JP2017070070A - 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. 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 current flowing through each of plural branch circuits 5. In the determination step, the type of each of the plural branch circuits 5 is determined according to which one of a first condition and a second condition is satisfied. The first condition resides in that the feature quantity of each branch current is included in only one of the first current I1 and the second current I2. The second condition resides in that the feature quantity of each branch current is included in both the first current I1 and the second current I2.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 feature amount of the branch current of each of the plurality of branch circuits is set to only one of the first current and the second current. Or both the first current and the second current are included Depending contained, characterized in that each of said plurality 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. Whether the feature quantity of the branch current of each of the plurality of branch circuits is included in only one of the first current and the second current using the measurement device that performs measurement and the measurement result of the measurement device , Included in both the first current and the second current By, characterized in that each of said plurality of branch circuits and 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. The feature value of the branch current of each of the plurality of branch circuits is included in only one of the first current and the second current using the measurement result of the measuring device that performs the first current And whether it is included in both of the second current , Each of the plurality of branch circuits to 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. It is a wave form diagram showing a current waveform when the energization state of the 2nd branch circuit changes from OFF to ON. 4A is a graph showing the strength of each first current flowing through the first wire, FIG. 4B is a graph showing the strength of each second current flowing through the second wire, and FIG. 4C is the second branch. It is a graph showing the intensity | strength for every frequency of the branch current which flows through a circuit. It is a wave form diagram showing the current waveform of the load connected to the branch circuit.

  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 (seven in this embodiment) of branch circuits 51 to 57. Therefore, the plurality of branch circuits 51 to 57 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 57 is also referred to as a “branch circuit 5” unless the branch circuits 51 to 57 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, the circuit determination method of the present embodiment determines whether each of the plurality of branch circuits 5 is the “first branch circuit” or the “second branch circuit” using the measurement result of the measurement device 2. Including a determination step. 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. . In this determination step, the type of each of the plurality of branch circuits 5 is determined depending on which of the first condition and the second condition is satisfied. The first condition is that the feature amount of each branch current of the plurality of branch circuits 5 is included in only one of the first current I1 and the second current I2. The second condition is that the feature amount of each branch current of the plurality of branch circuits 5 is included in both the first current I1 and the second current I2.

  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 the first condition or the second condition is satisfied.

  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 207 in order to measure currents at a plurality of locations. 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 according to 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 207. The plurality of current sensors 21, 22, 201 to 207 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 arithmetic device 11, the storage device 12, the setting device 13, and the current sensors 21, 22, 201 to 207) It is stored in a cabinet 60 (see FIG. 2) of the board 6 (see FIG. 2).

  A pair of (main) current sensors 21 and 22 and a plurality of (branch) current sensors 201 to 207 are electrically connected to the measuring device 2. The pair of current sensors 21 and 22 are provided in a one-to-one correspondence with the first voltage line 41 and the second voltage line 42, and the plurality of current sensors 201 to 207 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 a 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 207. Hereinafter, each of the plurality of current sensors 201 to 207 is also referred to as “current sensor 20” unless the current sensors 201 to 207 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 each type 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. To do. 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 the present embodiment, as an example, the measured value is a power consumption amount obtained by integrating power consumption for a certain time (for example, 1 minute).

  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 57, for the branch circuits 51 to 54 that are “first branch circuits”, the voltage classification of 100 [V] is stored in association with each other, and the “second branch circuit” is stored. For certain branch circuits 55 to 57, the 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, functions as the storage device 12 and the setting device 13 are provided in the setting unit 64, and functions as the arithmetic device 11 and the current sensors 201 to 207 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. Further, among the plurality of branch breakers 62, the branch breakers 62 included in the branch circuits 55 to 57 which are “second branch circuits” are connected to the conductive bar L1 and the conductive bar L2. 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 57 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 207, for example, a CT (Current Transformer) sensor, a Hall element, a magnetoresistive element such as 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 outputs the measured value (power consumption) obtained by the arithmetic unit 11 to the measuring unit 63 in addition to the branch current flowing through each of the plurality of branch circuits 5. It is configured.

  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”. . At this time, the determination device 3 determines the type of each of the plurality of branch circuits 5 depending on whether the first condition or the second condition is satisfied. The first condition is that the feature amount of each branch current of the plurality of branch circuits 5 is included in only one of the first current I1 and the second current I2. The second condition is that the feature amount of each branch current of the plurality of branch circuits 5 is included in both the first current I1 and the second current I2.

  The feature amount of the first current I1, the feature amount of the second current I2, and the feature amount of each branch current of the plurality of branch circuits 5 are the frequency spectrum of the current. Specifically, for example, for the first current I1, the determination device 3 uses the intensity for each frequency of the current flowing through the first voltage line 41 in the determination period T1 (see FIG. 3) as the characteristic amount of the first current I1. Ask. Similarly, for the second current I2, the determination device 3 determines the intensity for each frequency of the current flowing through the second voltage line 42 in the determination period T1 as a feature amount of the second current I2. Furthermore, the determination device 3 similarly determines the intensity of each branch current flowing through each of the plurality of branch circuits 5 during the determination period T1 for each branch current of each of the plurality of branch circuits 5. It is obtained as a feature value of each branch current.

  In the present embodiment, the determination device 3 sets a determination period for extracting the feature amount of the first current I1, the feature amount of the second current I2, and the feature amount of each branch current 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. That is, in the determination device 3, the determination step in the circuit determination method may be performed a plurality of times.

  For example, it is assumed that the energization state of the branch circuit 5 is changed when a device included in one branch circuit 5 among the plurality of branch circuits 51 to 57 is turned on. In this case, the branch circuit 5 whose energization state has changed is a “first branch circuit” connected to one of the first voltage line 41 and the second voltage line 42 and the neutral line 43, for example, the branch circuit 51. Suppose. At this time, due to a change in the energization state of the branch circuit 51, a change occurs in the branch current flowing through the branch circuit 51 through one of the first voltage line 41 and the second voltage line 42 and the neutral line 43. The feature amount that appears in the branch current due to this current change appears only in one of the first voltage line 41 and the second voltage line 42. That is, when the energization state changes in the “first branch circuit”, the feature value of the branch current of the branch circuit 5 is included in only one of the first current I1 and the second current I2. In other words, in the determination step, for the branch circuit 5 in which the feature amount of the branch current is included in only one of the first current I1 and the second current I2 among the plurality of branch circuits 5, “first branch circuit” Is determined.

  In contrast, it is assumed that the branch circuit 5 whose energization state has changed is a “second branch circuit” connected to the first voltage line 41 and the second voltage line 42, for example, the branch circuit 55. At this time, due to a change in the energization state of the branch circuit 55, a change occurs in the branch current flowing through the branch circuit 55 through the first voltage line 41 and the second voltage line 42. The feature amount that appears in the branch current due to this current change appears in both the first voltage line 41 and the second voltage line 42. That is, when the energization state changes in the “second branch circuit”, the feature amount of the branch current of the branch circuit 5 is included in both the first current I1 and the second current I2. In other words, in the determination step, among the plurality of branch circuits 5, the branch circuit 5 in which the feature amount of the branch current is included in both the first current I1 and the second current I2 is a “second branch circuit”. Is determined.

  The determination device 3 determines that the branch circuit 5 is “first” if the feature value of the branch current of the branch circuit 5 to be determined is included in only one of the first current I1 and the second current I2. It is determined that it is a “branch circuit”. On the other hand, the determination device 3 determines that the branch circuit 5 is the “second branch circuit” if the feature value of the branch current of the branch circuit 5 to be determined is included in both the first current I1 and the second current I2. It is determined that The determination device 3 determines that the branch circuit 5 is “first” when the feature value of the branch current of the branch circuit 5 to be determined is not included in either the first current I1 or the second current I2. It is not determined whether it is a “branch circuit” or a “second branch circuit”.

  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. 3 and 4A to 4C. In FIG. 3, the horizontal axis represents the time axis, and the current waveform of the first current I1, the second current I2, and the branch current I15 of the branch circuit 55 to be determined is represented. 4A shows the frequency spectrum (intensity for each frequency) of the first current I1 with the horizontal axis as the frequency, and FIG. 4B shows the frequency spectrum of the second current I2. Further, FIG. 4C shows a frequency spectrum of the branch current I15 of the branch circuit 55 to be determined. Here, in this embodiment, the intensity | strength for every frequency of the 1st electric current I1, the 2nd electric current I2, and the branch current I15 is calculated | required by what is called a Fast Fourier Transform (FFT). 4A to 4C, f1 is a fundamental frequency, and f3, f5, f7, and f9 are third-order, fifth-order, seventh-order, and ninth-order harmonic components, respectively.

  In the branch circuit 55 that is the “second branch circuit”, when the energization state changes from OFF to ON at time t1, a branch current I15 flows through the branch circuit 55 as shown in FIG. Accordingly, after the time t1, the first current I1 obtained by synthesizing the branch current I15 flows through the first voltage line 41 after the time t1. Also in the second voltage line 42, after the time t1, the second current I2 obtained by combining the branch current I15 flows into the second current I2 before the time t1.

  The determination apparatus 3 sets a determination period T1 (t3-t2) after the time t1, and uses the measurement result (current) of the measurement apparatus 2 in the determination period T1, and the first current I1, the second current I2, and the branch The intensity for each frequency of the current I15 is extracted. As shown in FIG. 4A, the first current I1 has third-order, fifth-order, seventh-order, and ninth-order harmonic components f3, f5, f7, and f9 in addition to the fundamental frequency f1. Yes. As shown in FIG. 4B, the second current I2 has third-order, seventh-order, and ninth-order harmonic components f3, f7, and f9 in addition to the fundamental frequency f1. As shown in FIG. 4C, the branch current I15 of the branch circuit 55 to be determined has seventh and ninth harmonic components f7 and f9 in addition to the fundamental frequency f1.

  Here, the seventh and ninth harmonic components f7 and f9 of the branch current I15 are also included in the first current I1 and the second current I2, and the first current I1, the second current I2, And the intensities of the seventh and ninth harmonic components f7 and f9 of the branch current I15 are equal. That is, in this case, the seventh-order and ninth-order harmonic components f7 and f9, which are characteristic quantities of the branch current I15, are included in both the first current I1 and the second current I2, and the determination device 3 The branch circuit 5 to be determined is determined to be the “second branch circuit”.

  When the branch circuit 51 that is the “first branch circuit” is the determination target, the feature amount of the branch current I11 is included only in the first current I1, and the determination device 3 is the determination target. It is determined that the branch circuit 51 is the “first branch circuit”.

  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 depending on whether the first condition or the second condition is satisfied. The first condition is that the feature amount of each branch current of the plurality of branch circuits 5 is included in only one of the first current I1 and the second current I2. The second condition is that the feature amount of each branch current of the plurality of branch circuits 5 is included in both the first current I1 and the second current I2.

  Therefore, in this circuit determination method, any one 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, among the plurality of branch circuits 5, the branch circuit 5 in which the feature amount of the branch current is included in only one of the first current I1 and the second current I2. The first branch circuit is preferably determined. According to this configuration, when the feature value of the branch current is included in only one of the first current I1 and the second current I2, the determination target branch circuit 5 is the “first branch circuit”. Can be specified.

  Further, in the determination step, among the plurality of branch circuits 5, the branch circuit 5 in which the feature amount of the branch current is included in both the first current I1 and the second current I2 is determined to be the second branch circuit. . According to this configuration, when the feature value of the branch current is included in both the first current I1 and the second current I2, the determination target branch circuit 5 is specified as the “second branch circuit”. be able to.

  Further, as in the present embodiment, the feature quantity of the first current I1, the feature quantity of the second current I2, and the feature quantity of the branch current are preferably current frequency spectra. According to this configuration, the type of the branch circuit 5 can be determined based on whether or not the first current I1 and the second current I2 include a frequency having the same intensity as the frequency included in the branch current.

  Moreover, it is preferable to perform the determination step in the circuit determination method a plurality of times as in this embodiment. According to this configuration, when a device (200 V device) included in the “second branch circuit” is operated, not only the magnitude of the current flowing through the branch circuit 5 but also the current waveform changes with time. Therefore, by performing the determination step a plurality of times, for example, the determination accuracy can be improved as compared with the case where the determination step is performed only when the power is turned on.

  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 depending on which of the first condition and the second condition is satisfied. The first condition is that the feature amount of each branch current of the plurality of branch circuits 5 is included in only one of the first current I1 and the second current I2. The second condition is that the feature amount of each branch current of the plurality of branch circuits 5 is included in both the first current I1 and the second current I2.

  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. it 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. The determination device 3 determines whether each of the plurality of branch circuits 5 is the “first branch circuit” or the “second branch circuit” depending on whether the first condition or the second condition is satisfied. To do. The first condition is that the feature amount of each branch current of the plurality of branch circuits 5 is included in only one of the first current I1 and the second current I2. The second condition is that the feature amount of each branch current of the plurality of branch circuits 5 is included in both the first current I1 and the second current I2.

  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. The type of the circuit 5 can be determined.

  By the way, in the above-described embodiment, the feature amount of the first current I1, the feature amount of the second current I2, and the feature amount of the branch current of the branch circuit 5 are current frequency spectrums (intensities for each frequency). Explains. On the other hand, the feature amount of the first current I1, the feature amount of the second current I2, and the feature amount of the branch current of the branch circuit 5 may be current waveforms. FIG. 5 is a waveform diagram showing a current waveform of a current flowing through a load connected to the branch circuit 5. In this case, when the determination device 3 compares the current waveform of the first current I1, the current waveform of the second current I2, and the current waveform WP1 of the branch current of the branch circuit 5, for example, the matching degree (match degree) is obtained by pattern matching. Is calculated numerically. Then, the determination device 3 determines that the current waveforms match if the matching degree is equal to or greater than the threshold value.

  As a result, if the current waveform WP1 of the branch current matches only one of the current waveform of the first current I1 and the current waveform of the second current I2, the determination device 3 determines that the branch circuit 5 to be determined is It is determined that it is a “first branch circuit”. On the other hand, if the current waveform WP1 of the branch current matches both the current waveform of the first current I1 and the current waveform of the second current I2, the determination device 3 determines that the branch circuit 5 to be determined is “second branch”. Circuit ". According to this configuration, the determination device 3 can determine the type of the branch circuit 5 based on the matching degree of the current waveforms.

  Further, as shown in FIG. 5, the feature amount of the first current I1, the feature amount of the second current I2, and the feature amount of the branch current of the branch circuit 5 are the signal width at a predetermined current value obtained from the current waveform. It may be W1, peak value P1, or the like. In these cases, the determination device 3 determines that the signal width W1 and the peak value P1, which are the characteristic quantities of the branch current of the branch circuit 5, are only one of the current waveform of the first current I1 and the current waveform of the second current I2. The type of the branch circuit 5 is determined depending on whether it is included in both or both. That is, if the signal width W1 or the peak value P1 of the branch current is included in only one of the current waveform of the first current I1 and the current waveform of the second current I2, the determination device 3 determines that the branch of the determination target It is determined that the circuit 5 is the “first branch circuit”. On the other hand, if the signal width W1 and the peak value P1 of the branch current are included in both the current waveform of the first current I1 and the current waveform of the second current I2, the determination device 3 determines that the branch circuit 5 to be determined is It is determined that it is a “second branch circuit”. According to this configuration, depending on whether or not the signal width W1 and peak value P1 of the branch current of the branch circuit 5 are included in the current waveform of the first current I1 and the current waveform of the second current I2, The type can be determined.

  Further, in the above-described embodiment, the intensities for each frequency are compared with respect to the first current I1, the second current I2, and the branch current of the branch circuit 5 to be determined. On the other hand, the difference between the intensities of adjacent frequencies among the frequencies included in the branch current is obtained, and the type of the branch circuit 5 is determined depending on whether this difference is included in the first current I1 and the second current I2. May be determined. For example, in FIG. 4A to FIG. 4C, the difference in intensity between the seventh and ninth harmonic components f7 and f9 is calculated for each of the first current I1, the second current I2, and the branch current of the branch circuit 5. Ask. If the difference in the branch current of the branch circuit 5 matches only one of the difference in the first current I1 and the difference in the second current I2, the determination device 3 determines that the branch circuit 5 to be determined is “first It is determined that it is a “branch circuit”. On the other hand, if the difference in the branch current of the branch circuit 5 matches both the difference in the first current I1 and the difference in the second current I2, the determination device 3 determines that the branch circuit 5 to be determined is “second branch”. Circuit ". Here, the difference being matched includes not only the case where the two differences completely match, but also the case where the difference between the two differences is within the threshold. According to this configuration, the determination device 3 determines whether the difference between the feature value of the first current I1, the feature value of the second current I2, and the feature value of the branch current of the branch circuit 5 is the same. Five types can be determined.

  Further, depending on whether the frequency of which the intensity exceeds the threshold among the frequencies included in the branch current of the branch circuit 5 is included in only one or both of the first current I1 and the second current I2. The type of the branch circuit 5 may be determined. For example, in FIGS. 4A to 4C, the intensity of the third, fifth, seventh, and ninth harmonic components f3, f5, f7, and f9 included in the branch current of the branch circuit 5 is a threshold value. It is assumed that the seventh harmonic component f7 exceeds. In this case, when the seventh harmonic component f7 of only one of the first current I1 and the second current I2 exceeds the threshold value, the determination device 3 determines that the determination target branch circuit 5 is “first branch”. Circuit ". On the other hand, if the seventh harmonic component f7 of both the first current I1 and the second current I2 exceeds the threshold value, the determination device 3 indicates that the determination target branch circuit 5 is the “second branch circuit”. Is determined. According to this configuration, the determination device 3 determines whether or not the first current I1 and the second current I2 include a frequency whose intensity exceeds a threshold value among the frequencies included in the branch current of the branch circuit 5. The type of the branch circuit 5 can be determined.

  By the way, although this embodiment has described a detached house as an example of a customer facility, the present invention is not limited to this example, and the consumer facility is a house other than a detached house such as each dwelling unit of an apartment house, or office work. It may be a non-house such as a place or a store.

  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 lines 5, 51 to 57 Branch circuit 6 Distribution board 41 First voltage line (first electric wire)
42 Second voltage line (second electric wire)
43 Neutral wire (3rd electric wire)
I1 1st current I2 2nd current I11-I17 Branch current

Claims (7)

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 plurality of branch circuits Depending on whether the feature quantity of each of the branch currents is included in only one of the first current and the second current or in both of the first current and the second current A circuit determination method comprising: a determination step of determining whether each of the branch circuits is the first branch circuit or the second branch circuit.   In the determination step, among the plurality of branch circuits, a branch circuit in which the feature amount of the branch current is included in only one of the first current and the second current is the first branch circuit. The circuit determination method according to claim 1, wherein:   In the determining step, among the plurality of branch circuits, a branch circuit in which the feature amount of the branch current is included in both the first current and the second current is determined to be the second branch circuit. The circuit determination method according to claim 1.   4. The circuit according to claim 1, wherein the feature quantity of the first current, the feature quantity of the second current, and the feature quantity of the branch current are a frequency spectrum of a current. 5. Judgment method.   The circuit determination method according to claim 1, wherein the determination step is performed a plurality of times. 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 feature value of the branch current of each of the plurality of branch circuits is included in only one of the first current and the second current using the measurement result of the measurement device, or the first current And a determination device for determining whether each of the plurality of branch circuits is the first branch circuit or the second branch circuit depending on whether the branch current is included in both of the second current and the second current. A circuit judgment system. 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 plurality of branch circuits Depending on whether the feature quantity of each of the branch currents is included in only one of the first current and the second current or in both of the first current and the second current A program for causing each of the branch circuits to function as a determination device that determines which of the first branch circuit and the second branch circuit is.

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