WO2011039608A1 - Réseau de distribution d'électricité - Google Patents

Réseau de distribution d'électricité Download PDF

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Publication number
WO2011039608A1
WO2011039608A1 PCT/IB2010/002459 IB2010002459W WO2011039608A1 WO 2011039608 A1 WO2011039608 A1 WO 2011039608A1 IB 2010002459 W IB2010002459 W IB 2010002459W WO 2011039608 A1 WO2011039608 A1 WO 2011039608A1
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WO
WIPO (PCT)
Prior art keywords
output
converter
voltage
output voltage
storage battery
Prior art date
Application number
PCT/IB2010/002459
Other languages
English (en)
Japanese (ja)
Inventor
卓也 香川
田村　秀樹
康弘 松田
Original Assignee
パナソニック電工株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニック電工株式会社 filed Critical パナソニック電工株式会社
Publication of WO2011039608A1 publication Critical patent/WO2011039608A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H02J1/102—Parallel operation of dc sources being switching converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/40—Synchronising a generator for connection to a network or to another generator
    • H02J3/44—Synchronising a generator for connection to a network or to another generator with means for ensuring correct phase sequence
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

Definitions

  • the present invention relates to a power distribution system that distributes DC power to load equipment based on power supplied from a plurality of power sources.
  • Patent Document 1 discloses a power distribution system that distributes AC power and DC power in a building such as a house, a store, or an office building.
  • This power distribution system is a commercial power source that is supplied from an electric power company by installing DC power generation equipment such as a solar power generation system in a building for in-house power generation, converting the direct power output of the DC power generation equipment into AC power.
  • DC power generation equipment such as a solar power generation system
  • This is a grid-connected system that performs grid-connected operation with the AC power system.
  • This type of grid-connected system is an AC power source by converting DC power generated by DC power generation equipment into AC power using a power converter (power conditioner) that converts DC power into AC power.
  • a power converter power conditioner
  • a configuration that works with commercial power is adopted.
  • power exceeding the power consumed by the load in the building is supplied from the DC power generation facility, it is possible to reverse the surplus power to the commercial power supply (so-called power sale). Yes.
  • Patent Document 1 Japanese Unexamined Patent Publication No. 2 0 0 3-2 8 4 2 4 5
  • Patent Document 2 Japanese Unexamined Patent Application Publication No. 2 0 0 9-1 5 9 6 9 0
  • a distribution system using multiple power sources such as a DC power generation facility such as a solar power generation device or a fuel cell power generation device, a commercial power supply, or a storage battery is assumed.
  • a DC power generation facility such as a solar power generation device or a fuel cell power generation device, a commercial power supply, or a storage battery
  • an output converter such as a DC-DC converter or an AC-DC converter is provided for each power source, and a configuration in which DC power of a predetermined voltage level is output from each output converter is common. It is.
  • the output voltage control of each output converter is performed individually. Therefore, when output converters are connected in parallel, it is not possible to know which output converter will output the desired power source. May not be output from the output converter.
  • the present invention has been made in view of the above circumstances.
  • a system that distributes DC power using a plurality of power sources, an output of a desired power source according to a preset order according to the state of each power source.
  • Distributing system capable of outputting DC power from converter for power supply.
  • the present invention provides a plurality of output converters that are provided corresponding to a plurality of power sources and that output DC power of a predetermined voltage level based on the power supplied from the connected power sources, and a plurality of output power sources.
  • An output voltage control unit that controls the output voltage of the converter, and a system control unit that gives an instruction value to the output voltage control unit to instruct an output voltage control operation
  • the output voltage control unit includes: A feedback control system in which a higher output voltage is set from a higher level so that the output voltage of each output comparator has a predetermined voltage difference between the converters according to the output priority order of a plurality of power sources determined in advance.
  • the system controller controls the output voltage of each output comparator with this set voltage as a target.
  • the system controller gives one output voltage command value to the output voltage controller.
  • Providing power distribution system is intended to vary in conjunction with the output voltages of the output converter.
  • the present invention is the above power distribution system, wherein the output voltage control unit includes an output voltage detection unit that detects each output voltage of the plurality of output converters, and the output voltage detection unit includes each output voltage Including a configuration in which a predetermined voltage difference is provided in the detection voltage for each converter.
  • the present invention includes the power distribution system described above, wherein the output voltage control unit includes a single integrated output voltage detection unit that detects the output voltages of the plurality of output converters.
  • the present invention is the power distribution system described above, wherein the output voltage detection unit includes a voltage dividing resistor, and a plurality of detection voltage differences set for each output converter by the voltage dividing resistor. Includes one that obtains the output voltage of the converter for output.
  • the present invention is the above power distribution system, wherein the output voltage control unit includes a reference voltage value based on an output voltage command value from the system control unit, and a plurality of output comparators by the output voltage detection unit. Including a comparator that compares the detected voltage value of the data and feeds back the comparison result to each output converter.
  • the present invention includes the power distribution system described above, wherein the output voltage control unit includes a voltage conversion unit that converts an output voltage command value from the system control unit into a reference voltage value.
  • the present invention is the above power distribution system, further comprising an output state detection unit that detects an output state of each power source and each output converter, and the system control unit outputs an output voltage command according to the state. Includes variable values.
  • the present invention is the above power distribution system, wherein the system control unit outputs the output voltage command value so that the output voltage of the output converter having the higher output priority is a predetermined set output voltage. This includes switching the output voltage command value so that the output voltage of the next-order output converter becomes the set output voltage when the output from the higher-order output converter cannot be obtained normally.
  • the present invention is the above power distribution system, wherein a plurality of output converters include a solar cell converter connected to a solar battery, a storage battery converter connected to the storage battery, and an AC connected to a commercial power source.
  • the output voltage control unit sets an output voltage with a predetermined voltage difference in the order of solar battery> commercial power supply> storage battery as the set voltage of the converter for multiple outputs. Includes those that control the output voltage of the converter.
  • the present invention is the above power distribution system, wherein the output unit of the storage battery converter includes a diode that separates the output voltage, and the output voltage control unit is an independent controller that controls the output voltage of the storage battery converter.
  • the present invention is the power distribution system described above, wherein the feedback control system independent of the output voltage control unit includes a reference voltage value based on an output voltage command value from the system control unit, and an output of the storage battery converter. It includes a comparator that compares the detected voltage value of the voltage and feeds back the comparison result to the storage battery converter.
  • the present invention includes the power distribution system described above, wherein the output unit of the independent feedback control system provided in the storage battery converter is connected to the storage battery comparator via the feedback output switching unit.
  • the present invention includes the power distribution system described above, wherein the system control unit monitors the input voltage and the output voltage of the storage battery converter.
  • the present invention is the above power distribution system, wherein the output part of the AC-DC converter is provided with a diode that separates the output voltage, and the output voltage control part is an independent controller that controls the output voltage of the AC-DC converter. Including a feedback control system that is set lower than the set voltage of other feedback control systems installed in the AC-DC converter.
  • the present invention is the above-described power distribution system, wherein the independent feedback control system of the output voltage control unit includes a reference voltage value based on an output voltage command value from the system control unit, and an output of the AC-DC converter. It includes a comparator that compares the detected voltage value of the voltage and feeds back the comparison result to the AC-DC converter.
  • the present invention provides the power distribution system as described above, wherein the output unit of the independent feedback control system provided in the AC-DC converter is connected to the AC-DC converter via the feedback output switching unit. Including those connected to the barter.
  • the present invention also includes the power distribution system described above, wherein the system control unit monitors the input voltage and output voltage of the AC-DC converter.
  • the present invention is the above power distribution system, wherein the output unit of the solar cell converter includes a diode that separates the output voltage, and the system control unit outputs the input voltage and the output voltage of the solar cell converter. Includes monitoring.
  • the present invention is the above power distribution system, wherein a plurality of output converters include a solar cell converter connected to a solar battery, a storage battery converter connected to the storage battery, and an AC connected to a commercial power source.
  • the output voltage control unit uses the set voltage of multiple output converters as a set voltage difference in the order of solar battery> storage battery energy saving operation> commercial power supply> storage battery backup operation. Including the one that sets the output voltage and controls the output voltage of each output converter.
  • the present invention is the above-described power distribution system, wherein the output voltage control unit includes an independent feedback control system for controlling the output voltage of the storage battery comparator, and a switching operation for ONZOFF the operation of the independent feedback control system. And a switch that controls the output voltage during energy-saving operation of the storage battery using an independent feedback control system.
  • the present invention is the above power distribution system, wherein the output unit of the storage battery converter includes a diode that separates the output voltage, and the output voltage control unit is an independent controller that controls the output voltage of the storage battery converter.
  • the feedback control system includes a first independent feedback control system on the diode side of the diode and a switching switch for turning on and off the operation of the first independent feedback control system, and a second switch on the anode side of the diode.
  • An independent feedback control system is provided, the output voltage during energy saving operation of the storage battery is controlled by the first independent feedback control system, and the set voltage of the second independent feedback control system is controlled by another feed / Including those set lower than the set voltage of the clock control system.
  • the present invention is the power distribution system described above, further including an output state detection unit that detects an output state of each power source and each output converter, and is connected to the solar cell as a plurality of output converters.
  • the system controller is equipped with a solar battery converter, a storage battery converter connected to the storage battery, and an AC-DC converter connected to the commercial power supply.
  • the system controller can store the storage battery during power outages when the commercial power is not supplied. When the amount is less than the predetermined value, the output from the converter for the storage battery is stopped, and the standby state where the power supply from the storage battery is received by itself is included.
  • the present invention is the power distribution system described above, wherein the system control unit continues the standby state from the time of power failure until power is restored until at least the output range of the converter for solar cells is reached. Including things.
  • the present invention is the above-described power distribution system, wherein at least one of the plurality of output converters having an output priority set higher is provided with a drooping output characteristic. Including those that are made up of equipped computers.
  • DC power is output from an output converter of a desired power source according to a preset order according to the state of each power source. It is possible to provide a power distribution system that can
  • FIG. 1 is a diagram showing a configuration of a power distribution system according to an embodiment of the present invention.
  • FIG. 2 is a diagram showing a main configuration of the power distribution system according to the present embodiment.
  • FIG. 3 is a flowchart showing an operation procedure of a control unit in the power distribution system of the present embodiment.
  • FIG. 4 is a diagram illustrating an example of a power source state and an output voltage setting in each state in the power distribution system of the present embodiment.
  • FIG. 5 is a diagram showing a first modified example of an output voltage control unit having another configuration of the output voltage detection unit in the present embodiment.
  • FIG. 6 is a diagram showing a second variation of the output voltage control unit in which the output voltage detection unit in the present embodiment has another configuration.
  • FIG. 7 is a diagram showing a third modification of the output voltage control unit in the present embodiment.
  • FIG. 8 is a diagram showing output characteristics of each power source in the present embodiment.
  • FIG. 9 is a diagram showing a main configuration of a power distribution system according to a second embodiment.
  • FIG. 10 is a diagram showing a main configuration of a power distribution system according to a third embodiment.
  • FIG. 11 is a diagram showing a main part configuration of a power distribution system according to a fourth embodiment.
  • FIG. 12 is a diagram showing a main part configuration of a power distribution system according to a fifth embodiment.
  • FIG. 13 is a diagram showing a main configuration of a power distribution system according to a sixth embodiment.
  • FIG. 14 is a diagram showing a configuration of main parts of a power distribution system according to a seventh embodiment.
  • FIG. 15 is a diagram showing a main configuration of a power distribution system according to an eighth embodiment.
  • FIG. 16 is a diagram showing a main configuration of a power distribution system according to a ninth embodiment.
  • a power distribution system according to the present invention is applied to a detached house
  • the building to which the power distribution system according to the present invention can be applied is not limited to a detached house, but can also be applied to each dwelling unit or office of an apartment house.
  • FIG. 1 is a diagram showing a configuration of a power distribution system according to an embodiment of the present invention.
  • Power distribution in this embodiment The system is a configuration example applied to a hybrid power distribution system that includes a solar battery and a storage battery and that can distribute AC power and DC power.
  • This distribution system distributes DC power to AC load distribution boards 1 0 4 that distribute AC power to AC load equipment via AC distribution paths 1 0 6 and DC load equipment via DC distribution paths 1 0 7.
  • a DC distribution board 110 constituting a DC distribution device.
  • the AC distribution board 1 0 4 is connected to a commercial power source (AC power system) 1 0 5 and a power conditioner 1 0 3 as an AC power source at the input end, and to an AC distribution line 1 0 6 and a DC at the output end Distribution board 1 1 0 is connected.
  • AC distribution board 1 0 4 branches AC power supplied from commercial power supply 1 0 5 or power conditioner 1 0 3 and outputs AC power to AC distribution path 1 0 6 and DC distribution board 1 1 0 To do.
  • a solar battery 10 1 and a storage battery 10 2 are provided as a DC power source of the power distribution system.
  • the solar cell 101 receives sunlight and photoelectrically converts it to generate electric power and outputs direct current power, and constitutes a solar power generation device as an example of direct current power generation equipment.
  • the storage battery 10 2 is constituted by a secondary battery capable of storing DC power and outputting the stored DC power.
  • the DC distribution board 1 1 0 has a solar battery 1 0 1, a storage battery 1 0 2, an AC distribution board 1 0 4 connected to the input terminal, and a DC distribution path 1 0 7 connected to the output terminal.
  • the DC distribution board 1 1 0 is equipped with a solar cell converter 1 1 1 as an output converter, a storage battery converter 1 1 2, an AC-DC converter 1 1 3, and a control unit 1 1 4 and a display unit 1 Configured with 1-5.
  • the output line of the solar cell 10 1 1 is branched into two, and the power conditioner 1 0 3 and the solar cell converter 1 1 1 of the DC distribution board 1 1 0 are connected in parallel.
  • the inverter 1 0 3 converts the DC power output from the solar cell 1 0 1 into AC power synchronized with the phase of the commercial power 1 0 5 and outputs it, and the converted AC power 1 0 5 Reverse current.
  • the solar cell converter 1 1 1 includes a DC-DC converter, and converts DC power output from the solar cell 1 0 1 to a desired voltage level and outputs the voltage.
  • the storage battery converter 1 1 2 includes a DC-DC converter, converts the DC power output from the storage battery 1 0 2 to a desired voltage level, and outputs the converted voltage.
  • the AC-DC converter 1 1 3 converts the AC power supplied from the AC distribution board 1 0 4 into DC power of a desired voltage level and outputs the same.
  • the power conditioner 10 3 is a boosting circuit (not shown) that boosts the DC output of the solar cell 101, and a sine wave that synchronizes the DC output boosted by the boosting circuit with the phase of the AC power system AC. It has an inverter (not shown) that converts it into AC output, an inverter control circuit (not shown) that adjusts the AC output by controlling the inverter, a grid interconnection protection device, and the like.
  • the AC distribution board 10 4 is a main breaker (not shown) whose primary side is connected to a commercial power source 10 5 in a box with a door, similar to a so-called residential distribution board (housing board), and A plurality of branch breakers, etc.
  • the output line of the power conditioner 10 3 is drawn into the box of the AC distribution board 10 4, and the output line of the power conditioner 1 0 3 is connected in parallel to the commercial power supply 1 0 5 in the box. ing.
  • AC distribution circuit 1 0 6 is connected to the secondary side of the branch breaker. AC power is supplied to AC load equipment in the home via the AC distribution path 1 0 6.
  • the solar cell converter 1 1 1 and the storage battery converter 1 1 2 are each composed of, for example, a switching regulator, etc., and detect the output voltage and target the detected output voltage.
  • the voltage level of the DC power output from the solar cell 101 is converted to a desired voltage level by a constant voltage control system that performs control (feedpack control) to increase or decrease the output voltage to match the voltage.
  • AC-DC converter 1 1 3 is composed of, for example, a switching regulator, an inverter, etc., and rectifies AC voltage into DC voltage and performs constant voltage control of output voltage by feedback control. Converts AC power output from 0 4 to DC power at a desired voltage level.
  • Comparator for solar cell 1 1 1, Converter for storage battery 1 1 2, AC — DC converter 1 1 3 are connected in parallel and connected to DC distribution line 1 0 7, this DC distribution line 1 0 7 Is provided with a protection circuit (not shown). Then, one of the DC power converted to the desired voltage level by each output converter of the solar cell converter 1 1 1, the storage battery converter 1 1 2, and the AC-DC converter 1 1 3 Supplied to the DC load equipment via the DC distribution path 1 07.
  • the control unit 1 14 is configured by an information processing apparatus having a microcomputer or the like, and controls operation of each unit of the DC distribution board 1 10.
  • the control unit 1 1 4 performs the ONZOFF control and output voltage control of the converter operation of the solar cell converter 1 1 1, storage battery converter 1 1 2, AC-DC converter 1 1 3, and display Controls the display of part 1 1 5.
  • the display unit 1 1 5 is composed of a liquid crystal display device, etc., and displays various information such as the operating status of the DC distribution board 1 1 0 by letters, numbers, images, etc. based on instructions from the control unit 1 1 4 Display.
  • the power source is connected to each power source.
  • the output voltage of the converter for output is controlled so as to have a predetermined voltage difference between the converters.
  • the output priority order of a plurality of power sources is determined in advance, and in accordance with this priority order, for example, the higher output voltage is set in the order of solar battery> commercial power> storage battery.
  • the output voltage is always a constant voltage difference between the converters of the solar battery converter 1 1 1, AC-DC converter 1 1 3, and storage battery converter 1 1 2.
  • the output voltage of the converter is controlled.
  • DC power can be output from the output converter of the desired power source according to a preset order depending on the state of each power source.
  • the output priorities of the plurality of power sources set in advance are: solar cell> commercial power> storage battery in order of higher set voltage.
  • a voltage dividing resistor having a predetermined voltage dividing ratio is provided in the output voltage detection unit, and the output terminals of the output converters are connected.
  • An output voltage having a detection voltage difference set for each output converter by the voltage dividing resistor is output These can be obtained and used as the output voltage detection value (feedback detection voltage) of each converter for output.
  • the voltage difference between the output voltages of the output converters becomes constant, and even if the output state of any of the output converters changes, the output voltage of all the converters for output becomes a relative voltage difference by feedback control. It is controlled while holding. For this reason, the output voltage of each output converter does not vary individually, but is controlled so that each set voltage has a certain voltage difference.
  • the output voltage of a plurality of output converters is connected in parallel, and output voltage control is performed so that a constant voltage difference is always generated with respect to the output voltage of each output converter. It is possible to output DC power from the output converter of any one power source according to the state in order.
  • FIG. 2 is a diagram showing the main configuration of the power distribution system of the present embodiment.
  • the solar cell converter 1 1 1 connected to the output line of the solar cell 1 0 1 is a feedback control unit 1 2 1 that performs feedback control of the output voltage, and voltage detection that detects the output voltage of the solar cell 1 0 1 Part 1 2 4.
  • the storage battery comparator 1 1 2 connected to the output line of the storage battery 1 0 2 is a feedback control unit 1 2 2 that performs feedback control of the output voltage, and a voltage detection unit 1 2 that detects the output voltage of the storage battery 1 0 2 Have five.
  • the AC-DC converter 1 1 3 connected to the output line of the commercial power supply 10 5 is a feedback control unit 1 2 3 that performs feedback control of the output voltage, and a power failure detection unit that detects the power failure status of the commercial power supply 1 0 5 1 2 6
  • These output converters have their output terminals connected in parallel to each other and connected to the DC distribution path 10 07.
  • the difference value between the reference voltage value based on the output voltage command value and the output voltage detection value is used as the feedback control value in the feedback control units 1 2 1, 1 2 2, 1 2 3
  • An output voltage control unit 10 for feedback is provided.
  • the DC distribution board 110 is provided with a system control unit 30 using a microcomputer or the like.
  • the functions of the control unit 1 1 4 of the DC distribution board 1 1 0 are realized by the output voltage control unit 10 and the system control unit 30 and the output voltage detection unit 25 described later.
  • the output voltage control unit 10 is a function of each output converter. Output control command value from solar battery output control unit 1 1, storage battery output control unit 1 2, AC-DC output control unit 13 and system control unit 30 And a voltage conversion unit 14 for converting into a value.
  • the output voltage control unit 10 is an integrated output voltage detection unit in the three control units of the solar cell output control unit 1 1, the storage battery output control unit 1 2, and the AC — DC output control unit 1 3.
  • the control unit 16 includes a comparison unit 16 for comparing the reference voltage value and the output voltage detection value.
  • the output voltage detection unit 15 is configured by a voltage dividing resistor in which resistance elements R1, R2, R3, and R4 are connected in series, and the voltage at the voltage dividing point of each resistance element connection is It is output as the output voltage detection value of the output converter.
  • the comparison unit 16 includes comparators CP1, CP2, and CP3, compares the output voltage detection value of each output converter with the reference voltage value, and performs feedback control using the difference value as a feedback control value. Return to parts 1 2 1, 1 2 2, 1 2 3.
  • the storage battery output control unit 12 is provided with another output voltage detection unit 21 and a comparison unit 22 as an independent feedback control system.
  • a diode 1 2 7 is connected in series between the output line of the storage battery converter 1 1 2 and the connection point with the other output converter on the positive side. The output voltage is separated from other power sources.
  • a switching switch 23 is provided at the output end of the comparison unit 22 so that the operation of the independent feedback control system by the output voltage detection unit 21 and the comparison unit 22 can be turned on and off.
  • the set voltage of this independent feedback control system is set lower than the set output voltage of the three cooperative feedback control systems by the solar cell output control unit 1 1, the storage battery output control unit 1 2, and the AC-DC output control unit 1 3.
  • a switching switch 1 2 8 is provided at the input portion of the storage battery comparator 1 1 2 so that the output of the storage battery 1 0 2 can be turned on and off.
  • the DC distribution path 10 7 is provided with an output voltage detector 25 for detecting the output voltage of the DC power output output from any of the output converters.
  • the output voltage detection unit 25, and the voltage detection units 1 2 4, 1 2 5, and the power failure detection unit 1 26 function as an output state detection unit.
  • the converter output voltage information from the output voltage detector 2 5, the solar battery output detection information from the voltage detector 1 2 4, the storage battery output detection information from the voltage detector 1 2 5, and the power outage detection information from the power outage detector 1 2 6 Input to the control unit 30 to determine the state of each unit.
  • the system control unit 30 changes the output voltage command value and switches the output voltage of each output converter according to the state of each unit.
  • the system control unit 30 operates by receiving power supply from the output of the DC power distribution path 107 or the storage battery 102.
  • diodes are connected in series, and the cathodes of the diodes are connected in parallel and connected to the system control unit 30. With such a diode connection, the DC power having the higher voltage is input to the system control unit 30.
  • FIG. 3 shows the power distribution system of this embodiment. It is a flowchart which shows the operation
  • FIG. 3 shows the control procedure according to the situation, focusing on the operation of the system control unit 30 functioning as the control unit 1 1 4 of the DC distribution board 1 1.
  • the system control unit 30 refers to the output of the voltage detection unit 1 24 of the solar cell converter 1 1 1 and determines whether the output voltage of the solar cell 1 01 is within the output range of the solar cell converter 1 1 1. (Step S 1 1). Here, if it is within the output range of the solar cell comparator 1 1 1, the operation command is sent to the solar cell converter 1 1 1 to send it to the solar cell converter 1 1 1, the storage battery converter 1 1 2, Turn on the AC-DC converter 1 1 3 (Step S 1 2), and use the output voltage control unit 1 0 as the external command value for output voltage control (output voltage command value) when the solar battery is output. (Step S 1 3).
  • the output voltage of each output converter is set in advance so that it has a constant voltage difference in the order of solar cell> commercial power source> storage battery, and is controlled with this set voltage as the target. .
  • the output voltage detection value for each output converter is stored in a battery that is connected to a commercial power source from a solar cell. In this order, the voltage difference is constant.
  • the output voltage control is performed by the feedback control unit of each output converter, so that each output converter outputs a desired output voltage having a certain voltage difference.
  • step S 14 At the time of output from the solar cell 101, by giving the external command value V1 as described above, the output voltage of the solar cell converter 1 1 1 is controlled to become the predetermined set output voltage Vout, and the direct current is It is output via the power distribution path 107 (step S 14).
  • the system control unit 30 sets the power failure detection unit 1 26 of the AC-DC converter 1 1 3 Look at the output to determine if commercial power 105 is being supplied (step S 15).
  • an operation command is sent to the AC-DC converter 1 1 3 and the AC-DC converter 1 1 3 and storage battery comparator 1 1 2 Turn on the operation (step S16), and give the output voltage control unit 10 with the value V2 at the time of commercial power output as an external command value for output voltage control (step S17). Based on this external command value V2, output voltage control of each output converter is executed by feedback control.
  • step S 15 when the commercial power source 05 is not supplied and there is a power failure, the system control unit 30 refers to the output of the voltage detection unit 1 25 of the storage battery converter 1 1 2 and the storage battery 1 It is determined whether the output range is 02 and output is possible (step S 19).
  • an operation command is sent to the storage battery converter 1 1 2 to turn on the operation of the storage battery converter 1 1 2 (step S20), and the output voltage control
  • the value V3 at the time of storage battery output is given to the output voltage control unit 10 as an external command value (step S21).
  • output voltage control of each output converter is executed by feedback control.
  • the output voltage of the storage battery converter 1 1 2 is controlled to become the predetermined set output voltage Vout, and the DC distribution line 1 Is output via 07 (step S22).
  • the output voltage of each output converter is set to maintain the magnitude relationship of solar cell> commercial power source> storage battery, so the value of the external command value has the magnitude relationship of V 1 ⁇ V2 ⁇ V3.
  • the output voltage from the output converter that is set and output at that time is controlled to the set output voltage Vout.
  • step S 19 if the amount of electricity stored in storage battery 102 is less than the predetermined value and out of the output range, an operation command is sent to storage battery converter 1 1 2 and storage battery converter 1 1 2 The operation is turned off (step S23), the changeover switch 128 of storage battery 102 is turned off (step S24), and the output from the storage battery converter 1 1 2 is stopped (step S25). As a result, power is supplied only to the microcomputer of the system control unit 30.
  • the state determination method is not limited to this, but the external command value is switched by determining the state of each power source. Based on the output of the output voltage detector 25 of the DC distribution path 1 07, the status of each power source of the solar battery 1001, commercial power supply 105, and storage battery 102 is determined, and the external command value for control is switched according to the status. It is also possible to control the output voltage at the time of output from each power source.
  • FIG. 4 is a diagram showing an example of the state of the power source and the output voltage setting in each state in the power distribution system of the present embodiment.
  • Figure 4 assumes each state of whether or not power can be supplied from the solar cell 101 depending on the intensity of solar radiation in the day and night, and whether or not the power can be supplied from the commercial power source 105 depending on whether there is a power outage.
  • An example of output voltage control is shown. In the example shown in the figure, V01 to V07 are set to constant voltage differences, and V04 is set to the set output voltage Vout.
  • the control target value of the output voltage of each output converter of the solar battery 1101, the commercial power supply 105, and the storage battery 1002 ( The set voltage is either (V04, V03, V02), (V05, V04, V03), or (V06, V05, V04) according to the state.
  • the external command value (output voltage command value) for setting the output voltage output from the system control unit 30 is V 1 (solar battery) ⁇ V2 (commercial power) ⁇ V3 (storage battery).
  • Solar cell 1101 generates power only during the day and stops at night.
  • Commercial power 1 05 Normally, the supplied power is output, and the output stops in the event of a power failure.
  • the storage battery 10 2 is used for backup output, and charging power is output when there is no output from both the solar battery 10 1 and the commercial power supply 1 0 5 (at night power failure). If there is a long-term power outage at night, the battery will be over-discharged, so if it falls below the specified storage battery capacity, the output of the storage battery 1 0 2 will be stopped, and the storage battery will be stored only with the microcomputer in the system controller 30. 1 0 Enter standby mode to receive power from 2.
  • the external control value V 1 is given from the system controller 30 and the set voltage of each output converter is set to (V04, V03, V02). Outputs the set output voltage Vout. In this case, since the output voltage of the other output converter is lower than Vout, the DC power from the solar cell converter 1 1 1 is output.
  • an external command value V 2 is given from the system control unit 30 to set the setting voltage of each output converter to (V05, V04, V03), and the setting output from the AC-DC converter 1 1 3 with the second priority. Output voltage Vout. That is, the system control unit 30 switches the external command value from V 1 to V 2 when shifting from day to night, and shifts the output voltage while maintaining the voltage difference of each output converter.
  • the solar cell converter 1 1 1 is operating OFF, and since the output voltage of the storage battery converter 1 1 2 is lower than Vout, the DC power from the A C—D C converter 1 1 3 is output.
  • the system controller 30 switches the external command value from V 2 to V 1 and shifts the output voltage while maintaining the voltage difference of each output converter.
  • Converter 1 1 Outputs the set output voltage Vout from 1. Switching between day and night control may be done by monitoring the output of the solar cell 1 0 1 or the solar cell converter 1 1 1 and judging the status, or the system control unit 3 0 may be equipped with a timer unit such as a timer. It is also possible to switch between them by judging the state of day and night according to the time.
  • an external command value V 3 is given from the system control unit 30 to set the output converter setting voltage to (V06, V05, V04). Outputs the set output voltage Vout.
  • the system controller 30 switches the external command value from V 2 to V 3 and shifts the output voltage while maintaining the voltage difference of each output converter.
  • the solar cell converter 1 1 1 and the A C—D C converter 1 1 3 are operating OFF, and the DC power from the storage battery converter 1 1 2 is output.
  • the system controller 30 switches the external command value from V3 to V2, shifts the output voltage while maintaining the voltage difference of each output converter, and the AC-DC converter 1 1 3 Outputs the set output voltage Vout.
  • the system control unit 30 When a power failure occurs in the daytime, the system control unit 30 continues the output from the solar cell converter 1 1 1 while maintaining the external command value V 1 without changing the operation. If a power outage occurs in the daytime and it goes to the night without returning, the system control unit 30 switches the external command value from V1 to V3, and the DC power output from the solar cell converter 1 1 1 Switch to storage battery converter 1 1 2 In addition, when a power failure occurs at night and the day shifts to daytime without returning, the system The control unit 30 switches the external command value from V 3 to V 1 and switches the DC power output from the storage battery converter 1 1 2 to the solar cell converter 1 1 1.
  • the system controller 30 stops the output of the storage battery converter 1 1 2 when the storage battery capacity of the storage battery 1 0 2 falls below a predetermined value, To do.
  • the system controller 30 will set the external command value to V 1 if it is within the output range of the solar cell converter 1 1 1 and V 2 if it is outside the output range. If output is possible according to priority, output from the solar cell converter 1 1 1, otherwise output from the AC-DC converter 1 1 3.
  • the system control unit 30 outputs the external command value (output voltage command value) so that the output voltage of the output converter having the higher output priority is the predetermined set output voltage Vout.
  • the output voltage command value is switched so that the output voltage of the next-order output comparator becomes the set output voltage Vout.
  • the output voltage control unit 10 and the output voltage detection unit 15 are not limited to the configuration shown in FIG. 2, but may take other configurations. A modification of the configuration of the output voltage control unit and the output voltage detection unit is shown below.
  • FIG. 5 is a diagram showing a first modification of the output voltage control unit having another configuration of the output voltage detection unit in the present embodiment.
  • the output voltage control unit 1 O A of the first modification includes an output voltage detection unit 15 A in which the connection configuration of the voltage dividing resistor is changed.
  • resistive elements R 11, R 12 and FM 3 are connected in parallel, and these are connected in series to a single resistive element R 14 and each is divided by one resistor. It consists of a voltage divider resistor.
  • the voltage at the voltage dividing point at the connection between each resistance element R 11, R 12, R 13 and the resistance element R 1 is output as the output voltage detection value of each output converter.
  • the resistance value of each resistance element is set so that the output voltage detection value for each output converter has a certain voltage difference in the order of solar cell commercial power supply ⁇ storage battery. The rest is the same as the configuration of FIG.
  • FIG. 6 is a diagram showing a second modification of the output voltage control unit having another configuration of the output voltage detection unit in the present embodiment.
  • the output voltage control unit 10 B according to the second modification includes an output voltage detection unit 15 B in which the connection configuration of the voltage dividing resistor is further changed.
  • Output voltage detector 15 B is a voltage divider in which resistive elements R 2 1 and R 2 2, R 2 3 and R 2 4, R 2 5 and R 2 6 are connected in series and divided in parallel. Consists of resistors.
  • the voltage at the voltage dividing point at the connection of each resistance element R 2 1 and R 2 2, R 2 3 and R 2 4, R 2 5 and R 26 is output as the output voltage detection value of each output converter.
  • FIG. 9 is a diagram showing a third modification of the output voltage control unit in the present embodiment.
  • the third modification includes output voltage control units 41, 42, and 43 for each output converter.
  • the output voltage control unit 4 2 connected to the storage battery converter 1 1 2 includes a voltage conversion unit 4 4 and a storage battery output control unit 4 7.
  • the storage battery output control unit 4 7 is an output voltage detection unit 4 using a voltage dividing resistor 4 5 and a comparator using comparator 46.
  • the configuration of the output voltage control units 4 1 and 4 3 is also the same. These output voltage control units 4 1, 4 2, 4 3 are given one output voltage command value from the system control unit 30, and based on this output voltage command value, feedback of the output voltage of each output converter is performed. Control is performed. The rest is the same as the configuration of FIG.
  • one command value is set to the output voltage control unit of each output converter so that the amount of change of the output voltage is almost the same for each converter.
  • the output voltage detectors 15, 15 A, and 15 B that detect the output voltages of the plurality of output converters have a configuration in which a predetermined voltage difference is provided for each detected voltage. In this way, a detection voltage difference is provided for each output comparator, and three cooperative feedback control systems are configured by the solar cell output control unit 1 1, the storage battery output control unit 1 2, and the AC-DC output control unit 1 3. . Because this detected voltage difference is linked to the difference in control target value for each converter, the output voltage difference is set relatively in each output converter, and the converter set as the highest output voltage among the converters in the output range. Can be output stably.
  • the output voltage detectors of a plurality of output converters are integrated to form a single output voltage detector 15.
  • the output voltage detection unit is provided with a voltage dividing resistor, and a detection voltage difference between a plurality of output converters is obtained by the voltage dividing resistor. This makes it possible to set the detection voltage difference reliably with a simple configuration.
  • the reference voltage value based on the output voltage command value from the external system control unit 30 (control unit 1 1 4) and the output voltage detection units corresponding to a plurality of output converters 1 5, 1 5 A, 1 5 A comparison unit 16 that compares the detection voltage value of B is provided, and the comparison result is fed back to the feedback control unit 1 2 1, 1 2 2, 1 2 3 to enable variable setting of the output voltage. .
  • the output voltage can be varied while maintaining a predetermined voltage difference.
  • a voltage conversion unit 14 for converting an output voltage command value from the external system control unit 30 into a reference voltage value is provided. Thereby, for example, the input variation (D ZA error) of the output voltage command value can be reduced without providing a plurality of DZA conversion units for each output converter.
  • each system has an output status detection unit that detects the output status of each power source and each output converter, such as the output presence and output voltage, and the system control unit 30 (control unit 1 1 4)
  • the system control unit 30 control unit 1 1 4
  • the system voltage command value By varying the output voltage command value, the output voltage of each converter for output is changed while maintaining the voltage difference.
  • the system voltage (set output voltage) by the output voltage of the output converter (converter with the highest output voltage) is always constant. In this way, it is possible to output DC power.
  • the output voltage setting value of the converter for the output of multiple power sources is as follows: Solar cell converter 1 1 1> AC-DC converter 1 1 3> Storage battery converter 1 1 2 and Solar cell 1 0 1> Commercial power 1
  • the output priority order of a plurality of power sources is set in the order of 0 5> storage battery 1 0 2. This makes it possible to effectively use natural energy with the solar cell as the top.
  • the storage battery to be used as a backup output in the event of a power outage at night as much as possible, it should be used only when none of the upper power sources can be used, and the backup time when necessary Can be secured.
  • a diode 1 2 7 is provided at the output part of the storage battery converter 1 1 2 to separate the output voltage by the diode 1 2 7, and an independent feedback control system (output voltage) is provided in the output voltage control part 10.
  • Another detector 2 1 and comparator 2 2) are provided separately.
  • the set voltage of the independent feed pack control system for the storage battery 102 is set lower than the set output voltage of the three linked feedback control systems.
  • Storage battery 1 0 2 is normally set not to be used as a backup output as much as possible. When output from another power source, the set voltage becomes lower than the others and the output from storage battery converter 1 1 2 is not output. So I don't know if it can always work.
  • the independent feedback control system compares the reference voltage value based on the output voltage command value from the external system control unit 30 (control unit 1 1 4) with the detection voltage value of the output voltage detection unit 21.
  • the comparison unit 2 2 is provided, and the comparison result is fed back to the feedback control unit 1 2 2 so that the output voltage can be variably set.
  • the output voltage can be relatively varied while maintaining a predetermined voltage difference from the DC power voltage from the power source that is currently output, and the converter output operation when using a storage battery Can be faster.
  • the setting of the output priority order of a plurality of power sources is not limited to the above order, and various setting examples are possible depending on the type and number of power sources, specifications of the installation location, and the like.
  • the output voltage setting value of each output converter may be in the order of solar battery> storage battery (energy saving operation)> commercial power supply> storage battery (backup operation). It is possible. Even in such an output voltage setting, it is possible to stably output from one output converter based on the output priority order set in advance according to the state, similarly to the control example described above. .
  • the power is output from the storage battery before using the commercial power supply.
  • the output voltage control of the storage battery during energy saving operation uses an independent feedback control system by the output voltage detection unit 21 and the comparison unit 2 2, and a switching switch 2 3 is provided to provide a feed / The operation of the control system can be switched. As a result, if the preset battery level is reached, the output can be switched from the commercial power source to the storage battery, and the storage battery can be used for backup.
  • the independent feedback control system is switched by a switching switch or the like, a diode for separating the output voltage is not necessarily provided.
  • the set voltage of the independent feedback control system can be arbitrarily set, such as setting any one of these intermediate voltages for each set voltage of the three linked feedback control systems.
  • the output from the storage battery converter 1 12 is stopped if the storage amount of the storage battery 10 2 becomes less than a predetermined value.
  • the microcomputer of the system control unit 30 is supplied with power from the storage battery 10 2 to enter a standby state.
  • the operation of the system control unit 30 can be continued, and the power from the upper power source can be immediately output when power is restored.
  • the system control unit 3 continues the standby state until at least sufficient power is generated by the solar cell 1 0 1 and is within the output range of the solar cell converter 1 1 1. Supply power to 0 only.
  • FIG. 8 is a diagram showing the output characteristics of each power source in the present embodiment.
  • FIG. 5 is a characteristic diagram showing output characteristics of each output converter of the converter 1 1 1, the AC-DC converter 1 1 3, and the storage battery converter 1 1 2.
  • the horizontal axis indicates current (A) and the vertical axis indicates voltage (V), and each output converter has a drooping output characteristic.
  • the DC power from the output converter of the highest voltage power source here, the converter for solar cells
  • output from multiple power sources can be used for large capacity output.
  • the present embodiment it is possible to output DC power from the output converter of a desired power source according to a preset order depending on the state of each power source.
  • a predetermined voltage difference is set for the detection voltage for each output converter, and the detected voltage difference is linked to the difference in control target value for each output converter. The difference is set and it becomes possible to output stably from the converter with the highest output voltage setting.
  • the output voltage control unit includes a comparison unit that compares the reference voltage value based on the output voltage command value from the system control unit and the detection voltage values of the plurality of output converters by the output voltage detection unit. Are fed back to each output converter.
  • the output voltage of each output converter can be variably set, and the output voltage can be varied while maintaining a predetermined voltage difference.
  • DZA error By providing a voltage conversion unit that converts the output voltage command value from the system control unit to a reference voltage value, for example, without providing multiple DZA conversion units for each output converter, etc. (DZA error) can be reduced.
  • an output state detection unit that detects the output state of each power source and each output converter is provided, and the system control unit is configured to vary the output voltage command value according to the state.
  • the output voltage of each output converter is changed while maintaining the voltage difference, and the output converter (the converter with the highest output voltage) is switched when switching the output converter to output depending on the state. It is possible to output DC power so that the system voltage (set output voltage) is always constant.
  • the system control unit outputs the output voltage command value so that the output voltage of the output converter with the higher output priority order becomes the predetermined set output voltage, and the output from the higher output converter is obtained normally.
  • the output voltage command value is switched so that the output voltage of the output converter of the next rank will be the set output voltage. Do it.
  • the output priority order it is possible to output DC power of a predetermined set output voltage that can be output in order from the higher one.
  • at least one of the plurality of output converters having the output priority set higher is configured with a converter having a drooping output characteristic.
  • FIG. 9 is a diagram illustrating a configuration of main parts of the power distribution system according to the second embodiment.
  • the power distribution system includes a solar cell converter 1 1 1, a storage battery converter 1 1 2, and an AC 1 DC converter 1 1 3.
  • the output terminals of these converters are connected in parallel and connected to the DC distribution path 10 07, and the DC power from either converter is output as the DC power output 1 3 1 via the DC distribution path 10 07. .
  • the storage battery output control unit 12 is provided with another output voltage detection unit 21 and a comparison unit 22 as an independent feedback control system. And connected to the output line of the storage battery converter 1 1 2.
  • the comparison unit 2 2 includes a comparator CP 4, and a switching switch (SW) 2 3 is provided at the output terminal of the comparison unit 2 2, and independent feeds by the output voltage detection unit 2 1 and the comparison unit 2 2.
  • the pack control system can be turned ONZ 0 FF.
  • the switch 2 3 is not only an ONZOFF switching type that turns on or off the output of the comparator CP 4 of the comparison unit 2 2, but also the output of the comparator CP 1 of the comparison unit 16 and the output of the comparator CP 4 of the comparison unit 2 2. It is also possible to use a two-system switching type switch that selectively switches between. Note that the output line of the storage battery converter 1 1 2 does not have a diode for separating the output voltage from other power sources.
  • the comparison unit 22 compares the output voltage detection value of the storage battery converter 1 1 2 with the reference voltage value V 4 and feeds back the difference value as a feedback control value to the feedback control unit of the storage battery converter 1 1 2.
  • the system controller 7 OA sets the reference voltage values of the comparators in the comparators 16 and 22 and detects the remaining amount of the storage battery 102 and controls the ON / OFF of the switch 2 3 to provide feedback control. Switches the system operation.
  • Other configurations are the same as those of the first embodiment shown in FIG.
  • the reference voltage value is V 1 ⁇ V 4 ⁇ V 2 ⁇ V 3.
  • the output voltage control (reference voltage value V 4) by an independent feedback control system can be used for the operation of the storage battery in the energy saving mode.
  • the output power from the solar battery 1 0 1 is stored in the storage battery 1 0 2 and the power from this storage battery 1 0 2 is used so that the power from the commercial power supply 1 0 5 is not used as much as possible.
  • each output converter The output voltage is set to have a certain voltage difference in the order of solar battery> storage battery (for energy saving)> commercial power supply> storage battery (for backup).
  • the output power of the storage battery 10 2 is output before using the output power from the commercial power supply 10 5.
  • the output priority of each converter can be changed by arbitrarily setting the reference voltage value of the independent feedback control system for each reference voltage value of the three cooperative feedback control systems. .
  • FIG. 10 is a diagram illustrating a configuration of main parts of the power distribution system according to the third embodiment.
  • a diode 60 for separating the output voltage is provided in series between the output terminal of the storage battery converter 1 1 2 and the connection point of the output path on the positive side of each output converter. It has been.
  • the storage battery output control unit 12 is further provided with another output voltage detection unit 61 and a comparison unit 62 as an independent feedback control system.
  • the output line of the converter 1 1 2 is connected to the anode side of the diode 60.
  • the comparison unit 62 includes a comparator CP5, compares the output voltage detection value before the diode 60 of the storage battery converter 11 12 with the reference voltage value V5, and calculates the difference value. It is fed back to the feedback controller of the converter for storage battery 1 1 2 as a one-back control value.
  • the system control unit 70 B sets the reference voltage value (set voltage) of each comparator of the comparison unit 1 6 and the comparison unit 6 2, and has three cooperative feed / lock control systems and independent feed / cock. Control the operation of the control system.
  • Other configurations are the same as those of the first embodiment shown in FIG.
  • the reference voltage values are V 1 ⁇ V 2 ⁇ V 3 and V 3 ⁇ V 5.
  • the output voltage of each output converter is set to have a constant voltage difference in the order of solar cell> commercial power source> storage battery (for backup)> storage battery (independent feedback).
  • the output voltage of the DC power output 1 3 1 from the storage battery converter 1 1 2 is controlled by an independent feedback control system.
  • the output voltage is controlled with a low voltage.
  • the output voltage of the storage battery converter 1 1 2 is separated and controlled by an independent feedback control system, so that the storage battery converter 1 1 2 always outputs, and the storage battery 1 0 2
  • the feedback response at the time of output switching when using the output power of can be improved.
  • the converter output switching operation when using the storage battery can be speeded up.
  • FIG. 11 is a diagram showing the main configuration of the power distribution system according to the fourth embodiment. Fourth implementation In this state, a storage battery converter input / output detection unit that detects the input and output of the storage battery converter 112 is provided, and the detection result of the storage battery converter input / output detection unit is input to the system control unit 7 OC.
  • the output voltage control unit 50 C has the same configuration as that of the output voltage control unit 50 B of the third embodiment shown in FIG.
  • the system controller 7 OC inputs the input voltage to the storage battery converter 1 1 2 or the detected value of the remaining capacity of the storage battery 1 0 2 and the detected value of the output voltage from the storage battery converter 1 1 2, and It monitors the input voltage at the input of converter 1 1 2 and the output voltage at the anode side of diode 60 at the output.
  • FIG. 12 is a diagram illustrating a configuration of main parts of a power distribution system according to the fifth embodiment.
  • a diode 63 is connected in series with the output terminal of the comparator CP5 of the comparator 62 of the independent feedback control system in the storage battery output controller 12 of the output voltage controller 50 D. Connected and provided.
  • a diode 64 is connected in series to the output terminal of the comparator CP1 of the comparator 16 in the cooperative feedback control system, and the cathodes of these diodes 6 3 and 6 4 are connected in parallel to switch feedback output. And is connected to the feedback controller of the storage battery comparator 1 1 2.
  • Other configurations are the same as those of the fourth embodiment shown in FIG.
  • the system control unit 70 D has the same function as the system control unit 70 C of the fourth embodiment.
  • the diodes 6 3 and 6 4 of the feedback output switching unit are applied to any of the independent feedback control systems of the configuration of the third embodiment in FIG. 10 and the configuration of the fourth embodiment in FIG. It is also possible to provide it. Also, instead of the parallel connection of the diodes 6 3 and 6 4, as in the switching switch 23 of the second embodiment in FIG. It is also possible to switch the feedback output of parts 6 2 and 16.
  • the feedback operation is reliably switched between the cooperative feedback control system and the independent feedback control system, and the output voltage control is performed. It can be performed.
  • the operation can be switched without requiring a control signal from the system controller 70 D, and the feedback output can be switched with a simple configuration. Can be realized.
  • FIG. 13 is a diagram showing the main configuration of the power distribution system according to the sixth embodiment.
  • the AC-DC converter 1 1 3 has an independent feedback control system. .
  • AC — DC converter 1 1 Between the output end of 3 and the connection point of the output path on the positive side of each output converter
  • a diode 65 for separating the output voltage is connected in series.
  • the AC-DC output control unit 13 is further provided with another output voltage detection unit 66 and a comparison unit 67 as an independent feedback control system. It is connected to the anode side of the diode 65 in the output line of the converter 1 1 3.
  • the comparison unit 67 includes a comparator CP6, compares the output voltage detection value on the near side of the diode 65 of the AC-DC converter 1 1 3 with the reference voltage value V6, and uses the difference value as a feedback control value.
  • AC Return to the feedback control section of DC converter 1 1 3
  • a diode 68 is connected in series to the output terminal of the comparator CP6 of the comparator 67 of the independent feedback control system.
  • a diode 69 is connected in series to the output terminal of the comparator CP 2 of the comparison unit 16 of the cooperative feedback control system, and the force swords of these diodes 68 and 69 are connected in parallel to provide a feedback output switching unit. And is connected to the feedback control unit of the AC-DC converter 1 1 3.
  • the system control unit 70 E sets the reference voltage values (set voltages) of the comparators of the comparison unit 16, the comparison unit 62, and the comparison unit 67, and provides three cooperative feedback control systems and two independent feedback controls. Control system operation. Other configurations are the same as those of the fifth embodiment shown in FIG.
  • the reference voltage values are V 1 ⁇ V2 ⁇ V3, V3 ⁇ V5, V2 ⁇ V6, and V 6 ⁇ V5.
  • the output voltage of each output converter is set to have a constant voltage difference in the order of solar battery> commercial power> commercial power (independent feedback)> storage battery (for backup)> storage battery (independent feedback). Is done.
  • an independent feedback control system is used on the front side of the diode 65 in the output line of the AC-DC converter 1 13. The output voltage is controlled at a voltage lower than the output voltage at the DC power output 1 31 from the AC-DC converter 1 1 3. By such output voltage control, the AC-DC converter 1 1 3 always outputs with the set voltage of the reference voltage value V 6.
  • the output voltage of the AC-DC converter 1 1 3 is separated and controlled by an independent feedback control system, so that the AC-DC converter 1 1 3 always outputs and commercial power 1 Feedback responsiveness when switching output when using output power from 05 can be improved. This makes it possible to speed up the converter output switching operation when using commercial power.
  • FIG. 14 is a diagram showing the main configuration of the power distribution system according to the seventh embodiment.
  • the output voltage control unit 5 OF has the same configuration as that of the output voltage control unit 50E of the sixth embodiment shown in FIG.
  • System controller 7 OF is AC—DC Input the detection value of the input voltage to the converter 1 1 3 and the detection value of the output voltage from the AC—DC converter 1 1 3 and input the input voltage of the input portion of the AC—DC converter 1 1 3 Monitor the output voltage on the anode side of diode 65.
  • the input voltage of the input unit of the storage battery converter 112 and the output voltage on the anode side of the diode 60 of the output unit are monitored.
  • FIG. 15 is a diagram illustrating a configuration of main parts of a power distribution system according to the eighth embodiment.
  • a solar cell converter input / output detector that detects the input and output of the solar cell converter 1 1 1 is provided, and the detection result of this solar cell converter input / output detector is sent to the system controller 7 OG. It is configured to input.
  • a diode 80 for separating the output voltage is connected in series between the output terminal of the solar cell converter 11 1 and the connection point of the output path on the positive electrode side of each output converter.
  • the output voltage control unit 50G and other configurations are the same as those in the seventh embodiment shown in FIG.
  • the system controller 7 OG inputs the detection value of the input voltage to the solar cell converter 1 1 1 and the detection value of the output voltage from the solar cell converter 1 1 1, and the solar cell converter 1 1 1
  • the input voltage of the input section and the output voltage on the anode side of the diode 80 of the output section are monitored. Further, as in the seventh embodiment, the input voltage and output voltage of the storage battery converter 1 1 2 and the AC-DC converter 1 1 3 are monitored.
  • FIG. 16 is a diagram showing a configuration of main parts of a power distribution system according to the ninth embodiment.
  • the ninth embodiment has a configuration in which the second embodiment shown in FIG. 9 and the eighth embodiment shown in FIG. 15 are combined. That is, in the output voltage control unit 5 OH, the storage battery output control unit 12 includes the output voltage detection unit 21, the comparison unit 22, the first independent feedback control system using the switching switch 23, and the output voltage detection unit 61. A second independent feedback control system by part 62 is provided.
  • the AC-DC output control unit 13 is provided with a third independent feedback control system including an output voltage detection unit 66 and a comparison unit 67.
  • Storage battery converter 1 1 2, AC—DC converter 1 1 3, Solar battery converter 1 1 1 Outputs to the output terminal of the output path on the positive side of each output converter. Diodes 60, 65, and 80 for separating voltages are provided in series.
  • the reference voltage values are V 1 ⁇ V4 ⁇ V2 ⁇ V3, V3 ⁇ V5, V2 ⁇ V6, and V6 ⁇ V5.
  • the output voltage of each output converter is constant in the following order: solar battery> storage battery (for energy saving)> commercial power supply> commercial power supply (independent feedback)> storage battery (for backup)> storage battery (independent feedback) It is set to have a voltage difference.
  • the system controller 70 H monitors the input voltage and output voltage of the storage battery converter 1 1 2, the AC-DC converter 1 1 3, and the solar battery converter 1 1 1. Further, the system control unit 7OH performs the detection of the remaining amount of the storage battery 102 and the ONZOFF control of the switching switch 23, as in the second embodiment, and switches the operation of the feedback control system.
  • an effect obtained by combining the above-described second to eighth embodiments can be obtained.
  • the feedback control system in accordance with the remaining capacity of the storage battery 102, it is possible to use the power stored by the solar battery energy and realize energy saving.
  • the independent feedback control system by switching the independent feedback control system to operate, the output priority of each output converter can be changed.
  • the control by the independent feedback control system of the converter for the storage battery 1 1 2 and the control by the independent feedback control system of the AC-DC converter 1 1 3 when using the storage battery or using the commercial power supply
  • Each of the converter output switching operations can be speeded up.
  • the output voltage control unit sets an output voltage having a predetermined voltage difference in the order of solar cell> commercial power> storage battery as the set voltage of the plurality of output converters.
  • the storage battery is normally set to be used as a backup output in the event of a power failure at night, so that it can be used only when none of the upper power sources can be used, and can be backed up when necessary. Time can be secured.
  • the output voltage of the storage battery converter is separated by a diode, and the independent feed / control system is used to set the other feed / control system for the storage battery controller.
  • the independent feedback control system is based on the output voltage command value from the system control unit and relatively outputs the output voltage while maintaining a predetermined voltage difference from the DC power voltage from the current power source. It is variable, and the converter output operation when using a storage battery can be accelerated.
  • the output voltage of the AC-DC converter is separated by a diode, and the output is controlled at a voltage lower than the set voltage of the other feedback control system by the independent feedback control system.
  • the independent feedback control system is based on the output voltage command value from the system control unit, and the output voltage is relatively maintained while maintaining a predetermined voltage difference from the DC power voltage from the currently output power source. The converter output operation when using commercial power can be made faster.
  • the output unit of the independent feedback control system is connected to each output converter via a feedback output switching unit such as a diode, so that the feedback control system independent of the cooperative feedback control system of the plurality of output converters
  • a feedback output switching unit such as a diode
  • output switching of the feedback control system can be realized with a simple configuration.
  • it is possible to determine the failure of the output converter by monitoring the input voltage and the output voltage in at least one of the storage battery converter, AC-DC converter, and solar battery converter.
  • the output voltage control unit the output voltage having a predetermined voltage difference is set in the order of solar battery> storage battery energy saving operation> commercial power> storage battery backup operation as the set voltage of the plurality of output converters, By controlling the output voltage of each output converter, it is possible to stably output from a predetermined output converter based on an output priority set in advance according to the state. In this case, since the power is output from the storage battery before using the commercial power supply, the power stored by the solar battery energy can be reused by the storage battery, and energy saving can be achieved.
  • the output voltage control unit also includes an independent feed / cook control system that controls the output voltage of the storage battery converter, and a switching switch that turns on and off the operation of this independent feed / ⁇ * control system.
  • the output voltage during energy saving operation of the storage battery is controlled by an independent feedback control system.
  • an independent feedback control system for example, when the storage capacity of a preset storage battery is reached, the output can be switched from the commercial power source to the storage battery, and the storage battery can be used as a backup battery when none of the upper power sources can be used. Is available. Also, the output priority of each converter can be changed by switching independent feedback control systems.
  • the system control unit stops the output from the storage battery converter and supplies power from the storage battery only when the power storage capacity of the storage battery falls below a predetermined value during a power outage when commercial power is not supplied. It is set as the structure made into the standby state which receives. As a result, it is possible to stop the backup output from the storage battery in the event of a long-term power failure, etc., continue the operation of the system control unit, and immediately output power from the upper power source when power is restored. . Also, from the time of power failure until power is restored, the standby state is continued at least until it is within the output range of the solar cell converter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un réseau de distribution d'électricité équipé d'une pluralité de convertisseurs de sortie séparés correspondant à une pluralité de sources d'alimentation électrique, qui fournissent en sortie un courant continu à un niveau de tension prédéterminé en fonction du courant électrique fourni par la source d'alimentation à laquelle chaque convertisseur est raccordé; et une unité de commande de réseau qui commande les opérations de régulation de la tension de sortie de la pluralité de convertisseurs de sortie. L'unité de commande de réseau définit une valeur unique de commande de tension de sortie, et combine et modifie la tension de sortie de la pluralité de convertisseurs de sortie.
PCT/IB2010/002459 2009-10-02 2010-09-29 Réseau de distribution d'électricité WO2011039608A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2009-230560 2009-10-02
JP2009230560 2009-10-02
JP2010-099542 2010-04-23
JP2010099542A JP5451504B2 (ja) 2009-10-02 2010-04-23 配電システム

Publications (1)

Publication Number Publication Date
WO2011039608A1 true WO2011039608A1 (fr) 2011-04-07

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PCT/IB2010/002459 WO2011039608A1 (fr) 2009-10-02 2010-09-29 Réseau de distribution d'électricité

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JP (1) JP5451504B2 (fr)
WO (1) WO2011039608A1 (fr)

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US9843186B2 (en) 2012-12-19 2017-12-12 Sion Electric Co., Ltd. Power transmission system
EP2954606B1 (fr) * 2013-02-08 2020-04-29 Giovanni Sala Système pour distribuer et stocker une énergie électrique

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JP2014030302A (ja) * 2012-07-31 2014-02-13 Nippon Telegr & Teleph Corp <Ntt> 品質別直流給電システム
JP6000742B2 (ja) * 2012-08-10 2016-10-05 シャープ株式会社 パワーコンディショナおよび電力供給システム
JP2015023766A (ja) * 2013-07-23 2015-02-02 日本電信電話株式会社 電源切替回路
JP6511656B2 (ja) * 2013-12-26 2019-05-15 日本無線株式会社 独立電源システム
JP2015220889A (ja) * 2014-05-19 2015-12-07 シャープ株式会社 電力供給システム
JP2016144332A (ja) * 2015-02-03 2016-08-08 三菱電機株式会社 直流給電システム
JP2016181977A (ja) * 2015-03-24 2016-10-13 サンケン電気株式会社 電源装置
JP2016181976A (ja) * 2015-03-24 2016-10-13 サンケン電気株式会社 電源装置
CN107743673B (zh) * 2015-06-24 2021-01-26 株式会社村田制作所 能量管理系统
JP6172868B2 (ja) * 2015-08-31 2017-08-02 興和株式会社 電源装置
KR102484889B1 (ko) * 2016-12-27 2023-01-04 현대자동차주식회사 차량용 태양전지 시스템 및 그 제어 방법
CN110121825B (zh) * 2017-01-04 2022-08-09 东芝三菱电机产业系统株式会社 不间断电源系统及不间断电源装置
WO2019009040A1 (fr) * 2017-07-06 2019-01-10 Ntn株式会社 Système d'alimentation électrique cc
JP7165507B2 (ja) * 2017-07-06 2022-11-04 Ntn株式会社 直流給電システム
JP6910905B2 (ja) * 2017-09-25 2021-07-28 ホーチキ株式会社 トンネル防災システム
JP7220071B2 (ja) * 2018-12-21 2023-02-09 株式会社デンソーテン 制御装置および制御方法
JP7045091B2 (ja) * 2020-02-10 2022-03-31 株式会社スマートパワーシステム 電力供給制御装置及び電力供給制御方法
JP7151741B2 (ja) * 2020-03-30 2022-10-12 株式会社デンソー 電圧検出装置
WO2023233651A1 (fr) * 2022-06-03 2023-12-07 三菱電機株式会社 Système de distribution d'énergie cc et dispositif de génération d'alimentation électrique de commande

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EP2954606B1 (fr) * 2013-02-08 2020-04-29 Giovanni Sala Système pour distribuer et stocker une énergie électrique

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JP5451504B2 (ja) 2014-03-26

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