JP2013172599A - Leakage detection automatic restoration system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a leakage detection automatic restoration system in which the time required for understanding the causes and repairing is shortened by automatically restoring a leakage breaker.SOLUTION: A leakage detection automatic restoration system 50 comprises: a smart meter 4 which controls outlets, a plurality of breakers, and a leakage breaker 6 by transferring information to and from a base server 1 installed in a base station over a network 2; a display section 3 displaying the insulation resistance history information and the transmission situation to each load by the smart meter 4; a leakage breaker 6 for interrupting power of a main power line 7 when electric leakage occurs or the contract power is exceeded; and breakers 9, 10, 13, 14, 17, 18 connected, respectively, with the main power line 7 and connected with respective loads, and interrupting the cable way when a specified current value is exceeded.

Description

  The present invention relates to a leakage detection automatic recovery system, and more particularly to a leakage detection automatic recovery system that automatically disconnects a leaked load and automatically restores power of another normal load.

A distribution board equipped with an integrating wattmeter for charging the electricity usage fee to each customer who receives power supply from the past, and a breaker as a safety device for detecting leakage and distributing power to each load There is. FIG. 6 is a diagram illustrating an example of a conventional distribution board. An integrating wattmeter 54 that receives power from the AC power line 70 and integrates the amount of power used, and monitors the total power in the consumer and shuts off all power when the contracted power is exceeded, causing the load to have poor insulation. In this case, the leakage breaker 56 that detects a leakage current flowing in the event of interruption and interrupts all the power, and a plurality of breakers 59, 60 that are arranged for each load path and interrupt the path when a predetermined current value is exceeded. And a distribution board 80 provided with 63, 64, 67, and 68.
Here, for example, when the washing machine 65 connected to the breaker 64 causes an insulation failure, the earth leakage breaker 56 detects this earth leakage (ground fault current) and interrupts the earth leakage breaker 56. As a result, power is not supplied to the load connected to each breaker. The user recognizes that there was a power failure at this point. However, since it is not possible to determine where the cause is, contact the electric power company to request an investigation, or remove the load from each outlet and manually turn on the leakage breaker 56 again to observe the state.
As a conventional technique, Patent Document 1 discloses a breaker automatic restoration device that automatically restores a breaker switch based on an operation command signal from the outside if a circuit is normal after the breaker operation.

JP 2001-118483 A

However, in dealing with general consumers, it is difficult to accurately grasp which load is the cause. Also, in the case of a phenomenon with no reproducibility, there is a risk of recurrence because the phenomenon is not always grasped even if an investigation is conducted from an electric power company.
In addition, the conventional technique disclosed in Patent Document 1 automatically recovers when the monitoring sensor detects the normality of the circuit in the breaker operation due to overcurrent or electric leakage caused by lightning strike, etc. As for the response method, the power company must respond to recovery as before.
The present invention has been made in view of such a problem, and when an insulation failure occurs in a load, the load system is automatically identified by specifying the load, and power is supplied to a normal system. The purpose is to provide an automatic leakage detection recovery system that shortens the time required for grasping and repairing the cause.

  In order to solve this problem, the present invention provides a first communication unit that transmits and receives a signal via a power line, a display unit that displays a power supply state to a load, and the first communication unit that receives the signal. A plurality of outlets each provided with a display control unit for controlling the display unit based on the received signal; and a second communication means disposed on the upstream side of the plurality of outlets for exchanging signals via the power line, the power line And a plurality of breakers provided with a breaker control unit that controls connection and disconnection of the first circuit breaker based on a signal received by the second communication means, and the plurality of breakers are connected A third communication means provided on the main power line for transmitting / receiving signals via the main power line, a second circuit breaker for connecting / disconnecting the main power line, and the second cutoff based on the signal received by the third communication means Control An earth leakage breaker having an earth leakage control unit, an information communication means arranged on the upstream side of the main power line and for exchanging information with a server installed in a base station, a memory for storing insulation resistance history information of each load Means, fourth communication means for exchanging information with the first communication means to third communication means, and the outlet, the plurality of breakers, and the electric leakage based on a signal received by the fourth communication means And a smart meter having a main control means for controlling the breaker.

  In the present invention, an earth leakage breaker that connects / disconnects a main power line connected to a plurality of breakers with respect to a breaker that connects / disconnects the power of an outlet connected to each load collects an insulation resistance value of the load via a communication means. The invention relates to a distribution board to be controlled. This distribution board is managed by a smart meter connected to the base server. The smart meter stores the insulation resistance value information of the load received from each breaker in the memory as history information. Accordingly, when an abnormality occurs in the insulation resistance value of the load, the abnormal load is specified with reference to the latest insulation resistance value information. The smart meter turns off the breaker to which the specified load is connected, and puts the breaker to which another normal load is connected. These pieces of information are transmitted to the base server one by one. As a result, the leakage breaker can be automatically restored to shorten the time required for grasping and repairing the cause.

According to a second aspect of the present invention, in the information received by the first communication unit to the third communication unit, the main control unit includes information indicating that an insulation resistance value of a load connected to the outlet indicates an abnormal value. The earth leakage breaker is instructed to turn off the second circuit breaker.
The main control means constantly monitors the insulation resistance value of each load. Accordingly, when it is detected that the insulation resistance value is an abnormal value (for example, a ground fault), it is determined that there is a leakage, and the second circuit breaker is turned off. Thereby, when a leakage is detected, the power system can be immediately shut off to ensure safety.

According to a third aspect of the present invention, the main control means refers to the latest insulation resistance history information stored in the storage means after the second circuit breaker is turned off, and the insulation resistance value is an abnormal value. It is characterized by specifying a certain load.
If a leakage occurs, immediately shut off the leakage breaker to ensure safety. However, at this time, it cannot be determined which load is abnormal. Therefore, in the present invention, the latest insulation resistance history information is referred to, and a load that varies greatly with respect to the value is specified as a load in which an abnormality has occurred. As a result, the load can be identified immediately.

According to a fourth aspect of the present invention, the main control means turns off the first circuit breaker of the breaker to which the outlet is connected in order to stop supplying power to the outlet to which the specified load is connected. Each breaker is instructed to bring the first circuit breaker other than the breaker into a contact state.
When the main control means turns off the first breaker of the breaker to which an abnormal load is connected, it is necessary to supply power to other normal loads as soon as possible. Therefore, in the present invention, the abnormal and normal first circuit breaker is controlled almost simultaneously. As a result, normal load recovery can be accelerated.

According to a fifth aspect of the present invention, the main control means measures the insulation resistance value of the specified load after the second circuit breaker of the earth leakage breaker is in a contact state, and when the insulation resistance value is normal This is displayed on the display means, and the current power transmission status to each load is displayed.
When the earth leakage breaker is in the contact state, power is supplied to the main power line. At this time, power is not supplied to the specified load, but the insulation resistance value can be measured. If the insulation resistance value is normal as a result of the measurement, the fact is displayed on the display unit and the current power transmission status is displayed. As a result, the user can immediately grasp which load is abnormal and what is the current situation.

According to a sixth aspect of the present invention, there is provided a reader for reading the recording information of the non-contact information recording medium storing the information for specifying the load in the outlet.
It is unpredictable to which outlet each load is connected. That is, the same load may be connected by changing the outlet. Therefore, in the present invention, the plug socket of each load is provided with a non-contact information recording medium (IC tag or the like) in which information specifying the load is recorded, and a reader for reading the information is provided on the outlet side. When the plug socket is inserted into the outlet, the reader can read the recorded information and specify the load. As a result, information specifying the load can be acquired regardless of which outlet is loaded.

According to the present invention, when an abnormality occurs in the insulation resistance value of the load, the smart meter identifies the abnormal load with reference to the latest insulation resistance value information, and disconnects the breaker to which the identified load is connected. As the status, the breaker to which other normal load is connected is set to the connected status, and this information is transmitted to the base server one by one. It can be shortened.
Further, when the main control means detects that the insulation resistance value is an abnormal value (for example, ground fault), it determines that there is a current leak and turns off the second circuit breaker. The power system can be cut off to ensure safety.
In addition, since the load that greatly fluctuates with respect to the value of the latest insulation resistance history is identified as the load in which an abnormality has occurred, the load can be identified immediately.
In addition, when the main control means turns off the first breaker of the breaker to which the abnormal load is connected, in order to supply power to other normal loads as soon as possible, the abnormal and normal Since one breaker is controlled, normal load recovery can be accelerated.
In addition, if the insulation resistance value is normal as a result of the measurement, that fact is displayed on the display unit and the current power transmission status is displayed, so that the user can determine which load is abnormal and the current status is It is possible to immediately grasp the situation.
In addition, each plug socket is provided with a non-contact information recording medium (IC tag or the like) on which information for identifying the load is recorded, a reader for reading the information on the outlet side, and when the plug socket is inserted into the outlet. Since the reader can read the recorded information and specify the load, information specifying the load can be acquired regardless of the outlet inserted into the outlet.

It is a block diagram showing the structure of the electric leakage detection automatic recovery system which concerns on embodiment of this invention. It is a figure which shows an example of the internal structure of the electric leakage detection automatic recovery system which concerns on embodiment of this invention. It is a figure which shows an example of the insulation resistance log | history information memorize | stored in the memory of a smart meter. It is a flowchart explaining operation | movement of the electric leakage detection automatic recovery system which concerns on embodiment of this invention. It is a figure which shows the content displayed on the display part which the smart meter which concerns on this invention controls. It is a figure which shows an example of the conventional distribution board.

  Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. .

  FIG. 1 is a block diagram showing the configuration of a leakage detection automatic recovery system according to an embodiment of the present invention. The leakage detection automatic recovery system 50 of the present invention exchanges information via the base server 1 and the network 2 installed in the base station, and unifies the outlet (or outlet, hereinafter referred to as FIG. 2). ) 11, 8, a plurality of breakers 9, 10, 13, 14, 17, 18, and smart meter 4 for controlling leakage breaker 6, and insulation resistance history information and power transmission status to each load are displayed by smart meter 4. Display unit 3, earth leakage breaker 6 that cuts off power on main power line 7 when leakage and contract power exceed, and main power line 7 are connected to each load and connected to each load to cut off the circuit when the specified current value is exceeded Breakers 9, 10, 13, 14, 17, 18 are provided. The main power line 7 is a single-phase three-wire system, 7b is a neutral wire (earth), and a voltage of 100V is generated between 7a and 7b, 100V between 7b and 7c, and 200V between 7a and 7c. . The breaker 9 is connected to an outlet 8, the breaker 10 is connected to an outlet 11, the breaker 13 is connected to a light 12, the breaker 14 is connected to a washing machine 15, and the breaker 17 is connected to a 200V air conditioner. 16 is connected, and an IH kitchen 19 is connected to the breaker 18.

Next, a schematic operation of the leakage detection automatic recovery system according to the present embodiment will be described.
In the present embodiment, the leakage breaker 6 that connects / disconnects the main power line 7 connected to a plurality of breakers with respect to the breaker that connects / disconnects the power of the outlet connected to each load has the load insulation resistance value via the communication means. The invention relates to a distribution board 51 that collects and controls. The distribution board 51 is managed by the smart meter 4 connected to the base server 1. The smart meter 4 stores the load insulation resistance value information received from each breaker in the memory as history information. Accordingly, when an abnormality occurs in the insulation resistance value of the load, the abnormal load is specified with reference to the latest insulation resistance value information. The smart meter 4 sets the breaker to which the specified load is connected to the disconnected state, and sets the breaker to which another normal load is connected to the connected state. These pieces of information are transmitted to the base server 1 one by one. As a result, the leakage breaker 6 can be automatically restored to reduce the time required for grasping and repairing the cause.

FIG. 2 is a diagram showing an example of the internal configuration of the leakage detection automatic recovery system according to the embodiment of the present invention. In FIG. 2, one breaker and one outlet are illustrated, but the internal configurations of the other breakers and outlets are the same as those in FIG. 2.
The smart meter 4 is arranged on the upstream side of the main power line 7 and stores a communication unit (information communication means) 21 that exchanges information with the base station server 1 installed in the base station, and stores insulation resistance history information of each load. Based on the signals received by the fourth communication means 25 and the fourth communication means 25 for exchanging information between the memory (storage means) 23 and the third communication means 28, 29 to the first communication means 33. A control unit (main control means) 24 that controls the outlet 8, the breaker 9, and the earth leakage breaker 6 and an integrating wattmeter 22 that receives power from the AC power line 5 and integrates the amount of power are provided. The control unit 24 is connected to the display unit 3 for displaying the insulation resistance history information and the power transmission status to each load.

The earth leakage breaker 6 is provided in the main power line 7 to which the breaker 9 is connected. The third communication means 28 and 29 for transmitting and receiving signals through the main power line 7 and the second circuit breaker 27 for connecting and disconnecting the main power line 7. , And a leakage control unit 26 that controls the second circuit breaker 27 based on the signals received by the couplers 28 and 29.
Further, the breaker 9 is arranged on the upstream side of the outlet 8 and is received by the second communication means 32 that exchanges signals through the power line 20, the first circuit breaker 31 that connects and disconnects the power line 20, and the second communication means 32. A breaker control unit 30 that controls connection / disconnection of the first circuit breaker 31 based on the signal is provided.
In addition, the outlet 8 receives the signal received by the first communication unit 33, the first communication unit 33 that transmits and receives signals through the power line 20, the LED (display unit) 35 that displays the supply state of power to the load 41, and A display control unit 34 that controls lighting of the LED 35 based on the display 35 is provided. The outlet 8 may be provided with a reader 36 that reads recorded information of an IC tag (non-contact information recording medium) 38 that stores information for specifying the load 41.

It is unpredictable to which outlet each load is connected. That is, the same load may be connected by changing the outlet. Therefore, in the present embodiment, an IC tag 38 that records information for specifying the load 41 is provided in the plug socket 39 of each load, and a reader 36 that reads the information is provided in the outlet 8. When the plug socket 39 is inserted into the outlet port 40 of the outlet 8, the reader 36 reads the record information of the IC tag 38 and specifies the load 41. As a result, information specifying the load can be acquired regardless of which outlet is loaded.
Here, the first to fourth communication means may be power line carrier communication in which a high frequency signal is superimposed on a power line by a coupler, or may include a dedicated communication line.

  FIG. 3 is a diagram showing an example of insulation resistance history information stored in the memory of the smart meter. For example, assume that outlets 1 to 4 are connected to the breaker A, and loads A to D are connected to the outlets. And the insulation resistance value measured for every load is recorded. These insulation resistance values are periodically updated. Here, when leakage occurs, the latest insulation resistance value of each load is referred to and compared with the currently measured insulation resistance value. As a result of the comparison, it is determined that the load having a value changed by a predetermined value or more is a load that is leaking.

  FIG. 4 is a flowchart for explaining the operation of the leakage detection automatic recovery system according to the embodiment of the present invention. This will be described with reference to FIG. Here, it is assumed that the smart meter 4 measures the insulation resistance value of each load at a constant cycle and updates the insulation resistance history information stored in the memory 23.

  For example, when the insulation resistance of the load 41 decreases (Yes in S1), the information is transmitted to the smart meter 4 via the breaker 9 and the leakage breaker 6 (S2). The smart meter 4 determines that a leakage has occurred from the information, transmits the information of the “OFF” operation to the leakage breaker 6, and the leakage breaker 6 that has received the information puts the second breaker 27 in a disconnected state ( S3). Next, the smart meter 4 refers to the latest insulation resistance history information in the memory 23, and identifies a load whose current insulation resistance value has changed significantly as an abnormal load (S4). That is, the device failure (identifying which device) after the outlet is determined based on the insulation resistance history of each breaker and each outlet. Next, the smart meter 4 stores that the load connected to the outlet 8 connected to the breaker 9 is causing an insulation failure (S5). Next, the defective load is disconnected from the outlet 8 in terms of data and power transmission is disabled (S6). Next, the smart meter 4 commands the earth leakage breaker 6 to start power transmission to all circuits / outlets except the defective load (S7). The earth leakage breaker 6 that has received the information puts the second circuit breaker 27 into a contact state (S8). Next, the smart meter 4 confirms all power transmissions other than the defective load (S9). Subsequently, the smart meter 4 reconfirms the insulation resistance value by virtual power transmission to the defective load (S10). Then, the smart meter 4 confirms on the data that the insulation resistance value has returned to the normal value, and recognizes whether re-transmission is possible (S11). However, no power is transmitted at this point. Next, the smart meter 4 transmits the current power transmission status and abnormality content to the display unit 3 (S12). Note that the same information can be displayed on a mobile phone and a smartphone by pre-registration. Then, the earth leakage breaker is operated due to the insulation failure of the load 41 on the display unit 3, and it is displayed that all power transmission is currently performed except for the defective part (S 13). It should be noted that although the insulation resistance value of the load 41 is now restored to a normal value and can be re-transmitted, it is warned that the repair request is optimal. In addition, it is up to the user to decide whether to maintain the current state or retransmit power. In the case of re-transmission, instruct power transmission from the screen. Here, when re-transmission is performed (re-transmission in S14), an instruction is given from the “power transmission start” 44 of the display unit 3 (S15). Thereafter, the smart meter 4 transmits the operation history to the base server 1 (S16). Note that if no leakage is detected in step S1 (No in S1), the process may proceed to step S16 to periodically transmit the operation history to the base server 1.

  That is, the control unit 24 constantly monitors the insulation resistance value of each load. Therefore, when it is detected that the insulation resistance value is an abnormal value (for example, ground fault), it is determined that there is a leakage, and the second circuit breaker 27 is turned off. Thereby, when a leakage is detected, the power system can be immediately shut off to ensure safety. Further, when a leakage occurs, the leakage breaker 6 is immediately shut off to ensure safety. However, at this time, it cannot be determined which load is abnormal. Therefore, in this embodiment, the latest insulation resistance history information is referred to, and a load that varies greatly with respect to the value is specified as a load in which an abnormality has occurred. As a result, the load can be identified immediately. In addition, when the control unit 24 turns off the first circuit breaker 31 of the breaker 9 to which an abnormal load is connected, it is necessary to supply power to other normal loads as soon as possible. Therefore, in the present embodiment, the abnormal and normal first circuit breaker 31 is controlled substantially simultaneously. As a result, normal load recovery can be accelerated. Further, when the earth leakage breaker 6 is brought into a contact state, power is supplied to the main power line 7. At this time, power is not supplied to the specified load, but the insulation resistance value can be measured. If the insulation resistance value is normal as a result of the measurement, the fact is displayed on the display unit 3 and the current power transmission status is displayed. As a result, the user can immediately grasp which load is abnormal and what is the current situation.

  FIG. 5 is a diagram showing the contents displayed on the display unit controlled by the smart meter according to the present invention. On the display unit 3, for example, the wiring state inside the customer is displayed on the left side, and the positional relationship between the loads is clearly shown. On the right side, the power transmission status by circuit is displayed. For example, the circuits (1) to (3) are in power transmission and are displayed in red, and the circuit (4) is displayed in red in the 1F bathroom in part due to power failure and the lighting is in red. . In addition, the washing machine is displayed in blue indicating that a power outage is occurring. Furthermore, circuits (5) and (6) are displayed in red indicating that power is being transmitted. In addition, buttons for “start power transmission” 44 and “stop power transmission” 45 that are pressed when starting power transmission based on the user's judgment are arranged at the bottom of the screen.

  As described above, the smart meter 4 of the leakage detection automatic recovery system 50 according to the present invention applies an abnormal load with reference to the latest insulation resistance value information when an abnormality occurs in the insulation resistance value of the load 41. The information is transmitted to the base server 1 one by one, with the breaker 9 to which the specified load is specified being disconnected and the breaker to which the other normal load is connected being connected, automatically. The time required for grasping and repairing the cause can be shortened by restoring the leakage breaker 6.

Further, when the control unit 24 detects that the insulation resistance value is an abnormal value (for example, ground fault), the control unit 24 determines that there is a leakage, and turns off the second circuit breaker 27 of the leakage breaker 6. If this happens, the power system can be shut off immediately to ensure safety.
In addition, since the load that greatly fluctuates with respect to the value of the latest insulation resistance history is identified as the load in which an abnormality has occurred, the load can be identified immediately.
In addition, when the control unit 24 turns off the first circuit breaker 31 of the breaker 9 to which an abnormal load is connected, in order to supply power to other normal loads as soon as possible, the abnormality and normality are almost simultaneously performed. Since the first circuit breaker 31 is controlled, the normal load can be quickly restored.

Further, when the insulation resistance value is normal as a result of the measurement, the fact is displayed on the display unit 3 and the current power transmission status is displayed, so that the user can determine which load is abnormal and the current status. It is possible to immediately grasp what kind of situation is.
Further, each load socket 39 includes an IC tag 38 that records information for identifying the load, and the outlet 8 includes a reader 36 that reads the information. When the plug socket 39 is inserted into the outlet 8, the reader 36 Since the recorded information can be read and the load 41 can be specified, information specifying the load can be acquired regardless of the outlet inserted into any outlet.

  1 Base server, 2 network, 3 display unit, 4 smart meter, 5 AC power line, 6 earth leakage breaker, 7 main power line, 8, 11 outlet, 9, 10, 13, 14, 17, 18 breaker, 12 lighting, 15 washing Machine, 16 200V air conditioner, 19 IH kitchen, 20 power line, 21 communication unit, 22 integrating wattmeter, 23 memory, 24 control unit, 25 fourth communication means, 26 earth leakage control unit, 27 second circuit breaker, 28, 29 first 3 communication means, 30 breaker control section, 31 first circuit breaker, 32 second communication means, 33 first communication means, 34 display control section, 35 LED, 36 reader, 37 electromagnetic wave, 38 IC tag, 39 plug socket, 40 It is a figure which shows the wiring state of the outlet socket, 41 load, and 42 modeled house. 43 Button for power transmission status by circuit, 44 button for indicating power transmission start, 45 button for indicating power transmission stop, 50 automatic detection system for detecting electric leakage, 51 distribution board

Claims (6)

A first communication unit that transmits and receives a signal via a power line, a display unit that displays a supply state of power to a load, and a display control unit that controls the display unit based on a signal received by the first communication unit. With multiple outlets
The second communication means disposed upstream of the plurality of outlets for transmitting / receiving a signal via the power line, a first circuit breaker for connecting / disconnecting the power line, and a signal received by the second communication means. A plurality of breakers having a breaker control unit for controlling connection / disconnection of one circuit breaker;
The third power means provided on the main power line to which the plurality of breakers are connected, and exchanges signals via the main power line, the second circuit breaker that connects and disconnects the main power line, and the signal received by the third communication means An earth leakage breaker including an earth leakage control unit for controlling the second circuit breaker based on
Information communication means arranged on the upstream side of the main power line and for exchanging information with a server installed in the base station, storage means for storing the insulation resistance history information of each load, the first communication means to the third communication Smart comprising: fourth communication means for exchanging information with the means; and main control means for controlling the outlet, the plurality of breakers, and the leakage breaker based on a signal received by the fourth communication means An electrical leakage detection automatic recovery system characterized by comprising a meter.   The main control means, when there is information indicating that the insulation resistance value of the load connected to the outlet is abnormal in the information received by the first communication means to the third communication means, the second circuit breaker 2. The leakage detection automatic recovery system according to claim 1, wherein the leakage breaker is instructed to be in a disconnected state.   The main control means specifies the load whose insulation resistance value is an abnormal value with reference to the latest insulation resistance history information stored in the storage means after the second circuit breaker is turned off. The leakage detection automatic recovery system according to claim 1 or 2.   The main control means turns off the first circuit breaker of the breaker to which the outlet is connected in order to stop the supply of power to the outlet to which the specified load is connected, and the other than the breaker The leakage detection automatic recovery system according to any one of claims 1 to 3, wherein each breaker is instructed to bring the first circuit breaker into a contact state.   The main control means measures the insulation resistance value of the specified load after the second circuit breaker of the earth leakage breaker is in a contact state, and indicates that if the insulation resistance value is normal The leakage detection automatic recovery system according to any one of claims 1 to 4, wherein a current transmission status to each load is displayed on the means.   The leakage detection automatic recovery system according to claim 1, further comprising a reader that reads recorded information of a non-contact information recording medium storing information specifying a load in the outlet.

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