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WO2013002438A1 - Dispositif de commutation et procédé de gestion d'énergie utilisant celui-ci - Google Patents

Dispositif de commutation et procédé de gestion d'énergie utilisant celui-ci Download PDF

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Publication number
WO2013002438A1
WO2013002438A1 PCT/KR2011/004766 KR2011004766W WO2013002438A1 WO 2013002438 A1 WO2013002438 A1 WO 2013002438A1 KR 2011004766 W KR2011004766 W KR 2011004766W WO 2013002438 A1 WO2013002438 A1 WO 2013002438A1
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WO
WIPO (PCT)
Prior art keywords
power
premises
load
amount
distributed
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2011/004766
Other languages
English (en)
Korean (ko)
Inventor
채우규
김주용
이학주
박중성
조성수
이동준
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Korea Electric Power Corp
Original Assignee
Korea Electric Power Corp
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 Korea Electric Power Corp filed Critical Korea Electric Power Corp
Publication of WO2013002438A1 publication Critical patent/WO2013002438A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/12—Circuit arrangements for AC mains or AC distribution networks for adjusting voltage in AC networks by changing a characteristic of the network load
    • 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
    • H02J1/14—Balancing the load in a network
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/24—Circuit arrangements for boards or switchyards
    • 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
    • H02J3/12—Circuit arrangements for AC mains or AC distribution networks for adjusting voltage in AC networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for AC mains or AC distribution networks for adjusting voltage in AC networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • 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
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • H02J2105/51—
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/12—Remote or cooperative charging

Definitions

  • the present invention relates to a switchgear and a power processing method using the same, in particular, to control the power converter to adjust the AC power supplied to the AC booth and DC power supplied to the DC booth, power failure to the power customer when a failure in the upper system device
  • This invention relates to a power distribution panel and a power distribution method using the same, which separates the upper system and power consumers so as not to occur, and provides an electric vehicle charging terminal for charging an electric vehicle.
  • renewable energy or distributed power sources such as solar, wind, and fuel cells have been widely used.
  • a distributed power source such as solar power is installed in connection with the distribution panel, the power generated from the distributed power source is used, and surplus power is sold to the electric power company.
  • the power produced by the distributed power source is DC power, in order to supply power to the DC device, more than two power conversions are required, which causes a lot of power loss.
  • the distributed power supply in operation in conjunction with the switchgear also suspends the production of power, which makes it inefficient to produce power that can be produced during normal operation of the distributed power supply.
  • the present invention relates to a switchgear and a power processing method using the same, in particular, to control the power converter to adjust the AC power supplied to the AC booth and DC power supplied to the DC booth, It is to provide a switchgear and an electric power processing method using the same to separate the upper system and power consumers so as not to generate a power failure in the event of a failure, and to provide an electric vehicle charging terminal for charging the electric vehicle.
  • the power converter for converting the AC power supplied from the AC power supply to DC power or the DC power supplied from the DC power supply to AC power;
  • An AC booth for distributing AC power supplied from the AC power source and the power converter to an on-premises AC power load;
  • a DC booth for distributing DC power supplied from the DC power supply source and the power converter to an internal DC power load;
  • controlling the power converter to adjust the AC power supplied to the AC booth and the DC power supplied to the DC booth by comparing the required power amount of the premises DC power load with the DC power supplied from the DC power supply source.
  • the AC power supply may include one or more of an upper grid device, a distributed AC power generator, and an emergency power generator.
  • the switchgear is configured to determine whether or not a failure of the upper level system device is performed to perform an opening operation when a failure occurs, to electrically shut off the upper level system device, and to perform an input operation at the time of failure recovery to input power supplied from the upper level system device. Can be.
  • the control device may receive opening information from the first breaker and set it to an independent operation mode, and receive input information from the first breaker and set it to a grid-connected operation mode.
  • the switchgear may further include a transformer for lowering the voltage of the power supplied from the upper grid device to a voltage available to the AC power load of the premises.
  • the switchgear under control of the control device, determines whether or not a failure occurs in the secondary side of the transformer, performs an opening operation when a failure occurs, electrically shuts off the upper system device, and performs a closing operation when performing a fault recovery.
  • the apparatus may further include a second circuit breaker for inputting power supplied from the second circuit breaker.
  • the DC power supply source may include a distributed DC power generator.
  • the switchgear compares the required power of the premises DC power load with the generated power of the distributed DC power generator, and the DC power remaining when the required power of the premises DC power load is less than the generated power of the distributed DC power generator. And a power storage device for outputting the stored power when the required power amount of the premises DC power load is greater than the generated power of the distributed DC power generator, wherein the DC power supply further includes the power storage device. Can be.
  • the switchgear may further include a third circuit breaker that cuts or inputs power to the premises AC power load or the premises DC power load by receiving an input or open command from the control device and performing an input or open command. .
  • the premises AC power load includes a plurality of premises non-critical AC power loads and the premises DC power load includes a plurality of premises non-critical DC power loads, wherein the third breaker receives the open command from the control device.
  • the non-critical AC power load of the premises and the power supplied to the plurality of non-critical DC power load of the premises can be sequentially blocked in order of low importance.
  • the DC booth is connected to an electric vehicle charging terminal for charging an electric vehicle, and the control device detects the charging of the electric vehicle through the electric vehicle charging terminal, and the amount of charge available after subtracting the current amount of electric power received from the preset maximum amount of power received.
  • the electric vehicle may be controlled to charge only as much as the chargeable amount by calculating.
  • a power distribution method of a switchgear including a power converter, an AC booth, a DC booth, and a control device includes a required power amount of a DC power load of a premises and a DC power amount supplied from a DC power supply source. Comparing the; When the required power amount of the premises DC power load is greater than the DC power supplied from the DC power supply source, the AC power is converted into DC power through the power converter, and the required power amount of the premises DC power load is supplied from the DC power supply source.
  • the power processing method may include determining whether a higher level system device is broken; Electrically disconnecting the upper system device by performing an opening operation of the first circuit breaker when a failure occurs; And performing input operation of the first circuit breaker to turn on the power supplied from the upper system device when the fault is recovered.
  • the power processing method may further include setting to an independent operation mode after performing the opening operation of the first circuit breaker to electrically shut off the upper system device when the failure occurs. After the step of inputting power supplied from the upper system device by performing the closing operation of the circuit breaker, the method may further include setting to the grid-connected operation mode.
  • the power processing method may further include comparing a frequency of a secondary side of the first circuit breaker with a reference frequency after setting the independent operation mode; Checking whether the power storage device is capable of storing power when the secondary side frequency of the first circuit breaker is greater than a reference frequency; And if the power storage device is capable of storing power, giving a power storage command to the power storage device, and if the power storage device is unable to store power, giving an output reduction command to a distributed power generation device.
  • the power processing method may further include: checking whether an output of the power storage device is increased when the frequency of the secondary side of the first circuit breaker is less than the reference frequency in comparing the frequency of the secondary side of the first circuit breaker with a reference frequency; If the output of the power storage device is increased, giving an output increase command of the power storage device, and if the output of the power storage device is impossible, checking whether the output of the distributed power generation device is possible to increase; And if the output of the distributed power generator is increased, the output increase command of the distributed power generator is issued, and if the output of the distributed power generator is not possible, the premises non-critical power load is sequentially blocked in the order of low importance. It may further comprise the step.
  • the power processing method may include: receiving, by the control device, a power receiving power reduction request from an upper grid device; Checking for the presence of a breakable on-premises non-critical power load; And cutting off the off-premises non-critical power load in the order of interruption if there is a breakable off-premises non-critical power load, and increasing the output according to the order of increasing the output if the non-breaking off-premises non-critical power load exists. It may further include.
  • the power processing method may include: receiving, by the control device, a power transaction fee unit price from an upper system device; Determining whether the amount of power received is needed based on the unit price; Calculating a required breaking load amount when it is determined that the amount of power received is required; Checking for the presence of a breakable on-premises non-critical power load; And cut off the premises non-critical power load in the order of interruption if there is a breakable premises non-critical power load, and if there is no breakable premises non-critical power load, distribute the power by the required disconnection load.
  • the power generation apparatus may further include increasing the output in the order of increasing power.
  • the power processing method includes connecting the DC booth with an electric vehicle charging terminal; Detecting, by the controller, charging of the electric vehicle through the electric vehicle charging terminal of the DC booth; Calculating a chargeable amount obtained by subtracting a current received power amount from a preset maximum received power amount; And controlling the electric vehicle to charge only as much as possible.
  • the present invention relates to a switchgear and a power processing method using the same, in particular, to control the power converter to adjust the AC power supplied to the AC booth and the DC power supplied to the DC booth, the upper system
  • a power distribution panel and a power processing method using the same may be provided to separate an upper system device and a power consumer so as not to cause a power failure and to provide an electric vehicle charging terminal for charging an electric vehicle.
  • FIG. 1 is a block diagram schematically illustrating a power supply system including a switchboard according to an embodiment of the present invention.
  • FIG. 2 is a block diagram specifically illustrating a power supply system including a switchboard according to an embodiment of the present invention.
  • FIG. 3 is an exemplary view showing the interior of the switchboard shown in FIG. 2.
  • FIG. 4 is a flowchart illustrating a method of controlling a power converter in a power processing method according to an embodiment of the present invention.
  • FIG. 5 is a flowchart illustrating a method of controlling the first breaker in the power processing method according to an embodiment of the present invention.
  • FIG. 6 is a flowchart illustrating a method for supplying power in an independent operation mode after the first breaker of the switchgear according to the embodiment of the present invention is opened.
  • FIG. 7 is a flowchart illustrating a method in which a control device of a power distribution panel according to an embodiment of the present invention processes a power receiving power reduction request of an upper system device.
  • FIG. 8 is a flowchart illustrating a method in which a control device of a switchgear according to an embodiment of the present invention processes the amount of power received by a power transaction fee of a higher system.
  • FIG. 9 is a flowchart illustrating a method of controlling the charging of an electric vehicle by the control apparatus of the switchboard according to an embodiment of the present invention.
  • FIG. 1 is a block diagram schematically illustrating a power supply system including a switchboard according to an embodiment of the present invention.
  • the power supply system 100 includes an upper system device 200, a distributed power generation device 300, an premises power load 400, and a switchboard 500.
  • the upper system apparatus 200 is connected to the switchboard 500 to trade power with the switchboard 500. That is, the upper system apparatus 200 may sell power to the switchgear 500 or purchase power from the switchgear 500.
  • the upper grid device 200 may be a facility operated by KEPCO or an overseas power company.
  • the distributed power generator 300 may include a distributed AC power generator 310, a distributed DC power generator 320, and an emergency power generator 330, and are connected to the switchboard 500.
  • the distributed power generation device 300 transmits the generated generated power to the switchboard 500.
  • Distributed AC power measurement device 310 is a device for generating a commercial power that is the same as the power supplied by the power company in the form of power generated.
  • the distributed DC power generator 320 is a generator in which a form of generated electric power is DC power.
  • the emergency power generation device 330 is a device that generates commercial power that is the same as the power supplied by a power company in the form of generated power, and may operate only in an emergency such as a fire.
  • the premises power load 400 includes an premises AC power load 410 and an premises DC power load 420.
  • the premises power load 400 is connected to the switchboard 500 receives the power from the switchboard 500.
  • the premises AC power load 410 receives commercial power from the switchboard 500, and the premises DC power load 420 receives DC power from the switchboard 500.
  • the switchboard 500 distributes the generated power received from the distributed AC power generator 310 and the emergency power generator 330 to the premises AC power load 410, and converts the remaining power into DC power so that the premises DC power load ( 420).
  • the switchboard 500 distributes the generated power received from the distributed DC power generator 320 to the premises DC power load 420, and converts the remaining power into the AC power to the premises AC power load 410.
  • the switchboard 500 may determine the required amount of power required in the premises power load 400.
  • the switchgear 500 is a higher-level grid device if the amount of power required in the premises power load 400 is less than the sum of the generated power transmitted from the distributed AC power generator 310 and distributed DC power generator 320 200 can be sold.
  • the switchboard 200 receives power from the upper system 200 when the amount of power required by the premises power load 400 is greater than the sum of generated power transmitted from the distributed AC power generator 310 and the distributed DC power generator 320. You can buy it.
  • FIG. 2 is a block diagram specifically illustrating a power supply system including a switchboard according to an embodiment of the present invention.
  • FIG. 3 is an exemplary view showing the interior of the switchboard shown in FIG. 2.
  • the switchboard according to the present invention may have a configuration different from that shown, and some components may be added, changed or deleted. Can be.
  • the power supply system 100 includes a grid system 210, a distributed power generator 300, an premises power load 400, and a power distribution panel 500.
  • the grid system 210 includes a higher grid device 200 and a grid gateway 220.
  • the upper grid device 200 connects with the switchboard 500 to trade power.
  • the upper system apparatus 200 may be connected to the switchboard 500 to sell power through the power line to the switchboard 500 or to purchase power from the switchboard 500 through the powerline.
  • the grid gateway 220 is connected to the switchboard 500 through a communication line to communicate with the switchboard 500.
  • the system gateway 220 may be applied to IEC 61850, the standard of substation automation technology.
  • the grid gateway 220 may be connected to the control device 540 through a communication line so as to request the power distribution panel 500 to reduce the amount of power received in the faucet or to increase the amount of power generated.
  • the grid gateway 220 connects to the upper grid apparatus 200 through a communication line.
  • the distributed power generator 300 transmits the generated power to the switchboard 500 through the power line.
  • the distributed power generator 300 may include a distributed AC power generator 310, a distributed DC power generator 320, and an emergency power generator 330.
  • the distributed AC power generator 310 transmits generated power to an AC booth 520 in the switchboard 500 through an AC power line.
  • the distributed AC power generator 310 is connected to the control device 540 through a communication line, and performs a command for increasing or decreasing the generated power from the control device 230.
  • the AC fuel generator 311 includes a gas engine generator, a diesel engine generator, and the like that require fuel.
  • AC fuel-free generator 312 is a generator that generates power using natural energy without fuel, and there are a wind generator, a hydro generator, a solar generator, and the like. At this time, the quantity of the distributed AC power generator 310 connected to the switchboard 500 is not limited.
  • the distributed DC power generator 320 transmits generated power to the DC booth 530 in the switchboard 500 through the DC power line.
  • the distributed DC power generator 320 is connected to the control device 540 through a communication line, and performs a command for increasing or decreasing the generated power from the control device 230.
  • the DC fuel generator 321 is a generator that requires fuel, and includes a gas engine generator and a fuel cell generator.
  • DC fuel-free generator 322 is a generator that generates power using natural energy without fuel, such as a solar generator. At this time, the quantity of the distributed DC power generator 320 connected to the switchboard 500 is not limited.
  • the emergency power generator 330 transmits the generated power to the AC booth 520 in the switchboard 500 through the AC power line.
  • the emergency power generation device 330 is connected to the control device 540 through a communication line.
  • the control device 540 may command the emergency power generation device 330 to increase or decrease the generation power when the request for generating the power generation increase or decrease is received from the system gateway 220 through the communication line.
  • the quantity of the emergency power generation device 330 connected to the switchboard 500 is not limited.
  • the distributed power generator 300 may increase the output by the command of the control device 540.
  • the generation order of increasing the output power is the alternating-current fuel generator 312 among the distributed AC power generators 310 and the distributed DC power generators.
  • the emergency power generation device 330 since the emergency power generation device 330 is impossible to operate at all times, it may operate only at the request of the upper system device 200.
  • the premises power load 400 includes an premises AC power load 410, an premises DC power load 420, and an premises electric vehicle charging terminal 430.
  • the premises AC power load 410 is connected to the AC booth 520 through a third circuit breaker 590 that can cut off the use of power and receives power from the AC booth 520.
  • the premises AC power load 410 is divided into the premises important AC power load 411 and the premises non-critical AC power load 412.
  • the important AC power load 411 in the premises is a load which may have a large influence such as production disruption on the power consumer when the supplied power is cut off, and may be preset.
  • the premises non-critical AC power load 412 is a load that does not significantly affect the power consumer even if the supplied power is cut off, and may be preset.
  • the important AC power loads 411 in the premises may be classified in order of high importance. In the embodiment of FIG.
  • the first premises critical AC power load 413 has the highest importance among the premises critical AC power loads 411, and the importance becomes lower toward the nth premises critical AC power load 414.
  • the premises non-critical AC power load 412 may be classified in the order of low importance.
  • the first non-critical AC power load 415 has the lowest importance among the non-critical AC power loads 412 of the premises, and the importance increases toward the non-critical AC power load 416 of the premises.
  • the premises DC power load 420 is connected to the DC booth 530 through a third circuit breaker 590 that can cut off the use of power and receives power from the DC booth 530.
  • the premises DC power load 420 is divided into the premises important DC power load 421 and the premises non-critical DC power load 422.
  • the important DC power load 421 in the premises is a load that may have a large influence such as a production disruption on the power consumer when the supplied power is cut off, and may be preset.
  • the premises non-critical DC power load 422 is a load that does not significantly affect the power consumer even if the supplied power is cut off, it may be set in advance.
  • the critical DC power loads 421 in the premises may be classified in order of high importance. In the embodiment of FIG.
  • the first premises important DC power load 423 has the highest importance among the premises important DC power loads 421 and becomes less important toward the nth premises important DC power load 424.
  • the premises non-critical DC power load 422 may be classified in the order of low importance.
  • the first premises non-critical DC power load 425 has the lowest importance among the premises non-critical DC power loads 422 and the importance increases toward the n-th premises non-critical DC power load 426.
  • the on-premises electric vehicle charging terminal 430 is a charging terminal connected through a DC booth 530 to charge an electric vehicle using power, and is connected to the DC booth 530 through a third circuit breaker 590 that can cut off power use. And receives power from the DC booth (530).
  • the electric vehicle charging terminal 430 may be classified according to the order of low importance. In the embodiment of FIG. 2, the first premises electric vehicle charging terminal 431 has the lowest importance among the premises electric vehicle charging terminals 430, and the importance increases toward the nth premises electric vehicle charging terminal 432.
  • the control device 540 may cut off the power supply to the premises power load 400, and the order of blocking is determined in descending order of importance.
  • the order of blocking is the first terminal electric vehicle charging terminal 431. ), ..., nth premises electric vehicle charging terminal 432, first premises non-critical DC power load 425, ..., nth premises non-critical DC power load 426, first premises non-critical
  • the AC power load 415 may be performed in order of the n-th premises non-critical AC power load 416.
  • the switchboard 500 includes a power converter 510, an AC booth 520, a DC booth 530, a control device 540, a first breaker 550, a transformer 560, a second breaker 570, and power storage. Device 580, third breaker 590, and meter 595.
  • the switchboard 500 shown in FIG. 1 is according to an embodiment, and the blocks shown in FIG. 1 are not all required components, and in other embodiments, some blocks may be added, changed, or deleted.
  • the power converter 510 is connected to the distributed power generator 300 and receives power to convert the power converter 510 into electric power that can be used in the premises power load 400. That is, the AC power supplied from the AC power supply is converted into DC power or the DC power supplied from the DC power supply is converted into AC power.
  • the AC power supply may include at least one of the upper grid device 200, the distributed AC power generator 310 and the emergency power generator 330, the DC power supply is a distributed DC power generator ( 320 and one or more power storage devices 580.
  • the power converter 510 may communicate with the distributed power generation device 300 through a communication line.
  • the AC booth 520 distributes the AC power supplied from the AC power supply and the power converter 510 to the AC power load 410 of the premises.
  • the "AC amount” refers to the power flowing from the upper side of the power converter 510, the power supplied from the upper system apparatus 200, the generated power of the distributed AC power generator 310, the emergency generator 330. ) Is defined as the sum of generated power.
  • the DC booth 530 distributes the DC power supplied from the DC power supply source and the power converter 510 to the premises DC power load 420.
  • the term “direct current amount” is defined as the sum of the generated power of the distributed DC power generator 320 and the output power of the power storage device 580 as power flowing to the secondary side of the power converter 510.
  • the DC booth 530 may be connected to the electric vehicle charging terminal 430 for charging the electric vehicle, and at this time, the control device 540 detects the charging of the electric vehicle through the electric vehicle charging terminal 430 The electric vehicle is controlled to charge only the chargeable amount by calculating the chargeable amount obtained by subtracting the current amount of power received from the preset maximum power received amount.
  • the control device 540 compares the required power amount of the premises DC power load 420 with the DC power supplied from the DC power supply source and the DC power supplied to the AC booth 520 and the DC power supplied to the DC booth 530. Control the power converter 510 to adjust. That is, the controller 540 converts AC power into DC power through the power converter 510 when the required power amount of the DC power load 420 of the premises is greater than the DC power supplied from the DC power supply source, and loads the DC power load of the premises. If the required power amount of 420 is smaller than the DC power supplied from the DC power supply source, the DC power may be converted into AC power through the power converter 510.
  • control device 540 receives a power receiving power reduction request or a power transaction fee unit price from the upper system device 200 to increase or decrease the output of the power storage device 580, or the distributed power generation device 300. ) Or increase or decrease the output of the non-critical AC power load 412 and the non-critical DC power load 413 in the premises sequentially from the low priority.
  • the control device 540 is a grid gateway 220, distributed power generation device 300, power converter 510, the first circuit breaker 550, transformer 560, the second circuit breaker 570, power storage through a communication line Communicate with device 580, third breaker 590, and meter 595.
  • the first circuit breaker 550 is a circuit breaker that automatically performs a closing or opening operation according to whether the upper system device 200 is broken. That is, the first circuit breaker 550 determines whether or not a failure occurs in the upper system device 200, and performs an opening operation when a failure occurs to electrically shut off the upper system device 200. After performing the opening operation, the independent information may be supplied to the control device 540 through the communication line to supply power to the power receiver using only the distributed power generator 300 and the power storage device 580 installed in the power receiver. Allows you to switch to mode. Then, the first circuit breaker 550 continuously determines whether to recover the failure of the upper grid device 200, and performs a closing operation during the failure recovery of the higher grid device 200 to be supplied from the higher grid device 200.
  • the input information is transmitted to the control device 540 through a communication line, so that the distributed power generator 300 and the power storage device 580 may supply power to the power receiver together with the upper system device 200. Allows you to switch to grid-connected operation mode.
  • the distributed power source installed in the power receiver also cannot generate power, but wastes power, but according to an embodiment of the present invention, a switchgear board According to the power supply system 100 including the upper system unit 200 when a failure occurs, the upper system unit 200 and the switchboard 500 is electrically separated by utilizing the distributed power generation device 300 in the power receiver It will continue to supply power.
  • the transformer 560 lowers the voltage of the power supplied from the upper grid device 200 to a voltage available to the on-premises AC power load 410. Since the voltage of the power supplied from the upper grid device 200 is high to be used by the general power customer, the transformer 560 lowers it so that it can be used by the general power customer.
  • the second circuit breaker 570 determines whether there is a failure of the secondary side of the transformer 560 under the control of the control device 540, and performs an opening operation in the event of a failure to electrically shut off the upper system device, and injecting operation in the recovery of the failure. Perform the input of the power supplied from the upper system device. Meanwhile, the second breaker 570 may communicate with the control device 540 through a communication line, and may receive an input or open command from the control device 540 and perform an input or open command.
  • the power storage device 580 compares the required power amount of the premises DC power load 420 with the generated power of the distributed DC power generator 320, and the required power amount of the premises DC power load 420 is distributed DC power generator ( When the amount of generated power is less than 320, the remaining DC power is stored. When the required amount of power of the premises DC power load 420 is greater than the amount of generated power of the distributed DC power generator 320, the stored power is output.
  • the power storage device 580 stores the power remaining in the usual time, and when the independent operation mode is set due to the failure of the upper system device 200, the power is generated due to the difference between the generation amount of the distributed power generation device 300 and the load capacity within the power capacity. When supply and demand imbalance occurs, it may be provided to provide stored power.
  • the power storage device 580 communicates with the control device 540 through a communication line, and may perform a charge or discharge command according to a charge or discharge command of the control device 540.
  • the third circuit breaker 590 receives the input or open command from the control device 540 to perform the input or open command to cut off or input power to the premises AC power load 410 or the premises DC power load 420.
  • the third circuit breaker 590 is connected to the premises AC power load 410 through the AC power line and is connected to the premises DC power load 420 through the DC power line.
  • the third circuit breaker 590 sequentially blocks the plurality of premises non-critical AC power loads and the plural premises non-critical DC power loads from low importance when receiving an opening command from the control device 540.
  • the meter 595 measures the amount of power that the switchgear 500 deals with the upper system device 200.
  • the meter 595 communicates with the control device 540 via a communication line.
  • FIG. 4 is a flowchart illustrating a method of controlling a power converter in a power processing method according to an embodiment of the present invention.
  • the method shown in FIG. 4 is one embodiment of a method corresponding to a method in which the control device 540 of the switchboard 500 controls the power converter 510 according to one embodiment of the present invention shown in FIGS. 2 and 3. Yes.
  • a required power amount of a premises DC power load and a DC power supplied from a DC power supply source are determined (S401), and compared (S402). At this time, if the required power amount of the premises DC power load is greater than the DC power supplied from the DC power supply source, converts the AC power of the transformer primary side to DC power through the power converter (S403), and if so, maintains the current state.
  • the required power amount of the premises DC power load is smaller than the amount of DC power supplied from the DC power supply source, the DC power of the transformer secondary side is converted into AC power through the power converter (S405).
  • FIG. 5 is a flowchart illustrating a method of controlling the first breaker in the power processing method according to an embodiment of the present invention.
  • FIGS. 5 is an embodiment of a method corresponding to the method of controlling the first breaker 550 of the switchboard 500 according to the embodiment of the present invention shown in FIGS. 2 and 3.
  • an upper system apparatus is monitored (S501). And it is determined whether a power failure occurs due to a failure of the upper system device (S502). If so, the first circuit breaker is opened (S503) to electrically disconnect the upper grid device and the distribution panel, or the monitoring of the higher grid device (S501) is continued. Then, the first breaker open state is transmitted to the control device (S504).
  • the control apparatus is set to an independent operation mode capable of supplying power to the power receiver using only the distributed power generator and the power storage device installed in the power receiver (S505).
  • the monitoring of the upper grid device is performed again (S506), and it is determined whether the power failure has been restored (S507), and if restored, the first breaker is inserted (S508) to re-input the power supplied from the higher grid device. . Then, the first breaker input state is transmitted to the control device (S509), and the control device is set to the grid-connected operation mode in which the distributed power generator and the power storage device can supply power to the power consumer together with the upper grid device. (S510).
  • FIG. 6 is a flowchart illustrating a method for supplying power in an independent operation mode after the first breaker of the switchgear according to the embodiment of the present invention is opened.
  • the independent operation mode is started, and the frequency of the secondary side of the first circuit breaker is determined (S602), and this is compared with the reference frequency (S603).
  • the reference frequency is a frequency for confirming whether or not the power of the secondary side of the first circuit breaker can be fully supplied to the load in the current power receiver.
  • the power storage device checks whether the power can be stored (S604), and if power storage is possible, gives a power storage command to the power storage device (S605). When the power storage device is unable to store power, the power storage device issues an output reduction command (S606).
  • step S602 determines the secondary frequency of the first circuit breaker again.
  • FIG. 7 is a flowchart illustrating a method in which a control device of a power distribution panel according to an embodiment of the present invention processes a power receiving power reduction request of an upper system device.
  • the higher level system device may request reduction of power reception power when power consumption increases rapidly.
  • FIG. 7 illustrates an embodiment of how the control device of the distribution panel handles power reception power reduction request in this case.
  • the upper system device requests the reduction of power reception power (S701)
  • a breakable premises non-critical power load S702
  • the premises non-critical power load is a non-critical AC power load, a non-critical DC power load.
  • an electric vehicle charging terminal If there is a breakable off-premises non-critical power load, the off-premises non-critical power load is blocked in the blocking order (S703).
  • Shutdown order is the first premises electric vehicle charging terminal, ..., the nth premises electric vehicle charging terminal, the first premises non-critical DC power load, ..., the n premises non-critical DC power load, the first premises non-critical AC power load, ..., n-th premises Non-critical AC power load can be in order.
  • the blocking is performed by the third breaker.
  • the output is increased in the order of increasing the output of the distributed power generator (S704).
  • the order of output increase is that of AC AC fuel generator among distributed AC power generators, DC fuel generator among distributed DC power generators, AC fuel generator among distributed AC power generators, DC fuel generator among distributed DC power generators, emergency power generators. You can do it in order.
  • step S705 After cutting off the non-critical power load in the premises or increasing the output of the distributed power generator, it is checked whether the requirements of the upper grid device are satisfied (S705). If not satisfied, go to step S702 to check whether there is a non-critical load that can be cut off again, and if satisfied, wait for a command of the upper system device (S706). If it is determined that the request to reduce the amount of power of the upper grid unit is canceled (S707), if it is not canceled, the instruction waits for the command of the upper grid unit again (S706). (S708).
  • FIG. 8 is a flowchart illustrating a method in which a control device of a switchgear according to an embodiment of the present invention processes the amount of power received by a power transaction fee of a higher system.
  • the control device may receive a power transaction fee unit price from an upper system device and perform a process such as reducing the amount of power received when a charge bomb is expected.
  • FIG. 8 is an embodiment thereof.
  • the control device receives the power transaction fee unit price from the upper system apparatus (S801), it is determined whether the amount of received power is required based on the power transaction fee unit price (S802). In one embodiment, it may be determined that the amount of power received by the faucet is required if the estimated fee exceeds the reference fee. If it is determined in step S802 that the amount of received power is required, the required blocking load amount is calculated (S803). In other words, calculate how much load can be achieved to achieve the desired amount of power received.
  • the output is increased in accordance with the output increase order of the distributed power generator by the required breaking load (S806).
  • step S807 After cutting off the non-critical power load in the premises or increasing the output of the distributed power generator, it is checked whether the amount of received power is reduced to a target value (S807). If not satisfied, go to step S803 to calculate the required blocking load again, and if satisfied, the power transaction fee unit price is received from the upper system device (S808). If it is possible to increase the amount of incoming power (S809), if it is impossible, the unit receives the power transaction fee unit price from the upper system device again (S808). (S810).
  • FIG. 9 is a flowchart illustrating a method of controlling the charging of an electric vehicle by the control apparatus of the switchboard according to an embodiment of the present invention.
  • the control device detects charging of an electric vehicle (S901). Then, the amount of power received is determined (S902) to calculate the chargeable amount (S903).
  • the chargeable amount may be set to a value obtained by subtracting the current amount of power received from a preset maximum amount of power received.
  • the control device controls the electric vehicle to charge only the chargeable amount, and the control process is as follows. First, check whether the chargeable amount is greater than 0 (S904). If the chargeable amount is greater than 0, only the chargeable amount is charged (S905). If the chargeable amount is 0 or less, the battery waits until a preset time elapses (S906). ). If the charging is completed (S907) and the charging is completed, the charging of the electric vehicle is terminated. If the charging is not completed, the process returns to step S902 to determine the current amount of power received again.
  • the power processing method according to the embodiment of the present invention may be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium.
  • Computer-readable media may include, alone or in combination with the program instructions, data files, data structures, and the like.
  • the program instructions recorded on the computer readable medium may be those specially designed and constructed for the present invention, or may be known and available to those skilled in the computer software arts.
  • Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks.
  • Hardware devices specially configured to store and execute program instructions such as magneto-optical media and ROM, RAM, flash memory and the like.
  • the above-described medium may be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, and the like.
  • Examples of program instructions may include high-level language code that can be executed by a computer using an interpreter as well as machine code such as produced by a compiler.
  • the hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

La présente invention a trait à un dispositif de commutation et à un procédé de gestion d'énergie utilisant celui-ci. Le dispositif de commutation selon la présente invention inclut : un convertisseur de puissance permettant de convertir une alimentation en courant alternatif qui est fournie à partir d'un bloc d'alimentation en courant alternatif en une alimentation en courant continu, ou une alimentation en courant continu qui est fournie à partir d'un bloc d'alimentation en courant continu en une alimentation en courant alternatif ; une cabine de courant alternatif permettant de distribuer l'alimentation en courant alternatif qui est fournie à partir du bloc d'alimentation en courant alternatif et du convertisseur de puissance dans un facteur de charge de courant alternatif sur le terrain ; une cabine de courant continu permettant de distribuer l'alimentation en courant continu qui est fournie à partir du bloc d'alimentation en courant continu et du convertisseur de puissance dans un facteur de charge de courant continu sur le terrain ; et un dispositif de commande permettant de comparer une quantité d'énergie requise pour le facteur de charge de courant continu sur le terrain et la quantité d'alimentation en courant continu qui est fournie à partir du bloc d'alimentation en courant continu et de contrôler le convertisseur de puissance afin d'ajuster l'alimentation en courant alternatif qui est fournie à la cabine de courant alternatif et l'alimentation en courant continu qui est fournie à la cabine de courant continu.
PCT/KR2011/004766 2011-06-29 2011-06-29 Dispositif de commutation et procédé de gestion d'énergie utilisant celui-ci Ceased WO2013002438A1 (fr)

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CN108092350A (zh) * 2016-11-23 2018-05-29 比亚迪股份有限公司 移动电站及其控制方法和控制系统
WO2019172519A1 (fr) * 2018-03-09 2019-09-12 엘에스산전 주식회사 Système d'analyse d'un système de disjoncteurs dans un tableau de distribution au moyen d'une communication par ligne électrique
CN112689937A (zh) * 2018-09-13 2021-04-20 Ls电气株式会社 电源供应系统
EP4216392A1 (fr) * 2022-01-24 2023-07-26 Abb Schweiz Ag Système de conversion d'alimentation
EP4216391A1 (fr) * 2022-01-24 2023-07-26 Abb Schweiz Ag Système de conversion d'alimentation

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KR101516802B1 (ko) * 2014-05-16 2015-05-04 케이씨코트렐 주식회사 독립형 마이크로그리드용 배전반
KR102472189B1 (ko) 2022-05-31 2022-11-29 주식회사 근우 딥러닝 기반의 전력관리가 가능한 수배전반

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JP2004265778A (ja) * 2003-03-03 2004-09-24 Japan Research Institute Ltd 電力供給システム、及び燃料電池ユニット
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Publication number Priority date Publication date Assignee Title
CN108092350A (zh) * 2016-11-23 2018-05-29 比亚迪股份有限公司 移动电站及其控制方法和控制系统
CN108092350B (zh) * 2016-11-23 2021-02-23 比亚迪股份有限公司 移动电站及其控制方法和控制系统
WO2019172519A1 (fr) * 2018-03-09 2019-09-12 엘에스산전 주식회사 Système d'analyse d'un système de disjoncteurs dans un tableau de distribution au moyen d'une communication par ligne électrique
CN112689937A (zh) * 2018-09-13 2021-04-20 Ls电气株式会社 电源供应系统
EP4216392A1 (fr) * 2022-01-24 2023-07-26 Abb Schweiz Ag Système de conversion d'alimentation
EP4216391A1 (fr) * 2022-01-24 2023-07-26 Abb Schweiz Ag Système de conversion d'alimentation
WO2023138915A1 (fr) * 2022-01-24 2023-07-27 Abb Schweiz Ag Système de conversion de puissance
WO2023138965A1 (fr) * 2022-01-24 2023-07-27 Abb Schweiz Ag Système de conversion électrique

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