JP2018207636A - Determination system, distribution board, determination method, and program - Google Patents

Abstract

To easily determine a construction state of a split type current sensor.SOLUTION: A determination system 2 comprises: a plurality of current sensors 20, 21, and 22; and a determination device 11. The plurality of current sensors 20, 21, and 22 include at least one split type current sensors 21 and 22 each having a split structure, and measures a current flowing in a plurality of measurement points in one cable way. The determination device 11 determines a construction state of the split type current sensors 21 and 22 in accordance with whether there is a correlation between two or more currents or two or more power obtained by two or more currents. The two or more currents are measured by two or more current sensors including the split type current sensors 21 and 22 among of the plurality of current sensors 20, 21, and 22.SELECTED DRAWING: Figure 1

Description

  The present invention generally relates to a discrimination system, a distribution board, a discrimination method, and a program, and more specifically, a discrimination system, a distribution board, a discrimination method for discriminating a construction state of a split-type current sensor having a split structure, And programs.

  Patent Document 1 describes a split-type current transformer for measuring a current flowing through an electric wire to be measured. The split-type current transformer described in Patent Literature 1 includes a magnetic circuit assembly, a nonmagnetic container, a band-shaped fixing body, a screw, and a nut. The magnetic circuit assembly includes a magnetic body divided into two parts and two windings wound around the two magnetic bodies. The split-type current transformer described in Patent Document 1 is attached so that the magnetic circuit assembly is housed in a non-magnetic container with the cut surfaces of the two magnetic bodies being in contact with each other, and the non-magnetic container is covered. It is assembled by fastening with screws and nuts at the opening of the belt-like fixed body.

JP 2001-13171 A

  In the split-type current transformer (split-type current sensor) described in Patent Document 1, if the fastening with screws and nuts is insufficient, a gap is generated between two magnetic bodies, and the current flowing through the wire to be measured is correctly measured. It may not be possible. Therefore, in the split-type current transformer described in Patent Document 1, the installer must visually check the fastening state with the screw and the nut, or determine the construction state from the measurement result, which is easily determined. A method was desired.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a determination system, a distribution board, a determination method, and a program that can easily determine the construction state of a divided current sensor.

  A discrimination system according to an aspect of the present invention includes a plurality of current sensors and a discrimination device. The plurality of current sensors include at least one split-type current sensor having a split structure, and measure current flowing through a plurality of measurement points in one electric circuit. The discriminating device discriminates the construction state of the split-type current sensor according to whether or not there is a correlation between two or more currents or two or more electric powers obtained from the two or more currents. . The two or more currents are measured by two or more current sensors including the split current sensor among the plurality of current sensors.

  The distribution board which concerns on 1 aspect of this invention is provided with the said discrimination | determination system and the cabinet which accommodates the said discrimination | determination system.

  The determination method according to an aspect of the present invention includes a determination step. The determining step includes at least one split current sensor having a split structure depending on whether there is a correlation between two or more currents or between two or more powers obtained from the two or more currents. It is a step which discriminate | determines the construction state of. The two or more currents include the split-type current sensor, and two or more current sensors including the split-type current sensor among a plurality of current sensors that measure current flowing through a plurality of measurement points in one electric circuit. Measured at.

  A program according to one embodiment of the present invention causes a computer to execute a determination step. The determining step includes at least one split current sensor having a split structure depending on whether there is a correlation between two or more currents or between two or more powers obtained from the two or more currents. It is a step which discriminate | determines the construction state of. The two or more currents include the split-type current sensor, and two or more current sensors including the split-type current sensor among a plurality of current sensors that measure current flowing through a plurality of measurement points in one electric circuit. Measured at.

  The present invention has an advantage that the construction state of the split-type current sensor can be easily determined.

FIG. 1 is a block diagram showing a configuration of a discrimination system according to an embodiment of the present invention. FIG. 2 is a block diagram showing a configuration of a distribution board according to an embodiment of the present invention. FIG. 3A is a waveform diagram illustrating a current waveform for explaining the operation of the discrimination system according to the embodiment of the present invention, and is a waveform diagram in a case where a divided current sensor is normally constructed. FIG. 3B is a waveform diagram when the split-type current sensor is not normally constructed. 4A to 4C are graphs for explaining the operation of the discrimination system according to the first modification of the embodiment of the present invention, and are graphs when the divided current sensor is normally constructed. . FIG. 5A to FIG. 5C are graphs for explaining the operation of the discrimination system described above, and are graphs when the split current sensor is not normally constructed.

(1) Overview Hereinafter, an overview of the discrimination system according to the present embodiment will be described.

  The discrimination system according to the present embodiment is used for, for example, a distribution board, and discriminates a construction state of a split current sensor based on measurement results of a plurality of current sensors including at least one split current sensor having a split structure. It is a system to do.

  For example, in the case of a single-phase three-wire power distribution system, the distribution board includes a first voltage line (L1) 41, a second voltage line (L2) 42, and a neutral line (N) 43, as shown in FIG. 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 first voltage line 41 and the neutral line 43 are electrically connected to the first voltage system 81, the second voltage line 42 and the neutral line 43 are electrically connected to the second voltage system 82, The first voltage line 41 and the second voltage line 42 are electrically connected to the third voltage system 83. That is, the distribution board is supplied with power from the first voltage system 81, the second voltage system 82, and the third voltage system 83 via the power line 4. In other words, the distribution board has three electric circuits to which electric power is supplied from the first voltage system 81, the second voltage system 82, and the third voltage system 83, respectively. These three electric circuits form a closed loop with respect to any of the first voltage system 81, the second voltage system 82, and the third voltage system 83, respectively.

  The distribution board distributes AC power from the first voltage system 81, the second voltage system 82, and the third voltage system 83 to a plurality (six in FIG. 1) of branch circuits 51 to 56. In FIG. 1, the branch circuits 51 and 52 are electrically connected to the first voltage line 41 and the neutral line 43, and the branch circuits 53 and 54 are electrically connected to the second voltage line 42 and the neutral line 43. The branch circuits 55 and 56 are electrically connected to the first voltage line 41 and the second voltage line 42. That is, the branch circuits 51 and 52 are supplied with power from the first voltage system 81, the branch circuits 53 and 54 are supplied with power from the second voltage system 82, and the branch circuits 55 and 56 are supplied with power from the third voltage system 83. Supplied.

  In the following, each of the plurality of branch circuits 51 to 56 is also referred to as a “branch circuit 5” unless the plurality of branch circuits 51 to 56 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 branch circuits 51 to 54 have 100 [V]. ] Is applied, and 200 [V] is applied to the branch circuits 55 and 56.

  By the way, in such a distribution board, the electric current (main current) which flows through the 1st voltage line 41 and the 2nd voltage line 42 electrically connected to the primary side terminal of main trunk breaker 61 (refer to Drawing 2) is measured. Therefore, current sensors are attached to the first voltage line 41 and the second voltage line 42. In this case, since the installer of the distribution board attaches the current sensor to the first voltage line 41 and the second voltage line 42 after being connected to the primary side terminal of the main breaker 61, these currents A split-type current sensor is used as the sensor. The “divided current sensor” here has two divided structures that can be divided from each other, and the first voltage line 41 or the second voltage line is formed in a through hole formed by combining the two divided structures with each other. 42 is a current sensor that is installed in a state in which 42 is passed. In this split-type current sensor, when the two split structures are not properly combined, in other words, when the two split structures are not sufficiently fitted, the inductance changes due to the gap between the split structures, and the correct measurement result May not be obtained. Therefore, in order to obtain correct measurement results, it is necessary to check the construction status of the split-type current sensor. However, with conventional split-type current transformers, it is necessary to check with the naked eye or to distinguish from the measurement results. However, a method for easily discriminating the construction state of the split-type current sensor has been desired.

  The discrimination system according to the present embodiment has the following configuration so that the construction state of the split-type current sensor can be easily discriminated.

  As shown in FIG. 1, the determination system 2 according to the present embodiment includes a plurality of current sensors 20, 21, and 22 and a determination device 11. The plurality of current sensors 20, 21, 22 include at least one split-type current sensor 21, 22 having a split structure. The plurality of current sensors 20, 21, and 22 measure currents that flow through a plurality of measurement points (P 1, P 2, P 15, P 16) in one electric circuit (for example, the third voltage system 83). The discriminating device 11 discriminates the construction state of the divided current sensors 21 and 22 depending on whether or not there is a correlation between two or more currents or two or more electric powers obtained from two or more currents. To do. Two or more currents are measured by two or more current sensors including the split-type current sensors 21 and 22 among the plurality of current sensors 20, 21 and 22.

  According to this configuration, the discriminating device 11 is provided with two or more currents between two or more currents measured by two or more current sensors including the split-type current sensors 21 and 22, or two or more currents. The construction state of the split-type current sensors 21 and 22 is determined based on whether or not there is a correlation between the electric powers. Therefore, unlike the conventional split-type current transformer, the installer does not have to visually confirm the fastening state with the screw and the nut or discriminate the construction state from the measurement result. The construction state of the split-type current sensors 21 and 22 can be easily determined.

(2) Details Hereinafter, details of the discrimination system according to the present embodiment will be described.

  In the present embodiment, the discrimination system is applied to a power measurement system for measuring at least one of power consumption and power consumption in a customer facility, and is used to discriminate the construction state of the split current sensor. 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.

(2.1) Basic Configuration First, the basic configuration of the power measurement system 1 to which the discrimination system 2 is applied will be described with reference to FIG.

  As shown in FIG. 1, the power measurement system 1 according to the present embodiment further includes a measurement device 12, a calculation device 13, a storage device 14, and a display device 15 in addition to the determination device 11. Furthermore, the power measurement system 1 includes a plurality of current sensors 21, 22, 201 to 206 in order to measure currents flowing through the plurality of measurement points P1, P2, P11 to P16. The measuring device 12 measures the current flowing through the plurality of measurement points P1, P2, P11 to P16 from the outputs of the plurality of current sensors 21, 22, 201 to 206. The computing device 13 computes at least one of power consumption and power consumption based on the measurement result of the measuring device 12. The storage device 14 stores information indicating whether the voltage applied to each of the plurality of branch circuits 5 is 100 [V] or 200 V [V] (hereinafter referred to as “voltage classification”). The display device 15 displays the calculation result of the calculation device 13, the determination result of the determination device 11, and the like.

  Here, the components of the power measurement system 1 are the same as the components of the determination system 2 except for the arithmetic device 13, the storage device 14, and the display device 15. That is, the discrimination system 2 according to the present embodiment includes a discrimination device 11, a measurement device 12, and a plurality of current sensors 21, 22, 201 to 206. Note that the plurality of current sensors 21, 22, 201 to 206 may be included in the measuring device 12.

  In the present embodiment, the components of the power measurement system 1 (the determination device 11, the measurement device 12, the calculation device 13, the storage device 14, the display device 15, and the current sensors 21, 22, 201 to 206) are divided into distribution boards. 6 (see FIG. 2) is housed in a cabinet 60 (see FIG. 2).

  A pair of (main) current sensors 21 and 22 and a plurality of (branch) current sensors 201 to 206 are electrically connected to the measuring device 12. The pair of current sensors 21 and 22 are provided corresponding to the first voltage line 41 and the second voltage line 42 in a one-to-one correspondence, and the plurality of current sensors 201 to 206 correspond to the plurality of branch circuits 5 in a one-to-one correspondence. Is provided. As a result, the measuring device 12 can measure the first main current (main current) I1 that flows through the first voltage line 41 from the output of the current sensor 21, and the second mains current that flows through the second voltage line 42 from the output of the current sensor 22. 2 Main trunk current (main trunk current) I2 can be measured. Further, the measuring device 12 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 206. Hereinafter, each of the plurality of current sensors 201 to 206 is also referred to as a “current sensor 20” when the plurality of current sensors 201 to 206 for measuring the branch current are not 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”.

  Also, as described above, the pair of current sensors 21 and 22 are attached to the first voltage line 41 and the second voltage line 42 after being connected to the primary side terminal of the main breaker 61 (described later). Therefore, the pair of current sensors 21 and 22 is preferably a split-type current sensor having a split structure (hereinafter also referred to as “split-type current sensors 21 and 22”). In the present embodiment, the split-type current sensor 21 that measures the first main current I1 that flows through the first voltage line 41 is the first split-type current sensor, and measures the second main current I2 that flows through the second voltage line 42. The divided current sensor 22 is a second divided current sensor. Hereinafter, a case where the divided structure is a core that can be divided (hereinafter referred to as “divided core”) will be described as an example.

  The arithmetic device 13 is electrically connected to the measuring device 12 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 12. 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 13 monitors the line voltage of the power line (first voltage line 41, second voltage line 42, and neutral line 43) 4. The computing device 13 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 13, 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 14 stores the voltage classification (information indicating whether the applied voltage is 100 [V] or 200 [V]) of each of the plurality of branch circuits 5. In other words, the storage device 14 stores which of the plurality of branch circuits 5 is connected to the first voltage system 81, the second voltage system 82, and the third voltage system 83. In the present embodiment, the branch circuits 51 and 52 electrically connected to the first voltage system 81 and the branch circuits 53 and 54 electrically connected to the second voltage system 82 are 100 [V]. Are stored in the storage device 14 in association with each other. Further, the branch circuits 55 and 56 electrically connected to the third voltage system 83 are stored in the storage device 14 in association with the voltage classification of 200 [V]. In the following description, it is assumed that a correct voltage classification is associated with each of the plurality of branch circuits 5.

  The discriminating device 11 is electrically connected to the measuring device 12, and using the measurement result of the measuring device 12, the construction state of the split current sensors 21 and 22, in other words, the faulty construction of the split current sensors 21 and 22. Determine if there is any. Examples of defective construction of the split-type current sensors 21 and 22 include, for example, faulty fitting of the split core, cracking of the split core, faulty insulation of the split core, and disconnection of the wires from the split-type current sensors 21 and 22 to the measuring device 12. Is assumed. The measurement result of the measurement device 12 here is a measurement result of each current (the first main current I1, the second main current I2, and each branch current) in the measurement device 12, for example, an effective value or a current waveform. It is.

  Here, the discrimination device 11 is configured by a microcomputer having a processor and a memory. That is, the determination device 11 is realized by a computer system having a processor and a memory. The computer system functions as the determination device 11 by the processor executing an appropriate program. The program may be recorded in advance in a memory, or may be provided by being recorded through a telecommunication line such as the Internet or a non-transitory recording medium such as a memory card. Further, the program may be recorded in the storage device 14 in advance. The operation of the discrimination device 11 will be described in detail in the column “(3) Discrimination operation”.

  In this embodiment, the discriminating device 11 discriminates the construction state of the divided current sensors 21 and 22 at least when the discriminating system (power measurement system 1) 2 is started, that is, when the power is turned on. Further, since the discriminating device 11 may cause a faulty construction of the split-type current sensors 21, 22 due to, for example, stress from the electric wire, vibration, etc., the construction status of the split-type current sensors 21, 22 is periodically checked. It is configured to determine. Thereby, the discrimination device 11 can reduce the processing load (calculation load) related to discrimination as compared with the case where the construction state of the divided current sensors 21 and 22 is always discriminated.

  The display device 15 is, for example, a liquid crystal display (LCD). The display device 15 displays, for example, the measurement result of the measurement device 12, the calculation result (measurement value) of the calculation device 13, the determination result of the determination device 11, and the like. Therefore, the installer can discriminate the construction state of the divided current sensors 21 and 22 by looking at the discrimination result of the discrimination device 11 displayed on the display device 15.

(2.2) Distribution board Next, the structure of the distribution board 6 is demonstrated.

  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. Furthermore, the distribution board 6 includes a measurement unit 63, 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 determination device 11, the measurement device 12, and the storage device 14 among the components of the power measurement system 1 are provided in the measurement unit 63. Similarly, the functions as the arithmetic unit 13 and the current sensors 201 to 206 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 (L1) 41, the second voltage line (L2) 42, and the neutral line (N) 43 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 breaker 62 included in the branch circuits 51 to 54 is connected to one of the conductive bars L1 and L2 and the N conductive bar. Of the plurality of branch breakers 62, the branch breakers 62 included in the branch circuits 55 and 56 are connected to the L1 conductive bar and the L2 conductive bar. Accordingly, each of the branch circuits 51 to 54 is electrically connected to one of the first voltage line (L1) 41 and the second voltage line (L2) 42 and the neutral line (N) 43. Become. The branch circuits 55 and 56 are electrically connected to the first voltage line (L1) 41 and the second voltage line (L2) 42.

  Here, the branch breaker 62 for 100 [V], that is, the branch breaker 62 of the branch circuit 5 whose voltage classification is set to 100 [V] is the first voltage line in the state where it is attached to the upper stage of the conductive bar. (L1) 41 and neutral wire (N) 43 are electrically connected. 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 (L2) 42 and the neutral line (N) 43. Further, the branch breaker 62 for 200 V, that is, the branch breaker 62 of the branch circuit 5 in which the voltage classification is set to 200 [V], is connected to the first voltage line (L1) 41 regardless of the upper and lower stages of the conductive bar. The second voltage line (L2) 42 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 and 22, for example, a CT (Current Transformer) sensor, a Hall element, a magnetoresistive element such as a GMR (Giant Magnetic Resistances) element, or the like is used. As the current sensors 201 to 206, for example, a CT sensor, a magnetoresistive element such as a Hall element or a GMR element, a shunt resistor, 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 (split-type 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 12 provided in the measuring unit 63, the first main 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 can be measured from the output of the current sensor 22. The flowing second main 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 12 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 device 13 is provided in the pair of sensor units 23 and 24. For this reason, the pair of sensor units 23 and 24 outputs the measured value (power consumption) obtained by the arithmetic device 13 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.

(3) Discriminating Operation Next, the operation (discriminating operation) of the discriminating apparatus 11 in the power measurement system 1 (discriminating system 2) according to the present embodiment will be described with reference to FIGS. 3A and 3B. In the present embodiment, as an example, an electric circuit to which electric power from the third voltage system 83 is supplied among three electric circuits will be described. In the following description, it is assumed that the branch current I16 flowing through the branch circuit 56 electrically connected to the third voltage system 83 is constant. In this case, a current sensor 21 that measures the first main current I1 that flows through the first voltage line 41 at the measurement point P1, and a current sensor 22 that measures the second main current I2 that flows through the second voltage line 42 at the measurement point P2. Is a split-type current sensor. The determination device 11 has a correlation between the first main current I1 and the second main current I2 measured by the split current sensors 21 and 22, and the branch current I15 measured by the current sensor 205. Whether or not the split-type current sensors 21 and 22 are installed is determined depending on whether or not.

  Here, “correlation” generally means that two or more elements are closely related. In the present embodiment, the effective value Ie of the first main current I1 (or the second main current I2) is calculated. There is a correlation when the amount of change is equal to the amount of change in the effective value Ie of the branch current I15. That is, in the present embodiment, the change in current measured by the current sensors 21, 22, 205 is a change in the effective value of the current. In addition, “equal” here includes not only the case where the two match completely, but also the case where the difference between the two is smaller than a predetermined value.

  3A and 3B show the first main current I1 flowing through the first voltage line 41, the second main current I2 flowing through the second voltage line 42, and the branch current I15 flowing through the branch circuit 55, with the horizontal axis as the time axis. It is a wave form diagram showing change of each effective value Ie. 3A and 3B, the solid line a1 represents the first main trunk current I1, the broken line a2 represents the second main trunk current I2, and the alternate long and short dash line a3 represents the branch current I15. 3A shows a case where the split-type current sensors 21 and 22 are normally constructed (no construction failure), and FIG. 3B shows that the split-type current sensor 22 is not normally constructed (the construction failure is not present). Represents the case.

  At time t1 in FIGS. 3A and 3B, the effective value Ie of the first main current I1 is large, but the effective value Ie of the second main current I2 and the effective value Ie of the branch current I15 are not changed. This is because, for example, the effective value Ie of the first main current I1 is changed by the change of the branch current I11 flowing through the branch circuit 51 that is electrically connected to the first voltage system 81 which is an electric path different from the third voltage system 83. It is assumed that it is getting bigger. At this time, the discriminating device 11 does not discriminate the construction state of the divided current sensors 21 and 22 because the branch current I15 flowing through the branch circuit 55 has not changed.

  In FIG. 3A, the effective value Ie of the branch current I15 flowing through the branch circuit 55 decreases during a certain period T1 from time t2 to time t3. Further, in FIG. 3A, the effective value Ie of each of the first main current I1 and the second main current I2 is also decreased in the certain period T1. Here, since the split-type current sensors 21 and 22 are normally constructed, the amount of change in the effective value Ie of each of the first main current I1 and the second main current I2 and the effective value Ie of the branch current I15. It becomes equal to the amount of change (see FIG. 3A). Since the change amount of the effective value Ie of each of the first main current I1 and the second main current I2 is equal to the change amount of the effective value Ie of the branch current I15, the discriminating apparatus 11 has the first main current I1 and the second main current I1. It is determined that there is a correlation between each of the two main currents I2 and the branch current I15. In the discriminating device 11, since there is a correlation between each of the first main current I1 and the second main current I2 and the branch current I15, the divided current sensors 21 and 22 are normally applied (construction) It is determined that there is no defect.

  In FIG. 3B, the effective value Ie of the branch current I15 flowing through the branch circuit 55 decreases during a certain period T1 from time t2 to time t3. Further, in FIG. 3B, the effective value Ie of each of the first main current I1 and the second main current I2 is also decreased in the certain period T1. Here, since the split-type current sensor 22 is not normally constructed, the second main current I2 flowing through the second voltage line 42 cannot be accurately measured. Therefore, although the amount of change in the effective value Ie of the first main current I1 is equal to the amount of change in the effective value Ie of the branch current I15, the amount of change in the effective value Ie of the second main current I2 and the effective value of the branch current I15. It is not equal to the amount of change in Ie (see FIG. 3B). Since the change amount of the effective value Ie of the first main current I1 is equal to the change amount of the effective value Ie of the branch current I15, the determination device 11 has a correlation between the first main current I1 and the branch current I15. Determine that there is. Further, since the change amount of the effective value Ie of the second main current I2 and the change amount of the effective value Ie of the branch current I15 are different (not equal), the determination device 11 branches from the second main current I2. It is determined that there is no correlation with the current I15. Then, the determination device 11 determines that the split current sensor 21 is normally applied (no application failure) because there is a correlation between the first main current I1 and the branch current I15. Moreover, since there is no correlation between the 2nd main current I2 and the branch current I15, the discrimination | determination apparatus 11 discriminate | determines that the division | segmentation type current sensor 22 is not normally constructed | assembled (there is a construction defect). The determination result of the determination device 11 is displayed on the display device 15.

  According to the discrimination system 2 according to the present embodiment, the discrimination device 11 determines whether the first main current I1 (or the second main current I2) and the branch current I15 have a correlation. The construction state of 21 (or split type sensor 22) is discriminated. Then, the installer of the distribution board 6 constructs the split-type current sensor 21 (or the split-type current sensor 22) based on the determination result of the determination device 11 (the display content when displayed on the display device 15). The state can be determined. That is, according to the discriminating system 2 according to the present embodiment, the installer does not have to visually confirm the construction state or discriminate the construction state from the measurement results as in the conventional split-type current transformer. Well, the construction state of the split-type current sensors 21 and 22 can be easily determined.

(4) Discriminating method, program By adopting the following discriminating method, for example, using a personal digital assistant (PDA) such as a tablet terminal or a smartphone, or a personal computer without using the dedicated discriminating device 11. A function equivalent to that of the discrimination system 2 according to the present embodiment can be realized.

  That is, the determination method includes a determination step. The determination step includes at least one split-type current sensor 21 having a split structure, depending on whether there is a correlation between two or more currents or between two or more powers obtained from two or more currents. 22 is a step of determining the construction state. The split-type current sensors 21 and 22 include a plurality of current sensors 20, 21, and 21 that measure current flowing through a plurality of measurement points (P 1, P 2, P 15, P 16) in one electric circuit (for example, the third voltage system 83). 22. Two or more currents are measured by two or more current sensors including the split-type current sensors 21 and 22 among the plurality of current sensors 20, 21 and 22.

  According to this determination method, the function equivalent to that of the determination system 2 according to the present embodiment can be realized without using the dedicated determination device 11, and the construction state of the divided current sensors 21 and 22 can be easily determined. There is an advantage that you can.

  Moreover, when the determination apparatus 11 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 to execute a determination step. The determination step includes at least one split-type current sensor 21 having a split structure, depending on whether there is a correlation between two or more currents or between two or more powers obtained from two or more currents. 22 is a step of determining the construction state. The split-type current sensors 21 and 22 include a plurality of current sensors 20, 21, and 21 that measure current flowing through a plurality of measurement points (P 1, P 2, P 15, P 16) in one electric circuit (for example, the third voltage system 83). 22. Two or more currents are measured by two or more current sensors including the split-type current sensors 21 and 22 among the plurality of current sensors 20, 21 and 22.

  According to this program, the function equivalent to that of the discrimination system 2 of the present embodiment can be realized without using the dedicated discrimination device 11, and the construction state of the divided current sensors 21 and 22 can be easily discriminated. There is an advantage that.

(5) Modifications The above-described embodiment is merely one of various embodiments of the present invention. The above-described embodiment can be variously modified according to the design or the like as long as the object of the present invention can be achieved. Hereinafter, modifications of the above-described embodiment will be listed. The modifications described below can be applied in appropriate combinations.

(5.1) First Modification In the above-described embodiment, the determination device 11 determines whether or not there is a correlation between the change amounts of the effective values Ie of the first main current I1, the second main current I2, and the branch current I15. The case where the construction state of the split-type current sensors 21 and 22 is discriminated is described as an example. On the other hand, changes in the first main current I1, the second main current I2, and the branch current I15 are not limited to changes in the effective value Ie, but may be changes in frequency components included in the current, for example. That is, in the first modification, the change in current measured by the current sensors 21, 22, 205 is a change in the frequency component included in the current. Hereinafter, operation | movement of the discrimination | determination apparatus 11 which concerns on a 1st modification is demonstrated with reference to FIG. 4A-FIG. 5C.

  4A and 5A, the frequency spectrum (intensity for each frequency) of the first main current I1 is shown with the horizontal axis as the frequency, and in FIG. 4B and FIG. 5B, the frequency spectrum of the second main current I2 is shown. Represents. Furthermore, in FIG. 4C and FIG. 5C, the frequency spectrum of the branch current I15 is represented. Here, in this modification, the intensities for each frequency of the first main current I1, the second main current I2, and the branch current I15 are obtained by so-called Fast Fourier Transform (FFT). 4A to 5C, f1 is a fundamental frequency, and f3, f5, f7, and f9 are third-order, fifth-order, seventh-order, and ninth-order harmonic components, respectively.

  First, a case where the divided current sensors 21 and 22 are normally constructed will be described with reference to FIGS. 4A to 4C. The branch current I15 measured by the current sensor 205 includes seventh-order and ninth-order harmonic components f7 and f9 as shown in FIG. 4C. The first main current I1 measured by the split current sensor 21 includes seventh and ninth harmonic components f7 and f9 having the same strength as the branch current I15, as shown in FIG. 4A. ing. In addition, as shown in FIG. 4B, the seventh and ninth harmonic components f7 and f9 having the same strength as the branch current I15 are also present in the second main current I2 measured by the split-type current sensor 22. include. The discriminating device 11 includes the first main trunk current I1 and the second main trunk current I2 because the seventh and ninth harmonic components f7 and f9 having the same strength as the branch current I15 are included in the first main trunk current I1. It is determined that there is a correlation between each of the current I1 and the second main current I2 and the branch current I15. In the discriminating device 11, since there is a correlation between each of the first main current I1 and the second main current I2 and the branch current I15, the divided current sensors 21 and 22 are normally applied (construction) It is determined that there is no defect.

  Next, the case where the split-type current sensor 22 is not normally constructed (there is a construction failure) will be described with reference to FIGS. 5A to 5C. The branch current I15 measured by the current sensor 205 includes seventh-order and ninth-order harmonic components f7 and f9 as shown in FIG. 5C. The first main current I1 measured by the split current sensor 21 includes seventh and ninth harmonic components f7 and f9 having the same strength as the branch current I15, as shown in FIG. 5A. ing. On the other hand, the second main current I2 measured by the split current sensor 22 includes seventh and ninth harmonic components f7 and f9 having the same strength as the branch current I15, as shown in FIG. 5B. Not included. The discriminating device 11 includes the first main current I1 and the branch current I15 because the first main current I1 includes the seventh and ninth harmonic components f7 and f9 having the same strength as the branch current I15. It is determined that there is a correlation with. Further, the discriminating device 11 branches from the second main current I2 because the seventh and ninth harmonic components f7 and f9 having the same strength as the branch current I15 are not included in the second main current I2. It is determined that there is no correlation with the current I15. Then, the determination device 11 determines that the divided current sensor 21 is normally applied because there is a correlation between the first main current I1 and the branch current I15. Further, the determination device 11 determines that the divided current sensor 22 is not normally applied because there is no correlation between the second main current I2 and the branch current I15.

  Thus, according to the first modification, whether or not a frequency component having the same strength as the frequency component included in the branch current I15 measured by the current sensor 205 that is normally applied is included. Thus, it is possible to determine the construction state of the divided current sensors 21 and 22. The installer can easily discriminate the construction state of the divided current sensors 21 and 22 from the discrimination result of the discrimination device 11.

(5.2) Other Modification Examples Other modification examples are listed below.

  In the above-described embodiment, the case where the AC power from the system power supply 7 is distributed to the plurality of branch circuits 5 has been described as an example. However, the power distributed to the plurality of branch circuits 5 is not limited to AC power, but is DC power. There may be. In the above-described embodiment, the case where the power distribution system is a single-phase three-wire system has been described as an example. However, the power distribution system is not limited to a single-phase three-wire system, and may be, for example, a single-phase two-wire system. However, it may be a three-phase three-wire system.

  In the above-described embodiment, the case where the customer facility is a detached house has been described as an example. However, the consumer facility is not limited to a detached house, and may be each dwelling unit of an apartment house such as a condominium, an office building, It may be non-residential such as a factory.

  In the above-described embodiment, the discriminating device 11 determines whether the divided current sensor 21, the first main current I <b> 1, the second main current I <b> 2, and the branch current I <b> 15 are correlated with the amount of change in the effective value Ie. 22 construction conditions were determined. In the first modification, the determination device 11 determines whether the frequency component having the same strength as the frequency component included in the branch current I15 is included in each of the first main current I1 and the second main current I2. Thus, the construction state of the split-type current sensors 21 and 22 was determined. On the other hand, the discriminator 11 determines whether the current waveform of each of the first main current I1 and the second main current I2 matches the current waveform of the branch current I15, for example. 22 may be comprised so that the construction state may be discriminate | determined.

  In this case, the discrimination device 11 compares the current waveforms of the first main current I1 and the second main current I2 with the current waveform of the branch current I15. Is calculated numerically. If the degree of coincidence between the current waveform of each of the first main current I1 and the second main current I2 and the current waveform of the branch current I15 is equal to or greater than a threshold value, the determination device 11 determines whether the first main current I1 and the second main current I2 It is determined that each current waveform of the main current I2 matches the current waveform of the branch current I15.

  The discriminating device 11 discriminates that there is a correlation between the current waveform of each of the first main current I1 and the second main current I2 and the current waveform of the branch current I15. If not, it is determined that there is no correlation between the two. If there is a correlation between each of the first main current I1 and the second main current I2 and the branch current I15, the determination device 11 determines that the divided current sensors 21 and 22 are normally applied. . Further, the determination device 11 determines that the divided current sensors 21 and 22 are not normally applied unless there is a correlation between each of the first main current I1 and the second main current I2 and the branch current I15. .

  Thus, when determining whether or not there is a correlation between each of the first main current I1 and the second main current I2 and the branch current I15, a change in the current waveform may be used as a change in current. it can.

  Further, as described above, the discriminating device 11 may be configured not to compare the current waveforms but to compare the peak values of the current waveforms, and the characteristics of the current waveforms other than the peak values. It may be configured to compare quantities.

  Further, it is assumed that branch currents flow at the same timing in a plurality of branch circuits electrically connected to one electric circuit. In this case, since the current waveform of the main current is a composite waveform obtained by synthesizing the current waveforms of the plurality of branch circuits, the current waveform of any one of the plurality of branch circuits, the current waveform of the main current, There is a possibility that it cannot be correctly identified even if they are compared. In this case, the current waveform of the main current and the current waveform of the branch circuit can be compared by separating the current waveform of the main current into current waveforms for each branch circuit, for example, by disaggregation.

  In addition, when determining the correlation between the main current and the branch current based on the current waveform of each branch circuit separated from the main current waveform, it may be compared by a change in effective value or a change in frequency component Or may be compared by changing the current waveform.

  In the above-described embodiment and the first modification, the determination device 11 includes the first main current I1, the second main current I2, and the branch current that flow through the electric circuit supplied with power from the third voltage system 83 among the three electric circuits. Based on I15, the construction state of the split-type current sensors 21, 22 was determined. On the other hand, the discriminating apparatus 11 determines whether or not there is a correlation between the first main current I1 and the branch current I11 that flow through the electric circuit supplied with power from the first voltage system 81 for the divided current sensor 21. Depending on the situation, the construction state of the split-type current sensor 21 may be determined. Further, the discriminating device 11 determines whether or not the divided current sensor 22 has a correlation between the second main current I2 and the branch current I13 flowing through the electric circuit supplied with power from the second voltage system 82. The construction state of the split current sensor 22 may be determined.

  In the above-described embodiment and the first modification, the determination device 11 determines whether or not each of the first main current I1 and the second main current I2 and the branch current I15 have a correlation, based on whether or not there is a correlation. , 22 was determined. On the other hand, the discriminating device 11 is configured to discriminate the construction state of the divided current sensors 21 and 22 depending on whether or not there is a correlation between the first main current I1 and the second main current I2. It may be. However, in this case, it is assumed that either one of the divided current sensors 21 and 22 is normally constructed.

  In the first modification described above, the determination device 11 determines whether or not the frequency component having the same magnitude as the branch current I15 is included in each of the first main current I1 and the second main current I2. The construction state of 21 and 22 was discriminated. On the other hand, the discriminating device 11 divides depending on whether or not the change amount of the specific frequency component in a certain period is the same in each of the first main current I1 and the second main current I2 and the branch current I15. You may be comprised so that the construction state of the shape current sensors 21 and 22 may be discriminate | determined.

  Further, the discriminating device 11 determines whether the component ratio of the plurality of frequency components including the fundamental frequency is the same for each of the first main current I1 and the second main current I2 and the branch current I15. You may be comprised so that the construction state of the sensors 21 and 22 may be discriminate | determined.

  In the above-described embodiment, the case where the branch current I16 flowing through the branch circuit 56 is constant in the circuit supplied with power from the third voltage system 83 has been described as an example. However, the branch current I16 may vary. . In this case, the discriminator 11 compares the change in the effective value Ie of each of the first main current I1 and the second main current I2 with the sum of the changes in the effective values Ie of the branch currents I15 and I16, thereby dividing the result. The construction state of the current sensors 21 and 22 can be determined.

  In the above-described embodiment and the first modification, the determination device 11 determines whether the divided current sensor 21, the first main current I <b> 1, the second main current I <b> 2, and the branch current I <b> 15 are correlated with each other. 22 construction conditions were determined. On the other hand, the discriminating device 11 is configured to discriminate the construction state of the divided current sensors 21 and 22 depending on whether or not there is a correlation between the magnitude of the main current and the magnitude of the branch current. Also good. For example, a case is assumed in which branch currents I11 and I12 are flowing in branch circuits 51 and 52 that are electrically connected to a circuit supplied with power from the first voltage system 81, respectively. In this case, the first main current I1 is equal to the sum of the branch currents I11 and I12 if the split-type current sensor 21 is normally constructed and the branch currents I13 to I16 are not flowing through the remaining branch circuits 53 to 56. Become. Therefore, when the magnitude of the first main current I1 is equal to the sum of the magnitudes of the branch currents I11 and I12, the determination device 11 has a correlation between the first main current I1 and the branch currents I11 and I12. Determine that there is. Then, the determination device 11 determines that the divided current sensor 21 is normally applied because there is a correlation between the first main current I1 and the branch currents I11 and I12.

  In the above-described embodiment and the first modified example, the determination device 11 determines whether the split-type current sensors 21 and 22 are applied depending on whether there is a correlation between the main current and the branch current or between the main currents. Was determined. On the other hand, the determination device 11 divides depending on whether there is a correlation between the main power obtained from the main current and the branch power obtained from the branch current, or between the main power obtained from the main current. You may be comprised so that the construction state of the shape current sensors 21 and 22 may be discriminate | determined. In the power measurement system 1 according to this embodiment, the power consumption consumed in each of the plurality of branch circuits 5 is calculated by the calculation device 13. In the power measurement system 1 according to the present embodiment, the first main power and the second main power can be calculated based on each of the first main current I1 and the second main current I2 and the line voltage. . Therefore, the determination device 11 can determine the construction state of the divided current sensors 21 and 22 depending on whether or not there is a correlation between each of the first main power and the second main power and the branch power. Even in this case, the power change may be a change in the effective value of the current for obtaining the power, a change in the frequency component included in the current, or a change in the current waveform. There may be.

  In the above-described embodiment and the first modification, the case where there are two split-type current sensors has been described as an example. However, the number of split-type current sensors is not limited to two, and may be at least one. Moreover, although the above-mentioned embodiment and the 1st modification demonstrated as an example the case where the current sensor 20 which measures the branch current which flows through each of the some branch circuit 5 is a Rogowski coil, also about these current sensors 20, A split-type current sensor having a split structure may be used.

  In the above-described embodiment and the first modified example, the case where the split-type current sensors 21 and 22 are CT sensors has been described as an example. However, the split-type current sensors 21 and 22 are not limited to CT sensors, for example, Hall elements, GMRs. A sensor using a magnetoresistive element such as an element may be used.

  In the above-described embodiment and the first modification, the case where the determination device 11 is included in the measurement unit 63 has been described as an example, but the determination device 11 may not be included in the measurement unit 63. In other words, the determination device 11 may be configured integrally with the measurement device 12 or may be configured separately from the measurement device 12.

  In the above-described embodiment, the case where the determination system 2 includes the measurement device 12 has been described as an example. However, the determination system 2 includes the determination device 11 and a plurality of current sensors 21, 22, 201 to 206. The measuring device 12 may not be provided.

  The display device 15 may be a portable information terminal such as a tablet terminal or a smartphone. In this case, the builder can check the discrimination result of the discrimination device 11 even at a position away from the distribution board 6.

  In the above-described embodiment and the first modified example, the case where the divided structure is a divided core has been described as an example. However, the divided structure is not limited to a divided core, and for example, is a divided structure that is divided into two in a Rogowski coil. May be.

(Summary)
As is clear from the embodiment described above, the discrimination system (2) according to the first aspect includes a plurality of current sensors (20, 21, 22) and a discrimination device (11). The plurality of current sensors (20, 21, 22) include at least one divided current sensor (21, 22) having a divided structure, and a plurality of measurement points in one electric circuit (for example, the third voltage system 83). The current flowing through (P1, P2, P15, P16) is measured. The discriminating device (11) determines whether the divided current sensor (21, 22) depends on whether there is a correlation between two or more currents or between two or more powers obtained from two or more currents. Determine construction status. Two or more currents are measured by two or more current sensors including the split-type current sensors (21, 22) among the plurality of current sensors (20, 21, 22).

  According to the first aspect, the discriminating device (11) is divided into two or more currents depending on whether there is a correlation between two or more currents or between two or more powers obtained from two or more currents. The construction state of the current sensors (21, 22) is determined. Therefore, the installer does not have to visually confirm the construction state or discriminate the construction state from the measurement result as in the conventional split-type current transformer, and according to the discrimination result of the discrimination device (11). The construction state of the split-type current sensor (21, 22) can be easily determined.

  The discriminating system (2) according to the second aspect is, in the first aspect, a power distribution circuit that is electrically connected to the power line (4) and distributes the power from the power line (4) to the plurality of branch circuits (5). Used for board (6). The split-type current sensors (21, 22) measure main currents (first main current I1, second main current I2) flowing through the power line (4). Of the plurality of current sensors (20, 21, 22), the remaining current sensors (20) other than the split-type current sensors (21, 22) are electrically connected to one electric circuit of the plurality of branch circuits (5). At least one branch current flowing through the connected at least one branch circuit (5) is measured. The discriminator (11) determines whether there is a correlation between the change in the main current and the change in the branch current or the change in the main power and the change in the branch power. ) To determine the construction state. The main power is obtained from the main current, and the branch power is obtained from the branch current.

  According to the second aspect, the construction state of the split-type current sensor (21, 22) is determined based on the change in the main current flowing through the power line (4) and the branch current flowing through the branch circuit (5). Can do.

  In the discriminating system (2) according to the third aspect, in the second aspect, the power line (4) includes the first electric wire (first voltage line 41), the second electric wire (second voltage line 42), and the third electric wire. (Neutral wire 43). Each of the plurality of branch circuits (5) is electrically connected to one of the first electric wire and the second electric wire and the third electric wire. The main current (first main current I1, second main current I2) is a current that flows through one of the first electric wire and the second electric wire.

  According to the third aspect, in the single-phase three-wire distribution system, the split-type current sensor (21, 22) is based on the main current flowing through the power line (4) and the branch current flowing through the branch circuit (5). ) Can be determined.

  The discriminating system (2) according to the fourth aspect is the power distribution circuit according to the first aspect, which is electrically connected to the power line (4) and distributes the power from the power line (4) to the plurality of branch circuits (5). Used for board (6). The power line (4) includes a first electric wire (first voltage line 41), a second electric wire (second voltage line 42), and a third electric wire (neutral wire 43). The split-type current sensor (21, 22) measures the first main current (I1) flowing through the first electric wire (first) split-type current sensor (21) and the second main current (I2) flowing through the second electric wire. ) (Second) split-type current sensor (22). Whether the discriminating device (11) has a correlation between the change of the first main current (I1) and the change of the second main current (I2), or between the change of the first power and the change of the second power The construction state of the split-type current sensor (21, 22) is determined depending on whether or not. The first power is obtained from the first main current (I1), and the second power is obtained from the second main current (I2).

  According to the fourth aspect, the construction state of the split-type current sensor (21, 22) is determined only by comparing the main currents flowing through the first electric wire and the second electric wire, or the main power obtained from the main current. can do.

  The discriminating system (2) according to the fifth aspect is the power distribution circuit according to the first aspect, electrically connected to the power line (4) and distributing the power from the power line (4) to the plurality of branch circuits (5). Used for board (6). The power line (4) includes a first electric wire (first voltage line 41), a second electric wire (second voltage line 42), and a third electric wire (neutral wire 43). The split-type current sensor (21, 22) measures a main current (first main current I1, second main current I2) flowing through one of the first electric wire and the second electric wire. Of the plurality of current sensors (20, 21, 22), the remaining current sensors (20) other than the split-type current sensors (21, 22) are electrically connected to one electric circuit of the plurality of branch circuits (5). At least one branch current flowing through the connected at least one branch circuit (5) is measured. The discriminator (11) determines whether there is a correlation between the magnitude of the main current and the magnitude of the branch current or between the magnitude of the main power and the magnitude of the branch power. ) To determine the construction state. The main power is obtained from the main current, and the branch power is obtained from the branch current.

  According to the fifth aspect, the construction state of the split-type current sensor (21, 22) can be determined only by comparing the magnitude of the current or the magnitude of the electric power.

  In the discrimination system (2) according to the sixth aspect, in any one of the second to fourth aspects, the current change and the power change are changes in the effective value of the current.

  According to the sixth aspect, it is possible to reduce the processing load on the determination device 11 as compared with a case where changes in current waveforms are compared.

  In the discrimination system (2) according to the seventh aspect, in any one of the second to fourth aspects, the change in current and the change in power are changes in the waveform of the current.

  According to the 7th aspect, the discrimination | determination precision in the discrimination | determination apparatus 11 can be improved compared with the case where the change of the effective value of an electric current or the change of the frequency component contained in an electric current is compared.

  In the discrimination system (2) according to the eighth aspect, in any one of the second to fourth aspects, the change in current and the change in power are changes in frequency components included in the current.

  According to the eighth aspect, it is possible to reduce the processing load on the discriminating apparatus 11 as compared with the case where changes in current waveforms are compared.

  The distribution board (6) which concerns on a 9th aspect is provided with the discrimination | determination system (2) of the aspect in any one of the 1st-8th, and the cabinet (60) which accommodates the discrimination | determination system (2).

  According to the ninth aspect, by applying the discrimination system (2) of any one of the first to eighth aspects to the distribution board (6), the power line (4) drawn into the distribution board (6). It is possible to easily determine the construction state of the split-type current sensor (21, 22) that measures the main current flowing through the.

  The determination method according to the tenth aspect includes a determination step. The discriminating step includes at least one split current sensor having a split structure (21 depending on whether there is a correlation between two or more currents or between two or more powers obtained from two or more currents. , 22) is a step of discriminating the construction state. The split-type current sensor (21, 22) includes a plurality of current sensors (20 that measure current flowing through a plurality of measurement points (P1, P2, P15, P16) in one electric circuit (for example, the third voltage system 83). , 21, 22). Two or more currents are measured by two or more current sensors including the split-type current sensors (21, 22) among the plurality of current sensors (20, 21, 22).

  According to the 10th aspect, even if it does not use a dedicated discrimination device (11), the function equivalent to the discrimination system (2) which concerns on this embodiment can be implement | achieved, and construction of a split type current sensor (21, 22) The state can be easily determined.

  A program according to an eleventh aspect causes a computer to execute a determination step. The discriminating step includes at least one split current sensor having a split structure (21 depending on whether there is a correlation between two or more currents or between two or more powers obtained from two or more currents. , 22) is a step of discriminating the construction state. The split-type current sensor (21, 22) includes a plurality of current sensors (20 that measure current flowing through a plurality of measurement points (P1, P2, P15, P16) in one electric circuit (for example, the third voltage system 83). , 21, 22). Two or more currents are measured by two or more current sensors including the split-type current sensors (21, 22) among the plurality of current sensors (20, 21, 22).

  According to the 11th aspect, even if it does not use a dedicated discrimination device (11), the function equivalent to the discrimination system (2) which concerns on this embodiment can be implement | achieved, and construction of a division | segmentation type current sensor (21, 22) The state can be easily determined.

  About the structure which concerns on a 2nd-8th aspect, it is not an essential structure of the discrimination | determination system (2), and can be abbreviate | omitted suitably.

2 Discriminating System 11 Discriminating Device 20 Current Sensor 21 Current Sensor ((First) Split Type Current Sensor)
22 Current sensor ((second) split-type current sensor)
4 Power line 41 1st voltage line (1st electric wire)
42 Second voltage line (second electric wire)
43 Neutral wire (3rd electric wire)
5 Branch circuit 6 Distribution board 60 Cabinet 81 1st voltage system (electric circuit)
82 Second voltage system (electric circuit)
83 Third voltage system (electric circuit)
I1 1st main current (main current)
I2 Second main current (main current)
P1, P2, P11 to P16 Measurement points

Claims (11)

A plurality of current sensors including at least one split-type current sensor having a split structure and measuring current flowing through a plurality of measurement points in one electric circuit;
Of the plurality of current sensors, between two or more currents measured by two or more current sensors including the split current sensor, or two or more powers obtained from the two or more currents A discriminating system comprising: a discriminating device that discriminates a construction state of the divided current sensor according to whether or not there is a correlation between them. It is electrically connected to a power line and used for a distribution board that distributes power from the power line to a plurality of branch circuits,
The split current sensor measures a main current flowing through the power line,
Among the plurality of current sensors, the remaining current sensors other than the split-type current sensor measure branch currents flowing through at least one branch circuit electrically connected to the one circuit among the plurality of branch circuits. And
Whether the discriminator has a correlation between the change of the main current and the change of the branch current, or the change of the main power obtained from the main current and the change of the branch power obtained from the branch current. The discrimination system according to claim 1, wherein the discrimination system is configured to discriminate a construction state of the split-type current sensor according to whether or not. The power line has a first electric wire, a second electric wire, and a third electric wire,
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,
The discrimination system according to claim 2, wherein the main current is a current flowing through one of the first electric wire and the second electric wire. 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 current sensors, as the split type current sensor, are a first split type current sensor that measures a first main current flowing through the first electric wire, and a second main type that measures a second main current flowing through the second electric wire. A split-type current sensor, and
The discriminating device is configured to obtain a second time obtained from a change in the first main current obtained from the first main current and a change in the first main current between the change in the first main current and the change in the second main current. The determination system according to claim 1, wherein the determination state is determined based on whether or not there is a correlation with a change in main power. 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 split current sensor measures a main current flowing through one of the first electric wire and the second electric wire,
Among the plurality of current sensors, the remaining current sensors other than the split-type current sensor measure branch currents flowing through at least one branch circuit electrically connected to the one circuit among the plurality of branch circuits. And
Whether the discrimination device has a correlation between the magnitude of the main current and the magnitude of the branch current, or between the magnitude of the main power obtained from the main current and the magnitude of the branch power obtained from the branch current. The discrimination system according to claim 1, wherein the discrimination system is configured to discriminate a construction state of the split-type current sensor according to whether or not. The discrimination system according to any one of claims 2 to 4, wherein the change in the current and the change in the power are changes in the effective value of the current. The determination system according to claim 2, wherein the change in current and the change in power are changes in the waveform of the current. The discrimination system according to any one of claims 2 to 4, wherein the change in the current and the change in the power are changes in frequency components included in the current. The discrimination system according to any one of claims 1 to 8,
A distribution board comprising: a cabinet that houses the discrimination system. Two or more current sensors including at least one split-type current sensor, including at least one split-type current sensor having a split structure, and measuring the current flowing through a plurality of measurement points in one electric circuit. A discriminating step for discriminating the construction state of the split-type current sensor according to whether there is a correlation between two or more measured currents or two or more electric powers obtained from the two or more currents. A determination method comprising: On the computer,
Two or more current sensors including at least one split-type current sensor, including at least one split-type current sensor having a split structure, and measuring the current flowing through a plurality of measurement points in one electric circuit. A discriminating step for discriminating the construction state of the split-type current sensor according to whether there is a correlation between two or more measured currents or two or more electric powers obtained from the two or more currents. A program for running