Control unit and distribution board system

Abstract

To provide a control unit and a distribution board system which can achieve both convenience and safety.SOLUTION: A control unit 1 includes a seismic sensor 14, an identification unit 11, and a shutoff control unit 12. The seismic sensor 14 detects earthquakes. When the identification unit 11 detects that an autonomous operation has started and the seismic sensor 14 detects an earthquake, it identifies a branch breaker X1 as a non-power-supply target among a plurality of branch breakers 5 included in a distribution board 2. In the autonomous operation, the distribution board 2 that is supplied with power from at least one of a system power source PS1 and a distributed power source PS2 and supplies power to a load LD electrically connected thereto is not supplied with power from the system power source PS1, but supplied with power from the distributed power source PS2. The shutoff control unit 12 shuts off an electric circuit L4 between the branch breaker X1 as the non-power-supply target identified by the identification unit 11 and the load LD.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates generally to a control unit and a distribution board system, and more particularly to a control unit and a distribution board system that control branch breakers. [Background technology]

[0002] Patent Document 1 discloses a leakage current breaker interrupter device in which an earth-equipped seismic sensor switch is installed outside or inside the body of an existing distribution board and connected to the circuit of a leakage current breaker installed inside the distribution board. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-256848 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, a distribution board may be connected so that when the power supply from the grid power source is cut off (i.e., when a power outage occurs), power is supplied to the branch breaker from a distributed power source that generates or stores power in the power consumption area instead of the grid power source. In this case, even when a power outage occurs, power can be supplied from the branch breaker to the loads electrically connected to the branch breaker, ensuring convenience. On the other hand, when an earthquake occurs, it is necessary to maintain safety by not supplying power to the loads. For this reason, there is a demand for achieving both convenience and safety when the power supply from the grid power source is cut off due to an earthquake.

[0005] An object of the present disclosure is to provide a control unit and a distribution board system that can achieve both convenience and safety in the event that the power supply from the grid power source is cut off due to the occurrence of an earthquake. [Means for solving the problem]

[0006] A control unit according to an aspect of the present disclosure includes a seismic sensor, an identification unit, and a shutoff control unit. The seismic sensor detects an earthquake. The identification unit detects that an independent operation has started, and when the seismic sensor detects the earthquake, identifies a branch breaker that is not to be supplied with power among a plurality of branch breakers included in the distribution board. In the independent operation, the power is not supplied from the system power source to a distribution board that receives power from at least one of a grid power source and a distributed power source and supplies the power to an electrically connected load, but the power is supplied from the distributed power source. The shutoff control unit shuts off an electric path between the branch breaker that is not to be supplied with power identified by the identification unit and the load.

[0007] A distribution board system according to an embodiment of the present disclosure includes the above-mentioned control unit, a distribution board, and a switch. The switch switches between a first state in which power is supplied from at least the system power source among the system power source and the distributed power sources, and a second state in which the independent operation is performed. The distribution board includes a main breaker to which the power is supplied from the system power source. The main breaker is provided between the system power source and the switch. Effect of the Invention

[0008] The present disclosure has the advantage of being able to achieve both convenience and safety when a power outage occurs due to an earthquake. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a block diagram showing the configuration of a control unit according to this embodiment. [Diagram 2] FIG. 2 is a front view of the housing of the distribution board. [Diagram 3] FIG. 3 is a block diagram showing a configuration of a control unit according to a first modified example of the above embodiment. [Figure 4] FIG. 4 is a block diagram showing a configuration of a control unit according to a second modified example of the above embodiment. [Diagram 5] FIG. 5 is a block diagram showing a configuration of a control unit according to a third modified example of the above embodiment. [Figure 6] FIG. 6 is a block diagram showing a configuration of a control unit according to another modified example of the above embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (Present embodiment) (1) Overview Hereinafter, an overview of a control unit 1 according to this embodiment will be described with reference to FIG.

[0011] The control unit 1 of this embodiment controls the connection state between each of a plurality of branch breakers 5 included in a distribution board 2 that receives power from at least one of a system power source PS1 and a distributed power source PS2 and supplies power to an electrically connected load LD, and the load LD electrically connected to the branch breaker 5. In other words, the control unit 1 controls whether or not to interrupt an electric path between each of the plurality of branch breakers 5 and the load LD electrically connected to the branch breaker 5.

[0012] As shown in FIG. 1, the control unit 1 includes a seismic sensor 14, a determination unit 11, and a cutoff control unit 12. The seismic sensor 14 detects an earthquake. When the determination unit 11 detects that an independent operation has started and detects an earthquake, the determination unit 11 determines a branch breaker X1 that is not a target for power supply among a plurality of branch breakers 5 included in the distribution board 2. In the present disclosure, the term "independent operation" refers to supplying power from the distributed power source PS2 to the distribution board 2 in a state separated from the system power source PS1, that is, an operation in which power is not supplied from the system power source PS1 to the distribution board 2 but is supplied from the distributed power source PS2. The cutoff control unit 12 cuts off the electric circuit L4 between the branch breaker X1 that is not a target for power supply and that is determined by the determination unit 11 and the load LD.

[0013] Therefore, in the case where the power supply from the system power source PS1 is interrupted due to a factor other than the occurrence of an earthquake, in this embodiment, the distributed power source PS2 can supply power to the loads LD connected to each of the multiple branch breakers 5 via the distribution board 2. Therefore, convenience can be ensured in the case where the power supply from the system power source PS1 is interrupted due to a factor other than the occurrence of an earthquake.

[0014] On the other hand, in the case where the power supply from the system power source PS1 is interrupted due to the occurrence of an earthquake, in this embodiment, the distributed power source PS2 does not supply power to the loads LD connected to the branch breaker X1 that is not the target of power supply, but supplies power to the loads LD connected to the branch breakers 5 excluding the branch breaker X1 that is not the target of power supply among the multiple branch breakers 5, via the distribution board 2. As an example, in the case where the power supply from the system power source PS1 is interrupted due to the occurrence of an earthquake, the distributed power source PS2 is able to supply power to the loads LD excluding the above-mentioned loads LD, without supplying power to the loads LD (e.g., heat source equipment) that may generate heat when power is supplied.

[0015] As a result, it is possible to ensure both convenience and safety when the power supply from the power grid PS1 is cut off due to an earthquake. That is, the control unit 1 of the present embodiment has the advantage that it can achieve both convenience and safety when the power supply from the power grid is cut off due to an earthquake.

[0016] (2) Detailed configuration (2-1) Distribution Board System Hereinafter, a detailed configuration of the distribution board system 100 of the present embodiment will be described with reference to FIGS.

[0017] 1, the distribution board system 100 includes a control unit 1, a distribution board 2, and a switch 3. In this embodiment, the control unit 1 and the switch 3 are housed in a housing 20 of the distribution board 2, which will be described later.

[0018] (2-2) Distribution board (whole) The distribution board 2 is installed in consumer facilities such as detached houses, apartment buildings, factories, stores, offices, office buildings, commercial buildings, stadiums, hospitals, and schools. The distribution board 2 distributes power supplied from at least one of the system power source PS1 and the distributed power source PS2 to multiple loads LD in the consumer facilities. The distribution board 2 is installed in residences such as detached houses and apartment buildings.

[0019] The grid power source PS1 refers to a power source supplied from a power supply business such as a power company through a power distribution line. On the other hand, the distributed power source PS2 refers to a small-scale power source that is installed separately for each consumer and is supplied through the power distribution line installed at the consumer, unlike the grid power source PS1.

[0020] In this embodiment, the distributed power source PS2 includes a power generation facility 71 and a storage battery 72. That is, this embodiment will be described using an example in which three types of power sources are provided, namely, a system power source PS1, a power generation facility 71, and a storage battery 72, as shown in FIG. 1. The power generation facility 71 is a device that generates electric power, and is, for example, a device that generates power using natural energy such as solar power, wind power, hydroelectric power, and geothermal power. In this disclosure, the power generation facility 71 is assumed to be a device that generates power using solar power. The storage battery 72 is a device that charges and discharges. The power generation facility 71 and the storage battery 72 are connected to a converter 8.

[0021] As shown in Fig. 1, the distribution board 2 includes a main breaker 4 to which power is supplied from a system power source PS1, a plurality of branch breakers 5 that branch power on the load LD side of the main breaker 4, an interconnection breaker 6 connected to a primary circuit (main circuit L1) of the main breaker 4, and a switch 3 inserted between the main breaker 4 and each of the plurality of branch breakers 5 on the secondary side of the main breaker 4. That is, the main breaker 4 is provided between the system power source PS1 and the switch 3. In the example shown in Fig. 2, the distribution board 2 includes ten branch breakers 5.

[0022] As shown in Fig. 2, the distribution board 2 includes a housing 20 in the shape of a rectangular box. A rectangular opening 20a is formed in the front of the housing 20, and a cover (not shown) is attached to the opening 20a so as to be freely opened and closed. The cover is movable between a closed position that covers the opening 20a and an open position that exposes the opening 20a to the front. The housing 20 is attached to, for example, a wall or a pillar of a building.

[0023] The housing 20 accommodates a main breaker 4, an interconnection breaker 6, a switch 3, a plurality of branch breakers 5, and a control unit 1. The main breaker 4, the interconnection breaker 6, the switch 3, a plurality of branch breakers 5, and the control unit 1 are attached to a bottom plate (a plate member facing the opening 20a) of the housing 20 directly or via an attachment member or the like. Note that Fig. 2 shows an example of the arrangement of the main breaker 4, the interconnection breaker 6, the switch 3, a plurality of branch breakers 5, and the control unit 1 inside the housing 20. Note that this arrangement can be changed as appropriate.

[0024] As shown in FIG. 1, the system power supply PS1 is connected to a main circuit breaker 4 via a main circuit L1. The main circuit breaker 4 is connected to a switch 3 via a main circuit L2. The main circuit breaker 4 turns on and off the main circuit L2 between the main circuit breaker 4 and the switch 3. Specifically, a primary terminal of the main circuit breaker 4 is connected to the main circuit L1. A secondary terminal of the main circuit breaker 4 is connected to the main circuit L2 in the housing 20. The main circuit L1 and the main circuit L2 are composed of bus bars, electric wires, etc. As an example, the main circuit breaker 4 has a leakage current detection function, and turns off the main circuit L2 when the leakage current detection function detects a leakage current.

[0025] The main breaker 4 also has an operating lever 41 (see FIG. 2) for operating the conduction and interruption of the main electric circuit L2. The main breaker 4 is configured to be able to switch the main electric circuit L2 from a conducting state to a cutting state, and from a cutting state to a conducting state, in response to manual operation of the operating lever 41. For example, after a leakage current is detected and the main breaker 4 cuts off the main electric circuit L2, when a user (e.g., a resident) of the distribution board system 100 confirms safety, the user can operate the operating lever 41 to return the main electric circuit L2 to a conducting state.

[0026] As shown in FIG. 1, the main circuit L2 connected to the secondary terminal of the main circuit breaker 4 branches into a plurality of branch circuits L3 in the housing 20 via the switch 3. A plurality of branch circuit breakers 5 are connected to the plurality of branch circuit L3. Each of the plurality of branch circuit breakers 5 is connected to a load LD through an electric circuit L4 (hereinafter, also referred to as the branch circuit L4). Each of the plurality of branch circuit breakers 5 conducts and cuts off the branch circuit L4 between the branch circuit breaker 5 and the load LD of the customer facility. Specifically, the primary terminal of the branch circuit breaker 5 is connected to the branch circuit L3 branched from the main circuit L2. The secondary terminal of the branch circuit breaker 5 is connected to the branch circuit L4 drawn out of the housing 20. The load LD of the customer facility is connected to the branch circuit L4 drawn out of the housing 20. The branch circuit L3 and the branch circuit L4 are composed of bus bars, electric wires, etc.

[0027] The load LD includes an electric device directly connected to the branch electric circuit L4, and an electric device indirectly connected to the branch electric circuit L4 via an outlet connected to the branch electric circuit L4. The electric devices include, for example, an EV charger, a heater, a cooker, a light, a heat source device, and an air conditioner.

[0028] The main breaker 4 and the interconnection breaker 6 are commonly connected to a main electric circuit L1. The interconnection breaker 6 forms a path for supplying electric power generated by the power generation facility 71 to the main electric circuit L1 on the primary side of the main breaker 4, or forms a path for using electric power received from the system power source PS1 to charge the storage battery 72.

[0029] The grid-connection breaker 6 includes contacts in its case for electrically connecting or disconnecting the main electric circuit L1 and the connection line L5. The grid-connection breaker 6 further includes an operating lever 61 (see FIG. 2) for turning the contacts on or off. When electrical connection is established between the grid power source PS1 and the distributed power source PS2, it is possible to supply power generated by the power generation facility 71 to the main electric circuit L1 on the primary side of the main breaker 4, or to use power received from the grid power source PS1 to charge the storage battery 72. The grid-connection breaker 6 has a function for detecting a short-circuit current or an overload current flowing through the contacts, and when it detects a short-circuit current or an overload current, it opens the contacts to protect the connection line L5.

[0030] The switch 3 switches between a first state in which power is supplied from at least the system power source PS1 of the system power source PS1 and the distributed power source PS2, and a second state in which an independent operation is performed. Specifically, the switch 3 is an electromagnetic contactor (a relay with a contact with a large current capacity) with a switching contact (so-called C contact), and selects between the first state in which the main breaker 4 is connected to all the branch breakers 5, and the second state in which the main breaker 4 is disconnected from all the branch breakers 5.

[0031] 1, the switch 3 has a first contact 31 connected to the main breaker 4 via the main electric circuit L2, a second contact 32 connected to the converter 8 via a connection line L6, and a third contact 33 connected to each of the branch breakers 5 via the branch electric circuits L3. When the switch 3 selects the first state, the switch 3 brings the first contact 31 and the third contact 33 into conduction, and connects the main breaker 4 to all the branch breakers 5. On the other hand, when the switch 3 selects the second state, the switch 3 brings the second contact 32 and the third contact 33 into conduction, and disconnects the main breaker 4 from all the branch breakers 5 and connects the converter 8 to all the branch breakers 5.

[0032] When the switch 3 selects the first state, the power supplied from the system power supply PS1 is supplied from the main circuit L1 through the main breaker 4, the switch 3, and the branch breaker 5 to the load LD outside the housing 20. Furthermore, when the switch 3 selects the first state, the power supplied from the distributed power supply PS2 is supplied from the connection line L5 through the interconnection breaker 6, the main breaker 4, the switch 3, and the branch breaker 5 to the load LD outside the housing 20. On the other hand, when the switch 3 selects the second state, the power supplied from the distributed power supply PS2 is supplied from the connection line L6 through the converter 8, the switch 3, and the branch breaker 5 to the load LD outside the housing 20.

[0033] The distribution board 2 of this embodiment has a switching determination unit 91. The switching determination unit 91 determines whether to switch the switch 3 to either the first state or the second state based on whether power is supplied from the system power source PS1, and controls the switch 3. More specifically, the switching determination unit 91 determines to switch the switch 3 to the first state when power is supplied from the system power source PS1, and determines to switch the switch 3 to the second state when power is not supplied from the system power source PS1. The distribution board 2 of this embodiment includes the switching determination unit 91 in the housing 20. In other words, the switching determination unit 91 is accommodated in the housing 20 of the distribution board 2. Therefore, the switching determination unit 91 determines whether power is supplied from the system power source PS1 by monitoring the voltage applied to the first contact 31 of the switch 3 connected to the system power source PS1 via the main breaker 4.

[0034] The distributed power source PS2 supplies the power converted and output by the converter 8 to the distribution board 2. In the illustrated example, the power generation equipment 71 and the storage battery 72, which are the distributed power source PS2, are each connected to the converter 8 via an electric line L7. The converter 8 converts the power generated by the power generation equipment 71 or the power discharged by the storage battery 72 into power suitable for the distribution board 2, and converts the power input from the interconnection breaker 6 of the distribution board 2 into power suitable for charging the storage battery 72.

[0035] The converter 8 includes a converter and an inverter. The converter is provided in a path connecting the inverter to the power generation facility 71 and the storage battery 72. The converter has a function of a DC / DC converter that converts input power into power of a predetermined voltage value and outputs it. The converter outputs electrical energy (generated power or stored power) output from the power generation facility 71 or the storage battery 72 to the inverter via the DC / DC converter, and the inverter converts DC power into AC power and outputs it to the distribution board 2. On the other hand, the converter outputs electrical energy (power supplied from the system power source PS1) output from the interconnection breaker 6 of the distribution board 2 to the inverter via the DC / DC converter, and the inverter converts DC power into AC power and outputs it to the storage battery 72.

[0036] The converter 8 has a first connection part connected to the grid breaker 6 and a second connection part connected to the second contact 32 of the switch 3 .

[0037] The first connection part is connected to the grid power source PS1 via the grid breaker 6, enabling grid-connected operation. Specifically, the first connection part is connected to the grid breaker 6 via a connection line L5, and is connected to the main circuit L1, which is the primary side of the main breaker 4, via the grid breaker 6. Hereinafter, the first connection part in the converter 8 is called a "grid-connection terminal." The grid-connection terminal inputs and outputs electric power. The electric power input from the grid-connection terminal originates from the grid power source PS1, and the electric power output from the grid-connection terminal originates from the electric power generated by the power generation facility 71 or the electric power discharged from the storage battery 72. In the present disclosure, "grid-connected operation" refers to an operation in which the grid power source PS1 and the distributed power source PS2 are connected in parallel, and the distribution board 2 is supplied with electric power from at least the grid power source PS1. That is, in the "grid-connected operation," electric power may be supplied to the distribution board 2 only from the grid power source PS1, or electric power may be supplied to the distribution board 2 from both the grid power source PS1 and the distributed power source PS2.

[0038] On the other hand, the second connection part is connected to the second contact 32 of the switch 3 via the connection line L6, enabling independent operation. The second connection part does not output power to the second contact 32 of the switch 3 during a period when power can be received from the system power source PS1, and outputs power to the second contact 32 of the switch 3 during a period when power cannot be received from the system power source PS1. The converter 8 judges whether power can be received from the system power source PS1 using a voltage between terminals at a connection terminal. Hereinafter, the second connection part of the converter 8 is referred to as an "independent terminal." In the present disclosure, "independent operation" refers to an operation in which power is supplied from the distributed power source PS2 to the distribution board 2 in a state separated from the system power source PS1, and an operation in which power is supplied from the distributed power source PS2 to the distribution board 2 without being supplied from the system power source PS1.

[0039] (Branch breaker) The detailed configuration of the branch breaker 5 will be described below.

[0040] As shown in FIG. 1, each of the plurality of branch breakers 5 includes a switch 51, a detection unit 52, a communication unit 53, a control unit 54, an operation unit 55, and a calculation unit 56.

[0041] The switch 51 connects and disconnects a branch electric circuit L4 between a branch breaker 5 having the switch 51 and a load LD connected to the branch breaker 5. In other words, the switch 51 switches between electrical connection and disconnection between the changeover device 3 and the load LD connected to the branch breaker 5 having the switch 51. The switch 51 of this embodiment includes a first switch 511 and a second switch 512. The first switch 511 and the second switch 512 are connected in series in the branch electric circuit L4.

[0042] The first switch 511 is a mechanical switch, and has, for example, a tripping mechanism. Specifically, the first switch 511 includes a fixed contact and a movable contact that constitute a contact, and the contact of the first switch 511 is inserted into the branch electric circuit L4. In the first switch 511, when a short circuit current, an overload current, or the like is detected by the detection unit 52 described later, the tripping mechanism trips the movable contact and opens the contact. As an example, the first switch 511 includes an electromagnet that trips the movable contact when a current flows through it, and when a short circuit current, an overload current, or the like is detected by the detection unit 52, a current flows through the electromagnet, thereby opening the contact.

[0043] Similarly, the second switch 512 is a mechanical switch and has, for example, a tripping mechanism. In the first embodiment, the first switch 511 also serves as the second switch 512. In other words, the first switch 511 and the second switch 512 are one mechanical switch. The second switch 512 has a tripping mechanism that trips a movable contact and opens the contact based on control information I3 output from a cutoff control section 12 of the control unit 1, which will be described later.

[0044] The detection unit 52 is disposed in the branch electric circuit L4 and configured to detect a short circuit current, an overload current, etc. The first switch 511 opens the contacts when the detection unit 52 detects a short circuit current, an overload current, etc.

[0045] The communication unit 53 has a function of a communication interface for communicating, for example, by wire or wirelessly, with a second communication unit 132 (described later) of the control unit 1. The control unit 54 controls the second switch 512 based on control information I3 received by the communication unit 53 from the control unit 1, and the second switch 512 makes the branch electric circuit L4 conductive or cuts it off in accordance with the control content of the control unit 54.

[0046] For example, the communication unit 53 is a communication module capable of wireless communication conforming to a communication standard such as Wi-Fi (registered trademark). Note that the communication unit 53 may be a communication module capable of wired communication conforming to a communication standard such as a wired LAN (Local Area Network).

[0047] The operation unit 55 is configured to operate the first switch 511 and the second switch 512 to turn on and off the branch electric circuit L4. That is, the branch breaker 5 is configured to be able to switch the branch electric circuit L4 from a conducting state to a cutting state and from a cutting state to a conducting state in response to manual operation of the operation lever.

[0048] For example, after the detection unit 52 detects a short circuit current or an overload current and the first switch 511 cuts off the branch electric circuit L4, if a user (e.g., a resident) of the distribution board system 100 confirms safety, the branch electric circuit L4 can be restored to a conductive state by operating the operation lever. Also, after the second switch 512 cuts off the branch electric circuit L4 based on the control information I3 output from the cut-off control unit 12, if a user of the distribution board system 100 wishes to supply power to the load LD connected to the cut-off branch electric circuit L4, the branch electric circuit L4 can be restored to a conductive state by operating the operation lever.

[0049] The calculation unit 56 calculates the power consumption of the branch breaker 5 having the calculation unit 56. The calculation unit 56 of the first embodiment is disposed on the primary side of the branch breaker 5. Specifically, the calculation unit 56 of the first embodiment is disposed in a location on the branch electric circuit L3 that is located outside the housing of the branch breaker 5 that accommodates at least the switch 51. The "power consumption of the branch breaker 5" in the present disclosure is the total power consumed by the load LD connected to the branch breaker 5. Specifically, the calculation unit 56 is an instantaneous value of the power consumed by the load LD. The calculation unit 56 may calculate the total power consumed by the load LD within a preset period (for example, one hour, one day, one week, etc.). The calculation unit 56 may calculate the total power actually consumed by the load LD, or may calculate an estimated value of the total power that the load LD will consume in the future.

[0050] (2-3) Control unit As shown in FIG. 1, the control unit 1 includes an identification unit 11, a shutoff control unit 12, a communication unit 13, and a seismic sensor unit 14.

[0051] The control unit 1 preferably includes, for example, a computer system. In the computer system, a processor such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit) reads and executes a program stored in a memory. Thus, the functions of the identification unit 11 and the cutoff control unit 12 are realized. The computer system includes a processor that operates according to a program as a main hardware configuration. The type of the processor is not important as long as it can realize the function by executing the program. The processor is configured with one or more electronic circuits including a semiconductor integrated circuit (IC) or an LSI (Large Scale Integration). Here, it is called an IC or an LSI, but the name changes depending on the degree of integration, and it may be called a system LSI, a VLSI (Very Large Scale Integration), or an ULSI (Ultra Large Scale Integration). A field programmable gate array (FPGA) that is programmed after the manufacture of the LSI, or a reconfigurable logic device that can reconfigure the connection relationship inside the LSI or set up the circuit partition inside the LSI, can also be used for the same purpose. The multiple electronic circuits may be integrated into one chip or provided on multiple chips. The multiple chips may be integrated into one device, or may be provided in multiple devices.

[0052] As shown in FIG. 1, the communication unit 13 includes a first communication unit 131, a second communication unit 132, and a third communication unit 133. The first communication unit 131 has a function of a communication interface for communicating with a communication unit of the distributed power source PS2 (the power generation equipment 71 and the storage battery 72) in a wired or wireless manner, for example. The second communication unit 132 has a function of a communication interface for communicating with a communication unit 53 in each of the multiple branch breakers 5 in a wired or wireless manner, for example. The third communication unit 133 has a function of a communication interface for communicating with an external device A1 (see FIG. 1) in a wired or wireless manner, for example. For example, the first communication unit 131, the second communication unit 132, and the third communication unit 133 are communication modules capable of wireless communication in accordance with a communication standard such as Wi-Fi (registered trademark). Note that the first communication unit 131, the second communication unit 132, and the third communication unit 133 may be communication modules capable of wired communication in accordance with a communication standard such as a wired LAN.

[0053] The "external device A1" in the present disclosure is, for example, an information terminal owned by a user (e.g., a resident) of the distribution board system 100, or a device (terminal) installed at a consumer facility for the purpose of managing and monitoring the amount of power (amount of power used, amount of power generated, amount of power stored, etc.) at the consumer facility. The information terminal here is specifically a smartphone or a tablet computer. The information terminal may also be, for example, a laptop personal computer or a wearable device such as a smart watch.

[0054] The seismic sensor 14 is configured to sense earthquake shaking and output the sensing result to the identification unit 11. When the seismic sensor 14 senses shaking of a preset magnitude or greater, it outputs the sensing result to the identification unit 11. As an example, the seismic sensor 14 is an electrical type that senses shaking using an acceleration sensor, a displacement sensor, or the like. The seismic sensor 14 may be of a falling ball type that senses shaking when a ball falls off a base due to shaking, or may be of a pendulum type that senses shaking based on the swinging speed of the pendulum.

[0055] When the identifying unit 11 detects that the independent operation has started and the seismic sensor 14 detects an earthquake, the identifying unit 11 identifies a preset branch breaker 5 among the multiple branch breakers 5 as a branch breaker X1 that is not to be powered. That is, when the identifying unit 11 detects that the independent operation has started and receives a detection result from the seismic sensor 14, the identifying unit 11 identifies a preset branch breaker 5 among the multiple branch breakers 5 as a branch breaker X1 that is not to be powered. According to this configuration, when the supply of power from the system power source PS1 is cut off due to the occurrence of an earthquake, the user (e.g., a resident) of the distribution board system 100 can select in advance the load LD to which the distributed power source PS2 supplies power, which is advantageous in that both higher convenience and safety can be achieved. In the example shown in FIG. 2, there are ten branch breakers 5, and the identifying unit 11 identifies two branch breakers 5 out of the ten branch breakers 5 as branch breakers X1 that are not to be powered.

[0056] In this embodiment, as shown in FIG. 1, the identifying unit 11 receives setting information I1 related to the branch breaker X1 that is not a target for power supply from the external device A1, and identifies the branch breaker X1 that is not a target for power supply based on the setting information I1. The external device A1 accepts an operation by a user of the distribution board system 100 to set (select) at least one branch breaker 5 out of the multiple branch breakers 5 as the branch breaker X1 that is not a target for power supply, creates setting information I1 based on the operation, and transmits the setting information I1 to the third communication unit 133 of the control unit 1. The identifying unit 11 receives the setting information I1 received from the external device A1 at the third communication unit 133, and identifies the branch breaker 5 that is preset in the external device A1 out of the multiple branch breakers 5 as the branch breaker X1 that is not a target for power supply based on the setting information I1. This configuration has the advantage that it is easy for a user of the distribution board system 100 to set the branch breaker X1 that is not a target for power supply.

[0057] The identifying unit 11 detects that the independent operation has started by receiving independent operation information I2 indicating that the independent operation has started from the distributed power source PS2. When the independent operation starts, the distributed power source PS2 transmits the independent operation information I2 to the first communication unit 131 of the control unit 1, and the identifying unit 11 detects that the independent operation has started by receiving the independent operation information I2 from the distributed power source PS2 at the first communication unit 131. That is, when the identifying unit 11 receives the independent operation information I2 from the distributed power source PS2 at the first communication unit 131 and the seismic sensor 14 senses an earthquake (receives a sensing result from the seismic sensor 14), the identifying unit 11 identifies a branch breaker 5 that is preset among the multiple branch breakers 5 as the branch breaker X1 that is not to be supplied with power. This configuration has the advantage that the identifying unit 11 is less likely to erroneously detect that the independent operation has started.

[0058] The tripping control unit 12 trips a branch electric circuit L4 (see FIG. 1 ) between the load LD and the branch breaker X1 that is not a target for power supply identified by the identification unit 11. More specifically, the tripping control unit 12 transmits control information I3 indicating that the branch electric circuit L4 between the load LD and the branch breaker X1 that is not a target for power supply identified by the identification unit 11 is to be tripped to the branch breaker X1 that is not a target for power supply via a second communication unit 132 described later.

[0059] According to the above configuration, by setting in advance the branch breaker 5 connected to the load LD that may generate heat when power is supplied as the branch breaker X1 not to be supplied with power, the distributed power source PS2 can supply power to the loads LD other than the load LD, without supplying power to the load LD that may generate heat when power is supplied, when the power supply from the system power source PS1 is cut off due to an earthquake. Therefore, both convenience and safety can be ensured when the power supply from the system power source PS1 is cut off due to an earthquake. That is, the control unit 1 of this embodiment has the advantage of being able to achieve both convenience and safety when the power supply from the system power source is cut off due to an earthquake.

[0060] (3) Variations The above-described embodiment is merely one of various embodiments of the present disclosure. The above-described embodiment can be modified in various ways depending on the design and the like as long as the object of the present disclosure can be achieved. The following modified examples may be realized in appropriate combination. The same reference numerals are used to designate the same components as those in the above-described embodiment, and the description thereof will be omitted.

[0061] (3-1) First Modification In the above embodiment, the identifying unit 11 detects that the independent operation has started by receiving independent operation information I2 indicating that the independent operation has started from the distributed power source PS2. However, as shown in Fig. 3, the identifying unit 11a may detect that the independent operation has started by receiving independent operation information I2a indicating that the independent operation has started from the switch 3a.

[0062] As shown in FIG. 3, the distribution board system 100a includes a control unit 1a, a distribution board 2, and a switch 3a.

[0063] The switch 3a switches between a first state in which power is supplied from at least the system power source PS1 of the system power source PS1 and the distributed power source PS2, and a second state in which an independent operation is performed, similar to the switch 3. When switching from the first state to the second state, the switch 3a transmits independent operation information I2a to the fourth communication unit 134 of the control unit 1a.

[0064] The control unit 1a includes an identification unit 11a, a shutoff control unit 12a, a communication unit 13a, and a seismic sensor unit .

[0065] The communication unit 13a includes a fourth communication unit 134, a second communication unit 132, and a third communication unit 133. The communication unit 13a differs from the communication unit 13 in that it includes a fourth communication unit 134 instead of the first communication unit 131. The fourth communication unit 134 has a function of a communication interface for communicating with the switch 3a, for example, in a wired or wireless manner. The fourth communication unit 134 may be a communication module capable of wired communication conforming to a communication standard such as a wired LAN.

[0066] The identifying unit 11a detects that the independent operation has started by receiving the independent operation information I2a indicating that the independent operation has started from the switch 3a. More specifically, the identifying unit 11a detects that the independent operation has started by receiving the independent operation information I2a from the switch 3a at the fourth communication unit 134. That is, when the identifying unit 11a receives the independent operation information I2a from the switch 3a at the fourth communication unit 134 and the seismic sensor 14 senses an earthquake (receives the sensing result from the seismic sensor 14), the identifying unit 11a identifies a branch breaker 5 that is preset among the multiple branch breakers 5 as the branch breaker X1 that is not to be supplied with power. This configuration has the advantage that it is not necessary to provide a configuration for communicating with the control unit 1a in the distributed power source PS2 (the power generation equipment 71 and the storage battery 72).

[0067] The tripping control unit 12a, like the tripping control unit 12, trips the branch electric circuit L4 between the branch breaker X1 that is not a target for power supply identified by the identification unit 11a and the load LD. More specifically, the tripping control unit 12a, like the tripping control unit 12, transmits control information I3 indicating that the branch electric circuit L4 between the branch breaker X1 that is not a target for power supply identified by the identification unit 11a and the load LD is to be tripped, to the branch breaker X1 that is not a target for power supply via the second communication unit 132.

[0068] According to the above configuration, by setting in advance the branch breaker 5 connected to the load LD that may generate heat when power is supplied as the branch breaker X1 not to be supplied with power, the distributed power source PS2 can supply power to the loads LD other than the load LD, without supplying power to the load LD that may generate heat when power is supplied, when the power supply from the system power source PS1 is cut off due to an earthquake. Therefore, both convenience and safety can be ensured when the power supply from the system power source PS1 is cut off due to an earthquake. That is, the control unit 1a of the first modification has the advantage of being able to achieve both convenience and safety, similar to the control unit 1, when the power supply from the system power source is cut off due to an earthquake.

[0069] (3-2) Second Modification In the above-described embodiment, the identifying unit 11 detects that independent operation has started by receiving independent operation information I2 indicating that independent operation has started from the distributed power source PS2. However, as shown in Fig. 4, the control unit 1b may further include a monitoring unit 15 that monitors the input voltage of the power input from the distributed power source PS2 to the switch 3, and a determining unit 16 that determines the state of the distributed power source PS2 based on the monitoring result of the monitoring unit 15, and the identifying unit 11b may detect that independent operation has started by the determining unit 16 determining that independent operation has started.

[0070] As shown in Fig. 4, the distribution board system 100b includes a control unit 1b, a distribution board 2, a switch 3, and a voltage sensor 92. The voltage sensor 92 measures the input voltage of power input from the distributed power source PS2 to the switch 3. More specifically, the voltage sensor 92 shown in Fig. 4 is disposed on a connection line L6 connecting the converter 8 and the switch 3, measures the input voltage of power input from the distributed power source PS2 to the switch 3, and transmits input voltage information I4 relating to the measured input voltage to a fifth communication unit 135 (described later) of the control unit 1b.

[0071] The control unit 1b includes an identification unit 11b, a shutdown control unit 12b, a communication unit 13b, a seismic sensing unit 14, a monitoring unit 15, and a determination unit 16.

[0072] The communication unit 13b includes a fifth communication unit 135, a second communication unit 132, and a third communication unit 133. The communication unit 13b differs from the communication unit 13 in that it includes a fifth communication unit 135 instead of the first communication unit 131. The fifth communication unit 135 has a function of a communication interface for communicating with the voltage sensor 92, for example, in a wired or wireless manner. Note that the fifth communication unit 135 may be a communication module capable of wired communication conforming to a communication standard such as a wired LAN.

[0073] The monitoring unit 15 monitors the input voltage of the power input from the distributed power source PS2 to the switch 3, based on the input voltage information I4 received by the fifth communication unit 135 from the voltage sensor 92. The determination unit 16 determines the state of the distributed power source PS2 based on the monitoring result of the monitoring unit 15. More specifically, the determination unit 16 determines that independent operation has started when the input voltage monitored by the monitoring unit 15 is equal to or higher than a preset threshold, and determines that independent operation has not started when the input voltage monitored by the monitoring unit 15 is lower than the preset threshold. The determination unit 16 outputs the determination result to the identification unit 11b.

[0074] The identifying unit 11b detects that the independent operation has started when the determining unit 16 determines that the independent operation has started. More specifically, the identifying unit 11b detects that the independent operation has started when the identifying unit 11b receives a determination result from the determining unit 16 that the determining unit 16 has determined that the independent operation has started. That is, when the identifying unit 11b receives a determination result from the determining unit 16 that the determining unit 16 has determined that the independent operation has started and the seismic sensing unit 14 senses an earthquake (receives a sensing result from the seismic sensing unit 14), the identifying unit 11b identifies a branch breaker 5 that is preset among the multiple branch breakers 5 as the branch breaker X1 that is not to be supplied with power. This configuration has the advantage that it is not necessary to provide a configuration for communicating with the control unit 1b in the distributed power source PS2 (the power generation equipment 71 and the storage battery 72).

[0075] The tripping control unit 12b, like the tripping control unit 12, trips the branch electric circuit L4 between the branch breaker X1 that is not a target for power supply identified by the identification unit 11b and the load LD. More specifically, the tripping control unit 12b, like the tripping control unit 12, transmits control information I3 indicating that the branch electric circuit L4 between the branch breaker X1 that is not a target for power supply identified by the identification unit 11b and the load LD is to be tripped, to the branch breaker X1 that is not a target for power supply via the second communication unit 132.

[0076] According to the above configuration, by setting in advance the branch breaker 5 connected to the load LD that may generate heat when power is supplied as the branch breaker X1 not to be supplied with power, the distributed power source PS2 can supply power to the loads LD other than the load LD, without supplying power to the load LD that may generate heat when power is supplied, when the power supply from the system power source PS1 is cut off due to an earthquake. Therefore, both convenience and safety can be ensured when the power supply from the system power source PS1 is cut off due to an earthquake. That is, the control unit 1b of the second modified example has the advantage of being able to achieve both convenience and safety, similar to the control unit 1, when the power supply from the system power source is cut off due to an earthquake.

[0077] (3-3) Third Modification In the above-described embodiment, the identifying unit 11 receives setting information I1 related to the branch breaker X1 that is not to be supplied with power from the external device A1, and identifies the branch breaker X1 that is not to be supplied with power based on the setting information I1. However, as shown in Fig. 5, the control unit 1c further includes a setting unit 17 that presets the branch breaker X1 that is not to be supplied with power, and the identifying unit 11c identifies the branch breaker 5 that is preset by the setting unit 17 among the multiple branch breakers 5 as the branch breaker X1 that is not to be supplied with power.

[0078] 5, the distribution board system 100c includes a control unit 1c, a distribution board 2, and a switch 3. The control unit 1c includes a specification unit 11c, a shutdown control unit 12c, and a communication unit 13c.

[0079] The communication unit 13c includes a first communication unit 131 and a second communication unit 132. The communication unit 13c differs from the communication unit 13 in that it does not include a third communication unit 133.

[0080] The setting unit 17 sets in advance the branch breaker X1 that is not to be supplied with power. More specifically, the setting unit 17 accepts an operation by a user of the distribution board system 100c to set (select) at least one branch breaker 5 out of the multiple branch breakers 5 as the branch breaker X1 that is not to be supplied with power, and sets the branch breaker X1 that is not to be supplied with power in advance. The identifying unit 11 identifies, based on the contents set by the setting unit 17, the branch breaker 5 that is set in advance by the external device A1 out of the multiple branch breakers 5, as the branch breaker X1 that is not to be supplied with power.

[0081] The tripping control unit 12c, like the tripping control unit 12, trips the branch electric circuit L4 between the branch breaker X1 that is not a target for power supply identified by the identification unit 11c and the load LD. More specifically, the tripping control unit 12c, like the tripping control unit 12, transmits control information I3 indicating that the branch electric circuit L4 between the branch breaker X1 that is not a target for power supply identified by the identification unit 11c and the load LD is to be tripped, to the branch breaker X1 that is not a target for power supply via the second communication unit 132.

[0082] According to the above configuration, by setting in advance the branch breaker 5 connected to the load LD that may generate heat when power is supplied as the branch breaker X1 not to be supplied with power, the distributed power source PS2 can supply power to the loads LD other than the load LD, without supplying power to the load LD that may generate heat when power is supplied, when the power supply from the system power source PS1 is cut off due to an earthquake. Therefore, it is possible to ensure both convenience and safety when the power supply from the system power source PS1 is cut off due to an earthquake. That is, the control unit 1c of the third modification has the advantage of being able to achieve both convenience and safety, similar to the control unit 1, when the power supply from the system power source is cut off due to an earthquake.

[0083] (3-4) Other Modifications Other variations of the above-described embodiment are listed below. The following variations may be implemented in appropriate combination.

[0084] In the above-described embodiment, the control unit 1 is housed inside the housing 20 of the distribution board 2. However, as shown in Fig. 6, the control unit 1 may not be housed inside the housing 20 of the distribution board 2a, but may be housed in a housing separate from the housing 20.

[0085] In the above-described embodiment, the distribution board 2 includes the interconnection breaker 6 and the switch 3. However, as shown in FIG. 6, the distribution board 2a does not necessarily include the interconnection breaker 6 and the switch 3. That is, the interconnection breaker 6 and the switch 3 may be provided separately from the distribution board 2a. In other words, the interconnection breaker 6 and the switch 3 may not be housed inside the housing 20 of the distribution board 2a, but may be housed in a housing separate from the housing 20.

[0086] More specifically, as shown in FIG. 6, the distribution board system 100d may include a control unit 1, a distribution board 2a, and a switching unit 93. The distribution board 2a includes a main breaker 4 and a plurality of branch breakers 5, and the switching unit 93 includes a main breaker 931, an interconnection breaker 6, a switch 3, and a switching determination unit 91. A primary terminal of the main breaker 931 is connected to the main electric circuit L1. A secondary terminal of the main breaker 931 is connected to a first contact 31 of the switch 3 via the main electric circuit L2a. The main breaker 931 conducts and cuts off the main electric circuit L2a between the main breaker 931 and the switch 3. A third contact 33 of the switch 3 is connected to a primary terminal of the main breaker 4 via the main electric circuit L2b.

[0087] In the above-described embodiment, the first switch 511 and the second switch 512 are one mechanical switch. However, the first switch 511 and the second switch 512 may be one semiconductor switch, and may include, for example, a field effect transistor (FET), an insulated gate bipolar transistor (IGBT), a bipolar transistor, or a solid state relay (SSR).

[0088] In the above-described first embodiment, the first switch 511 also serves as the second switch 512, but may be a different switch from the second switch 512. That is, the first switch 511 may be a mechanical switch separate from the mechanical switch that is the second switch 512. In the above case, the first switch 511 and the second switch 512 are connected in series in the branch electric circuit L4.

[0089] That is, the first switch 511 may be a mechanical switch and the second switch 512 may be a semiconductor switch, or the first switch 511 may be a semiconductor switch and the second switch 512 may be a mechanical switch. Also, both the first switch 511 and the second switch 512 may be mechanical switches or may be semiconductor switches.

[0090] In the above embodiment, the switch 3 is an electromagnetic contactor having a contact C, but may be an electromagnetic contactor having a contact A. The structure of the switch 3 is not limited as long as it has a function of switching between a first state in which power is supplied from at least the system power source PS1 of the system power source PS1 and the distributed power source PS2, and a second state in which an independent operation is performed.

[0091] In the above-described embodiment, the switching determination unit 91 is housed in the housing 20 of the distribution board 2. However, the switching determination unit 91 may not be housed in the housing 20 of the distribution board 2 and may be separate from the distribution board 2. In this case, the switching determination unit 91 determines whether or not power is being supplied from the system power source PS1 by monitoring the current at a position in the main electric circuit L1 close to the system power source PS1 with respect to the connection point between the main breaker 4 and the interconnection breaker 6. As an example, the switching determination unit 91 may be included in a terminal installed in the customer facility for the purpose of managing and monitoring the amount of power (amount of power used, amount of power generated, amount of power stored, etc.) at the customer facility.

[0092] (summary) The control unit (1, 1a to 1c) of the first embodiment includes a seismic sensor (14), an identifying unit (11, 11a to 11c), and a shutoff control unit (12, 12a to 12c). The seismic sensor (14) detects an earthquake. The identifying unit (11, 11a to 11c) detects that an independent operation has started, and identifies a branch breaker (X1) that is not a target for power supply among a plurality of branch breakers (5) included in the distribution board (2, 2a) when the seismic sensor (14) detects an earthquake. In the independent operation, power is supplied from at least one of the system power source (PS1) and the distributed power source (PS2) to the distribution board (2, 2a) that supplies power to an electrically connected load (LD), but power is supplied from the distributed power source (PS2) instead of from the system power source (PS1). The cutoff control unit (12, 12a to 12c) cuts off the electric path (L4) between the load (LD) and the branch breaker (X1) that is not the target of power supply and that is identified by the identification unit (11, 11a to 11c).

[0093] The above configuration has the advantage of being both convenient and safe.

[0094] In the control unit (1, 1c) of the second aspect, in the first aspect, the identification unit (11, 11c) detects that autonomous operation has started by receiving autonomous operation information (I2) indicating that autonomous operation has started from the distributed power source (PS2).

[0095] The above configuration has the advantage that the identification unit (11, 11c) is less likely to erroneously detect that the independent operation has started.

[0096] In the control unit (1a) of the third aspect, in the first aspect, the identification unit (11a) detects that the independent operation has started by receiving independent operation information (I2a) indicating that the independent operation has started from the switch (3a). The switch (3a) switches between a first state in which power is supplied to the distribution boards (2, 2a) from at least the system power source (PS1) of the system power source (PS1) and the distributed power source (PS2), and a second state in which the independent operation is performed.

[0097] The above configuration has the advantage that it is not necessary to provide the distributed power sources (PS2) with a configuration for communicating with the control unit (1a).

[0098] The control unit (1b) of the fourth aspect is the same as that of the first aspect, but further includes a monitoring unit (15) and a determination unit (16). The monitoring unit (15) monitors the input voltage input from the distributed power source (PS2) to the switch (3). The switch (3) switches between a first state in which power is supplied to the distribution board (2, 2a) from at least the system power source (PS1) of the system power source (PS1) and the distributed power source (PS2), and a second state in which independent operation is performed. The determination unit (16) determines whether or not independent operation has been started based on the monitoring result of the monitoring unit (15). The identification unit (11b) detects that independent operation has been started when the determination unit (16) determines that independent operation has been started.

[0099] The above configuration has the advantage that it is not necessary to provide the distributed power sources (PS2) with a configuration for communicating with the control unit (1b).

[0100] In the control unit (1, 1a to 1c) of the fifth aspect, in any one of the first to fourth aspects, the identification unit (11, 11a to 11c) detects that autonomous operation has started and, when the seismic sensing unit (14) detects an earthquake, identifies a preset branch breaker (5) among the multiple branch breakers (5) as a branch breaker (X1) that is not to be supplied with power.

[0101] The above configuration has the advantage of being able to achieve both higher convenience and safety.

[0102] The control unit (1c) of the sixth aspect is the same as the control unit (1c) of the fifth aspect, and further includes a setting unit (17). The setting unit (17) sets in advance the branch breaker (X1) that is not the subject of power supply.

[0103] The above configuration has the advantage that it is not necessary to provide the control unit (1c) with a configuration for communicating with the external device (A1).

[0104] In the control unit (1, 1a to 1b) of the seventh aspect, in the fifth aspect, the identification unit (11, 11a to 11b) receives setting information regarding a branch breaker (X1) that is not to be supplied with power from an external device (A1), and identifies the branch breaker (X1) that is not to be supplied with power based on the setting information.

[0105] The above configuration has the advantage that the user can easily set the branch breaker (X1) that is not the target of power supply.

[0106] A distribution board system (100, 100a to 100d) of an eighth aspect includes a control unit (1, 1a to 1c) of any one of the first to ninth aspects, a distribution board (2, 2a), and a switch (3, 3a). The switch (3, 3a) switches between a first state in which power is supplied from at least the system power source (PS1) of the system power source (PS1) and the distributed power source (PS2), and a second state in which an independent operation is performed. The distribution board (2, 2a) includes a main breaker (4) to which power is supplied from the system power source (PS1). The main breaker (4) is provided between the system power source (PS1) and the switch (3, 3a).

[0107] The above configuration has the advantage of providing a distribution board system that is both convenient and safe. [Explanation of symbols]

[0108] 100, 100a~100d Distribution board system 1, 1a~1c control unit 11, 11a~11c specific part 12, 12a to 12c Cut-off control section 14 Seismic part 15 Monitoring Department 16 Judgment section 17 Setting section 2, 2a distribution board 20. Cabinet 20a opening 3, 3a switch 31 First Contact 32 Second Contact 33 Third Contact 4 Main breaker 41 Operating lever 5 Branch Breaker 51 Switch 52 Detection unit 53 Communications Department 54 Control section 55 Operation section 56 Calculation section 6 Interconnect Breaker 61 Operating lever 8. Converter 71 Power generation facilities 72 Storage battery 91 Switching decision unit 92 Voltage Sensor 93 Switching Unit 511 First Switch 512 Second Switch 931 Main breaker A1 External device I1 Setting information I2 Independent Driving Information I2a Independent driving information I3 Control information I4 Input voltage information L1 Main electrical circuit L2 main electrical circuit L2a main electrical circuit L2b main electrical circuit L3 branch circuit L4 electrical circuit (branch electrical circuit) L5 connection wire L6 connection line L7 electrical circuit LD load PS1 grid power supply PS2 distributed power supply X1 Branch Breaker

Claims

1. A seismic sensor that detects earthquakes, an identification unit that detects that an independent operation has started in which power is no longer supplied from a system power source and is supplied from the distributed power source to a distribution board that receives power from at least one of a system power source and a distributed power source and supplies the power to an electrically connected load, and that identifies a branch breaker that is not to be supplied with power among a plurality of branch breakers included in the distribution board when the seismic sensing unit detects the earthquake; A cutoff control unit that cuts off an electric path between the branch breaker that is not a target for power supply identified by the identification unit and the load, Control unit.

2. The identification unit detects that the independent operation has started by receiving independent operation information indicating that the independent operation has started from the distributed power source. The control unit according to claim 1 .

3. The identification unit detects that the independent operation has started by receiving independent operation information indicating that the independent operation has started from a switch that switches between a first state in which the power is supplied to the distribution board from at least the system power source of the system power source and the distributed power source, and a second state in which the independent operation is performed. The control unit according to claim 1 .

4. a monitoring unit that monitors an input voltage input from the distributed power source to a switch that switches between a first state in which the power is supplied to the distribution board from at least the system power source of the system power source and the distributed power source, and a second state in which the independent operation is performed; A determination unit that determines whether the independent operation has started based on a monitoring result of the monitoring unit, The identification unit detects that the independent operation has started by the determination unit determining that the independent operation has started. The control unit according to claim 1 .

5. The identification unit detects that the independent operation has started and, when the seismic sensing unit detects the earthquake, identifies a preset branch breaker among the plurality of branch breakers as the branch breaker to be not supplied with power. The control unit according to claim 1 .

6. The power supply control unit further includes a setting unit that presets the branch breaker that is not a target for power supply. A control unit according to claim 5.

7. The identification unit is receiving setting information on the branch breaker that is not to be supplied with power from an external device; Identifying the branch breaker that is not to be supplied with power based on the setting information. A control unit according to claim 5.

8. A control unit according to any one of claims 1 to 7; The distribution board; a switch that switches between a first state in which power is supplied from at least the grid power source among the grid power source and the distributed power source, and a second state in which the independent operation is performed; The distribution board includes a main breaker to which the power is supplied from the system power supply, The main breaker is provided between the system power source and the switch. Distribution board system.

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