JP2016185004A - Communication system and distribution board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication system capable of allowing a user to comprehend the reason of a power failure.SOLUTION: The communication system includes: a communication section that acquires a piece of measurement information from a smart meter which shuts off the electric power supply when an instantaneous current value exceeds a predetermined threshold level; and a notification section that generates a piece of power failure notification based on a result of comparison of the instantaneous current value which is received by the communication section from the smart meter to the predetermined threshold level.SELECTED DRAWING: Figure 2

Description

  Embodiments described herein relate generally to a communication system and a distribution board.

  Patent Document 1 discloses a power failure information collection management system using a smart meter. Patent Document 2 discloses a system that acquires a current voltage value from a sensor of a smart meter, an indoor line, and a lead-in line, identifies the cause of a power failure, and notifies the user of the cause.

JP2013-042609A JP2015-002498A

By the way, when a smart meter is introduced into a dwelling unit, it is conceivable that power supply is cut off by the smart meter when the instantaneous current of the dwelling unit exceeds the contracted amperage value. However, since it is difficult for the user to identify whether there is a local power outage, excessive contract amperage, or leakage in the home, an appropriate countermeasure may be delayed.

  The communication system of the present embodiment includes a communication unit capable of acquiring measurement information from a smart meter that cuts off power supply when the instantaneous current value exceeds a predetermined threshold, and an instantaneous current value that the communication unit receives from the smart meter. A notification unit that generates a power failure notification based on a result of comparison with a predetermined threshold.

According to this embodiment, the reason for a power failure can be grasped.

1 is a connection configuration diagram of a system according to the first embodiment. Functional configuration diagram of a terminal according to the first embodiment FIG. 1 is an operation flow diagram of a normal communication system according to the first embodiment. FIG. 1 is an operation flow diagram of a normal communication system according to the first embodiment. Operation flow diagram of communication system after power failure recovery according to the first embodiment Operation flow diagram of communication system at power failure according to the second embodiment FIG. 3 is an exemplary diagram of a display screen according to the first embodiment. FIG. 3 is an exemplary diagram of a display screen according to the first embodiment. FIG. 3 is an exemplary diagram of a display screen according to the first embodiment. FIG. 3 is an exemplary diagram of a display screen according to the first embodiment. FIG. 3 is an exemplary diagram of a display screen according to the first embodiment. FIG. 3 is an exemplary diagram of a display screen according to the first embodiment. FIG. 3 is an exemplary diagram of a display screen according to the first embodiment. Connection diagram of a system according to the second embodiment Functional configuration diagram of the power storage system according to the second embodiment Functional configuration diagram of a control device according to the second embodiment Functional block diagram of distribution board according to the first embodiment

A communication system according to an embodiment of the present invention includes a communication unit capable of acquiring measurement information from a smart meter that cuts off power supply when an instantaneous current value exceeds a predetermined threshold, and an instant at which the communication unit receives from the smart meter. A notification unit configured to generate a power failure notification based on a result of comparing the current value with a predetermined threshold value.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1, 2, and 14 to 17, solid lines and solid line arrows indicate the direction of power wiring and power supply, and dotted lines and dotted line arrows indicate the direction of signal wiring and signal transmission.

(First embodiment)
1 and 2 show a configuration of a HEMS system 1 in a house as an example of the present embodiment.

The HEMS system 1 includes a system power supply 8 that supplies commercial power, a smart meter 7 that monitors power usage in the home, a distribution board 61 that supplies power supplied from the system power supply 8 to the branch circuit, A communication device 40 that communicates with at least one smart meter 7 and transmits a notification to the terminal 5 is connected to at least one load 9a connected to a branch circuit of the panel 61 and supplied with operating power. At this time, since the operating power of the communication device 40 is supplied via the distribution board 61 in the same manner as the load 9, it may be regarded as the load 9a.

  The communication device 40 includes a communication unit (not shown) that communicates with the smart meter 7, the terminal 5, the distribution board 61, the load 9a, and the like, and a control unit that controls the load 9 (not shown). The communication unit transmits and receives information necessary for information processing of the communication device 40 or the terminal 5 using an arbitrary communication method such as wired or wireless. For example, the communication with the smart meter 7 using wireless communication at 920 MHz, the terminal 5, the distribution board 61, and the load 9 a use Bluetooth (registered trademark) or wifi to send and receive information. Different communication means or protocols may be used. The control unit generates a control screen for operating the load 9a corresponding to the home network, sends and receives commands, acquires information from the load 9a or the distribution board 61, and the smart meter 7 via the communication unit, and monitors the monitor screen. Is generated. Specifically, as a general function required for remote control, when a control command is received from the terminal 5, the control command is interpreted, and the load 9a is brought into a predetermined operating state according to the contents included in the control command. It has a control function to shift. In addition, it has a function of acquiring information on power consumption from the smart meter 7 every predetermined time.

Furthermore, the communication device 40 may have a function of transmitting and receiving information by connecting to a public line. For example, when remote monitoring control is performed using the terminal 5 from outside the house, a control command or a request for a monitoring screen is transmitted to the communication device 40 via a public line. In addition, weather information, regional information, etc. may be obtained from the public line and presented to the user, and power supply information, power bill information, user contract information, shut-off information, contact information, etc. from the power company are realized. It is also possible to acquire information required for

  The terminal 5 is a general terminal having a display function and a communication function, such as a PC, a tablet, a smartphone, and a television equipped with a web browser. The user can monitor and control the smart meter 7, the distribution board 61, and the load 9 a through the communication device 40 using the display function of the terminal 5. When the power failure notification is received, the power failure notification is presented to the user in a pop-up display using the Web browser of the terminal 5 or an application installed in the terminal 5. The display format is not limited to this embodiment.

  FIG. 2 is a block diagram illustrating an example of a functional configuration of the terminal 5 according to the first embodiment. The terminal 5 includes a communication unit 51 that communicates with the communication device 40 or a public line, a determination unit 52 that determines the reason for a power failure, a notification unit 53 that generates a power failure notification, a control unit 54 that controls the load 9, It comprises. Some of these functions may be provided outside the terminal 5, for example, the communication device 40.

  The communication unit 51 transmits and receives information necessary for the processing of the determination unit 52 and the control unit 54 using an arbitrary communication method such as wired or wireless. For example, it may be possible to use different communication means or protocols depending on the counterpart device, such as transmitting and receiving information using the communication device 40 and Bluetooth (registered trademark) or wifi. Note that the communication unit 51 can acquire information related to power supply via a public line.

  The determination unit 52 determines the reason for the power failure based on the information acquired by the communication unit 51. Reasons for the power failure include, for example, a regional power failure due to a failure of the local power distribution network, a ground power failure due to a leakage in the house, and a cut-off power failure in which power supply is interrupted by the smart meter 7 because the instantaneous current value exceeds a predetermined threshold. The predetermined threshold in the interruption power failure is, for example, a contract current value between the user and the electric power company. The means for determining the reason for power failure will be described later in the operation flow.

  The notification unit 53 generates a power failure notification according to the determination of the determination unit 52. The generated power failure notification is notified to the user by a display unit (not shown) of the terminal 5, for example.

The control unit 54 generates a command related to the monitoring control of the load 9a in accordance with a user instruction, and transmits the command to the load 9a from the communication unit 51 directly or via the communication device 40. Further, when a response related to the monitoring control is received directly from the load 9a or via the communication device 40, the display screen is displayed. The display screen may be generated by the control unit 54 or the communication device 40.

The distribution board 61 is equipped with a circuit breaker that receives power supply from the system power supply 8 to supply power to the load 9a and shuts off the circuit when a leakage is detected. As shown in FIG. 17, the distribution board 61 receives a system power supply by the main circuit 62, supplies power to the load 9 a via the branch circuit 63, and measures a main measurement unit 65 that measures power information of the main circuit 62. A branch measurement unit 64 that measures power information of the circuit 63 is included. In addition, a branch measurement unit (not shown) that measures power information for each main trunk or branch circuit and a transmission unit (not shown) that transmits power information to a request source according to a request from the communication device 40 or the terminal 5 are provided.

The smart meter 7 monitors the power usage status in the home, responds to information requests from the communication device 40, and cuts off the power supply when the instantaneous current value supplied from the system power supply 8 to the home exceeds a predetermined threshold. Has a limiter function. Here, the smart meter 7 automatically returns the power supply when a predetermined time elapses unless the number of shut-off times by the limiter function reaches the limit number, and requires a passive return by the user when the number of shut-off times reaches the limit number. It is possible. The passive return may be, for example, a method in which a user calls an electric power company and requests a home power return. In this case, it is necessary to convey to the electric power company user information such as a customer number for specifying the home smart meter 7. The smart meter 7 has a function of transmitting the accumulated power consumption for a predetermined time to the communication device 40 every predetermined time.

The system power supply 8 is a power supply supplied from an electric power company, for example, and supplies operating power to the load 9 a and the communication device 40 via the smart meter 7 and the distribution board 61.

The load 9 a is a general electric device that receives operating power from the system power supply 8 via the distribution board 61. Although not shown in FIG. 1, if the home network can be supported, information is transmitted / received to / from the communication device 40 using an arbitrary communication method such as wired or wireless, and according to a control command received from the communication device 40. Be controlled. In addition, a load 9a that can be used for the home network and a load 9a that is not supported for the home network may be mixed.

  An example of an operation flow of the communication system according to the present embodiment will be described with reference to FIGS. 7 to 13 show display examples of a power failure notification on the terminal 5. FIG.

  The flow in FIG. 3 starts when the user activates a current value monitoring application installed in the terminal 5, for example.

Note that the flow of FIG. 3 may be started by the flow of FIG. In FIG. 4, the communication unit 51 acquires the integrated power consumption E for 30 minutes from the smart meter 7 every 30 minutes (S41, S42, S43), and the acquired integrated power consumption E value exceeds a predetermined threshold value. It may be configured to automatically determine whether or not to activate the flow of FIG. 3 depending on whether or not (S44). Here, the predetermined threshold value may be set in advance, or may be configured to be settable by the user. Any configuration of the present system may be acquired by inquiring an external server via the smart meter 7, the communication device 40, or a public line.

Returning to the description of FIG. First, the communication unit 51 acquires the instantaneous current value a from the smart meter 7 every 5 minutes (S311, S32, S33), and calculates the ratio between the instantaneous current value a and the contract current value A (S34). Here, the contract current value A is a numerical value determined according to a contract between the user and the electric power company, and may be input by the user by application guidance, or any configuration of the present system may be the smart meter 7, the communication device. It may be obtained by inquiring of an external server via 40 or a public line. An example of a display screen displayed on the terminal 5 at this time is shown in FIG. In the display screens of FIGS. 7 to 13, the ratio of the contract current value A, the instantaneous current value a, and the contract current value A is displayed as a bar graph. However, the embodiment is not limited to this, and for example, the ratio is not a ratio. The current value may be displayed, and any display method such as numbers, meters, the number of icons, and colors may be employed.

  Next, it is determined whether the ratio between the instantaneous current value a and the contract current value A (hereinafter referred to as current value ratio) falls within a numerical range divided by 100% and 125%, and a power failure notification is generated with a different notification pattern (S35). To S38).

  For example, if the current value ratio exceeds 100% but has not reached 125%, as shown in Fig. 8, "The power used has reached the contracted amperage. If you continue to use it, the power will be stopped. A power outage notification including information such as “.” Is generated. Here, branch power consumption may be acquired from the distribution board 61, and a device confirmation button for guiding to a screen for confirming the power consumption of each device may be presented simultaneously. Further, the specific information of the load 9a having the largest power consumption may be directly presented from the power consumption for each branch acquired from the distribution board 61, or may be guided to the power consumption monitoring screen for each branch. If the load 9a can be controlled by the control unit 54, the load 9a may be guided to the control screen of the load 9a.

  When the current value ratio exceeds 125%, as shown in Fig. 9, a power failure notification that includes information such as "Specified power has exceeded the contracted amperage. If you continue to use it, the power will be stopped." Is generated. Here, the remaining time until the power failure in the current value ratio may be presented at the same time. The remaining time until the power failure may be set in accordance with the ratio of the instantaneous current value, and may be guided by the user to store the automatic return time in a storage unit (not shown) of the system 1, The configuration may be acquired by inquiring an external server via the smart meter 7, the communication device 40, or the public line. Similarly to the description of S36, branch power consumption may be acquired from the distribution board 61, and a device confirmation button for guiding to a screen for confirming the power consumption of each device may be presented simultaneously. Further, the specific information of the load 9a having the largest power consumption may be directly presented from the power consumption for each branch acquired from the distribution board 61, or may be guided to the power consumption monitoring screen for each branch. If the load 9a can be controlled by the control unit 54, the load 9a may be guided to the control screen of the load 9a.

  When the current value ratio exceeds a predetermined threshold (100% or more in the present embodiment), it is determined that the possibility of a power failure is high, and the communication unit 51 shortens the period for acquiring the instantaneous current value a from the smart meter 7. It may be set (S312) to increase the frequency of power failure notification. Further, for example, the time period set to 1 minute when the current value ratio exceeds 100% and 30 seconds when the current value ratio exceeds 125% may be changed. As a result, when the instantaneous current value is close to the contract current value, a power outage notification with more immediateness is possible. In addition to changing the character string for each notification pattern, the user may intuitively grasp the tightness state by changing the color of the bar graph indicating the current value ratio or changing the notification sound. .

The indexes of 100% and 125% shown in the present embodiment are examples of numerical values and do not limit the present embodiment. For example, some notification may be given at a current value lower than 100%, or a plurality of finer indices may be present.

  Next, a system operation flow when a power failure occurs will be described with reference to FIG. When a power failure detection unit (not shown) of the HEMS system 1 detects a power failure, for example, when the operation power supply of the HEMS system 1 is stopped due to the occurrence of a power failure and then restarted due to the termination of the power failure, the flow of FIG. 5 starts (S50).

  If the communication unit 51 or the communication device 40 can receive information about a local power outage or information indicating that the user's smart meter 7 has cut off power supply from the smart meter 7 or via a public line, the power outage It can be judged whether it is a local power outage or an interruption power outage. For example, when information on the planned power failure has been acquired in advance (S51), the determination unit 52 determines whether the power failure is a regional power failure in comparison with the time zone of the planned power failure (S52). Alternatively, when information on the occurrence of a local power failure is acquired from an external server after a power failure (S51), the determination unit 52 determines that the power failure is a regional power failure (S52). Further, for example, by receiving information that the instantaneous current value of the user's home exceeds the contract current and the smart meter 7 has cut off the power supply, directly or from an external server before or after the power failure. (S53) It is also possible to determine that the interruption is a power failure (S54).

  In addition, when the information of S51 and S53 cannot be received, whether or not the power failure occurs due to the smart meter 7 depending on whether the time from the occurrence of the power failure to the return of power matches the automatic recovery time set in the smart meter 7 or not. It is possible to determine whether or not (S56). The specification of the automatic return time set in the smart meter 7 is usually determined by the electric power company, and the user may be guided to store the automatic return time in a storage unit (not shown) of the system 1. An arbitrary configuration may be acquired by inquiring an external server via the smart meter 7, the communication device 40, or the public line. The time from the occurrence of a power failure to the return of power may be calculated from the communication disconnection time of the communication device 40 and the smart meter 7 by the terminal 5, or a timer is provided in the communication device 40 or the smart meter 7 to cut off the power supply. The measured period may be measured.

  In addition, when the judgment part 52 judges that the said power failure is a power failure (S54), the count of the frequency | count of interruption displayed on the terminal 5 is increased once (S55). Does not count in block count. The number of shut-off times is configured to return to 0 when a predetermined count period elapses, and when the limit number is reached during the count period, it is considered that automatic return cannot be performed. The count period and the limit count are determined by the normal electric power company in the same way as the automatic return time, and may be guided by the user to store the automatic return time in a storage unit (not shown) of the system 1 May be obtained by inquiring an external server via the smart meter 7, the communication device 40, or the public line.

If the information about the local power failure or the information indicating that the user's smart meter 7 has been cut off has not been received and the time until return does not coincide with the automatic return time, it is determined that the breaker has been cut off due to electric leakage (S57). .

  Finally, the notification unit 53 generates a power failure notification based on the reason for the power failure determined by the determination unit 52 (S52, S54, or S57) (S58). An example of a power failure notification generated by the notification unit 53 will be described with reference to FIGS.

  FIG. 10 shows an example of a power failure notification displayed on the terminal 5 when the determination unit 52 determines that the power failure is a power failure and the number of times of power interruption is equal to or less than the limit number. The power failure notification shown in FIG. 10 displays a warning such as “No automatic recovery next time” depending on the number of times of interruption and the number of times of interruption. Moreover, you may show so that it may understand that the electric current value ratio before electric power is interrupted | blocked by the smart meter 7 is a value before a power failure.

  FIG. 11 shows an example of a power failure notification displayed on the terminal 5 when the determination unit 52 determines that the power failure is a power failure and the number of times of power interruption reaches the limit number. The power failure notification shown in FIG. 11 informs that the number of interruptions has reached the limit number and information necessary for passive return. Information required for passive return varies depending on the electric power company. For example, when it is necessary to apply by telephone, it is conceivable to present the telephone number, or to provide a link to the application page when it is necessary to apply from the Internet. Moreover, you may show the information etc. which identify the user required for passive return simultaneously.

  FIG. 12 shows an example of a power failure notification displayed on the terminal 5 when the determination unit 52 determines that the power failure is a regional power failure. In the power failure notification shown in FIG. 12, information that the power failure is a regional power failure and information on the planned power failure are displayed if the power failure is a planned power failure. Moreover, you may show so that it may understand that the electric current value ratio before a power failure is a value before a power failure.

FIG. 13 shows an example of the power failure notification displayed on the terminal 5 when the determining unit 52 determines that the power failure is a regional power failure. In the power failure notification shown in FIG. 13, information indicating that “an abnormal current value has been detected” and confirmation of a device that has detected the abnormal current value is presented. Here, for example, branch power consumption may be acquired from the distribution board 61, and a device confirmation button for guiding to a screen for confirming the power consumption of each device may be presented simultaneously. Alternatively, the specific information of the load 9a having a high possibility of electric leakage may be directly presented from the current value history for each branch acquired from the distribution board 61, and if the load 9a can be controlled by the control unit 54, You may guide to the control screen of the load 9a.

(Effects of the first embodiment)

According to the present embodiment, in a house equipped with a smart meter, it is possible to examine the solution by knowing the reason for the power failure, to monitor the difference between the instantaneous current value and the contract current value, and to store information on the branch circuit. Appropriate responses can be made by referring to them together. When the operation of the load connected to the branch circuit is changed or the presence / absence of electric leakage is confirmed, the operation can be performed while grasping the time until the power is cut off or the time from power failure to automatic recovery. In addition, by counting the number of times of interruption, an effect of alerting can be expected, and necessary information can be presented to the user when passive return of power supply is necessary.

(Second Embodiment)
This embodiment demonstrates the case where electric power is supplied to the HEMS system 1 also at the time of a power failure. The overall system diagram of the second embodiment will be described with reference to FIG. 14, and the same components as those of the first embodiment will be denoted by the same reference numerals and detailed description thereof will be omitted.

The HEMS system 1 according to the second embodiment receives power from the power generation system 20 having a self-sustaining operation function and the system power supply 8 or the power generation system 20 at the time of a power failure, and discharges it in an emergency or as required by the user. The power storage system 30 includes at least one load 9b to which operating power is supplied by the system power supply 8 or the distributed power supply (the power generation system 20 or the power storage system 30) via the distribution board 62. In this case, the communication device 40 further has a function of controlling storage / discharge of the power storage system 30.

The power generation system 20 is a power generation system that cooperates with the system power supply 8 and has a self-sustaining operation function during a power failure. In this embodiment, a solar power system equipped with a solar power generation module will be described as an example of the power generation system 20. However, for example, a distributed power source that creates power using other energy sources such as a fuel cell system and a wind power generation system is used. You may apply. The power generation system 20 includes a power conditioner (not shown), and converts the power generated by the solar panel into, for example, AC 100V power. The generated power generated by the power generation system 30 can be stored in the power storage system 30 and can be reversely flowed to the system power supply 8 under the control of the communication device 40.

  When the power storage system 30 is connected to the system power supply 8, the power storage system 30 can receive and store the system power, and is connected to the power generation system 30 and created during the time when the power generation system 3 is generating power. It is also possible to store the generated power. The stored power is supplied to the power distribution system 7b via the power storage system distribution board 62 when the autonomous operation function is executed under the control of the communication device 40, such as when the system power supply 6 fails. FIG. 15 is a block diagram illustrating an example of a functional configuration of the power storage system 30 according to the second embodiment. The power storage system 30 includes a monitoring unit 31, a switching unit 32, a storage battery 33, a charge / discharge execution unit 34, and a power failure detection unit 35.

  The monitoring unit 31 monitors the voltage supplied from the power conditioner of the power generation system 20 to the power storage system 30 and outputs a monitor signal indicating the monitoring result. And the electrical storage system 30 transmits the monitor signal output from the monitoring part 31 to the control apparatus 40 via the communication unit which is not shown in figure. The communication unit may transmit the monitor signal to the control device 40 only when the monitor signal is changed, or may transmit the monitoring result as needed. In addition, the monitor signal in the present embodiment may be, for example, a signal indicating that a predetermined threshold is exceeded or decreased, or a signal indicating the voltage value itself.

  When the power failure detection unit 35 detects a power failure, the switching unit 32 supplies the power output by the self-sustaining operation function of the power generation system 20 via the distribution board 61 and the storage system distribution board 62. To supply. Specifically, it is arranged in the middle of the power line connecting the distribution board 61 and the electricity storage system distribution board 62, and the cooperation between the electricity distribution board 61 and the electricity storage system distribution board 62 is cut off during a power failure. At this time, power is supplied to the selected load 9b via the power line and the electricity distribution system distribution board 62.

  In addition, the switching unit 32 supplies the power supplied from the power conditioner of the power generation system 20 to the power supplied to the selected load 9b via the power storage system distribution board 62 in response to an instruction from the communication device 40, or It is also possible to switch to any one of the electric power discharged from the power storage system 30. Specifically, when the switching unit 32 receives a storage battery discharge stop instruction from the communication device 40, the switching unit 32 supplies the power supplied to the selected load 9 b via the power storage system distribution board 62 to the power condition of the power generation system 20. Switch to the power supplied from NA. Further, when the switching unit 32 receives an instruction to start discharging the storage battery from the control device 40, the switching unit 32 converts the power supplied to the selected load 9 b through the power storage system distribution board 62 to the power stored in the power storage system 30. Switch.

  The storage battery 33 stores the power generated by the power generation system 20. Specifically, it is a rechargeable secondary battery such as a lithium ion battery.

  The charging / discharging execution unit 34 charges the storage battery 33 with the charging power value included in the charging instruction received from the communication device 40 out of the power supplied from the power generation system 20 or the system power supply 8. Here, the instruction content from the communication device 40 may be a charging current value. The charge / discharge execution unit 34 stops charging the storage battery 33 when instructed to stop charging from the communication device 40. Note that transmission / reception of signals to / from the communication device 40 may be performed via a communication unit provided in the power storage system 30.

  The power failure detection unit 35 monitors the presence or absence of power supply from the distribution board 61, and outputs a power failure detection signal when detecting that the power supply has been interrupted. Then, the power storage system 30 transmits the power failure detection signal output from the power failure detection unit 35 to the communication device 40.

The load current measuring device 36 measures the load current or load power (total value of current consumed by the selected load or total value of power) supplied to the power line connected to the electricity distribution system distribution board 62, A signal indicating the measured load current or load power is transmitted to the communication device 40 via a communication unit (not shown). That is, the load current measuring device 36 measures the power supplied to the load 9 (selected load 9b) at the time of a power failure, and transmits the measurement result to the communication device 40.

  FIG. 16 shows a functional configuration diagram of the communication device 40. The description of the same function described in the first embodiment is omitted. When the communication device 40 receives a signal indicating the occurrence of a power failure from the power failure detection unit 35 of the power storage system 30, the communication device 40 transmits the power output by the self-sustaining operation function of the power generation system 20 via the power distribution system distribution board 62. The power storage system 30 is controlled so as to be supplied to emergency electrical wiring and a power outlet and / or charged for the power storage system 30.

  Moreover, the communication apparatus 40 may have an input reception part, a screen display part, etc. which are not shown in figure which receive the storage discharge instruction, operation setting, etc. of the storage battery 33 by a user. In that case, the received instruction information is sent to the control unit 41.

  The communication unit 41 transmits and receives information necessary for processing of the determination unit 43, the detection unit 42, and the control unit 44 using an arbitrary communication method such as wired or wireless, so that the monitoring unit 31 of the power storage system 30 performs charge / discharge execution. Unit 34, power failure detection unit 35, load current measuring device 36, or other functions.

  When the power failure detection unit 35 of the power storage system 30 detects a power failure, the detection unit 42 measures the load current or load supplied to the power line connected to the power distribution system distribution board 62 measured by the load current measuring device 36. A signal indicating power (total value of current consumed by the selected load or total value of power) is received via a communication unit (not shown). That is, the detection unit 42 acquires the load power supplied from the power storage system 30 or the power generation system 20 to the load 9 (selected load 9b) via the power storage system 30 at the time of a power failure.

  The determination unit 43 compares the maximum generated power value of the power generation system 20 stored in a storage unit (not shown) with the load power supplied to the load 9b acquired by the detection unit 42, and the load power is the maximum of the power generation system 20. It is determined whether or not the supply power is exceeded.

  The control unit 44 transmits an instruction signal including a predetermined charging power value to the charge / discharge execution unit 34 or the switching unit 32 of the power storage system 30 via the communication unit 41 according to the determination of the determination unit 43, thereby Control. Specifically, when the determination unit 43 determines that the load power supplied to the load 9b exceeds the maximum power supply power of the power generation system, the storage system 30 is controlled to discharge and supply power to the load 9b, and supplied to the load 9b. When the determination unit 43 determines that the load power to be output does not exceed the maximum power supply power of the power generation system, the power generation system 20 is controlled to supply power to the load 9b.

  When the power failure detection unit 35 of the power storage system 30 detects a power failure, the control unit 44 first controls the power storage system 30 to supply power to the load 9b, and then performs the above control according to the determination of the determination unit 43. It is preferable.

When the determination unit 43 determines that the load power supplied to the load 9b does not exceed the maximum power supply power of the power generation system when the power failure detection unit 35 of the power storage system 30 detects a power failure, The power storage system 30 may be controlled such that the power generation system 20 supplies power to the load 9b and stores the power storage system 30 within a range of surplus generated power obtained by subtracting the power supplied to the load 9b.

The load 9a supplied with power through the distribution board 61 preferably includes, for example, a washing machine, a television set, an air conditioner, etc., which have a low use priority and a small current change in an emergency. Moreover, it is preferable that the load 9b fed by the power storage system 30 through the storage battery distribution board 62 in an emergency includes a device that requires electric power even in an emergency, such as a refrigerator or a lamp. In the present embodiment, the communication device 40 is connected to the storage battery distribution board 62 as the selected load 9b, and operates by receiving power from the power storage system 30 during a power failure.

The system power supply 8 is a power supply supplied from an electric power company, for example, and supplies power to the load 9a and the load 9b via the distribution board 61 and the storage system distribution board 62.

  The load 9 is a general electric device. In the present embodiment, the load 9 is classified into a general load 9a and a selected load 9b according to priority in an emergency, and the general load 9a is fed from the distribution board 61 and the selected load 9b is fed from the distribution board 62 for the power storage system. Configured as follows.

When power is supplied from the system power supply 8, the distribution board 61 supplies power to the general load 9 a through a normal electrical wiring outlet, and the selected load 9 b through the power storage system 30 and the distribution board 61. Power to The electricity storage system distribution board 62 supplies the electric power received from the electricity storage system 30 to the selected load 9b via an emergency electrical wiring or outlet. In the event of a power failure, the power output by the self-sustaining operation function of the power generation system 20 is preferentially charged to the selected load 9b and / or the power storage system 30 via the power storage system distribution board 62 and emergency electrical wiring and outlets. Supply to fill.

The HEMS system 1 of the present embodiment configured as above preferentially supplies the power generated by the power generation system 20 to the selected load 9b at the time of a power failure, while adjusting the charging power value with the remaining power. Since it is stored in the storage battery of the power storage system 30, the discarded power can be reduced as much as possible, and the power generated by the power generation system 20 can be used efficiently. It should be noted that the present invention does not include the electricity distribution system distribution board 62 and may be implemented in the form of the distribution board 61 alone.

  A system operation flow when a power failure occurs in the present embodiment will be described with reference to FIG. When a power failure is detected, for example, when the power supply of the system 1 is stopped due to the occurrence of a power failure and the power failure ends or the system is restarted by the distributed power supply, the flow of FIG. 6 is started. Further, for example, when a power failure detection signal is received from the power failure detection unit 35 of the power storage system 30, the operation shown in the flowchart of FIG. 6 may be started (S60).

  If the communication unit 51 or the communication device 40 can receive information about a local power outage or information indicating that the user's smart meter 7 has cut off power supply from the smart meter 7 or via a public line, the power outage It can be judged whether it is a local power outage or an interruption power outage. For example, when the information on the planned power failure has been acquired in advance (S61), the determination unit 52 determines whether the power failure is a regional power failure in comparison with the time zone of the planned power failure (S62). Alternatively, when information on the occurrence of a local power failure is acquired from an external server after the power failure (S61), the determination unit 52 determines that the power failure is a regional power failure (S62). Further, for example, by receiving information that the instantaneous current value of the user's home exceeds the contract current and the smart meter 7 has cut off the power supply, directly or from an external server before or after the power failure. (S63) It is also possible to determine that it is a cut-off power (S64).

  In addition, when the smart meter 7 operates by receiving only power supply from the system power supply 8 and does not have a backup power supply for supplying power in the event of a regional power failure, based on whether or not communication with the smart meter 7 is possible in S61, It can also be determined whether it is a regional power outage or a power outage power outage by the smart meter 7.

  If the information described in S61 and S63 cannot be received, it can be estimated from the power consumption information received before the power failure received from the smart meter 7 whether or not the power failure has occurred (S66). , S64). Here, an example has been described in which the smart meter 7 or the communication device 40 is determined based on the power consumption history on the assumption that the accumulated power consumption every 30 minutes is stored. However, the embodiment is not limited to this, for example, When the user has activated the current value monitoring application installed in the terminal 5, the determination may be made based on the acquired instantaneous current value a as described with reference to FIG. Moreover, when the measurement unit is installed in the dwelling unit, power information collected from the measurement unit may be used as a determination material.

  If the information indicating that there is a regional power failure or a power failure is not received and the power consumption before the power failure is not increased, it is determined that the breaker is interrupted due to a leakage (S67).

  When the determination unit 51 determines that the power failure is caused by a power failure (S64), the number of times of power interruption displayed on the terminal 5 is increased by one (S65). Do not count.

Finally, the notification unit 53 generates the power failure notification of FIGS. 11 to 13 described in the first embodiment based on the power failure reason (S62, S64, or S67) determined by the determination unit 52 (S68).

(Effect of 2nd Embodiment)

According to the second embodiment, the reason for the power failure can be known without waiting for the power failure to recover.

DESCRIPTION OF SYMBOLS 1 ... Communication system 51 ... Communication part 53 ... Notification part

Claims (9)

A communication unit capable of acquiring measurement information from a smart meter that cuts off power supply when the instantaneous current value exceeds a predetermined threshold;
Based on the measurement information that the communication unit receives from the smart meter, a notification unit that generates a power failure notification,
A communication system. The notification unit
The communication system according to claim 2, wherein the communication unit generates a power failure notification based on a result of comparing an instantaneous current value received from the smart meter with a predetermined threshold value. The communication unit is
The communication system according to any one of claims 1 and 2, wherein the frequency of acquiring information from the smart meter is increased when it is determined that the possibility of a power failure is high based on the measurement information acquired from the smart meter. The notification unit
The communication system according to any one of claims 1 to 3, wherein a power failure notification is generated that includes information on a number of times of interruption of power supply by the smart meter within a predetermined period. Based on the information acquired via the communication unit or public line, further comprising a determination unit for determining the reason for the power outage,
The notification unit
The communication system according to any one of claims 1 to 4, wherein a power failure notification including a power failure reason determined by the determination unit is generated. The determination unit
The communication system according to claim 5, wherein the reason for a power failure is determined based on measurement information measured by the smart meter. A communication unit that acquires measurement information from a smart meter that cuts off power supply when the instantaneous current value exceeds a predetermined threshold, and acquires the branch power information from a branch measurement unit that measures branch power information of the branch circuit;
A notification unit that generates a power failure notification to which information specifying a branch circuit with high power consumption is added using the branch power information based on the measurement information;
A communication system. The notification unit
The communication according to any one of claims 7 and 8, wherein the communication unit generates a power failure notification to be guided to a control screen of a device connected to a branch circuit with high power consumption based on the branch power information received by the communication unit. system. A branch measurement unit for measuring branch power information;
A receiving unit that receives measurement information from a smart meter that cuts off power supply when an instantaneous current value exceeds a predetermined threshold and receives the branch power information from the branch measurement unit; and the branch power based on the measurement information A transmission unit that transmits the branch power information to a communication system including: a notification unit that generates a power failure notification with information specifying a branch circuit with high power consumption using information;
Distribution board with.

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