JP2017070069A - Circuit determination method, circuit determination system and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circuit determination method, a circuit determination system and a program that can determine the type of a branch circuit while suppressing increase of the number of components of a branch breaker.SOLUTION: A circuit determination method includes a determination step of determining, by using a measurement result of a measurement device 2, which one of a first branch circuit and a second branch circuit each of plural branch circuits 5 is, in accordance with whether or not a first physical quantity and a second physical quantity is coincident with each other. The measurement device 2 measures first current I1 flowing through a first voltage line 41, second current I2 flowing through a second voltage line 42, and branch currents I11 to I18 flowing through each of plural branch circuits 51 to 58. The first physical quantity is a physical quantity for current or electric power of the first voltage line 41 and the second voltage line 42. The second physical quantity is a physical quantity for current or electric power of the plural branch circuits 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a circuit determination method, a circuit determination system, and a program.

  2. Description of the Related Art Conventionally, an energy management system including a memory medium that stores identification information for identifying types of a plurality of branch breakers (wiring breakers) in a distribution board in association with branch circuits connected to each branch breaker has been proposed. (For example, refer to Patent Document 1). Here, the type of branch circuit (branch breaker) includes “voltage” (100 [V] or 200 [V]). In this energy management system, the type (“voltage”) of the branch circuit stored in the memory medium is used when calculating the power consumption based on the measured current.

  The system described in Patent Document 1 is provided with a read / write circuit that reads identification information from each of a plurality of branch breakers mounted on a distribution board and writes the information to a memory medium. The read / write circuit has a detection unit that reads a signal indicating identification information from an information carrier such as an RF (Radio Frequency) tag provided in each branch breaker in a contact or non-contact manner.

Japanese Patent Laying-Open No. 2015-89232

  In the system described in Patent Document 1 described above, each branch breaker is provided with an information carrier. Therefore, compared with a general branch breaker, the number of parts of the branch breaker is increased by the amount of the information carrier. In particular, when the number of branch circuits increases, the number of information carriers increases accordingly, which may lead to a significant increase in the number of parts of the distribution board as a whole.

  The present invention has been made in view of the above problems, and an object thereof is to provide a circuit determination method, a circuit determination system, and a program capable of determining the type of a branch circuit while suppressing an increase in the number of parts of the branch breaker. To do.

  The circuit determination method of the present invention is electrically connected to a power line having a first electric wire, a second electric wire, and a third electric wire, and is used for a distribution board that distributes power from the power line to a plurality of branch circuits. Each of the plurality of branch circuits is electrically connected to one of the first electric wire and the second electric wire and the third electric wire, and to the first electric wire and the second electric wire. Determination method for determining whether the second branch circuit is connected to the second branch circuit, the first current flowing through the first electric wire, the second current flowing through the second electric wire, and the plurality of branches Using the measurement result of the measuring device that measures the branch current flowing through each of the circuits, the first physical quantity for the current or power of the first electric wire and the second electric wire and the first for the current or power of the plurality of branch circuits Depending on whether the two physical quantities match, Wherein each of the number of branch circuits includes a determination step of determining whether it is between the second branch circuit and the first branch circuit.

  The circuit determination system of the present invention is used in a distribution board that is electrically connected to a power line having a first electric wire, a second electric wire, and a third electric wire, and distributes power from the power line to a plurality of branch circuits. The plurality of branch circuits include a first branch circuit electrically connected to one of the first electric wire and the second electric wire and the third electric wire, and an electric connection to the first electric wire and the second electric wire. There are two types of second branch circuits connected to the first branch circuit, and the first current flowing through the first electric wire, the second current flowing through the second electric wire, and the branch current flowing through each of the plurality of branch circuits are measured. And a first physical quantity for the current or power of the first electric wire and the second electric wire and a second physical quantity for the current or electric power of the plurality of branch circuits using the measurement result of the measuring device and the measurement result of the measuring device. The plurality of branch circuits depending on whether or not they match Each characterized by comprising a determination device whether it is between the second branch circuit and the first branch circuit.

  The program of the present invention is a distribution board electrically connected to a power line having a first electric wire, a second electric wire, and a third electric wire, wherein one of the first electric wire and the second electric wire and the first electric wire. A plurality of branch circuits classified into two types, a first branch circuit electrically connected to three wires and a second branch circuit electrically connected to the first wires and the second wires; A computer used with a distribution board that distributes power from a power line measures a first current flowing through the first electric wire, a second current flowing through the second electric wire, and a branch current flowing through each of the plurality of branch circuits. Whether the first physical quantity for the current or power of the first electric wire and the second electric wire matches the second physical quantity for the current or electric power of the plurality of branch circuits using the measurement result of the measuring device Each of the plurality of branch circuits There is function as a determination device whether it is between the second branch circuit and the first branch circuit.

  The circuit determination method of the present invention has the advantage that the type of branch circuit can be determined while suppressing an increase in the number of parts of the branch breaker.

  The circuit determination system of the present invention has an advantage that the type of branch circuit can be determined while suppressing an increase in the number of parts of the branch breaker.

  The program of the present invention has an advantage that the type of branch circuit can be determined while suppressing an increase in the number of parts of the branch breaker.

It is a block diagram which shows the structure of the circuit determination system which concerns on embodiment. It is a block diagram which shows the structure of the distribution board which concerns on embodiment. FIG. 3A is a waveform diagram schematically illustrating a current waveform in the case of normal construction, FIG. 3A is a waveform diagram of a current flowing through the first electric wire, and FIG. 3B is a waveform diagram of a current flowing through the second electric wire. FIG. 4A is a waveform diagram of a current flowing through the first wire, and FIG. 4B is a waveform diagram of a current flowing through the second wire. It is a flowchart explaining operation | movement of the circuit determination system which concerns on embodiment.

  The following embodiments relate to a circuit determination method, a circuit determination system, and a program, and more particularly to a circuit determination method and circuit determination used for a distribution board connected to a power line having a first electric wire, a second electric wire, and a third electric wire. The present invention relates to a system and a program.

  The circuit determination method and circuit determination system of this embodiment are a method and system for determining the type of each of a plurality of branch circuits used in a distribution board.

  For example, in the case of a single-phase three-wire distribution system, as shown in FIG. 1, the distribution board includes a first voltage line 41 (L1), a second voltage line 42 (L2), and a neutral line 43 (N). Are electrically connected to the power line 4. In this case, the first voltage line 41 constitutes a “first electric wire”, the second voltage line 42 constitutes a “second electric wire”, and the neutral wire 43 constitutes a “third electric wire”.

  The distribution board distributes the AC power from the power line 4 to a plurality (eight in this embodiment) of branch circuits 51 to 58. Therefore, the plurality of branch circuits 51 to 58 include a “first branch circuit” electrically connected to one of the first voltage line 41 and the second voltage line 42 and the neutral line 43, and the first voltage line. There are two types: a “second branch circuit” electrically connected to 41 and the second voltage line 42. In the following description, each of the plurality of branch circuits 51 to 58 is also referred to as a “branch circuit 5” unless the branch circuits 51 to 58 are particularly distinguished. In addition, the “branch circuit” referred to here is a branch breaker, a wiring path connected to the secondary side of the branch breaker, a wiring device (outlet, wall switch, etc.), and various devices (lighting device, cooking appliance, etc.) Is included.

  Here, if the voltage between the first voltage line 41 or the second voltage line 42 and the neutral line 43 is 100 [V] (effective value), the “first branch circuit” has 100 [V]. V] is applied, and 200 [V] is applied to the “second branch circuit”. The circuit determination method and the circuit determination system automatically determine which of the two types of branch circuits (the first branch circuit and the second branch circuit) with different applied voltages corresponds to each of the plurality of branch circuits 5. A method and system for determining.

  That is, according to the circuit determination method of the present embodiment, each of the plurality of branch circuits 5 is “first branch circuit” depending on whether or not the first physical quantity and the second physical quantity match using the measurement result of the measuring device 2. ”Or“ second branch circuit ”is included. The measuring device 2 measures the first current I1 flowing through the first voltage line 41 (L1), the second current I2 flowing through the second voltage line 42 (L2), and the branch current flowing through each of the plurality of branch circuits 5. . The first physical quantity is a physical quantity regarding the current or power of the first voltage line 41 and the second voltage line 42. The second physical quantity is a physical quantity regarding the current or power of the plurality of branch circuits 5.

  Moreover, the circuit determination system of this embodiment is provided with the measurement apparatus 2 and the determination apparatus 3, as shown in FIG. The measuring device 2 measures the first current I1 flowing through the first voltage line 41 (L1), the second current I2 flowing through the second voltage line 42 (L2), and the branch current flowing through each of the plurality of branch circuits 5. . The determination device 3 uses the measurement result of the measurement device 2 to determine whether each of the plurality of branch circuits 5 is a “first branch circuit” or a “second branch circuit”. At this time, the determination device 3 determines the type of each of the plurality of branch circuits 5 depending on whether or not the first physical quantity and the second physical quantity match.

  By the way, in recent years, a power measurement system that measures at least one of power consumption and power consumption as a measured value for each of the plurality of branch circuits 5 has become widespread. In a general power measurement system, the power consumption in each of the plurality of branch circuits 5 is determined from the voltage value applied to each of the plurality of branch circuits 5 and the current value flowing through each of the plurality of branch circuits 5. And power consumption is required. Therefore, when the plurality of branch circuits 5 include two types of branch circuits having different applied voltages as described above, in the power measurement system, in order to accurately determine the power consumption and the power consumption amount, the plurality of branches Each type of the circuit 5 needs to be set correctly. That is, for each of the plurality of branch circuits 5, information indicating whether the applied voltage is 100 [V] or 200 [V] (hereinafter referred to as “voltage classification”) needs to be set correctly.

  In this type of power measurement system, the voltage classification is conventionally set manually by a distribution board or power measurement system contractor using a mechanical switch such as a dip switch or a dedicated setting device. However, when the contractor manually performs the setting, there is a possibility that the setting may be forgotten or wrong due to a human error, and therefore it is desired to automate the setting of the voltage classification.

  Therefore, in the present embodiment, a case where the circuit determination method and the circuit determination system for automatically determining each type of the plurality of branch circuits 5 are applied to the power measurement system and the voltage classification setting is automated is taken as an example. A circuit determination method and a circuit determination system will be described. However, the use of the circuit determination method and the circuit determination system of the present embodiment is not limited to the power measurement system as long as it is an application for automatically determining the type of each of the plurality of branch circuits 5. May be used for

  Hereinafter, the circuit determination method and the circuit determination system of this embodiment will be described in detail. However, the configuration described below is merely an example of the present invention, and the present invention is not limited to the following embodiment. Therefore, various modifications other than this embodiment can be made according to the design and the like as long as they do not depart from the technical idea of the present invention.

  In the present embodiment, the circuit determination method and the circuit determination system are applied to a power measurement system for measuring at least one of power consumption and power consumption at a customer facility, and voltage classification is performed for each of the plurality of branch circuits 5. Used for setting. The term “customer facility” as used herein means a facility of an electric power consumer, not only a facility that receives power supply from an electric power company such as an electric power company, but also a private power generation facility such as a solar power generation facility. Includes facilities that receive power. In this embodiment, a detached house will be described as an example of a customer facility.

  First, a basic configuration of a power measurement system 1 to which a circuit determination method and a circuit determination system are applied will be described with reference to FIG.

  As shown in FIG. 1, the power measurement system 1 of the present embodiment includes a measurement device 2 and a determination device 3, an arithmetic device 11 that calculates power consumption and power consumption, and a storage device 12 that stores voltage classifications. And a setting device 13 for setting the voltage classification. Furthermore, the power measurement system 1 includes a plurality of current sensors 21, 22, 201 to 208 in order to measure a plurality of currents. Here, the components of the power measurement system 1 are the same as the components of the circuit determination system except for the arithmetic device 11. That is, the circuit determination system of the present embodiment includes a measurement device 2, a determination device 3, a storage device 12, a setting device 13, and a plurality of current sensors 21, 22, 201 to 208. Note that the plurality of current sensors 21, 22, 201 to 208 may be included in the measuring device 2.

  In the present embodiment, the components of the power measurement system 1 (the measurement device 2, the determination device 3, the calculation device 11, the storage device 12, the setting device 13, and the current sensors 21, 22, 201 to 208) It is stored in a cabinet 60 (see FIG. 2) of the board 6 (see FIG. 2).

  The measuring device 2 is electrically connected to each of a pair of (main) current sensors 21 and 22 and a plurality of (branch) current sensors 201 to 208. The pair of current sensors 21 and 22 are provided corresponding to the first voltage line 41 and the second voltage line 42 on a one-to-one basis, and the plurality of current sensors 201 to 208 correspond to the plurality of branch circuits 5 on a one-to-one basis. Is provided. Thereby, in the measuring device 2, the first current I1 flowing through the first voltage line 41 can be measured from the output of the current sensor 21, and the second current I2 flowing through the second voltage line 42 is measured from the output of the current sensor 22. Is possible. Further, the measuring device 2 can measure the current flowing through each of the plurality of branch circuits 5 (hereinafter referred to as “branch current”) from the outputs of the plurality of current sensors 201 to 208. Hereinafter, each of the plurality of current sensors 201 to 208 is also referred to as a “current sensor 20” unless the plurality of current sensors 201 to 208 for measuring the branch current are particularly distinguished.

  Hereinafter, the branch current flowing through the branch circuit 51, that is, the branch current measured by the current sensor 201 is referred to as “branch current I11”. Similarly, a branch current flowing through the branch circuit 5n (n is a natural number), that is, a branch current measured by the current sensor 20n (n is a natural number) is referred to as “branch current I1n”.

  The determination device 3 is electrically connected to the measurement device 2, and using the measurement result of the measurement device 2, each of the plurality of branch circuits 5 is “first branch circuit” and “second branch circuit”. It is determined whether it is. The measurement result of the measurement device 2 here is a measurement result of each current (first current I1, second current I2, and branch current) in the measurement device 2, and is, for example, an effective value or a current waveform.

  Here, the determination device 3 has, for example, a microcomputer as a main component, and implements various functions by executing a program recorded in the memory of the microcomputer by a CPU (Central Processing Unit). The program may be recorded in advance in a memory of a microcomputer, may be provided by being recorded on a recording medium such as a memory card, or may be provided through an electric communication line. The circuit determination operation of the determination device 3, that is, the determination step in the circuit determination method will be described later.

  In the present embodiment, the determination device 3 determines the type of each of the plurality of branch circuits 5 at least when the circuit determination system (power measurement system 1) is started (or restarted), that is, when the power is turned on. . The determination device 3 once determines whether it is the “first branch circuit” or the “second branch circuit”, and thereafter the “first branch circuit” and the “second branch” are periodically determined. It is configured to determine which is a “circuit”. Thereby, the determination apparatus 3 can reduce the processing load (calculation load) related to determination.

  The arithmetic device 11 is electrically connected to the measuring device 2 and uses at least one of the power consumption and the power consumption amount as a measured value for each of the plurality of branch circuits 5 using the measurement result of the measuring device 2. measure. The measured value may be power consumption representing instantaneous power, or may be power consumption representing power consumption (usage) for a certain period of time. Further, the measured value may be both power consumption and power consumption. In this embodiment, as an example, the measured value is assumed to be power consumption.

  The arithmetic device 11 monitors the line voltage of the power line 4 (the first voltage line 41, the second voltage line 42, and the neutral line 43). The computing device 11 is composed of, for example, a microcomputer, and obtains a measured value by computing using a line voltage and a branch current. In addition, in the arithmetic unit 11, the structure which calculates | requires not only the measured value about each of several branch circuit 5 but the total power consumption of a consumer facility as a measured value may be sufficient.

  The storage device 12 stores, for each of the plurality of branch circuits 5, whether it is a “first branch circuit” or a “second branch circuit”. In other words, the storage device 12 stores each voltage division of the plurality of branch circuits 5 (information indicating whether the applied voltage is 100 [V] or 200 [V]). That is, among the plurality of branch circuits 51 to 58, the branch circuit 51 to 54 that is the “first branch circuit” is stored in association with the voltage classification of 100 [V]. For a certain branch circuit 55 to 58, a voltage classification of 200 [V] is stored in association with each other.

  In this embodiment, a circuit number (1, 2, 3,...) Is used as an identification code for identifying each of the plurality of branch circuits 5, and an individual circuit number is assigned to each position of the branch breaker 62. For example, for the upper branch breaker 62, odd numbers (1, 3, 5, 7,...) Are assigned as circuit numbers sequentially from the main breaker 61 side. For the lower branch breaker 62, even numbers (2, 4, 6, 8,...) Are assigned as circuit numbers in order from the main breaker 61 side. And the memory | storage device 12 memorize | stores a voltage division in a table format for every identification code (circuit number) so that a voltage division (type of branch circuit) may correspond to the some branch circuit 5 on a one-to-one basis. In addition, how to assign the circuit number to the branch circuit 5 is not limited to the above-described example, and can be arbitrarily determined.

  The storage device 12 is electrically connected to the arithmetic device 11. In the arithmetic device 11, the measurement value can be obtained with high accuracy by correcting the arithmetic result in accordance with the voltage classification stored in the storage device 12.

  The setting device 13 is electrically connected to the storage device 12 and sets voltage classifications stored in the storage device 12. Here, the determination device 3 is electrically connected to the setting device 13, and the setting device 13 is configured to write the determination result of the determination device 3 in the storage device 12. That is, the setting device 13 receives the determination result in the determination device 3 that indicates whether each of the plurality of branch circuits 5 is the “first branch circuit” or the “second branch circuit”, and then stores the storage device. The voltage classification is written to 12.

  Next, the configuration of the distribution board 6 will be described with reference to FIG.

  As shown in FIG. 2, the distribution board 6 includes a main breaker 61 electrically connected to the power line 4 and a plurality of branch breakers 62 electrically connected to secondary terminals of the main breaker 61. 60. Further, the distribution board 6 includes a measurement unit 63, a setting unit 64, current sensors 21 and 22, and sensor units 23 and 24 in the cabinet 60.

  In the present embodiment, as an example, functions of the measurement device 2 and the determination device 3 among the components of the power measurement system 1 are provided in the measurement unit 63. Similarly, the functions as the storage device 12 and the setting device 13 are provided in the setting unit 64, and the functions as the arithmetic device 11 and the current sensors 201 to 208 are provided in the sensor units 23 and 24.

  The primary side terminal of the main breaker 61 is electrically connected to the system power supply 7 (see FIG. 1) via the power line 4 of the three-wire system (first voltage line 41, second voltage line 42, and neutral line 43). It is connected. The secondary terminal of the main breaker 61 is connected to a three-pole conductive bar of L1, L2, and N. These three-pole conductive bars are electrically connected to the first voltage line 41 (L1), the second voltage line 42 (L2), and the neutral line 43 (N) on a one-to-one basis.

  The plurality of branch breakers 62 are electrically connected to the secondary terminal of the main breaker 61 by being connected to the conductive bar. The plurality of branch breakers 62 are divided into both sides (upper and lower) in the width direction of the conductive bar, and a plurality of branch breakers 62 are arranged.

  Here, among the plurality of branch breakers 62, the branch breakers 62 included in the branch circuits 51 to 54 that are “first branch circuits” include either one of the conductive bars L <b> 1 and L <b> 2 and the N conductive bars. It is connected. In addition, among the plurality of branch breakers 62, the branch breakers 62 included in the branch circuits 55 to 58 which are “second branch circuits” are connected to the L1 conductive bar and the L2 conductive bar. As a result, each of the branch circuits 51 to 54 serving as the “first branch circuit” is connected to one of the first voltage line 41 (L1) and the second voltage line 42 (L2) and the neutral line 43 (N). It will be electrically connected. In addition, each of the branch circuits 55 to 58 serving as the “second branch circuit” is electrically connected to the first voltage line 41 (L1) and the second voltage line 42 (L2).

  Here, the branch breaker 62 for 100 [V], that is, the branch breaker 62 of the branch circuit 5 classified as the “first branch circuit” is connected to the first voltage line 41 in a state where it is attached to the upper stage of the conductive bar. It is electrically connected to the neutral wire 43. On the other hand, when attached to the lower stage of the conductive bar, the branch breaker 62 for 100 [V] is electrically connected to the second voltage line 42 and the neutral line 43. Further, the branch breaker 62 for 200V, that is, the branch breaker 62 of the branch circuit 5 classified as the “second branch circuit”, regardless of the upper and lower stages of the conductive bar, is the first voltage line 41 and the second voltage line 42. And is electrically connected.

  Each of the pair of current sensors 21 and 22 and the pair of sensor units 23 and 24 is electrically connected to the measurement unit 63. As the current sensors 21, 22, 201 to 208, for example, a magnetoresistive element such as a CT (Current Transformer) sensor, a Hall element, a GMR (Giant Magnetic Resistances) element, a shunt resistance, or the like is used. In the present embodiment, as an example, each of the current sensors 21 and 22 includes a CT sensor. On the other hand, each of the plurality of current sensors 20 provided in the sensor units 23 and 24 is a Rogowski coil that includes an air-core coil that does not use a core (coreless) and generates an output corresponding to a current passing through the through hole. .

  The pair of current sensors 21 and 22 are attached to the power line 4 so as to measure the current of the power line 4 connected to the primary side terminal of the main breaker 61. Here, of the pair of current sensors 21 and 22, one (first) current sensor 21 is attached to the first voltage line 41, and the other (second) current sensor 22 is connected to the second voltage line 42. It is attached. Thereby, in the measuring device 2 provided in the measuring unit 63, the first current I1 flowing through the first voltage line 41 can be measured from the output of the current sensor 21, and the second voltage line 42 flows from the output of the current sensor 22. The second current I2 can be measured.

  Each of the pair of sensor units 23, 24 is arranged between the plurality of branch breakers 62 and the conductive bar so as to measure the current of each of the plurality of branch breakers 62 connected to the secondary terminal of the main breaker 61. It is attached. Each of the pair of sensor units 23, 24 includes a plurality of current sensors 20, and the plurality of current sensors 20 are attached to the plurality of branch breakers 62 so as to correspond one-to-one. Thereby, in the measuring device 2 provided in the measuring unit 63, the branch current flowing through each of the plurality of branch circuits 5 can be measured from the outputs of the pair of sensor units 23 and 24.

  In the present embodiment, the function as the arithmetic unit 11 is provided in the pair of sensor units 23 and 24. Therefore, the pair of sensor units 23 and 24 are configured to output the measurement value (power consumption) obtained by the arithmetic device 11 to the measurement unit 63 in addition to the branch current flowing through each of the plurality of branch circuits 5. Has been.

  Here, the upper branch breaker 62 of the conductive bar is electrically connected to the first voltage line 41 regardless of whether it is for 100 [V] or 200 [V]. On the other hand, the lower branch breaker 62 of the conductive bar is electrically connected to the second voltage line 42 regardless of whether it is for 100 [V] or 200 [V]. Therefore, in the sensor unit 23 that measures the current of the upper branch breaker 62, the plurality of current sensors 20 are installed between the first voltage line 41 and the branch breaker 62, and the first voltage line 41 and the branch breaker 62 are arranged. Measure the current between. On the other hand, in the sensor unit 24 that measures the current of the lower branch breaker 62, the plurality of current sensors 20 are installed between the second voltage line 42 and the branch breaker 62, and the second voltage line 42 and the branch breaker 62 are arranged. Measure the current between.

  The setting unit 64 is electrically connected to the measurement unit 63. The setting unit 64 is provided with functions as the storage device 12 and the setting device 13. Therefore, in the setting unit 64, the voltage classification is automatically set using the determination result of the determination device 3 of the measurement unit 63.

  The setting unit 64 has a function as a communication adapter that communicates with a controller provided outside the distribution board 6 and transmits a measurement value obtained by the measurement unit 63 to the controller. The controller referred to here is a HEMS (Home Energy Management System) controller, which can display a measurement value on a monitor or control a device (compatible with HEMS) based on the measurement value.

  Next, the circuit determination operation of the determination device 3 in the power measurement system 1 of the present embodiment, that is, the determination step in the circuit determination method of the present embodiment will be described.

  In the present embodiment, the determination device 3 uses the measurement result of the measurement device 2 to determine whether each of the plurality of branch circuits 5 is a “first branch circuit” or a “second branch circuit”. To do. At this time, the determination device 3 determines the type of each of the plurality of branch circuits 5 depending on whether or not the first physical quantity and the second physical quantity match. The first physical quantity is a physical quantity regarding the current or voltage of the first voltage line 41 and the second voltage line 42. The second physical quantity is a physical quantity regarding the current or voltage of the plurality of branch circuits 5.

  The first physical quantity here is a current waveform of a first current I1 and a current waveform of a second current I2 extracted in a determination period described later. The second physical quantity is a combined waveform (first combined waveform, second combined waveform) obtained by combining the current waveforms of the branch currents of the two or more branch circuits 5 extracted in the determination period. Specifically, the determination device 3 uses, as the second physical quantity, current waveforms of branch currents I11, I12, and I15 to I18 that flow through the branch circuits 51, 52, and 55 to 58 electrically connected to the first voltage line 41. A first synthesized waveform obtained by synthesizing is extracted. Further, the determination device 3 extracts, as the second physical quantity, a second synthesized waveform obtained by synthesizing the current waveforms of the branch currents I13 to I18 flowing through the branch circuits 53 to 58 electrically connected to the second voltage line 42.

  Here, the determination device 3 compares the current waveform of the first current I1 with the first combined waveform, and compares the current waveform of the second current I2 with the second combined waveform, thereby matching or mismatching the two. And the type of the branch circuit 5 is determined from the determination result. At this time, the determination device 3 compares the current waveform of the first current I1 with the first combined waveform and compares the current waveform of the second current I2 with the second combined waveform, for example, by pattern matching. The degree of coincidence (degree of coincidence) of is calculated numerically. Then, the determination device 3 determines that the current waveform of the first current I1 matches the first combined waveform if the degree of matching between the current waveform of the first current I1 and the first combined waveform is greater than or equal to the threshold value. The determination device 3 determines that the current waveform of the second current I2 matches the second combined waveform if the matching degree of the current waveform of the second current I2 and the second combined waveform is equal to or greater than the threshold value.

  Then, the determination device 3 determines whether or not the current waveform of the first current I1 matches the first combined waveform, and whether the current waveform of the second current I2 matches the second combined waveform. Each type of the branch circuit 5 is determined.

  In the present embodiment, the determination device 3 sets a determination period for extracting the current waveform of the first current I1, the current waveform of the second current I2, and the current waveforms of the plurality of branch circuits 5. At least when the circuit determination system (power measurement system 1) is activated (or restarted), that is, when the power is turned on, the determination device 3 sets a determination period and determines the type of each of the plurality of branch circuits 5. . Even when the circuit determination system is activated (or restarted), the determination period may be set periodically (periodically) or may be set irregularly. Moreover, the determination period may be set continuously and repeatedly.

  Next, a specific example of the circuit determination operation of the determination device 3, that is, a specific example of the determination step in the circuit determination method will be described with reference to FIGS. 3A, 3B, 4A, and 4B. 3A and 3B are waveform diagrams schematically showing current waveforms when the voltage divisions of the plurality of branch circuits 5 are normally set.

  The determination device 3 uses the measurement result of the measurement device 2 to use the current waveform of the first current I1 flowing through the first voltage line 41, the current waveform of the second current I2 flowing through the second voltage line 42, and a plurality of branch circuits. 5 is obtained. Then, the determination device 3 determines the type of each of the plurality of branch circuits 5 depending on whether the current waveform for the first voltage line 41 matches or whether the current waveform for the second voltage line 42 matches. judge.

  As shown in FIG. 3A, the determination device 3 includes a current waveform of the first current I1 and branch circuits 51, 52, 55 to 58 electrically connected to the first voltage line 41 for the first voltage line 41. The first combined waveform obtained by combining the current waveforms of the flowing branch currents I11, I12, and I15 to I18 is compared. Here, in the present embodiment, the current sensors 201, 202, 205, and 208 are provided between the first voltage line 41 (L1) and the branch circuit 5, whereas the current sensors 206 and 207 are the first sensors. It is provided between the two voltage lines 42 (L2) and the branch circuit 5. Therefore, the current detection direction by the current sensors 201, 202, 205, and 208 is opposite to the current detection direction by the current sensors 206 and 207. That is, the phases of the branch currents I16 and I17 detected by the current sensors 206 and 207 are inverted with respect to the branch currents I11, I12, I15, and I18 as shown in FIG. 3A. Then, the determination device 3 determines that the current waveform of the first current I1 matches the first combined waveform because each voltage division of the plurality of branch circuits 5 is normally set.

  Further, as shown in FIG. 3B, the determination device 3 determines the current waveform of the second current I2 and each of the branch circuits 53 to 58 electrically connected to the second voltage line 42 for the second voltage line 42. A second combined waveform obtained by combining the current waveforms of the flowing branch currents I13 to I18 is compared. Here, in the present embodiment, the current sensors 203, 204, 206, and 207 are provided between the second voltage line 42 (L2) and the branch circuit 5, whereas the current sensors 205 and 208 are the first ones. One voltage line 41 (L1) and the branch circuit 5 are provided. Therefore, the current detection direction by the current sensors 203, 204, 206, and 207 is opposite to the current detection direction by the current sensors 205, 208. That is, the phases of the branch currents I15 and I18 detected by the current sensors 205 and 208 are inverted with respect to the branch currents I13, I14, I16, and I17 as shown in FIG. 3B. Then, the determination device 3 determines that the current waveform of the second current I2 matches the second combined waveform because each voltage division of the plurality of branch circuits 5 is normally set.

  Accordingly, the determination device 3 matches the current waveform of the first current I1 with the first combined waveform and the current waveform of the second current I2 with the second combined waveform. It is determined that each is normally set to either the “first branch circuit” or the “second branch circuit”.

  4A and 4B schematically show current waveforms when the voltage section is set to 100 [V] with respect to the branch circuit 55 in which the voltage section should be set to 200 [V] among the plurality of branch circuits 5. FIG.

  As shown in FIG. 4A, the determination device 3 includes a current waveform of the first current I1 and branch circuits 51, 52, 55 to 58 electrically connected to the first voltage line 41 for the first voltage line 41. The first combined waveform obtained by combining the current waveforms of the flowing branch currents I11, I12, and I15 to I18 is compared. In this case, the determination device 3 determines that the current waveform of the first current I1 and the first combined waveform are the same as in FIG. 3A.

  In addition, as shown in FIG. 4B, the determination device 3 determines the current waveform of the second current I2 and each of the branch circuits 53 to 58 electrically connected to the second voltage line 42 for the second voltage line 42. A second combined waveform obtained by combining the current waveforms of the flowing branch currents I13 to I18 is compared. Here, since the voltage classification of the branch circuit 55 is set to 100 [V], the branch current I15 flowing through the branch circuit 55 is not added as shown in FIG. 4B. Therefore, the determination device 3 determines that the current waveform of the second current I2 does not match the second composite waveform (see FIG. 4B).

  Then, the determination device 3 matches the current waveform of the first current I1 and the first combined waveform, but does not match the current waveform of the second current I2 and the second combined waveform. It is determined that the voltage classification of (branch circuit 55 here) is set incorrectly.

  By the way, in the distribution board 6 installed in a detached house, the “first branch circuit” in which the voltage classification is 100 [V] is more than the “second branch circuit” in which the voltage classification is 200 [V]. It is common to increase. Therefore, when determining whether each of the plurality of branch circuits 5 is the “first branch circuit” or the “second branch circuit”, all the branch circuits 5 are “first branch circuits”. It is preferable to increase the “second branch circuit” one by one from the assumed state.

  For example, when the eight branch circuits 5 are provided as in the present embodiment, the determination device 3 starts the determination operation on the assumption that all the eight branch circuits 5 are “first branch circuits”. . Then, in the above assumption, the determination device 3 has eight branches when the current waveform of the first current I1 matches the first combined waveform and the current waveform of the second current I2 matches the second combined waveform. It is determined that all of the circuits 5 are “first branch circuits”. Further, in the above assumption, when the current waveform of the first current I1 does not match the first combined waveform, or when the current waveform of the second current I2 does not match the second combined waveform, It is determined that the assumption that all of the branch circuits 5 are “first branch circuits” is incorrect. Then, the determination device 3 continues the determination operation assuming that the seven branch circuits 5 are “first branch circuits” and the one branch circuit 5 is “second branch circuit”.

  In the above assumption, when the current waveform of the first current I1 matches the first combined waveform and the current waveform of the second current I2 matches the second combined waveform, the determination device 3 has seven branch circuits 5. Are determined to be “first branch circuit” and one branch circuit 5 is “second branch circuit”. Further, in the above assumption, when the current waveform of the first current I1 does not match the first combined waveform, or when the current waveform of the second current I2 does not match the second combined waveform, the determination device 3 It is determined that the assumption that the branch circuit 5 is the “first branch circuit” is incorrect. The determination device 3 continues the determination operation assuming that the six branch circuits 5 are “first branch circuits” and the two branch circuits 5 are “second branch circuits”. In the same manner, the determination device 3 repeats the determination operation until the current waveform of the first current I1 matches the first combined waveform and the current waveform of the second current I2 matches the second combined waveform. .

  According to this configuration, it is possible to reduce the arithmetic processing for determining whether each of the plurality of branch circuits 5 is the “first branch circuit” or the “second branch circuit”, and in a short time It can be determined efficiently.

  In addition, as described above, when the setting unit 64 is configured to communicate with the HEMS controller, the name of the device (corresponding to HEMS) included in each of the plurality of branch circuits 5 is the storage device of the setting unit 64. 12 is stored. That is, in this case, the 200 [V] device and the 100 [V] device can be identified from the name stored in the storage device 12. As described above, since there are more “first branch circuits” including 100 [V] devices than “second branch circuits” including 200 [V] devices, the “second branch circuit” having a smaller number of circuits. There is a high possibility that the voltage category of “circuit” is set incorrectly. Accordingly, the determination device 3 preferentially selects the branch circuit 5 including 200 [V] devices such as “air conditioner”, “IH cooker”, and “electric water heater”, and becomes “first branch circuit”. It is preferable to determine whether it is a “second branch circuit”. As described above, the determination operation can be efficiently performed in a short time by sequentially performing the determination operation from the branch circuit 5 including the 200 [V] device having a small number of circuits.

  By the way, in the above-described embodiment, the determination device 3 compares the current waveform of the first current I1 with the first combined waveform, and compares the current waveform of the second current I2 with the second combined waveform, The type of the branch circuit 5 is determined. On the other hand, the determination device 3 may determine the type of the branch circuit 5 by comparing the first power value and the second power value. The first power value here is the power value (power consumption) of the first voltage line 41 obtained from the first current I1, and the power value (power consumption) of the second voltage line 42 obtained from the second current I2. The first power value is the first physical quantity. The second power value is a power value obtained by adding a multiplication value obtained by multiplying each power value (power consumption) of each of the plurality of branch circuits 5 obtained from the branch current by a coefficient corresponding to each of the plurality of branch circuits 5. The second power value is the second physical quantity. Then, in the determination step, the determination device 3 determines the type of the plurality of branch circuits 5 depending on whether or not the first power value and the second power value match. Hereinafter, modifications of the present embodiment will be described.

  For example, the power value of the first voltage line 41 obtained from the first current I1 is W1, the power value of the second voltage line 42 obtained from the second current I2 is W2, and a plurality of branch circuits obtained from the branch currents I11 to I18. The power values of 51 to 58 are assumed to be W11 to W18. Note that these power values are output from the arithmetic device 11 to the determination device 3 via the measurement device 2 as described above. In FIG. 1, the branch circuits 51 to 54 are “first branch circuits”, and the branch circuits 55 to 58 are “second branch circuits”. When the voltage divisions of the plurality of branch circuits 5 are normally set, W1 + W2 = W11 + W12 + W13 + W14 + W15 + W16 + W17 + W18. Therefore, the determination device 3 has the first power value and the second power value match. Judge. Thus, when the voltage divisions of the plurality of branch circuits 5 are normally set, the coefficients of the branch circuits 5 are all 1.

  Here, for example, when the voltage division of the branch circuit 55 that should be set to 200 [V] is set to 100 [V], W1 + W2 = W11 + W12 + W13 + W14 + W15 × 0.5 + W16 + W17 + W18. That is, by multiplying the value measured as the power value of the branch circuit 55 by 0.5, the first power value and the second power value coincide with each other. It is determined that For example, when the voltage division of the branch circuit 52 that should be set to 100 [V] is set to 200 [V], W1 + W2 = W11 + W12 × 2 + W13 + W14 + W15 + W16 + W17 + W18. That is, since the first power value matches the second power value by doubling the value measured as the power value of the branch circuit 52, the determination device 3 has an incorrect voltage classification of the branch circuit 52. Is determined.

  Moreover, in the structure which compares an electric power value like the above-mentioned modification, it is also possible to determine construction mistakes, such as the fitting failure of a split-type current sensor, and the mistake of a measurement place, for example.

  In the above-described modification, the determination device 3 determines the type of the branch circuit 5 by comparing the first power value and the second power value. The type of the branch circuit 5 may be determined by comparing the effective values obtained from the above. In this case, the determination device 3 uses the effective value of the first current I1 obtained from the current waveform of the first current I1 and the effective value of the second current I2 obtained from the current waveform of the second current I2 as the first physical quantity. To obtain a first effective value. Moreover, the determination apparatus 3 calculates | requires the 2nd effective value which added the effective value of the branch current obtained from a 1st synthetic | combination waveform, and the effective value of the branch current obtained from a 2nd synthetic | combination waveform as a 2nd physical quantity. Then, the determination device 3 determines the type of the branch circuit 5 depending on whether or not the first effective value and the second effective value match.

  Further, according to the circuit determination method and the circuit determination system of the present embodiment, it is determined whether or not the current sensor 21 attached to the first voltage line 41 and the current sensor 22 attached to the second voltage line 42 are erroneously constructed. It is also possible to do. Hereinafter, the operation of the determination device 3 will be described with reference to the flowchart shown in FIG.

  The determination device 3 determines whether or not the current waveform of the first current I1 matches the first combined waveform (step S1). If the determination device 3 determines that the current waveform of the first current I1 and the first composite waveform do not match (No in step S1), the polarity of the first composite waveform is inverted and the first after the inversion is performed. It is determined whether or not the combined waveform and the current waveform of the first current I1 match (step S4). If the determination device 3 determines that the inverted first composite waveform and the current waveform of the first current I1 match (Yes in step S4), the current sensor 21 is set so that the polarity is reversed. It is determined that the first voltage line 41 is attached (step S5). If the determination device 3 determines that the inverted first composite waveform does not match the current waveform of the first current I1 (No in step S4), it determines that there is another abnormality (step S6). ). Other abnormalities include, for example, poor fitting of the split-type current sensor 21, breakage of the current sensor 21, measurement failure in the branch circuit 5, and the like.

  If the determination device 3 determines that the current waveform of the first current I1 matches the first combined waveform (Yes in step S1), the current waveform of the second current I2 matches the second combined waveform. It is determined whether or not (step S2). When the determination device 3 determines that the current waveform of the second current I2 and the second combined waveform do not match (No in step S2), the polarity of the second combined waveform is inverted and the second after the inversion is performed. It is determined whether or not the combined waveform and the current waveform of the second current I2 match (step S7). If the determination device 3 determines that the second composite waveform after inversion and the current waveform of the second current I2 match (Yes in step S7), the current sensor 22 is set so that the polarity is reversed. It is determined that the second voltage line 42 is attached (step S8). Further, when the determination device 3 determines that the inverted second composite waveform and the current waveform of the second current I2 do not match (No in step S7), the determination device 3 determines that there is another abnormality (step S9). ). Other abnormalities include, for example, poor fitting of the split-type current sensor 22, damage to the current sensor 22, and measurement failure in the branch circuit 5.

  If the determination device 3 determines that the current waveform of the second current I2 matches the second combined waveform (Yes in step S2), whether or not the first power value and the second power value match. Is determined (step S3). And when the determination apparatus 3 determines that the first power value and the second power value when the coefficients of all the branch circuits 5 are set to 1 (Yes in step S3), it is normally constructed. Determine and end the determination step. If the determination device 3 determines that the first power value and the second power value do not match when the coefficients of all the branch circuits 5 are 1 (No in step S3), a plurality of branch circuits 5, it is determined that there is a setting error in any branch circuit 5 (step S10). In step S10, if one of the first power value and the second power value is minus 1 and the two match, the determination device 3 indicates that either one of the current sensors 21 and 22 has the opposite polarity. Judge that there is.

  According to the circuit determination method of the present embodiment described above, the determination step of determining the type of the branch circuit 5 using the measurement result of the measurement device 2 is included. The measuring device 2 measures a first current I1 flowing through the first voltage line 41, a second current I2 flowing through the second voltage line 42, and a branch current flowing through each of the plurality of branch circuits 5. In this determination step, the type of the branch circuit 5 is determined based on whether or not the first physical quantity and the second physical quantity match. The first physical quantity is a physical quantity regarding the current or power of the first voltage line 41 and the second voltage line 42. The second physical quantity is a physical quantity regarding the current or power of the plurality of branch circuits 5.

  Therefore, in this circuit determination method, which of the two types of branch circuits (first branch circuit and second branch circuit) is used for each of the plurality of branch circuits 5 by using the measurement result (current) in the measuring device 2. Can be automatically determined. As a result, it is not necessary to add parts such as an information carrier described in Patent Document 1 to the branch breaker 62, and the type of the branch circuit 5 can be determined while suppressing an increase in the number of parts of the branch breaker 62. it can.

  In particular, when the circuit determination method is applied to the power measurement system 1, the measurement device 2 for power measurement can be used for determining the type of the branch circuit 5. Therefore, by using the configuration of the existing power measurement system 1, it is possible to determine the type of the branch circuit 5 without adding new hardware resources. And in the electric power measurement system 1, since the setting of the type (voltage classification) of the branch circuit 5 is automated, it is possible to reduce forgetting to set or mistakes in setting as compared with the case where the contractor manually sets. . Moreover, according to this circuit determination method, functions equivalent to the circuit determination system of the present embodiment can be realized without using the dedicated measuring device 2 and determination device 3.

  Further, as in the present embodiment, in the determination step, the type of the branch circuit 5 is determined based on whether or not the first power value that is the first physical quantity matches the second power value that is the second physical quantity. May be. The first power value is a power value in the first voltage line 41 (first electric wire) obtained from the first current I1 and a power value in the second voltage line 42 (second electric wire) obtained from the second current I2. The added power value. The second power value is a power value obtained by adding a multiplication value obtained by multiplying the power value of each of the plurality of branch circuits 5 obtained from the branch current by a coefficient corresponding to each of the plurality of branch circuits 5. According to this configuration, it is possible to determine the type of the branch circuit 5 only by comparing the first power value and the second power value, and it is also possible to determine a construction error of the current sensors 21 and 22. .

  Further, as in the present embodiment, in the determination step, whether or not the current waveform of the first current I1 matches the first combined waveform, and the current waveform of the second current I2 matches the second combined waveform. Depending on whether or not, the type of the branch circuit 5 may be determined. The first synthesized waveform is obtained by synthesizing the current waveforms of the branch currents I11, I12, and I15 to I18 of the two or more branch circuits 51, 52, and 55 to 58 electrically connected to the first voltage line 41. This is the waveform. The second combined waveform is a waveform obtained by combining the current waveforms of the two or more branch circuits 53 to 58 that are electrically connected to the second voltage line 42. According to this configuration, by determining the current waveform for each of the first voltage line 41 (L1) and the second voltage line 42 (L2), either the first voltage line 41 or the second voltage line 42 may be defective. It is also possible to determine whether a setting error has occurred.

  Further, as in the present embodiment, in the determination step, the type of the branch circuit 5 may be determined based on whether or not the first effective value and the second effective value match. The first effective value is an effective value obtained by adding the effective value of the first current I1 obtained from the current waveform of the first current I1 and the effective value of the second current I2 obtained from the current waveform of the second current I2. . The second effective value is an effective value obtained by adding the effective value of the branch current obtained from the first composite waveform and the execution value of the branch current obtained from the second composite waveform. According to this configuration, the effective value of the current is a physical quantity that is generally calculated, and there is an advantage that a comparison by simple addition (addition) is possible.

  In the circuit determination system of the present embodiment, the measuring device 2 measures the first current I1 flowing through the first voltage line 41, the second current I2 flowing through the second voltage line 42, and the branch current flowing through each of the plurality of branch circuits 5. Measurement is performed, and the determination device 3 determines the type of the branch circuit 5 using the measurement result. At this time, the determination device 3 determines the type of the branch circuit 5 based on whether or not the first physical quantity and the second physical quantity match. The first physical quantity is a physical quantity regarding the current or power of the first voltage line 41 and the second voltage line 42. The second physical quantity is a physical quantity regarding the current or power of the plurality of branch circuits 5.

  Therefore, in this circuit determination system, by using the measurement result (current) in the measuring device 2, which of the two types of branch circuits (first branch circuit and second branch circuit) is selected for each of the plurality of branch circuits 5. Can be automatically determined. As a result, it is not necessary to add parts such as an information carrier described in Patent Document 1 to the branch breaker 62, and the type of the branch circuit 5 can be determined while suppressing an increase in the number of parts of the branch breaker 62. There is an advantage that you can.

  Moreover, when the determination apparatus 3 has a computer (including a microcomputer) as a main component, the program recorded in the memory of the computer is a program for causing the computer used with the distribution board 6 to function as the determination apparatus 3. The determination device 3 here refers to each of the first current I1 flowing through the first voltage line 41 (first electric wire), the second current I2 flowing through the second voltage line 42 (second electric wire), and the plurality of branch circuits 5. The type of the branch circuit 5 is determined using the measurement result of the measurement device 2 that measures the branch current flowing through the. Then, the determination device 3 determines whether each of the plurality of branch circuits is the “first branch circuit” or the “second branch circuit” depending on whether or not the first physical quantity and the second physical quantity match. judge. The first physical quantity is a physical quantity regarding the current or power of the first voltage line 41 and the second voltage line 42. The second physical quantity is a physical quantity regarding the current or power of the plurality of branch circuits 5.

  According to this program, a function equivalent to that of the circuit determination system of the present embodiment can be realized without using the dedicated measuring device 2 and determination device 3, and the branch breaker 62 can be prevented from increasing the number of parts while branching. There is an advantage that the type of the circuit 5 can be determined.

  In the present embodiment, a detached house is described as an example of a customer facility. However, the present invention is not limited to this example, and the consumer facility is a house other than a detached house such as a dwelling unit of an apartment house, or an office work. It may be a non-house such as a place or a store. In the present embodiment, power consumption is described as an example of the first power value and the second power value. However, the first power value and the second power value may be power consumption amounts.

  The arrangement of the components of the power measurement system 1 in the distribution board 6 is not limited to the above-described configuration, and can be changed as appropriate. For example, all the functions of the measurement device 2, the determination device 3, the calculation device 11, the storage device 12, and the setting device 13 are integrated into one of the measurement unit 63, the setting unit 64, and the sensor units 23 and 24. It may be provided. Furthermore, at least some of the components of the power measurement system 1 may be provided outside the cabinet 60 of the distribution board 6.

2 Measuring device 3 Judging device 4 Power line 5, 51-58 Branch circuit 6 Distribution board 41 1st voltage line (1st electric wire)
42 Second voltage line (second electric wire)
43 Neutral wire (3rd electric wire)
I1 1st current I2 2nd current I11-I18 Branch current

Claims (6)

It is electrically connected to a power line having a first electric wire, a second electric wire, and a third electric wire, and is used for a distribution board that distributes power from the power line to a plurality of branch circuits,
Each of the plurality of branch circuits is electrically connected to one of the first electric wire and the second electric wire and the third electric wire, and to the first electric wire and the second electric wire. Circuit determination method for determining whether the second branch circuit is connected to the second branch circuit,
Using the measurement results of the measuring device that measures the first current flowing through the first electric wire, the second current flowing through the second electric wire, and the branch current flowing through each of the plurality of branch circuits, the first electric wire and the Depending on whether or not the first physical quantity for the current or power of the second wire matches the second physical quantity for the current or power of the plurality of branch circuits, each of the plurality of branch circuits and the first branch circuit A circuit determination method including a determination step of determining which of the second branch circuit is the second branch circuit. The first physical quantity is a first power value obtained by adding a power value of the first electric wire obtained from the first current and a power value of the second electric wire obtained from the second current,
The second physical quantity is a second power value obtained by adding a multiplication value obtained by multiplying a power value of each of the plurality of branch circuits obtained from the branch current by a coefficient corresponding to each of the plurality of branch circuits,
The circuit determination method according to claim 1, wherein in the determination step, it is determined whether or not the first power value and the second power value match. The first physical quantity is a current waveform of the first current and a current waveform of the second current,
The second physical quantity is a first combined waveform obtained by combining current waveforms of the branch currents of each of two or more branch circuits electrically connected to the first electric wire among the plurality of branch circuits, and the plurality A second synthesized waveform obtained by synthesizing a current waveform of the branch current of each of two or more branch circuits electrically connected to the second electric wire among the branch circuits of
In the determining step, it is determined whether or not the current waveform of the first current and the first combined waveform match, and whether or not the current waveform of the second current and the second combined waveform match. The circuit determination method according to claim 1, wherein: The first physical quantity is a first effective value obtained by adding an effective value of the first current obtained from the current waveform of the first current and an effective value of the second current obtained from the current waveform of the second current. And
The second physical quantity is a second effective value obtained by adding the effective value of the branch current obtained from the first composite waveform and the effective value of the branch current obtained from the second composite waveform;
4. The circuit determination method according to claim 3, wherein in the determination step, it is determined whether or not the first effective value and the second effective value match. It is electrically connected to a power line having a first electric wire, a second electric wire, and a third electric wire, and is used for a distribution board that distributes power from the power line to a plurality of branch circuits,
The plurality of branch circuits include a first branch circuit electrically connected to one of the first electric wire and the second electric wire and the third electric wire, and an electric connection to the first electric wire and the second electric wire. There are two types of second branch circuit connected to
A measuring device for measuring a first current flowing through the first electric wire, a second current flowing through the second electric wire, and a branch current flowing through each of the plurality of branch circuits;
Whether the first physical quantity for the current or power of the first electric wire and the second electric wire matches the second physical quantity for the current or electric power of the plurality of branch circuits using the measurement result of the measuring device And a determination device for determining whether each of the plurality of branch circuits is the first branch circuit or the second branch circuit. A distribution board electrically connected to a power line having a first electric wire, a second electric wire, and a third electric wire, wherein one of the first electric wire and the second electric wire and the third electric wire are electrically connected Distributes power from the power line to a plurality of branch circuits classified into two types: a connected first branch circuit and a second branch circuit electrically connected to the first electric wire and the second electric wire. The computer used with the distribution board
Using the measurement results of the measuring device that measures the first current flowing through the first electric wire, the second current flowing through the second electric wire, and the branch current flowing through each of the plurality of branch circuits, the first electric wire and the Depending on whether or not the first physical quantity for the current or power of the second wire matches the second physical quantity for the current or power of the plurality of branch circuits, each of the plurality of branch circuits and the first branch circuit The program for functioning as a determination apparatus which determines which is the said 2nd branch circuit.

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