Distributed power network control system, distributed power network control method, node control device and program

Abstract

In a distributed power network that includes unresponsive nodes, the updated configuration based on the confirmed group of participating nodes, excluding the unresponsive nodes, is synchronized and reflected, suppressing inconsistent power supply based on the old configuration. [Solution] The central control unit 11 sends a response request information 30 to the power node 20 every supply control cycle 40, and based on the response information 31 received by the response deadline 41, it excludes the unresponding node 50 and determines the group of participating nodes 49. Furthermore, it generates an updated network configuration based on the group of participating nodes 49 and sends configuration update information 33 including a configuration version identifier 45, a synchronization time 42, and a supply control value. The node control unit 23 switches the supply control at the synchronization time 42.

Description

Technical Field

[0001] The present invention relates to a control technology for a distributed power network that uses a plurality of electric vehicles or a bidirectional charging / discharging device connected to the electric vehicles as distributed power sources during disasters or emergencies.

[0002] More specifically, it relates to a distributed power network control technology that performs response confirmation for each supply control cycle for a plurality of power nodes, excludes unresponsive nodes, reconstructs the network configuration and supply control values based on the remaining nodes, and synchronously reflects them on each node.

[0003] Furthermore, the present invention also relates to a technology for assigning supply approval information corresponding to the reconstructed network configuration to each node, controlling the energization start, continuation, and stop of each node based on the supply approval information, and recording the supply performance. [[ID=##]]

Background Art

[0004] In order to continuously supply power to shelters, medical facilities, communication facilities, water supply facilities, and other important loads during disasters, it has been considered to utilize a plurality of electric vehicles as mobile power sources.

[0005] In such a distributed power network, since the connection positions, remaining battery levels, outputable powers, connection states, and communication states of each electric vehicle can vary over time, the supply control of the entire network needs to be dynamically updated rather than having a fixed configuration.

[0006] However, when some of the plurality of power nodes become incommunicable, disconnect, or return late, if other nodes or returning nodes maintain the supply control based on the old configuration including the node, inconsistencies in supply power, overloads, inconsistencies in reverse power flow, or unnecessary system switching may occur.

[0007] In particular, if a node retaining output settings based on the old configuration recovers or reconnects after the network has been reconfigured by excluding unresponsive nodes, inconsistent power supply may occur to the reconfigured network.

[0008] Therefore, there is a need for technology that can perform response checks at each supply control cycle, quickly remove unresponsive nodes, generate an updated network configuration based on the remaining nodes, apply the updated configuration to each node in a synchronized manner, and, if necessary, manage the reconfigured supply authorization and supply performance records in an integrated manner. [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] The present invention has been made in view of the above problems, and aims to provide a distributed power network control technology that can suppress inconsistent power supply based on the old configuration by excluding unresponsive nodes based on response confirmation for each supply control cycle to determine the group of participating nodes, generating an updated network configuration based on the group of participating nodes, and synchronizing the update to each node.

[0010] Furthermore, the present invention aims to provide a distributed power network control technology that allows a node that has been excluded to rejoin only after its safety status has been confirmed.

[0011] Furthermore, the present invention aims to provide a distributed power network control technology that enables tracking of the actual supply status by controlling whether or not each node can be powered on based on supply authorization information corresponding to the reconfigured network configuration, and by recording supply performance records in association with this information. [Means for solving the problem]

[0012] According to one aspect of the present invention, a distributed power network control system for controlling a distributed power network having a plurality of power nodes including a plurality of electric vehicles or a plurality of bidirectional charging and discharging devices connected to said electric vehicles, comprising a central control unit and node control units provided at each of the power nodes.

[0013] The central control unit transmits response request information to the node control units for each supply control cycle, and based on the response information received by the response deadline corresponding to the supply control cycle, it excludes unresponsive nodes that do not respond by the response deadline and determines the group of participating nodes.

[0014] The central control unit generates an updated network configuration based on the group of participating nodes and transmits configuration update information, including a configuration version identifier, synchronization time, and supply control value for each participating node, to the node control units belonging to the group of participating nodes.

[0015] After receiving the configuration update information, the node control device switches to supply control based on the supply control value corresponding to the updated network configuration at the synchronization time.

[0016] Preferably, the central control unit transmits supply authorization information to each power node belonging to the group of participating nodes, in accordance with the updated network configuration, including at least a node identifier, the configuration version identifier, the effective start time, the effective end time, and the permissible output limit.

[0017] Preferably, the node control device starts or continues power supply only when it has confirmed that the supply authorization information corresponds to its own node and that the configuration identifier included in the supply authorization information is up-to-date and within its validity period.

[0018] Preferably, when a power node that was previously excluded as an unresponsive node rejoins, the central control unit receives safety status information from the power node, including at least a switch open state, zero output state, connection point identifier, and reference meter value, and then issues supply authorization information corresponding to that power node.

[0019] Preferably, the node control device generates a supply performance record including the supply start time, supply end time, supplied power amount, and the configuration identifier, and transmits it to the central control device, and the central control device stores the supply authorization information and the supply performance record in association.

[0020] Furthermore, the present invention can be understood as a distributed power network control method that performs each of the above functions, a program that performs each of the above functions, and a node control device equipped with each of the above functions. [Effects of the Invention]

[0021] According to the present invention, the response to the response request information is checked for each supply control cycle, unresponsive nodes that do not respond by the response deadline are excluded to determine the group of participating nodes, and an updated network configuration is generated based on the determined group of participating nodes. This suppresses the reflection of supply control values ​​based on the old configuration that included unresponsive nodes.

[0022] Furthermore, configuration update information, including a configuration version identifier indicating the updated network configuration, a synchronization time, and a supply control value for each participating node, is transmitted to the node control devices belonging to the group of participating nodes. Each node control device switches to supply control based on the supply control value at the synchronization time, thereby aligning the switching time between nodes and suppressing inconsistent power supply resulting from a mix of old and new configurations.

[0023] Furthermore, in a preferred embodiment, power supply is permitted only if it can be confirmed that the supply authorization information is compatible with the node itself, is the latest configuration version, and is within its validity period, thereby preventing continued power supply that does not conform to the reconfigured network configuration.

[0024] Furthermore, according to a preferred embodiment, by re - allowing a power supply node that has once been excluded to re - participate after confirming the safety status information, it is possible to suppress inconsistent supply during delayed recovery or re - connection.

[0025] Furthermore, according to a preferred embodiment, by associating and storing supply approval information and supply performance records, it is possible to track which power supply node supplied how much and when in which configuration version.

Brief Description of the Drawings

[0026] [Figure 1] Overall configuration diagram of a distributed power network control system. It shows a configuration in which a central control device 11 and a plurality of power supply nodes 20A to 20D are connected thereto via a communication network 12. Each power supply node 20 includes an electric vehicle 21, a bidirectional charge - discharge device 22, a node control device 23, a power conversion unit 24, a switch 25, a metering unit 26, a clock unit 27, and a storage unit 28, and supplies power to an important load facility 60. [Figure 2] Communication sequence diagram. With the vertical axis representing time and the horizontal axis representing the central control device 11, node 20A, node 20B, node 20C, it shows the transmission and reception order of M1 response request information 30, M2 response information 31, M3 exclusion notice information 32, M4 configuration update information 33, M5 synchronization time information 34, M6 synchronization completion information 35, M7 safety status information 36, M8 supply approval information 37, M9 supply start confirmation information 38, and M10 supply performance notice information 39. It depicts the flow in which node 20B is once excluded due to non - response and then re - participates after M7 is transmitted. [Figure 3] State transition diagram of the node control device. The states are S1 unapproved, S2 response waiting, S3 participation permitted, S4 power - on, S5 failure, S6 re - participation waiting, and the transition conditions are described as M1 reception, M4 / M5 reception, M8 verification success, failure, new version reception, M7 transmission, etc. [Figure 4]Flowchart for the central control unit. The procedure is as follows: Start of supply control cycle → M1 transmission → Waiting for M2 reception → Determination of response deadline → Exclusion of unresponding nodes → Confirmation of participating node group → Generation of updated network configuration → Generation of configuration version identifier 45 → Transmission of M3 / M4 / M5 → Transmission of M8 if necessary → Reception of M6 / M9 / M10 → Record update. [Figure 5] Node control device side flowchart. The procedure is as follows: M1 reception → response information 31 transmission → M4 / M5 reception → wait until synchronization time 42 → switch to update supply control → when M8 is received, self node determination, latest version determination, validity period determination, verification information determination → power start or stop → M9 transmission → actual record 46 generation → M10 transmission. [Figure 6] Data structure diagram of supply authorization information 37. The fields, from top to bottom, are node identifier, configuration identifier 45, effective start time 43, effective end time 44, permissible output limit, verification information, and, if necessary, connection point identifier. [Figure 7] Data structure diagram of supply performance record 46. The fields include node identifier, configuration identifier 45, supply start time, supply end time, supplied power amount, anomaly flag, and, if necessary, previous record reference information. [Figure 8] A time-related time chart. The horizontal axis represents time, and within one supply control cycle 40, the cycle start, response deadline 41, synchronization time 42, valid start time 43, and valid end time 44 are placed. The relationships Tvalid_start = Tsync(k) and Tvalid_end <= Tsync(k+1) are noted. [Modes for carrying out the invention]

[0027] The embodiments for carrying out the present invention will be described below with reference to Figures 1 to 8. The embodiments described below are provided to facilitate understanding of the present invention, and the present invention is not limited to these embodiments.

[0028] As shown in Figure 1, the distributed power network control system 10 according to this embodiment comprises a central control unit 11, a communication network 12, and a plurality of power nodes 20. The plurality of power nodes 20 are configured to supply power to evacuation centers, medical facilities, communication facilities, water supply facilities, administrative centers, and other load facilities 60.

[0029] Each power node 20 includes an electric vehicle 21 or a bidirectional charge / discharge device 22 connected to the electric vehicle 21, and further comprises a node control device 23, a power conversion unit 24, a switch 25, a metering unit 26, a clock unit 27, and a storage unit 28. The bidirectional charge / discharge device 22 and the node control device 23 may be configured as a single unit or as separate units.

[0030] The central control unit 11 has a communication function for communicating with each power node 20, a node management function for managing the status of each power node 20, a participation determination function for determining the group of participating nodes by excluding unresponsive nodes based on response information, a reconfiguration function for generating an updated network configuration based on the group of participating nodes, a control value calculation function for calculating supply control values ​​to be applied to each node, a synchronization control function for aligning the switching times of each node, and a record management function for managing supply authorization information or supply performance records.

[0031] The node control device 23 includes a communication unit, a verification unit, a switch control unit, a metering unit 26, a clock unit 27, a storage unit 28, and an arithmetic processing unit. The verification unit determines the consistency of various information received from the central control device 11, and the arithmetic processing unit controls the start, continuation, or cessation of power supply based on the determination result and the received information. The switch control unit opens or closes the switch 25 according to the control result.

[0032] In this configuration, the central control unit 11 checks the participation status of each power node 20 every supply control cycle 40 and updates the network configuration based on the results of the check. At least a response deadline 41 and a synchronization time 42 are set for the supply control cycle 40. The response deadline 41 is the deadline for determining whether or not a response has been made in that supply control cycle 40, and the synchronization time 42 is the time when each node switches to supply control based on the updated network configuration.

[0033] As shown in Figure 2, the central control unit 11 transmits response request information 30(M1) to each node control unit 23 at the start of each supply control cycle 40 or at a predetermined time thereafter. The response request information 30 may include at least cycle identification information, the currently applied configuration identifier, the request transmission time, and management information as needed.

[0034] When each node control device 23 receives the response request information 30, it transmits response information 31(M2), which includes the status of its own node, to the central control device 11. Preferably, the response information 31 includes at least the node identifier, connection status, available output, remaining power or SOC, connection point identifier, presence or absence of abnormalities, and response time.

[0035] Based on the response information 31 received by the response deadline 41, the central control unit 11 excludes power nodes 20 that do not return the response information 31 by the response deadline 41 as unresponding nodes 50, and determines the group of participating nodes 49 for the supply control cycle 40.

[0036] The central control unit 11 determines the group of participating nodes 49 from which the unresponsive node 50 has been excluded, and then generates an updated network configuration 48 based on the group of participating nodes 49. The updated network configuration 48 may include at least information identifying the group of participating nodes 49, supply control values ​​to be assigned to each participating node, load priority, load distribution, connection paths, and power supply conditions as needed.

[0037] The central control unit 11 generates a configuration version identifier 45 for identifying the updated network configuration 48. The configuration version identifier 45 is identification information for distinguishing the updated network configuration 48 that is valid in the supply control cycle 40 from other configurations, and may also be used in the supply authorization information and supply performance records described later.

[0038] The central control unit 11 transmits exclusion notification information 32 (M3), configuration update information 33 (M4), and synchronization time information 34 (M5) to each node control unit 23 belonging to the group of participating nodes 49. The configuration update information 33 includes at least a configuration version identifier 45, a supply control value applicable to the node, and connection conditions as necessary. The synchronization time information 34 includes the synchronization time 42, which is the time of switching to the updated network configuration 48. Note that M3, M4, and M5 may be transmitted as separate messages or integrated into a single message.

[0039] When each node control device 23 receives configuration update information 33 and synchronization time information 34, it temporarily stores them in the storage unit 28. When the time managed by the clock unit 27 reaches the synchronization time 42, it switches from supply control based on the old configuration to supply control based on the supply control value corresponding to the updated network configuration 48.

[0040] On the other hand, for nodes excluded as unresponsive nodes 50, or nodes that cannot receive the configuration update information 33 to be applied by the synchronization time 42, the node control device 23 may stop the power supply based on the old configuration by maintaining the switch 25 in the open state or transitioning it to the open state. This can suppress inconsistent power supply based on the old configuration, including unresponsive nodes 50.

[0041] Each node control device 23 may send synchronization completion information 35 (M6) to the central control device 11 after completing the synchronization switchover. Based on the synchronization completion information 35 from each node, the central control device 11 can monitor the switching status to the updated network configuration 48.

[0042] As shown in Figure 3, the state of the node control device 23 may be managed as, for example, an unauthorized state, a waiting response state, a permitted participation state, a powered-on state, an expired state, and a waiting re-participation state. The node control device 23 transitions between these states depending on the information received and its own state.

[0043] If an unresponsive node 50 or a node in an expired state rejoins, it is preferable that the node transmits safety status information 36 (M7) to the central control unit 11. The safety status information 36 may include at least a node identifier, the open state of the switch 25, a zero output state or zero current state, a connection point identifier, a reference meter value, residual power or SOC, and the transmission time.

[0044] The central control unit 11 receives safety status information 36 and, after confirming that at least the node is in a safe state, includes the node as a candidate for participating node in the next supply control cycle 40. This avoids unconditionally powering on delayed recovery nodes or reconnection nodes.

[0045] Preferably, the central control unit 11 transmits supply authorization information 37(M8) to each participating node in accordance with the updated network configuration 48. The supply authorization information 37 includes at least a node identifier, a configuration version identifier 45, an effective start time 43, an effective end time 44, and an allowable output limit. In addition, a connection point identifier and verification information may be included as needed.

[0046] The supply authorization information 37 may be stored or transmitted as data having a structure that is processed by the node control device 23. Based on the supply authorization information 37, the node control device 23 uses the communication unit, clock unit 27, verification unit, and switch control unit to control the start, continuation, and stop of the power supply to the node.

[0047] The node control device 23 checks, at a minimum, whether the received supply authorization information 37 corresponds to its own node, whether the configuration identifier 45 is up-to-date, and whether the time on the clock unit 27 is at or above the effective start time 43 and at or below the effective end time 44. If verification information is attached, it also checks its integrity or authenticity.

[0048] The node control device 23 closes or maintains the closed state of the switch 25 to start or continue power supply only when the above conditions are met. On the other hand, if the effective termination time 44 has elapsed, if configuration update information 33 or supply authorization information 37 including a new configuration version identifier 45 is received, if an expiration instruction is received, or if any of the above conditions are not met, the switch 25 is opened and power supply based on the old configuration is stopped.

[0049] The effective start time 43 of the supply authorization information 37 may be set to coincide with the synchronization time 42, and the effective end time 44 may be set before the next synchronization time. For example, if the synchronization time in the kth supply control cycle is Tsync(k), the effective start time 43 can be set to Tsync(k) and the effective end time 44 can be set to Tsync(k+1) or earlier.

[0050] The node control device 23 may transmit supply start confirmation information 38(M9) to the central control device 11 when it actually starts supplying. The supply start confirmation information 38 may include the node identifier, the configuration identifier 45, the supply start time, and the closed state of the switch 25.

[0051] Furthermore, the node control device 23 may generate a supply performance record 46 including the supply start time, supply end time, supplied power amount, and configuration identifier 45 acquired by the metering unit 26, and transmit it to the central control device 11 as supply performance notification information 39 (M10). The supply performance record 46 may include an abnormality flag or previous record reference information as needed.

[0052] The central control unit 11 associates the supply authorization information 37 transmitted to each node with the supply performance records 46 received from that node and stores them in the authorization performance table 47. Furthermore, the central control unit 11 monitors the difference between the feeder metering value and the sum of the supply performance records 46, and if the difference exceeds a predetermined threshold, it may invalidate the supply authorization information 37 for the relevant node and generate a new configuration identifier 45 to perform a reconfiguration process.

[0053] The processes shown in Figures 4 and 5 may be implemented by each processor of the central control unit 11 and the node control unit 23 executing a program stored in their respective memory units. That is, the present invention may be implemented as a program that performs the following actions: sending response request information 30, receiving response information 31, excluding unresponding nodes 50, determining the participating node group 49, generating the updated network configuration 48, sending configuration update information 33, switching supply control at the synchronization time 42, verifying supply authorization information 37, and generating or recording the supply performance record 46.

[0054] The communication network 12 may include a mobile communication network, wireless LAN, mesh network, LPWA, satellite communication, or wired communication network, and these may be used individually or in combination. The central control unit 11 may be configured as a single server device, or its functions may be distributed across multiple servers or edge devices.

[0055] Furthermore, each power node 20 is not limited to an electric vehicle 21, but may also include a portable battery, a mobile unit with a generator, or other distributed power supply devices. In short, the present invention is characterized by excluding unresponsive nodes based on response confirmation for each supply control cycle, generating an updated network configuration based on the group of participating nodes from which the unresponsive nodes have been excluded, and reflecting the updated network configuration to each node at the synchronization time. [Examples]

[0056] As shown in Figure 1, the distributed power network control system 10 comprises a central control unit 11, a communication network 12, and a plurality of power nodes 20. Each power node 20 may include an electric vehicle 21, a bidirectional charge / discharge device 22, a node control device 23, a power conversion unit 24, a switch 25, a metering unit 26, a clock unit 27, and a storage unit 28.

[0057] Each power node 20 is connected to shelters, medical facilities, communication facilities, water supply facilities, and other critical load equipment 60. The electric vehicle 21, the bidirectional charge / discharge device 22, and the node control device 23 may be configured as an integrated device, and some functions may be distributed to the cloud or local control devices.

[0058] The central control unit 11 has communication functions, node management functions, response determination functions, reconfiguration functions, supply control value calculation functions, synchronization control functions, supply authorization issuance functions, and performance management functions. These functions may be consolidated into a single device or distributed across multiple devices.

[0059] The node control device 23 includes a communication unit, a verification unit, a switch control unit, a metering unit 26, a clock unit 27, a storage unit 28, and an arithmetic processing unit. The verification unit verifies various information received from the main control device 11 and determines whether or not power can be supplied. The switch control unit opens or closes the switch 25 according to the determination result.

[0060] In this embodiment, the supply control cycle 40 is executed repeatedly. For example, the supply control cycle 40 is set to 5 seconds, the response deadline 41 is set to 1 second after the start of the cycle, and the synchronization time 42 is set to 3 seconds after the start of the cycle. When supply authorization information is used, its effective start time 43 may be set to coincide with the synchronization time 42, and its effective end time 44 may be set before the next synchronization time.

[0061] As shown in Figure 2, the central control unit 11 transmits response request information 30 (M1) to each node control unit 23 at the start of the supply control cycle 40. The response request information 30 may include a cycle identifier, the current configuration identifier, the request transmission time, and other necessary management information.

[0062] When each node control device 23 receives the response request information 30, it sends response information 31(M2) back to the central control device 11. The response information 31 includes at least the node identifier, connection status, remaining power or SOC, available output, connection point identifier, presence or absence of abnormality, and response time.

[0063] Based on the response information 31 received by the response deadline 41, the central control unit 11 excludes nodes that did not receive response information 31 by the response deadline 41 as unresponding nodes 50, and determines the group of participating nodes 49.

[0064] The central control unit 11 calculates the updated network configuration based on the group of participating nodes 49 and generates a new configuration identifier 45. The updated network configuration may include the configuration of the group of participating nodes 49, the supply control values ​​for each node, the supply allocation to the load equipment 60, and, if necessary, connection routes or load priorities.

[0065] The central control unit 11 transmits exclusion notification information 32 (M3), configuration update information 33 (M4), and synchronization time information 34 (M5) to the node control units 23 belonging to the participating node group 49. Note that M3, M4, and M5 may be in separate messages, or they may be transmitted as multiple fields within a single message.

[0066] The configuration update information 33 includes at least a configuration version identifier 45, information identifying the group of participating nodes 49, a supply control value applicable to the node, and optionally a connection point identifier and activation conditions.

[0067] Each node control device 23 temporarily stores the received configuration update information 33 and switches from supply control based on the old configuration to supply control based on the updated configuration at the synchronization time 42. After that, it may transmit synchronization completion information 35 (M6) to the central control device 11.

[0068] As a result, the updated configuration based on the group of participating nodes 49, from which the unresponsive node 50 has been excluded, is reflected on all participating nodes at the same time, thus suppressing inconsistent supply caused by the old configuration including the unresponsive node 50.

[0069] In Figure 2, if node 20B does not respond by the response deadline 41 during a certain supply control cycle 40, the central control device 11 removes node 20B from the group of participating nodes 49 as an unresponsive node 50, and generates an updated configuration with the remaining nodes 20A, 20C, and 20D.

[0070] Subsequently, if node 20B recovers communication or reconnects, it does not immediately permit power to be supplied, but first transmits safety status information 36(M7) to the central control unit 11. The safety status information 36 includes at least the node identifier, the open state of the switch 25, the zero output state or zero current state, the connection point identifier, the reference meter value, the remaining power or SOC, and the transmission time.

[0071] The central control unit 11 checks the safety status information 36 and, only if it determines that rejoining is possible, adds node 20B to the list of new candidate participating nodes and, if necessary, recalculates the updated network configuration in the next supply control cycle 40.

[0072] In this embodiment, each node after reconfiguration may be assigned supply authorization information 37(M8). The supply authorization information 37 includes at least a node identifier, a configuration identifier 45, an effective start time 43, an effective end time 44, an allowable output limit, and optionally a connection point identifier and verification information.

[0073] The supply authorization information 37 may be transmitted together with the configuration update information 33 or the synchronization time information 34, or it may be transmitted in a separate message. Furthermore, the supply authorization information 37 may be stored or transmitted as data having a structure that is processed by the node control device 23.

[0074] The node control device 23 checks, at a minimum, whether the received supply authorization information 37 corresponds to its own node, whether the configuration identifier 45 is up-to-date, and whether the time on the clock unit 27 is at or above the effective start time 43 and at or below the effective end time 44. If verification information is attached, it also checks its consistency.

[0075] The node control device 23 closes the switch 25 and starts or continues power supply only when the above conditions are met. If any of the conditions are not met, or if information containing a new configuration identifier 45 is received, or if an expiration instruction is received, the power supply based on the old configuration is stopped.

[0076] The node control device 23 may transmit supply start confirmation information 38(M9) to the central control device 11 when it actually starts supplying. The supply start confirmation information 38 includes the node identifier, configuration identifier 45, supply start time, switch closed status, and other necessary information.

[0077] The node control device 23 generates a supply performance record 46 including the supply start time, supply end time, supplied power amount, configuration identifier 45, and whether or not there is an abnormality, and transmits it to the central control device 11 as supply performance notification information 39 (M10).

[0078] The central control unit 11 associates the supply authorization information 37 transmitted to each node with the supply performance records 46 received from those nodes and stores them in the authorization performance table 47. If necessary, the supply performance records 46 may include previous record reference information and be recorded in a chain.

[0079] The central control unit 11 may, if necessary, monitor the difference between the feeder meter reading and the sum of the supply performance records 46 of each node. If the difference exceeds a threshold, it may invalidate the supply authorization information 37 of the relevant node, issue a new configuration identifier 45, and perform a reconfiguration process.

[0080] Verification information may consist of digital signatures, message authentication codes, hash values, challenge-response information, and other verification information.

[0081] The connection point identifier may be associated with a connection point determined by another placement and guidance system, and the node control device 23 may permit power supply only if the actual connection point matches the connection point identifier included in the supply authorization information 37.

[0082] Each of the above functions may be implemented by the processor executing a program stored in memory. In other words, the present invention may be implemented as a program that causes the central control unit 11 or the node control unit 23 to execute each process. [Industrial applicability]

[0083] This invention can be applied to a distributed power network in which multiple electric vehicles or bidirectional charging / discharging devices are operated as distributed power sources in disaster shelters, medical facilities, communication facilities, public facilities, factories, logistics centers, temporary power supply bases, and other locations.

[0084] Furthermore, the present invention can be applied to peak shaving during normal operation, microgrid control, coordinated power supply of mobile battery groups, temporary power networks, and temporary power supply systems for remote islands or mountainous areas. [Explanation of Symbols]

[0085] 10. Distributed Power Network Control System 11. Control System 12 Communication Networks 20 power nodes 21 Electric Vehicles 22 Bidirectional charging / discharging device 23 Node Control Unit 24 Power Conversion Unit 25 Switch 26 Measuring section 27 Clock Department 28 Memory section 30 Response Request Information (M1) 31 Response Information (M2) 32 Exclusion notification information (M3) 33 Configuration update information (M4) 34 Synchronized time information (M5) 35. Synchronization complete information (M6) 36. Safety Status Information (M7) 37 Supply authorization information (M8) 38. Supply Start Confirmation Information (M9) 39. Supply Performance Notification Information (M10) 40 Supply control cycle 41 Response deadline 42 Synchronization time 43 Effective start time 44. Effective end time 45. Configuration Identifier 46 Supply Performance Records 47 Approval Record Table 49 Participating Nodes 50 unresponsive nodes 60 Important load equipment

Claims

1. A distributed power network control system for controlling a distributed power network having multiple power nodes, including multiple electric vehicles or bidirectional charge / discharge devices connected to said electric vehicles, Integrated control system, A node control device is provided at each of the aforementioned power supply nodes, Equipped with, The central control unit transmits response request information to the node control units for each supply control cycle, and based on the response information received by the response deadline corresponding to the supply control cycle, it excludes unresponsive nodes that do not respond by the response deadline to determine the group of participating nodes, generates an updated network configuration based on the group of participating nodes, and transmits configuration update information, including a configuration version identifier, synchronization time, and supply control value for each participating node, to the node control units belonging to the group of participating nodes. After receiving the configuration update information, the node control device switches to supply control based on the supply control value corresponding to the updated network configuration at the synchronization time. Distributed power network control system.

2. The distributed power network control system according to claim 1, wherein the response information includes at least a node identifier, available output, remaining power or SOC, connection point identifier, presence or absence of abnormality, and response time.

3. The distributed power network control system according to claim 1 or 2, wherein the response deadline is set after the start of the supply control cycle and before the synchronization time.

4. The distributed power network control system according to claim 1, wherein the central control device recalculates the total supply amount to the group of participating nodes that has been determined by excluding the unresponsive nodes, or the allocated output to each participating node, and includes the recalculation result in the configuration update information.

5. The distributed power network control system according to claim 1, wherein the central control device transmits supply authorization information to each power node belonging to the group of participating nodes, in accordance with the updated network configuration, including at least a node identifier, the configuration version identifier, the effective start time, the effective end time, the permissible output limit, and verification information.

6. The central control unit transmits supply authorization information to each power node belonging to the group of participating nodes, in accordance with the updated network configuration, including at least a node identifier, the configuration version identifier, the effective start time, the effective end time, the permissible output limit, and verification information. The distributed power supply network control system according to claim 1, wherein the node control device starts or continues power supply only when it can confirm that the supply authorization information corresponds to its own node, that the configuration version identifier included in the supply authorization information is the latest configuration version identifier corresponding to the updated network configuration, and that it is within a period from the effective start time to the effective end time.

7. The distributed power network control system according to claim 1, wherein when a power node that has been excluded as an unresponsive node rejoins, the central control unit issues supply authorization information corresponding to the power node after receiving safety status information from the power node, including at least a switch open state, a zero output state, a connection point identifier, and a reference meter value.

8. The central control unit transmits supply authorization information to each power node belonging to the group of participating nodes, in accordance with the updated network configuration, including at least a node identifier, the configuration version identifier, the effective start time, the effective end time, the permissible output limit, and verification information. The node control device generates a supply performance record including the supply start time, supply end time, supplied power amount, and the configuration version identifier, and transmits it to the central control device. The distributed power network control system according to claim 1, wherein the central control device stores the supply authorization information and the supply performance record in association.

9. The central control unit transmits supply authorization information to each power node belonging to the group of participating nodes, in accordance with the updated network configuration, including at least a node identifier, the configuration version identifier, the effective start time, the effective end time, the permissible output limit, and verification information. The node control device generates a supply performance record including the supply start time, supply end time, supplied power amount, and the configuration version identifier, and transmits it to the central control device. The aforementioned integrated control device stores the supply authorization information and the supply performance record in association with each other. The distributed power network control system according to claim 1, wherein the central control device invalidates the supply authorization information for the relevant power node and generates a new configuration identifier when the difference between the feeder metering value and the sum of the supply performance records exceeds a predetermined threshold.

10. The central control unit transmits supply authorization information, including a connection point identifier, to each power node belonging to the group of participating nodes, in accordance with the updated network configuration. The distributed power network control system according to claim 1, wherein the node control device starts or continues power supply only when the actual connection point matches the connection point identifier.

11. A distributed power network control method executed by a central control unit and multiple node control units, The process includes the operation of the central control unit to send response request information to the node control unit for each supply control cycle, The node control device transmits response information to the response request information to the central control device, The aforementioned central control unit, based on the response information received by the response deadline, determines the group of participating nodes by excluding unresponding nodes that have not responded by the response deadline, The central control unit generates an updated network configuration based on the group of participating nodes, and transmits configuration update information, including a configuration version identifier, synchronization time, and supply control value for each participating node, to the node control units belonging to the group of participating nodes. The node control device, after receiving the configuration update information, switches to supply control based on the supply control value corresponding to the updated network configuration at the synchronization time, A distributed power network control method including

12. The above method further, The integrated control unit transmits supply authorization information to each power node belonging to the group of participating nodes, in accordance with the updated network configuration, including at least a node identifier, the configuration version identifier, the effective start time, the effective end time, and the permissible output limit. The node control device initiates or continues power supply only when it has confirmed that the supply authorization information corresponds to its own node, and that the configuration version identifier included in the supply authorization information is the latest configuration version identifier and is within its validity period. The node control device transmits a supply performance record including the supply start time, supply end time, supplied power amount, and the configuration identifier. The aforementioned integrated control device includes the step of storing the supply authorization information and the supply performance record in association with each other, A method for controlling a distributed power network according to claim 11, including the method described in claim 11.

13. A program for causing the computer of the central control unit to execute each step performed by the central control unit in the method according to claim 11 or 12.

14. A node control device installed at a power node connected to a distributed power network, Communications Department and, The clock section, Switch control unit and Memory unit and, Processor and Equipped with, The aforementioned processor, The system generates and transmits response information in response to the response request information received from the central control unit. The system stores the configuration version identifier, synchronization time, and supply control value assigned to its own node, which are included in the configuration update information received from the aforementioned central control unit. At the aforementioned synchronization time, the system switches to supply control based on the supply control value corresponding to the configuration update information. Node control device.

15. The aforementioned processor, Furthermore, upon receiving supply authorization information, and only if it is confirmed that the supply authorization information corresponds to its own node, that the configuration identifier included in the supply authorization information is the latest, and that the time on the clock unit is between the effective start time and the effective end time, the switch control unit starts or continues supplying power. When the aforementioned expiration time has elapsed, when information containing a new configuration identifier is received, or when an expiration instruction is received, the power supply is stopped. A supply performance record is generated and transmitted, including the supply start time, supply end time, supplied power amount, and the aforementioned configuration identifier. The node control device according to claim 14.

16. A program for causing the computer of a node control device to execute each step performed by the node control device in the method according to claim 11 or 12.

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