Control unit and distribution board system

Abstract

To provide a control unit and a distribution board system that are capable of improving convenience.SOLUTION: A control unit 1 includes an identification unit 11 and a shutoff control unit 12. In an autonomous operation, the identification unit 11 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 breaker control system that is composed of a breaker and a breaker control means. The breaker controls the power supply state to at least one electrical device used in a predetermined indoor area. The breaker control means controls the conductive state and cut-off state of the breaker. The breaker control means is composed of a power outage occurrence detection means and a power outage recovery detection means. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-124809 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, there are cases where the distribution board is 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, it is necessary to determine at the time of installation which of the multiple branch breakers the distributed power source will supply power to. In other words, there is a problem of low convenience.

[0005] An object of the present disclosure is to provide a control unit and a distribution board system that can improve convenience. [Means for solving the problem]

[0006] A control unit according to an aspect of the present disclosure includes an identification unit and a shutoff control unit. In an independent operation, the identification unit 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, 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 is supplied with the power from the distributed power source without being supplied with the power from the grid 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 improve convenience. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a block diagram showing the configuration of a control unit according to the first 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 first embodiment. [Figure 4] FIG. 4 is a block diagram showing a configuration of a control unit according to a second modified example of the first embodiment. [Diagram 5] FIG. 5 is a block diagram showing a configuration of a control unit according to a third modified example of the first embodiment. [Figure 6]FIG. 6 is a block diagram showing the configuration of a control unit according to another modified example of the first embodiment. [Figure 7] FIG. 7 is a block diagram showing the configuration of a control unit according to the second embodiment. [Figure 8] FIG. 8 is a block diagram showing the configuration of a control unit according to a first modified example of the second embodiment. [Figure 9] FIG. 9 is a block diagram showing a configuration of a control unit according to a second modified example of the second embodiment. [Figure 10] FIG. 10 is a block diagram showing a configuration of a control unit according to a third modified example of the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (1) Embodiment 1 (1-1) Overview An overview of the control unit 1 according to the first embodiment will be described below with reference to FIG.

[0011] The control unit 1 of the first 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] 1, the control unit 1 includes an identifying unit 11 and a shutoff control unit 12. In an independent operation in which power is not supplied from the system power source PS1 to the distribution board 2 but is supplied from a distributed power source PS2, the identifying unit 11 identifies a branch breaker X1 that is not to be supplied with power among the multiple branch breakers 5. The shutoff control unit 12 shuts off an electric path L4 between the branch breaker X1 that is not to be supplied with power identified by the identifying unit 11 and a load LD.

[0013] In a typical distribution board, the branch breaker to which a distributed power source supplies power in an isolated operation must be selected from among multiple branch breakers during installation, and it is difficult to change the branch breaker to which the distributed power source supplies power after installation. In other words, it is difficult to change the branch breaker so that the distributed power source can supply power to the appropriate branch breaker depending on the situation, and there is a problem of low flexibility after installation.

[0014] On the other hand, in the first embodiment, by changing the branch breaker X1 that is not to be supplied with power, which is identified by the identifying unit 11 after construction, the branch breaker 5 to which the distributed power source PS2 supplies power can be changed according to the situation. That is, the control unit 1 of the first embodiment has an advantage of being able to improve convenience. In the present disclosure, "convenience" refers to a degree of ease of use, and "improving convenience" means making it more convenient.

[0015] (1-2) Detailed configuration (1-2-1) Distribution Board System Hereinafter, a detailed configuration of the distribution board system 100 of the first embodiment will be described with reference to FIGS.

[0016] 1, the distribution board system 100 includes a control unit 1, a distribution board 2, and a switch 3. In the first 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.

[0017] (1-2-2) 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.

[0018] 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.

[0019] In the first embodiment, the distributed power supply PS2 includes a power generation facility 71 and a storage battery 72. That is, the first embodiment will be described using an example in which three types of power supplies are provided, namely, a system power supply 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 a device that generates electric power using natural energy such as solar power, wind power, hydroelectric power, and geothermal power. In the present disclosure, the power generation facility 71 is assumed to be a device that generates electric power using solar power. The storage battery 72 is a device that charges and discharges electric power. The power generation facility 71 and the storage battery 72 are connected to a converter 8.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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 connects and disconnects 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 disconnects the main circuit L2 when the leakage current detection function detects a leakage current.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] The grid-connection breaker 6 includes contacts in a 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] The distribution board 2 of the first 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 the first 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.

[0033] 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.

[0034] 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.

[0035] 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 .

[0036] 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.

[0037] 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.

[0038] (Branch breaker) The detailed configuration of the branch breaker 5 will be described below.

[0039] 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.

[0040] 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 the first 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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 off in accordance with the control content of the control unit 54. As an example, when the control unit 54 makes the branch electric circuit L4 conductive, it causes a current to flow through an electromagnet of the first switch 511 that also serves as the second switch 512, thereby tripping the movable contact of the first switch 511 and opening the contact.

[0045] 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).

[0046] 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.

[0047] 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.

[0048] 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 the branch electric circuit L3 at a location 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 also 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.

[0049] (1-2-3) Control unit As shown in FIG. 1, the control unit 1 includes an identifying unit 11, a cutoff control unit 12, and a communication unit 13.

[0050] 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.

[0051] In the independent operation, the identifying unit 11 identifies a branch breaker X1 that is not to be supplied with power among the plurality of branch breakers 5. In the example illustrated 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 supplied with power.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] The identifying unit 11 of the first embodiment identifies a preset branch breaker 5 among the multiple branch breakers 5 as the branch breaker X1 that is not to be powered when the independent operation is started. More specifically, when the identifying unit 11 detects that the independent operation is started, the identifying unit 11 identifies a preset branch breaker 5 among the multiple branch breakers 5 as the branch breaker X1 that is not to be powered. That is, the timing at which the identifying unit 11 identifies the preset branch breaker 5 as the branch breaker X1 that is not to be powered is the timing at which the identifying unit 11 detects that the independent operation is started. According to this configuration, the interruption control unit 12 can interrupt the branch electric circuit L4 between the preset branch breaker X1 that is not to be powered and the load LD at the timing at which the independent operation is started. As a result, by setting the branch breaker 5 connected to the unnecessary and non-urgent load LD as the branch breaker X1 that is not to be powered, it is possible to efficiently reduce the power supplied by the distributed power source PS2 from the timing at which the independent operation is started. In addition, in a typical distribution board, in order to efficiently reduce the power supplied by the distributed power source PS2, it is necessary to connect the unnecessary and non-urgent load LD to a branch breaker selected at the time of construction as a branch breaker to which the distributed power source does not supply power. However, in the first embodiment, the branch breaker 5 connected to the unnecessary and non-urgent load LD can be set as the branch breaker X1 to be not supplied with power after construction, so the unnecessary and non-urgent load LD may be connected to any branch breaker 5. That is, the control unit 1 of the first embodiment has an advantage of being able to further improve convenience.

[0057] The identifying unit 11 receives power supply information I2 relating to the state of the distributed power supply PS2 from the distributed power supply PS2, and identifies the branch breaker X1 that is not a target for power supply based on the power supply information I2. More specifically, the identifying unit 11 detects that independent operation has started by receiving the power supply information I2 from the distributed power supply PS2 at the first communication unit 131, and identifies the branch breaker X1 that is not a target for power supply. When independent operation starts, the distributed power supply PS2 transmits the power supply information I2 to the first communication unit 131 of the control unit 1. This configuration has the advantage that the identifying unit 11 is less likely to erroneously detect that independent operation has started.

[0058] In embodiment 1, since the distributed power source PS2 includes a power generation equipment 71 and a storage battery 72, the power source information I2 includes independent operation information indicating that the power generation equipment 71 and the storage battery 72 have started independent operation, generated power information regarding the amount of power generated by the power generation equipment 71, and remaining power information regarding the remaining power in the storage battery 72.

[0059] (1-3) Modification of the first embodiment The above-described first embodiment is merely one of various embodiments of the present disclosure. The above-described first 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 configuration as the above-described first embodiment, and the description thereof will be omitted.

[0060] (1-3-1) First Modification of the First Embodiment In the above-described first embodiment, the identifying unit 11 receives power supply information I2 relating to the state of the distributed power supply PS2 from the distributed power supply PS2, and identifies the branch breaker X1 that is not a target for power supply based on the power supply information I2. However, as shown in Fig. 3, the identifying unit 11a may receive power supply information I2a from the switch 3a, and identify the branch breaker X1 that is not a target for power supply based on the power supply information I2a.

[0061] As shown in FIG. 3, the distribution board system 100a includes a control unit 1a, a distribution board 2, and a switch 3a.

[0062] The switch 3a, like 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. When switching from the first state to the second state, the switch 3a transmits power source information I2a to the fourth communication unit 134 of the control unit 1a. In the first modified example of the first embodiment, the power source information I2a includes independent operation information indicating that the power generation facility 71 and the storage battery 72 have started independent operation.

[0063] The control unit 1a includes a specification unit 11a, a shutdown control unit 12a, and a communication unit 13a.

[0064] The communication unit 13a includes a second communication unit 132, a third communication unit 133, and a fourth communication unit 134. 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.

[0065] The identifying unit 11a receives power supply information I2a from the switch 3a, and identifies the branch breaker X1 that is not to be supplied with power based on the power supply information I2a. More specifically, the identifying unit 11a detects that independent operation has started based on the power supply information I2a received from the switch 3a at the fourth communication unit 134, and identifies a preset branch breaker 5 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).

[0066] 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 identifying unit 11a and the load LD. More specifically, like the tripping control unit 12, the tripping control unit 12a 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 identifying 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. According to this configuration, in the first modification of the first embodiment, the branch breaker 5 connected to the non-essential load LD can be set as the branch breaker X1 that is not a target for power supply after construction, so that the non-essential load LD may be connected to any branch breaker 5. That is, the control unit 1a of the first modification of the first embodiment has an advantage of being able to improve convenience, like the control unit 1.

[0067] (1-3-2) Second Modification of the First Embodiment In the control unit 1 of the above-mentioned first embodiment, the identifying unit 11 receives power supply information I2 relating to the state of the distributed power supply PS2 from the distributed power supply PS2, and identifies the branch breaker X1 that is not to be supplied with power based on the power supply information I2. However, as shown in Fig. 4, the control unit 1b may further include a monitoring unit 14 that monitors the input voltage of the power input from the distributed power supply PS2 to the switch 3, and a determining unit 15 that determines the state of the distributed power supply PS2 based on the monitoring result of the monitoring unit 14, and the identifying unit 11b may identify the branch breaker X1 that is not to be supplied with power based on the determination result of the determining unit 15.

[0068] 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.

[0069] The control unit 1b includes an identifying unit 11b, a shutdown control unit 12b, a communication unit 13b, a monitoring unit 14, and a determining unit 15.

[0070] The communication unit 13b includes a second communication unit 132, a third communication unit 133, and a fifth communication unit 135. 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. The fifth communication unit 135 may be a communication module capable of wired communication conforming to a communication standard such as a wired LAN.

[0071] The monitoring unit 14 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 15 determines the state of the distributed power source PS2 based on the monitoring result of the monitoring unit 14. More specifically, the determination unit 15 determines that independent operation has started when the input voltage monitored by the monitoring unit 14 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 14 is lower than the preset threshold. The determination unit 15 outputs the determination result to the identification unit 11b.

[0072] The identifying unit 11b identifies the branch breaker X1 that is not to be supplied with power, based on the determination result of the determining unit 15. More specifically, when the identifying unit 11b receives a determination result that the determining unit 15 has determined that the independent operation has started, the identifying unit 11b detects that the independent operation has started, and identifies a preset branch breaker 5 from 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).

[0073] 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, like the tripping control unit 12, the tripping control unit 12b 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 is to be tripped to the branch breaker X1 that is not a target for power supply via the second communication unit 132. According to this configuration, in the second modification of the first embodiment, the branch breaker 5 connected to the non-essential load LD can be set as the branch breaker X1 that is not a target for power supply after construction, so that the non-essential load LD may be connected to any branch breaker 5. That is, the control unit 1b of the second modification of the first embodiment has an advantage of being able to improve convenience, like the control unit 1.

[0074] (1-3-3) Third Modification of the First Embodiment In the above-described first 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 16 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 16 among the multiple branch breakers 5 as the branch breaker X1 that is not to be supplied with power.

[0075] 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.

[0076] 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.

[0077] The setting unit 16 sets in advance the branch breaker X1 that is not to be supplied with power. More specifically, the setting unit 16 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 11c identifies, based on the contents set by the setting unit 16, 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.

[0078] 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, like the tripping control unit 12, the tripping control unit 12c 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. According to this configuration, in the third modification of the first embodiment, the branch breaker 5 connected to the non-essential load LD can be set as the branch breaker X1 that is not a target for power supply after construction, so that the non-essential load LD may be connected to any branch breaker 5. That is, the control unit 1c of the third modification of the first embodiment has an advantage that it can improve convenience, like the control unit 1. Furthermore, in the first modification of the first embodiment, there is an advantage that it is not necessary to provide the control unit 1c with a configuration for communicating with the external device A1 (see FIG. 1).

[0079] (1-3-4) Other Modifications of the First Embodiment Below, other variations of the above-mentioned embodiment 1 are listed. The following variations may be realized in appropriate combination.

[0080] In the above-described first 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.

[0081] In the above-described first 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 accommodated inside the housing 20 of the distribution board 2a, but may be accommodated in a housing separate from the housing 20.

[0082] 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.

[0083] In the above-described first 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).

[0084] 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.

[0085] 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.

[0086] In the above-described first embodiment, the switch 3 is an electromagnetic contactor having a contact C, but may be an electromagnetic contactor having a contact A. The switch 3 is not limited in structure 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.

[0087] In the above-described first 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 a current at a position in the main electric circuit L1 close to the system power source PS1 with respect to a 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.

[0088] (2) Embodiment 2 (2-1) Overview A distribution board system 100e according to the second embodiment will be described below with reference to Fig. 7. Configurations similar to those in the first embodiment will be given the same reference numerals and descriptions thereof will be omitted.

[0089] In the distribution board system 100 of the first embodiment, the identifying unit 11 of the control unit 1 identifies a preset branch breaker 5 among the multiple branch breakers 5 as the branch breaker X1 not to be supplied with power when independent operation is started. On the other hand, in the distribution board system 100e of the second embodiment, the identifying unit 11e of the control unit 1e identifies a preset branch breaker 5 among the multiple branch breakers 5 as the branch breaker X1 not to be supplied with power during independent operation.

[0090] The distribution board system 100e of the second embodiment differs from the distribution board system 100 of the first embodiment in that, during independent operation, a branch breaker X1 that is not to be supplied with power is identified according to the amount of power that can be supplied by the distributed power source PS2.

[0091] (2-2) Detailed configuration (2-2-1) Distribution Board System Hereinafter, a detailed configuration of the distribution board system 100e of the second embodiment will be described with reference to FIG.

[0092] 7, the distribution board system 100e includes a control unit 1e, a distribution board 2, and a switch 3. In the first embodiment, the control unit 1e and the switch 3 are housed in a housing 20 of the distribution board 2. In the second embodiment, similarly to the first embodiment, the distributed power source PS2 includes a power generation facility 71 and a storage battery 72.

[0093] (2-2-2) Control unit As shown in FIG. 7, the control unit 1e includes an identifying unit 11e, a cutoff control unit 12e, a communication unit 13e, and a setting unit 16a.

[0094] The communication unit 13e includes a first communication unit 131 and a second communication unit 132. The communication unit 13e differs from the communication unit 13 in that it does not include a third communication unit 133.

[0095] The determination unit 11e acquires the total amount of supply power supplied from the distributed power source PS2 to each of the multiple branch breakers 5 during the independent operation. More specifically, during the independent operation, the determination unit 11e receives supply power information I5 from each of the multiple branch breakers 5 via the second communication unit 132, and acquires the total amount of supply power supplied from the distributed power source PS2 to each of the multiple branch breakers 5 based on the supply power information I5. During the independent operation, the determination unit 11e acquires the total amount of supply power based on the supply power information I5 at predetermined time intervals. The supply power information I5 here is information related to the power consumption of the branch breakers 5 calculated by the calculation unit 56 for each of the multiple branch breakers 5. As described above, the "power consumption of the branch breakers 5" in the present disclosure is the total power consumed by the loads LD to which the branch breakers 5 are connected. That is, the "power consumption of the branch breaker 5" during the independent operation is the total power that is supplied from the distributed power source PS2 to the load LD via each of the multiple branch breakers 5 and consumed by the load LD.

[0096] The identifying unit 11e identifies the branch breaker X1 that is not a target for power supply during the independent operation so that the total amount of power supply acquired based on the power supply information I5 during the independent operation is equal to or less than the amount related to the power that the distributed power supply PS2 can supply. More specifically, the identifying unit 11e identifies the branch breaker X1 that is not a target for power supply during the independent operation so that the total amount of power supply acquired based on the power supply information I5 during the independent operation is equal to or less than the amount related to the power that the distributed power supply PS2 can supply. The identifying unit 11e identifies the branch breaker X1 that is not a target for power supply at predetermined time intervals during the independent operation. This configuration provides an effect that the branch electric circuit L4 between the branch breaker X1 that is not a target for power supply and the load LD can be cut off according to the power that the distributed power supply PS2 can supply. In other words, the control unit 1e provides an effect that the branch breaker 5 that supplies power can be changed appropriately to the situation according to the power that the distributed power supply PS2 can supply. That is, the control unit 1e of the second embodiment has an advantage that it can improve convenience. For example, during autonomous operation, if the total amount of power supplied increases due to an increase in the number of loads LD consuming power, the branch breaker 5 supplying power can be changed appropriately to suit the situation, depending on the power that can be supplied by the distributed power source PS2.

[0097] Since the distributed power source PS2 includes the power generation facility 71 and the storage battery 72, the amount of power that can be supplied is an amount based on the amount of power source power, which is at least one of the amount of power generated by the distributed power source PS2 and the remaining amount of power. In other words, the amount of power that can be supplied is an amount based on the amount of power source power, which is at least one of the amount of power generated by the power generation facility 71 and the remaining amount of power of the storage battery 72. In the second embodiment, it is assumed that the amount of power source power is both the amount of power generated by the distributed power source PS2 and the remaining amount of power. Specifically, it is assumed that the amount of power source power is the sum of the amount of power generated by the distributed power source PS2 and the remaining amount of power. In other words, the amount of power that can be supplied is, for example, the amount of power source power, which is the sum of the amount of power generated by the distributed power source PS2 and the remaining amount of power, divided by the desired time for which independent operation is to continue.

[0098] The identification unit 11e receives power source information I2b from the distributed power source PS2 via the first communication unit 131, detects that the power generation facility 71 and the storage battery 72 are in independent operation based on the power source information I2b, and acquires the amount of power source power. The power source information I2b includes independent operation information indicating that the power generation facility 71 and the storage battery 72 have started independent operation, generated power information regarding the amount of power generated by the power generation facility 71, and remaining power information regarding the remaining power in the storage battery 72.

[0099] The setting unit 16a sets in advance the branch breaker X1 that is not a target for power supply in association with the amount of power from the power source. More specifically, the setting unit 16a sets in advance the branch breaker 5 to which the load LD having at least one of the least necessity and urgency is connected as the branch breaker X1 that is not a target for power supply in order of decreasing amount of power from the power source in association with the amount of power from the power source.

[0100] The specifying unit 11e specifies the branch breaker X1 that is not a target for power supply according to the amount of power from the power source based on the setting contents of the setting unit 16a. That is, the specifying unit 11e specifies the branch breaker X1 that is not a target for power supply according to the amount of power from the power source so that the total amount of supply power acquired based on the supply power information I5 is equal to or less than the amount related to the power that can be supplied. Specifically, the specifying unit 11e specifies the branch breaker 5 as the branch breaker X1 that is not a target for power supply in descending order of the amount of power from the power source associated with the branch breaker 5 so that the total amount of supply power acquired based on the supply power information I5 is equal to or less than the amount related to the power that can be supplied. As a result, the shutoff control unit 12e shuts off the branch electric circuit L4 between the branch breaker X1 that is not a target for power supply identified by the specifying unit 11e and the load LD, thereby achieving the effect of being able to shut off the branch electric circuit L4 according to the power that can be supplied. As a result, there is an advantage that it is easier to continue the independent operation until a desired time.

[0101] (2-3) Modification of the second embodiment The above-described second embodiment is merely one of various embodiments of the present disclosure. The above-described second 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 configuration as the above-described second embodiment, and the description thereof will be omitted.

[0102] (2-3-1) First Modification of the Second Embodiment In the above-described second embodiment, the distributed power source PS2 includes the power generation facility 71 and the storage battery 72. However, as shown in FIG. 8, the distributed power source PS2 may include the power generation facility 71 and not include the storage battery 72.

[0103] 8, the distribution board system 100f includes a control unit 1f, a distribution board 2, and a switch 3. In a first modification of the second embodiment, the distributed power source PS2 includes a power generation facility 71 but does not include a storage battery 72.

[0104] As shown in FIG. 8, the control unit 1f includes a specification unit 11f, a cutoff control unit 12f, a communication unit 13e, and a setting unit 16b.

[0105] The identifying unit 11f identifies a branch breaker X1 that is not a target for power supply so that the total amount of power supply is equal to or less than the amount of power that can be supplied by the distributed power source PS2 during the independent operation. In the first modified example of the second embodiment, since the distributed power source PS2 includes the power generation facility 71, the amount of power that can be supplied is an amount based on the amount of power generated by the distributed power source PS2. In other words, the amount of power that can be supplied is, for example, an amount obtained by dividing the amount of power generated by the distributed power source PS2 by the desired time for which the independent operation is to continue.

[0106] The identifying unit 11f receives power source information I2c from the distributed power source PS2 (power generation equipment 71) at the first communication unit 131, detects that the power generation equipment 71 is in independent operation based on the power source information I2c, and acquires the amount of power source electric energy. The power source information I2c includes independent operation information indicating that the power generation equipment 71 has started independent operation, and generated electric energy information regarding the amount of power generated by the power generation equipment 71.

[0107] The setting unit 16b sets in advance the branch breaker X1 to which power is not to be supplied in association with the amount of power generated by the power generation facility 71. More specifically, the setting unit 16b sets in advance the branch breaker 5 to which a load LD having at least one of low necessity and low urgency is connected as the branch breaker X1 to which power is not to be supplied in order of decreasing amount of power generated by the power generation facility 71 in association with the amount of power generated by the power generation facility 71.

[0108] The identifying unit 11f identifies the branch breaker X1 that is not to be supplied with power according to the power generation amount of the power generation facility 71, based on the setting contents of the setting unit 16b. That is, the identifying unit 11f identifies the branch breaker X1 that is not to be supplied with power according to the power generation amount of the power generation facility 71, so that the total amount of supply power acquired based on the supply power information I5 is equal to or less than the amount related to the supplyable power. Specifically, the identifying unit 11f identifies the branch breaker 5 as the branch breaker X1 that is not to be supplied with power in descending order of the power generation amount of the power generation facility 71 associated with the branch breaker 5, so that the total amount of supply power acquired based on the supply power information I5 is equal to or less than the amount related to the supplyable power.

[0109] According to the above configuration, it is possible to achieve an effect that the branch electric circuit L4 between the branch breaker X1 that is not a target for power supply and the load LD can be cut off according to the power generation amount of the power generation facility 71. In other words, it is possible that the control unit 1f can change the branch breaker 5 that supplies power according to the situation according to the power generation amount of the power generation facility 71. That is, the control unit 1f of the first modification of the second embodiment has an advantage that it can improve convenience. In addition, the cutoff control unit 12f cuts off the branch electric circuit L4 between the branch breaker X1 that is not a target for power supply identified by the identification unit 11f and the load LD, and therefore it is possible to cut off the branch electric circuit L4 according to the power that can be supplied. As a result, it is possible to achieve an advantage that it is easy to continue the independent operation until a desired time.

[0110] (2-3-2) Second Modification of the Second Embodiment In the above-described second embodiment, the distributed power source PS2 includes the power generation facility 71 and the storage battery 72. However, as shown in FIG. 9, the distributed power source PS2 may include the storage battery 72 and not include the power generation facility 71.

[0111] 9, the distribution board system 100g includes a control unit 1g, a distribution board 2, and a switch 3. In a second modification of the second embodiment, the distributed power source PS2 includes a storage battery 72, but does not include a power generation facility 71.

[0112] As shown in FIG. 9, the control unit 1g includes a specification unit 11g, a cutoff control unit 12g, a communication unit 13e, and a setting unit 16c.

[0113] The identifying unit 11g identifies a branch breaker X1 that is not a target for power supply so that the total amount of power supply is equal to or less than the amount of power that can be supplied by the distributed power source PS2 during the independent operation. In the second modified example of the second embodiment, since the distributed power source PS2 includes the storage battery 72, the amount of power that can be supplied is an amount based on the remaining power of the distributed power source PS2. In other words, the amount of power that can be supplied is, for example, the amount obtained by dividing the remaining power of the distributed power source PS2 by the desired time for which the independent operation is to continue.

[0114] The identifying unit 11g receives power source information I2d from the distributed power source PS2 (storage battery 72) via the first communication unit 131, detects that the storage battery 72 is in independent operation based on the power source information I2d, and acquires the amount of power source power. The power source information I2d includes independent operation information indicating that the storage battery 72 has started independent operation, and remaining power information regarding the remaining power of the storage battery 72.

[0115] The setting unit 16c sets in advance the branch breaker X1 that is not a target for power supply in association with the remaining power amount of the storage battery 72. More specifically, the setting unit 16c sets in advance the branch breaker 5 to which a load LD having at least one of low necessity and low urgency is connected as the branch breaker X1 that is not a target for power supply in order of decreasing remaining power amount of the storage battery 72 in association with the remaining power amount of the storage battery 72.

[0116] The identifying unit 11g identifies the branch breaker X1 that is not a target for power supply according to the remaining power of the storage battery 72, based on the setting contents of the setting unit 16c. That is, the identifying unit 11g identifies the branch breaker X1 that is not a target for power supply according to the remaining power of the storage battery 72, so that the total amount of supply power acquired based on the supply power information I5 is equal to or less than the amount related to the supplyable power. Specifically, the identifying unit 11g identifies the branch breaker 5 as the branch breaker X1 that is not a target for power supply in descending order of the remaining power of the storage battery 72 associated with the branch breaker 5, so that the total amount of supply power acquired based on the supply power information I5 is equal to or less than the amount related to the supplyable power.

[0117] According to the above configuration, it is possible to cut off the branch electric circuit L4 between the branch breaker X1 that is not a target for power supply and the load LD according to the remaining power of the storage battery 72. In other words, it is possible to change the branch breaker 5 that supplies power to the distributed power source PS2 according to the remaining power of the storage battery 72 in a manner appropriate to the situation. That is, the control unit 1g of the second modification of the second embodiment has an advantage of being able to improve convenience. In addition, the cutoff control unit 12g cuts off the branch electric circuit L4 between the branch breaker X1 that is not a target for power supply and the load LD that is specified by the specifying unit 11g, and therefore it is possible to cut off the branch electric circuit L4 according to the power that can be supplied. As a result, it is possible to easily continue the autonomous operation until the desired time.

[0118] (2-3-3) Third Modification of the Second Embodiment In the above-mentioned embodiment 2, the amount of power that can be supplied is an amount based on the amount of power source power, which is at least one of the amount of power generated by the power generation equipment 71 and the remaining power in the storage battery 72, but it may also be an amount based on the amount of converted power, which is the amount of power that can be output by the converter 8.

[0119] 10, the distribution board system 100h includes a control unit 1h, a distribution board 2, and a switch 3. In the second modification of the second embodiment, the distributed power source PS2 includes a power generation facility 71 and a storage battery 72, similar to the second embodiment.

[0120] As shown in FIG. 10, the control unit 1h includes a specification unit 11h, a cutoff control unit 12h, a communication unit 13e, and a setting unit 16d.

[0121] The identifying unit 11h identifies the branch breaker X1 that is not the target of power supply so that the total amount of power supply is equal to or less than the amount related to the power that can be supplied by the distributed power source PS2 during the independent operation. In a second modified example of the second embodiment, the amount related to the power that can be supplied is an amount based on the converted power amount, which is the amount of power that can be output by the converter 8. In other words, the amount related to the power that can be supplied is, for example, an amount obtained by dividing the converted power amount, which is the amount of power that can be output by the converter 8, by the desired time for which the independent operation is to continue.

[0122] The identifying unit 11h receives power source information I2e from the converter 8 via the first communication unit 131, detects that the converter 8 is in independent operation based on the power source information I2e, and acquires the amount of power source power. The power source information I2e includes independent operation information indicating that the power generation equipment 71 and the storage battery 72 have started independent operation, and conversion power information regarding the amount of conversion power of the converter 8.

[0123] The setting unit 16d sets in advance the branch breaker X1 that is not a target for power supply in association with the amount of converted power of the converter 8. More specifically, the setting unit 16d sets in advance the branch breaker 5 to which a load LD having at least one of low necessity and low urgency is connected as the branch breaker X1 that is not a target for power supply in order of decreasing amount of converted power of the converter 8 in association with the amount of converted power of the converter 8.

[0124] The identifying unit 11h identifies the branch breaker X1 that is not a target for power supply according to the amount of converted power of the converter 8 based on the setting contents of the setting unit 16d. That is, the identifying unit 11h identifies the branch breaker X1 that is not a target for power supply according to the amount of converted power of the converter 8 so that the total amount of supply power acquired based on the supply power information I5 is equal to or less than the amount related to the power that can be supplied. Specifically, the identifying unit 11h identifies the branch breaker 5 as the branch breaker X1 that is not a target for power supply in descending order of the amount of converted power of the converter 8 associated with the branch breaker 5 so that the total amount of supply power acquired based on the supply power information I5 is equal to or less than the amount related to the power that can be supplied.

[0125] According to the above configuration, the branch electric circuit L4 between the branch breaker X1 that is not a power supply target and the load LD can be cut off according to the amount of converted power of the converter 8. In other words, the distributed power source PS2 can change the branch breaker 5 that supplies power according to the amount of converted power of the converter 8 in a manner appropriate to the situation. That is, the control unit 1h of the third modification of the second embodiment has an advantage of being able to improve convenience. In addition, the cutoff control unit 12h cuts off the branch electric circuit L4 between the branch breaker X1 that is not a power supply target identified by the identification unit 11h and the load LD, and therefore has an advantage of being able to cut off the branch electric circuit L4 according to the power that can be supplied. Therefore, there is an advantage that it is easy to continue the independent operation until the desired time. Furthermore, according to this configuration, there is an advantage that it is not necessary to provide the distributed power source PS2 with a configuration for communicating with the control unit 1h.

[0126] (2-3-4) Other Modifications of the Second Embodiment Other variations of the above-described embodiment are listed below. The following variations may be implemented in appropriate combination.

[0127] In the above-described second embodiment, the identifying unit 11e acquires the total amount of power supply from the distributed power source PS2 to each of the plurality of branch breakers 5 during the independent operation. However, the identifying unit 11e may acquire the power supply from at least the system power source PS1 to each of the plurality of branch breakers 5 during the grid-connected operation. That is, the identifying unit 11e may acquire the power supply from only the system power source PS1 or from both the system power source PS1 and the distributed power source PS2 to each of the plurality of branch breakers 5 during the grid-connected operation. In this case, the identifying unit 11e identifies, among the plurality of branch breakers 5, a branch breaker 5 to which a power supply exceeding a preset threshold is supplied as a branch breaker X1 to which power is not to be supplied during the grid-connected operation. The threshold here is set to be equal to or less than the amount of power that the distributed power source PS2 can supply. It is preferable that the threshold be set to be smaller than the amount of power that the distributed power source PS2 can supply. According to this configuration, when the independent operation is started, the cutoff control unit 12e can cut off in advance the branch electric circuit L4 between the branch breaker X1 of the non-power supply target whose supply power exceeds the threshold and the load LD. For example, when the current value of the power that the distributed power source PS2 can supply is 10A, assuming that a current of 3A is supplied to one load LD during grid-connected operation, if power is further supplied to another load LD consuming a current of 8A after the independent operation is started, the current value of the power that the distributed power source PS2 can supply exceeds the current value. In order to avoid such a situation, when the independent operation is started, the branch electric circuit L4 between the other load LD consuming a current of 8A and the branch breaker 5 connected to the other load LD is cut off in advance. In the above case, the threshold is preferably 7A, for example.

[0128] The identifying unit 11e may acquire the total amount of power supply from at least the system power source PS1 to each of the plurality of branch breakers 5 during the grid-connected operation. In this case, the identifying unit 11e identifies the branch breaker X1 that is not a target for power supply so that the total amount of power supply acquired during the grid-connected operation is equal to or less than the amount related to the power that the distributed power source PS2 can supply. With this configuration, when the independent operation is started, the shutoff control unit 12e can shut off the branch electric circuit L4 between the branch breaker X1 that is not a target for power supply and the load LD in advance.

[0129] In the above-described second embodiment, the identifying unit 11e receives supply power information I5 from each of the multiple branch breakers 5. However, the identifying unit 11e may receive supply power information I5 from a power measuring unit that is provided in a portion before the branching of the branch electric circuit L3 (see FIG. 7) and measures the power before being branched and supplied to each of the multiple branch breakers 5. The supply power information I5 referred to here is information regarding the power before being branched and supplied to each of the multiple branch breakers 5.

[0130] The specifying unit 11e may also receive supply power information I5 from the converter 8 or the distributed power source PS2. The supply power information I5 here is information about the power output from the converter 8 or the distributed power source PS2 to the distribution board 2.

[0131] The control units 1e to 1h of the second embodiment described above may not have the setting units 16a to 16d. More specifically, as shown in FIG. 7, in the control unit 1e in the case where the distributed power source PS2 includes a power generation facility 71 and a storage battery 72, the identifying unit 11e may identify a branch breaker 5 that consumes relatively large amounts of power among the multiple branch breakers 5 as a branch breaker X1 that is not to be fed power, according to the amount of power from the power source. Specifically, the identifying unit 11e receives information on the power consumption of each of the multiple branch breakers 5 from the corresponding branch breaker 5 at the second communication unit 132, and acquires the power consumption of each of the multiple branch breakers 5. The "power consumption" referred to here is the total power consumed by the load LD connected to each of the multiple branch breakers 5, calculated by the calculation unit 56. For example, during autonomous operation, if the total amount of power supplied increases due to an increase in the number of loads LD consuming power, the branch circuit L4 between the load LD and a branch breaker 5 that consumes relatively more power among the multiple branch breakers 5 can be shut off in accordance with the power that can be supplied by the distributed power source PS2.

[0132] 8, in a control unit 1f in which the distributed power source PS2 includes a power generation facility 71 but does not include a storage battery 72, the identifying unit 11f may identify a branch breaker that has relatively high power consumption among the multiple branch breakers 5 as a branch breaker X1 that is not to be supplied with power, in accordance with the amount of power generated by the power generation facility 71. On the other hand, in a control unit 1g in which the distributed power source PS2 includes a storage battery 72 but does not include a power generation facility 71 as shown in FIG. 9, the identifying unit 11g may identify a branch breaker that has relatively high power consumption among the multiple branch breakers 5 as a branch breaker X1 that is not to be supplied with power, in accordance with the remaining power amount of the storage battery 72. Similarly, in a control unit 1h in which the amount related to the power that can be supplied is an amount based on the amount of power converted by the converter 8 as shown in FIG. 10, the identifying unit 11h may identify a branch breaker that has relatively high power consumption among the multiple branch breakers 5 as a branch breaker X1 that is not to be supplied with power, in accordance with the amount of power converted by the converter 8.

[0133] According to the above configuration, each of the cutoff control units 12e to 12f can cut off the branch electric circuit L4 between the branch breaker X1, which is not a target for power supply and consumes a large amount of power, and the load LD, thereby having the advantage that it is easier to continue independent operation until the desired time.

[0134] (summary) The control unit (1, 1a to 1h) of the first aspect includes an identifying unit (11, 11a to 11h) and a shutoff control unit (12, 12a to 12h). The identifying unit (11, 11a to 11h) identifies a branch breaker (X1) that is not a target for power supply among a plurality of branch breakers (5) included in a distribution board (2, 2a) in an independent operation. In the independent operation, power is not supplied from the system power source (PS1) to the distribution board (2, 2a) 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), but is supplied with power from the distributed power source (PS2). The shutoff control unit (12, 12a to 12h) shuts off an electric circuit (L4) between the branch breaker (X1) that is not a target for power supply identified by the identifying unit (11, 11a to 11h) and the load (LD).

[0135] The above configuration has the advantage of improving convenience.

[0136] In the control unit (1, 1a to 1d) of the second aspect, in the first aspect, the identification unit (11, 11a to 11d) 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 when independent operation is started.

[0137] The above configuration has the advantage of being able to further improve convenience.

[0138] The control unit (1c) of the third embodiment further includes a setting unit (16) that presets the branch breaker (X1) that is not the subject of power supply in the second embodiment.

[0139] 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).

[0140] In the control unit (1, 1a, 1b, 1d) of the fourth aspect, in the second aspect, the identification unit (11, 11a, 11b, 11d) receives setting information (I1) 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 (I1).

[0141] The above configuration has the advantage that the user can easily set the branch breaker (X1) that is not the target of power supply.

[0142] In the control unit (1e to 1h) of the fifth aspect, in the first aspect, the identification unit (11e to 11h) acquires the total amount of supply power supplied from the distributed power source (PS2) to each of the multiple branch breakers (5) during autonomous operation, and identifies the branch breaker (X1) that is not to be supplied with power so that the total amount of supply power is equal to or less than the amount related to the power that the distributed power source (PS2) can supply.

[0143] The above configuration has the advantage that the distributed power source (PS2) can change the branch breaker (5) that supplies power in a manner appropriate to the situation, depending on the power that the distributed power source (PS2) can supply.

[0144] In the control unit (1g) of the sixth aspect, in the fifth aspect, the distributed power source (PS2) includes a storage battery (72). The amount of power that can be supplied is based on the remaining power of the distributed power source (PS2). A setting unit (16c) is further provided that presets a branch breaker (X1) that is not a target for power supply in association with the remaining power. The identifying unit (11g) identifies a branch breaker (X1) that is not a target for power supply according to the remaining power based on the setting contents of the setting unit (16c).

[0145] The above configuration has the advantage that it becomes easier to continue autonomous operation until a desired time.

[0146] In the control unit (1g) of the seventh aspect, in the fifth aspect, the distributed power source (PS2) includes a storage battery (72). The amount of power that can be supplied is based on the remaining power of the distributed power source (PS2). The identifying unit (11g) identifies, according to the remaining power, a branch breaker (5) that consumes relatively more power among the multiple branch breakers (5) as a branch breaker (X1) that is not to be supplied with power.

[0147] The above configuration has the advantage that it becomes easier to continue autonomous operation until the desired time.

[0148] In the control unit (1f) of the eighth aspect, in the fifth aspect, the distributed power source (PS2) includes a power generation facility (71). The amount of power that can be supplied is based on the amount of power generated by the distributed power source (PS2). The control unit (1f) further includes a setting unit (16b) that presets a branch breaker (X1) that is not to be supplied with power in association with the amount of power generated. The identifying unit (11f) identifies the branch breaker (X1) that is not to be supplied with power according to the amount of power generated, based on the contents of the setting by the setting unit (16b).

[0149] The above configuration has the advantage that it becomes easier to continue autonomous operation until a desired time.

[0150] In the control unit (1f) of the ninth aspect, in the fifth aspect, the distributed power source (PS2) includes a power generation facility (71). The amount of power that can be supplied is based on the amount of power generated by the distributed power source (PS2). The identifying unit (11f) identifies, according to the amount of power generated, a branch breaker (5) that consumes relatively more power among the multiple branch breakers (5) as a branch breaker (X1) that is not to be supplied with power.

[0151] The above configuration has the advantage that it becomes easier to continue autonomous operation until the desired time.

[0152] In the control unit (1e) of the tenth aspect, in the fifth aspect, the distributed power source (PS2) includes a power generation facility (71) and a storage battery (72). The amount of power that can be supplied is based on the amount of power source electric energy, which is at least one of the amount of power generated and the remaining power of the distributed power source (PS2). The control unit (11e) further includes a setting unit (16a) that presets a branch breaker (X1) that is not to be supplied with power in association with the amount of power source electric energy. The identifying unit (11e) identifies the branch breaker (X1) that is not to be supplied with power according to the amount of power source electric energy based on the contents of the setting by the setting unit (16a).

[0153] The above configuration has the advantage that it becomes easier to continue autonomous operation until a desired time.

[0154] In the control unit (1e) of the eleventh aspect, in the fifth aspect, the distributed power source (PS2) includes a power generation facility (71) and a storage battery (72). The amount of power that can be supplied is based on the amount of power source electric energy, which is at least one of the amount of power generated and the remaining power of the distributed power source (PS2). The identifying unit (11e) identifies, according to the amount of power source electric energy, a branch breaker (5) that consumes relatively more power among the multiple branch breakers (5) as a branch breaker (X1) that is not to be supplied with power.

[0155] The above configuration has the advantage that it becomes easier to continue autonomous operation until the desired time.

[0156] In the control unit (1h) of the twelfth aspect, in the fifth aspect, the distributed power source (PS2) supplies the power converted and output by the converter (8) to the distribution board (2, 2a). The amount of power that can be supplied is an amount based on the converted power amount, which is the amount of power that the converter (8) can output. The control unit (1h) further includes a setting unit (16d) that pre-sets a branch breaker (X1) that is not a target for power supply in association with the converted power amount. The identifying unit (11h) identifies the branch breaker (X1) that is not a target for power supply according to the converted power amount based on the setting contents of the setting unit (16d).

[0157] The above configuration has the advantage that it is easier to continue the independent operation until the desired time. Furthermore, the above configuration has the advantage that it is not necessary to provide the distributed power source (PS2) with a configuration for communicating with the control unit (1h).

[0158] In the control unit (1h) of the thirteenth aspect, in the fifth aspect, the distributed power source (PS2) supplies the power converted and output by the converter (8) to the distribution board (2, 2a). The amount of power that can be supplied is an amount based on the converted power amount, which is the amount of power that the converter (8) can output. The identifying unit (11h) identifies a branch breaker (X1) that is not to be supplied with power relatively from among the multiple branch breakers (5) according to the converted power amount.

[0159] The above configuration has the advantage that it becomes easier to continue autonomous operation until the desired time.

[0160] In the control unit (1e to 1h) of the fourteenth aspect, in the first aspect, the identifying unit (11e to 11h) acquires supply power supplied to each of the plurality of branch breakers (5) from at least the system power source (PS1) during grid-connected operation in which power is supplied from at least the system power source (PS1). The identifying unit (11e to 11h) identifies, among each of the plurality of branch breakers (5) during grid-connected operation, a branch breaker (5) to which supply power exceeding a preset threshold is supplied as a branch breaker (X1) that is not to be supplied with power.

[0161] According to the above configuration, there is an advantage that, when independent operation is started, the cutoff control unit (12e to 12h) can cut off the electric circuit (L4) between the branch breaker (X1) that is not the target of power supply and the load (LD) in advance.

[0162] The control unit (1, 1c to 1h) of the 15th aspect is any one of the 1st to 14th aspects, in which the identification unit (11, 11c to 11h) receives power supply information (I2, I2c to I2e) regarding the state of the distributed power supply (PS2) from the distributed power supply (PS2), and identifies a branch breaker (X1) that is not to be supplied with power based on the power supply information (I2, I2c to I2e).

[0163] The above configuration has an advantage that the identification unit (11, 11c to 11h) is less likely to erroneously detect that the independent operation has started.

[0164] In the control unit (1a) of the 16th aspect, in any one of the 1st to 14th aspects, the identifying unit (11a) receives power source information (I2a) on the state of the distributed power source (PS2) from the switch (3a) and identifies the branch breaker (X1) that is not the target of power supply based on the power source information (I2a). The switch (3a) 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 an independent operation is performed.

[0165] 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).

[0166] The control unit (1b) of the seventeenth aspect is in any one of the first to fourteenth aspects, and further includes a monitoring unit (14) and a determination unit (15). The monitoring unit (14) monitors the input voltage of power 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 an independent operation is performed. The determination unit (15) determines the state of the distributed power source (PS2) based on the monitoring result of the monitoring unit (14). The identification unit (11b) identifies a branch breaker (X1) that is not a target for power supply based on the determination result of the determination unit (15).

[0167] 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).

[0168] A distribution board system (100, 100a to 100h) of an 18th aspect includes a control unit (1, 1a to 1h) of any one of the first to 17th 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).

[0169] The above configuration has the advantage of providing a distribution board system that allows high flexibility after installation. [Explanation of symbols]

[0170] 100, 100a~100h distribution board system 1, 1a~1h control unit 11, 11a~11h Specific part 12, 12a~12h Shutdown control section 14 Monitoring Department 15 Judgment section 16, 16a to 16d Setting section 2, 2a distribution board 3, 3a switch 4 Main breaker 5 Branch Breaker 6 Interconnect Breaker 71 Power generation facilities 72 Storage battery 8. Converter A1 External device I1 Setting information I2, I2a~I2e Power supply information L4 electrical circuit (branch electrical circuit) LD load PS1 grid power supply PS2 distributed power supply X1 Non-energized branch breaker

Claims

1. In an autonomous operation in which a distribution board is supplied with power from at least one of a grid power source and a distributed power source and supplies the power to an electrically connected load, the power is not supplied from the grid power source to the distribution board but is supplied with the power from the distributed power source, an identification unit that identifies a branch breaker that is not to be supplied with power among a plurality of branch breakers included in the distribution board; 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 identifies a preset branch breaker among the plurality of branch breakers as the branch breaker to be not supplied with power when the independent operation is started. The control unit according to claim 1 .

3. 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 as claimed in claim 2.

4. 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 as claimed in claim 2.

5. The identification unit is obtaining a total amount of power supplied from the distributed power sources to each of the plurality of branch breakers during the independent operation; identifying the branch breakers that are not to be supplied with power so that the total amount of the supplied power is equal to or less than the amount related to the power that can be supplied by the distributed power source; The control unit according to claim 1 .

6. The distributed power source includes a storage battery; the amount of power that can be supplied is an amount based on a remaining amount of power of the distributed power source, A setting unit that presets the branch breaker that is not a target for power supply in association with the remaining power amount, The identification unit identifies the branch breaker that is not to be supplied with power in accordance with the remaining power amount based on the setting content of the setting unit. A control unit according to claim 5.

7. The distributed power source includes a storage battery; the amount of power that can be supplied is an amount based on a remaining amount of power of the distributed power source, the identifying unit identifies, according to the remaining power, a branch breaker consuming relatively large power among the plurality of branch breakers as a branch breaker not to be supplied with power; A control unit according to claim 5.

8. The distributed power source includes a power generation facility, the amount of power that can be supplied is an amount based on the amount of power generated by the distributed power source, A setting unit that presets the branch breaker that is not a target for power supply in association with the amount of power generation, The identification unit identifies the branch breaker that is not to be supplied with power in accordance with the amount of power generated based on the setting content of the setting unit. A control unit according to claim 5.

9. The distributed power source includes a power generation facility, the amount of power that can be supplied is an amount based on the amount of power generated by the distributed power source, The identification unit identifies a branch breaker having a relatively large power consumption among the plurality of branch breakers as a branch breaker not to be supplied with power according to the amount of power generated. A control unit according to claim 5.

10. The distributed power source includes a power generation facility and a storage battery, the amount of power that can be supplied is an amount based on a power source amount, which is at least one of a power generation amount and a remaining power amount of the distributed power source, A setting unit that presets the branch breaker that is not a target for power supply in association with the amount of power from the power source, The identification unit identifies the branch breaker that is not to be supplied with power in accordance with the amount of power from the power source based on the setting content of the setting unit. A control unit according to claim 5.

11. The distributed power source includes a power generation facility and a storage battery, the amount of power that can be supplied is an amount based on a power source amount, which is at least one of a power generation amount and a remaining power amount of the distributed power source, The identification unit identifies a branch breaker having a relatively large power consumption among the plurality of branch breakers as a branch breaker not to be supplied with power according to the amount of power from the power source. A control unit according to claim 5.

12. The distributed power source supplies the power converted and output by the converter to the distribution board; the amount related to the supplyable power is an amount based on a converted power amount, which is an amount of power that the converter can output, A setting unit that presets the branch breaker that is not a target for power supply in association with the converted power amount, The identification unit identifies the branch breaker that is not to be supplied with power in accordance with the amount of converted power based on the setting content of the setting unit. A control unit according to claim 5.

13. The distributed power source supplies the power converted and output by the converter to the distribution board; the amount related to the supplyable power is an amount based on a converted power amount, which is an amount of power that the converter can output, The identification unit identifies a branch breaker having a relatively large power consumption among the plurality of branch breakers as a branch breaker not to be supplied with power according to the amount of converted power. A control unit according to claim 5.

14. The identification unit is During grid-connected operation in which the power is supplied from at least the grid power source, a supply power is obtained that is supplied from at least the grid power source to each of the plurality of branch breakers; During the grid-connected operation, among the plurality of branch breakers, a branch breaker to which the supply power exceeding a preset threshold is supplied is identified as the branch breaker that is not to be supplied with power. The control unit according to claim 1 .

15. The identification unit is receiving power information from the distributed generation regarding a status of the distributed generation; Identifying the branch breaker that is not to be supplied with power based on the power supply information. The control unit according to claim 1 .

16. The identification unit is receiving power supply information relating to a state of the distributed power supply 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 supply of the system power supply and the distributed power supply, and a second state in which the independent operation is performed; Identifying the branch breaker that is not to be supplied with power based on the power supply information. The control unit according to claim 1 .

17. a monitoring unit that monitors an input voltage of power input from the distributed power sources 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 sources, and a second state in which the independent operation is performed; a determination unit that determines a state of the distributed power source based on a monitoring result of the monitoring unit, The identification unit identifies the branch breaker that is not to be supplied with power based on a determination result of the determination unit. The control unit according to claim 1 .

18. A control unit according to any one of claims 1 to 16, 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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