WO2016147526A1

WO2016147526A1 - Fault detection system and fault detection method

Info

Publication number: WO2016147526A1
Application number: PCT/JP2016/000305
Authority: WO
Inventors: 祐太朗北畑
Original assignee: 日本電気株式会社
Priority date: 2015-03-18
Filing date: 2016-01-21
Publication date: 2016-09-22
Also published as: JP6641707B2; JP2016174511A

Abstract

Provided is a fault detection system that is capable of detecting the occurrence of faults in electric equipment at an early stage. According to one embodiment of the present invention, a fault detection system is provided with the following: a switch (21) for controlling the supply of power to an electric light (L1) that is connected to a distribution board (10); a control circuit (20) that, when power is activated, controls the switch (21) so that the supply of power to the electric light (L1) is commenced after a preset number of current pulses have been inputted to the electric light (L1); and a power measurement apparatus (11) that is installed on the distribution board (10), and that, when the power to the electric light (L1) is activated, measures the number of current pulses and the load current of the electric light (L1) to detect any faults in the electric light (L1) on the basis of the measurement results.

Description

Fault detection system and fault detection method

The present invention relates to a failure detection system and a failure detection method.

A system that centrally manages multiple electrical devices is known. In Patent Literature 1, a managed device terminal device (terminal unit) is interposed between an electric device to be managed and a device centralized management device (host unit), and the power supply of the electric device is connected via the terminal unit. A device centralized management system that controls the above is disclosed.

When the electrical device is not compatible with the system, a power control unit that directly controls the supply of commercial power, which is the operating power source, is interposed between the electrical device and the terminal unit. When the terminal unit receives the control signal from the host unit, the corresponding control data is transmitted from the terminal unit to the power supply control unit. The power supply control unit controls the switch unit according to the data to control the supply of commercial power to the electrical equipment.

Patent Document 2 discloses a system for detecting an electric power abnormality in a space where electric power is used by a consumer such as a house, an apartment, a building, or a commercial facility. In this power abnormality detection system, a power abnormality is detected based on the predicted power demand of the electrical equipment and the power consumption of the electrical equipment measured by a power measurement unit or the like installed on the distribution board.

Japanese Patent Laid-Open No. 11-220882 JP 2013-093934 A

Conventionally, in a relatively simple electric device having no failure detection function such as an electric light, a person has detected a failure such as a broken ball by visual observation or the like. If the number of electrical devices is large, the detection of a failure may be delayed if a person inspects each electrical device. In addition, in human inspection, there may be omission of inspection due to human error. Moreover, when there are many electric devices, there exists a problem that management cost becomes high.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a failure detection system and a failure detection method capable of early detection of the occurrence of a failure in an electrical device. It is.

A failure detection system according to an aspect of the present invention includes a power supply switch that controls supply of power to a device connected to a distribution board, and a number of current pulses that are preset for the device when the power is turned on. The control unit that controls the power supply switch so as to start the supply of power to the device after input, and the current pulse when the device is turned on and is installed in the distribution board A power measurement unit that measures the number and the load current of the device and detects a failure of the device based on the measurement result.

According to the present invention, it is possible to provide a failure detection system and a failure detection method that can detect the occurrence of a failure in an electrical device at an early stage.

1 is a diagram showing a configuration of a failure detection system according to a first exemplary embodiment. It is a figure which shows the waveform of the electric current measured with the failure detection system which concerns on Embodiment 1 when only one area exists. It is a flowchart which shows the failure detection procedure by the failure detection system which concerns on embodiment. It is a figure which shows the state at the time of normal in case a some area exists. In the state shown in FIG. 4, it is a figure which shows the waveform of the current measured with the failure detection system concerning Embodiment 1. FIG. It is a figure which shows the state at the time of abnormality when a some area exists. FIG. 7 is a diagram illustrating a waveform of a current measured by the failure detection system according to the first embodiment in the state illustrated in FIG. 6. It is a figure which shows the state at the time of one part of the failure detection system concerning Embodiment 2. FIG. FIG. 9 is a diagram showing a waveform of a current measured by the failure detection system according to the second embodiment in the state shown in FIG. It is a figure which shows the state at the time of the one part abnormality of the failure detection system concerning Embodiment 2. FIG. In the state shown in FIG. 10, it is a figure which shows the waveform of the electric current measured with the failure detection system which concerns on Embodiment 2. FIG. It is a figure which shows the state at the time of normal in case a some area exists. In the state shown in FIG. 12, it is a figure which shows the waveform of the current measured with the failure detection system concerning Embodiment 2. FIG. It is a figure which shows the state at the time of abnormality when a some area exists. In the state shown in FIG. 14, it is a figure which shows the waveform of the electric current measured with the failure detection system concerning Embodiment 2. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. For clarity of explanation, the following description and drawings are omitted and simplified as appropriate. Note that, in each drawing, the same element is denoted by the same reference numeral, and redundant description is omitted as necessary.

The failure detection system according to the embodiment detects a failure of the electrical device by measuring a current flowing to the electrical device connected to a distribution board, a distribution board, or the like. In the embodiment, an example in which an electric lamp is used as an example of an electric device will be described.

Embodiment 1
FIG. 1 is a diagram illustrating a configuration of a failure detection system according to the first embodiment. As shown in FIG. 1, the failure detection system 1 includes a distribution board 10, a power measuring device 11, a CT (current transformer) 12, a breaker 13, a display 14, a communication network 15, a DB (database) 16, and a control circuit 20. , A switch 21 and a pulse number setting unit 22.

The failure detection system 1 can detect each failure of the lamp L in a plurality of areas A to C. The areas A to C are assumed to be spaces such as houses and apartments, commercial tenants, and office buildings. In FIG. 1, the control circuit 20 and the like in the areas B and C are not shown, but the areas B and C can have the same configuration as the area A.

The distribution board 10 distributes the electric power supplied from the commercial power system or the private power generator to each electric device (load) via a voltage line. In the example shown in FIG. 1, AC (alternating current) 100 V power is supplied to the distribution board 10. A breaker 13 is provided on each voltage line of the distribution board 10. The breaker 13 cuts off the supply of power to the electrical device when a current exceeding a certain level flows.

Further, CT 12 is provided on each voltage line in the distribution board 10. CT12 is a current sensor that detects the value of the current flowing through each voltage line. In the example shown in FIG. 1, lamps L in areas A to C are connected under the voltage line measured by one CT 12.

The distribution board 10 is provided with a power measuring instrument 11. The power measuring instrument 11 can measure the amount of power consumed by the lamp L based on the current value detected by the CT 12. A display 14 is connected to the power meter 11 in a state where communication is possible via the communication network 15. The communication network 15 is configured by, for example, a LAN (Local Area Network). As the communication network 15, a dedicated line, a public line, or the like can be used.

The display 14 displays various information output from the power meter 11. For example, the display 14 displays the lamp current flowing through the lamp L, the control circuit current supplied from the control circuit 20 to be described later to the lamp L, and the total current obtained by adding the lamp current and the control circuit current. The display 14 displays the detected failure location. The indicator 14 can be installed in the same building or site as the areas A to C.

A control circuit 20, a switch 21, and a pulse number setting unit 22 are connected to the lamps L in each of the areas A to C. The switch 21 is a power supply switch that controls the supply of power to the lamp L connected to the distribution board 10. In the example shown in FIG. 1, a plurality of switches 21 are connected under the voltage line measured by one CT 12. The lamps L in each of the areas A to C are connected to voltage lines via the switches 21, respectively.

A control circuit 20 is connected to each switch 21. The control circuit 20 controls the switch 21 to start supplying power to the lamp L after inputting a preset number of current pulses to the lamp L when the lamp L is turned on. . The power measuring instrument 11 described above measures the number of current pulses and the lamp current (load current) of the lamp L when power is supplied to the lamp L, and detects a failure based on the measurement result.

The pulse number setting unit 22 sets the number of current pulses supplied from the control circuit 20 to the lamp L. In the example illustrated in FIG. 1, a plurality of lamps L are connected to one voltage line of the distribution board 10, and the plurality of lamps L are provided with a control circuit 20, a switch 21, and a pulse number setting unit 22, respectively. ing. The number of current pulses is set individually for each lamp L. That is, the number of current pulses supplied to the lamps L in the areas A to C is different. The control circuits 20 in the areas A to C supply different numbers of current pulses to the lamps L in the areas A to C, respectively. The power measuring instrument 11 can identify the failure location according to the number of current pulses.

A DB 16 is connected to the power meter 11 via a communication network 15. The DB 16 stores a plurality of lamps L and the number of current pulses individually set for each lamp L in association with each other. That is, the number of current pulses is an ID for identifying the lamp L. In the DB 16, the ID and the area where the electric lamp L exists are linked and stored. The power meter 11 can identify which area of the lamp L has failed by comparing the measured number of current pulses with the number of current pulses stored in the DB 16. Further, the power measuring instrument 11 can detect the operation of each of the lamps L1 to L3 in accordance with the measured lamp current.

Here, with reference to FIGS. 2 and 3, the failure detection procedure of the electrical device in the failure detection system 1 will be described. FIG. 2 is a diagram illustrating a waveform of a current measured by the failure detection system 1 according to the first embodiment when only one area A exists. FIG. 3 is a flowchart showing a failure detection procedure by the failure detection system 1.

As shown in FIG. 2, it is assumed that one current pulse is supplied as a control circuit current to the lamp L in the area A. Under normal conditions, the lamp current rises after a current pulse is input. Therefore, at the normal time, the total current Ia includes one current pulse and a lamp current.

In the event of an abnormality, it is assumed that the lamp current does not flow due to the failure of the lamp L in area A such as a broken bulb. As indicated by a dotted line in FIG. 2, the lamp current does not rise at the time of abnormality. For this reason, at the time of abnormality, the total current Ia includes only one current pulse and does not include the lamp current.

As shown in FIG. 3, when the supply of power is started by turning on the switch 21 (step S1), the control circuit 20 operates (step S2). The control circuit 20 generates the number of current pulses set by the pulse number setting unit 22 (step S3). Here, one current pulse is generated. Thereafter, the control circuit 20 supplies a lamp current to the lamp L (step S4).

After the lamp current is supplied, the power meter 11 measures the total current including the current pulse and the lamp current (step S5). Then, the power measuring instrument 11 measures the number of current pulses included in the total current Ia, and specifies an area (step S6). As shown in FIG. 2, when one current pulse is measured, area A is specified.

Thereafter, the power meter 11 determines whether or not the lamp current is included in the total current Ia (step S7). In step S7, when the lamp current is present (present), it is determined as normal and the process ends. On the other hand, in step S7, when there is no lamp current (none), the power measuring device 11 detects a broken ball (failure) of the lamp L in the area A (step S8). Then, the failure location (out of the bulb L of the lamp L in area A) is displayed on the display 14 (step S9).

Next, an example in which a plurality of areas exist will be described with reference to FIGS. FIG. 4 is a diagram showing a normal state when a plurality of areas exist. FIG. 5 is a diagram illustrating a waveform of a current measured by the failure detection system according to the first embodiment in the state illustrated in FIG. 4. FIG. 6 is a diagram illustrating a state at the time of abnormality when a plurality of areas exist. FIG. 7 is a diagram illustrating a waveform of a current measured by the failure detection system according to the first embodiment in the state illustrated in FIG. 6.

As shown in FIG. 6, it is assumed that the lamp L2 in the area B is out of order at the time of abnormality. Even when there are a plurality of areas, the failure detection procedure by the failure detection system 1 is the same as that shown in FIG.

4 and 6, it is assumed here that there are three areas A to C. The lamps arranged in the areas A to C are referred to as lamps L1 to L3, respectively. As shown in FIGS. 5 and 7, one current pulse is supplied to the lamp L1 in the area A, two current pulses are supplied to the lamp L2 in the area B, and three current pulses are supplied to the lamp L3 in the area C. Shall be supplied. The number of current pulses may be different for each of the lamps L1 to L3, and can be arbitrarily set in advance.

As shown in FIGS. 5 and 7, when one current pulse is measured by the power meter 11, the area A is specified. Similarly, area B is specified when two current pulses are measured by the power meter 11. Further, when the current measuring device 11 measures three current pulses, the area C is specified. The power measuring device 11 identifies the area with reference to the DB 16. That is, the power measuring instrument 11 extracts individual feature amounts (current pulse numbers) of the lamps L1 to L3, and compares them with the feature amounts (current pulse numbers) for the lamps L1 to L3 registered in the DB 16. The lights L1 to L3 can be specified.

As shown in FIG. 5, there are lamp currents in the total currents Ia to Ic in the areas A to C at normal times. As shown in FIG. 7, when there is an abnormality, there is a lamp current in the total currents Ia and Ic in the areas A and C, but there is no lamp current in the total current Ib in the area B. As described above, the power measuring device 11 performs individual operation detection of the lamps L1 to L3 according to the lamp current. Thereby, the failure of the lamp L2 in the area B can be detected.

As described above, the failure detection system 1 can identify the area where the failure of the electrical device has occurred based on the number of current pulses, and automatically detect the presence or absence of the failure based on the current flowing through the electrical device. can do. Thereby, it becomes possible to detect a failure of an electric device such as a relatively simple lamp without a failure detection function. According to the failure detection system 1, it is possible to find a failure without omission at an early stage without requiring a person to check the electrical device.

Embodiment 2
Next, a failure detection system 1A according to the second embodiment will be described with reference to FIGS. The examples illustrated in FIGS. 8 to 11 are examples in which a failure is determined using the failure detection system 1A according to the second embodiment when one area exists.

FIG. 8 is a diagram illustrating a normal state of a part of the failure detection system according to the second embodiment. FIG. 9 is a diagram showing a waveform of current measured by the failure detection system according to Embodiment 2 in the state shown in FIG. FIG. 10 is a diagram illustrating a state of a part of the failure detection system according to the second embodiment when there is an abnormality. FIG. 11 is a diagram showing a waveform of a current measured by the failure detection system according to the second embodiment in the state shown in FIG. The configuration of the distribution board 10 to which the switch 21 is connected can be the same as that shown in FIG.

In Embodiment 2, a plurality of lamps L are connected to one switch 21. In the example shown in FIG. 8, the switch 21 is connected to three lamps L1 to L3. A control circuit 20 is connected between the switch 21 and the lamp L3. The number of current pulses supplied from the control circuit 20 to the lamps L1 to L3 is set by the pulse number setting unit 22. In the second embodiment, one current pulse number is set for the lamps L1 to L3. That is, the number of current pulses (feature amount) of the lamps L1 to L3 is the same.

When all of the lamps L1 to L3 are normally lit as shown in FIG. 8, as shown in FIG. 9, the total current Ia + b + c of the area is the current pulse and the lamp currents of the lamps L1 to L3 (lamp 1). Current, lamp 2 current, lamp 3 current). When the current flowing through each of the lamps L1 to L3 is 1A, the lamp current included in the total current is 3A.

In the case of an abnormality, as shown in FIG. 10, it is assumed that the lights L1 and L2 are normally lit and only the lamp L3 is not lit due to a broken ball. In such an abnormality, as shown in FIG. 11, the total current Ia + b + c includes only the current pulse and the lamp currents of the lamps L1 and L2 (lamp 1 current, lamp 2 current). Therefore, the lamp current included in the total current Ia + b + c is 2A. Thus, in Embodiment 2, the power meter 11 can identify the number of operating lamps based on the magnitude of the lamp current included in the total current.

Note that the failure detection procedure by the failure detection system 1A is substantially the same as that shown in FIG. 3, but in step S7, it is determined whether or not the lamp current included in the total current Ia + b + c is insufficient compared to the normal time. The If the lamp current is less than normal, the number of lamps that are out of bulb (failed) is detected in step S8.

Next, an example in which a plurality of areas exist will be described with reference to FIGS. FIG. 12 is a diagram illustrating a normal state when there are a plurality of areas. FIG. 13 is a diagram illustrating a waveform of a current measured by the failure detection system according to the second embodiment in the state illustrated in FIG. FIG. 14 is a diagram illustrating a state at the time of abnormality when a plurality of areas exist. FIG. 15 is a diagram illustrating a waveform of a current measured by the failure detection system according to the second embodiment in the state illustrated in FIG.

As shown in FIGS. 12 and 14, it is assumed here that there are two areas A and B. The lamps arranged in area A are referred to as lamps L1 to L3, and the lamps arranged in area B are lamps L4 to L6. As shown in FIGS. 13 and 15, it is assumed that one current pulse is supplied to the lamps L1 to L3 in the area A, and two current pulses are supplied to the lamps L4 to L6 in the area B. The number of current pulses may be different for each of the lamps L1 to L3 and the lamps L4 to L6, and can be arbitrarily set in advance.

As shown in FIGS. 13 and 15, when one current pulse is measured by the power meter 11, the area A is specified. Similarly, area B is specified when two current pulses are measured by the power meter 11. As shown in FIG. 13, in the normal state, the total current Ia + b + c in area A includes the lamp currents of lamps L1 to L3, and the total current Ic + d + e in area B includes the lamp currents of lamps L4 to L6. The lamp current included in the total current Ia + b + c and the total current Ic + d + e is 3A.

In the event of an abnormality, it is assumed that only the lamp L4 in area B has failed as shown in FIG. As shown in FIG. 15, in the event of an abnormality, the total current Ia + b + c in area A includes the lamp currents of lamps L1 to L3. However, the total current Ic + d + e in area B includes only the lamp currents of the lamps L5 and L6, and does not include the lamp current to the lamp L4. That is, in area A, the lamp current for three lamps is included, while in area B, only the lamp current for two lamps is included. When the current flowing through each of the lamps L1 to L6 is 1A, the total current Ia + b + c is 3A, while the total current Ic + d + e is 2A. The power measuring instrument 11 can detect the number of operating lamps according to the magnitude of the lamp current.

Thus, in the failure detection system 1A, it is possible to narrow down the area where the failure of the lamp is generated by the number of current pulses. Then, it is possible to expedite the discovery of a failure by inspecting only the narrowed area by visual inspection or the like. Further, since the number of electric lamps operating in the narrowed area can be specified, it is possible to grasp the number of failures to be found when a person inspects. Thereby, it becomes possible to suppress an inspection omission. In addition, the number of electrical devices to be inspected can be reduced, and the management cost can be reduced.

As described above, according to the present invention, it is possible to provide a failure detection system that can detect the occurrence of a failure at an early stage.

Note that the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention. In the example shown in FIG. 1, the CT 12 is arranged on the voltage line in the distribution board 10, but the location of the CT 12 is not particularly limited as long as it is on the electric circuit that supplies power to the electrical equipment. . Moreover, although the example which provided CT12 in the distribution board 10 is shown in FIG. 1, it is also possible to provide a current sensor in electric equipment other than the distribution board.

In the above-described embodiment, the area is specified and the failure of the electric device is determined based on the current flowing through the electric device. However, the present invention is not limited to this. For example, it is possible to use a power waveform calculated from a current waveform and a voltage waveform in the power measuring instrument 11.

The present invention has been described above with reference to the embodiment, but the present invention is not limited to the above. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the invention.

This application claims priority based on Japanese Patent Application No. 2015-054534 filed on March 18, 2015, the entire disclosure of which is incorporated herein.

1 Failure detection system 1A Failure detection system 10 Distribution board 11 Power meter 12 CT
13 Breaker 14 Display 15 Communication Network 16 DB
20 Control circuit 21 Switch 22 Pulse number setting section L, L1 to L6 Light

Claims

Power supply means for controlling the supply of power to the equipment connected to the distribution board;
Control means for controlling the power supply means so as to start supplying power to the device after inputting a preset number of current pulses to the device at the time of power-on;
A power measuring unit that is installed in the distribution board and measures the number of current pulses and the load current of the device when the device is powered on, and detects a failure of the device based on the measurement result When,
Comprising
Fault detection system.
A plurality of the devices are connected to the distribution board,
The power supply means is provided for each of the plurality of devices,
The number of current pulses is set individually for each device,
The failure detection system according to claim 1.
A database that stores a plurality of the devices and the number of the current pulses set individually for each device in association with each other;
The power measuring means identifies the failed device by comparing the measured number of current pulses with the number of current pulses stored in the database.
The failure detection system according to claim 2.
A plurality of the devices are connected to one power supply means,
Based on the load current measured by the power measuring means, the number of the devices to be operated is specified.
The failure detection system according to claim 1.
Power supply means for controlling the supply of power to start supplying power to the device after inputting a preset number of current pulses to the device connected to the distribution board when the power is turned on Control
When the device is powered on, measure the number of current pulses and measure the load current of the device, and detect a failure of the device based on the measurement result,
Fault detection method.
A plurality of the devices are connected to the distribution board,
The power supply means is provided for each of the plurality of devices,
The number of current pulses is set individually for each device,
Identify the failed device by comparing the measured number of current pulses with the number of current pulses set individually for each device.
The failure detection method according to claim 5.
A plurality of the devices are connected to one power supply means,
Identifying the number of devices in operation based on the measured load current;
The failure detection method according to claim 5.