Distributed power source control system, power source control device, and distributed power source control method

Abstract

To provide a distributed power source control system, a power source control device, and a distributed power source control method that make it possible to use power effectively on regional independent grids that do not cause any defects when there are two or more regional independent power grids in an area divided by an area switch.SOLUTION: A distributed power source control system 1 includes a micro grid (MG) 100 having a plurality of distributed power sources and a power source control device. The plurality of distributed power sources is connected to each of two or more regional independent grids that exist in an area divided by an area switch 13 that is controlled by a management server that manages power grids. The power source control device controls the distributed power sources. The power source control device performs a first procedure to check whether defects have occurred in each of the two or more regional independent grids and a second procedure for performing independent operation of the regional independent grids that does not cause any defects without performing independent operation of the regional independent grids that is causing defects when an area is disconnected by the area switch.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] In recent years, the use of distributed power sources such as solar cell devices, power storage devices, and fuel cell devices has been attracting attention. For example, a section (regional independent system) that can be disconnected from the power system by a sectionalizing switch is also known. In a regional independent system disconnected from the power system by a sectionalizing switch, an operation (hereinafter, isolated operation) is known in which power is supplied from a distributed power source to a load (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-70448 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, when a fault occurs in the power system, the general electricity transmission and distribution company may disconnect the area including the power system where the fault occurred (hereinafter, the fault area) by controlling an area switch controlled by the general electricity transmission and distribution company in order to identify the fault location in the power system. The area partitioned by the area switch is an area that indicates an area including a region, a facility, etc.

[0005] As a result of careful consideration, the inventors focused on cases where there are two or more regional independent grids in a faulty area, and discovered the need to effectively utilize the electricity from regional independent grids that are not experiencing any faults.

[0006] Therefore, the present invention has been made to solve the above-mentioned problems, and aims to provide a distributed power supply control system, a power supply control device, and a distributed power supply control method that enable effective utilization of power from a regional independent system that is not experiencing any malfunctions when there are two or more regional independent systems in an area partitioned by an area switch. [Means for solving the problem]

[0007] An aspect of the disclosure is a distributed power source control system that includes a distributed power source connected to each of two or more regional independent systems that exist in an area partitioned by an area switch controlled by a management server that manages the power system, and a power source control device that controls the distributed power sources, wherein when the area is disconnected by the area switch, the power source control device executes a first procedure of checking whether or not a malfunction has occurred in each of the two or more regional independent systems, and executes a second procedure of performing independent operation of a regional independent system that is not experiencing the malfunction, without performing independent operation of the regional independent system in which the malfunction has occurred.

[0008] An aspect of the disclosure is a power supply control device that controls distributed power sources connected to each of two or more regional independent systems that exist in an area partitioned by an area switch controlled by a management server that manages the power system, and when the area is disconnected by the area switch, the power supply control device is provided with a control unit that executes a first procedure of checking whether a malfunction has occurred in each of the two or more regional independent systems, and the control unit executes a second procedure of performing independent operation of a regional independent system that is not experiencing the malfunction, without performing independent operation of the regional independent system in which the malfunction has occurred.

[0009] An aspect of the disclosure is a distributed power source control method comprising: a step A in which a power source control device controls distributed power sources connected to each of two or more regional independent systems present in an area partitioned by an area switch controlled by a management server that manages the power system, and when the area is disconnected by the area switch, the power source control device executes a first procedure of checking whether a malfunction has occurred in each of the two or more regional independent systems; and a step B in which the power source control device executes a second procedure of performing independent operation of a regional independent system that is not experiencing the malfunction, without performing independent operation of the regional independent system in which the malfunction has occurred. Effect of the Invention

[0010] According to the present invention, when there are two or more regional independent systems in an area partitioned by an area switch, it is possible to provide a distributed power supply control system, a power supply control device, and a distributed power supply control method that enable effective utilization of power from regional independent systems that are not experiencing any malfunctions. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing a distributed power supply control system 1 according to an embodiment. [Diagram 2] FIG. 2 is a diagram showing the MG 100 according to the embodiment. [Diagram 3] FIG. 3 is a diagram showing the MG_EMS 150 according to the embodiment. [Figure 4] FIG. 4 is a diagram showing the MG server 300 according to the embodiment. [Diagram 5] FIG. 5 is a diagram for explaining an operation example 1 according to the embodiment. [Figure 6] FIG. 6 is a diagram for explaining an operation example 2 according to the embodiment. [Figure 7] FIG. 7 is a diagram for explaining an operation example 3 according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, the embodiments will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic.

[0013] [Embodiment] (Distributed Power Control System) A distributed power supply control system according to an embodiment will be described below.

[0014] 1, the distributed power supply control system 1 has an MG (Micro Grid) 100. The distributed power supply control system 1 may include a substation 10, a management server 200, or an MG server 300. The MG 100 is a section (regional independent power system) that can be disconnected from the power system 12 by a sectional switch 191 described later, and is an area downstream of the sectional switch 191. Downstream means a direction away from the substation 10.

[0015] The substation 10 is connected to an electric power grid 12 and transforms the voltage of the electric power grid 12. The substation 10 may replace a generating station or a baseload power source.

[0016] The MG 100 is connected to the power system 12. The MG 100 can be electrically connected to the substation 10 or the power system 12 by an area switch 13, and can be electrically disconnected from the substation 10 or the power system 12 by the area switch 13. The MG 100 may be referred to as a local independent system. The MG 100 may be a unit (e.g., a village, a town) that utilizes a distributed power source in the area. The MG 100 may be a complex facility including two or more facilities.

[0017] In FIG. 1, MG100A to MG100C are illustrated as examples of MG100. MG100A to MG100C exist in an area partitioned by an area switch 13. An area is an area including a region, a facility, and the like. Hereinafter, the power system 12 upstream of the area switch 13 is referred to as a power system 12A, and the power system 12 downstream of the area switch 13 is referred to as a power system 12B. The power system 12A may be referred to as a first power system, and the power system 12B may be referred to as a second power system. Upstream may be considered to be a term indicating a side closer to the substation 10, and downstream may be considered to be a term indicating a side farther from the substation 10.

[0018] In the embodiment, MG100A is arranged upstream of MG100B and MG100C, and MG100B is arranged upstream of MG100C. Note that "upstream" may be considered as a term indicating the side closer to the substation 10 (area switch 13). Details of MG100 will be described later (see FIG. 2).

[0019] The management server 200 is a server managed by a business operator. The business operator may be a general electricity transmission and distribution business operator or a general electric utility that manages the power grid 12. The management server 200 may be capable of communicating with a device (for example, an MG_EMS 150 described later) installed in the MG 100. The management server 200 connects the MG 100 to the power grid 12A or disconnects the MG 100 from the power grid 12A by controlling the area switch 13. Hereinafter, the management server 200 may also be referred to as a general electricity transmission and distribution business operator.

[0020] In the embodiment, the management server 200 is an example of a management server that manages the power system 12 connected to the regional independent system (MG100).

[0021] The MG server 300 is a server that comprehensively manages MG 100A to MG 100C. The MG server 300 may be capable of communicating with devices (for example, MG_EMS 150 described later) installed in MG 100. The MG server 300 may be capable of communicating with management server 200. The function of the MG server 300 may be substituted by any one of the devices (for example, MG_EMS 150 described later) installed in MG 100. Details of the MG server 300 will be described later (see FIG. 4).

[0022] (Regional independent system) The following describes a regional grid (MG) according to an embodiment. As shown in Fig. 2, the MG 100 includes a distributed power source 110, a switch 121, a load 130, a switch 131, an MG_EMS (Energy Management System) 150, a section switch 191, and a transfer trip function (hereinafter, TTS) 192.

[0023] The distributed power source 110 is connected to a power line 14 in the MG 100. The power line 14 may be referred to as an area independent system. The distributed power source 110 has a power source 111 and a PCS (Power Conditioning System) 112. The power source 111 may be a solar cell device, a power storage device, or a fuel cell device. The PCS 112 converts the output voltage of the power source 111. When the power source 111 is a power storage device, the PCS 112 converts the input voltage of the power storage device in addition to the output voltage of the power storage device.

[0024] In FIG. 2, the distributed power source 110 is exemplified by a distributed power source 110A having a power source 111A and a PCS 112A, and a distributed power source 110B having a power source 111B and a PCS 112B.

[0025] The switch 121 is disposed between the distributed power source 110 and the power line 14. The switch 121 connects the distributed power source 110 to the power line 14 or disconnects the distributed power source 110 from the power line 14.

[0026] In FIG. 2, the switch 121 is exemplified by a switch 121A that connects / disconnects the distributed power source 110A and a switch 121B that connects / disconnects the distributed power source 110B.

[0027] In the embodiment, when a power outage is detected in MG100, the distributed power source 110 may transition from an operation in a state where it is connected to MG100 (power line 14) (independent operation of MG100 described below) to an independent operation in a state where it is disconnected from MG100 (power line 14). In other words, when a power outage is detected in MG100, the switch 121 may disconnect the distributed power source 110 from the power line 14. The disconnection of the distributed power source 110 may be executed autonomously by the switch 121 or may be executed by MG_EMS 150.

[0028] The load 130 is a device that consumes power. For example, the load 130 may include an air conditioner, a heat pump water heater, a lighting device, and the like.

[0029] MG_EMS 150 is connected to the distributed power sources 110 and the switches 121, and controls the distributed power sources 110 and the switches 121. MG_EMS 150 is connected to the loads 130 and the switches 131, and controls the loads 130 and the switches 131. Details of MG_EMS 150 will be described later (see FIG. 3).

[0030] In the embodiment, the MG_EMS 150 is an example of a power supply control device that controls the distributed power supplies 110 .

[0031] The section switch 191 is disposed between the power system 12B and the MG 100 (the power line 14). The section switch 191 connects the MG 100 to the power system 12B or disconnects the MG 100 from the power system 12B.

[0032] The TTS 192 may receive a disconnection signal from the MG_EMS 150 to disconnect the MG 100 from the power system 12B. The TTS 192 controls the sectional switch 191 in response to the disconnection signal to disconnect the MG 100 from the power system 12B. The TTS 192 may receive a connection signal from the MG_EMS 150 to connect the MG 100 to the power system 12B. The TTS 192 may control the sectional switch 191 in response to the connection signal to connect the MG 100 to the power system 12B.

[0033] In the embodiment, the operating states of the distributed power source 110 may include the operating states shown below. Specifically, the operating state of the distributed power source 110 may include a grid-connected operation in which the distributed power source 110 is connected to the power line 14. The operating state of the distributed power source 110 may include an independent operation in which the distributed power source 110 is disconnected from the power line 14. The operating state of the distributed power source 110 may include a stopped state in which the distributed power source 110 is stopped.

[0034] Here, the interconnected operation of the distributed power source 110 may include an interconnected operation in a state where the MG 100 is interconnected to the power system 12B by the sectional switch 191 and the distributed power source 110 is interconnected to the power line 14. The interconnected operation of the distributed power source 110 may also include an interconnected operation in a state where the MG 100 is disconnected from the power system 12B by the sectional switch 191 and the distributed power source 110 is interconnected to the power line 14.

[0035] Furthermore, in a state where MG100 is disconnected from power system 12A by area switch 13, the state where dispersed power source 110 operates in the interconnected operation may be referred to as isolated operation of MG100. That is, the isolated operation of MG100 may include a first isolated operation in which MG100 is connected to power system 12B by section switch 191, and a second isolated operation in which MG100 is disconnected from power system 12B by section switch 191.

[0036] The independent operation of the distributed power source 110 may include an operation in a state where the MG 100 is connected to the power system 12B by the sectional switch 191, and the distributed power source 110 is disconnected from the power line 14. The independent operation of the distributed power source 110 may include an operation in a state where the MG 100 is disconnected from the power system 12B by the sectional switch 191, and the distributed power source 110 is disconnected from the power line 14.

[0037] (Power supply control device) The power supply control device (MG_EMS) according to the embodiment will be described below. As shown in FIG.

[0038] The communication unit 151 is configured by a communication module. The communication module may be a wireless communication module conforming to a standard such as IEEE802.11a / b / g / n / ac / ax, ZigBee, Wi-SUN, LTE, 5G, or 6G, or may be a wired communication module conforming to a standard such as IEEE802.3.

[0039] First, the communication unit 151 may execute communication with the management server 200. For example, the communication unit 151 may receive a power outage signal from the management server 200 in response to a malfunction (e.g., a power outage) in the power grid 12. The communication unit 151 may receive a power restoration signal from the management server 200 in response to elimination of the malfunction (e.g., restoration of power) in the power grid 12.

[0040] Secondly, the communication unit 151 may communicate with the distributed power source 110. For example, the communication unit 151 may transmit a control command to the distributed power source 110 to control the distributed power source 110. The communication unit 151 may receive state information indicating the operation state (grid-connected operation or independent operation) of the distributed power source 110 from the distributed power source 110.

[0041] The management unit 152 is configured with a storage medium such as a hard disk drive (HDD), a solid state drive (SSD), or a non-volatile memory.

[0042] For example, the management unit 152 may manage location information that specifies the location of the MG 100. The management unit 152 may manage the specifications of the distributed power sources 110 installed in the MG 100. The specifications may include the rated power generation of the solar cell device, the rated charging power of the power storage device, the rated discharging power of the power storage device, and the rated output power of the fuel cell device. The specifications may include the rated capacity and maximum charging / discharging power of the power storage device.

[0043] The control unit 153 may include at least one processor. The at least one processor may be configured by a single integrated circuit (IC), or may be configured by a plurality of circuits (such as integrated circuits and / or discrete circuits) communicatively connected to each other.

[0044] For example, the control unit 153 may control the communication unit 151 to transmit, in response to a power failure signal, a disconnection signal for disconnecting the MG 100 from the power grid 12B to the TTS 192. The control unit 153 may control, in response to a power restoration signal, the communication unit 151 to transmit, in response to a power restoration signal, a connection signal for connecting the MG 100 to the power grid 12B to the TTS 192.

[0045] (MG Server) The MG server according to the embodiment will be described below. As shown in FIG.

[0046] The communication unit 310 is configured by a communication module. The communication module may be a wireless communication module conforming to standards such as IEEE802.11a / b / g / n / ac / ax, ZigBee, Wi-SUN, LTE, 5G, and 6G, or may be a wired communication module conforming to standards such as IEEE802.3.

[0047] First, the communication unit 310 may execute communication with the management server 200. For example, the communication unit 310 may receive a power outage signal from the management server 200 in response to a malfunction (e.g., a power outage) in the power grid 12. The communication unit 310 may receive a power restoration signal from the management server 200 in response to the elimination of the malfunction (e.g., power restoration) in the power grid 12.

[0048] Secondly, the communication unit 310 may execute communication with the distributed power source 110. For example, the communication unit 310 may transmit a control command to the distributed power source 110 to control the distributed power source 110. The communication unit 310 may receive status information indicating the operating status (grid-connected operation or independent operation) of the distributed power source 110 from the distributed power source 110.

[0049] Secondly, the communication unit 310 may communicate with the MG_EMS 150. For example, the communication unit 310 may transmit to the MG_EMS 150 a control command for controlling the distributed power source 110. The communication unit 310 may receive from the MG_EMS 150 status information indicating the operating status (grid-connected operation or independent operation) of the distributed power source 110.

[0050] The management unit 320 is configured with a storage medium such as a hard disk drive (HDD), a solid state drive (SSD), or a non-volatile memory.

[0051] For example, the management unit 320 may manage the state of each MG 100. The state of MG 100 may include whether or not the MG 100 is operating independently. The state of MG 100 may include whether or not the MG 100 is connected to the power system 12B via the section switch 191. The state of MG 100 may include whether or not the MG 100 is connected to the power system 12A via the area switch 13.

[0052] The control unit 330 may include at least one processor. The at least one processor may be configured by a single integrated circuit (IC), or may be configured by a plurality of circuits (such as integrated circuits and / or discrete circuits) communicatively connected to each other.

[0053] For example, the control unit 330 may execute the following operations.

[0054] First, the control unit 330 may execute a first procedure of checking whether or not a malfunction has occurred in each of the two or more regional independent systems (MG100A to MG100C) when the area (MG100A to MG100C) is disconnected by the area switch 13. The first procedure may include a procedure of receiving a result of checking whether or not a malfunction has occurred in each MG100. The checking whether or not a malfunction has occurred in each MG100 may be performed via a technician or without the intervention of a technician.

[0055] Secondly, the control unit 330 may execute a second procedure for independently operating a non-failed MG 100 without independently operating a failed MG 100. The second procedure may include a procedure for transmitting to MG_EMS 150 an instruction to permit independent operation of MG 100, or a procedure for transmitting to MG_EMS 150 an instruction not to permit independent operation of MG 100.

[0056] Although not particularly limited, operations completed by each of two or more MGs 100 may be executed by MG_EMS 150 installed in each MG 100, without being controlled by MG server 300. However, operations completed by each of two or more MGs 100 may also be executed by MG server 300, or may be executed by MG_EMS 150 under the control of MG 300. For example, the first procedure may be considered to be an example of operations completed by each of two or more MGs 100.

[0057] Although not particularly limited, an operation requiring cooperation between two or more MGs 100 may be executed by the MG server 300. For example, the second procedure may be considered to be an example of an operation requiring cooperation between two or more MGs 100.

[0058] (Example of operation) An operation example according to the embodiment will be described below. In the following, a case is assumed in which two or more MGs 100 exist in an area partitioned by an area switch 13 controlled by a management server 200 that manages the power system 12. A case in which a malfunction occurring in the power system 12 is a power outage will be illustrated.

[0059] As an initial state of the operation example shown below, it is assumed that two or more MGs 100 are connected to the power system 12A by the area switch 13, and each MG 100 is connected to the power system 12B by the section switch 191. As an operation example, the operation example shown below is considered.

[0060] (Example 1) In the first operational example, as shown in FIG. 5, a power outage occurs in the power grid 12 in step S10.

[0061] In step S11, two or more MGs 100 are disconnected from the power grid 12A by the area switch 13. The area switch 13 is controlled by the management server 200.

[0062] In step S12, each MG 100 is disconnected from the power system 12B by the sectional switch 191. The sectional switch 191 may be controlled by the MG_EMS 150 or may be controlled by the MG server 300.

[0063] In step S13, the MG server 300 selects an MG 100 (target MG) for which it is to be confirmed whether or not a malfunction has occurred. The target MG is at least one MG 100 selected from two or more MGs 100. The target MG may be selected in order of proximity to the area switch 13.

[0064] In step S14, the MG server 300 judges whether the target MG is normal. If the MG server 300 receives a confirmation result indicating that no malfunction has occurred in the target MG, the MG server 300 may judge that the target MG is normal. If the MG server 300 receives a confirmation result indicating that a malfunction has occurred in the target MG, the MG server 300 may judge that the target MG is not normal.

[0065] In step S15, the MG server 300 transmits an instruction to the target MG to permit independent operation of the target MG. The target MG executes independent operation. Specifically, the target MG is disconnected from the power system 12A by the area switch 13 and is disconnected from the power system 12B by the section switch 191, and the target MG starts independent operation.

[0066] In step S16, the MG server 300 judges whether or not all MGs 100 have been selected as target MGs. If all MGs 100 have been selected as target MGs, the MG server 300 ends the series of processes. If none of the MGs 100 have been selected as target MGs, the MG server 300 executes the process of step S13.

[0067] In the operation example 1, step S14 is an example of the first procedure. That is, in the operation example 1, the MG server 300 executes the first procedure in a state in which each of the two or more MGs 100 is disconnected from the power system 12B.

[0068] In the operation example 1, step S15 is an example of the second procedure. That is, in the operation example 1, the MG server 300 executes an independent operation of the MG 100 having no malfunction, without connecting the MG 100 having no malfunction to the power system 12B.

[0069] In operation example 1, the operation of the MG server 300 has been mainly described, but operations that are completed in each MG 100 may be executed by the MG_EMS 150 without being controlled by the MG server 300, or may be executed by the MG_EMS 150 under the control of the MG server 300.

[0070] (Example 2) In the second operation example, as shown in FIG. 6, a power outage occurs in the power grid 12 in step S20.

[0071] In step S21, two or more MGs 100 are disconnected from the power grid 12A by the area switch 13. The area switch 13 is controlled by the management server 200.

[0072] In step S22, each MG 100 is disconnected from the power system 12B by the sectional switch 191. The sectional switch 191 may be controlled by the MG_EMS 250 or may be controlled by the MG server 300.

[0073] In step S23, the MG server 300 selects an MG 100 (target MG) for which it is to be confirmed whether or not a malfunction has occurred. The target MG is at least one MG 100 selected from two or more MGs 100. The target MG may be selected in order of proximity to the area switch 13.

[0074] In step S24, the MG server 300 judges whether the target MG is normal. If the MG server 300 receives a confirmation result indicating that no malfunction has occurred in the target MG, the MG server 300 may judge that the target MG is normal. If the MG server 300 receives a confirmation result indicating that a malfunction has occurred in the target MG, the MG server 300 may judge that the target MG is not normal.

[0075] In step S25, the MG server 300 transmits an instruction to the target MG to permit the independent operation of the target MG. The target MG executes the independent operation. Specifically, the target MG is disconnected from the power system 12A by the area switch 13 and the target MG is disconnected from the power system 12B by the section switch 191, and the independent operation of the target MG starts.

[0076] In step S26, the MG server 300 connects the target MG to the power grid 12B via the section switch 191.

[0077] In step S27, the MG server 300 judges whether the interconnection of the target MG is normal or not. When the MG server 300 receives a confirmation result indicating that no malfunction has occurred in the power system 12B due to the interconnection of the target MG, the MG server 300 may judge that the interconnection of the target MG is normal. When the MG server 300 receives a confirmation result indicating that a malfunction has occurred in the power system 12B due to the interconnection of the target MG, the MG server 300 may judge that the interconnection of the target MG is not normal.

[0078] In step S28, the MG server 300 causes the section switch 191 to disconnect the target MG from the power grid 12B.

[0079] In step S29, the MG server 300 judges whether or not all MGs 100 have been selected as target MGs. If all MGs 100 have been selected as target MGs, the MG server 300 ends the series of processes. If all MGs 100 have not been selected as target MGs, the MG server 300 executes the process of step S23.

[0080] In the operation example 2, step S24 is an example of the first procedure. That is, in the operation example 2, the MG server 300 executes the first procedure in a state in which each of the two or more MGs 100 is disconnected from the power system 12B.

[0081] In the operation example 2, step S25 is an example of the second procedure. That is, in the operation example 2, when no malfunction occurs in the power system 12B due to the interconnection of MG100, the MG server 300 executes independent operation of the MG 100 that is not malfunctioning with the MG 100 interconnected to the power system 12B. On the other hand, when a malfunction occurs in the power system 12B due to the interconnection of MG100, the MG server 300 executes independent operation of the MG 100 that is not malfunctioning with the MG 100 disconnected from the power system 12B.

[0082] In the second operation example, steps S26 and S27 are an example of a procedure for connecting a target MG, which is at least one of two or more MGs 100, to the power system 12B when no malfunction occurs due to the connection of the target MG.

[0083] In operation example 2, the operation of the MG server 300 has been mainly described, but operations that are completed in each MG 100 may be executed by MG_EMS 150 without the control of the MG server 300, or may be executed by MG_EMS 150 under the control of the MG server 300.

[0084] (Example 3) In the third operation example, as shown in FIG. 7, a power outage occurs in the power grid 12 in step S30.

[0085] In step S31, two or more MGs 100 are disconnected from the power grid 12A by the area switch 13. The area switch 13 is controlled by the management server 200.

[0086] In step S32, the MG server 300 selects an MG 100 (target MG) for which it is to be confirmed whether or not a malfunction has occurred. The target MG is at least one MG 100 selected from two or more MGs 100. The target MG may be selected in order of proximity to the area switch 13.

[0087] In step S33, the MG server 300 judges whether the target MG is normal. If the MG server 300 receives a confirmation result indicating that no malfunction has occurred in the target MG, the MG server 300 may judge that the target MG is normal. If the MG server 300 receives a confirmation result indicating that a malfunction has occurred in the target MG, the MG server 300 may judge that the target MG is not normal.

[0088] In step S34, the MG server 300 transmits an instruction to the target MG to permit the independent operation of the target MG. The target MG executes the independent operation. Specifically, the target MG is disconnected from the power system 12A by the area switch 13 and connected to the power system 12B by the section switch 191, and the independent operation of the target MG starts.

[0089] In step S35, the target MG is disconnected from the power system 12B by the section switch 191. The section switch 191 may be controlled by the MG_EMS 350 or may be controlled by the MG server 300.

[0090] In step S36, the MG server 300 judges whether the interconnection of the target MG is normal. When the MG server 300 receives a confirmation result indicating that no malfunction has occurred in the power system 12B, the MG server 300 may judge that the interconnection of the target MG is normal. When the MG server 300 receives a confirmation result indicating that a malfunction has occurred in the power system 12B, the MG server 300 may judge that the interconnection of the target MG is not normal.

[0091] In step S37, the target MG is disconnected from the power system 12B by the section switch 191. The section switch 191 may be controlled by the MG_EMS 350 or may be controlled by the MG server 300.

[0092] In step S38, the MG server 300 judges whether or not all MGs 100 have been selected as target MGs. If all MGs 100 have been selected as target MGs, the MG server 300 ends the series of processes. If all MGs 100 have not been selected as target MGs, the MG server 300 executes the process of step S33.

[0093] In the operation example 3, step S33 is an example of the first procedure. That is, in the operation example 3, the MG server 300 executes the first procedure in a state in which each of the two or more MGs 100 is connected to the power system 12B.

[0094] In the operation example 3, step S34 is an example of the second procedure. That is, in the operation example 3, when no malfunction occurs in the power system 12B due to the interconnection of MG100, the MG server 300 executes independent operation of the MG 100 that is not malfunctioning with the MG 100 interconnected to the power system 12B. On the other hand, when a malfunction occurs in the power system 12B due to the interconnection of MG100, the MG server 300 executes independent operation of the MG 100 that is not malfunctioning with the MG 100 disconnected from the power system 12B.

[0095] In the operation example 3, steps S36 and S37 are an example of a procedure for disconnecting a target MG, which is at least one of two or more MGs 100, from the power grid 12B when a malfunction occurs due to the interconnection of the target MG.

[0096] In the operation example 3, steps S32, S33, and S35 are an example of a procedure for disconnecting the MG 100 in which a malfunction has occurred from the power system 12B in order from the side closest to the area switch 13.

[0097] In operation example 3, the operation of the MG server 300 has been mainly described, but operations that are completed in each MG 100 may be executed by MG_EMS 150 without the control of the MG server 300, or may be executed by MG_EMS 150 under the control of the MG server 300.

[0098] (Action and Effects) In the embodiment, the MG server 300 may execute a first procedure of checking whether or not a malfunction has occurred in each of the two or more MGs 100 when an area (MGs 100A to MGs 100C) is disconnected by the area switch 13. The MG server 300 may execute a second procedure of independently operating the MGs 100 that are not malfunctioning, without independently operating the MGs 100 that are malfunctioning. With this configuration, in a case where two or more MGs 100 exist in an area partitioned by the area switch 13, it is possible to effectively use power for the MGs 100 that are not malfunctioning.

[0099] In the embodiment, the MG server 300 may connect the target MG, which is at least one of the two or more MGs 100, to the power grid 12B when no malfunction occurs due to the connection of the target MG (for example, operation example 2). With this configuration, when a case is assumed in which two or more MGs 100 exist in an area partitioned by the area switch 13, power can be appropriately exchanged between the MGs 100.

[0100] In the embodiment, the MG server 300 may disconnect the target MG, which is at least one of the two or more MGs 100, from the power grid 12B when a problem occurs due to the interconnection of the target MG (for example, operation example 3). With this configuration, in a case where two or more MGs 100 exist in an area partitioned by the area switch 13, power can be appropriately exchanged between the MGs 100.

[0101] [Change Example 1] Modification 1 of the embodiment will be described below. Differences from the embodiment will be mainly described below.

[0102] In the first modification, the MG server 300 may transmit the result of the first procedure to the management server 200.

[0103] For example, the result of the first procedure may include whether or not a malfunction has occurred in MG100. The result of the first procedure may include whether or not a malfunction has occurred in power system 12B due to the interconnection of MG100. The result of the first procedure may include information indicating the state of each MG100. The state of MG100 may include whether or not independent operation of MG100 is being performed. The state of MG100 may include whether or not MG100 is interconnected to power system 12B by section switch 191.

[0104] [Change Example 2] Modification 2 of the embodiment will be described below. Differences from the embodiment will be mainly described below.

[0105] In the second modification, the MG server 300 may execute the second procedure if permitted by the management server 200.

[0106] First, when a power outage is detected in the MG 100, the MG_EMS 150 or the MG server 300 may transmit a permission request including at least information indicating the state of the MG 100 to the management server 200.

[0107] Here, the state of MG100 may include whether or not a malfunction has occurred in power line 14. The state of MG100 may include whether or not a malfunction has occurred in distributed power source 110. The state of MG100 may include whether or not a malfunction has occurred in load 130. The state of MG100 may include whether or not section switch 191 is closed. The state of MG100 may include the operating state of distributed power source 110.

[0108] The permission request may include location information that specifies the location of MG 100. The location information may be a code assigned to MG 100, may be the geographical location (e.g., latitude and longitude) of MG 100, or may be the name of the city, town, or village in which MG 100 is located.

[0109] The communication unit 151 may transmit to the management server 200 a shutdown notification signal notifying that the distributed power source 110 has been shut down.

[0110] Secondly, the MG_EMS 150 or the MG server 300 may receive, from the management server 200, a permission response that permits the MG 100 to operate independently in the MG 100.

[0111] Here, in response to receiving the permission response, the MG_EMS 150 or the MG server 300 may start the independent operation of the MG 100. Receiving the permission response is an example of a case where permission is granted by the management server 200.

[0112] The operation of modification example 2 (sending a permission request and receiving a permission response) may be performed in step S15 of operation example 1 (see Figure 5), step S25 of operation example 2 (see Figure 6), and step S34 of operation example 3 (see Figure 7).

[0113] [Other embodiments] Although the present invention has been described by the above-mentioned embodiment, the description and drawings forming a part of this disclosure should not be understood as limiting the present invention. From this disclosure, various alternative embodiments, examples and operating techniques will become apparent to those skilled in the art.

[0114] In the above disclosure, the power supply control device that controls the distributed power supply 110 may be the MG server 300, may be the MG_EMS 150, or may be a combination of the MG_EMS 150 and the MG server 300.

[0115] Although not specifically mentioned in the above disclosure, a case may be assumed in which a load is connected to the distributed power source 110 when the distributed power source 110 performs an independent operation.

[0116] Although not specifically mentioned in the above disclosure, whether or not a malfunction occurs in the MG 100 may be automatically determined by monitoring the voltage of the power line 14.

[0117] Although not specifically mentioned in the above disclosure, whether or not a malfunction has occurred in power system 12B due to the interconnection of MG 100 may be automatically determined by monitoring the voltage of power system 12B.

[0118] Although not specifically mentioned in the above disclosure, a program may be provided that causes a computer to execute each process performed by the MG_EMS 150, the management server 200, or the MG server 300. The program may also be recorded in a computer-readable medium. Using the computer-readable medium, it is possible to install the program in the computer. Here, the computer-readable medium on which the program is recorded may be a non-transient recording medium. The non-transient recording medium is not particularly limited, and may be, for example, a recording medium such as a CD-ROM or a DVD-ROM.

[0119] Alternatively, a chip may be provided that is configured by a memory that stores a program for executing each process performed by the MG_EMS 150, the management server 200, or the MG server 300, and a processor that executes the program stored in the memory.

[0120] [Note] The above disclosure may be expressed as follows:

[0121] A first feature of the present invention is that the distributed power source control system includes a distributed power source connected to each of two or more regional independent systems that exist in an area partitioned by an area switch controlled by a management server that manages the power system, and a power source control device that controls the distributed power sources, wherein when the area is disconnected by the area switch, the power source control device executes a first procedure of checking whether or not a malfunction has occurred in each of the two or more regional independent systems, and executes a second procedure of performing independent operation of a regional independent system that is not experiencing the malfunction, without performing independent operation of the regional independent system in which the malfunction has occurred.

[0122] A second feature is that in the first feature, the power supply control device executes the first procedure in a state in which each of the two or more regional independent systems is disconnected from the power system.

[0123] A third feature is a distributed power supply control system in accordance with the second feature, which connects a target regional independent system, which is at least one of the two or more regional independent systems, to the power system when no malfunction occurs due to the connection of the target regional independent system.

[0124] A fourth feature is a distributed power supply control system according to the first feature, wherein the power supply control device executes the first procedure while each of the two or more regional independent systems is connected to the power system, and the first procedure includes a step of disconnecting a target regional independent system, which is at least one of the two or more regional independent systems, from the power system when a malfunction occurs due to the connection of the target regional independent system.

[0125] A fifth feature is that in the fourth feature, the power supply control device is a distributed power supply control system that disconnects the regional independent system in which the malfunction is occurring from the power system, starting from the side closest to the area switch.

[0126] A sixth feature is the distributed power supply control system according to at least one of the first to fifth features, wherein the power supply control device transmits a result of the first procedure to the management server.

[0127] A seventh feature is a distributed power supply control system in at least one of the first to fifth features, wherein the power supply control device executes the second procedure when permitted by the management server.

[0128] An eighth feature is a power supply control device that controls distributed power sources connected to each of two or more regional independent systems that exist in an area partitioned by an area switch controlled by a management server that manages the power system, and when the area is disconnected by the area switch, the power supply control device includes a control unit that executes a first procedure to check whether or not a malfunction has occurred in each of the two or more regional independent systems, and the control unit executes a second procedure to perform independent operation of a regional independent system that is not experiencing the malfunction, without performing independent operation of the regional independent system in which the malfunction has occurred.

[0129] A ninth feature is a distributed power source control method comprising: a power source control device that controls distributed power sources connected to each of two or more regional independent systems in an area partitioned by an area switch controlled by a management server that manages the power system, and when the area is disconnected by the area switch, a step A of executing a first procedure of checking whether or not a malfunction has occurred in each of the two or more regional independent systems, and a step B of executing a second procedure in which the power source control device performs independent operation of a regional independent system that is not experiencing the malfunction, without performing independent operation of the regional independent system in which the malfunction has occurred. [Explanation of symbols]

[0130] 1... Distributed power supply control system, 10... Substation, 12... Power system, 13... Area switch, 100... MG, 110... Distributed power supply, 111... Power supply, 112... PCS, 121... Switch, 130... Load, 131... Switch, 150... MG_EMS, 151... Communication unit, 152... Management unit, 153... Control unit, 191... Section switch, 192... TTS, 200... Management server, 300... MG server, 310... Communication unit, 320... Management unit, 330... Control unit

Claims

1. A distributed power source connected to each of two or more regional independent grids existing in an area partitioned by an area switch controlled by a management server that manages the power grid; a power supply control device that controls the distributed power supply, The power supply control device includes: When the area is disconnected by the area switch, a first step is performed to confirm whether or not a malfunction occurs in each of the two or more regional independent systems; a second procedure for performing independent operation of a regional independent system in which the malfunction is not occurring, without performing independent operation of the regional independent system in which the malfunction is occurring, said distributed power source control system.

2. 2 . The distributed power supply control system according to claim 1 , wherein the power supply control device executes the first step in a state in which each of the two or more regional independent power systems is disconnected from the power system.

3. 3. The distributed power supply control system according to claim 2, wherein the power supply control device connects a target area independent system, which is at least one of the two or more regional independent systems, to the power system when no malfunction occurs due to the connection of the target area independent system.

4. The power supply control device executes the first step in a state in which each of the two or more regional independent systems is connected to the power system, 2. The distributed power supply control system according to claim 1, wherein the power supply control device disconnects a target area independent system, which is at least one of the two or more regional independent systems, from the power system when a malfunction occurs due to the interconnection of the target area independent system.

5. 5. The distributed power supply control system according to claim 4, wherein the power supply control device disconnects the regional independent system in which the malfunction is occurring from the power system in order from the side closest to the area switch.

6. The distributed power supply control system according to claim 1 , wherein the power supply control device transmits a result of the first step to the management server.

7. 2. The distributed power supply control system according to claim 1, wherein the power supply control device executes the second procedure when permitted by the management server.

8. A power supply control device that controls distributed power supplies connected to each of two or more regional independent power systems present in an area partitioned by an area switch controlled by a management server that manages a power system, a control unit that executes a first procedure for confirming whether or not a malfunction occurs in each of the two or more regional independent systems when the area is disconnected by the area switch; The control unit executes a second procedure of performing independent operation of an area independent system not having the malfunction, without performing independent operation of the area independent system having the malfunction.

9. A power supply control device controls distributed power sources connected to two or more regional independent systems in an area partitioned by an area switch controlled by a management server that manages a power system, and when the area is disconnected by the area switch, executes a first procedure of checking whether or not a malfunction has occurred in each of the two or more regional independent systems; A distributed power supply control method comprising: a step B in which the power supply control device executes a second procedure in which the power supply control device performs independent operation of a regional independent system in which the malfunction is not occurring, without performing independent operation of the regional independent system in which the malfunction is occurring.

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