Control device, power supply system, control method and program

Abstract

Provided is a control apparatus comprising a control device at another location in a power supply system, a communication unit configured to communicate prior to the supply of electrical power, and a control unit configured to control circuit breakers disposed in a converter and in a power supply network on the basis of a power supply path determined so as to lock the power supply path for a fixed time and not to intersect with any other power supply path while supplying power.

Description

[Technical Field]

[0001] The present invention relates to a control device, a power supply system, a control method, and a program. [Background technology]

[0002] Conventionally, there are base stations where various power sources (photovoltaics (PV), wind power generation, etc.) and loads (electric vehicles (EVs), storage batteries, etc.) are connected bidirectionally, and power is exchanged between these base stations after a handshake is performed between converters so that power can be exchanged one-to-one in both directions (without a slot-type circuit breaker as a connection point) (Non-Patent Document 1). [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] Naoki Hanaoka et al., "Example of an Indoor System: Study of Short-Circuit Protection Methods in an Outdoor DC Power Supply System," IEEJ2021, General Presentation 6-056 Summary of the Invention [Problem to be solved by the invention]

[0004] In future power supply systems, connection points (slot-type circuit breakers) will not only be two-way but also three-way, four-way, etc., so in order to enable n-to-n power interchange in addition to one-to-one, it will be necessary to interlock the handshake and route.However, the conventional one-to-one handshake has the problem that it is not possible to ensure the safety of the power supply route.

[0005] The disclosed technology aims to improve the safety of power supply paths in a power supply system that can accommodate complex networks. [Means for solving the problem]

[0006] The disclosed technology is a control device including: a communication unit configured to communicate with control devices of other bases in a power supply system before power interchange; and a control unit configured to lock a power supply path for a certain period of time and control a converter and a circuit breaker disposed in a power supply network based on a power supply path determined so as not to intersect with another power supply path during power supply. the power supply path is determined on the condition that a sum of transmitted power and a sum of received power are equal to each other. is. [Effects of the Invention]

[0007] The safety of the power supply path in a power supply system that can accommodate complex networks can be improved. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating an example of a configuration of a power supply system according to an embodiment of the present invention. [Figure 2] FIG. 1 is a diagram showing a circuit of a circuit breaker that branches in two directions. [Figure 3] FIG. 1 is a diagram showing a circuit of a circuit breaker that branches in three directions. [Figure 4] FIG. 1 is a diagram showing a circuit of a breaker that branches in four directions. [Figure 5] 1 is a diagram showing an example of the appearance of a housing of a circuit breaker according to Example 1 of an embodiment of the present invention. [Figure 6] 1 is a first diagram showing an example of internal wiring of a housing of a circuit breaker according to Example 1 of an embodiment of the present invention. FIG. [Figure 7] FIG. 1 is a diagram showing an example of a conventional breaking unit. [Figure 8] FIG. 1 is a diagram showing an example of an internal circuit of a conventional breaking unit. [Figure 9] FIG. 2 is a diagram showing an example of a blocking unit according to Example 1 of an embodiment of the present invention. [Figure 10] FIG. 1 is a diagram showing a circuit of a circuit breaker that branches in five directions. [Figure 11] FIG. 1 is a diagram showing a circuit of a circuit breaker that branches in six directions. [Figure 12]FIG. 2 is a second diagram showing an example of internal wiring of the casing of the circuit breaker according to the first embodiment of the present invention. [Figure 13] FIG. 10 is a diagram showing the appearance of a housing of a circuit breaker according to a modified example of Example 1 of an embodiment of the present invention. [Figure 14] FIG. 1 is a diagram illustrating an example of a conventional bidirectional power supply system. [Figure 15] FIG. 10 is a sequence diagram showing an example of a flow of handshake in a conventional bidirectional power supply system. [Figure 16] FIG. 10 is a diagram illustrating a configuration of a power supply system according to Example 2 of an embodiment of the present invention. [Figure 17] 10 is a flowchart showing an example of the flow of a control process according to Example 2 of the embodiment of the present invention. [Figure 18] 10 is a flowchart showing an example of the flow of a power supply path determination process according to Example 2 of the embodiment of the present invention. [Figure 19] FIG. 10 is a first diagram for explaining a method for determining a power supply path according to Example 2 of an embodiment of the present invention. [Figure 20] FIG. 10 is a second diagram for explaining the method for determining a power supply path according to Example 2 of the embodiment of the present invention. [Figure 21] FIG. 10 is a diagram for explaining a method for setting locking of a power supply path and protection coordination according to Example 2 of an embodiment of the present invention. [Figure 22] FIG. 2 illustrates an example of the hardware configuration of a computer. [Figure 23] FIG. 1 is a diagram illustrating a conventional interrupter circuit. [Figure 24] FIG. 1 is a diagram for explaining a conventional branch cutoff circuit. [Figure 25] FIG. 10 is a diagram illustrating an example of a branch cutoff circuit according to Example 3 of an embodiment of the present invention. [Figure 26] FIG. 10 is a diagram showing an example of a housing of a circuit breaker according to Example 3 of an embodiment of the present invention. [Figure 27] FIG. 10 is a diagram illustrating an example of a circuit of a breaker according to Example 3 of an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention (the present embodiment) will be described with reference to the drawings. The embodiment described below is merely an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0010] (Outline of this embodiment) The power supply system according to this embodiment is intended for use outdoors, for example, where various power sources (photovoltaics (PV), wind power generation, etc.) and loads (electric vehicles (EVs), storage batteries, etc.) are bidirectionally connected. Therefore, the connection points may be not only two-way but also three-way, four-way, etc., and protective circuit breakers must be individually customized according to the number of branches.

[0011] The circuit breaker according to this embodiment may be a DC circuit breaker or an AC circuit breaker. The circuit breaker according to this embodiment may be of any of a mechanical type, a hybrid type, and a semiconductor type.

[0012] 1 is a diagram illustrating an example of the configuration of a power supply system according to the present embodiment. In the power supply system 1, a plurality of power sources, loads, etc. are connected to one another via a power supply network. The power sources, loads, etc. include, for example, a first electric vehicle 101, a second electric vehicle 102, a first solar power generation facility 103, a wind power generation facility 104, a second solar power generation facility 105, a first building 106, a second building 107, a train 108, a first data center 109, a second data center 110, and a charging facility 111.

[0013] Circuit breakers are installed at branch points of the power supply network. For example, two-way circuit breaker 901 is a circuit breaker that branches in two directions. Similarly, three-way circuit breaker 902 that branches in three directions, four-way circuit breaker 903 that branches in four directions, five-way circuit breaker 904 that branches in five directions, and six-way circuit breaker 905 that branches in six directions are installed at each branch point of the power supply network.

[0014] When connecting consumers and other parties via outdoor power distribution networks (such as bus, loop, or mesh power networks), placing a circuit breaker at the branch point makes it possible to actively isolate the point of an accident in a short time.

[0015] 2 is a diagram showing a circuit of a circuit breaker that branches in two directions. The two-way circuit breaker 901 includes one interrupting unit 10. The interrupting unit 10 is connected between A and B. The interrupting unit 10 can interrupt current in two directions, from A to B and from B to A.

[0016] 3 is a diagram showing a circuit breaker circuit that branches in three directions. Three-way circuit breaker 902 includes three interrupting units 10. Each interrupting unit 10 is connected between A and B, between B and C, and between AC. Each interrupting unit 10 can interrupt current in two directions between the two connected points. This allows three-way circuit breaker 902 to interrupt current in all directions related to all combinations of points A, B, and C.

[0017] FIG. 4 is a diagram showing a circuit breaker circuit that branches in four directions. Four-way circuit breaker 903 includes six interrupting units 10. Each interrupting unit 10 is connected between A and B, between A and C, between A and D, between B and C, and between C and D. Each interrupting unit 10 can interrupt current in two directions between the two connected points. This allows four-way circuit breaker 903 to interrupt current in all directions for all combinations of four points A, B, C, and D.

[0018] Hereinafter, examples 1 to 3 will be described as specific examples of this embodiment.

[0019] Example 1 In this embodiment, the circuit breaker can be expanded by combining a circuit breaker unit capable of two-way circuit breaking with an external housing having multiple slots. Specifically, an example will be described in which branching in multiple directions, such as three or four directions, is possible by changing the position of the slot into which the circuit breaker unit is inserted.

[0020] Fig. 5 is a diagram showing an example of the appearance of a housing of a circuit breaker according to Example 1 of an embodiment of the present invention. The housing 20 is designed to allow a plurality of (for example, six in the example of Fig. 5) circuit breaking units 10 to be inserted. The circuit breaking units 10 inserted into each slot are connected between different points. For example, the circuit breaking unit 10 inserted into the first slot is connected between the A connector and the B connector, and the circuit breaking unit 10 inserted into the second slot is connected between the A connector and the C connector.

[0021] Fig. 6 is a first diagram showing an example of internal wiring of the casing of the circuit breaker according to Example 1 of the embodiment of the present invention. The casing 20 shown in Fig. 5 has six slots 30 into which six circuit breaking units 10 can be inserted. The circuit breaking units 10 inserted into each slot 30 are pre-wired so as to be connected between different points.

[0022] For example, the circuit including the first slot 30 functions as a two-way circuit 801. The circuit breaker including the breaking unit 10 and the housing 20 inserted into the first slot 30 functions as a two-way circuit breaker 901.

[0023] Furthermore, for example, a circuit including the first to third slots 30 functions as a three-way circuit 802. A circuit breaker including the breaking units 10 and the housing 20 inserted into the first to third slots 30 functions as a three-way circuit breaker 902.

[0024] Furthermore, for example, a circuit including the first to sixth slots 30 functions as a four-way circuit 803. A circuit breaker including the breaking units 10 and the housings 20 inserted into the six slots 30 from the first to sixth functions as a four-way circuit breaker 903.

[0025] 7 is a diagram showing an example of a conventional breaking unit. A conventional breaking unit 40 that is often used includes four connectors 11 and one internal circuit 12.

[0026] Fig. 8 is a diagram showing an example of an internal circuit of a conventional interrupter unit. The internal circuit 12 includes, for example, a switch 121, a capacitor 122, and a diode 123. The capacitor 122 functions to suppress voltage fluctuations when the circuit is interrupted for a short period of time. The diode 123 functions to suppress overvoltage when the circuit is interrupted for a long period of time. Such an internal circuit 12 can interrupt current in only one direction.

[0027] FIG. 9 is a diagram showing an example of a breaking unit according to Example 1 of an embodiment of the present invention. The breaking unit 10 according to this example includes four connectors 11 and two internal circuits 12. The internal circuits 12 may be the circuit shown in FIG. 8. The internal circuits 12 are connected in series in reverse directions. This allows the breaking unit 10 to break current in two directions (bidirectional).

[0028] A circuit breaker that branches in multiple directions can be configured by combining the above-mentioned circuit breaker unit 10 and housing 20. Although a circuit breaker with four or fewer directions has been described, a circuit breaker that can be expanded to five or more directions can also be configured in the same way.

[0029] FIG. 10 is a diagram showing a circuit breaker circuit that branches in five directions. The five-way circuit breaker 904 includes ten interrupting units 10. Each interrupting unit 10 is connected between A and B, between AC, between AD, between A and E, between B and C, between B and D, between B and C, between B and D, between C and D, between C and C, between C and D, and between C and D. Each interrupting unit 10 can interrupt current in two directions between the two connected points. This allows the five-way circuit breaker 904 to interrupt current in all directions for all combinations of the five points A, B, C, D, and E.

[0030] FIG. 11 is a diagram showing a circuit breaker circuit that branches in six directions. The six-way circuit breaker 905 includes 15 breaking units 10. Each breaking unit 10 is connected between A and B, between AC, between AD, between AE, between AF, between BC, between BD, between BE, between BF, between CD, between CE, between CF, between DE, between DF, and between EF. Each breaking unit 10 can break current in two directions between the two connected points. This allows the six-way circuit breaker 905 to break current in all directions for all combinations of the six points A, B, C, D, E, and F.

[0031] 12 is a second diagram showing an example of internal wiring in the housing of the circuit breaker according to Example 1 of the embodiment of the present invention. The housing 20 has 15 slots 30 into which 15 circuit breaking units 10 can be inserted. The circuit breaking units 10 inserted into each slot 30 are pre-wired so as to be connected between different points.

[0032] For example, the circuit including the first slot 30 functions as a two-way circuit 801. The circuit breaker including the breaking unit 10 and the housing 20 inserted into the first slot 30 functions as a two-way circuit breaker 901.

[0033] Furthermore, for example, a circuit including the first to third slots 30 functions as a three-way circuit 802. A circuit breaker including the breaking units 10 and the housing 20 inserted into the first to third slots 30 functions as a three-way circuit breaker 902.

[0034] Furthermore, for example, a circuit including the first to sixth slots 30 functions as a four-way circuit 803. A circuit breaker including the breaking units 10 and the housings 20 inserted into the six slots 30 from the first to sixth functions as a four-way circuit breaker 903.

[0035] Also, for example, a circuit including the first to tenth slots 30 functions as a five-way circuit 804. A circuit breaker including the breaking units 10 and housings 20 inserted into the first to tenth slots 30 functions as a five-way circuit breaker 904.

[0036] Furthermore, for example, a circuit including the first to fifteenth slots 30 functions as a six-way circuit 805. A circuit breaker including the breaking units 10 and the housings 20 inserted into the fifteen slots 30 from the first to the fifteenth slots 30 functions as a six-way circuit breaker 905.

[0037] FIG. 13 is a diagram showing the appearance of a housing of a circuit breaker according to a modification of Example 1 of an embodiment of the present invention. Housing 21 shown in FIG. 13 includes six slots 30 for realizing a four-way circuit breaker 903, and further includes a seventh slot for inserting a capacitor box and an eighth slot for inserting a fan. The capacitor box may be, for example, a capacitor for suppressing arcing during circuit breaking, a transient voltage protection circuit, an overcurrent protection circuit, or the like. The fan may also be a cooler for cooling heat generated by conduction loss at the contacts of the DC circuit breaker.

[0038] The housing 21 also has four connectors, AD, facing outward, each of which is connected to various power sources, loads, etc. in the power supply network.

[0039] According to the housing 20 (or housing 21) and circuit breaking unit 10 of this embodiment, the circuit breaking unit 10 capable of bidirectional circuit breaking can be combined with an external housing 20 having a plurality of slots, thereby simplifying the configuration of a circuit breaker that branches in multiple directions. For example, since a circuit breaker that branches in multiple directions can be configured using one type of circuit breaking unit 10, the circuit breaking units 10 can be mass-produced.

[0040] In this embodiment, an example in which the circuit is incorporated in the housing 20 (or housing 21) has been shown, but a part or all of the circuit may be incorporated in the breaking unit 10.

[0041] Furthermore, although an example of the interrupting unit 10 that interrupts current in two directions (bidirectional) has been shown, an interrupting unit that interrupts current in one direction (unidirectional) may also be used.

[0042] According to the circuit breaker of this embodiment, in a microgrid that can accommodate AC or DC power, or both, multi-way branch points such as two-way, three-way, four-way, five-way, and six-way can be configured using one type (or a small number of types, such as a few types) of slot-type circuit breaker.

[0043] By controlling the ON / OFF of the circuit breaker according to this embodiment for each port, power routing is also possible.

[0044] Example 2 In this embodiment, a control method will be described in which a power supply system including a multi-way branch point as shown in FIG. 1 secures a power supply path by locking a 1:1 or n:n power supply path for a certain period of time to ensure safety, has an interlock function to prevent the power supply path from crossing with another power supply path while power is being supplied, and sets the current amount of OCP (Over Current Protection) in a circuit breaker so that a protective coordination function is performed when the power supply path branches during power supply.

[0045] For comparison, control in a conventional bidirectional power supply system will be described.

[0046] 14 is a diagram showing an example of a conventional bidirectional power supply system. A power supply system 920 for bidirectional power supply between site A and site B includes a power supply converter at each site. Site A is an example of a base building such as a communications building. Site B is, for example, an evacuation shelter.

[0047] Each converter communicates with the other (handshake) before sharing power. This allows for one-to-one, bidirectional power sharing between bases. Note that there may not be a circuit breaker between the bases that serves as a connection point.

[0048] 15 is a sequence diagram showing an example of the flow of a handshake in a conventional bidirectional power supply system. The converter installed at site A is designated as a first converter 931, and the converter installed at site B is designated as a second converter 932.

[0049] It is assumed that the first converter 931 is transmitting power (power transmission mode) and the second converter 932 is receiving power (power receiving mode). This state is referred to as state α. Furthermore, the state in which the first converter 931 is receiving power (power receiving mode) and the second converter 932 is transmitting power (power transmission mode) is referred to as state β.

[0050] 15 shows the transition flow from state α to state β. The first converter 931 stops power transmission (step S101). Next, the first converter 931 notifies the second converter 932 of the stoppage (step S102).

[0051] Upon receiving the notification of the stop, the second converter 932 notifies the first converter 931 of the start of power transmission (step S103). Upon receiving the notification of the start of power transmission, the first converter 931 changes the operation mode to the power receiving mode (step S104).

[0052] Next, the first converter 931 notifies the second converter 932 of the change in operation mode (step S105). Upon receiving the notification of the change in operation mode, the second converter 932 changes the operation mode to the power transmission mode (step S106). Through the above procedure, the transition from state α to state β is completed.

[0053] Next, a control procedure for the circuit breaker and the converter according to this embodiment will be described.

[0054] 16 is a diagram showing the configuration of a power supply system according to Example 2 of an embodiment of the present invention. Each base station is provided with a control device for controlling the converter at each base station and the circuit breakers arranged in the power supply network. Base station A is provided with a converter 50, a control device 60, and an insulation monitoring device 70.

[0055] The control device 60 includes a control unit 61, a storage unit 62, a determination unit 63, a monitoring unit 64, a display unit 65, and a communication unit 66. The control unit 61 controls the converter 50 and the circuit breaker 22. The storage unit 62 stores information such as threshold values ​​required for control.

[0056] The determination unit 63 performs determination processing to determine the operation mode of each converter, the power supply path, etc. The monitoring unit 64 monitors the operation mode of power supply by the converter 50 based on the detection results of an ammeter, a voltmeter, etc. The display unit 65 displays the control content. The communication unit 66 communicates with the database 80 and the control device 60 (installed at another base (base B, etc.)).

[0057] The database 80 stores trained models and the like generated by analysis, training, etc. The database 80 may be centralized or distributed.

[0058] Next, the operation of the control device 60 will be described.

[0059] FIG. 17 is a flowchart illustrating an example of the flow of a control process according to Example 2 of the embodiment of the present invention.

[0060] The control device 60 acquires basic data (step S201). The basic data may be, for example, GB operation time, X capacitor capacitance, cable impedance, fuse melting characteristics, power network configuration, slot-type circuit breaker information, currently locked route information, etc.

[0061] Next, the control device 60 acquires control data (step S202). The control data may be specifications of the converter capable of transmitting power, specifications of the converter capable of receiving power, PV power, SoC of the storage battery, load capacity, weather information, weather forecast information, etc. The control device 60 may also receive input of the control data.

[0062] Next, the determination unit 63 determines the operation mode of each converter (step S203). Specifically, when the converter 50 at site A is transmitting power to site B, the determination unit 63 controls the converter 50 at site B to be in the power receiving mode and not in the power transmitting mode. Here, the monitoring unit 64 detects that the converter 50 is in the power transmitting state by a control signal, a detector, etc.

[0063] Similarly, when the converter at site B is transmitting power to site A, the determining unit 63 controls the converter 50 at site A to be in the power receiving mode and not to be in the power transmitting mode.

[0064] Next, the determination unit 63 determines the power supply route (step S204). The method for determining the power supply route will be described in detail later.

[0065] Next, the communication unit 66 communicates between the control devices (step S205). When changing the operation mode as described above, the control device 60 may execute the handshake procedure shown in Fig. 15. Then, the control unit 61 transmits control signals to the converter 50 and the circuit breaker 22, respectively (step S206).

[0066] Next, the control unit 61 locks the power supply path and sets protection coordination (step S207). The method of locking the power supply path and setting protection coordination will be described later.

[0067] The control unit 61 transmits control signals to the converter 50 and the circuit breaker 22 in accordance with the settings (step S208). When a certain period of time has elapsed or when the control unit 61 detects that an emergency stop signal has been pressed, the control unit 61 unlocks the power supply path and resets the protection coordination (step S209).

[0068] Next, a method for determining the power supply path in step S204 of FIG. 17 will be described.

[0069] FIG. 18 is a flowchart illustrating an example of the flow of a power supply path determination process according to Example 2 of the embodiment of the present invention.

[0070] The determination unit 63 selects the shortest route from among available power supply routes connecting the bases (step S301). Next, the determination unit 63 selects the second shortest route from among available power supply routes connecting the bases (step S302).

[0071] 18 shows an example of a one-to-one power supply configuration, but the determination unit 63 may also set a current threshold for n-to-n power supply and perform a similar interlock. In the case of n-to-n power supply, in addition to interlocking based on the power transmission mode and power receiving mode, the interlock condition may also be that the sum of the transmitted power and the sum of the received power (+ transmission loss) match.

[0072] FIG. 19 is a first diagram for explaining a method for determining a power supply path according to Example 2 of the embodiment of the present invention.

[0073] 19 shows a method for determining a power supply path in the case of one-to-one power supply. In the case of one-to-one power supply, the determination unit 63 determines the shortest path and the second shortest path. By determining multiple power supply paths, it is possible to reduce the impedance of the power supply path and reduce wiring loss.

[0074] FIG. 20 is a second diagram for explaining the method for determining a power supply path according to Example 2 of the embodiment of the present invention.

[0075] 20 shows a method for determining a power supply path in the case of one-to-two power supply. In the case of one-to-two power supply, the determination unit 63 determines a path for supplying power from the second building 107 to the first electric vehicle 101 (path 1) and the second electric vehicle 102 (path 2), for example. Because the power supply line branches, it is necessary to limit the maximum current before and after the branch for protection coordination at the branch point.

[0076] Next, a method for locking the power supply path and setting protection coordination in step S207 in FIG. 17 will be described.

[0077] FIG. 21 is a diagram for explaining a method for setting locking of a power supply path and protection coordination according to Example 2 of an embodiment of the present invention.

[0078] The control unit 61 turns on all of the circuit breakers 22 installed on the power supply path connecting the converter 50 in the power transmission mode and the converter 50 in the power receiving mode. The control unit 61 also fixes all of the circuit breakers 22 installed on paths that intersect with the power supply path to the OFF position (interlock). The control unit 61 also recognizes that the other circuit breakers 22 are in a state where they can be used on other routes. In this way, the control unit 61 locks the power supply path.

[0079] Furthermore, the control unit 61 sets the OCP of the circuit breaker 22 according to the number of branching paths, such as fuses and molded case circuit breakers. In this way, the control unit 61 executes the setting of protection coordination, which eliminates the cost, time, etc. of constructing a new route.

[0080] The control device 60 can be realized, for example, by causing a computer to execute a program that describes the processing content described in this embodiment. Note that this "computer" may be a physical machine or a virtual machine on the cloud. When a virtual machine is used, the "hardware" described here is virtual hardware.

[0081] The above program can be recorded on a computer-readable recording medium (such as a portable memory) and stored or distributed. The above program can also be provided via a network such as the Internet or email.

[0082] Fig. 22 is a diagram showing an example of the hardware configuration of the computer. The computer in Fig. 22 includes a drive device 1000, an auxiliary storage device 1002, a memory device 1003, a CPU 1004, an interface device 1005, a display device 1006, an input device 1007, an output device 1008, and the like, all of which are interconnected via a bus B.

[0083] A program for realizing processing on the computer is provided by a recording medium 1001 such as a CD-ROM or a memory card. When the recording medium 1001 storing the program is set in the drive device 1000, the program is installed from the recording medium 1001 to the auxiliary storage device 1002 via the drive device 1000. However, the program does not necessarily have to be installed from the recording medium 1001, but may be downloaded from another computer via a network. The auxiliary storage device 1002 stores the installed program as well as necessary files, data, etc.

[0084] The memory device 1003 reads and stores a program from the auxiliary storage device 1002 when instructed to start the program. The CPU 1004 implements functions related to the device in accordance with the program stored in the memory device 1003. The interface device 1005 is used as an interface for connecting to a network. The display device 1006 displays a program-based graphical user interface (GUI), etc. The input device 1007 is composed of a keyboard, mouse, buttons, a touch panel, etc., and is used to input various operational instructions. The output device 1008 outputs calculation results. Note that the computer may be equipped with a graphics processing unit (GPU) or tensor processing unit (TPU) instead of the CPU 1004, or may be equipped with a GPU or TPU in addition to the CPU 1004. In this case, processing may be shared, for example, with the GPU or TPU performing processing requiring special calculations and the CPU 1004 performing other processing.

[0085] According to this embodiment, the control device 60 realizes the interlock function and the protection coordination function by setting the power supply route lock and the protection coordination. By using the interlock for a certain period of time, the cables (routes) related to power supply and power reception can be artificially separated from other power supply routes, creating an independent and safe route. Furthermore, no physical extension or renovation is required to change the route.

[0086] Furthermore, when converters exchange power in both directions, even if a short circuit occurs in outdoor wiring via a large resistance, not all converters will be in a power transmission state at the same time, making it possible to detect the accident.

[0087] This makes it possible to improve the safety of the power supply path in a power supply system that can accommodate a complex network.

[0088] Example 3 In this embodiment, an example in which the branch cutoff circuits are integrated will be described.

[0089] Fig. 23 is a diagram illustrating a conventional interrupter circuit. Internal circuit 12 includes switch 121, A, and B. A in Fig. 23 uses a capacitor or the like to suppress voltage fluctuations when the circuit is interrupted for a short period of time. B in Fig. 23 uses a capacitor, diode, or the like to suppress overvoltage when the circuit is interrupted for a long period of time.

[0090] Fig. 24 is a diagram for explaining a conventional branch cutoff circuit. Conventionally, branching has been achieved by arranging the circuits shown in Fig. 23, as shown in internal circuits 12-1 to 12-3 in Fig. 24. In other words, conventionally, branch cutoff circuits have not been considered as an integrated device.

[0091] 25 is a diagram showing an example of a branch circuit breaker circuit according to Example 3 of an embodiment of the present invention. As shown in Example 2, by controlling the operation of each circuit breaker in a coordinated manner, the connection of load devices and the like on the connection point side of each circuit breaker is eliminated, making capacitors, diodes, and the like unnecessary. Therefore, these are eliminated to create an integrated configuration (systemization).

[0092] FIG. 26 is a diagram showing an example of a housing of a circuit breaker according to Example 3 of an embodiment of the present invention. Housing 23 has a capacitor box in the seventh slot. The slot may be replaced depending on conditions (rated current, voltage suppression level, etc.). Capacitors that are prone to deterioration may also be slotted and replaced.

[0093] Fig. 27 is a diagram showing an example of a circuit breaker circuit according to Example 3 of an embodiment of the present invention. As shown in the example of the double-line diagram in Fig. 27, by installing a capacitor 90 on the output side of each port, the branch breaking circuit shown in Fig. 25 can be realized.

[0094] According to this embodiment, the capacitors and diodes on the connection point side of each circuit breaker are eliminated to form an integrated configuration. This reduces the cost of the circuit breaker and makes it possible to reduce its size. Therefore, it is possible to realize an integrated branch circuit breaker that can be used in a complex network.

[0095] (Summary of the embodiment) This specification describes at least the control device, power supply system, control method, and program described in the following sections. (Section 1) a communication unit configured to communicate with a control device of another base station in the power supply system before power interchange; a control unit configured to lock the power supply path for a certain period of time and control a converter and a circuit breaker disposed in the power supply network based on the determined power supply path so as not to cross another power supply path during power supply; Control device. (Section 2) The control unit is configured to set the current amount of overcurrent protection in the circuit breaker so as to achieve protection coordination. 2. The control device according to claim 1. (Section 3) The power supply path is determined under the condition that a sum of transmitted power and a sum of received power are equal to each other. 3. The control device according to claim 1 or 2. (Section 4) The power supply route is determined as a plurality of routes including a shortest route. 3. The control device according to claim 1 or 2. (Section 5) A power supply system including a control device, a converter, and a circuit breaker, the circuit breaker is arranged in a power supply network; The control device a communication unit configured to communicate with a control device of another base station in the power supply system before power interchange; a control unit configured to lock a power supply path for a certain period of time and control the converter and the circuit breaker based on the determined power supply path so that the power supply path does not cross another power supply path during power supply. Power supply system. (Section 6) A control method executed by a control device, communicating with a control device at another base station in the power supply system before power interchange; locking the power supply path for a certain period of time and controlling the converter and a circuit breaker disposed in the power supply network based on the determined power supply path so that the power supply path does not intersect with another power supply path during power supply; Control method. (Section 7) On the computer, communicating with a control device at another base station in the power supply system before power interchange; locking the power supply path for a certain period of time and controlling the converter and a circuit breaker disposed in the power supply network based on the determined power supply path so that the power supply path does not intersect with another power supply path during power supply; A program to execute.

[0096] Although the present embodiment has been described above, the present invention is not limited to such a specific embodiment, and various modifications and changes are possible within the scope of the gist of the present invention described in the claims. [Explanation of symbols]

[0097] 1 Power supply system 10. Breaking unit 11 Connector 12 Internal circuit 20,21 Housing 22 Circuit Breaker 30 slots 40 Breaking unit 50 converter 60 Control device 61 Control Unit 62 Storage section 63 Judgment section 64 Monitoring Department 65 Display section 66 Communications Department 70 Insulation monitoring device 80 databases 101 First Electric Vehicle 102 Second Electric Vehicle 103 First Solar Power Generation Facility 104 Wind power generation facilities 105 Second solar power generation facility 106 First Building 107 Second Building 108 Train 109 First Data Center 110 Second Data Center 111 Charging equipment 121 Switch 122 capacitor 123 Diode 901 Two-way circuit breaker 902 Three-way circuit breaker 903 Four-way circuit breaker 904 Five-way circuit breaker 905 Six-way circuit breaker 1000 Drive Device 1001 Recording media 1002 Auxiliary storage device 1003 Memory device 1004 CPU 1005 Interface device 1006 Display device 1007 Input Device 1008 Output Device

Claims

1. a communication unit configured to communicate with a control device of another base station in the power supply system before power interchange; A control device comprising: a control unit configured to lock a power supply path for a certain period of time and control a converter and a circuit breaker disposed in the power supply network based on the power supply path determined so as not to intersect with another power supply path during power supply; The power supply path is determined under the condition that a sum of transmitted power and a sum of received power are equal to each other. Control device.

2. The control unit is configured to set the current amount of overcurrent protection in the circuit breaker so as to achieve protection coordination. The control device according to claim 1 .

3. The power supply route is determined as a plurality of routes including a shortest route. The control device according to claim 1 or 2.

4. A power supply system including a control device, a converter, and a circuit breaker, the circuit breaker is arranged in a power supply network; The control device a communication unit configured to communicate with a control device of another base station in the power supply system before power interchange; a control unit configured to lock a power supply path for a certain period of time and control the converter and the circuit breaker based on a power supply path determined so as not to intersect with another power supply path during power supply; The power supply path is determined under the condition that a sum of transmitted power and a sum of received power are equal to each other. Power supply system.

5. A control method executed by a control device, communicating with a control device at another base station in the power supply system before power interchange; locking the power supply path for a certain period of time and controlling the converter and a circuit breaker disposed in the power supply network based on the determined power supply path so as not to intersect with another power supply path during power supply, The power supply path is determined under the condition that a sum of transmitted power and a sum of received power are equal to each other. Control method.

6. On the computer, communicating with a control device at another base station in the power supply system before power interchange; a step of locking the power supply path for a certain period of time and controlling a converter and a circuit breaker disposed in the power supply network based on the power supply path determined so as not to cross with another power supply path during power supply, The power supply path is determined under the condition that a sum of transmitted power and a sum of received power are equal to each other. program.

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