are substantially the same.

  In addition, as in the present embodiment, the plurality of electric circuits include an electric power line (second electric circuit 22) for purchasing the total amount of electric power generated by the electric power generation device 6 and the electric power supplied from the electric power system 3. It is preferable to include an electric circuit (first electric circuit 21) for supplying power to the load 5. According to this configuration, the power measuring apparatus 1 can measure the measured value for the entire amount purchase electric circuit and the measured value for the electric power supply line in one unit. Therefore, compared with the case where the power measuring device 1 is separately provided in the electric circuit for purchasing the entire amount and the electric circuit for supplying electric power, the cost required for the power measuring device 1 can be reduced, and the power measuring device 1 can be installed. Space can be kept small. However, this configuration is not an essential configuration, and it is arbitrary whether or not the plurality of electric circuits include a total quantity purchase electric circuit and a power supply electric circuit.

  Further, as in the present embodiment, the plurality of electric circuits include a first electric circuit 21 that is electrically connected to the distribution board 4 and a second electric circuit 22 that is electrically disconnected from the distribution board 4. It is preferable to include. According to this configuration, the power measuring apparatus 1 can measure the measured values not only for the electric circuit (first electric circuit 21) passing through the distribution board 4 but also for the electric circuit (second electric circuit 22) not passing through the distribution board 4. Measurement becomes possible. However, this configuration is not an essential configuration, and whether or not the plurality of electric circuits include the first electric circuit 21 and the second electric circuit 22 is arbitrary.

  In this case, the power measuring apparatus 1 further includes a first detector 91 attached to the first electric circuit 21 and a second detector 92 attached to the second electric circuit 22 as in the present embodiment. It is preferable. In this case, the measurement unit 11 is provided in the distribution board 4, measures the measurement value of the first electric circuit 21 from the output of the first detector 91, and outputs the second value from the output of the second detector 92. It is comprised so that the measured value of the electric circuit 22 may be measured. The second detector 92 is provided outside the distribution board 4 and is connected to the measurement unit 11 via the cable 93. According to this structure, since the measurement part 11 is provided in the distribution board 4, the space for installing the measurement part 11 can be restrained small. In addition, since the second detector 92 is connected to the measurement unit 11 in the distribution board 4 via the cable 93 drawn from the distribution board 4, the measurement unit 11 does not pass through the distribution board 4. The measured value can also be measured for the electric circuit 22. However, this configuration is not an essential configuration, and whether or not the power measuring device 1 includes the first detector 91 and the second detector 92 is arbitrary.

(Embodiment 2)
In the present embodiment, the classification units 14 and 15 (see FIG. 1) will be described. Hereinafter, configurations similar to those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted as appropriate.

  In the present embodiment, it is assumed that the first electric circuit 21 is branched into first to seventh branch electric circuits (not shown) by the distribution board 4. The power measuring device 1 measures at least one of power and electric energy for a total of eight electric circuits including seven electric circuits (first electric circuit 21) including the first to seventh branched electric circuits and the second electric circuit 22. It is configured to measure and output as a value. Furthermore, the power measuring device 1 is configured so that these first to seventh branch electric circuits can be handled together.

  Specifically, the power measuring device 1 according to the present embodiment includes classification units 14 and 15. The classification units 14 and 15 are configured to classify a plurality of electric circuits into a plurality of groups. The power measuring apparatus 1 is configured such that measurement by the measurement unit 11 and output by the output unit 12 are performed for each of a plurality of groups. In the present embodiment, as described above, a total of eight electric circuits, that is, the first to seventh branch electric circuits and the second electric circuit 22 are divided into two groups of the first group and the second group in the classification units 14 and 15. An example of the case will be described below.

  However, only one of the (first) classification unit 14 and the (second) classification unit 15 may be provided, and the other is omitted as appropriate. That is, the classification unit 15 is omitted when the power measurement device 1 includes the classification unit 14, and the classification unit 14 is omitted when the power measurement device 1 includes the classification unit 15.

  The (first) classification unit 14 is provided in the distribution board 4 by being provided in the measurement unit 44 (see FIG. 2) or the communication unit 45 (see FIG. 2). The classification unit 14 includes a plurality of switches 141, 141,. Each of the plurality of switches 141, 141,... Is configured to be able to switch a plurality of contact states corresponding one-to-one to a plurality of groups.

  In the present embodiment, eight switches 141, 141,... Are provided so as to correspond to the eight electric circuits (first to seventh branch electric circuits and second electric circuit 22) on a one-to-one basis. Each switch 141 is configured to be able to switch between two contact states so as to correspond to the two groups (first group and second group) on a one-to-one basis. Each switch 141 may be configured to switch a plurality of contact states corresponding to a plurality of groups on a one-to-one basis. For example, each switch 141 includes a rotary switch, a slide type dip switch, or the like.

  The classification unit 14 is configured to classify the plurality of electric circuits into a plurality of groups according to the contact state of each of the plurality of switches 141, 141. In short, the user can select a group of electric circuits corresponding to the switch 141 by operating the switch 141 in the distribution board 4 and selecting the contact state of the switch 141. In the present embodiment, among the eight switches 141, 141..., The first group is selected for the switches 141, 141... Corresponding to the first to seventh branch electric circuits, and the switch 141 corresponding to the second electric circuit 22 is selected. For the second group is selected.

  On the other hand, the (second) classification unit 15 is provided in the controller 7. The classification unit 15 includes a storage unit 151 (see FIG. 1) that stores correspondence relationships between a plurality of electric circuits and a plurality of groups. The classification unit 15 is configured to classify a plurality of electric circuits into a plurality of groups according to the correspondence relationship stored in the storage unit 151.

  In the present embodiment, the storage unit 151 stores the correspondence relationship between eight electric circuits (first to seventh branch electric circuits and second electric circuit 22) and two groups (first group and second group). ing. The correspondence relationship stored in the storage unit 151 is determined by the user operating the display device 8 in the setting mode.

  In short, the user can select a group corresponding to each electric circuit by operating the display device 8 and selecting a group for each electric circuit. In the present embodiment, the first group is selected for the first to seventh branch electric circuits, and the second group is selected for the second electric circuit 22.

  The power measurement device 1 configured as described above can perform measurement by the measurement unit 11 and output by the output unit 12 for each of a plurality of groups. Specifically, the power measuring apparatus 1 measures the measurement values of the first group by adding the measurement values of the seven electric circuits including the first to seventh branch electric circuits in the measurement unit 11. It is configured. Furthermore, the power measuring device 1 is configured to output the measurement values of the first group from the output unit 12 to the display device 8 and display them on the display device 8.

  According to the power measurement device 1 of the present embodiment described above, a plurality of electric circuits (first to seventh branch electric circuits) corresponding to the same group are collectively handled, and the measurement and output unit 12 in the measurement unit 11 is handled. Can be output. That is, since the power measuring device 1 can collect the measurement values output from the output unit 12 in units of groups, there is an advantage that the measurement values can be output in a form that meets the needs of the user (the householder of the customer 100). is there.

  Further, as described above, the classification unit 14 has a plurality of switches 141, 141... Corresponding to a plurality of electric circuits on a one-to-one basis, and each of the plurality of switches 141, 141. It is preferable that a plurality of contact states corresponding to can be switched. According to this configuration, since the classification unit 14 performs grouping by switching the contact state of the switches 141, 141, etc., there is an advantage that the group to which each electric circuit belongs can be known at a glance.

  Or the classification | category part 15 has the memory | storage part 151 which memorize | stores the correspondence of a some electric circuit and a some group, as above-mentioned, and several electric circuit is carried out by the correspondence memorize | stored in the memory | storage part 151. It may be configured to be classified into groups. According to this configuration, there is no need for a dedicated component (hardware switch) for classifying the group, so that the configuration of the power measuring device 1 can be simplified.

  However, the configuration of the classification unit is not limited to the configuration of the (first) classification unit 14 and the (second) classification unit 15 described above, and can be appropriately changed.

  By the way, in this embodiment, although the example where eight electric circuits (the 1st-7th branch electric circuit and the 2nd electric circuit 22) are classified into two groups was shown, it is not restricted to this example and the number of groups is an electric circuit. It may be less than a few.

  For example, the classification unit 14 may be configured to classify the two electric circuits (the first electric circuit 21 and the second electric circuit 22) into the same number (two) groups as the electric circuits as in the first embodiment. In this case, the classification unit 14 classifies the first electric circuit 21 into the first group and classifies the second electric circuit 22 into the second group. As a result, the first electric circuit 21 and the second electric circuit 22 are measured and displayed separately by group.

  Other configurations and functions are the same as those of the first embodiment.

(Embodiment 3)
In the present embodiment, the registration unit 16 (see FIG. 1) will be described. Hereinafter, configurations similar to those of the second embodiment are denoted by the same reference numerals as those of the second embodiment, and description thereof is omitted as appropriate.

  In the present embodiment, as shown in FIG. 5, the power measuring device 1 is used for a customer 200 having a plurality of rooms 201 and 202 with different users, such as a share house. In the consumer 200 of such a form, since the main body which pays consideration with respect to the electric power user for each room 201,202, ie, a supply provider, differs, the electric power measuring device 1 is a plurality of rooms 201,202. It is preferable to measure and output measurement values for each.

  The customer 200 is provided with a plurality (here, two) of electric circuits (not shown) so as to correspond to the plurality of rooms 201 and 202 on a one-to-one basis. In other words, the power measuring device 1 measures the amount of power used for each entity that pays the price to the supplier by measuring at least one of the power and the power amount for each room 201 and 202 as a measured value. Can do. In addition, the consumer 200 in this embodiment is not provided with a power generation device, and there is no electric circuit for purchasing the entire amount.

  In the present embodiment, the controller 7 is configured to be able to communicate with a plurality of information terminals 801 and 802 via the router 80. Similar to the display device 8 (see FIG. 1), the information terminals 801 and 802 are general-purpose information terminals such as a dedicated monitor or a smartphone, a tablet terminal, a television receiver, a personal computer (personal computer), or the like. However, the first information terminal 801 is owned by the user of the first room 201, and the second information terminal 802 is owned by the user of the second room 202.

  In the power measuring apparatus 1 according to the present embodiment, the classification unit 14 (or the classification unit 15) classifies the electric circuit of the first room 201 into the first group, and the electric circuit of the second room 202 is the second electric circuit. Classified into groups.

  The registration unit 16 is provided in the controller 7 in this embodiment. The registration unit 16 is configured to register a plurality of information terminals 801 and 802 in advance in a one-to-one correspondence with a plurality of groups. In the present embodiment, the registration unit 16 stores the identifier of the first information terminal 801 in association with the first group, and stores the identifier of the second information terminal 802 in association with the second group. Thus, the information terminals 801 and 802 are registered. The identifier here is an identifier such as a MAC address unique to each of the information terminals 801 and 802, for example. However, the identifier may be a user ID (and password) individually assigned to the owner of each information terminal 801, 802.

  The output unit 12 (see FIG. 1) is configured to output a measurement value for the electric circuit of the group corresponding to the information terminal when there is a request from one of the information terminals 801 and 802. ing. That is, the controller 7 including the output unit 12, for example, when requested by the first information terminal 801, the electric circuit (in the first room 201 of the first room 201) belonging to the same first group as the first information terminal 801. Only for the electric circuit), the measured value is output to the first information terminal 801. On the other hand, when there is a request from the second information terminal 802, the controller 7 measures only the electric circuit belonging to the same second group as the second information terminal 802 (electric circuit of the second room 202). Is output to the second information terminal 802. The information terminals 801 and 802 display the measurement values received from the controller 7 in the same manner as the display device 8 (see FIG. 1).

  According to the power measurement device 1 of the present embodiment described above, since the access right to the measurement value is given only to the information terminals of the same group, the measurement value can be prevented from being seen by others, and the user's Privacy can be ensured.

  Note that the power measuring device 1 is not limited to a share house, but can be applied to, for example, a two-family house, a house with a store, a house having a room for telecommuting, and the like. Even in this case, it is preferable that the power measuring device 1 measures and outputs the measured values for each of the plurality of rooms, since the power users, that is, the main parties paying the consideration to the supplier are different for each room.

DESCRIPTION OF SYMBOLS 1 Power measuring device 10 Power measuring system 11 Measuring part 111 Processing circuit 12 Output part 14,15 Classification part 141 Switch 151 Storage part 16 Registration part 21 1st electric circuit 22 2nd electric circuit 4 Distribution board 8 Display apparatus 801,802 Information terminal 91 First detector 92 Second detector

Claims (9)

A measurement unit that individually measures at least one of the electric power and the electric energy passing through each of the plurality of independent electric circuits as a measurement value for each of the plurality of electric circuits;
An output unit that individually outputs the measurement values for each of the plurality of electric circuits,
The power measurement device, wherein the measurement unit is configured to perform a process for obtaining the measurement value using a common processing circuit for the plurality of electric circuits. The plurality of electric circuits include an electric circuit for purchasing the entire amount of electric power generated by the electric power generation apparatus to be transmitted to an electric power system, and an electric power supply circuit for supplying electric power supplied from the electric power system to a load. The power measuring device according to claim 1. The plurality of electric circuits include a first electric circuit electrically connected to the distribution board and a second electric circuit electrically disconnected from the distribution board. The power measuring device described in 1. A first detector attached to the first electrical path;
A second detector attached to the second electrical path,
The measurement unit is provided in the distribution board, measures the measurement value of the first electric circuit from the output of the first detector, and calculates the second electric circuit from the output of the second detector. Configured to measure the measured value of
The power detector according to claim 3, wherein the second detector is provided outside the distribution board and connected to the measuring unit via a cable. A classification unit for classifying the plurality of electric circuits into a plurality of groups;
The power measurement device according to claim 1, wherein the measurement by the measurement unit and the output by the output unit are performed for each of the plurality of groups. A registration unit that pre-registers a plurality of information terminals in a one-to-one correspondence with the plurality of groups;
The output unit is configured to output the measurement value for an electric circuit of a group corresponding to the information terminal when there is a request from one information terminal of the plurality of information terminals. The power measuring device according to claim 5. The classification unit includes a plurality of switches corresponding to the plurality of electric circuits on a one-to-one basis,
Each of the plurality of switches is configured to be able to switch a plurality of contact states corresponding to the plurality of groups on a one-to-one basis,
The power measuring device according to claim 5 or 6, wherein the classification unit is configured to classify the plurality of electric circuits into the plurality of groups according to a contact state of each of the plurality of switches. . The classification unit includes a storage unit that stores a correspondence relationship between the plurality of electric circuits and the plurality of groups, and classifies the plurality of electric circuits into the plurality of groups according to the correspondence relationship stored in the storage unit. The power measuring device according to claim 5 or 6, wherein the power measuring device is configured to. The power measuring device according to any one of claims 1 to 8,
A power measurement system comprising: a display device that acquires the measurement value from the output unit and displays the measurement value.

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