JP6006776B2 - Electric device identification method and electric device identification device - Google Patents

Description

  The present invention relates to an electric device identification method and an electric device identification device, and more particularly to an electric device identification method and an electric device identification device for identifying an electric product based on a measured current.

  Conventionally, the power consumption of electrical products used in homes and factories has been visualized, and the power consumption used is managed to save energy.

  Therefore, for example, Non-Patent Document 1 discloses a method for measuring a current waveform using a current sensor installed on a distribution board in a house and identifying an electric product in operation from the shape of the measured current waveform. ing.

Kazuhiro Takatani, Yasunao Suzuki, Fumihiko Ishiyama, Masaki Kasai, Noboru Iwasaki, Kimihiro Tajima, “Study on Estimating Operational Status of Home Appliances Utilizing Characteristics of Conducted Interference Waves Generated by Home Appliances” IEICE Technical Report, vol. 112, no. 73, EMCJ2012-14, pp. 29-34, May 2012

  However, in the conventional method, it is possible to identify an electric device that is fed by a single-phase two-wire system or a single-phase three-wire system, but an electrical product that is fed by a three-phase three-wire system can be identified. Was difficult.

  In the single-phase two-wire or single-phase three-wire power supply method, the electric product having the single-phase load is supplied with two wires. In the three-phase three-wire power supply method, the electric power having the three-phase load is supplied. Power is supplied to the product through three wires. In the conventional method, the current flowing in one of the two wires connected to the single-phase load (in the case of the single-phase three-wire system, the wire other than the grounded neutral wire) is measured by one sensor, The appliance was identified based on the measured current. Since the same waveform current flows through the two wires connected to the input and output of the single-phase load, the current waveform is the same regardless of the location of the two wires.

  However, when the identification target is an electric device having a three-phase load, the waveforms of the currents flowing through the three wires connected to the three-phase load are different. Therefore, in the conventional method of measuring current using one current sensor, it is necessary to change the current sensor every time the current flowing through the three wires is measured, and it takes time to identify the electric device. was there.

  The present invention has been made in view of such problems, and an object of the present invention is to identify an electric device and an electric device identification device for quickly identifying an electric product fed by a three-phase three-wire system. Is to provide.

  In order to achieve such an object, the present invention provides a method by an apparatus for identifying an electric product connected to two wires and fed with power, the apparatus comprising: A database in which first waveform data and second waveform data for identifying an electrical product are stored in advance; a first current flowing in the first wiring of the two wirings is measured; Measuring a second current flowing in a second wiring of the two wirings, measuring a line voltage applied between the first wiring and the second wiring, and the measurement Based on the phase of the measured line voltage, a first identification waveform for a desired period is obtained from the measured first current, and a second period for the period is obtained from the measured second current. Obtaining an identification waveform, the first identification waveform and the Arranging two identification waveforms in a predetermined order to generate an alignment waveform, and whether the waveform data corresponding to the first identification waveform of the alignment waveforms matches the first waveform data Determining whether the waveform data corresponding to the second identification waveform of the aligned waveforms matches the second waveform data; and the waveform corresponding to the first identification waveform When the first waveform data matches the first waveform data and the waveform data corresponding to the second identification waveform matches the second waveform data, the first waveform data and the second waveform data And a step of displaying identification information of the electric product associated with the waveform data.

  As described above, according to the present invention, it is possible to quickly identify an electrical product that is fed by a three-phase three-wire system.

It is a block diagram which shows the structure containing the electric equipment identification device which concerns on Example 1-1 of this invention. It is a functional block diagram which shows the software configuration of the server which concerns on Example 1-1 of this invention. It is a figure for demonstrating the _{production |} generation of an identification waveform based on Example 1-1 of this invention, (a) shows the voltage waveform of the measured line voltage _V3AC , (b) is measured. shows a current waveform of the line current I _3A, (c) shows the current waveform of the measured line current I _3C, (d) shows the identification waveform I _{3A_id,} (e) the identification waveform I _{3C_id} (F) shows the alignment waveform I _{3AC_id} . It is a flowchart which shows the electric equipment identification method which concerns on Example 1-1 of this invention. It is a block diagram which shows the structure containing the electric equipment identification device which concerns on Example 1-2 of this invention. It is a block diagram which shows the structure containing the electric equipment identification device which concerns on Example 1-3 of this invention. It is a functional block diagram which shows the software configuration of the server which concerns on Example 2 of this invention. It is a flowchart which shows the electric equipment identification method which concerns on Example 2 of this invention. It is a figure which shows the structure containing the electric equipment identification device which concerns on Example 3 of this invention. It is a figure which shows the structure containing the electric equipment identification device which concerns on Example 3 of this invention. It is a figure which shows the structure containing the electric equipment identification device which concerns on Example 4 of this invention. It is a functional block diagram of the software configuration of the server based on Example 4 of this invention. It is a figure which shows an example of the spectrum-ized high frequency component based on Example 4 of this invention. Using synthetic waveform is a diagram for explaining a method of identifying a plurality of electric devices, (a) represents a current waveform I _xA flowing through the waveform V _x and the electric device A of the voltage applied to the electric apparatus A (B) shows the relationship between the waveform V _{x of the} voltage applied to the electrical device B and the current waveform I _xB flowing through the electrical device B, and (c) shows the current waveform I _xA and the current waveform. A current waveform I _c obtained by combining I _xB is shown.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In this specification, electrical products having a single-phase load include, for example, home appliances such as telephones, facsimiles, lighting, refrigerators, washing machines, vacuum cleaners, air conditioners, televisions, and personal computers, and ICT (such as servers and routers). Information and Communication Technology: equipment. Moreover, electrical products having a three-phase load include, for example, commercial electrical products such as a freezer, a fryer, a fan, and an air conditioner. The three-phase load refers to, for example, an electric motor (motor) that is a driving source necessary for the operation of an electric product.

<Example 1>
(Example 1-1)
〔Constitution〕
FIG. 1 shows a configuration including an electrical equipment identification device according to Embodiment 1-1 of the present invention. The three-phase three-wire power source 1 includes commercial power sources 1A, 1B, and 1C that are delta-connected. The power output from the three-phase three-wire power source 1 is divided by the distribution board 2 and supplied to the three-phase load Z in the electric device 4 through the wiring. The three-phase load Z is composed of three loads Z _A , Z _B and Z _C connected in a delta connection.

In the three-phase three-wire power supply method shown in FIG. 1, the phase voltage (for example, 200V) of the commercial power supply 1A is the line spacing between the wiring (first phase line) 3A and the wiring (second phase line) 3C. It becomes the same as the voltage V _3AC and is applied to the load Z _A in the electric device 4. Further, in the three-phase three-wire power feeding method shown in FIG. 1, the phase voltage of the commercial power supply 1B is the same as the line voltage V _3AB between the wiring 3A and the wiring (third phase line) 3B. is applied to the load Z _B in 4, the phase voltage of the commercial power supply 1C, should be the same as, applied to the load Z _C in an electric equipment 4 and the line voltage V _3BC between the wiring 3B and the wiring 3C. Line current I _3A to the wiring 3A, the line current I _3B to the wiring 3B, line current I _3C to the wiring 3C flows respectively, the load Z is _A phase current I _A, the load Z phase current I _B to _B, A phase current I _c flows through each load Z _c .

A current sensor 5A is installed in the wiring 3A, and a current sensor 5C is installed in the wiring 3C. Further, a voltage sensor 6 for measuring the line voltage V _3AC is installed in the wiring 3A and the wiring 3C. The current measured by the current sensors 5 </ b> A and 5 </ b> C and the voltage measured by the voltage sensor 6 are converted from analog to digital by the A / D converter 7 and transmitted to the electric device identification device 8. And the electric equipment identification device 8 produces | generates an identification waveform from the waveform of the measured electric current on the basis of the phase of the measured voltage, and identifies the electric equipment 4 using the said identification waveform. Note that the measured current and voltage may be transmitted to the electrical device identification device 8 via an NW (network) configured by a LAN (Local Area Network), for example.

  The current sensor 5A, the current sensor 5C, and the voltage sensor 6 installed in the wiring 3A and the wiring 3C are detachable. Therefore, each sensor is easily removed from the wiring 3A and the wiring 3C connected to the three-phase three-wire power source 1 and replaced with a wiring connected to another type of power source such as a single-phase three-wire type. (See the description of FIG. 10). Therefore, according to the embodiment of the present invention, it is possible to identify an electric device connected to various types of power supply wiring.

  The electrical apparatus identification device 8 according to Example 1-1 of the present invention includes a server 81 and a database 82 for storing various data generated by the server 81. The server 81 includes a CPU (Central Processing Unit), and each functional unit described later is executed by the CPU. The database 82 is configured by a storage area such as a ROM (Read Only Memory) or a RAM (Random Access Memory). The server 81 may incorporate an A / D conversion function, and the A / D converter 7 may be omitted.

  FIG. 2 shows a functional block diagram of the software configuration of the server according to Embodiment 1-1 of the present invention. The server 81 includes functions of a current measurement unit (first measurement unit) 811, a voltage measurement unit (second measurement unit) 812, an identification waveform acquisition unit 813, an aligned waveform generation unit 814, a determination unit 815, and a display unit 816. It is the composition provided with the part.

[Operation]
The current measuring unit 811 measures the line current (first current) I _3A flowing through the wiring _3A by the current sensor 5A, and measures the line current (second current) I _3C flowing through the wiring _3C by the current sensor 5C. The voltage measuring unit 812 measures the line voltage V _3AC between the wiring 3 A and the wiring 3 C using the voltage sensor 6.

FIG. 3 is a diagram for explaining generation of an identification waveform according to Example 1-1 of the present invention. 3A shows the voltage waveform of the measured line voltage V _3AC , FIG. 3B shows the measured waveform of the line current I _3A , and FIG. 3C shows the measured waveform of the line voltage V _3AC . line current indicates a current waveform I _3C, FIG. 3 (d) shows the identification waveform I _{3A_id,} FIG. 3 (e) shows the identification waveform I _{3C_id,} FIG. 3 (f) is aligned waveform I _{3AC_id} Indicates. In this specification, it is _{assumed that} the cycle of the line voltage V _3AC , the cycle of the line current I _3A , and the cycle of the line current I _3C match.

The identification waveform acquisition unit 813 generates an identification waveform I _{3A_id} by dividing the measured line current I _3A by a desired period with the phase of the measured line voltage V _3AC as a reference, and also measures the measured line An identification waveform I _{3C_id} is generated and obtained by dividing the current I _3C by a desired period. The desired period is, for example, a period for one cycle. The acquired identification waveforms I _{3A_id} and I _{3C_id} are stored in the database 82.

Specifically, the identification waveform acquisition unit 813 uses the phase of the line voltage V _3AC shown in FIG. _3A , for example, 2π (rad) as a reference, and the current of the line current I _3A shown in FIG. The waveform is _divided by one cycle of the line voltage V _3AC to generate an identification waveform I _{3A_id} shown in FIG. Further, the identification waveform acquisition unit 813 _divides the current waveform of the line current I _3C shown in FIG. _3C by one cycle of the line voltage V _3AC to generate the identification waveform I _{3C_id} shown in FIG.

Next, the alignment waveform generating unit 814 arranges in accordance with a predetermined order the identification waveform I _{3C_id} shown in FIG identification shown in (d) of the waveform I _{3A_id} and FIG. 3 (e), the alignment waveform shown in FIG. 3 (f) I _{3AC_id} is generated. The alignment waveform I _{3AC_id} is a waveform in which the identification waveform I _{3A_id} and the identification waveform I _{3C_id} are arranged in time series. Regarding the predetermined order, for example, the identification waveform I _{3A_id} based on the line current I _3A flowing in the first phase line is the first waveform, and the identification waveform I _{3C_id} based on the line current I _3C flowing in the second phase line is the second. Line up as a waveform.

_A relational expression between the line current I _3A and the phase current I _A and the phase current I _B is shown in the following (Formula 1).
I _3A = I _B −I _A (Formula 1)
_A relational expression between the line current I _3C and the phase current I _A and the phase current I _C is shown in the following (Formula 2).
I _3C = I _A −I _C (Formula 2)
From (Equation 1) and (Equation 2), it can be understood that the line current I _3A and the line current I _3C include respective components of the phase currents I _A , I _B , and I _C flowing in the three-phase load. It can be seen that the alignment waveform I _{3AC_id} generated from the line currents I _3A and I _3C also includes the components of the three phase currents I _A , I _B , and I _C. Therefore, by using the alignment waveform I _{AC_id} having the characteristics of the waveform of the phase current flowing through each of the three-phase loads, it is possible to accurately identify the electric device having the three-phase load. The generated alignment waveform and the identification information of the electric device having the corresponding three-phase load are stored in the database 82 in advance, and the newly generated alignment waveform and the stored alignment waveform are compared and matched. In this case, the identification information of the corresponding electric device may be displayed. Further, the obtained two identification waveforms may be handled as individual waveform data without being arranged, and each waveform data may be used for identification of an electric device.

The determination unit 815 determines whether or not the waveform corresponding to the identification waveform I _{3A_id} in the aligned waveform I _{3AC_id matches} the waveform (first waveform) I ₁ stored in advance in the database for comparison with the identification waveform. In addition, it is determined whether or not the waveform corresponding to the identification waveform I _{3C_id} in the aligned waveform I _{3AC_id matches} the waveform (second waveform) I ₂ stored in the database in advance. Matching in this specification means a case where the mutual waveforms exceed a predetermined degree of approximation.

When the waveform corresponding to the identification waveform I _{3A_id} matches the waveform I ₁ and the waveform corresponding to the identification waveform I _{3C_id} matches the waveform I ₂ , the display unit 816 displays the data of the waveform I ₁ and the waveform I. For example, the identification information of the electric device associated with the data ₂ is displayed on a display device such as a display, or the information is transmitted by a wireless method and displayed on the screen of a portable terminal (for example, a smartphone). The identification information of the electric device includes, for example, information such as the model name of the electric device, the power consumed by the electric device, and the operation status such as ON / OFF.

〔flowchart〕
FIG. 4 shows a flowchart of the electric equipment identifying method according to Embodiment 1-1 of the present invention. The current measuring unit 811 measures the line current I _3A flowing through the wiring 3A by the current sensor 5A, and measures the line current I _3C flowing through the wiring 3C by the current sensor 5C (S101). The voltage measuring unit 812 measures the line voltage V _3AC between the wiring 3A and the wiring 3C (S102). The identification waveform acquisition unit 813 acquires an identification waveform I _{3A_id} for a desired period from the measured line current I _3A with reference to the phase of the measured line voltage V _3AC , and the measured line current I An identification waveform I _{3C_id} for a desired period is acquired from _3C (S103). The alignment waveform generation unit 814 arranges the acquired identification waveform I _{3A_id} and the identification waveform I _{3C_id according} to a predetermined order to generate the alignment waveform I _{3AC_id} (S104). The determination unit 815 determines _whether the waveform corresponding to the identification waveform I _{3A_id} in the alignment waveform I _{3AC_id} matches the waveform I ₁ stored in advance in the database, and also determines the identification waveform I _{3C_id in the} alignment waveform I _{3AC_id.} It is determined whether or not the waveform corresponding to 1 matches the waveform I ₂ stored in the database in advance (S105). When the waveform corresponding to the identification waveform I _{3A_id} matches the waveform I ₁ , and the waveform corresponding to the identification waveform I _{3C_id} matches the waveform I ₂ , the display unit 815 displays the data of the waveform I ₁ and the waveform I The identification information of the electrical equipment linked to the data ₂ is displayed (S106).

  According to the present embodiment, it is possible to quickly identify an electric product fed by a three-phase three-wire system.

(Example 1-2)
In Example 1-1 of the present invention, the three-phase three-wire power source 1 and the three-phase load Z are delta-connected, but even if the three-phase three-wire power source and the three-phase load are star-connected. Can identify electrical products.

FIG. 5 shows a configuration including an electrical equipment identification device according to Embodiment 1-2 of the present invention. The three-phase three-wire power source 1 ′ is composed of commercial power sources 1′A, 1′B, and 1′C that are star-connected. The electric power output from the three-phase three-wire power source 1 ′ is divided by the distribution board 2 and supplied to the three-phase load Z ′ in the electric device 4 ′ through the wiring. The three-phase load Z ′ is composed of three loads Z ′ _A , Z ′ _B and Z ′ _C connected in a star connection.

In a three-phase three-wire power supply system shown in FIG. 5, the phase current flowing from the commercial power source 1'A is' the same as _3A, electrical equipment 4 'line current I flowing through the wire 3A to the load Z' _A in Flowing. Further, in the three-phase three-wire power supply system shown in FIG. 5, the phase current flowing from the commercial power source 1'B, 'is the same as _3B, electrical equipment 4' line current I flowing through the wiring 3B the load Z ' Flows to _B. Furthermore, the phase current flowing from the commercial power source 1'C is' the same as _3C, electrical equipment 4 'line current I flowing through the wiring 3C flowing through the load Z' _C within.

In the electrical equipment identification apparatus 8 which concerns on Example 1-2 of this invention, the process similar to Example 1-1 of this invention is performed. The identification waveform acquisition unit 813 _divides the current waveform of the line current I ′ _3A measured by the current measurement unit 811 with a desired period based on the phase of the line voltage V ′ _3AC measured by the voltage measurement unit 812. The identification waveform I ′ _{3A_id} is generated, and the current waveform of the line current I ′ _3C measured by the current measuring unit 811 is _divided by a desired period to generate the identification waveform I ′ _{3C_id} , respectively. Then, the alignment waveform generation unit 814 arranges the identification waveform I ′ _{3A_id} and the identification waveform I ′ _{3C_id} in a predetermined order to generate the alignment waveform I ′ _{3AC_id} . The determination unit 814 determines whether or not the waveform corresponding to the identification waveform I ′ _{3A_id} among the alignment waveforms I ′ _{3AC_id} and the waveform I ′ ₁ for comparison with the identification waveform stored in the database in advance match. In addition, it is determined whether or not the waveform corresponding to the identification waveform I ′ _{3C_id} among the aligned waveforms I ′ _{3AC_id} matches the waveform I ′ ₂ stored in the database in advance. Display unit 815, the 'waveform and waveform I corresponding to _{3A_id' 1} identification waveform I match, and, if the 'waveform and waveform I corresponding to _{3C_id' 2} identification waveform I are the same, the waveform I _'1 And the identification information of the electric device associated with the data of the waveform I ′ ₂ are displayed on a display device such as a display.

  According to the present embodiment, even in the case of star connection, it is possible to quickly identify an electric product fed by a three-phase three-wire system.

(Example 1-3)
The identification target according to the embodiment of the present invention can be an identification target for not only an electric device having a three-phase load but also an electric device having a single-phase load.

FIG. 6 shows a configuration including an electrical equipment identification device according to Embodiment 1-3 of the present invention. The electric power output from the three-phase three-wire power source 1 is divided by the distribution board 2 and supplied to the single-phase load Z ₉ in the electric device 9 through the wiring. In the three-phase three-wire power supply method shown in FIG. 6, the phase voltage of the commercial power supply 1B is the same as the line voltage V _3AB between the wiring 3A and the wiring 3B, and the single-phase load Z ₉ in the electric device ₉ To be applied.

In this embodiment, the wiring 3A, since the single-phase load Z ₉ of the electric device 9 is connected, the line current I _3A flowing through the wires 3A, the current flowing through the single-phase load Z ₉ of the electrical device 9 Detected as On the other hand, since no load is connected to the wiring 3C, the line current I _3C flowing through the wiring 3C is not detected. Therefore, the identification waveform acquisition unit 813 generates and acquires the identification waveform I _{3A_id} by dividing the measured current waveform of the line current I _3A by a desired period on the basis of the phase of the measured line voltage V _3AC. . The current value of the line current I _3C is 0 and is not measured.

The determination unit 815 determines whether or not the identification waveform I _{3A_id} matches the waveform I ₉ stored in the database in advance for comparison with the identification waveform. When the identification waveform I _{3A_id} matches the waveform I ₉ , the display unit 816 displays the identification information of the electric device having a single-phase load _linked only to the data of the waveform I _{9 on} a display device such as a display. indicate.

  According to the present embodiment, it is possible to quickly identify an electrical product fed by a three-phase three-wire system even if it has a single-phase load. That is, the electric device identification apparatus according to the first embodiment can be applied in common regardless of whether the load of the electric device to be identified is a single-phase load or a three-phase load.

  In Example 1 of the present invention, when any one of the two sensors does not detect a current, it may be determined that the load of the electrical device to be identified is a single phase. In the determination process of the determination unit 815, referring to the information of the determination, first, it may be selected whether it is a single-phase load or a three-phase load.

<Example 2>
In the second embodiment of the present invention, the phase current flowing through each load of the three-phase load is estimated using the waveform of the line current measured from the two wires in the first embodiment, and the waveform of the estimated phase current is estimated. Based on the above, three identification waveforms are generated. By identifying the electrical device using the three identification waveforms, it is possible to identify more accurately than in the first embodiment.

〔Constitution〕
Configurations other than the electrical device identification apparatus in the present embodiment, for example, the configurations of a three-phase three-wire power source, a distribution board, and electrical devices are the same as those in the first embodiment. The electrical device identification apparatus according to the present embodiment includes a server 91 described later instead of the server 81 according to the first embodiment. The server 91 in the present embodiment further includes a current estimation unit in addition to the functional units of the server in the first embodiment.

  FIG. 7 shows a functional block diagram of the software configuration of the server 91 according to the second embodiment of the present invention. In the present embodiment, in addition to the function units 811 to 816 in FIG. 2 according to the first embodiment, a current estimation unit 911 is provided.

[Operation]
Based on the line current I _3A and the line current I _3C measured by the current measuring unit 811, the current estimation unit 911 has values of three phase currents I _A , I _B , and I _C flowing through the respective loads of the three-phase load Z. Is estimated. First, the current estimation unit 911 calculates a line current I _3B . As a method of calculating the line current I _3B , for example, the power used by two loads out of three three-phase loads is calculated, and the power used by the remaining loads is obtained based on the calculated power. There is a method using the theorem. In this case, in addition to the line voltage V _3AC, previously measured line voltage V _3AB and line voltage V _3BC.

The current estimation unit 911 calculates the values of the three phase currents I _A , I _B , and I _C using the following three relational expressions (Formula 3), (Formula 4), and (Formula 5). presume.
I _A = I _C + I _3C (Formula 3)
I _B = I _A + I _3A (Formula 4)
I _C = I _B + I _3B (Formula 5)
The identification waveform acquisition unit 813 estimates the identification waveform I _{A_id} for a desired period from the estimated phase current I _{A based} on the phase of the measured line voltage V _3AC in the same process as in the first embodiment. The identification waveform I _{B_id} for a desired period is generated from the phase current I _B generated, and the identification waveform I _{C_id} for the desired period is generated from the estimated phase current I _C.

The determination unit 815 determines whether or not the identification waveform I _{A_id} matches the waveform I ₄ stored in advance in the database. In addition, the determination unit 814 determines _{whether the} identification waveform I _{B_id} and the waveform I ₅ match and the identification waveform I _{C_id} matches the waveform I _{6 by} the same processing as in the first embodiment. When the identification waveform I _{A_id} and the waveform I ₄ , the identification waveform I _{B_id} and the waveform I ₅ , and the identification waveform I _{C_id} and the waveform I ₆ all match, the display unit 815 displays the data of the waveform I ₄ and the waveform I The identification information of the electrical equipment associated with the data _{5 and} the data of the waveform I ₆ is displayed on a display device such as a display, for example.

〔flowchart〕
FIG. 8 shows a flowchart of the electric equipment identifying method according to the second embodiment of the present invention. The current measuring unit 811 measures the line current I _3A flowing in the wiring 3A by the current sensor 5A, and measures the line current I _3C flowing in the wiring 3C by the current sensor 5C (S201). The voltage measuring unit 812 measures the line voltage V _3AC between the wiring 3A and the wiring 3C (S202). The current estimation unit 911 estimates three phase currents I _A , I _B , and I _C based on the line current I _3A and the line current I _3C measured by the current measurement unit 811 (S203). The identification waveform acquisition unit 813 acquires an identification waveform I _{A_id} for a desired period from the estimated phase current I _A on the basis of the measured phase of the line voltage V _3AC , and from the estimated phase current I _B get the desired period of identification waveform I _{B_ID,} acquires the desired period of identification waveform I _{c_id} from the estimated line current I _C (S204). Determination unit 814 identifies the waveform I _{A_id} previously determined whether the waveform stored in the database I ₄ matches, it is determined whether the waveform I ₅ previously stored in the database with the identification waveform I _{B_ID} matches, identification It is determined whether the waveform I _{C_id} matches the waveform I ₆ stored in the database in advance (S205). Display unit 815, matches the identification waveform I _{A_id} and waveform I ₄ is consistent with the identification waveform I _{B_ID} and waveform I ₅ If the identification waveform I _{c_id} and waveform I ₆ match, data of the waveform I ₄ The waveform I ₅ data and the identification information of the electrical equipment associated with the waveform I ₆ data are displayed (S206).

  According to the present embodiment, it is possible to quickly identify an electric product fed by a three-phase three-wire system. Further, according to the present embodiment, it is possible to identify more accurately than in the first embodiment.

<Example 3>
A system (electric equipment identification system) having a configuration including a current sensor 5A, a current sensor 5B, a voltage sensor 6, an AD converter 7, and an electric equipment identification device 8 shown in FIG. 1 includes a single-phase two-wire system and a single-phase three-wire system. It is possible to apply to the power supply method of the type.

(Identification of electrical equipment connected to single-phase two-wire power supply)
FIG. 9 shows a configuration including an electrical equipment identification apparatus according to Embodiment 3 of the present invention. The power output from the single-phase two-wire power source 11 is divided by the distribution board 21 and supplied to the single-phase load Z ₉ in the electric device 9 through the wiring. In the single-phase two-wire power supply method shown in FIG. 9, the voltage of the single-phase two-wire power source 11 is the same as the line voltage V _31AC between the wiring (voltage line) 31A and the wiring (neutral line) 31C. next, it is applied to the single-phase load Z ₉ of the electrical device 9.

In this embodiment, the wires 3A and the wiring 3C, since the single-phase load Z ₉ of the electric device 9 is connected, the current I _31C flowing in the current I _31A and the wiring 3C flows to the wiring 3A, the electrical equipment 9 It is detected as the current flowing through the single-phase load Z ₉ of the inner.

In the single-phase two-wire power source 11 shown in FIG. 9, since the wiring 31C is grounded and the waveform of the current I _31C cannot be acquired, the current I _31A flowing through the wiring _31A is handled in this embodiment. If the wiring 31C is not grounded in the single-phase two-wire power source 11, the waveform of the current I _{31A and} the waveform of the current I _31C can be acquired. In this case, since the waveform of the acquired current I _{31A and} the waveform of the current I _31C have the same shape, the electric device may be identified using one of the current waveforms.

The identification waveform acquisition unit 813 generates and acquires an identification waveform I _{31A_id} by dividing the current waveform of the current I _31A flowing through the measured wiring 31A by a desired period based on the phase of the measured line voltage V _31AC. To do.

The determination unit 815 determines whether or not the identification waveform I _{31A_id} matches the waveform I ₉ stored in the database in advance for comparison with the identification waveform.

When the identification waveform I _{31A_id} matches the waveform I ₉ , the display unit 816 displays the identification information of the electric device having a single-phase load _linked only to the data of the waveform I _{9 on} a display device such as a display. indicate.

(Identification of electrical equipment connected to single-phase three-wire power supply)
FIG. 10 shows a configuration including an electrical equipment identification apparatus according to Embodiment 3 of the present invention. The single-phase three-wire power source 12 includes commercial power sources 12A and 12B. The power output from the single-phase three-wire power source 12 is divided by the distribution board 22 and supplied to the single-phase load Z ₉ in the electric device 9 through the wiring. In the single-phase three-wire power feeding method shown in FIG. 10, the voltage of the commercial power supply 12A is the same as the line voltage V _32AB between the wiring (first phase line) 32A and the wiring (neutral line) 32B. It is applied to the single-phase load Z ₉ in electrical equipment 9.

In this embodiment, the wiring 32A, since the single-phase load Z ₉ of the electric device 9 is connected, the current I _32A flowing through the wiring 32A as the current flowing through the single-phase load Z ₉ of the electrical device 9 Detected. On the other hand, since no load is connected to the wiring (second phase line) 32C, the line current I _32C flowing through the wiring 32C is not detected. Therefore, the identification waveform acquisition unit 813 obtains the identification waveform I _{32A_id} by dividing the measured current waveform of the line current I _32A by a desired period on the basis of the phase of the measured line voltage V _32AC . The current value of the line current I _32C is 0 and is not measured.

The determination unit 815 determines whether or not the identification waveform I _{32A_id} matches the waveform I ₉ stored in the database in advance for comparison with the identification waveform. When the identification waveform I _{32A_id} matches the waveform I ₉ , the display unit 816 displays the identification information of the electric device having a single-phase load _linked only to the data of the waveform I _{9 on} a display device such as a display. indicate.

  Since the electrical device identification system according to the embodiment of the present invention can be applied not only to a three-phase three-wire power supply but also to a single-phase two-wire and single-phase three-wire power feeding method, a plurality of identification devices are introduced. Cost can be reduced.

<Example 4>
In the first to third embodiments of the present invention, the electric device is identified using the current waveform of one cycle of 50/60 Hz alternating current, but the high frequency component (for example, superimposed on the one cycle current waveform) It is also possible to extract a characteristic peak frequency from a high frequency component (10 kHz or higher) and identify the electrical device using the extracted peak frequency.

  FIG. 11 shows a configuration including an electrical equipment identification apparatus according to Embodiment 4 of the present invention. A high-pass filter HPF 100 is further provided upstream of the A / D converter 7 shown in FIG. The electrical device identification apparatus 10 in the present embodiment includes a server 121 described later instead of the server 81 in the first embodiment.

  FIG. 12 shows a functional block diagram of the software configuration of the server 121 according to the fourth embodiment of the present invention. In the present embodiment, in addition to the functional units 811 to 816 in FIG. 2 according to the first embodiment, a high frequency extracting unit 1211, a spectralizing unit 1212, and a peak frequency generating unit (second generating unit) 1213 are provided. ing.

High-frequency extraction unit 1211, the current at which the current sensor 5A was measured through HPF100, extracts a high frequency component (the first high frequency component) W _A, the current at which the current sensor 5C was measured through HPF100, high-frequency components (second High frequency component) W _C is extracted. Spectrum unit 1212 spectra of each frequency component W _A and the high-frequency component W _C.

FIG. 13 shows an example of a spectralized high-frequency component according to Example 4 of the present invention. The peak frequency generation unit 1213 generates, as a peak frequency, a component that exceeds the threshold in the spectralized high frequency component. Specifically, the peak frequency generation unit 1213 generates a peak frequency (the first peak frequency) P _A from the spectrum of high-frequency components W _A, spectrum of high-frequency components W _C from the peak frequency (second generating a peak frequency) P _C.

Identifying waveform acquisition unit 813, based on the phase of the measured line voltage V _3AC, the separated waveforms of the generated peak frequency P _A in the desired period identification waveform (third identification waveform) I _{PA_id} In addition, an identification waveform (fourth identification waveform) I _{PC_id} is generated by _{dividing the} generated waveform of the peak frequency P _C by a desired period and acquired.

Next, the alignment waveform generation unit 814 generates the alignment waveform (second alignment waveform) I _{PAC_id} by arranging the identification waveform I _{PA_id} and the identification waveform I _{PC_id} in a predetermined order.

The determination unit 815 determines whether or not the waveform corresponding to the identification waveform I _{PA_id} among the alignment waveforms I _{PAC_id} matches the peak frequency waveform I _P1 stored in the database in advance for comparison with the identification waveform, Further, it is determined whether or not the waveform corresponding to the identification waveform I _{PC_id} in the alignment waveform I _{PAC_id} matches the peak frequency waveform I _P2 stored in the database in advance.

The display unit 816 displays the peak frequency waveform I when the waveform corresponding to the identification waveform I _{PA_id} matches the peak frequency waveform I _P1 and the waveform corresponding to the identification waveform I _{PC_id} matches the peak frequency waveform I _P2. The identification information of the electrical equipment associated with the data of _{P1 and} the data of the peak frequency waveform I _P2 is displayed on a display device such as a display, for example.

  According to the present embodiment, it is possible to quickly identify an electric product that is fed by a three-phase three-wire system, even if a high-frequency component of the current flowing through the load is used.

<Others>
In the first to third embodiments of the present invention, it is possible to identify a plurality of operating electric devices based on the waveform of the current flowing through the distribution board. Here, two electric devices, electric device A and electric device B, will be described as an example.

FIG. 14 is a diagram for explaining a method of identifying a plurality of electrical devices using a composite waveform. 14A shows the relationship between the waveform of the voltage V _x applied to the electric device A and the waveform of the current I _xA flowing through the electric device A, and FIG. 14B is applied to the electric device B. FIG. 14C shows the relationship between the waveform of the voltage V _{x and} the waveform of the current I _xB flowing through the electric device B. FIG. 14C shows the waveform of the current I _c obtained by combining the waveform of the current I _{xA and} the waveform of the current I _xB. Show. It is assumed that the voltage V _x applied to the electric device A is equal to the voltage V _x applied to the electric device B.

The synthesized current waveform I _c is stored in advance in a database. The current measurement unit 811 measures the current flowing through the distribution board, and the identification waveform acquisition unit 813 generates an identification waveform by dividing the measured current waveform by a desired period. Next, it is determined in the determination unit 815, and the generated identification waveform, whether pre and current stored in the database waveform I _c matches. When they match, the display unit 816 can display the identification information of the electric devices A and B as the information of the electric devices connected to the distribution board.

Z, Z _A , Z _B , Z _C , Z ′, Z ′ _A , Z ′ _B , Z ′ _C , Z ₉ Load 1, 1A, 1B, 1C, 1 ′, 1′A, 1′B, 1 ′ C, 11, 12, 12A, 12B Power source 2, 21, 22 Distribution board 3A, 3B, 3C, 3'A, 3'B, 3'C, 31A, 31B, 31C, 32A, 32B, 32C Wiring 4, 4 ', 9 Electrical equipment 5A, 5B Current sensor 6 Voltage sensor 7 A / D converter 8, 10 Electrical equipment identification device 81, 91, 121 Server 82 Database 811 Current measurement section 812 Voltage measurement section 813 Identification waveform acquisition section 814 Alignment Waveform generation unit 815 determination unit 816 display unit 911 current estimation unit 1211 high frequency extraction unit 1212 spectrum generation unit 1213 peak frequency generation unit

Claims (6)

A method using an apparatus for identifying an electric product connected to two wires to be fed, wherein the apparatus stores first waveform data and second waveform data for identifying the electric product in advance. With a database,
Measuring a first current flowing in a first wiring out of the two wirings and measuring a second current flowing in a second wiring out of the two wirings;
Measuring a line voltage applied between the first wiring and the second wiring;
Based on the phase of the measured line voltage, a first identification waveform for a desired period is obtained from the measured first current, and a first period for the period is obtained from the measured second current. Obtaining two identification waveforms;
Arranging the first identification waveform and the second identification waveform in a predetermined order to generate an alignment waveform;
It is determined whether or not the waveform data corresponding to the first identification waveform in the alignment waveform matches the first waveform data, and the waveform corresponding to the second identification waveform in the alignment waveform is determined. Determining whether the data and the second waveform data match; and
When the waveform data corresponding to the first identification waveform matches the first waveform data, and the waveform data corresponding to the second identification waveform matches the second waveform data, the Displaying the identification information of the electrical product associated with the first waveform data and the second waveform data. The electrical product is powered by three-phase three-wire,
The method of claim 1, wherein the first wiring is a first phase line, and the second wiring is a second phase line. The electrical product is powered by single-phase two-wire,
The method according to claim 1, wherein the first wiring is a voltage line, and the second wiring is a neutral line. The electrical product is powered by single-phase three-wire,
The method of claim 1, wherein the first wiring is a first phase line, and the second wiring is a second phase line. The apparatus further comprises a high pass filter,
Passing the measured first current through the high pass filter to extract a first high frequency component and passing the measured second current through the high pass filter to extract a second high frequency component;
Spectrumizing the first high-frequency component and the second high-frequency component, respectively;
Generating a first peak frequency from the spectralized first high-frequency component and generating a second peak frequency from the spectralized second high-frequency component;
In the obtaining step, a third identification waveform for a desired period is obtained from the first peak frequency on the basis of the phase of the measured line voltage, and the period is obtained from the second peak frequency. A fourth identification waveform of
In the generating step, arranging the third identification waveform and the fourth identification waveform in a predetermined order to generate a second alignment waveform;
In the determining step, it is determined whether data of a waveform corresponding to the third identification waveform in the second alignment waveform matches the first waveform data, and the second alignment waveform Determining whether the waveform data corresponding to the fourth identification waveform matches the second waveform data;
In the displaying step, the waveform data corresponding to the third identification waveform matches the first waveform data, and the waveform data corresponding to the fourth identification waveform is the second waveform data. 5. The identification information of the electric product associated with the first waveform data and the second waveform data is displayed when the first waveform data and the second waveform data match. 5. the method of. An apparatus for identifying an electrical product connected to two wires to be fed, comprising a database in which first waveform data and second waveform data for identifying the electrical product are stored in advance,
A first measuring unit that measures a first current flowing in a first wiring out of the two wirings, and measures a second current flowing in a second wiring out of the two wirings;
A second measuring unit that measures a line voltage applied between the first wiring and the second wiring;
Based on the phase of the measured line voltage, a first identification waveform for a desired period is obtained from the measured first current, and a first period for the period is obtained from the measured second current. An acquisition unit for acquiring two identification waveforms;
A generator configured to arrange the first identification waveform and the second identification waveform according to a predetermined order to generate an alignment waveform;
It is determined whether or not the waveform data corresponding to the first identification waveform in the alignment waveform matches the first waveform data, and the waveform corresponding to the second identification waveform in the alignment waveform is determined. A determination unit for determining whether or not the data and the second waveform data match;
When the waveform data corresponding to the first identification waveform matches the first waveform data, and the waveform data corresponding to the second identification waveform matches the second waveform data, the An apparatus comprising: a display unit configured to display identification information of an electrical product associated with the first waveform data and the second waveform data.