JP2021081398A - Abnormality detection system, distribution board, abnormality detection method, and program - Google Patents

Abstract

To provide an abnormality detection system, a distribution board, an abnormality detection method, and a program capable of easily detecting wiring abnormality.SOLUTION: An abnormality detection system 100 includes an acquisition unit 711 and a detection unit 712. The acquisition unit 711 acquires voltage information relevant to a voltage applied to a circuit C1 connected to the distribution board 1. The detection unit 712 detects a wiring abnormality of a wiring C11 in the circuit C1 based on the voltage information acquired by the acquisition unit 711. The detection unit 712 has multiple determination functions including a first determination function and a second determination function. The first determination function is a function to determine a wiring abnormality has occurred when the voltage information exceeds a threshold value. The second determination function is a function to determine whether or not a wiring abnormality has occurred using a determination method different from the first determination function. The detection unit 712 detects a wiring abnormality using any one determination function out of the multiple determination functions depending on a predetermined trigger.SELECTED DRAWING: Figure 1

Description

The present disclosure generally relates to anomaly detection systems, distribution boards, anomaly detection methods, and programs. More specifically, the present disclosure relates to an abnormality detection system, a distribution board, an abnormality detection method, and a program for detecting an abnormality in wiring included in a circuit connected to a distribution board.

Patent Document 1 discloses a distribution board in which a main switch and a plurality of branch switches are housed as internal units inside the cabinet. The main switch and the branch switch each have an earth leakage protection function. When the earth leakage protection function of the main switch and the branch switch detects the earth leakage, the contact part is forcibly opened to protect the circuit.

JP-A-2017-107833

An object of the present disclosure is to provide an abnormality detection system, a distribution board, an abnormality detection method, and a program that facilitates detection of wiring abnormalities.

The abnormality detection system according to one aspect of the present disclosure includes an acquisition unit and a detection unit. The acquisition unit acquires voltage information regarding a voltage applied to a circuit connected to a distribution board. The detection unit detects a wiring abnormality of the wiring in the circuit based on the voltage information acquired by the acquisition unit. The detection unit has a plurality of determination functions including a first determination function and a second determination function. The first determination function is a function of determining that the wiring abnormality has occurred when the voltage information exceeds a threshold value. The second determination function is a function for determining whether or not the wiring abnormality has occurred by a determination method different from the first determination function. The detection unit detects the wiring abnormality by any one of the plurality of determination functions in response to a predetermined trigger.

The distribution board according to one aspect of the present disclosure includes the above-mentioned abnormality detection system and a distribution board cabinet accommodating the abnormality detection system.

The abnormality detection method according to one aspect of the present disclosure includes an acquisition step and a detection step. The acquisition step is a step of acquiring voltage information regarding a voltage applied to a circuit connected to a distribution board. The detection step is a step of detecting a wiring abnormality of the wiring in the circuit based on the voltage information acquired in the acquisition step. The detection step has a plurality of determination steps including a first determination step and a second determination step. The first determination step is a step of determining that the wiring abnormality has occurred when the voltage information exceeds the threshold value. The second determination step is a step of determining whether or not the wiring abnormality has occurred by a determination method different from that of the first determination step. The detection step detects the wiring abnormality in any one of the plurality of determination steps in response to a predetermined trigger.

The program according to one aspect of the present disclosure causes one or more processors to execute the above-mentioned abnormality detection method.

The present disclosure has an advantage that it is easy to detect a wiring abnormality of the wiring.

FIG. 1 is an explanatory diagram showing a schematic configuration of an abnormality detection system according to an embodiment of the present disclosure and a distribution board in which the abnormality detection system is used. FIG. 2 is an explanatory view of the same distribution board as seen from the front with the lid and the cover removed. FIG. 3 is an explanatory diagram of an example of the first determination function included in the detection unit of the above-mentioned abnormality detection system. FIG. 4 is an explanatory diagram of an example of the second determination function included in the detection unit of the above-mentioned abnormality detection system. FIG. 5 is an explanatory diagram of an example of the second determination function included in the detection unit of the above-mentioned abnormality detection system. FIG. 6 is an explanatory diagram of an example of the second determination function included in the detection unit of the above-mentioned abnormality detection system. FIG. 7 is a correlation diagram between the current flowing through the circuit referred to in the cutoff control unit of the above-mentioned abnormality detection system and the voltage applied to the circuit. FIG. 8 is a flowchart illustrating the operation of the above-mentioned abnormality detection system. FIG. 9 is an explanatory diagram of another example of the first determination function included in the detection unit of the above-mentioned abnormality detection system.

(1) Outline As shown in FIG. 1, the abnormality detection system 100 of the present embodiment is used to detect a wiring abnormality of the wiring C11 included in the circuit C1 connected to the distribution board 1. The abnormality detection system 100 includes an acquisition unit 711 and a detection unit 712. In the present embodiment, the component of the abnormality detection system 100 is included in the monitoring unit 7 (described later) arranged inside the distribution board 1.

The acquisition unit 711 acquires voltage information regarding the voltage applied to the circuit C1 connected to the distribution board 1. The "circuit connected to the distribution board" referred to in the present disclosure may include a main breaker 3, a branch breaker 4, a seismic breaker 5, and an interconnection breaker 6 installed inside the distribution board 1. Further, the "circuit connected to the distribution board" referred to in the present disclosure is directly connected to the outlet 22 or the electric device 24 electrically connected to the secondary side of the branch breaker 4 or the secondary side of the branch breaker 4. It may include an electrical device 23 that is electrically connected. Further, the "circuit connected to the distribution board" referred to in the present disclosure may include a distributed power source 21 electrically connected to the secondary side of the interconnection breaker 6. In the following, when the main breaker 3, the branch breaker 4, the seismic breaker 5, and the interconnection breaker 6 are not particularly distinguished, they are referred to as “switch 2”. In the present embodiment, the voltage information is information on the secondary side voltage of the main breaker 3 obtained by measuring using a voltage measuring device in the circuit on the secondary side of the main breaker 3.

The detection unit 712 detects a wiring abnormality of the wiring C11 in the circuit C1 based on the voltage information acquired by the acquisition unit 711. The "wiring abnormality" referred to in the present disclosure may include an abnormality such as insulation deterioration or half-breakage in the wiring C11 included in the circuit C1. The "half-break" in the present disclosure means a state in which the wire is about to be broken. Specifically, if the wiring C11 is a stranded wire, a part of the wires constituting the stranded wire is a part of the wire. The wire is broken.

As an example, the wiring abnormality may include that when the wiring C11 is composed of a pair of electric wires, an arc (so-called parallel arc) is generated due to a short circuit between the pair of electric wires. The parallel arc can occur, for example, when the wiring C11 is caught on the edge of an object (for example, furniture) in the facility 500 and the coating is damaged, or when the wiring C11 is sandwiched between metal members such as staples. .. Further, the parallel arc may occur, for example, when an overcurrent flows through the wiring C11 to melt the coating, or when an animal bites the wiring C11. In addition, the parallel arc may occur when the wiring C11 is deteriorated by being continuously exposed to ultraviolet rays for a long period of time.

Further, as an example, the wiring abnormality may include that when the wiring C11 is composed of a pair of electric wires, an arc (so-called series arc) is generated when one of the pair of electric wires is half-broken. The series arc can occur, for example, by repeatedly bending the wiring C11 or pulling the wiring C11 with an excessive force.

The detection unit 712 has a plurality of determination functions including a first determination function and a second determination function.

The first determination function is a function of determining that a wiring abnormality has occurred when the voltage information exceeds the threshold Th1 (see FIG. 3). In the present embodiment, in the first determination function, the detection unit 712 determines whether or not a wiring abnormality has occurred in the wiring C11 depending on whether or not the voltage value related to the secondary side voltage of the main breaker 3 exceeds the threshold value Th1. judge.

The second determination function is a function for determining whether or not a wiring abnormality has occurred by a determination method different from the first determination function. That is, in the second determination function, the detection unit 712 determines whether or not a wiring abnormality has occurred in the wiring C11 by a method other than the method of comparing the secondary side voltage of the main breaker 3 with the threshold value Th1.

Then, the detection unit 712 detects the wiring abnormality by any one of the plurality of determination functions in response to a predetermined trigger. As an example, the "predetermined trigger" referred to in the present disclosure is that the monitoring unit 7 receives a predetermined operation input by the user of the distribution board 1. For example, the detection unit 712 detects a wiring abnormality of the wiring C11 by a determination function of any one of the first determination function and the second determination function in response to a predetermined operation input by the user.

As described above, in the present embodiment, the detection unit 712 has a plurality of determination functions including the second determination function in addition to the first determination function. Therefore, even if the first determination function cannot determine the occurrence of the wiring abnormality of the wiring C11, the detection unit 712 may determine the occurrence of the wiring abnormality of the wiring C11 by the second determination function. There is. Therefore, in the present embodiment, the wiring abnormality of the wiring C11 is detected as compared with the mode of determining whether or not the wiring abnormality of the wiring C11 has occurred only by a single function (here, the first determination function). It has the advantage of being easy.

(2) Details Hereinafter, the abnormality detection system 100 of the present embodiment and the distribution board 1 including the abnormality detection system 100 will be described in detail with reference to FIGS. 1 and 2.

The distribution board cabinet 10 (see FIG. 2) of the distribution board 1 is installed and used in a facility 500 such as a dwelling unit of a detached house or an apartment house, for example. The facility 500 in which the distribution board 1 is installed is not limited to each dwelling unit of a detached house or an apartment house, but is installed in a non-residential building (for example, a factory, a commercial building, an office building, a hospital, a school, etc.). May be done.

In the following description, unless otherwise specified, the X-axis direction is defined as the left-right direction and the Z-axis direction is defined as the vertical direction in FIG. Further, the directions orthogonal to the X-axis direction and the Z-axis direction are defined as the front-rear direction. Further, the positive direction in the X-axis direction is defined as the right side, and the positive direction in the Z-axis direction is defined as the upper side. However, these directions are examples, and are not intended to limit the directions when the distribution board cabinet 10 and the distribution board 1 are used. In addition, the arrows indicating each direction in the drawing are shown only for the sake of explanation, and are not accompanied by an entity.

(2.1) Distribution board First, the distribution board 1 will be described. As shown in FIG. 1, the distribution board 1 includes an abnormality detection system 100 and a distribution board cabinet 10 for accommodating the abnormality detection system 100. As shown in FIG. 2, the distribution board cabinet 10 accommodates a main breaker 3, a plurality of switches 2, a monitoring unit 7, a current measuring device 8, and a backup power supply 9 (see FIG. 1). To do. Here, the switch 2 includes a plurality of branch breakers 4, a seismic breaker 5, and an interconnection breaker 6. It is not essential that the distribution board cabinet 10 accommodates the monitoring unit 7, the current measuring device 8, and the backup power supply 9, and at least a part of the monitoring unit 7, the current measuring device 8, and the backup power supply 9 is divided. It may be outside the electric board cabinet 10.

The distribution board cabinet 10 includes a box-shaped body 11 (see FIG. 2) having an open front surface and a cover that closes the opening of the body 11. In FIG. 2, the cover is not shown. The distribution board cabinet 10 is attached to a member constituting the building, for example, a wall 110 of the building (see FIG. 2). The distribution board cabinet 10 may be mounted in a state where a part or the whole is embedded in a mounting hole provided in the wall 110. The distribution board cabinet 10 is provided, for example, at a height position that is out of reach of children of average height and can be operated by adults of average height. Be done.

Further, the distribution board cabinet 10 further includes a lid that covers the front surface of the cover with the distribution board cabinet 10 attached to the wall 110. The lid is attached to the cover so that it can be moved between the closed and open positions. The closed position is a position that covers the front surface of the cover. The open position is a position that does not cover at least a part of the front surface of the cover. The lid may cover a part of the front surface of the cover when the cover is viewed from a certain direction. In the present embodiment, the lid in the closed position covers the cover when the cover is viewed from the front. It covers almost the entire front of the.

As shown in FIG. 2, the distribution board cabinet 10 houses a main breaker 3, a plurality of branch breakers 4, a seismic breaker 5, an interconnection breaker 6, a monitoring unit 7, and a current measuring device 8. ing. The main circuit breaker 3, the plurality of branch breakers 4, the seismic circuit breaker 5, the interconnection breaker 6, the monitoring unit 7, and the current measuring device 8 are attached to the body 11 directly or via mounting parts or the like. FIG. 2 shows the arrangement of the main breaker 3, the plurality of branch breakers 4, the seismic breaker 5, the interconnection breaker 6, the monitoring unit 7, and the current measuring device 8 inside the distribution board cabinet 10. These arrangements are examples and can be changed as appropriate. Further, although the backup power supply 9 is not shown in FIG. 2, the backup power supply 9 may be arranged at an appropriate position inside the distribution board cabinet 10.

The main breaker 3 is arranged inside the distribution board cabinet 10 at a position slightly to the left of the center in the left-right direction. The position of the main breaker 3 inside the distribution board cabinet 10 may be another position, for example, on the right side of the center. The main breaker 3 includes a contact 31 (see FIG. 1) electrically connected between the primary side terminal and the secondary side terminal. The main breaker 3 is provided with an operating lever on the front surface for turning the contact 31 on or off. Further, the main breaker 3 includes, for example, a detection unit 32 (see FIG. 1) that detects an abnormal state in which an electric leakage current flows through the contact 31. The main circuit breaker 3 opens the contact 31 when the detection unit 32 detects an abnormal state in which an electric leakage current flows through the contact 31. As a result, the main breaker 3 cuts off the power supply to the circuit on the secondary side of the main breaker 3 and protects the circuit. Further, the main circuit breaker 3 opens the contact 31 when the detection unit 32 detects an overcurrent such as a short-circuit current or an overload current. Further, the detection unit 32 of the main circuit breaker 3 has a function of detecting the open phase state of the neutral wire in the single-phase three-wire wiring. Then, when the detection unit 32 detects the open phase state of the neutral line, the main circuit breaker 3 opens the contact 31. The main breaker 3 may have a limiter function that opens the contact 31 when a current exceeding a predetermined limit value flows.

The secondary terminals of the main breaker 3 are the conductive bar of the first voltage pole (L1 phase), the conductive bar of the second voltage pole (L2 phase), and the neutral pole (N phase) in the single-phase three-wire wiring. Conductive bars are connected. Each conductive bar is formed by a conductive member in the shape of a long plate long in the left-right direction, and is arranged in the center of the distribution board cabinet 10 in the vertical direction and at a position on the right side of the main breaker 3. There is.

The plurality of branch breakers 4 are divided into upper and lower sides of each conductive bar, and a plurality of each of the branch breakers 4 are arranged so as to be arranged in the left-right direction. In the present embodiment, as shown in FIG. 2, 12 branch breakers 4 are arranged so as to be arranged in the left-right direction on the upper side of each conductive bar. Further, on the lower side of each conductive bar, 11 branch breakers 4 are arranged so as to be arranged in the left-right direction.

Each branch breaker 4 includes a pair of primary side terminals and a pair of secondary side terminals. Each branch breaker 4 has a contact that is electrically connected between the primary side terminal and the secondary side terminal. On the front surface of each branch breaker 4, an operation lever for turning on or off the contact built in each branch breaker 4 is provided.

The branch breaker 4 is available for 100V and 200V. The pair of primary side terminals included in the branch breaker 4 for 100V are electrically connected to one of the conductive bar of the first voltage pole and the conductive bar of the second voltage pole and the conductive bar of the neutral pole, respectively. To. The pair of primary side terminals included in the branch breaker 4 for 200V are electrically connected to the conductive bar of the first voltage pole and the conductive bar of the second voltage pole, respectively. Further, the corresponding wiring C11 is electrically connected to the secondary side terminal of the branch breaker 4. The wiring C11 connected to the secondary terminal of each branch breaker 4 includes, for example, an electric device 23 such as a lighting fixture and a hot water supply facility, an outlet 22 (see FIG. 1), or a wiring fixture such as a wall switch as a load. The above is connected. Therefore, the distribution board 1 is an electric device 23 connected to the secondary terminal of the branch breaker 4 via the wiring C11, an electric device 24 connected to the outlet 22 (for example, an air conditioner, a television receiver, etc.), or the like. Can be powered.

Further, the branch breaker 4 is provided with a detection unit 41 (see FIG. 1) for detecting an abnormal state in which an overcurrent such as a short-circuit current or an overload current flows through a contact built in the branch breaker 4. When the detection unit 41 detects an abnormal state in which an overcurrent flows through the contact, the branch breaker 4 opens the contact. As a result, the branch breaker 4 cuts off the power supply to the circuit on the secondary side of the branch breaker 4 to protect the circuit. Further, the detection unit 41 has a function of detecting an electric leakage state of the wiring C11 connected to the branch breaker 4. Then, when the detection unit 41 detects the occurrence of electric leakage, the branch breaker 4 opens the contacts.

The seismic circuit breaker 5 is arranged below the conductive bar so as to be aligned with the branch breaker 4 in the left-right direction. The seismic circuit breaker 5 has a seismic sensor 51 that detects vibration applied to the distribution board cabinet 10. When the seismic sensor 51 detects a vibration having a magnitude exceeding a predetermined reference value (for example, a seismic motion having a seismic intensity of 5), the seismic breaker 5 performs a breaking operation of breaking the circuit. The seismic circuit breaker 5 generates a pseudo electric leakage state by electrically connecting, for example, between the first voltage pole or the second voltage pole and the neutral pole via an impedance element having a relatively low resistance. When the seismic circuit breaker 5 generates a pseudo electric leakage state, the detection unit 32 of the main breaker 3 detects the pseudo electric leakage state generated by the seismic breaker 5, and the main breaker 3 opens the contact 31. Let me. As a result, when vibration of a magnitude exceeding the reference value is applied to the distribution board cabinet 10 due to an earthquake or the like, the power supply to the circuit connected to the secondary side of the main breaker 3 can be cut off.

A distributed power source 21 provided in the facility 500 is connected to the interconnection breaker 6. The interconnection breaker 6 is electrically connected between the conductive bar electrically connected to the secondary terminal of the main breaker 3 and the distributed power source 21. When the contact of the interconnection breaker 6 is turned on, the distributed power supply 21 can be interconnected with the grid power supply 20 to supply power to the load. On the other hand, when the contact of the interconnection breaker 6 is turned off, the distributed power source 21 is disconnected from the system power supply 20. The interconnection breaker 6 has, for example, a detection function for detecting the occurrence of an electric leakage. When the detection function of the interconnection breaker 6 detects the occurrence of an electric leakage, the interconnection breaker 6 shuts off and disconnects the distributed power supply 21 from the grid power supply 20. The interconnection breaker 6 may have a detection function for detecting an overcurrent such as a short-circuit current, and when the detection function of the interconnection breaker 6 detects an overcurrent, the interconnection breaker 6 performs a cutoff operation. It may be configured in.

The current measuring device 8 is configured to measure the current flowing through the loads (electrical devices 23, 24, etc.) connected to each of the plurality of branch breakers 4. The current measuring device 8 includes, for example, a substrate and a plurality of coils. The substrate has a long plate shape in the left-right direction. A plurality of holes are formed in the substrate. Terminals extending from the conductive bar and connected to the primary terminal of the branch breaker 4 are inserted into the plurality of holes. The coil is, for example, a logoski coil, which is formed around a hole in the substrate. In the present embodiment, the current measuring device 8 measures the current flowing through each of the plurality of branch breakers 4 and the interconnection breaker 6. Here, the current measuring device 8 (current sensor) is shared with the sensor used in the energy management system that manages the energy used in the facility 500 in which the distribution board 1 is installed. The current measuring device 8 is not limited to a mode having a logo ski coil, and is, for example, a mode having a current transformer (current transformer), a Hall element, a magnetic resistance element such as a GMR (Giant Magnetic Resistances) element, and a sensor such as a shunt resistance. It may be.

The backup power supply 9 includes a battery 91 which is a secondary battery such as a nickel hydrogen battery or a lithium ion battery, and a charging circuit for charging the battery 91. The charging circuit of the backup power supply 9 receives power from the primary side of the main breaker 3 to charge the battery 91. The backup power supply 9 supplies power to the monitoring unit 7 and the like using the battery 91 as a power source when the system power supply 20 has a power failure. Therefore, even if the system power supply 20 has a power failure, the monitoring unit 7 can operate by receiving power supplied from the backup power supply 9. When the system power supply 20 is normal, the monitoring unit 7 operates by receiving power supply from the primary side (system power supply 20) of the main breaker 3.

Here, the switch 2 further includes a communication unit 201. The communication unit 201 is configured to be able to communicate with the first communication unit 72 (described later) of the monitoring unit 7. The communication unit 201 sends and receives signals to and from the monitoring unit 7 directly or indirectly via a network or a repeater or the like by an appropriate communication method of wired communication or wireless communication. Here, a unique address is set for each of the plurality of switches 2. That is, the communication unit 201 communicates with the monitoring unit 7 using the address set in the switch 2 (the address stored in the memory or the like).

In the present embodiment, the communication unit 201 and the monitoring unit 7 can communicate with each other in both directions, transmit a signal from the communication unit 201 to the monitoring unit 7, and transmit a signal from the monitoring unit 7 to the communication unit 201. Both transmissions are possible.

Further, in the present embodiment, the communication unit 201 uses the substrate of the current measuring device 8 as at least a part of the communication path between the current measuring device 8 and the monitoring unit 7. In other words, the conductive layer of the substrate constitutes a part of the communication path between the communication unit 201 and the monitoring unit 7. As the communication method between the communication unit 201 and the board, for example, wired communication conforming to a communication standard such as RS-485 or a wired LAN can be appropriately adopted.

(2.2) Anomaly Detection System Next, the anomaly detection system 100 will be described with reference to FIG. In the present embodiment, as already described, the components of the abnormality detection system 100 are included in the monitoring unit 7. Therefore, the abnormality detection system 100 will be described below together with the description of the monitoring unit 7.

The monitoring unit 7 is arranged on the left side of the main breaker 3 inside the distribution board cabinet 10. Since the monitoring unit 7 operates by receiving power supplied from the primary side of the main breaker 3, it can operate even when the main breaker 3 shuts off. When the system power supply 20 has a power failure, the monitoring unit 7 receives power from the backup power supply 9, so that the monitoring unit 7 can operate even when the system power supply 20 has a power failure.

More specifically, the monitoring unit 7 of the present embodiment includes a control unit 71, a first communication unit 72, a second communication unit 73, and a storage unit 74.

The first communication unit 72 communicates with the controller 25 or the like installed in the facility 500. The controller 25 controls or monitors a device compatible with the HEMS (Home Energy Management System) (hereinafter referred to as a HEMS compatible device). That is, the controller 25 can acquire the instantaneous power and the electric energy of each of the plurality of loads (electrical devices 23, 24, etc.) connected to the plurality of branch breakers 4 by communicating with the monitoring unit 7. It can control or monitor HEMS-compatible devices. The controller 25 is arranged outside the distribution board cabinet 10. Here, the HEMS-compatible device includes, for example, a smart meter, a photovoltaic power generation device, a power storage device, a fuel cell, an electric vehicle, an air conditioner, a lighting device, a hot water supply device, a refrigerator, a TV receiver, and the like. The HEMS compatible device is not limited to these devices.

The communication method between the first communication unit 72 and the controller 25 is, for example, a 920 MHz band specific low power radio station (a radio station that does not require a license), Wi-Fi (registered trademark), Bluetooth (registered trademark), or the like. It is a wireless communication using radio waves as a medium, which conforms to the communication standard of. The communication method between the first communication unit 72 and the controller 25 may be wired communication conforming to a communication standard such as a wired LAN (Local Area Network). The communication protocol for communication between the first communication unit 72 and the controller 25 is, for example, Ethernet (registered trademark), ECHONET Lite (registered trademark), or the like.

Further, as described above, the first communication unit 72 communicates with the communication unit 201 of each switch 2 by using a part of the conductive layer of the substrate of the current measuring device 8.

The second communication unit 73 has a communication function of communicating with the management server 300 and the information terminal 400 via a wide area network 200 such as the Internet. Here, the information terminal 400 is, for example, a terminal carried by the user of the distribution board 1, for example, a smartphone or a tablet-type computer. Further, the information terminal 400 may be, for example, a desktop type personal computer or a laptop type personal computer.

The storage unit 74 includes, for example, an electrically rewritable non-volatile memory such as EEPROM (Electrically Erasable Programmable Read-Only Memory), a volatile memory such as RAM (Random Access Memory), and the like. The storage unit 74 stores the detection result of the detection unit 712 when a wiring abnormality occurs in the wiring C11.

The control unit 71 includes, for example, a computer system. The main configuration of a computer system is a processor and memory as hardware. When the processor executes the program recorded in the memory of the computer system, the function as the control unit 71 is realized. The program may be pre-recorded in the memory of the computer system, may be provided through a telecommunications line, and may be recorded on a non-temporary recording medium such as a memory card, optical disk, or hard disk drive that can be read by the computer system. May be provided.

The control unit 71 has the functions of the acquisition unit 711, the detection unit 712, the output unit 713, and the cutoff control unit 714.

The acquisition unit 711 measures the power passing through at least one of the main breaker 3 and the branch breaker 4 in the distribution board 1. The monitoring unit 7 of the present embodiment is electrically connected to a main current measuring device for measuring the current flowing through the main breaker 3 and a current measuring device 8. Here, the main current measuring device includes, for example, a current sensor including a current transformer (CT). The acquisition unit 711 receives from the current measuring device 8 the current value flowing through each of the plurality of branch breakers 4 and the interconnection breaker 6 measured by the current measuring device 8. That is, the acquisition unit 711 acquires current information regarding the current flowing through each of the plurality of circuits C1 connected to the distribution board 1. Further, the acquisition unit 711 receives the current value measured by the main current measuring device from the main current measuring device. The acquisition unit 711 converts each of the current values measured by the current measuring device 8 and the main current measuring device into a power value (instantaneous power value). Further, the acquisition unit 711 has a function of calculating the data of the electric energy obtained by integrating the collected instantaneous power data over a predetermined time.

Further, in the present embodiment, the acquisition unit 711 is the line voltage between the first voltage pole and the neutral pole, and the second voltage pole and the middle, which are measured by the voltage measuring device in the circuit on the secondary side of the main breaker 3. The line voltage between the sex pole and the line voltage between the first voltage pole and the second voltage pole are received from the voltage measuring device. That is, the acquisition unit 711 obtains voltage information regarding the voltage applied to the circuit C1 connected to the distribution board 1 (voltage value of the voltage applied between the two poles in the circuit on the secondary side of the main breaker 3). get.

The detection unit 712 detects a wiring abnormality in the wiring C11 included in the circuit C1 connected to the distribution board 1. The detection unit 712 detects a wiring abnormality of the wiring C11 included in any of the circuits C1 based on the voltage information regarding the voltage applied to the circuit C1 acquired by the acquisition unit 711. The detection result regarding the wiring abnormality of the wiring C11 detected by the detection unit 712 is stored in the storage unit 74.

In the present embodiment, the detection unit 712 can detect the occurrence of an arc as a wiring abnormality of the wiring C11. Specifically, the detection unit 712 can determine whether or not an arc is generated in the wiring C11 by the same technique as the arc fault circuit breaker (AFCI). That is, the arc short-circuit protection circuit breaker can recognize the current characteristic and the voltage characteristic peculiar to the arc generated in the wiring C11 by using an electronic circuit, and can detect the arc generated in the wiring C11. By the same principle as this, the detection unit 712 can determine whether or not an arc is generated in the wiring C11.

Here, in the present embodiment, the detection unit 712 has a plurality of determination functions including a first determination function and a second determination function. Then, the detection unit 712 detects the wiring abnormality by the determination function of any one of the plurality of determination functions in response to the operation input by the user as a predetermined trigger. In the present embodiment, for example, the determination function used by the detection unit 712 can be switched by the user operating the operation unit (for example, a DIP switch) provided in the monitoring unit 7.

In the first determination function, the detection unit 712 compares the voltage information acquired by the acquisition unit 711 with the threshold value Th1 (see FIG. 3). Then, when the voltage information exceeds the threshold value Th1, the detection unit 712 determines that an arc has occurred in the wiring C11, that is, a wiring abnormality has occurred in the wiring C11. For example, a capacitor and a resistor are provided in the electric circuit connecting the first voltage pole and the second voltage pole, the electric circuit connecting the first voltage pole and the neutral pole, and the electric circuit connecting the second voltage pole and the neutral pole, respectively. CR circuits connected in series are connected in parallel. Then, when the voltage value of the voltage applied to both ends of the resistor exceeds the threshold value Th1 for each of these CR circuits, the detection unit 712 generates an arc in the wiring C11 connected to the corresponding CR circuit, that is, the wiring. It is determined that a wiring abnormality has occurred in C11. That is, the detection unit 712 determines that a wiring abnormality has occurred in the wiring C11 when high-frequency noise caused by the generation of an arc is generated in these electric circuits. Hereinafter, unless otherwise specified, the above voltage value is referred to as "voltage information".

In the second determination function, the detection unit 712 determines whether or not an arc has occurred in the wiring C11, that is, whether or not a wiring abnormality has occurred in the wiring C11, by a determination method different from that of the first determination function. The second determination function is listed below. In the present embodiment, the plurality of determination functions included in the detection unit 712 may include all the second determination functions listed below, or may include only a part of the second determination functions. Good. That is, the detection unit 712 may have at least a first determination function and one second determination function as a plurality of determination functions.

In the second determination function, the detection unit 712 may determine whether or not a wiring abnormality has occurred by comparing the voltage information with the plurality of threshold values Th2. For example, as shown in FIG. 4, the detection unit 712 compares the voltage information acquired by the acquisition unit 711 with a plurality of (here, three) threshold values Th2. The three threshold values Th2 are set to "first threshold value Th21", "second threshold value Th22", and "third threshold value Th23" in ascending order.

Then, the detection unit 712 makes different conditions for determining that a wiring abnormality has occurred in the wiring C11 for each threshold value Th2. For example, the detection unit 712 determines that a wiring abnormality has occurred in the wiring C11 when the number of times the voltage information exceeds the first threshold value Th21 exceeds 5 times in a predetermined time. Further, for example, when the voltage information exceeds the second threshold value Th22 more than twice in a predetermined time, the detection unit 712 determines that a wiring abnormality has occurred in the wiring C11. Further, for example, when the voltage information exceeds the third threshold value Th23 even once, the detection unit 712 determines that a wiring abnormality has occurred in the wiring C11.

Further, in the second determination function, the detection unit 712 may determine whether or not a wiring abnormality has occurred by comparing the threshold value Th2 different from the threshold value Th1 of the first determination function with the voltage information. For example, the detection unit 712 compares the voltage information acquired by the acquisition unit 711 with the threshold value Th2 as shown in FIG. The threshold value Th2 may be different from the threshold value Th1 of the first determination function, may be any one of the first threshold value Th21 to the third threshold value Th23, or may be a threshold value different from these threshold values. There may be. Then, when the voltage information exceeds the threshold value Th2, the detection unit 712 determines that a wiring abnormality has occurred in the wiring C11.

Further, in the second determination function, the detection unit 712 may determine whether or not a wiring abnormality has occurred depending on whether or not the number of times the threshold value Th1 of the first determination function has been exceeded exceeds the predetermined number of times in a predetermined time. Good. For example, the detection unit 712 determines that a wiring abnormality has occurred in the wiring C11 when the number of times the voltage information exceeds the threshold Th1 exceeds the predetermined number of times in the determination period (predetermined time) T1 (see FIG. 3). ..

Here, the determination period T1 for determining whether or not a wiring abnormality has occurred may be variable. The determination period T1 can be appropriately set by, for example, the user operating the monitoring unit 7. For example, as shown in FIG. 6, the detection unit 712 may determine whether or not a wiring abnormality occurs in the wiring C11 in the determination period T2 in which the determination period T1 is further extended. In this embodiment, even if the number of times the voltage information exceeds the threshold Th1 does not reach the predetermined number in the determination period T1, the detection unit 712 will perform the detection unit 712 if the number of times the voltage information exceeds the threshold Th1 reaches the predetermined number in the determination period T2. , It can be determined that a wiring abnormality has occurred in the wiring C11.

Further, in the second determination function, the detection unit 712 may determine whether or not a wiring abnormality has occurred depending on whether or not the integrated value of the voltage information exceeds the predetermined integrated value Th3. For example, as shown in FIG. 5, the detection unit 712 compares the integrated value of the voltage information acquired by the acquisition unit 711 with the predetermined integrated value Th3. In the example shown in FIG. 5, the instantaneous value of the voltage information is represented by a solid line, and the integrated value of the voltage information is represented by a alternate long and short dash line. The integrated value of the voltage information can be obtained by inputting the voltage information to an integrator circuit using an operational amplifier such as an operational amplifier, for example. Then, when the integrated value of the voltage information exceeds the predetermined integrated value Th3, the detection unit 712 determines that a wiring abnormality has occurred in the wiring C11.

The output unit 713 outputs according to the detection result of the detection unit 712. In the present embodiment, the output unit 713 executes a process of presenting a detection result regarding the wiring abnormality at least when a wiring abnormality of the wiring C11 occurs. For example, the output unit 713 displays a character string and / or an image on a display device (for example, a liquid crystal display or the like) provided in the monitoring unit 7 or a display device connected to the monitoring unit 7 to the user. The detection result is visually presented. Further, for example, the output unit 713 visually presents the detection result to the user by lighting a light source including a solid-state light emitting element such as an LED (Light Emitting Diode) provided in the monitoring unit 7. Further, for example, the output unit 713 audibly presents the detection result to the user by outputting a voice message from the speaker provided in the monitoring unit 7 or the speaker connected to the monitoring unit 7.

Further, the output unit 713 transmits the detection result of the detection unit 712 to the information terminal 400 owned by the user via the second communication unit 73. As an example, when the detection unit 712 detects a wiring abnormality of the wiring C11, the output unit 713 transmits a signal including the detection result to the information terminal 400 via the second communication unit 73. The user can know the detection result of the detection unit 712 by operating the information terminal 400, for example, by browsing an e-mail or starting an application for the monitoring system 100 installed in the information terminal 400. it can.

The cutoff control unit 714 outputs a control signal for controlling the circuit C1 to the circuit C1. That is, the cutoff control unit 714 can control each of the plurality of circuits C1. The "control of the circuit C1" as used in the present disclosure may include disconnecting the power supply to the circuit C1, restoring the circuit C1, limiting the current flowing through the circuit C1, and the like. As an example, the cutoff control unit 714 cuts off the power supply to the circuit C1 including the branch breaker 4 by outputting a control signal to the branch breaker 4 and opening a contact built in the branch breaker 4. Is possible.

In the present embodiment, the cutoff control unit 714 is connected to the circuit C1 including the wiring C11 in which the wiring abnormality is detected when the first cutoff condition that the wiring abnormality of the wiring C11 is detected by the detection unit 712 is satisfied. , Outputs a control signal for cutting off the power supply to the circuit C1. Here, if an arc is generated in the wiring C11, there is a possibility that an electric fire or the like may occur due to the generation of the arc. Therefore, in the present embodiment, when a wiring abnormality of the wiring C11 is detected, it is possible to prevent the occurrence of an electric fire by cutting off the power supply to the circuit C1.

Further, in the present embodiment, the cutoff control unit 714 can output a control signal to the circuit C1 including the wiring C11 in which the wiring abnormality is detected when the second cutoff condition shown below is satisfied. .. Which of the first blocking condition and the second blocking condition is adopted can be selected, for example, by the user operating the operation unit provided in the monitoring unit 7.

When determining whether or not the second cutoff condition is satisfied, the detection unit 712 refers not only to the voltage information but also to the current information. That is, the acquisition unit 711 further acquires current information regarding the current flowing through the circuit C1. Then, the detection unit 712 determines whether or not to shut off the circuit C1 in which the wiring abnormality is detected, based on the voltage information and the current information. Specifically, the detection unit 712 determines whether or not a wiring abnormality of the wiring C11 has occurred based on the voltage information. Then, the detection unit 712 determines that the second cutoff condition is satisfied when the current information exceeds the threshold current when it is determined that the wiring abnormality of the wiring C11 has occurred. Then, the cutoff control unit 714 outputs a control signal to the circuit C1 including the wiring C11 in which the wiring abnormality is detected. That is, when the cutoff control unit 714 detects a wiring abnormality in the detection unit 712 and the current flowing through the circuit C1 in which the wiring abnormality is detected exceeds the threshold current, the circuit breaker 4 to which the circuit C1 is connected is connected. Shut off.

Hereinafter, an example of control based on the second cutoff condition by the cutoff control unit 714 will be described with reference to FIG. 7. In the example shown in FIG. 7, the detection unit 712 satisfies the second cutoff condition based on the comparison between the two voltage thresholds Th41 and Th42 and the voltage information and the comparison between the two current thresholds Th51 and Th52 and the current information. Whether or not it is judged. Specifically, the detection unit 712 determines that the voltage information is normal if the voltage information is the voltage threshold value Th41 or less and the current information is the current threshold value Th51 or less (see the blank area in FIG. 7).

On the other hand, when the voltage information exceeds the voltage threshold Th42 or the current information exceeds the current threshold Th52 (see the shaded area in FIG. 7), the detection unit 712 determines that the second cutoff condition is satisfied. Further, the detection unit 712 determines that the second cutoff condition is satisfied even when the voltage information exceeds the voltage threshold value Th41 and the current information exceeds the current threshold value Th51 (see the shaded area in FIG. 7). That is, when the second shutoff condition is satisfied, the detection unit 712 determines that there is a risk of an electric fire.

In other cases (see the dot area of FIG. 7), the detection unit 712 causes the output unit 713 to present information for calling attention to the user in addition to the detection result regarding the wiring abnormality. That is, in this case, the detection unit 712 determines that the wiring abnormality has occurred in the wiring C11, but the risk of an electric fire is relatively low. In this case, since the power supply to the circuit C1 is not cut off by the cutoff control unit 714, the power supply to the circuit C1 where it is not preferable that the power supply to the lighting equipment, the refrigerator, the wine cellar, the lifesaving device, etc. is interrupted is maintained. Cheap.

Further, in the present embodiment, the interruption control unit 714 restores the interrupted circuit C1 and, when a plurality of target circuits C1 exist, restores the circuit C1 from the interrupted state as follows. That is, the cutoff control unit 714 restores the circuit C1 in which the flowing current or the passing power is smaller than a predetermined value from the cutoff state. For example, the cutoff control unit 714 restores the circuit C1 in which the current information acquired by the acquisition unit 711 is smaller than a predetermined value. As described above, in the present embodiment, the cutoff control unit 714 preferentially restores the circuit C1 from the cutoff state, which has a relatively low risk of the wiring abnormality of the wiring C11 occurring again.

In the present embodiment, power is supplied to the monitoring unit 7 from the primary side of the main breaker 3 even when the main breaker 3 shuts off. Therefore, the control unit 71 can operate when the system power supply 20 does not have a power failure. Further, power is supplied to the monitoring unit 7 from the backup power supply 9 in the event of a power failure of the system power supply 20. Therefore, the control unit 71 can operate even when the system power supply 20 has a power failure. In the present embodiment, the backup power supply 9 is provided outside the monitoring unit 7, but the backup power supply 9 may be built in the monitoring unit 7.

(3) Operation Hereinafter, the operation of the abnormality detection system 100 of the present embodiment will be described with reference to FIG. In the following, the detection unit 712 includes, as a plurality of determination functions, a first determination function, a second determination function of one of the plurality of second determination functions described in "(2.2) Anomaly detection system", and the like. Suppose you have. Further, in the following, it is assumed that the cutoff control unit 714 cuts off the power supply to the circuit C1 when the first cutoff condition is satisfied.

First, the acquisition unit 711 periodically acquires voltage information by periodically receiving the measured value from the voltage measuring device (S1). The period for acquiring voltage information is, for example, several ms. The process S1 corresponds to the acquisition step ST1 described later.

Next, when the first determination function is adopted (S2: Yes), the detection unit 712 determines that a wiring abnormality has occurred in the wiring C11 when the first determination condition is satisfied (S3: Yes). (S5). The first determination condition is that the voltage information exceeds the threshold Th1. On the other hand, when the second determination function is adopted (S4: Yes), the detection unit 712 determines that a wiring abnormality has occurred in the wiring C11 when the second determination condition is satisfied (S4: Yes) (S4: Yes). S5). The second determination condition here is that the number of times the voltage information exceeds the threshold Th1 exceeds a predetermined number of times. The process S3 corresponds to the first determination step ST31 of the detection step ST2 described later, the process S4 corresponds to the second determination step ST32 of the detection step ST2 described later, and the process S5 is included in the detection step ST2 described later.

When the detection unit 712 detects the occurrence of a wiring abnormality in the wiring C11, the cutoff control unit 714 outputs a control signal to the circuit C1 including the wiring C11 in which the wiring abnormality is detected, thereby transmitting the control signal to the circuit C1. The power supply is cut off (S6). Then, the output unit 713 executes a process of presenting a detection result regarding the wiring abnormality of the wiring C11 (S7).

As described above, in the present embodiment, the detection unit 712 has a plurality of determination functions including the second determination function in addition to the first determination function. Therefore, even if the first determination function cannot determine the occurrence of the wiring abnormality of the wiring C11, the detection unit 712 may determine the occurrence of the wiring abnormality of the wiring C11 by the second determination function. There is. For example, even if the high frequency component associated with the generation of the arc superimposed on the voltage applied to the circuit C1 is so small that it cannot be determined by the first determination function, it can be determined by the second determination function. In some cases. Further, for example, even if noise is mixed in the voltage applied to the circuit C1 to the extent that the first determination function cannot determine, the second determination function may be able to determine.

Therefore, in the present embodiment, the wiring abnormality of the wiring C11 is detected as compared with the mode of determining whether or not the wiring abnormality of the wiring C11 has occurred only by a single function (here, the first determination function). It has the advantage of being easy.

(4) Modified Example The above-described embodiment is only one of the various embodiments of the present disclosure. The above-described embodiment can be changed in various ways depending on the design and the like as long as the object of the present disclosure can be achieved. Further, the function equivalent to that of the abnormality detection system 100 may be realized by an abnormality detection method, a (computer) program, a non-temporary recording medium on which the program is recorded, or the like.

The abnormality detection method according to one aspect includes acquisition step ST1 and detection step ST2. The acquisition step ST1 is a step of acquiring voltage information regarding the voltage applied to the circuit C1 connected to the distribution board 1. The detection step ST2 is a step of detecting a wiring abnormality of the wiring C11 in the circuit C1 based on the voltage information acquired in the acquisition step ST1. The detection step ST2 has a plurality of determination steps including a first determination step ST31 and a second determination step ST32. The first determination step ST31 is a step of determining that a wiring abnormality has occurred when the voltage information exceeds the threshold Th1. The second determination step ST32 is a step of determining whether or not a wiring abnormality has occurred by a determination method different from that of the first determination step ST31. The detection step ST2 detects a wiring abnormality in any one of the plurality of determination steps in response to a predetermined trigger. Further, the program according to one aspect causes one or more processors to execute the above-mentioned abnormality detection method.

Hereinafter, modifications of the above-described embodiment will be listed. The modifications described below can be applied in combination as appropriate.

The abnormality detection system 100 in the present disclosure includes a computer system in, for example, a detection unit 712. The main configuration of a computer system is a processor and memory as hardware. When the processor executes the program recorded in the memory of the computer system, the function as the abnormality detection system 100 in the present disclosure is realized. The program may be pre-recorded in the memory of the computer system, may be provided through a telecommunications line, and may be recorded on a non-temporary recording medium such as a memory card, optical disk, or hard disk drive that can be read by the computer system. May be provided. A processor in a computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large scale integrated circuit (LSI). The integrated circuit such as IC or LSI referred to here has a different name depending on the degree of integration, and includes an integrated circuit called a system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). Further, an FPGA (Field-Programmable Gate Array) programmed after the LSI is manufactured, or a logical device capable of reconfiguring the junction relationship inside the LSI or reconfiguring the circuit partition inside the LSI should also be adopted as a processor. Can be done. A plurality of electronic circuits may be integrated on one chip, or may be distributed on a plurality of chips. The plurality of chips may be integrated in one device, or may be distributed in a plurality of devices. The computer system referred to here includes a microprocessor having one or more processors and one or more memories. Therefore, the microprocessor is also composed of one or a plurality of electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.

Further, it is not an essential configuration for the abnormality detection system 100 that a plurality of functions in the abnormality detection system 100 are integrated in one housing (monitoring unit 7), and a plurality of components of the abnormality detection system 100 are present. It may be distributed in the housing. Further, at least a part of the functions of the abnormality detection system 100 such as the detection unit 712 may be realized by, for example, the cloud (cloud computing). On the contrary, as in the above-described embodiment, all the functions of the abnormality detection system 100 may be integrated in one housing (monitoring unit 7).

In the above-described embodiment, the monitoring unit 7 does not have to include the second communication unit 73. That is, the abnormality detection system 100 does not have to have a communication function for communicating with the management server 300 and the information terminal 400 via a wide area network 200 such as the Internet. In this aspect, the detection result of the detection unit 712 is presented to the user only by the distribution board 1.

In the above embodiment, the monitoring unit 7 does not have to include the output unit 713. That is, the abnormality detection system 100 does not have to have a function of presenting the detection result of the detection unit 712.

Further, in the above-described embodiment, two CR circuits may be connected in parallel to one electric circuit. In this aspect, one CR circuit comprises a capacitor having a frequency characteristic different from the frequency characteristic of the impedance of the capacitor provided in the other CR circuit. Then, the detection unit 712 may determine by the second determination function that an arc has been generated in the wiring C11 when the voltage applied to both ends of the resistor in both of the two CR circuits exceeds the threshold value. .. In this embodiment, the frequency characteristics of the impedance of the capacitors included in each of the two CR circuits may be the same.

In the above-described embodiment, as shown in FIG. 9, for example, the detection unit 712 holds the peak value of the voltage information and compares the held peak value with the threshold value Th1 or the like, so that a wiring abnormality of the wiring C11 occurs. It may be determined whether or not it is. In the example shown in FIG. 9, the instantaneous value of the voltage information is represented by a solid line, and the peak value held by the peak hold circuit is represented by a alternate long and short dash line. The peak value of the voltage information is held by inputting the voltage information to a peak hold circuit using an operational amplifier such as an operational amplifier, for example.

In the above-described embodiment, when the detection unit 712 determines that the wiring abnormality of the wiring C11 has occurred by the first determination function, the wiring abnormality of the wiring C11 is automatically further generated by the second determination function. You may judge whether or not it is done. That is, when the voltage information satisfies a predetermined condition as a predetermined trigger, the detection unit 712 may detect the wiring abnormality by the second determination function. Here, the predetermined trigger is, for example, determining that a wiring abnormality of the wiring C11 has occurred by the first determination function, but other triggers may be used. For example, the predetermined trigger may be that the time when the voltage information exceeds the threshold Th1 elapses for a predetermined time.

In the above-described embodiment, the cutoff control unit 714 shuts off the corresponding branch breaker 4 when the detection unit 712 determines that a wiring abnormality of the wiring C11 has occurred, but the present invention is not limited to this. For example, the cutoff control unit 714 may shut off the main breaker 3 when the detection unit 712 detects a wiring abnormality.

In the above-described embodiment, the threshold values Th1 and Th2 and the determination periods T1 and T2 may be variable in each of the first determination function and the second determination function. That is, the threshold values Th1 and Th2 and the determination periods T1 and T2 may be appropriately set by, for example, the user operating the monitoring unit 7.

In the above-described embodiment, the detection unit 712 may be in a mode of detecting a wiring abnormality of the wiring C11 by using, for example, a machine-learned classifier. As an example, if it is the second determination function, the classifier outputs the presence or absence of a wiring abnormality of the wiring C11 by using the voltage information as input data. The classifier may be capable of performing re-learning while the abnormality detection system 100 is in use.

The classifier may include, for example, a linear classifier such as SVM (Support Vector Machine), a classifier using a neural network, or a classifier generated by deep learning using a multi-layer neural network. When the classifier is a classifier using a trained neural network, the trained neural network includes, for example, CNN (Convolutional Neural Network), BNN (Bayesian Neural Network), and the like. obtain. In this case, the detection unit 712 is realized by mounting a trained neural network on an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array).

(Summary)
As described above, the abnormality detection system (100) according to the first aspect includes an acquisition unit (711) and a detection unit (712). The acquisition unit (711) acquires voltage information regarding the voltage applied to the circuit (C1) connected to the distribution board (1). The detection unit (712) detects a wiring abnormality of the wiring (C11) in the circuit (C1) based on the voltage information acquired by the acquisition unit (711). The detection unit (712) has a plurality of determination functions including a first determination function and a second determination function. The first determination function is a function of determining that a wiring abnormality has occurred when the voltage information exceeds the threshold value (Th1). The second determination function is a function for determining whether or not a wiring abnormality has occurred by a determination method different from the first determination function. The detection unit (712) detects a wiring abnormality by any one of the plurality of determination functions in response to a predetermined trigger.

According to this aspect, there is an advantage that it is easy to detect a wiring abnormality of the wiring (C11).

In the abnormality detection system (100) according to the second aspect, in the first aspect, in the second determination function, whether or not a wiring abnormality has occurred by comparing the voltage information with a plurality of threshold values (Th2). To judge.

According to this aspect, there is an advantage that the detection accuracy of the wiring abnormality of the wiring (C11) can be expected to be improved as compared with the first determination function.

In the abnormality detection system (100) according to the third aspect, in the first or second aspect, in the second determination function, the detection unit (712) has a threshold value (Th1) different from the threshold value (Th1) of the first determination function. By comparing Th2) with the voltage information, it is determined whether or not a wiring abnormality has occurred.

According to this aspect, there is an advantage that the detection accuracy of the wiring abnormality of the wiring (C11) can be expected to be improved as compared with the first determination function.

In the abnormality detection system (100) according to the fourth aspect, in any one of the first to third aspects, in the second determination function, the detection unit (712) exceeds the threshold value (Th1) of the first determination function. It is determined whether or not a wiring abnormality has occurred based on whether or not the number of times has exceeded the predetermined number of times in a predetermined time.

According to this aspect, there is an advantage that the detection accuracy of the wiring abnormality of the wiring (C11) can be expected to be improved as compared with the first determination function.

In the abnormality detection system (100) according to the fifth aspect, in the fourth aspect, the determination period (T1) for determining whether or not a wiring abnormality has occurred is variable.

According to this aspect, there is an advantage that the detection accuracy of the wiring abnormality of the wiring (C11) can be expected to be improved as compared with the first determination function.

In the abnormality detection system (100) according to the sixth aspect, in any one of the first to fifth aspects, in the second determination function, the detection unit (712) has a predetermined integrated value (Th3) of the voltage information integrated value. ) Is exceeded, and it is determined whether or not a wiring abnormality has occurred.

According to this aspect, there is an advantage that the detection accuracy of the wiring abnormality of the wiring (C11) can be expected to be improved as compared with the first determination function.

In the abnormality detection system (100) according to the seventh aspect, in any one of the first to sixth aspects, the detection unit (712) makes a second determination when the voltage information satisfies a predetermined condition as a predetermined trigger. The function detects wiring abnormalities.

According to this aspect, there is an advantage that the second determination function can be used without the user manually switching to the second determination function.

In the abnormality detection system (100) according to the eighth aspect, in any one of the first to seventh aspects, the acquisition unit (711) further acquires the current information regarding the current flowing through the circuit (C1). The detection unit (712) determines whether or not to shut off the circuit (C1) in which the wiring abnormality is detected, based on the voltage information and the current information.

According to this aspect, it is not preferable that the power supply is interrupted as compared with the case where the circuit (C1) in which the wiring abnormality is detected is cut off as soon as the wiring abnormality in the wiring (C11) is detected. It has the advantage that it is easy to maintain the power supply to.

The abnormality detection system (100) according to the ninth aspect further includes a cutoff control unit (714) in the eighth aspect. When the wiring abnormality is detected by the detection unit (712) and the current flowing through the circuit (C1) in which the wiring abnormality is detected exceeds the threshold current, the circuit breaker control unit (714) is connected to the circuit (C1). The branch breaker (4) to be generated is shut off.

According to this aspect, it is not preferable that the power supply is interrupted as compared with the case where the circuit (C1) in which the wiring abnormality is detected is cut off as soon as the wiring abnormality in the wiring (C11) is detected. It has the advantage that it is easy to maintain the power supply to.

The abnormality detection system (100) according to the tenth aspect further includes a cutoff control unit (714) in the eighth aspect. When the detection unit (712) detects a wiring abnormality, the cutoff control unit (714) shuts off the main breaker (3).

According to this aspect, by cutting off the power supply to all the circuits (C1), improvement in safety can be expected as compared with the case where the power supply to at least one circuit (C1) is maintained. , Has the advantage.

In the abnormality detection system (100) according to the eleventh aspect, in the ninth or tenth aspect, the interruption control unit (714) interrupts the circuit (C1) in which the flowing current or the passing power is smaller than a predetermined value. Return from.

According to this aspect, since the power supply to the circuit (C1) having a relatively low risk of wiring abnormality of the wiring (C11) can be restarted, there is an advantage that the convenience can be expected to be improved.

The distribution board (1) according to the twelfth aspect is a distribution board cabinet (10) accommodating the abnormality detection system (100) of any one of the first to eleventh aspects and the abnormality detection system (100). And.

According to this aspect, there is an advantage that it is easy to detect a wiring abnormality of the wiring (C11).

The abnormality detection method according to the thirteenth aspect includes an acquisition step (ST1) and a detection step (ST2). The acquisition step (ST1) is a step of acquiring voltage information regarding the voltage applied to the circuit (C1) connected to the distribution board (1). The detection step (ST2) is a step of detecting a wiring abnormality of the wiring (C11) in the circuit (C1) based on the voltage information acquired in the acquisition step (ST1). The detection step (ST2) has a plurality of determination steps including a first determination step (ST31) and a second determination step (ST32). The first determination step (ST31) is a step of determining that a wiring abnormality has occurred when the voltage information exceeds the threshold value (Th1). The second determination step (ST32) is a step of determining whether or not a wiring abnormality has occurred by a determination method different from that of the first determination step (ST31). The detection step (ST2) detects a wiring abnormality in any one of the plurality of determination steps in response to a predetermined trigger.

According to this aspect, there is an advantage that it is easy to detect a wiring abnormality of the wiring (C11).

The program according to the fourteenth aspect causes one or more processors to execute the abnormality detection method of the thirteenth aspect.

According to this aspect, there is an advantage that it is easy to detect a wiring abnormality of the wiring (C11).

The configuration according to the second to eleventh aspects is not an essential configuration for the abnormality detection system (100) and can be omitted as appropriate.

100 Abnormality detection system 1 Distribution board 10 Distribution board cabinet 3 Main breaker 711 Acquisition unit 712 Detection unit 714 Blocking control unit C1 Circuit C11 Wiring ST1 Acquisition step ST2 Detection step ST31 1st judgment step ST32 2nd judgment step T1, T2 Judgment period Th1, Th2 threshold value Th3 predetermined integrated value

Claims (14)

An acquisition unit that acquires voltage information related to the voltage applied to the circuit connected to the distribution board, and
A detection unit that detects a wiring abnormality in the wiring in the circuit based on the voltage information acquired by the acquisition unit is provided.
The detection unit
The first determination function for determining that the wiring abnormality has occurred when the voltage information exceeds the threshold value, and
It has a plurality of determination functions including a second determination function for determining whether or not the wiring abnormality has occurred by a determination method different from the first determination function.
The wiring abnormality is detected by any one of the plurality of determination functions in response to a predetermined trigger.
Anomaly detection system. In the second determination function, the detection unit determines whether or not the wiring abnormality has occurred by comparing the voltage information with a plurality of threshold values.
The abnormality detection system according to claim 1. In the second determination function, the detection unit determines whether or not the wiring abnormality has occurred by comparing the voltage information with a threshold value different from the threshold value of the first determination function.
The abnormality detection system according to claim 1 or 2. In the second determination function, the detection unit determines whether or not the wiring abnormality has occurred depending on whether or not the number of times the threshold value of the first determination function is exceeded exceeds the predetermined number of times in a predetermined time.
The abnormality detection system according to any one of claims 1 to 3. The determination period for determining whether or not the wiring abnormality has occurred is variable.
The abnormality detection system according to claim 4. In the second determination function, the detection unit determines whether or not the wiring abnormality has occurred based on whether or not the integrated value of the voltage information exceeds a predetermined integrated value.
The abnormality detection system according to any one of claims 1 to 5. When the voltage information satisfies a predetermined condition as the predetermined trigger, the detection unit detects the wiring abnormality by the second determination function.
The abnormality detection system according to any one of claims 1 to 6. The acquisition unit further acquires current information regarding the current flowing through the circuit.
Based on the voltage information and the current information, the detection unit determines whether or not to interrupt the circuit in which the wiring abnormality is detected.
The abnormality detection system according to any one of claims 1 to 7. When the detection unit detects the wiring abnormality and the current flowing through the circuit in which the wiring abnormality is detected exceeds the threshold current, a breaker control unit for interrupting the branch breaker to which the circuit is connected is further provided. ,
The abnormality detection system according to claim 8. A circuit breaker control unit that shuts off the main breaker when the wiring abnormality is detected by the detection unit is further provided.
The abnormality detection system according to claim 8. The cutoff control unit restores the circuit in which the flowing current or the passing power is smaller than a predetermined value from the cutoff state.
The abnormality detection system according to claim 9 or 10. The abnormality detection system according to any one of claims 1 to 11.
A cabinet for a distribution board that houses the abnormality detection system is provided.
Distribution board. An acquisition step to acquire voltage information about the voltage applied to the circuit connected to the distribution board, and
It has a detection step for detecting a wiring abnormality of wiring in the circuit based on the voltage information acquired in the acquisition step.
The detection step
The first determination step of determining that the wiring abnormality has occurred when the voltage information exceeds the threshold value, and
It has a plurality of determination steps including a second determination step for determining whether or not the wiring abnormality has occurred by a determination method different from the first determination step.
The wiring abnormality is detected in any one of the plurality of determination steps in response to a predetermined trigger.
Anomaly detection method. For one or more processors
The abnormality detection method according to claim 13 is executed.
program.

Images