JP2017123705A - Distribution board monitoring system, distribution board, and distribution board monitoring device that can be installed in them - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique that enables a user to know information concerning power failure when using a smart meter having a current limiter.SOLUTION: The distribution board monitoring device simulates and determines the opening/closing state of a current limiter of a smart meter on the basis of a measurement value of a main trunk primary side sensor of a distribution board. As a result, it is possible to notify a user of overcurrent (overuse of electricity) even if there is no information input from the smart meter. In addition, the distribution board monitoring device may determine the cause of the power failure on the basis of the opening/closing state of the main breaker and the presence or absence of a leakage/overvoltage trip signal. For example, when the smart meter shuts off first, it is judged as overcurrent, and when it is detected on the distribution board side, it can be judged that there is an abnormality on the load side.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a distribution board monitoring system that is provided in a distribution facility in which power from a commercial system of an electric power company is supplied to a distribution board via a smart meter, and in particular, monitors a switching operation by the smart meter, and the distribution board And a distribution board monitoring device that can be installed on them.

  Conventionally, distribution boards installed indoors such as houses are equipped with current limiting functions such as ampere breakers and service breakers (SB) that shut down the power supply by detecting overcurrent to load equipment and leakage of wiring equipment. It has been. In order for a user who receives power to check the accumulated amount of power usage or to recover from a power outage due to excessive use of electricity, the user usually has to go to the distribution board. In order to eliminate such complications, for example, a technology has already been proposed that uses an intercom installed in the living room to display an integrated value of power consumption, usage charges, etc., and to notify an alarm based on overcurrent. (For example, refer to Patent Document 1).

  On the other hand, in recent years, with the spread of smart meters and HEMS (Home Energy Management System), which are important elements constituting a smart grid, provision of various new services using these has been promoted by electric power companies. One of the new services provided by such smart grids is the capacity setting of contract amperes using smart meters. To achieve this, the current limiting function that has traditionally been used in indoor distribution boards and distribution boards (Opening / closing operation function of service breaker, etc.) needs to be transferred to the smart meter side.

Japanese Patent No. 3904404

  By the way, in a smart meter equipped with such a current limiting function, if an overcurrent due to excessive use of electricity is detected, the current limiting function is activated before the main breaker of the distribution board to cut off the power supply. The power is set to be turned on again after a certain period of time. In the past, even if a power outage occurred, the user could easily turn on the power by reviewing the power usage status of the load equipment and operating the breaker of the distribution board in the room. Also, if the earth leakage breaker was lost during a power outage, we were able to take appropriate measures such as contacting an electrician and requesting repair of the earth leakage location.

  However, if the power is automatically shut off on the smart meter side, the user cannot grasp the reason for the power outage, and after the power is turned on again on the smart meter side for a predetermined number of times, the user can restart the power manually. The input operation cannot be performed (this is referred to as “re-input stop setting”). Once re-stop is set, the user must contact the electric power company and request the smart meter setting cancellation in order to restore the energization.

  Therefore, according to the present invention, when using a smart meter equipped with a current limiting function, the user can know information about the power failure, and the user can take a quick and accurate initial response at the time of the power failure. It aims to provide technology.

  In order to solve the above problems, the present invention provides a distribution board monitoring system provided in a distribution board to which power is supplied from a commercial system via a smart meter having a current limiting function. It is the distribution board monitoring system provided with the monitoring apparatus which acquires the interruption | blocking information relevant to.

  The said structure WHEREIN: It is preferable to provide the alerting | reporting means which alert | reports the interruption | blocking information at that time after the said smart meter interrupts | blocks an electric power supply and recovers.

  Moreover, the said monitoring apparatus may acquire the said interruption | blocking information based on the overcurrent value detected by the main sensor of the said distribution panel, and the time overcurrent continued.

  Moreover, the said monitoring apparatus may acquire the said interruption | blocking information based on the signal which the said smart meter outputs.

  Moreover, the said monitoring apparatus may be comprised so that the factor of a power failure can be determined from the relationship between the measured value detected by the main sensor of the said distribution board, and the open / close state of a main breaker.

  Further, when the current value detected by the main sensor on the primary side when a power failure occurs is less than or equal to a predetermined value, the monitoring device may determine that the cause of the power failure is due to a factor other than an overcurrent.

  Moreover, the said monitoring apparatus may determine that the cause of a power failure exists in load side abnormality based on the trip signal of the main trunk breaker input.

  In addition, the present invention is a distribution board to which power is supplied from a commercial system via a smart meter having a current limiting function, and includes a monitoring device that acquires interruption information related to the opening / closing operation of the smart meter. It is a distribution board.

  Further, the present invention is a distribution board monitoring device that can be installed on a distribution board to which power is supplied from a commercial system via a smart meter having a current limiting function, wherein the interruption related to the opening / closing operation of the smart meter It is a distribution board monitoring device that acquires information.

  According to the present invention, even when the power supply is interrupted due to an abnormality detected on the smart meter side, the information regarding the power failure can be accurately known on the power user side. In addition, the user can quickly take an accurate initial response to a power failure according to the notification information before the smart meter side is set to stop the re-input.

1 is a block diagram of a distribution board monitoring system and its surroundings according to a first embodiment. It is a graph which illustrates the IT interruption | blocking characteristic which is the relationship between a rated current ratio and the time to interruption | blocking. It is a block diagram of the distribution board monitoring system and its periphery by 2nd Embodiment. It is a block diagram of the distribution board monitoring system and its periphery by 3rd Embodiment. It is a flowchart which illustrates the determination process of the power failure factor by the distribution board monitoring apparatus of 3rd Embodiment.

  The distribution board monitoring system of the present invention is mounted on distribution facilities (including distribution boards and distribution boards) to which commercial power is supplied via a smart meter equipped with a current limiting function. A distribution board monitoring device is provided that can detect the cause of a power failure by directly or indirectly (simulated) detecting the opening / closing operation of an operating smart meter. Several preferred embodiments of the monitoring system of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram showing only the main configuration of the distribution board monitoring system 10 and its surroundings according to the first embodiment of the present invention.

  The smart meter 60 connected to the lead-in wire drawn into the house from the pole transformer TR is a communication unit 61, a display unit 62, a measurement unit 63, and a current limiter 64 (specifically, a service breaker, abbreviated as “SB”). However, for each function, for example, it has a structure incorporated in four stages.

  The measurement unit 63 is a unit that monitors the power supply amount (purchased power amount) of the commercial system in time series and measures the integrated value. The monitoring information for one day or a plurality of days detected by the measuring unit 63 is temporarily accumulated in the memory of the smart meter 60, and the accumulated information is periodically or in response to a command from the center. The communication unit 61 is configured to be able to transmit to the center.

  The current limiter 64 is set so as to cut off the supply of power when an overcurrent exceeding the rating (contract amperage) is supplied to the load side for a predetermined time according to, for example, the IT cutoff characteristic shown in FIG. . According to FIG. 2, for example, when an overcurrent state of 300% with respect to the rated current value continues for 3.5 minutes, the current limiter 64 is in an “open” state at that time, and the power supply from the smart meter 60 is cut off. To do. As shown in FIG. 2, the time until the power supply is cut off is set to be shortened step by step as the overcurrent increases.

  However, even if the smart meter 60 “opens” the current limiter 64 due to an overcurrent and cuts off the power supply, the smart meter 60 automatically “closes” the current limiter 64 after a certain period of time has elapsed to supply power. It is programmed to re-enter. Normally, when a power failure occurs due to an easily recoverable reason such as excessive use of electricity, the user can review the usage state of the load device and manually turn on the power by operating the current limiter 64 manually. . However, if the reason for the power outage is not known and an appropriate response cannot be made, or after automatic re-insertion has been repeated a predetermined number of times on the smart meter 60 side without the user noticing going out, manual re-input It is set so that it cannot be operated (this is referred to as “re-throw stop setting”). In this case, the user must contact the electric power company to cancel the setting for stopping recharging of the smart meter 60 in order to restore the energization. In addition, the user cannot grasp the reason for the power failure, and there is a risk that the power is turned on again despite the power failure due to a serious cause such as a short circuit or leakage.

  Therefore, the distribution board monitoring system 10 according to the present invention includes the distribution board monitoring device 12 that can be installed on the distribution board 11, and the interruption information related to the opening / closing operation of the current limiter 64 on the smart meter 60 side. Is configured to acquire directly or indirectly. Here, “installable” on the distribution board 11 includes not only the case where the distribution board monitoring device 12 is installed in the distribution board 11 but also the case where it is installed outside the distribution board 11. means.

  In the first embodiment of the present invention, the distribution board monitoring device 12 is configured to simulate and determine an overcurrent in the distribution board 11. Specifically, the overcurrent value detected by the primary side sensor 14 of the main breaker 13 and the time during which the overcurrent state continues are acquired as the interruption information.

  Moreover, the distribution board monitoring apparatus 12 is provided with the alerting | reporting means which alert | reports the acquired interruption | blocking information outside. “External” for notifying the shutoff information corresponds to, for example, the HEMS controller 70 or the portable terminal 71 other than the distribution board monitoring system 10. For example, the notification unit can display information such as “warning” that is a short circuit or “caution” that is excessive use of electricity on the display unit of the HEMS controller 70 as a notification level. Moreover, you may alert | report to portable terminals 71, such as a smart phone and a tablet PC which a user owns, using a mail and a special application.

  As shown in FIG. 2, on the smart meter 60 side, the time until the interruption is set is shortened stepwise as the overcurrent is larger. In this example, the distribution board monitoring device 12 monitors the current value obtained from the primary side sensor 14, and shuts off the power supply on the smart meter 60 side when, for example, an overcurrent of 300% with respect to the rating is detected. At a time earlier than 3.5 minutes (for example, 3 minutes), the HEMS controller 70 and the portable terminal 71 are notified to the interruption information (notification level [alarm, caution], overcurrent value [A], rated current ratio). [%], Overcurrent duration [second], etc.) may be reported.

  In addition, the distribution board monitoring device 12 monitors the current value obtained from the primary side sensor 14, and shuts down the power on the smart meter 60 side and recovers power (returns on), and then displays the interruption information determined by simulation. You may alert | report to the controller 70 or the portable terminal 71. FIG.

  If the distribution board monitoring device 12 is equipped with a battery, even if the power is shut off on the smart meter 60 side, the user can be notified that the power failure has occurred before the power is restored. Notification can also be made.

  According to the distribution board monitoring system 10 of the first embodiment, even if information from the smart meter 60 is not obtained, an abnormality such as an overcurrent is simulated and determined only on the distribution board 11 side. The user can be notified. In addition, it is possible to prompt the user to take an appropriate response at the stage before the recharging stop is set on the smart meter 60 side. Thereby, the user can know the information regarding a power failure, and can take an appropriate initial response.

(Second Embodiment)
FIG. 3 is a block diagram showing a main configuration of the distribution board monitoring system 20 and its surroundings according to the second embodiment of the present invention. The distribution board monitoring system 20 according to the second embodiment uses the same smart meter 60 as described in the first embodiment, and the description thereof is omitted here.

  The distribution board monitoring system 20 according to the second embodiment includes a distribution board monitoring device 22 that can be installed on the distribution board 11, and the distribution board monitoring device 22 is smart via the “B route”. It is comprised so that the interruption | blocking information relevant to the opening / closing operation | movement of the meter 60 may be acquired. In general, the “B route” refers to a route for transmitting information data from the smart meter 60 to a controller, device, or the like in the distribution facility (so-called local). In addition, even if it is not B route | root, the structure by which the distribution board monitoring apparatus 22 directly inputs the contact signal etc. which the switch of the smart meter 60 outputs, and acquires interruption | blocking information may be sufficient.

  That is, in this embodiment, the distribution board monitoring device 22 outputs a signal output from the smart meter 60 after the smart meter 60 detects an overcurrent and shuts off the power supply and then recovers (returns on) power after a certain time. The block information is acquired based on The distribution board monitoring device 12 analyzes this interruption information, thereby providing notification information such as an overcurrent value [A], a rated current ratio [%], an overcurrent duration [second], etc. at the time of power failure to an external HEMS. Informs the controller 70, the portable terminal 71 (smart phone, tablet PC) and the like.

  According to the distribution board monitoring system 20 of the second embodiment as described above, the user is notified of the contents such as overcurrent at the time of a power failure based on the accurate cutoff information output directly from the smart meter 60. Can do. As a result, the user can know accurate information regarding the power failure, and can take a quick and accurate initial response.

(Third embodiment)
FIG. 4 is a block diagram showing a main configuration of the distribution board monitoring system 30 and its surroundings according to the third embodiment of the present invention. The distribution board monitoring system 30 according to the third embodiment uses the same smart meter 60 as that described in the first embodiment, and the description thereof is omitted here.

  The distribution board monitoring system 30 according to the third embodiment includes a distribution board monitoring device 32 that can be installed on the distribution board 11, and the distribution board monitoring device 32 includes the primary side sensor 14 of the distribution board 11. Based on the measured value (current value and / or voltage value) obtained in the above and the state of the main breaker 13 in the distribution board 11, it is possible to determine the cause of power failure.

As in the first embodiment described above, the distribution board monitoring device 32 monitors the output (current value and / or voltage value) of the primary side sensor 14 of the distribution board 11, thereby providing the smart meter 60 side. The state can be simulated. For example, if the current value detected by the primary sensor 14 is below the rating, it can be determined that the current limiter 64 of the smart meter 60 is “closed”, that is, energized.
In addition, the distribution board monitoring device 32 can detect the open / closed state of the main breaker 13 from the current value and voltage value (that is, the amount of supplied power) detected by the primary side sensor 14. Further, the distribution board monitoring device 32 may detect the open / closed state of the main breaker 13 based on the measurement values detected by the primary side sensor 14 and the secondary side sensor 15.

  In order to determine the cause of a more detailed power failure, the distribution board monitoring device 32 may input a trip signal output when an overvoltage occurs due to leakage in the load-side wiring facility or phase balance. . The trip signal may be input to the distribution board monitoring device 32 from a leakage detection circuit or an overvoltage detection circuit provided in the distribution board 11, or if the main breaker 13 has a leakage detection function or an overvoltage detection function. Alternatively, it may be input to the distribution board monitoring device 32 from the output terminal of the main breaker 13. Further, if the distribution board monitoring device 32 has a built-in leakage detection circuit or overvoltage detection circuit, the load side leakage or overvoltage is detected from the measured value obtained by the secondary sensor 15 of the main breaker 13. Also good.

  Next, the power failure factor determination process by the distribution board monitoring device 32 according to the third embodiment will be described in more detail with reference to the flowchart of FIG. In the following description, “ON” means an energized state in which the switch is “closed”, that is, a closed circuit, and “OFF” means an interrupted state in which the switch is “open”, that is, an open circuit. And

  First, when the current limiter 64 of the smart meter 60 is turned off first and the main breaker 13 of the distribution board 11 is turned on, the distribution board monitoring device 32 loads the load (step S11: YES). It is determined that a power failure has occurred due to overcurrent on the side (step S12). In that case, the notification means of the distribution board monitoring device 32 notifies the user that a power failure has occurred due to overcurrent, that is, overuse of electricity (step S13). As a result, it is possible to prompt the user to take action such as reviewing the usage state of the load device.

  In addition, when the main breaker 13 is turned off and the power is interrupted with the current limiter 64 of the smart meter 60 turned on (step S14: YES), the distribution board monitoring device 32 is not caused by at least an overcurrent. Then, it is determined that a power failure has occurred due to some wiring abnormality on the load side (step S15). The open / close state of the current limiter 64 of the smart meter 60 can be determined by simulation using the current value detected by the primary sensor 14. For example, if the current value detected by the primary sensor 14 immediately before the power failure is below the rating, it can be determined that the current limiter 64 of the smart meter 60 is in the ON state.

  In this case, the distribution board monitoring device 32 can further determine the cause of the power failure based on the presence or absence of a trip signal. If the leakage means or overvoltage trip signal is generated in the distribution board 11, the notification means of the distribution board monitoring device 32 warns the user that the leakage or overvoltage is abnormal (step S16). As a result, it is possible to avoid danger by promptly prompting the user to make a repair request to the electric construction company and refraining from re-inserting the breaker.

  If a power failure occurs when both the current limiter 64 and the main breaker 13 of the smart meter 60 are ON (step S17: YES), the distribution board monitoring device 32 determines that the system is abnormal. (Step S18). In this case, the notification means can notify the power company of the occurrence of a power failure through the HEMS controller 70 together with the user's portable terminal 71 (step S19).

  According to the distribution board monitoring system 30 of the third embodiment, even if information is not obtained from the smart meter 60 when a power failure occurs, the cause of the power failure is on the system side or the load side. It can be determined in more detail and notified to the user or the like. As a result, the user can know accurate information regarding the power failure, and can take a quick and accurate initial response.

  In addition to the above, the primary main current may be measured every predetermined time as the determination of the interruption of the smart meter 60 on the distribution board 11 side. The distribution board monitoring device can make a simulation determination that the current limiter 64 is interrupted by an overcurrent when the current value measured every predetermined time continues to be equal to or higher than the rating.

10, 20, 30 Distribution panel monitoring system 11 Distribution panel 12 Distribution panel monitoring device 13 Main breaker 14 Primary sensor 15 Secondary sensor 60 Smart meter 61 Communication unit 62 Display unit 63 Measurement unit 64 Current limiter 70 HEMS Controller 71 Mobile terminal (smartphone, tablet PC)

Claims (9)

A distribution board monitoring system provided in a distribution board supplied with power from a commercial system via a smart meter having a current limiting function,
A distribution board monitoring system comprising a monitoring device that acquires blocking information related to the opening / closing operation of the smart meter.   The distribution board monitoring system according to claim 1, further comprising an informing unit that informs outside of the interruption information at that time after the smart meter cuts off power supply and recovers power.   The distribution board according to claim 1 or 2, wherein the monitoring device acquires the cutoff information based on an overcurrent value detected by a sensor on a main primary side of the distribution board and a time during which the overcurrent has continued. Monitoring system.   The distribution board monitoring system according to claim 1 or 2, wherein the monitoring device acquires the cutoff information based on a signal output by the smart meter.   The monitoring device is configured to be able to determine a cause of a power failure from a relationship between a measured value detected by a sensor on the primary side of the distribution board and an open / closed state of the main breaker. The distribution board monitoring system according to any one of the above.   6. The monitoring device according to claim 5, wherein when the current value detected by the primary sensor on the primary side when a power failure occurs is less than or equal to a predetermined value, the monitoring device determines that the cause of the power failure is due to a factor other than an overcurrent. Distribution board monitoring system.   The distribution board monitoring system according to claim 6, wherein the monitoring device determines that the cause of the power failure is an abnormality on the load side based on an input trip signal of the main breaker. A distribution board to which power is supplied from a commercial system via a smart meter having a current limiting function,
A distribution board comprising a monitoring device for obtaining shut-off information related to the opening / closing operation of the smart meter. A distribution board monitoring device that can be installed on a distribution board supplied with power from a commercial system via a smart meter having a current limiting function,
A distribution board monitoring device that acquires shut-off information related to the opening / closing operation of the smart meter.

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