Multiple distributed power output integration and switching control system, output integration and switching control method, aggregation device and program

Abstract

When supplying multiple distributed power sources to a demand point, connecting them to a common bus without considering the voltage, frequency, phase, connection status, or abnormal condition of each distributed power source may result in inrush current, voltage fluctuations, frequency fluctuations, protective shutdowns, or supply interruptions. [Solution] The multiple distributed power output integration and switching control system 10 comprises input ports 110A, 110B, 110C, and 110D to which multiple distributed power supplies 200A, 200B, 200C, and 200D are connected, input-side switches 120A, 120B, 120C, and 120D, a common bus 140, and an output port 160. A power status acquisition unit 181 acquires status information for each distributed power supply, and a connection suitability determination unit 182 determines whether it is possible to connect to the common bus 140. A synchronization and pre-adjustment unit 183 adjusts the voltage, frequency, or phase before connection, and a connection control unit 184 closes the input-side switches. A switching control unit 188 switches the output in stages when some power supplies fail or disconnect.

Description

Technical Field

[0001] The present invention relates to power supply control using a plurality of distributed power sources. In particular, the present invention relates to a plurality of distributed power sources such as electric vehicles, plug-in hybrid vehicles, portable batteries, generator-equipped vehicles, fuel cell vehicles, power trailers, stationary batteries, and others, which are electrically aggregated via a common bus or an aggregation device, and a plurality of distributed power source output integration and switching control systems, output integration and switching control methods, aggregation devices, and programs that supply an integrated output to a demand point or a priority load.

[0002] More specifically, for each of the plurality of distributed power sources, the present invention acquires at least one of voltage, current, frequency, phase, remaining power amount, available output, connection state, switch state, insulation state, presence or absence of abnormality, and response performance, determines whether the plurality of distributed power sources can be connected to a common bus, sequentially or synchronously connects distributed power sources that satisfy the connection conditions, assigns an output command value to each distributed power source, and supplies an integrated output to a demand point.

[0003] Furthermore, when a decrease in the output of some distributed power sources, a decrease in the remaining power amount, an abnormality, a planned disconnection, or a connection release is detected during supply, the present invention gradually reduces the output of the distributed power source, increases the output of other distributed power sources or alternative distributed power sources, and switches the supply configuration while maintaining the voltage, frequency, or supplied power of the common bus or the output on the demand point side within a predetermined range.

Background Art

[0004] During disasters, power outages, power supply shortages, or emergency power supply, it is required to supply power to demand points such as shelters, medical institutions, communication base stations, administrative bases, water supply facilities, logistics bases, factories, and collective housing common facilities using a plurality of distributed power sources.

[0005] Such distributed power sources include electric vehicles, plug-in hybrid vehicles, portable batteries, generator-equipped vehicles, fuel cell vehicles, power trailers, and stationary batteries. These distributed power sources may differ from one another in terms of power capacity, output characteristics, connection method, response speed, residual energy, power conversion method, connection points, and operating time.

[0006] Simply placing multiple distributed power sources at demand points may result in mismatched voltage, frequency, phase, or output of each distributed power source, potentially leading to overcurrent, reverse power flow, voltage fluctuations, frequency fluctuations, phase shifts, inrush currents, or malfunctions of protective devices when connected to a common bus.

[0007] Furthermore, even if the required output is met by multiple distributed power sources at the start of supply, if the residual power of some distributed power sources decreases during supply, the fuel in the generators decreases, electric vehicles are disconnected, or some power sources malfunction, the power supplied to the demand point may drop sharply, and the power supply to priority loads may become unstable.

[0008] Furthermore, when disconnecting a distributed power source, suddenly reducing the output of that distributed power source to zero or suddenly opening the switch may cause a voltage drop on the common busbar, momentary power interruption on the load side, abrupt load transfer to other distributed power sources, frequency fluctuations, transient response or protective shutdown of the power converter.

[0009] Therefore, when integrating multiple distributed power sources to supply power, it is necessary to have technology that not only selects a power source but also determines the suitability of each distributed power source for connection, synchronizes or pre-adjusts them to meet the connection conditions to a common busbar, dynamically determines the output share of each distributed power source, and maintains a stable integrated output by switching the output in stages in the event of abnormalities or subsidence. [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] Japanese Patent Publication No. 2009-033808 [Patent Document 2] Japanese Patent Publication No. 2013-027163 [Patent Document 3] Japanese Patent Publication No. 2023-107386 [Overview of the project] [Problems that the invention aims to solve]

[0011] The present invention has been made in view of the above circumstances, and aims to provide a multiple distributed power output integration and switching control technology that, when multiple distributed power sources are integrated and supplied to a demand point or priority load, can safely connect connectable distributed power sources to a common bus based on the electrical state, connection state, and supply capacity of each distributed power source, and stably supply integrated output.

[0012] Furthermore, the present invention aims to provide a multi-distributed power output integration and switching control technology that can suppress overcurrent, inrush current, voltage fluctuations, frequency fluctuations, or protective shutdowns by determining the suitability of connection based on voltage, frequency, phase, current, insulation state, reverse power flow, switch state, or protection state when connecting multiple distributed power sources to a common bus, and connecting only the distributed power sources that meet the connection conditions to the common bus.

[0013] Furthermore, the present invention aims to provide a multi-distributed power output integration and switching control technology that can maintain supply to demand points or priority loads by gradually reducing the output of a distributed power source while increasing the output of other distributed power sources or alternative distributed power sources when a decrease in residual power, output reduction, abnormality, communication interruption, scheduled disconnection, or disconnection occurs in some distributed power sources during supply.

[0014] Furthermore, the present invention aims to provide a power aggregation control technology that can stably perform power addition, power switching, power exclusion, and shutdown of non-priority loads by controlling the output of multiple distributed power sources as a single power group, while managing the output distribution, connection status, switch status, metered values, and abnormality status of each distributed power source. [Means for solving the problem]

[0015] According to one aspect of the present invention, a multiple distributed power output integration and switching control system for integrating the outputs of multiple distributed power sources and supplying them to a demand point comprises: multiple input ports to which each of the multiple distributed power sources is connected; multiple input-side switches provided corresponding to the multiple input ports; a common bus for aggregating the outputs of the multiple distributed power sources; output ports for outputting power from the common bus to a demand point or load side; and a power status acquisition unit for acquiring status information of the multiple distributed power sources.

[0016] The aforementioned multi-distributed power output integration and switching control system includes a connection suitability determination unit that determines whether or not a distributed power supply can be connected to the common bus based on the status information of each distributed power supply.

[0017] The status information may include at least one of the following: voltage, current, frequency, phase, residual power, available output, response time, connection status, switch status, insulation status, presence or absence of abnormalities, temperature, remaining fuel amount, charge level, communication status, and connection point identification information of the distributed power supply.

[0018] The connection suitability determination unit may determine that a distributed power supply can be connected to the common bus if the voltage of the distributed power supply is within the allowable voltage range, the frequency is within the allowable frequency range, the phase difference is within the allowable phase difference range, the current before connection is within the allowable current range, the insulation state is normal, and there is no abnormal information.

[0019] The aforementioned multi-distributed power output integration and switching control system includes a synchronization and pre-adjustment unit that performs synchronization control or pre-adjustment to bring the output voltage, frequency, or phase of a distributed power supply that has been determined to be connectable by the connection suitability determination unit closer to the target value of the common bus.

[0020] The aforementioned multi-distributed power output integration and switching control system includes a connection control unit that, after synchronization or pre-adjustment by the synchronization and pre-adjustment unit, closes the input-side switch corresponding to the distributed power and connects the distributed power to the common bus.

[0021] The multiple distributed power source output integration and switching control system includes an output sharing determination unit that determines an output command value or an output sharing ratio for each distributed power source based on the required output or required power amount for the demand point or priority load and the state information of the multiple distributed power sources connected to the common bus.

[0022] The output sharing determination unit may determine the output command value or the output sharing ratio for each distributed power source based on at least one of the available output, remaining power amount, response speed, operable time, temperature, presence or absence of abnormality, power source type, owner restriction conditions, and minimum remaining amount conditions of each distributed power source.

[0023] The multiple distributed power source output integration and switching control system includes an integrated output control unit that integrates the outputs from the multiple distributed power sources based on the output command value or the output sharing ratio and supplies the integrated output to the demand point or priority load.

[0024] The multiple distributed power source output integration and switching control system includes a supply monitoring unit that monitors at least one of the voltage, frequency, integrated output, load power, output of each distributed power source, remaining power amount of each distributed power source, and presence or absence of abnormality of the common bus during supply.

[0025] The multiple distributed power source output integration and switching control system includes a switching control unit that, when detecting a decrease in the output, remaining power amount, abnormality, communication interruption, planned disconnection, or connection release of one distributed power source during supply, gradually reduces the output of the distributed power source and increases the output of other distributed power sources or alternative distributed power sources to suppress the output fluctuation of the common bus or the output port within a predetermined range.

[0026] The switching control unit may open the input-side switch corresponding to the distributed power source after the measured output of the distributed power source to be output-reduced or disconnected becomes less than or equal to a predetermined threshold value, or after the output contribution rate of the distributed power source becomes less than or equal to a predetermined ratio.

[0027] Preferably, the common bus is a DC bus, the DC outputs or the DC outputs after conversion from the multiple distributed power sources are aggregated on the DC bus, and the AC output is supplied to the demand point from the DC bus via an inverter.

[0028] Preferably, the common bus is an AC bus, and the plurality of distributed power sources or power converters connected to each distributed power source supply output in synchronization with the voltage, frequency, and phase of the AC bus.

[0029] Preferably, the multiple distributed power output integration and switching control system includes a load control unit that identifies priority loads and non-priority loads among the multiple loads connected to the demand point, and stops or limits the supply to non-priority loads when it is predicted that the integrated output will not meet the required output or required power amount of the priority load.

[0030] Preferably, even if communication with the communication network is interrupted, the multiple distributed power output integration and switching control system continues local control for a predetermined time based on the most recent connection permission information, output sharing information, and protection setting information stored in the storage unit within the aggregation device.

[0031] The present invention can also be understood as an output integration and switching control method including the above-mentioned functions, a program for causing a computer to execute the method, and an aggregation device equipped with the above-mentioned functions. [Effects of the Invention]

[0032] According to the present invention, not only can multiple distributed power sources be simply selected or arranged, but the suitability of connecting each distributed power source to a common busbar can be determined based on its electrical state and connection status, and only distributed power sources that meet the connection conditions can be safely connected.

[0033] Furthermore, according to the present invention, overcurrent, inrush current, voltage fluctuations, frequency fluctuations, phase shifts, or protective shutdowns can be suppressed by synchronizing or pre-adjusting the voltage, frequency, or phase before connecting multiple distributed power sources to a common bus.

[0034] Furthermore, according to the present invention, the output distribution of each distributed power source can be determined based on the available output, remaining power, response speed, operating time, etc. of multiple distributed power sources, thereby enabling a stable supply of integrated output to demand points or priority loads.

[0035] Furthermore, according to the present invention, if a decrease in output, a decrease in remaining power, an anomaly, or planned disconnection occurs in some distributed power sources during supply, the output of those distributed power sources can be gradually reduced, and the output of other distributed power sources or alternative distributed power sources can be increased, thereby suppressing supply fluctuations or momentary interruptions to demand points.

[0036] Furthermore, according to the present invention, since the input-side switch can be opened after the measured output of the distributed power supply subject to output reduction or disconnection falls below a predetermined threshold, voltage fluctuations or sudden load transfer to other power supplies due to abrupt power disconnection during power supply can be suppressed. [Brief explanation of the drawing]

[0037] [Figure 1] This figure shows the overall configuration of a multiple distributed power output integrated switching control system according to one embodiment of the present invention. [Figure 2] This figure shows the internal configuration of an aggregation device according to one embodiment of the present invention. [Figure 3] This figure shows an example of the process for determining connection suitability and for synchronization or pre-adjustment. [Figure 4] This figure shows an example of the process for determining output distribution and integrated output control. [Figure 5] This figure shows an example of switching control during output reduction or disconnection. [Figure 6] This figure shows an example of a DC bus-type output integration configuration. [Figure 7] This figure shows an example of an output integration configuration for an AC bus type. [Figure 8] This figure shows an example of controlling priority and non-priority loads. [Figure 9] This flowchart shows the overall flow of a method for integrating and switching control multiple distributed power output systems. [Modes for carrying out the invention]

[0038] The embodiments for carrying out the present invention will be described below with reference to the drawings. The embodiments described below are illustrative examples to facilitate understanding of the present invention, and the present invention is not limited to these embodiments.

[0039] As shown in Figure 1, the multiple distributed power output integration and switching control system 10 according to this embodiment comprises an aggregation device 100, multiple distributed power sources 200A, 200B, 200C, and 200D, a demand point 300, a load group 310, and a communication network 400.

[0040] The distributed power sources 200A, 200B, 200C, and 200D may be electric vehicles, plug-in hybrid vehicles, portable batteries, generator-equipped vehicles, fuel cell vehicles, power trailers, stationary batteries, solar power generation equipment and batteries, or combinations thereof.

[0041] The demand point 300 may be an evacuation center, medical facility, communication base station, administrative center, logistics center, water supply facility, factory, shared facilities in apartment buildings, event venue, temporary facility, or any other location requiring power supply.

[0042] Load group 310 may include priority loads 311 and non-priority loads 312. Priority loads 311 may be medical equipment, communication equipment, water supply equipment, emergency lighting, servers, disaster response headquarters equipment, and other loads that should be given priority in supply. Non-priority loads 312 may be air conditioning, general lighting, entertainment equipment, charging terminals, and other loads that are permitted to be temporarily stopped or restricted.

[0043] The aggregation device 100 may include a plurality of input ports 110A, 110B, 110C, 110D, a plurality of input-side switches 120A, 120B, 120C, 120D, a plurality of input-side power conversion units 130A, 130B, 130C, 130D, a common bus 140, an output-side power conversion unit 150, an output port 160, a measurement unit 170, a control unit 180, and a storage unit 190.

[0044] Input ports 110A, 110B, 110C, and 110D are provided to correspond to each of the distributed power supplies 200A, 200B, 200C, and 200D. The input ports may be DC input ports, AC input ports, V2H connection ports, V2G connection ports, generator input ports, or battery input ports.

[0045] The input-side switches 120A, 120B, 120C, and 120D connect and disconnect each distributed power source to the common busbar 140. The input-side switches may be mechanical switches, semiconductor switches, contactors, relays, circuit breakers, or a combination thereof.

[0046] The input-side power conversion units 130A, 130B, 130C, and 130D convert the output of each distributed power source to a voltage, frequency, phase, or DC voltage that is compatible with the common bus 140. The input-side power conversion units may be DC / DC converters, AC / DC converters, DC / AC inverters, bidirectional converters, or a combination thereof.

[0047] The common bus 140 is a bus that aggregates the outputs of multiple distributed power sources. The common bus 140 may be a DC bus or an AC bus.

[0048] The output power conversion unit 150 converts the power aggregated on the common bus 140 into a predetermined voltage and frequency for supply to the demand point 300 or load group 310. The output port 160 is the output terminal for supplying power to the demand point 300 or load group 310.

[0049] The measurement unit 170 measures the voltage, current, power, frequency, phase, connection status, switch status, insulation status, and presence or absence of abnormalities for each input port. The measurement unit 170 may also measure the bus voltage, bus current, bus power, frequency, and phase of the common bus 140, the output power of the output port 160, and the load power and load fluctuations of the demand point 300.

[0050] The control unit 180 may include a power status acquisition unit 181, a connection suitability determination unit 182, a synchronization / pre-adjustment unit 183, a connection control unit 184, an output distribution determination unit 185, an integrated output control unit 186, a supply monitoring unit 187, a switching control unit 188, and a load control unit 189.

[0051] The power status acquisition unit 181 acquires status information for each distributed power supply 200A, 200B, 200C, and 200D. The status information may be acquired directly from each distributed power supply, via the communication network 400, or from the input-side power conversion unit or measurement unit 170.

[0052] The connection suitability determination unit 182 determines whether each distributed power supply can be connected to the common bus 140. For example, the connection suitability determination unit 182 determines that a distributed power supply can be connected if its output voltage is within the allowable voltage range, its frequency is within the allowable frequency range, its phase difference is within the allowable phase difference range, its insulation state is normal, there are no abnormal signals, and its pre-connection current is within a predetermined range.

[0053] The synchronization and pre-adjustment unit 183 controls the input-side power conversion unit for distributed power sources that have been determined to be connectable, bringing the output voltage, frequency, or phase of the distributed power source closer to the target value of the common bus 140. If the common bus 140 is a DC bus, the synchronization and pre-adjustment unit 183 brings the output or converted output of the distributed power source closer to the bus target voltage. If the common bus 140 is an AC bus, the synchronization and pre-adjustment unit 183 synchronizes the output voltage, frequency, and phase of the distributed power source to the AC bus.

[0054] The connection control unit 184 closes the corresponding input-side switch for distributed power supplies for which synchronization or pre-adjustment is complete and the connection conditions are met, and connects the distributed power supplies to the common bus 140. The connection control unit 184 may perform pre-charging, inrush current suppression, or current limiting before closing the input-side switch.

[0055] The output distribution determination unit 185 determines the output command value or output distribution ratio for each distributed power source based on the required output, required power amount, remaining supply time, priority, and load fluctuations for the demand point 300 or priority load 311.

[0056] The output distribution determination unit 185 may determine the output distribution of each distributed power source based on at least one of the following: the available output of each distributed power source, remaining power, response speed, operating time, temperature, presence or absence of abnormalities, power source type, owner restriction conditions, minimum remaining capacity conditions, and future planned withdrawal.

[0057] The integrated output control unit 186 transmits an output command to each distributed power source or each input-side power converter based on the output command value or output distribution ratio determined by the output distribution determination unit 185, and integrates the outputs of multiple distributed power sources to supply to the demand point 300 or priority load 311.

[0058] During supply, the supply monitoring unit 187 monitors the bus voltage, bus current, bus power, frequency, phase of the common bus 140, the output power of the output port 160, the output of each distributed power supply, residual energy, temperature, presence or absence of abnormalities, and the status of the switchgear.

[0059] The switching control unit 188, during supply, gradually reduces the output of one distributed power source and increases the output of other distributed power sources or alternative distributed power sources if the remaining power of one distributed power source falls below a predetermined threshold, if the output of that distributed power source drops by more than a predetermined value, if abnormal information is acquired, if a communication interruption occurs, or if the scheduled disconnection of that distributed power source is acquired.

[0060] The switching control unit 188 opens the corresponding input-side switch after the measured output of the distributed power supply to be reduced in output or disconnected falls below a predetermined threshold, or after the output contribution rate of the distributed power supply falls below a predetermined percentage. This suppresses voltage fluctuations on the common bus 140 or abrupt load transfer to other distributed power supplies that may occur due to the sudden disconnection of the distributed power supply.

[0061] The load control unit 189 stops or limits the supply to the non-priority load 312 and maintains the supply to the priority load 311 if it predicts that the integrated output will not meet the required output or power requirements of the priority load 311.

[0062] The memory unit 190 may store status information for each distributed power supply, connection suitability determination results, synchronization conditions, output distribution information, connection history, switching history, switch status, metering information, abnormal information, and integrated output performance.

[0063] The communication network 400 may include a mobile communication network, wireless LAN, mesh network, satellite communication, LPWA, wired communication network, or a combination thereof. The aggregation device 100 may communicate with distributed power sources, owner terminals, central control devices, demand point-side devices, or monitoring devices via the communication network 400.

[0064] If communication with the communication network 400 is interrupted, the aggregation device 100 may continue local control for a predetermined time based on the most recent connection permission information, output sharing information, and protection setting information stored in the storage unit 190.

[0065] In this embodiment, an example of supplying multiple distributed power sources to a demand point was described, but the present invention can be applied to various applications such as VPP during normal times, supply and demand adjustment, peak shaving, demand response, microgrids, temporary power supply, event power supply, construction site power supply, and power supply during disasters. [Examples]

[0066] The following describes embodiments of the present invention. In this embodiment, we will take as an example a case in which power is supplied to a priority load in a medical facility experiencing a power outage using multiple distributed power sources 200A, 200B, 200C, and 200D.

[0067] Priority load 311 for medical facilities includes medical equipment, communication equipment, and emergency lighting, with a total required output of 10 kW. Non-priority load 312 includes air conditioning equipment and general lighting, with a total required output of 6 kW.

[0068] Distributed power source 200A is an electric vehicle with a supply output of 3kW and a remaining energy capacity of 20kWh. Distributed power source 200B is a portable battery with a supply output of 4kW and a remaining energy capacity of 15kWh. Distributed power source 200C is a vehicle equipped with a generator with a supply output of 6kW. Distributed power source 200D is a power trailer with a supply output of 5kW.

[0069] The power status acquisition unit 181 of the aggregation device 100 acquires the voltage, current, connection status, remaining power, available output, and presence or absence of abnormalities for each distributed power supply 200A to 200D.

[0070] The connection suitability determination unit 182 checks the voltage, frequency, phase difference, insulation status, and presence of abnormalities for the distributed power supplies 200A, 200B, 200C, and 200D. The DC output of distributed power supplies 200A and 200B is adapted to the common DC bus 140 by the input-side power conversion units 130A and 130B. The AC output of distributed power supplies 200C and 200D is rectified or converted by the input-side power conversion units 130C and 130D to adapt to the common DC bus 140.

[0071] The synchronization and pre-adjustment unit 183 controls each input-side power conversion unit to bring the converted output closer to the target bus voltage of the common DC bus 140. When the connection conditions are met, the connection control unit 184 sequentially closes the input-side switches 120A, 120B, 120C, and 120D.

[0072] The output distribution determination unit 185 allocates, for example, 2kW to distributed power supply 200A, 3kW to distributed power supply 200B, 3kW to distributed power supply 200C, and 2kW to distributed power supply 200D, in order to meet the 10kW required for the priority load 311. The integrated output control unit 186 transmits output commands to each distributed power supply or input-side power conversion unit and supplies 10kW to the priority load 311 from the output port 160.

[0073] After the start of power supply, the power supply monitoring unit 187 monitors the bus voltage of the common bus 140, the output power of the output ports 160, the measured output of each distributed power supply, and the remaining power.

[0074] When the remaining power of distributed power supply 200A falls below a predetermined threshold, the switching control unit 188 gradually reduces the output of distributed power supply 200A from 2kW to 1kW, 0.5kW, and 0kW. At the same time, the switching control unit 188 increases the output of distributed power supply 200C or 200D to maintain the combined output of output port 160 at 10kW.

[0075] The switching control unit 188 opens the input-side switch 120A after confirming that the measured output of the distributed power supply 200A has fallen below a predetermined threshold. This prevents voltage drops on the common bus 140 and momentary interruptions to the priority load 311 even when the distributed power supply 200A is disconnected.

[0076] Furthermore, if an abnormality occurs in the distributed power supply 200C, the switching control unit 188 excludes the distributed power supply 200C as an abnormal power supply and increases the output of distributed power supplies 200B and 200D. If necessary, the connection control unit 184 connects the input port to which the alternative distributed power supply 200E has been newly connected to the common bus 140 after determining whether it is suitable for connection and performing synchronization processing.

[0077] In this case, if it is predicted that the integrated output will not meet the required output of the priority load 311, the load control unit 189 will stop or limit the supply to the non-priority load 312 and maintain the supply to the priority load 311.

[0078] In another embodiment, the common bus 140 is an AC bus. In this case, the synchronization and pre-adjustment unit 183 synchronizes the output voltage, frequency, and phase of each distributed power source or each input-side power converter to the AC bus, and then closes the corresponding input-side switch.

[0079] In yet another embodiment, even if the communication network 400 is interrupted, the aggregation device 100 continues local control for a predetermined time based on the most recent connection permission information, output sharing information, and protection setting information stored in the storage unit 190. After communication is restored, the aggregation device 100 may transmit supply history, switching history, switch status, and abnormal information to the central control unit. [Industrial applicability]

[0080] This invention can be widely used in fields that supply electricity to demand points using multiple distributed power sources.

[0081] In particular, the present invention can be used to supply power to evacuation centers, medical facilities, communication base stations, administrative offices, water supply facilities, logistics centers, public facilities, factories, shared facilities in apartment buildings, event venues, and temporary facilities during disasters or power outages.

[0082] Furthermore, the present invention can be used in the fields of V2H, V2B, V2G, microgrids, temporary power distribution, peak shaving, demand response, and VPP by combining electric vehicles, batteries, generator-equipped vehicles, fuel cell vehicles, power trailers, stationary batteries, etc.

[0083] Furthermore, since the present invention can integrally control the connection, synchronization, output sharing, integrated output, switching, and isolation in the event of an anomaly of multiple distributed power sources, it is useful for safe power aggregation and stable supply of distributed power sources. [Explanation of Symbols]

[0084] 10. Multiple Distributed Power Output Integration and Switching Control System 100 Aggregation device 110A, 110B, 110C, 110D input ports 120A, 120B, 120C, 120D Input-side switch 130A, 130B, 130C, 130D Input-side power conversion section 140 Common Bus Bar 150 Output power conversion section 160 output ports 170 Measurement Unit 180 Control Unit 181 Power Status Acquisition Unit 182 Connection suitability determination unit 183 Synchronization and Pre-Coordination Department 184 Connection Control Unit 185 Output distribution determination unit 186 Integrated Output Control Unit 187 Supply Monitoring Department 188 Switching Control Unit 189 Load Control Unit 190 Memory section 200A, 200B, 200C, 200D, 200E distributed power supply 300 demand points 310 load group 311 Priority load 312 Non-priority load 400 Communication Networks Vbus bus voltage Ptotal Integrated Output Preq Required Output Pi Output command values ​​for each distributed power supply SOC charge level or remaining power SW switch status ERR Anomaly Information

Claims

1. A multi-distributed power output integration and switching control system that integrates the outputs of multiple distributed power sources and supplies them to demand points, Equipped with a consolidation device, The aggregation device is Each of the aforementioned multiple distributed power supplies has multiple input ports to which it is connected, Multiple input-side switches provided corresponding to the multiple input ports, A common bus that aggregates the outputs of the aforementioned multiple distributed power sources, An output port that outputs power from the common bus to the demand point or load side, A power supply status acquisition unit acquires status information for each of the plurality of distributed power supplies, including at least one of voltage, current, frequency, phase, residual power, available output, connection status, switch status, insulation status, abnormality status, communication status, and connection point identification information. A connection suitability determination unit determines whether each distributed power supply can be connected to the common bus based on the status information, For distributed power supplies that the connection suitability determination unit has determined to be connectable, a synchronization / pre-adjustment unit performs synchronization or pre-adjustment to bring the output voltage, frequency, or phase of the distributed power supplies closer to the target value of the common bus, After the synchronization or pre-adjustment, a connection control unit closes the input-side switch corresponding to the distributed power supply and connects the distributed power supply to the common busbar, An output distribution determination unit that determines an output command value or output distribution ratio for each distributed power source based on the required output or power quantity for the demand point or priority load connected to the demand point, and the status information of a plurality of distributed power sources connected to the common busbar, An integrated output control unit that integrates the outputs from the multiple distributed power sources based on the output command value or output distribution ratio and supplies the integrated output to the demand point or the priority load, During supply, a supply monitoring unit monitors at least one of the following: the voltage, frequency, integrated output, load power of the common bus, the output of each distributed power supply, the remaining power of each distributed power supply, the presence or absence of abnormalities, and the switch status. A switching control unit, which, when detecting a decrease in output, decrease in remaining power, abnormality, or planned disconnection of one distributed power supply during supply, gradually reduces the output of the said distributed power supply while it is connected to the common bus, and increases the output of other distributed power supplies or alternative distributed power supplies, thereby suppressing the output fluctuations of the common bus or the output port within a predetermined range, Equipped with, A system for integrating and switching multiple distributed power output sources.

2. The connection suitability determination unit determines that a distributed power supply can be connected to the common bus if the voltage of the distributed power supply is within the allowable voltage range, the frequency is within the allowable frequency range, the phase difference is within the allowable phase difference range, the current before connection is within the allowable current range, the insulation state is normal, and there is no abnormal information, as described in claim 1, for the multiple distributed power supply output integration and switching control system.

3. The synchronization and pre-adjustment unit controls an input-side power conversion unit provided in correspondence with the distributed power supply before closing the input-side switch, thereby bringing the converted output of the distributed power supply closer to the target voltage, target frequency, or target phase of the common bus, as described in claim 1, for the integrated switching and switching control system for multiple distributed power supply outputs.

4. The connection control unit performs pre-charging, inrush current suppression, or current limiting before closing the input-side switch, as described in claim 1, for the integrated switching control system for multiple distributed power outputs according to claim 1.

5. The multiple distributed power output integration and switching control system according to claim 1, wherein the common bus is a DC bus, the DC outputs from the multiple distributed power sources or the converted DC outputs from input-side power conversion units provided corresponding to each distributed power source are aggregated on the DC bus, and AC outputs are supplied from the DC bus to the demand point via output-side power conversion units.

6. The multiple distributed power output integration and switching control system according to claim 1, wherein the common bus is an AC bus, and the multiple distributed power sources or power converters connected to each distributed power source supply outputs in synchronization with the voltage, frequency, and phase of the AC bus.

7. The output distribution determination unit determines the output command value or output distribution ratio for each distributed power source based on at least one of the following: the available output of each distributed power source, the remaining power, the response speed, the operating time, the temperature, the presence or absence of abnormalities, the power source type, the owner restriction conditions, and the minimum remaining power conditions, according to claim 1, a multiple distributed power source output integration and switching control system.

8. The multi-distributed power output integration and switching control system according to claim 1, wherein the switching control unit opens the input-side switch corresponding to the distributed power supply after the measured output of the distributed power supply subject to output reduction or disconnection falls below a predetermined threshold, or after the output contribution rate of the distributed power supply falls below a predetermined percentage.

9. The multiple distributed power output integration and switching control system according to claim 1, wherein the switching control unit gradually increases the output of other distributed power sources or alternative distributed power sources during a period in which the output of one distributed power source is gradually reduced.

10. The multiple distributed power output integration and switching control system according to claim 1, further comprising a load control unit that identifies priority loads and non-priority loads among a plurality of loads connected to the demand point, and stops or limits the supply to the non-priority loads when it is predicted that the integrated output will not meet the required output or required power amount of the priority load.

11. The aggregation device, in the event of a communication interruption with the communication network, continues local control for a predetermined time based on the most recent connection permission information, output sharing information, and protection setting information stored in the storage unit within the aggregation device, as described in claim 1, for the multiple distributed power output integration and switching control system.

12. The aggregation device includes a storage unit, The storage unit stores at least one of the following: status information for each distributed power supply, connection suitability determination result, synchronization conditions, output distribution information, connection history, switching history, switch status, metering information, abnormal information, and integrated output performance, as described in claim 1, for the integrated and switching control system for multiple distributed power supply outputs.

13. The distributed power source includes electric vehicles, plug-in hybrid vehicles, portable batteries, generator-equipped vehicles, fuel cell vehicles, power trailers, stationary batteries, combinations of solar power generation equipment and batteries, and at least one of these combinations, as described in claim 1, for the multiple distributed power source output integration and switching control system.

14. An output integration and switching control method for integrating the outputs of multiple distributed power sources and supplying them to demand points, The aggregation device acquires status information for each of the plurality of distributed power sources, including at least one of the following: voltage, current, frequency, phase, residual power, available output, connection status, switch status, insulation status, presence or absence of abnormalities, communication status, and connection point identification information. The aggregation device includes the step of determining whether each distributed power source can be connected to a common bus based on the status information, The aggregation device performs a step of synchronizing or pre-adjusting the output voltage, frequency, or phase of the distributed power supplies that have been determined to be connectable, bringing them closer to the target value of the common bus. The aggregation device, after synchronization or pre-adjustment, closes the input-side switch corresponding to the distributed power supply and connects the distributed power supply to the common busbar. The aggregation device includes the step of determining an output command value or output sharing ratio for each distributed power source based on the required output or amount of power for the demand point or priority load connected to the demand point and the status information of a plurality of distributed power sources connected to the common busbar, The aggregation device performs the steps of integrating the outputs from the multiple distributed power sources based on the output command value or output distribution ratio and supplying the integrated output to the demand point or the priority load, When the aggregation device detects a decrease in output, a decrease in remaining power, an abnormality, or a planned disconnection of one distributed power source during supply, while that distributed power source is connected to the common bus, it gradually reduces the output of that distributed power source and increases the output of other distributed power sources or alternative distributed power sources to keep the output fluctuations of the common bus or output port within a predetermined range. Output integration and switching control method including

15. A program for causing a computer to execute each step performed by the aggregation device in the output integration and switching control method described in claim 14.

16. A power consolidation device that integrates the outputs of multiple distributed power sources and supplies them to the point of demand, Each of the aforementioned multiple distributed power supplies has multiple input ports to which it is connected, Multiple input-side switches provided corresponding to the multiple input ports, A common bus that aggregates the outputs of the aforementioned multiple distributed power sources, An output port that outputs power from the common bus to the demand point or load side, A power supply status acquisition unit that acquires status information of the multiple distributed power supplies, A connection suitability determination unit that determines whether each distributed power source can be connected to the common busbar, A synchronization / pre-adjustment unit that performs synchronization or pre-adjustment for distributed power sources that have been determined to be connectable, A connection control unit that connects the distributed power supply to the common bus after synchronization or pre-adjustment, An output distribution determination unit that determines an output command value or output distribution ratio for each distributed power source based on the required output or power quantity for the demand point or priority load connected to the demand point, and the status information of a plurality of distributed power sources connected to the common busbar, An integrated output control unit that integrates the outputs from the multiple distributed power sources and supplies them to the demand point or the priority load, When a decrease in output, decrease in remaining power, abnormality, or planned disconnection of one distributed power source is detected during supply, a switching control unit, while that distributed power source is connected to the common busbar, gradually reduces the output of that distributed power source and increases the output of other distributed power sources or alternative distributed power sources. Equipped with, Aggregation device.

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