WO2020040350A1 - New renewable energy hybrid power-generation system and power-generation method therefor - Google Patents

New renewable energy hybrid power-generation system and power-generation method therefor Download PDF

Info

Publication number
WO2020040350A1
WO2020040350A1 PCT/KR2018/012579 KR2018012579W WO2020040350A1 WO 2020040350 A1 WO2020040350 A1 WO 2020040350A1 KR 2018012579 W KR2018012579 W KR 2018012579W WO 2020040350 A1 WO2020040350 A1 WO 2020040350A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
fuel cell
renewable energy
bess
unit
Prior art date
Application number
PCT/KR2018/012579
Other languages
French (fr)
Korean (ko)
Inventor
이상현
김민석
전희권
Original Assignee
에스퓨얼셀 주식회사
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 에스퓨얼셀 주식회사 filed Critical 에스퓨얼셀 주식회사
Publication of WO2020040350A1 publication Critical patent/WO2020040350A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M16/00—Structural combinations of different types of electrochemical generators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
    • H01M8/04858—Electric variables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
    • H01M8/0606—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants
    • H01M8/0656—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants by electrochemical means
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/40—Combination of fuel cells with other energy production systems
    • H01M2250/402—Combination of fuel cell with other electric 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/30—The power source being a fuel cell
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/10—Applications of fuel cells in buildings
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the present invention relates to a renewable energy hybrid power generation system and a renewable energy hybrid power generation method therefor.
  • the renewable energy generation device (RG) in the mountainous region is not only to promote the use of renewable energy, but also has the advantage of reducing the cost burden of the power generation equipment is increasing the interest.
  • the energy storage system storing the renewable energy generators and the generated electricity (energy) storage system (ESS) should be used interchangeably.
  • An object of the present invention is to provide a fuel cell system together with a renewable energy generation device (RG) and an energy storage device (ESS), while reducing the cost of a facility, and capable of immediately responding to instantaneous loads, and a power generation system for the same. To provide a method.
  • RG renewable energy generation device
  • ESS energy storage device
  • a power supply bus unit to which a renewable energy generation device RG, a fuel cell system FC, and a battery energy storage device BESS are individually connected as a power source; And a power converter (PCS) connected to the power bus unit and controlling power so that power supplied from the power bus unit is supplied to at least one load.
  • PCS power converter
  • the fuel cell system FC provides a renewable energy hybrid power generation system having at least two fuel cell modules that are operated individually.
  • the present invention provides a power generation method using the renewable energy hybrid power generation system.
  • the renewable energy hybrid power generation system includes a renewable energy generation device (RG), a fuel cell system (FC) and a battery energy storage device (BESS) is low and instantaneous equipment cost for increasing the capacity of the energy storage system Not only can it respond immediately to load changes, but also has the advantage of improving the slow generation speed according to the load tracking speed through unit modularization of the fuel cell system, and has the advantage of improving the life by lowering the discharge amount of the battery. .
  • RG renewable energy generation device
  • FC fuel cell system
  • BESS battery energy storage device
  • FIG. 1 is a graph showing a difference in power generation amount according to a fuel cell system FC provided in a renewable energy hybrid power generation system, (a) shows a case where the fuel cell system FC is a single fuel cell module, (b) shows a case where the fuel cell system FC is a plurality of unit cell fuel modules.
  • Figure 2 is a schematic diagram showing the configuration of a renewable energy hybrid power generation system according to the present invention.
  • Figure 3 is a schematic circuit diagram (a) of the individual power supply of the renewable energy hybrid power generation system according to the present invention and a graph (b) showing the voltage and power change with time of the individual power supply in the instantaneous load change.
  • FIG. 4 is a schematic view showing a configuration of a fuel cell module according to the present invention.
  • Figure 5 is a schematic diagram showing the control mode of the individual power supply during operation of the renewable energy hybrid power generation system according to the present invention.
  • FIG. 6 is a flowchart illustrating a control process of the fuel cell system FC according to the state of charge SOC of the battery energy storage device BESS.
  • the terms "comprises” or “having” are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.
  • the "load” is an individual consuming power supplied from a renewable energy generator (RG), a fuel cell system (FC), a battery energy storage device (BESS), etc., and may be, for example, a home, a factory, or the like.
  • the power supplied to the load may have a voltage / frequency condition commonly used in homes or factories.
  • the power supplied to the load may have a voltage of 380 / 220V and a frequency of 60 Hz.
  • rated voltage means a reference voltage to be supplied to maintain the normal operation of the load.
  • the present invention relates to a hybrid power generation system and a power generation method for the same.
  • a renewable energy generation device and an energy storage device for storing the generated electricity (energy) storage system (ESS) is being used in a mixed form.
  • the present invention provides a renewable energy hybrid power generation system and a power generation method therefor.
  • the renewable energy hybrid power generation system includes a renewable energy generation device (RG), a fuel cell system (FC) and a battery energy storage device (BESS) is low and instantaneous equipment cost for increasing the capacity of the energy storage system Not only can it respond immediately to load changes, but also has the advantage of improving the slow generation speed according to the load tracking speed through unit modularization of the fuel cell system, and has the advantage of improving the life by lowering the discharge amount of the battery. .
  • RG renewable energy generation device
  • FC fuel cell system
  • BESS battery energy storage device
  • a power supply bus unit to which a renewable energy generation device RG, a fuel cell system FC, and a battery energy storage device BESS are individually connected as a power source; And a power converter (PCS) connected to the power bus unit and controlling power so that power supplied from the power bus unit is supplied to at least one load.
  • PCS power converter
  • the fuel cell system FC provides a renewable energy hybrid power generation system having at least two fuel cell modules that are operated individually.
  • the renewable energy hybrid power generation system includes a power bus unit for supplying power and a power converter (PCS) connected to the power bus unit for converting power supplied from the power bus unit to be supplied to at least one load. do.
  • PCS power converter
  • the fuel cell system FC may include a fuel cell module in which a fuel cell is modularized.
  • the fuel cell unit provided in the fuel cell module has a lower tracking speed corresponding to the load than the battery of the battery energy storage device (BESS), and the output change due to the sudden load change may adversely affect the fuel cell stack life.
  • BESS battery energy storage device
  • the present invention includes a plurality of fuel cell modules in which a fuel cell is modularized in a fuel cell system FC so as to correspond to the total load, and thus, the load tracking speed of the fuel cell system FC is fueled as shown in FIG. 1.
  • the load response performance of the fuel cell system can be improved by proportionalizing the number of battery modules, and at the same time, the battery life is reduced by reducing the depth of discharge (DOD) of the battery of the battery energy storage device (BESS). It is effective to prolong.
  • the number of fuel cell modules provided in the fuel cell system may be 2 to 100, more specifically 5 to 90, 10 to 50, 50 to 100, 2 to 80, 2 to 60, It may be 2 to 40, 2 to 20, 2 to 10, 5 to 15, 5 to 10, or 2 to 5.
  • the fuel cell system FC according to the present invention includes 10 fuel cell modules that produce 2 kW of power instead of one fuel cell that produces 20 kW of power, producing the same power faster. can do.
  • the fuel cell system FC may have a configuration in which a plurality of fuel cell modules are connected in parallel in order to expand output power and to facilitate maintenance when a failure occurs.
  • FIG. 2 is an image showing a renewable energy hybrid power generation system according to the present invention.
  • each configuration of the renewable energy hybrid power generation system will be described in more detail with reference to FIG. 2.
  • the power bus unit has a configuration including a renewable energy generation device (RG), a fuel cell system, a battery energy storage system (BESS) independently operated.
  • the present invention is provided with a renewable energy generation device (RG), a fuel cell system (FC) and a battery energy storage device (BESS) as individual power supplies in the power bus unit, as well as to reduce the cost of installing the power generation equipment as well as night / Even when the renewable energy generation device RG is not operated due to a change in environmental conditions over time, such as a change in daytime, power can be supplied constantly.
  • the form of the power bus is not particularly limited, but may be a direct current bus (DC-BUS) type in terms of energy efficiency.
  • DC-BUS unlike alternating current bus (AC-BUS), has no problems with system stability, frequency synchronization, and reactive power, but it can also be applied to DC power systems such as solar, wind and fuel cells. It can be applied without secondary power conversion, which is efficient in terms of energy.
  • the power bus unit is configured to automatically operate according to the output reference voltage difference of each power source, that is, the potential difference in output between power sources, an autonomous control method that does not transmit or receive information between power sources can be used.
  • the power bus unit may be set such that the output reference voltage of each power source satisfies the condition of Equation 1.
  • the power supplies according to the present invention are set to an output reference voltage that satisfies Equation 1, and thus, the power supply is controlled by a droop control scheme for lowering the output voltage according to the active power / reactive power generated between the power bus portion and the load.
  • the driving sequence may have an operation sequence according to the output reference voltage set according to the voltage of the bus unit, and each power source may be automatically operated independently according to the operation sequence.
  • the droop control has an advantage of high reliability since it can automatically control each power source without any connection or separate control between each power source and the power converter (PCS):
  • V RG is the output reference voltage of the renewable energy generator (RG)
  • V FC is the output reference of the fuel cell system (FC)
  • V BESS is the output reference of the battery energy storage (BESS).
  • the output reference voltage for each power source has the highest output reference voltage V RG of the renewable energy generation device RG, as shown in Equation 1, and then the fuel cell system V FC and the battery energy storage device V BESS. ), The output reference voltage may be high.
  • the present invention controls the output reference voltage of each power supply in the order described above, when the output of the power bus unit is required due to the load generation, the configuration that is automatically fed and operated in the order of the power supply output voltage in accordance with the voltage of the power bus unit Has
  • the renewable energy hybrid system of the present invention when the output of the power bus unit is required due to a load generation, the power battery energy storage device BESS having a high load response speed is first operated, and the operated battery energy storage device BESS is operated. Before the state of charge SOC is lowered below the set value, as shown in FIG. 3, the renewable energy generator RG having the highest output reference voltage may be fed and operated.
  • the fuel cell system FC may be additionally fed and operated.
  • the battery energy storage is performed.
  • the device BESS can additionally be fed in and run.
  • the present invention is based on the output power of each power source set before the battery energy storage device (BESS) with a fast response speed corresponding to the occurrence of the load, but before the state of charge (SOC) of the battery energy storage device (BESS) is out of the set level. Having the operating sequence in the order of the highest voltage can minimize the use of the battery energy storage device (BESS) to maintain the state of charge (SOC) to the maximum, thereby improving the capacity and life problems of the battery energy storage device (BESS). .
  • each power supply is an output reference voltage of 100V to 1,000V, more specifically 100V to 9000V, 100V to 800V, 100V to 700V, 100V to 600V, 100V to 500V, 100V to 400V ⁇ 100V to 300V, 200V to 1,000V , 400V to 1,000V, 600V to 1,000V, 800V to 1,000V, 200V to 700V, 400V to 600V ⁇ 500V to 800V or 300V to 500V, the range can be set to the renewable energy hybrid generator It can be properly adjusted according to the design conditions.
  • the renewable energy generator RG does not include a separate control unit as a non-controlled power supply, and may be independently operated according to the voltage of the power bus unit based on the set output reference voltage. .
  • the renewable energy generator (RG) may be applied without particular limitation, unless it is a power generation system using fossil fuel or nuclear power.
  • the renewable energy generator (RG) is selected from the group consisting of a solar generator, a solar generator, a wind generator, a hydro generator, a piezoelectric energy block system of a staircase, a regenerative braking energy system of an electric motor, a geothermal generator and an tidal generator. It may include one or more kinds.
  • the renewable energy generation device RG may include a solar generator and a wind generator together, and in some cases, may include two or more solar generators.
  • the operation time of the renewable energy generation device (RG) can be controlled according to its type, and the environmental conditions in which the device is installed, such as weather, sunshine, temperature, air volume, and location conditions (hardness / latitude or altitude) of the installed point Etc.), of course, the amount of power generation may be affected by the change of time such as night / day.
  • the fuel cell system FC includes a plurality of fuel cell modules in which a fuel cell is modularized as described above, wherein each of the fuel cell modules is illustrated in FIG. 4.
  • RG renewable energy generator
  • PV photovoltaic cell
  • a hydrogen (H 2 ) storage unit for storing hydrogen (H 2 ) generated in connection with the hydrolysis unit;
  • a fuel cell unit including a stack connected to a hydrogen storage unit (H 2 ) to receive stored hydrogen (H 2 ) and to generate electric power and ultrapure water from the supplied hydrogen (H 2 );
  • It may include a water supply unit for supplying the ultra-pure water generated in connection with the fuel cell unit to the electrolytic cell of the water receiving section.
  • the fuel cell module according to the present invention electrolyzes the ultrapure water of the electrolytic cell with the power supplied from the renewable energy generation device RG separately installed in addition to the renewable energy generation device RG connected to the power bus unit to generate hydrogen (H 2 ).
  • the hydrogen (H 2 ) is generated and stored in the hydrogen (H 2 ) storage and power is supplied to the load, the hydrogen (H 2 ) is supplied to the fuel cell to supply power and ultrapure water from the stack of the fuel cell. You can switch.
  • the electrolyzed water in the electrolytic cell may be ultrapure water such as purified water (DI water) for generating only hydrogen (H 2 ) and oxygen (O 2 ) purely during electrolysis, and the ultrapure water has a conductivity of 10 us / cm or less, specifically 1-10 us / cm.
  • the reaction water generated in the battery stack of the fuel cell unit using hydrogen (H 2 ) supplied from the hydrogen (H 2 ) storage unit is generated by reacting pure hydrogen (H 2 ) with oxygen (O 2 ) in the air. Therefore, the conductivity may be ultra pure water of 10 us / cm or less.
  • the fuel cell module may include a water supply unit connected to the fuel cell unit and supplying ultrapure water generated in the stack of the fuel cell unit to the electrolytic cell of the hydrolysis unit.
  • a water supply unit connected to the fuel cell unit and supplying ultrapure water generated in the stack of the fuel cell unit to the electrolytic cell of the hydrolysis unit.
  • the electrolytic cell may maximize the hydrogen (H 2) production efficiency when using hydrogen (H 2) generated when, a high-temperature ultra-pure water.
  • the present invention may further include a configuration for collecting (heating) the waste heat generated in the stack when the power generation of the fuel cell module to increase the electrolytic cell temperature of the fuel cell unit containing ultrapure water to deliver to the electrolytic cell.
  • the fuel cell module may include a heat collecting unit configured to collect waste heat generated from the fuel cell unit; And it may further include a heat exchanger for transferring the heat source of the heat collecting portion to the electrolytic cell of the receiving portion by heat exchange.
  • the fuel cell module effectively collects waste heat generated from the fuel cell unit by providing a heat collecting unit and a heat exchanger to the electrolytic cell to efficiently heat the ultrapure water of the electrolytic cell without consuming extra energy (or power), and to produce hydrogen. Since the preparation time for heating the electrolyzer is not required, the hydrogen production efficiency is increased.
  • the temperature of the electrolytic cell may be 50 °C to 90 °C, specifically 50 °C to 80 °C, 60 °C to 90 °C, 60 °C to 80 °C, 55 °C to 75 °C, 50 °C to 65 °C, 65 °C To 90 ° C or 65 ° C to 75 ° C.
  • the fuel cell system FC may be independently controlled by an energy management system (EMS).
  • the control unit EMS is connected to the power bus unit as shown in FIG. 5 to receive the electric power P L required by the load when a load occurs, and at the same time, each amount of power of the renewable energy generation device RG. (P RG , P W and / or P PV ), the power amount P FC of the fuel cell system FC and the volume amount V H2 of stored hydrogen H 2 , and the power amount of the battery energy storage device BESS.
  • the P ESS and the state of charge SOC may be measured and / or received.
  • the controller EMS is a second power source to follow a state of charge (SOC) reference value of a battery energy storage device (BESS) that is set including a proportional integral controller (PI controller), a proportional integral differential controller (PID controller), and the like. Operation of the fuel cell system can be controlled. For example, as shown in FIG. 6, the controller EMS may determine the state of charge of the system received from the battery energy storage device BESS when the SOC reference value (85% or more) of the battery energy storage device BESS is set. If the SOC and / or battery capacity is lower than the set SOC threshold ( ⁇ 85%), the BESS will be proportional to follow the SOC threshold.
  • SOC state of charge
  • BESS battery energy storage device
  • the controller EMS may determine the state of charge of the system received from the battery energy storage device BESS when the SOC reference value (85% or more) of the battery energy storage device BESS is set. If the SOC and / or battery capacity is lower than the set SOC threshold ( ⁇ 85%), the BESS will be proportional
  • the PI controller can be used to turn on the fuel cell system FC, where the operating amount of the fuel cell system FC is determined by the state of charge (SOC) of the system received from the battery energy storage device (BESS).
  • SOC state of charge
  • BESS battery energy storage device
  • the controller EMS may perform overcharge, overdischarge, overcurrent, cell balancing, SOC, and aging state (SOH) from information received from a third power source (for example, power amount, voltage, current, and cell temperature).
  • a protection circuit for performing each function according to a control signal of the microcomputer.
  • the battery energy storage system stores the power supplied from the renewable energy generation device (RG) including a photovoltaic power generation system, a wind power generation system, the voltage of the power bus unit battery
  • the renewable energy generation device including a photovoltaic power generation system, a wind power generation system, the voltage of the power bus unit battery
  • the type of the battery energy storage device is not particularly limited, and in detail, a high-capacity nickel-cadmium secondary battery, a lithium ion secondary battery, and lithium for storing electric power supplied from the renewable energy storage device (RG).
  • the battery energy storage device (BESS) provides the stored power without a separate power production operation when the power is supplied to the load, the most response speed to sudden load changes such as overload or peak load among the power connected to the power bus bus Has fast features.
  • the response speed is high when the load is changed by using the battery energy storage device (BESS), but the capacity and life of the system are shortened rapidly due to frequent discharge of the battery energy storage device (BESS).
  • the present invention is to maximize the state of charge (SOC) of the battery in consideration of the costs incurred by the installation and / or replacement of the battery energy storage device (BESS), the battery energy when the instantaneous load occurs Even if the storage device BESS is activated first, the SOC of the battery energy storage device BESS may be at a certain level, for example, 80% or more, specifically 85% or more, 86% or more, 88% or 90%.
  • the reference value is set to maintain the abnormality, and the output energy of the renewable energy storage device RG and the fuel storage system FC having a low output reference voltage before the SOC of the battery energy storage device BESS is out of the set reference value.
  • the operation has a configuration that operates sequentially.
  • the battery energy storage device BESS when the battery energy storage device BESS supplies power according to an instantaneous load change, the battery energy storage device BESS is preferentially supplied with a charge state of the battery energy storage device BESS. May be operated so that power is supplied sequentially from the renewable energy generation device RG and the fuel cell system FC before it falls below 80%.
  • the present invention can increase the capacity and life of the battery by maintaining the state of charge (SOC) of the battery energy storage device (BESS) at the same level.
  • the battery energy storage device BESS may further include a battery management system (BMS) for battery system management.
  • BMS battery management system
  • the battery controller BMS primarily controls and maintains the voltage of the power bus unit, that is, the reference voltage, and maintains the state of charge SOC of the battery energy storage device BESS at a predetermined level. Control the charging state SOC of the battery energy storage device BESS, that is, the charging power amount and the discharge power amount or the battery capacity through the power charging of the battery energy storage device BESS when the new renewable hybrid power generation device operates. It can serve as a regular transmission.
  • the power conversion system may be positioned between the power bus unit and the load to convert power so that the power supplied from the power bus unit is supplied to one or more loads.
  • the power converter may be connected to the power bus unit to convert the power supplied from the power bus unit from DC to AC to supply one or more loads.
  • the power converter PCS may be set such that an output reference voltage satisfies Equation 2:
  • V RG is the output reference voltage of the renewable energy generator (RG)
  • V FC is the output reference voltage of the fuel cell system (FC)
  • V PCS is the output reference of the power converter (PCS).
  • the output reference voltage of the power converter (PCS) is greater than the output reference voltage of the fuel cell system (FC) so as to satisfy the condition of Equation 2, and is less than or equal to the output reference voltage of the renewable energy generator (RG).
  • the charging state SOC of the battery can be easily controlled by increasing the charging efficiency of the battery energy storage device BESS.
  • the renewable energy hybrid power generation system is a supercapacitor as a separate power source in addition to the renewable energy generation device RG, the fuel cell system FC and the battery energy storage system BESS.
  • (super capacitor, SC) may further include.
  • the supercapacitor SC can respond quickly to changes in the load of several seconds to several minutes. Therefore, when the supercapacitor SC is included as an individual power source of the power bus unit, but the output reference voltage of the supercapacitor SC is set equal to or higher than that of the fuel cell system FC, the load is earlier than the battery energy storage device BESS.
  • the battery life can be extended by reducing the battery discharge amount (DOD) of the battery energy storage device (BESS), and the stability of the renewable energy generation system is advantageous.
  • DOD battery discharge amount
  • the present invention provides a power generation method using the renewable renewable power generation system according to the present invention.
  • Renewable hybrid power generation method using a renewable energy generator (RG), a fuel cell system (FC) and a battery energy storage device (BESS) is a low equipment cost and instantaneous load for increasing the capacity of the energy storage system Not only can it immediately respond to changes, it is also excellent in the effect of improving the slow generation speed according to the load tracking speed through the modular unit of the fuel cell system, and has the advantage of improving the life by lowering the discharge amount of the battery.
  • RG renewable energy generator
  • FC fuel cell system
  • BESS battery energy storage device
  • the renewable energy hybrid power generation system includes a renewable energy generation device (RG), a fuel cell system (FC) and a battery energy storage device (BESS) is low and instantaneous equipment cost for increasing the capacity of the energy storage system Not only can it respond immediately to load changes, but also has the advantage of improving the slow generation speed according to the load tracking speed through unit modularization of the fuel cell system, and has the advantage of improving the life by lowering the discharge amount of the battery. .
  • RG renewable energy generation device
  • FC fuel cell system
  • BESS battery energy storage device

Landscapes

  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Fuel Cell (AREA)

Abstract

The present invention relates to a new renewable energy hybrid power-generation system and a power-generation method therefor. The power-generation system comprises a renewable-energy power generator (RG), a fuel cell system (FC), and a battery energy storage system (BESS). Therefore, the power-generation system can reduce facility cost required to increase capacity of an energy storage system, can immediately respond to an instantaneous load change, and has excellent effects of: improving a slow power-generation speed according to a load-following speed through the unit modularization of the fuel cell system; and reducing a discharged amount of a battery to improve the life thereof.

Description

신재생 에너지 하이브리드 발전 시스템 및 이를 위한 발전 방법Renewable Energy Hybrid Power Generation System and Power Generation Method Therefor
본 발명은 신재생 에너지 하이브리드 발전 시스템 및 이를 위한 신재생 에너지 하이브리드 발전 방법에 관한 것이다.The present invention relates to a renewable energy hybrid power generation system and a renewable energy hybrid power generation method therefor.
중앙 집중식 방식의 대규모 화석 연료의 발전을 줄이고 신재생 에너지 사용의 확대를 위하여 태양광이나 풍력 등을 이용한 발전 및 연료 전지 등의 신재생 에너지를 기반으로 하는 발전 시스템에 대한 연구가 활발히 진행되고 있으며, 특히 도서산간 지역에서의 재생 에너지 발전 장치(RG)은 신재생 에너지의 사용을 촉진시킬 뿐만 아니라 발전 설비의 비용 부담을 줄이는 이점이 있어 그 관심이 높아지고 있다.In order to reduce the generation of centralized large-scale fossil fuels and expand the use of renewable energy, research is being actively conducted on power generation systems based on renewable energy such as fuel cells and solar power or wind power. In particular, the renewable energy generation device (RG) in the mountainous region is not only to promote the use of renewable energy, but also has the advantage of reducing the cost burden of the power generation equipment is increasing the interest.
이러한 재생 에너지 발전 장치는 에너지 밀도가 낮은 자연 에너지를 이용하여 발전되는 신재생 에너지가 불규칙적이므로, 전력 수요에 따라 효율적으로 전력을 공급하기 위해서는 재생 에너지 발전 장치와 발전된 전기를 저장하는 에너지 저장 시스템(energy storage system, ESS)이 혼용하는 형태로 이용되어야 한다.Since the renewable energy generators are irregular renewable energy generated by using low energy density natural energy, in order to supply power efficiently according to the power demand, the energy storage system storing the renewable energy generators and the generated electricity (energy) storage system (ESS) should be used interchangeably.
그러나 이러한 발전 시스템은 재생 에너지 발전 장치가 가동되지 않을 때 충분한 전력을 공급하기 위하여 에너지 저장 시스템(ESS)의 용량이 커야 하므로 이를 위한 설비 비용이 높은 한계가 있다. 또한, 상기 문제를 보완하기 위하여 하이브리드 발전 시스템에 연료 전지 시스템(FC)을 혼용하는 경우 설비 비용은 절감할 수 있으나, 순시적인 부하에 대한 연료 전지의 동적 응답 특성이 느려 과부하나 피크부하에 충분히 대응하기 어려운 한계가 있다.However, such a power generation system has a high installation cost for this because the capacity of the energy storage system (ESS) must be large in order to supply sufficient power when the renewable energy generation device is not operating. In addition, when the fuel cell system (FC) is used in a hybrid power generation system to reduce the above-mentioned problems, the installation cost can be reduced, but the dynamic response characteristics of the fuel cell to instantaneous loads are slow so that they sufficiently cope with overload or peak load. There is a limit that is difficult to do.
본 발명의 목적은 재생 에너지 발전 장치(RG) 및 에너지 저장장치(ESS)와 함께 연료 전지 시스템을 구비하여 설비 비용을 절감하는 한편, 순시적인 부하에 대한 즉각적인 대응이 가능한 하이브리드 발전 시스템 및 이를 위한 발전 방법을 제공하는데 있다.Summary of the Invention An object of the present invention is to provide a fuel cell system together with a renewable energy generation device (RG) and an energy storage device (ESS), while reducing the cost of a facility, and capable of immediately responding to instantaneous loads, and a power generation system for the same. To provide a method.
이에 상기 과제를 해결하기 위하여,In order to solve the above problems,
본 발명은 일실시예에서,The present invention in one embodiment,
전원으로서 재생 에너지 발전 장치(RG), 연료 전지 시스템(FC) 및 배터리 에너지 저장장치(BESS)가 개별 접속된 전원 버스부; 및 상기 전원 버스부에 접속되고, 전원 버스부로부터 공급된 전력이 1 이상의 부하에 공급되도록 전력을 제어하는 전력변환장치(PCS)를 포함하며,A power supply bus unit to which a renewable energy generation device RG, a fuel cell system FC, and a battery energy storage device BESS are individually connected as a power source; And a power converter (PCS) connected to the power bus unit and controlling power so that power supplied from the power bus unit is supplied to at least one load.
상기 연료 전지 시스템(FC)은 각각 개별적으로 운전되는 2 이상의 연료 전지 모듈을 구비하는 신재생 에너지 하이브리드 발전 시스템을 제공한다.The fuel cell system FC provides a renewable energy hybrid power generation system having at least two fuel cell modules that are operated individually.
또한, 본 발명은 일실시예에서, 상기 신재생 에너지 하이브리드 발전 시스템을 이용한 발전방법을 제공한다.In another embodiment, the present invention provides a power generation method using the renewable energy hybrid power generation system.
본 발명에 따른 신재생 에너지 하이브리드 발전 시스템은 재생 에너지 발전 장치(RG), 연료 전지 시스템(FC) 및 배터리 에너지 저장장치(BESS)를 포함하여 에너지 저장 시스템의 용량 증대를 위한 설비 비용이 낮고 순시적인 부하 변화에 즉각적으로 대응할 수 있을 뿐만 아니라 연료 전지 시스템의 단위 모듈화를 통하여 부하추종속도에 따른 느린 발전 속도를 향상시키는 효과가 우수하고, 배터리의 방전량을 낮추어 수명을 개선하는 효과가 우수한 이점이 있다.The renewable energy hybrid power generation system according to the present invention includes a renewable energy generation device (RG), a fuel cell system (FC) and a battery energy storage device (BESS) is low and instantaneous equipment cost for increasing the capacity of the energy storage system Not only can it respond immediately to load changes, but also has the advantage of improving the slow generation speed according to the load tracking speed through unit modularization of the fuel cell system, and has the advantage of improving the life by lowering the discharge amount of the battery. .
도 1은 신재생 에너지 하이브리드 발전 시스템에 구비된 연료 전지 시스템(FC)에 따른 시간에 따른 발전량 차이를 나타내는 그래프로서, (a)는 연료 전지 시스템(FC)이 단일 연료 전지 모듈인 경우를 나타내고, (b)는 연료 전지 시스템(FC)이 단위 모듈화된 복수의 연료 전지 모듈인 경우를 나타낸다.1 is a graph showing a difference in power generation amount according to a fuel cell system FC provided in a renewable energy hybrid power generation system, (a) shows a case where the fuel cell system FC is a single fuel cell module, (b) shows a case where the fuel cell system FC is a plurality of unit cell fuel modules.
도 2는 본 발명에 따른 신재생 에너지 하이브리드 발전 시스템의 구성을 도시한 개략도이다.Figure 2 is a schematic diagram showing the configuration of a renewable energy hybrid power generation system according to the present invention.
도 3은 본 발명에 따른 신재생 에너지 하이브리드 발전 시스템의 개별 전원의 개략적인 회로도(a)와 순시적인 부하 변화 시 개별 전원의 시간에 따른 전압 및 전력 변화를 도시한 그래프(b)이다.Figure 3 is a schematic circuit diagram (a) of the individual power supply of the renewable energy hybrid power generation system according to the present invention and a graph (b) showing the voltage and power change with time of the individual power supply in the instantaneous load change.
도 4는 본 발명에 따른 연료 전지 모듈의 구성을 도시한 개략도이다.4 is a schematic view showing a configuration of a fuel cell module according to the present invention.
도 5는 본 발명에 따른 신재생 에너지 하이브리드 발전 시스템의 운전 시 개별 전원의 제어모드를 도시한 개략도이다.Figure 5 is a schematic diagram showing the control mode of the individual power supply during operation of the renewable energy hybrid power generation system according to the present invention.
도 6은 배터리 에너지 저장장치(BESS)의 충전 상태(SOC)에 따른 연료 전지 시스템(FC)의 제어과정을 도시한 순서도이다.6 is a flowchart illustrating a control process of the fuel cell system FC according to the state of charge SOC of the battery energy storage device BESS.
본 발명은 다양한 변경을 가할 수 있고 여러 가지 실시예를 가질 수 있는 바, 특정 실시예들을 도면에 예시하고 상세한 설명에 상세하게 설명하고자 한다.As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description.
그러나, 이는 본 발명을 특정한 실시 형태에 대해 한정하려는 것이 아니며, 본 발명의 사상 및 기술 범위에 포함되는 모든 변경, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다.However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.
본 발명에서, "포함한다" 또는 "가지다" 등의 용어는 명세서상에 기재된 특징, 숫자, 단계, 동작, 구성요소, 부품 또는 이들을 조합한 것이 존재함을 지정하려는 것이지, 하나 또는 그 이상의 다른 특징들이나 숫자, 단계, 동작, 구성요소, 부품 또는 이들을 조합한 것들의 존재 또는 부가 가능성을 미리 배제하지 않는 것으로 이해되어야 한다.In the present invention, the terms "comprises" or "having" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.
본 발명에서, "부하"는 재생 에너지 발전 장치(RG), 연료 전지 시스템(FC), 배터리 에너지 저장장치(BESS) 등으로부터 공급된 전력을 소비하는 개체로서, 예를 들면 가정, 공장 등일 수 있다. 또한, 상기 부하에 공급되는 전력은 가정이나 공장 등에서 통상적으로 사용되는 전압/주파수 조건을 가질 수 있다. 하나의 예로서, 상기 부하에 공급되는 전력은 380/220V의 전압 및 60 Hz의 주파수를 가질 수 있다.In the present invention, the "load" is an individual consuming power supplied from a renewable energy generator (RG), a fuel cell system (FC), a battery energy storage device (BESS), etc., and may be, for example, a home, a factory, or the like. . In addition, the power supplied to the load may have a voltage / frequency condition commonly used in homes or factories. As one example, the power supplied to the load may have a voltage of 380 / 220V and a frequency of 60 Hz.
또한, 본 발명에서, "정격전압"은 부하의 정상적인 동작을 유지시키기 위해 공급해 주어야 하는 기준전압을 의미한다.In addition, in the present invention, "rated voltage" means a reference voltage to be supplied to maintain the normal operation of the load.
본 발명은 하이브리드 발전 시스템 및 이를 위한 발전 방법에 관한 것이다.The present invention relates to a hybrid power generation system and a power generation method for the same.
종래 재생 에너지 발전 장치는 에너지 밀도가 낮은 자연 에너지를 이용하여 발전되는 신재생 에너지가 불규칙적이므로, 전력 수요에 따라 효율적으로 전력을 공급하기 위해서는 재생 에너지 발전 장치와 발전된 전기를 저장하는 에너지 저장장치(energy storage system, ESS)가 혼용하는 형태로 이용되고 있다.In the conventional renewable energy generation device, since renewable energy generated by using natural energy having a low energy density is irregular, in order to supply power efficiently according to electric power demand, a renewable energy generation device and an energy storage device for storing the generated electricity (energy) storage system (ESS) is being used in a mixed form.
그러나 이러한 발전 시스템은 재생 에너지 발전 장치가 가동되지 않을 때 충분한 전력을 공급하기 위하여 에너지 저장 시스템(ESS)의 용량이 커야 하므로 이를 위한 설비 비용이 높은 한계가 있다. 또한, 상기 문제를 보완하기 위하여 하이브리드 발전 시스템에 연료 전지 시스템(FC)을 혼용하는 경우 설비 비용은 절감할 수 있으나, 순시적인 부하에 대한 연료 전지의 동적 응답 특성이 느려 과부하나 피크부하에 충분히 대응하기 어려운 한계가 있다.However, such a power generation system has a high installation cost for this because the capacity of the energy storage system (ESS) must be large in order to supply sufficient power when the renewable energy generation device is not operating. In addition, when the fuel cell system (FC) is used in a hybrid power generation system to reduce the above-mentioned problems, the installation cost can be reduced, but the dynamic response characteristics of the fuel cell to instantaneous loads are slow so that they sufficiently cope with overload or peak load. There is a limit that is difficult to do.
이에, 본 발명은 신재생 에너지 하이브리드 발전 시스템 및 이를 위한 발전 방법을 제공한다.Accordingly, the present invention provides a renewable energy hybrid power generation system and a power generation method therefor.
본 발명에 따른 신재생 에너지 하이브리드 발전 시스템은 재생 에너지 발전 장치(RG), 연료 전지 시스템(FC) 및 배터리 에너지 저장장치(BESS)를 포함하여 에너지 저장 시스템의 용량 증대를 위한 설비 비용이 낮고 순시적인 부하 변화에 즉각적으로 대응할 수 있을 뿐만 아니라 연료 전지 시스템의 단위 모듈화를 통하여 부하추종속도에 따른 느린 발전 속도를 향상시키는 효과가 우수하고, 배터리의 방전량을 낮추어 수명을 개선하는 효과가 우수한 이점이 있다.The renewable energy hybrid power generation system according to the present invention includes a renewable energy generation device (RG), a fuel cell system (FC) and a battery energy storage device (BESS) is low and instantaneous equipment cost for increasing the capacity of the energy storage system Not only can it respond immediately to load changes, but also has the advantage of improving the slow generation speed according to the load tracking speed through unit modularization of the fuel cell system, and has the advantage of improving the life by lowering the discharge amount of the battery. .
이하, 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail.
본 발명은 일실시예에서,The present invention in one embodiment,
전원으로서 재생 에너지 발전 장치(RG), 연료 전지 시스템(FC) 및 배터리 에너지 저장장치(BESS)가 개별 접속된 전원 버스부; 및 상기 전원 버스부에 접속되고, 전원 버스부로부터 공급된 전력이 1 이상의 부하에 공급되도록 전력을 제어하는 전력변환장치(PCS)를 포함하며,A power supply bus unit to which a renewable energy generation device RG, a fuel cell system FC, and a battery energy storage device BESS are individually connected as a power source; And a power converter (PCS) connected to the power bus unit and controlling power so that power supplied from the power bus unit is supplied to at least one load.
상기 연료 전지 시스템(FC)은 각각 개별적으로 운전되는 2 이상의 연료 전지 모듈을 구비하는 신재생 에너지 하이브리드 발전 시스템을 제공한다.The fuel cell system FC provides a renewable energy hybrid power generation system having at least two fuel cell modules that are operated individually.
본 발명에 따른 신재생 에너지 하이브리드 발전 시스템은 전력을 공급하는 전원 버스부와 상기 전원 버스부에 접속되어 전원 버스부로부터 공급된 전력을 1 이상의 부하에 공급되도록 변환하는 전력변환장치(PCS)를 포함한다.The renewable energy hybrid power generation system according to the present invention includes a power bus unit for supplying power and a power converter (PCS) connected to the power bus unit for converting power supplied from the power bus unit to be supplied to at least one load. do.
이때, 상기 연료 전지 시스템(FC)은 연료 전지가 단위 모듈화된 연료 전지 모듈을 포함할 수 있다. 구체적으로, 연료 전지 모듈에 구비된 연료 전지부는 배터리 에너지 저장장치(BESS)의 배터리에 비하여 부하에 대응하는 추종속도가 느리고, 급격한 부하 변화에 따른 출력 변화는 연료전지 스택 수명에 악영향을 줄 수 있으므로 연료전지 스택의 성능을 보장하기 위한 최소한의 부하추종 속도 제한을 두게 된다. 이러한 속도 제한으로 인해 전력이 생산되는 속도 또한 제한된다. 그러나, 본 발명은 전체 부하에 대응하기 위하여 연료 전지 시스템(FC) 내에 연료 전지가 단위 모듈화된 복수개의 연료 전지 모듈을 구비하여 도 1에 나타낸 바와 같이 연료 전지 시스템(FC)의 부하추종 속도를 연료 전지 모듈의 개수에 비례화함으로써 연료 전지 시스템(FC)의 부하대응 성능을 향상시킬 수 있으며, 동시에 배터리 에너지 저장장치(BESS)의 배터리의 방전량(depth of discharge, DOD)을 저감시켜 배터리 수명을 연장시키는 효과가 있다. 여기서, 연료 전지 시스템에 구비된 연료 전지 모듈의 개수는 2 내지 100개일 수 있고, 보다 구체적으로는 5 내지 90개, 10 내지 50개, 50 내지 100개, 2 내지 80개, 2 내지 60개, 2 내지 40개, 2 내지 20개, 2 내지 10개, 5 내지 15개, 5 내지 10개, 또는 2 내지 5개일 수 있다.In this case, the fuel cell system FC may include a fuel cell module in which a fuel cell is modularized. Specifically, the fuel cell unit provided in the fuel cell module has a lower tracking speed corresponding to the load than the battery of the battery energy storage device (BESS), and the output change due to the sudden load change may adversely affect the fuel cell stack life. There is a minimum load tracking speed limit to ensure the performance of the fuel cell stack. This speed limit also limits the rate at which power is produced. However, the present invention includes a plurality of fuel cell modules in which a fuel cell is modularized in a fuel cell system FC so as to correspond to the total load, and thus, the load tracking speed of the fuel cell system FC is fueled as shown in FIG. 1. The load response performance of the fuel cell system (FC) can be improved by proportionalizing the number of battery modules, and at the same time, the battery life is reduced by reducing the depth of discharge (DOD) of the battery of the battery energy storage device (BESS). It is effective to prolong. Here, the number of fuel cell modules provided in the fuel cell system may be 2 to 100, more specifically 5 to 90, 10 to 50, 50 to 100, 2 to 80, 2 to 60, It may be 2 to 40, 2 to 20, 2 to 10, 5 to 15, 5 to 10, or 2 to 5.
하나의 예로서, 본 발명에 따른 연료 전지 시스템(FC)은 20 kW의 전력을 생산하는 하나의 연료 전지 대신에 2 kW의 전력을 생산하는 10개의 연료 전지 모듈을 포함하여 동일한 전력을 보다 빠르게 생성할 수 있다.As an example, the fuel cell system FC according to the present invention includes 10 fuel cell modules that produce 2 kW of power instead of one fuel cell that produces 20 kW of power, producing the same power faster. can do.
이와 더불어, 상기 연료 전지 시스템(FC)은 출력전력의 확장과 고장 발생 시 보수의 편리성을 위하여 복수개의 연료 전지 모듈을 병렬로 연결하는 구성을 가질 수 있다.In addition, the fuel cell system FC may have a configuration in which a plurality of fuel cell modules are connected in parallel in order to expand output power and to facilitate maintenance when a failure occurs.
도 2는 본 발명에 따른 신재생 에너지 하이브리드 발전 시스템을 도시한 이미지이다. 이하에서, 상기 도 2를 참조하여 신재생 에너지 하이브리드 발전 시스템의 각 구성을 보다 구체적으로 설명한다.2 is an image showing a renewable energy hybrid power generation system according to the present invention. Hereinafter, each configuration of the renewable energy hybrid power generation system will be described in more detail with reference to FIG. 2.
먼저, 본 발명에 따른 전원 버스부는 독립적으로 운영되는 재생 에너지 발전 장치(RG), 연료 전지 시스템, 배터리 에너지 저장장치(battery energy storage system, BESS)를 포함하는 구성을 갖는다. 본 발명은 전원 버스부에 개별 전원으로서 재생 에너지 발전 장치(RG), 연료 전지 시스템(FC) 및 배터리 에너지 저장장치(BESS)를 구비하여 발전 설비를 설치하는 비용을 저감시킬 수 있을 뿐만 아니라 밤/낮의 변화와 같이 시간에 따른 환경조건 변화로 재생 에너지 발전 장치(RG)가 가동되지 않는 경우에도 전력을 일정하게 공급할 수 있다.First, the power bus unit according to the present invention has a configuration including a renewable energy generation device (RG), a fuel cell system, a battery energy storage system (BESS) independently operated. The present invention is provided with a renewable energy generation device (RG), a fuel cell system (FC) and a battery energy storage device (BESS) as individual power supplies in the power bus unit, as well as to reduce the cost of installing the power generation equipment as well as night / Even when the renewable energy generation device RG is not operated due to a change in environmental conditions over time, such as a change in daytime, power can be supplied constantly.
여기서, 상기 전원 버스부는 그 형태가 특별히 제한되는 것은 아니나, 에너지 효율 측면에서 직류 버스(direct current bus, DC-BUS)형일 수 있다. 직류 버스(DC-BUS)는 교류 버스(alternating current bus, AC-BUS)와 달리 시스템의 안정도, 주파수 동기화 및 무효전력에 대한 문제가 없을 뿐만 아니라, 태양광, 풍력, 연료 전지 같은 직류 발전 시스템에 2차 전력 변환 없이 적용할 수 있으므로` 에너지 측면에서 효율적이다. 아울러, 상기 전원 버스부는 각 전원의 출력 기준전압 차이, 즉 전원간 출력 시 전위차에 따라 자동적으로 가동하는 구성을 가지므로 각 전원 간의 정보를 송수신하지 않는 자율 제어 방식을 사용할 수 있다.Here, the form of the power bus is not particularly limited, but may be a direct current bus (DC-BUS) type in terms of energy efficiency. DC-BUS, unlike alternating current bus (AC-BUS), has no problems with system stability, frequency synchronization, and reactive power, but it can also be applied to DC power systems such as solar, wind and fuel cells. It can be applied without secondary power conversion, which is efficient in terms of energy. In addition, since the power bus unit is configured to automatically operate according to the output reference voltage difference of each power source, that is, the potential difference in output between power sources, an autonomous control method that does not transmit or receive information between power sources can be used.
나아가, 상기 전원 버스부는 각 전원의 출력 기준전압이 식 1의 조건을 만족하도록 설정될 수 있다. 본 발명에 따른 상기 전원들은 식 1을 만족하는 출력 기준전압으로 설정됨으로써 전원 버스부와 부하 사이에서 발생되는 유효전력/무효전력에 따라 출력 전압을 낮추려고 하는 드룹 제어(droop control) 방식에 의해 전원 버스부의 전압에 따라 설정된 출력 기준전압에 맞춰 운전 시퀀스를 가질 수 있으며, 각 전원은 상기 운전 시퀀스에 따라 독립적으로 자동 운영될 수 있다. 상기 드룹 제어(droop control)는 각 전원 및 전력변환장치(PCS)간의 연계나 별도의 제어 없이 각 전원을 자동적으로 제어할 수 있으므로 신뢰성이 높은 이점이 있다:Furthermore, the power bus unit may be set such that the output reference voltage of each power source satisfies the condition of Equation 1. The power supplies according to the present invention are set to an output reference voltage that satisfies Equation 1, and thus, the power supply is controlled by a droop control scheme for lowering the output voltage according to the active power / reactive power generated between the power bus portion and the load. The driving sequence may have an operation sequence according to the output reference voltage set according to the voltage of the bus unit, and each power source may be automatically operated independently according to the operation sequence. The droop control has an advantage of high reliability since it can automatically control each power source without any connection or separate control between each power source and the power converter (PCS):
[식 1] VRG ≥ VFC ≥ VBESS Equation 1 V RG ≥ V FC ≥ V BESS
(식 1에서,(In equation 1,
VRG는 재생 에너지 발전 장치(RG)의 출력 기준전압이고,V RG is the output reference voltage of the renewable energy generator (RG),
VFC는 연료 전지 시스템(FC)의 출력 기준전압이며,V FC is the output reference of the fuel cell system (FC),
VBESS는 배터리 에너지 저장장치(BESS)의 출력 기준전압이다).V BESS is the output reference of the battery energy storage (BESS).
여기서, 각 전원별 출력 기준전압은 식 1에 나타낸 바와 같이 재생 에너지 발전 장치(RG)의 출력 기준전압(VRG)이 가장 높고, 이후 연료 전지 시스템(VFC) 및 배터리 에너지 저장장치(VBESS)의 순으로 출력 기준전압이 높을 수 있다.Here, the output reference voltage for each power source has the highest output reference voltage V RG of the renewable energy generation device RG, as shown in Equation 1, and then the fuel cell system V FC and the battery energy storage device V BESS. ), The output reference voltage may be high.
본 발명은 각 전원의 출력 기준전압을 상기와 같은 순으로 제어하여 부하 발생으로 인해 전원 버스부의 출력이 요구될 경우, 전원 버스부의 전압에 따라 출력 기준전압이 높은 전원 순으로 자동 병입되어 가동되는 구성을 갖는다. 예컨대, 본 발명의 신재생 에너지 하이브리드 시스템은 부하 발생으로 인한 전원 버스부의 출력이 요구될 경우 부하 대응속도가 빠른 전원배터리 에너지 저장장치(BESS)가 먼저 가동되고, 가동된 배터리 에너지 저장장치(BESS)의 충전 상태(SOC)가 설정값 미만으로 낮아지기 이전에 도 3에 나타낸 바와 같이 출력 기준전압이 가장 높은 재생 에너지 발전 장치(RG)가 병입되어 가동될 수 있다. 그 후 재생 에너지 발전 장치(RG)의 가동으로 인해 전원 버스부의 전압이 연료 전지 시스템(FC)의 출력 기준전압(VFC)까지 낮아지면 연료 전지 시스템(FC)이 추가적으로 병입되어 운전될 수 있다. 이와 더불어, 재생 에너지 발전 장치(RG)의 경우와 마찬가지로 연료 전지 시스템(FC)의 운전으로 인해 전원 버스부의 전압이 배터리 에너지 저장장치(BESS)의 출력 기준전압(VBESS)까지 낮아지면 배터리 에너지 저장장치(BESS)가 추가적으로 병입되어 가동될 수 있다. 이와 같이 본 발명은 부하 발생에 따라 대응 속도가 빠른 배터리 에너지 저장장치(BESS)가 대응한 후 배터리 에너지 저장장치(BESS)의 충전 상태(SOC)가 설정된 수준을 벗어나기 이전에 설정된 각 전원의 출력 기준전압이 높은 순으로 가동 시퀀스를 가짐으로써 배터리 에너지 저장장치(BESS) 사용의 최소화를 통해 충전 상태(SOC)를 최대로 유지할 수 있으므로 배터리 에너지 저장장치(BESS)의 용량 및 수명 문제를 개선할 수 있다.The present invention controls the output reference voltage of each power supply in the order described above, when the output of the power bus unit is required due to the load generation, the configuration that is automatically fed and operated in the order of the power supply output voltage in accordance with the voltage of the power bus unit Has For example, in the renewable energy hybrid system of the present invention, when the output of the power bus unit is required due to a load generation, the power battery energy storage device BESS having a high load response speed is first operated, and the operated battery energy storage device BESS is operated. Before the state of charge SOC is lowered below the set value, as shown in FIG. 3, the renewable energy generator RG having the highest output reference voltage may be fed and operated. Thereafter, when the voltage of the power bus unit is lowered to the output reference voltage V FC of the fuel cell system FC due to the operation of the renewable energy generation device RG, the fuel cell system FC may be additionally fed and operated. In addition, as in the case of the renewable energy generation device RG, when the voltage of the power bus unit drops to the output reference voltage V BESS of the battery energy storage device BESS due to the operation of the fuel cell system FC, the battery energy storage is performed. The device BESS can additionally be fed in and run. As described above, the present invention is based on the output power of each power source set before the battery energy storage device (BESS) with a fast response speed corresponding to the occurrence of the load, but before the state of charge (SOC) of the battery energy storage device (BESS) is out of the set level. Having the operating sequence in the order of the highest voltage can minimize the use of the battery energy storage device (BESS) to maintain the state of charge (SOC) to the maximum, thereby improving the capacity and life problems of the battery energy storage device (BESS). .
한편, 각 전원은 100V 내지 1,000V의 출력 기준전압, 보다 구체적으로는 100V 내지 9000V, 100V 내지 800V, 100V 내지 700V, 100V 내지 600V, 100V 내지 500V, 100V 내지 400V¸100V 내지 300V, 200V 내지 1,000V, 400V 내지 1,000V, 600V 내지 1,000V, 800V 내지 1,000V, 200V 내지 700V, 400V 내지 600V¸500V 내지 800V 또는 300V 내지 500V의 출력 기준전압으로 설정될 수 있으며, 상기 범위는 신재생 에너지 하이브리드 발전기의 설계 여건에 따라 적절히 조절될 수 있다.On the other hand, each power supply is an output reference voltage of 100V to 1,000V, more specifically 100V to 9000V, 100V to 800V, 100V to 700V, 100V to 600V, 100V to 500V, 100V to 400V¸ 100V to 300V, 200V to 1,000V , 400V to 1,000V, 600V to 1,000V, 800V to 1,000V, 200V to 700V, 400V to 600V¸ 500V to 800V or 300V to 500V, the range can be set to the renewable energy hybrid generator It can be properly adjusted according to the design conditions.
다음으로, 상기 재생 에너지 발전 장치(RG)는 비통제 전원(non-controlled power supply)으로서 별도의 제어부를 포함하지 않고, 설정된 출력 기준전압을 기준으로 전원 버스부의 전압에 따라 독립적으로 가동될 수 있다.Next, the renewable energy generator RG does not include a separate control unit as a non-controlled power supply, and may be independently operated according to the voltage of the power bus unit based on the set output reference voltage. .
이러한 재생 에너지 발전 장치(RG)로는 화석 연료 또는 원자력을 이용한 발전 시스템이 아니라면 특별히 제한되지 않고 적용될 수 있다. 예를 들어, 상기 재생 에너지 발전 장치(RG)로는 태양광 발전기, 태양열 발전기, 풍력 발전기, 수력 발전기, 계단의 압전 에너지 블록 시스템, 전동기의 회생제동 에너지 시스템, 지열 발전기 및 조력 발전기로 이루어진 군으로부터 선택되는 1종 이상을 포함할 수 있다. 하나의 예로서, 상기 재생 에너지 발전 장치(RG)는 태양광 발전기와 풍력 발전기를 함께 포함할 수 있고, 경우에 따라서는 2 이상의 태양광 발전기를 포함할 수 있다. 아울러, 재생 에너지 발전 장치(RG)는 그 종류에 따라 가동 시간이 제어될 수 있으며, 장치가 설치된 주변 환경 조건, 예컨대 날씨, 일조량, 온도, 풍량, 설치되는 지점의 위치 조건(경도/위도나 고도 등) 등은 물론 밤/낮 등의 시간 변화에 따라 발전량이 영향 받을 수 있다.The renewable energy generator (RG) may be applied without particular limitation, unless it is a power generation system using fossil fuel or nuclear power. For example, the renewable energy generator (RG) is selected from the group consisting of a solar generator, a solar generator, a wind generator, a hydro generator, a piezoelectric energy block system of a staircase, a regenerative braking energy system of an electric motor, a geothermal generator and an tidal generator. It may include one or more kinds. As an example, the renewable energy generation device RG may include a solar generator and a wind generator together, and in some cases, may include two or more solar generators. In addition, the operation time of the renewable energy generation device (RG) can be controlled according to its type, and the environmental conditions in which the device is installed, such as weather, sunshine, temperature, air volume, and location conditions (hardness / latitude or altitude) of the installed point Etc.), of course, the amount of power generation may be affected by the change of time such as night / day.
다음으로, 연료 전지 시스템(FC)은 앞서 설명한 바와 같이 연료 전지가 단위 모듈화된 연료 전지 모듈을 복수개 구비하고, 여기서, 상기 연료 전지 모듈 각각은 도 4에 나타낸 바와 같이,Next, the fuel cell system FC includes a plurality of fuel cell modules in which a fuel cell is modularized as described above, wherein each of the fuel cell modules is illustrated in FIG. 4.
태양광 전지(photovoltaic cell, PV)와 같은 재생 에너지 발전 장치(RG) 등을 포함하는 전원 공급원으로부터 공급받은 전력으로 전해조에 있는 초순수를 전기 분해하여 수소(H2)를 발생시키는 수전해부;A water discharging unit for generating hydrogen (H 2 ) by electrolyzing ultrapure water in an electrolytic cell with power supplied from a power supply source including a renewable energy generator (RG) such as a photovoltaic cell (PV);
수전해부와 연결되어 발생된 수소(H2)를 저장하는 수소(H2) 저장부;A hydrogen (H 2 ) storage unit for storing hydrogen (H 2 ) generated in connection with the hydrolysis unit;
수소 저장부(H2)와 연결되어 저장된 수소(H2)를 공급받고, 공급된 수소(H2)로부터 전력과 초순수를 생성하는 스택을 포함하는 연료 전지부; 및A fuel cell unit including a stack connected to a hydrogen storage unit (H 2 ) to receive stored hydrogen (H 2 ) and to generate electric power and ultrapure water from the supplied hydrogen (H 2 ); And
연료 전지부와 연결되어 생성된 초순수를 수전해부의 전해조에 공급하는 수 공급부를 포함할 수 있다.It may include a water supply unit for supplying the ultra-pure water generated in connection with the fuel cell unit to the electrolytic cell of the water receiving section.
본 발명에 따른 연료 전지 모듈은 전원 버스부에 접속된 재생 에너지 발전 장치(RG) 외에 별도로 설비된 재생 에너지 발전 장치(RG)로부터 공급받은 전력으로 전해조의 초순수를 전기 분해하여 수소(H2)를 생성할 수 있고, 이렇게 생성된 수소(H2)는 수소(H2) 저장부에 저장하였다가 부하에 전력을 공급하여야 할 경우, 연료 전지부에 공급되어 연료 전지부의 스택에서 전력과 초순수로 전환할 수 있다.The fuel cell module according to the present invention electrolyzes the ultrapure water of the electrolytic cell with the power supplied from the renewable energy generation device RG separately installed in addition to the renewable energy generation device RG connected to the power bus unit to generate hydrogen (H 2 ). When the hydrogen (H 2 ) is generated and stored in the hydrogen (H 2 ) storage and power is supplied to the load, the hydrogen (H 2 ) is supplied to the fuel cell to supply power and ultrapure water from the stack of the fuel cell. You can switch.
이때, 전해조에서 전기 분해되는 물은 전기 분해 시 순수하게 수소(H2)와 산소(O2)만을 생성하기 위한 정제수(Deionized water, DI water) 등과 같은 초순수일 수 있으며, 상기 초순수는 전도도가 10 us/cm 이하, 구체적으로는 1~10 us/cm일 수 있다. 또한, 수소(H2) 저장부에서 공급된 수소(H2)를 이용하여 연료 전지부의 전지 스택에서 생성된 반응수는 순수한 수소(H2)와 공기 중의 산소(O2)가 반응하여 생성되므로 전도도 10 us/cm 이하의 초순수일 수 있다.In this case, the electrolyzed water in the electrolytic cell may be ultrapure water such as purified water (DI water) for generating only hydrogen (H 2 ) and oxygen (O 2 ) purely during electrolysis, and the ultrapure water has a conductivity of 10 us / cm or less, specifically 1-10 us / cm. In addition, the reaction water generated in the battery stack of the fuel cell unit using hydrogen (H 2 ) supplied from the hydrogen (H 2 ) storage unit is generated by reacting pure hydrogen (H 2 ) with oxygen (O 2 ) in the air. Therefore, the conductivity may be ultra pure water of 10 us / cm or less.
이와 더불어, 상기 연료 전지 모듈은 연료 전지부와 연결되어 연료 전지부의 스택에서 생성된 초순수를 수전해부의 전해조에 공급하는 수 공급부를 포함할 수 있다. 본 발명은 수 공급부를 포함함으로써 연료 전지부에서 생성된 반응수를 수 전해부에서 사용되는 초순수로 재활용할 수 있으므로 초순수 제조를 위한 번거로운 공정을 생략할 수 있어 공정성이 우수하고, 생산성이 높은 이점이 있다.In addition, the fuel cell module may include a water supply unit connected to the fuel cell unit and supplying ultrapure water generated in the stack of the fuel cell unit to the electrolytic cell of the hydrolysis unit. According to the present invention, since the reaction water generated in the fuel cell unit can be recycled into the ultrapure water used in the electrolytic unit by including the water supply unit, the cumbersome process for preparing the ultrapure water can be omitted, resulting in excellent processability and high productivity. have.
한편, 일반적으로 전해조는 수소(H2) 생성 시, 고온의 초순수를 사용하는 경우 수소(H2) 생산 효율을 극대화할 수 있다. 이에, 본 발명은 초순수가 담긴 연료 전지부의 전해조 온도를 높이기 위하여 연료전지 모듈의 전력 생성 시 스택에서 발생되는 폐열을 집열(축열)하여 전해조에 전달하는 구성을 더 포함할 수 있다. 구체적으로, 상기 연료 전지 모듈은 도 4에 나타낸 바와 같이, 연료 전지부에서 발생하는 폐열을 집열시키는 집열부; 및 집열부의 열원을 열 교환에 의해 수전해부의 전해조로 전달하는 열 교환부를 더 포함할 수 있다. 상기 연료 전지 모듈은 집열부와 열 교환부를 구비함으로써 연료 전지부에서 발생되는 폐열을 전해조에 효과적으로 전달하여 전해조의 초순수를 별도의 에너지(또는 전력)를 소비하지 않고도 효율적으로 가열할 수 있고, 수소 생산 시 전해조의 가열을 위한 준비 시간이 요구되지 않아 수소 생산 효율이 증가하는 이점이 있다.On the other hand, in general, the electrolytic cell may maximize the hydrogen (H 2) production efficiency when using hydrogen (H 2) generated when, a high-temperature ultra-pure water. Thus, the present invention may further include a configuration for collecting (heating) the waste heat generated in the stack when the power generation of the fuel cell module to increase the electrolytic cell temperature of the fuel cell unit containing ultrapure water to deliver to the electrolytic cell. Specifically, as shown in FIG. 4, the fuel cell module may include a heat collecting unit configured to collect waste heat generated from the fuel cell unit; And it may further include a heat exchanger for transferring the heat source of the heat collecting portion to the electrolytic cell of the receiving portion by heat exchange. The fuel cell module effectively collects waste heat generated from the fuel cell unit by providing a heat collecting unit and a heat exchanger to the electrolytic cell to efficiently heat the ultrapure water of the electrolytic cell without consuming extra energy (or power), and to produce hydrogen. Since the preparation time for heating the electrolyzer is not required, the hydrogen production efficiency is increased.
이때, 전해조의 온도는 50℃ 내지 90℃일 수 있고, 구체적으로는 50℃ 내지 80℃, 60℃ 내지 90℃, 60℃ 내지 80℃, 55℃ 내지 75℃, 50℃ 내지 65℃, 65℃ 내지 90℃ 또는 65℃ 내지 75℃일 수 있다.At this time, the temperature of the electrolytic cell may be 50 ℃ to 90 ℃, specifically 50 ℃ to 80 ℃, 60 ℃ to 90 ℃, 60 ℃ to 80 ℃, 55 ℃ to 75 ℃, 50 ℃ to 65 ℃, 65 ℃ To 90 ° C or 65 ° C to 75 ° C.
나아가, 전해조에서 생성된 수소(H2)와 산소(O2)는 따로 압축하여 저장한 후 사용할 경우 연료전지 모듈의 연료극에는 압축된 수소를 공급하고, 공기극에는 압축된 산소를 공급하여 연료전지의 모듈에서 공기 중의 산소를 공급하기 위한 에어블로워 공정을 수행하지 않아도 되고, 에어블로워 공정으로 인한 전력 소비를 없앨 수 있으므로 연료전지 모듈의 효율을 약 10% 이내로 향상시킬 수 있고, 추가적인 원가절감 효과를 얻을 수 있다.Furthermore, when hydrogen (H 2 ) and oxygen (O 2 ) generated in the electrolytic cell are compressed and stored separately, compressed hydrogen is supplied to the fuel electrode of the fuel cell module, and compressed oxygen is supplied to the cathode to supply the compressed oxygen. It is not necessary to perform the air blower process for supplying oxygen in the air from the module, and it can eliminate the power consumption due to the air blower process, which can improve the efficiency of the fuel cell module to within about 10% and obtain additional cost reduction effect. Can be.
아울러, 상기 연료 전지 시스템(FC)은 제어부(energy management system, EMS)에 의해 독립적으로 제어될 수 있다. 여기서, 상기 제어부(EMS)는 도 5에 나타낸 바와 같이 전원 버스부에 연계되어 부하(laod) 발생 시 부하에서 요구하는 전력랑(PL)을 수신함과 동시에 재생 에너지 발전 장치(RG)의 각 전력량(PRG, PW 및/또는 PPV), 연료 전지 시스템(FC)의 전력량(PFC)과 저장된 수소(H2)의 부피량(VH2), 및 배터리 에너지 저장장치(BESS)의 전력량(PESS)과 충전 상태(SOC)를 계측 및/또는 수신할 수 있다. 또한, 상기 제어부(EMS)는 비례적분 제어기(PI controller), 비례 적분미분 제어기(PID controller) 등의 포함하여 설정된 배터리 에너지 저장장치(BESS)의 충전 상태(SOC) 기준값을 추종하도록 제2 전원인 연료 전지 시스템의 가동을 제어할 수 있다. 예를 들어, 상기 제어부(EMS)는 도 6와 같이 배터리 에너지 저장장치(BESS)의 충전 상태(SOC) 기준값(85% 이상)이 설정되면 배터리 에너지 저장장치(BESS)로부터 수신된 시스템의 충전 상태(SOC) 및/또는 배터리 용량(battery capacity)이 설정된 충전 상태(SOC) 기준값 보다 낮은 경우(<85%), 배터리 에너지 저장장치(BESS)가 상기 충전 상태(SOC) 기준값을 추종할 수 있도록 비례적분제어기(PI controller)를 통해 연료 전지 시스템(FC)을 가동(ON)시킬 수 있으며, 이때 연료 전지 시스템(FC)의 가동량은 배터리 에너지 저장장치(BESS)로부터 수신된 시스템의 충전 상태(SOC) X 출력이 될 수 있다. 나아가, 상기 제어부(EMS)는 제3 전원으로부터 수신된 정보(예컨대, 전력량, 전압, 전류, 셀 온도 등)로부터 과충전, 과방전, 과전류, 셀 밸런싱 여부, 충전상태(SOC), 노화 상태(SOH)를 판단하고 제2 전원의 동작을 제어하기 위한 마이크로 컴퓨터, 마이크로 컴퓨터의 제어 신호에 따라 각 기능을 수행하는 보호회로 등을 포함할 수 있다.In addition, the fuel cell system FC may be independently controlled by an energy management system (EMS). Here, the control unit EMS is connected to the power bus unit as shown in FIG. 5 to receive the electric power P L required by the load when a load occurs, and at the same time, each amount of power of the renewable energy generation device RG. (P RG , P W and / or P PV ), the power amount P FC of the fuel cell system FC and the volume amount V H2 of stored hydrogen H 2 , and the power amount of the battery energy storage device BESS. The P ESS and the state of charge SOC may be measured and / or received. In addition, the controller EMS is a second power source to follow a state of charge (SOC) reference value of a battery energy storage device (BESS) that is set including a proportional integral controller (PI controller), a proportional integral differential controller (PID controller), and the like. Operation of the fuel cell system can be controlled. For example, as shown in FIG. 6, the controller EMS may determine the state of charge of the system received from the battery energy storage device BESS when the SOC reference value (85% or more) of the battery energy storage device BESS is set. If the SOC and / or battery capacity is lower than the set SOC threshold (<85%), the BESS will be proportional to follow the SOC threshold. The PI controller can be used to turn on the fuel cell system FC, where the operating amount of the fuel cell system FC is determined by the state of charge (SOC) of the system received from the battery energy storage device (BESS). ) Can be an X output. In addition, the controller EMS may perform overcharge, overdischarge, overcurrent, cell balancing, SOC, and aging state (SOH) from information received from a third power source (for example, power amount, voltage, current, and cell temperature). ) And a protection circuit for performing each function according to a control signal of the microcomputer.
다음으로, 상기 배터리 에너지 저장장치(battery energy storage system, BESS)는 태양광 발전 시스템, 풍력 발전 시스템 등을 포함하는 재생 에너지 발전 장치(RG)로부터 공급된 전력을 저장하고, 전원 버스부의 전압이 배터리 에너지 저장장치(BESS)의 출력 기준전압에 도달하는 경우 저장된 전력을 부하에 공급하는 전원으로서의 기능을 수행한다.Next, the battery energy storage system (BESS) stores the power supplied from the renewable energy generation device (RG) including a photovoltaic power generation system, a wind power generation system, the voltage of the power bus unit battery When the output reference voltage of the energy storage device (BESS) is reached, it functions as a power source for supplying stored power to the load.
이러한 배터리 에너지 저장장치(BESS)로는 그 종류가 특별히 제한되는 것은 아니며, 상세하게는 재생 에너지 저장장치(RG)로부터 공급된 전력을 저장하기 위한 고용량의 니켈-카드뮴 이차전지, 리튬 이온 이차전지, 리튬 금속 이차전지, 리튬 폴리머 이차전지, 니켈-수소 이차전지 등일 수 있다. The type of the battery energy storage device (BESS) is not particularly limited, and in detail, a high-capacity nickel-cadmium secondary battery, a lithium ion secondary battery, and lithium for storing electric power supplied from the renewable energy storage device (RG). Metal secondary batteries, lithium polymer secondary batteries, nickel-hydrogen secondary batteries, and the like.
또한, 상기 배터리 에너지 저장장치(BESS)는 부하에 전력을 공급할 경우 별도의 전력 생산 동작 없이 저장된 전력을 제공하므로 전원 버스부에 접속된 전원 중 과부하나 피크부하 등의 갑작스러운 부하 변화에 가장 대응속도가 빠른 특징을 갖는다. 그러나, 부하 발생 시 배터리 에너지 저장장치(BESS)를 이용하여 부하 변화에 대응하는 경우 대응속도는 빠르나 배터리 에너지 저장장치(BESS)의 잦은 방전으로 인해 시스템의 용량 및 수명이 빠르게 단축되는 문제가 있다. 이에, 본 발명은 배터리 에너지 저장장치(BESS)의 설치 및/또는 교체에 따라 발생되는 비용을 고려하여 배터리의 충전 상태(State, of charge, SOC)가 최대가 되도록, 순시적인 부하 발생 시 배터리 에너지 저장장치(BESS)가 가장 먼저 가동되더라도 배터리 에너지 저장장치(BESS)의 충전 상태(SOC)를 일정 수준, 예컨대, 80% 이상, 구체적으로는 85% 이상, 86% 이상, 88% 이상 또는 90% 이상으로 유지할 수 있도록 기준값이 설정되며, 배터리 에너지 저장장치(BESS)의 충전 상태(SOC)가 설정된 기준값을 벗어나기 이전에 출력 기준전압이 낮은 재생 에너지 저장장치(RG) 및 연료저장 시스템(FC)의 가동이 순차적으로 운영하는 구성을 갖는다.In addition, the battery energy storage device (BESS) provides the stored power without a separate power production operation when the power is supplied to the load, the most response speed to sudden load changes such as overload or peak load among the power connected to the power bus bus Has fast features. However, when a load is generated, the response speed is high when the load is changed by using the battery energy storage device (BESS), but the capacity and life of the system are shortened rapidly due to frequent discharge of the battery energy storage device (BESS). Accordingly, the present invention is to maximize the state of charge (SOC) of the battery in consideration of the costs incurred by the installation and / or replacement of the battery energy storage device (BESS), the battery energy when the instantaneous load occurs Even if the storage device BESS is activated first, the SOC of the battery energy storage device BESS may be at a certain level, for example, 80% or more, specifically 85% or more, 86% or more, 88% or 90%. The reference value is set to maintain the abnormality, and the output energy of the renewable energy storage device RG and the fuel storage system FC having a low output reference voltage before the SOC of the battery energy storage device BESS is out of the set reference value. The operation has a configuration that operates sequentially.
하나의 예로서, 상기 배터리 에너지 저장장치(BESS)는 순시적인 부하 변화에 따라 전력을 공급하는 경우 우선적으로 배터리 에너지 저장장치(BESS)의 전력이 공급되되, 배터리 에너지 저장장치(BESS)의 충전 상태가 80% 미만으로 떨어지기 이전에 재생 에너지 발전 장치(RG) 및 연료 전지 시스템(FC)에서 전력이 순차적으로 공급되도록 운영될 수 있다. 본 발명은 배터리 에너지 저장장치(BESS)의 충전 상태(SOC)를 상기와 같은 수준으로 유지함으로써 베터리의 용량 및 수명을 증가시킬 수 있다.As an example, when the battery energy storage device BESS supplies power according to an instantaneous load change, the battery energy storage device BESS is preferentially supplied with a charge state of the battery energy storage device BESS. May be operated so that power is supplied sequentially from the renewable energy generation device RG and the fuel cell system FC before it falls below 80%. The present invention can increase the capacity and life of the battery by maintaining the state of charge (SOC) of the battery energy storage device (BESS) at the same level.
또한, 상기 배터리 에너지 저장장치(BESS)는 배터리 시스템 관리를 위한 배터리 제어 장치(battery management system, BMS)를 더 포함할 수 있다. 상기 배터리 제어 장치(BMS)는 1차적으로 전원 버스부의 전압, 즉 기준전압을 일정하게 제어 및 유지하고, 배터리 에너지 저장장치(BESS)의 충전 상태(SOC)를 설정된 수준으로 유지하는 한편 본 발명에 따른 신재생 하이브리드 발전 장치의 가동 시 배터리 에너지 저장장치(BESS)의 전력 충전 등을 통하여 배터리 에너지 저장장치(BESS)의 충전 상태(SOC), 즉 충전 전력량 및 방전 전력량이나 배터리 용량을 제어부(EMS)로 상시 송신하는 역할을 수행할 수 있다.In addition, the battery energy storage device BESS may further include a battery management system (BMS) for battery system management. The battery controller BMS primarily controls and maintains the voltage of the power bus unit, that is, the reference voltage, and maintains the state of charge SOC of the battery energy storage device BESS at a predetermined level. Control the charging state SOC of the battery energy storage device BESS, that is, the charging power amount and the discharge power amount or the battery capacity through the power charging of the battery energy storage device BESS when the new renewable hybrid power generation device operates. It can serve as a regular transmission.
마지막으로, 전력변환장치(power conversion system, PCS)는 전원 버스부와 부하 사이에 위치하여 전원 버스부로부터 공급된 전력을 1 이상의 부하에 공급되도록 전력을 변환하는 역할을 수행할 수 있다. 구체적으로, 상기 전력변환장치(PCS)는 전원 버스부와 연계되어 전원 버스부로부터 공급된 전력을 직류(DC)에서 교류(AC)로 변환하여 1 이상의 부하에 공급할 수 있다.Lastly, the power conversion system (PCS) may be positioned between the power bus unit and the load to convert power so that the power supplied from the power bus unit is supplied to one or more loads. Specifically, the power converter (PCS) may be connected to the power bus unit to convert the power supplied from the power bus unit from DC to AC to supply one or more loads.
또한, 상기 전력변환장치(PCS)는 출력 기준전압이 하기 식 2를 만족하도록 설정될 수 있다:In addition, the power converter PCS may be set such that an output reference voltage satisfies Equation 2:
[식 2] VRG ≥ VPCS > VFC Equation 2 V RG ≥ V PCS > V FC
식 2에서,In equation 2,
VRG는 재생 에너지 발전 장치(RG)의 출력 기준전압이고,V RG is the output reference voltage of the renewable energy generator (RG),
VFC는 연료 전지 시스템(FC) 의 출력 기준전압이고,V FC is the output reference voltage of the fuel cell system (FC),
VPCS는 전력변환장치(PCS)의 출력 기준전압이다.V PCS is the output reference of the power converter (PCS).
본 발명은 전력변환장치(PCS)의 출력 기준전압을 식 2의 조건을 만족할 수 있도록 연료 전지 시스템(FC)의 출력 기준전압보다 크고, 재생 에너지 발전 장치(RG)의 출력 기준전압보다 작거나 동등하게 제어함으로써 배터리 에너지 저장장치(BESS)의 충전 효율을 높여 베터리의 충전 상태(SOC)를 용이하게 제어할 수 있다.According to the present invention, the output reference voltage of the power converter (PCS) is greater than the output reference voltage of the fuel cell system (FC) so as to satisfy the condition of Equation 2, and is less than or equal to the output reference voltage of the renewable energy generator (RG). In this case, the charging state SOC of the battery can be easily controlled by increasing the charging efficiency of the battery energy storage device BESS.
한편, 본 발명에 따른 신재생 에너지 하이브리드 발전 시스템은 전원 버스부에 재생 에너지 발전 장치(RG), 연료 전지 시스템(FC) 및 배터리 에너지 저장장치(battery energy storage system, BESS) 이외에 개별 전원으로서 수퍼 캐패시터(super capacitor, SC)를 더 포함할 수 있다. 수퍼 캐패시터(SC)는 수초 내지 수분의 순시적인 부하 변화에 대하여 빠른 동작 대응 가능하다. 따라서, 수퍼 캐패시터(SC)를 전원 버스부의 개별 전원으로 포함하되 수퍼 캐패시터(SC)의 출력 기준전압을 연료 전지 시스템(FC)과 동등하거나 높게 설정하는 경우, 배터리 에너지 저장장치(BESS) 보다 먼저 부하 대응하므로 배터리 에너지 저장장치(BESS)의 배터리 방전량(depth of discharge, DOD)을 저감시켜 배터리 수명을 연장시킬 수 있을 뿐만 아니라 신재생 하이브리드 발전 시스템의 안정성 확보가 유리한 효과가 있다. Meanwhile, the renewable energy hybrid power generation system according to the present invention is a supercapacitor as a separate power source in addition to the renewable energy generation device RG, the fuel cell system FC and the battery energy storage system BESS. (super capacitor, SC) may further include. The supercapacitor SC can respond quickly to changes in the load of several seconds to several minutes. Therefore, when the supercapacitor SC is included as an individual power source of the power bus unit, but the output reference voltage of the supercapacitor SC is set equal to or higher than that of the fuel cell system FC, the load is earlier than the battery energy storage device BESS. As a result, the battery life can be extended by reducing the battery discharge amount (DOD) of the battery energy storage device (BESS), and the stability of the renewable energy generation system is advantageous.
또한, 본 발명은 일실시예에서, 본 발명에 따른 상기 신재생 하이브리드 발전 시스템을 이용한 발전 방법을 제공한다.In addition, the present invention provides a power generation method using the renewable renewable power generation system according to the present invention.
본 발명에 따른 신재생 하이브리드 발전 방법은 재생 에너지 발전 장치(RG), 연료 전지 시스템(FC) 및 배터리 에너지 저장장치(BESS)를 이용하여 에너지 저장 시스템의 용량 증대를 위한 설비 비용이 낮고 순시적인 부하 변화에 즉각적으로 대응할 수 있을 뿐만 아니라 연료 전지 시스템의 단위 모듈화를 통하여 부하추종속도에 따른 느린 발전 속도를 향상시키는 효과가 우수하고, 배터리의 방전량을 낮추어 수명을 개선하는 효과가 우수한 이점이 있다.Renewable hybrid power generation method according to the present invention using a renewable energy generator (RG), a fuel cell system (FC) and a battery energy storage device (BESS) is a low equipment cost and instantaneous load for increasing the capacity of the energy storage system Not only can it immediately respond to changes, it is also excellent in the effect of improving the slow generation speed according to the load tracking speed through the modular unit of the fuel cell system, and has the advantage of improving the life by lowering the discharge amount of the battery.
본 발명에 따른 신재생 에너지 하이브리드 발전 시스템은 재생 에너지 발전 장치(RG), 연료 전지 시스템(FC) 및 배터리 에너지 저장장치(BESS)를 포함하여 에너지 저장 시스템의 용량 증대를 위한 설비 비용이 낮고 순시적인 부하 변화에 즉각적으로 대응할 수 있을 뿐만 아니라 연료 전지 시스템의 단위 모듈화를 통하여 부하추종속도에 따른 느린 발전 속도를 향상시키는 효과가 우수하고, 배터리의 방전량을 낮추어 수명을 개선하는 효과가 우수한 이점이 있다.The renewable energy hybrid power generation system according to the present invention includes a renewable energy generation device (RG), a fuel cell system (FC) and a battery energy storage device (BESS) is low and instantaneous equipment cost for increasing the capacity of the energy storage system Not only can it respond immediately to load changes, but also has the advantage of improving the slow generation speed according to the load tracking speed through unit modularization of the fuel cell system, and has the advantage of improving the life by lowering the discharge amount of the battery. .

Claims (11)

  1. 전원으로서 재생 에너지 발전 장치(RG), 연료 전지 시스템(FC) 및 배터리 에너지 저장장치(BESS)가 개별 접속된 전원 버스부; 및 상기 전원 버스부에 접속되고, 전원 버스부로부터 공급된 전력이 1 이상의 부하에 공급되도록 전력을 제어하는 전력변환장치(PCS)를 포함하며,A power supply bus unit to which a renewable energy generation device RG, a fuel cell system FC, and a battery energy storage device BESS are individually connected as a power source; And a power converter (PCS) connected to the power bus unit and controlling power so that power supplied from the power bus unit is supplied to at least one load.
    상기 연료 전지 시스템(FC)은 각각 개별적으로 운전되는 복수개의 연료 전지 모듈을 구비하는 신재생 에너지 하이브리드 발전 시스템.The fuel cell system (FC) is a renewable energy hybrid power generation system having a plurality of fuel cell modules that are each operated individually.
  2. 제1항에 있어서,The method of claim 1,
    연료 전지 시스템(FC)은 2 내지 100개의 연료 전지 모듈을 구비하는 신재생 에너지 하이브리드 발전 시스템.The fuel cell system (FC) is a renewable energy hybrid power generation system having 2 to 100 fuel cell modules.
  3. 제1항에 있어서,The method of claim 1,
    연료 전지 모듈은,Fuel cell module,
    전원 공급원으로부터 공급받은 전력으로 전해조에 있는 초순수를 전기 분해하여 수소(H2)를 발생시키는 수전해부;A water discharging unit for generating hydrogen (H 2 ) by electrolyzing ultrapure water in an electrolytic cell with power supplied from a power supply source;
    수전해부와 연결되어 발생된 수소(H2)를 저장하는 수소(H2) 저장부;A hydrogen (H 2 ) storage unit for storing hydrogen (H 2 ) generated in connection with the hydrolysis unit;
    수소 저장부(H2)와 연결되어 저장된 수소(H2)를 공급받고, 공급된 수소(H2)로부터 전력과 초순수를 생성하는 스택을 포함하는 연료 전지부; 및A fuel cell unit including a stack connected to a hydrogen storage unit (H 2 ) to receive stored hydrogen (H 2 ) and to generate electric power and ultrapure water from the supplied hydrogen (H 2 ); And
    연료 전지부와 연결되어 생성된 초순수를 수전해부의 전해조에 공급하는 수 공급부를 포함하는 신재생 에너지 하이브리드 발전 시스템.Renewable energy hybrid power generation system including a water supply unit for supplying the ultra-pure water generated in connection with the fuel cell unit to the electrolytic cell of the receiving portion.
  4. 제3항에 있어서,The method of claim 3,
    연료 전지 모듈은,Fuel cell module,
    연료 전지부에서 발생하는 폐열을 집열시키는 집열부; 및A collecting unit for collecting waste heat generated in the fuel cell unit; And
    집열부의 열원을 열 교환에 의해 수전해부의 전해조로 전달하는 열 교환부를 더 포함하는 신재생 에너지 하이브리드 발전 시스템.Renewable energy hybrid power generation system further comprising a heat exchanger for transferring the heat source of the heat collecting portion to the electrolytic cell of the receiving portion by heat exchange.
  5. 제3항 또는 제4항에 있어서,The method according to claim 3 or 4,
    전해조의 온도는 50℃ 내지 90℃로 유지되는 신재생 에너지 하이브리드 발전 시스템.Renewable energy hybrid power generation system wherein the temperature of the electrolytic cell is maintained at 50 ℃ to 90 ℃.
  6. 제1항에 있어서,The method of claim 1,
    전원 버스부에 접속된 각 전원은 하기 식 1을 만족(단, VRG=VFC, VFC=VBESS 및 VBESS=0인 경우는 제외)하는 출력 기준전압이 설정되고, 전원 버스부의 전압에 따라 독립적으로 자동 가동하는 신재생 에너지 하이브리드 발전 시스템:Each power source connected to the power supply bus unit satisfies the following formula 1 (except when V RG = V FC , V FC = V BESS and V BESS = 0), and an output reference voltage is set, and the voltage Renewable energy hybrid power generation systems that operate independently and independently according to:
    [식 1] VRG ≥ VFC ≥ VBESS Equation 1 V RG ≥ V FC ≥ V BESS
    식 1에서,In equation 1,
    VRG는 재생 에너지 발전 장치(RG)의 출력 기준전압이고,V RG is the output reference voltage of the renewable energy generator (RG),
    VFC는 연료 전지 시스템(FC)의 출력 기준전압이며,V FC is the output reference of the fuel cell system (FC),
    VBESS는 배터리 에너지 저장장치(BESS)의 출력 기준전압이다.V BESS is the output reference of the battery energy storage (BESS).
  7. 제1항에 있어서,The method of claim 1,
    배터리 에너지 저장장치(BESS)는 80% 이상의 충전 상태(SOC)를 유지하는 것을 특징으로 하는 신재생 에너지 하이브리드 발전 시스템.The battery energy storage device (BESS) is a renewable energy hybrid power generation system, characterized in that to maintain a state of charge (SOC) of more than 80%.
  8. 제1항에 있어서,The method of claim 1,
    각 전원은 전원 버스부의 전압에 따라 설정된 출력 기준전압에 맞춰 운전 시퀀스를 갖는 드룹(droop) 제어 방식으로 제어되는 신재생 에너지 하이브리드 발전 시스템.A renewable energy hybrid power generation system in which each power source is controlled by a droop control method having an operation sequence according to an output reference voltage set according to a voltage of a power bus unit.
  9. 제1항에 있어서,The method of claim 1,
    전원 버스부는 직류 버스형(DC-Bus type)인 것을 특징으로 하는 신재생 에너지 하이브리드 발전 시스템.Renewable energy hybrid power generation system, characterized in that the power supply bus unit (DC-Bus type).
  10. 제1항에 있어서,The method of claim 1,
    재생 에너지 발전 장치(RG)는 태양광 발전기, 태양열 발전기, 풍력 발전기, 수력 발전기, 계단의 압전 에너지 블록 시스템, 전동기의 회생제동 에너지 시스템, 지열 발전기 및 조력 발전기로 이루어진 군으로부터 선택되는 1종 이상의 발전 시스템을 포함하는 신재생 에너지 하이브리드 발전 시스템.Renewable energy generators (RG) are one or more generations selected from the group consisting of solar generators, solar generators, wind generators, hydraulic generators, piezoelectric energy block systems on stairs, regenerative braking energy systems on electric motors, geothermal generators and tidal generators. Renewable energy hybrid power generation system comprising a system.
  11. 제1항에 있어서,The method of claim 1,
    전력변환장치(PCS)의 출력전압은 하기 식 2를 만족하도록 설정되는 신재생 에너지 하이브리드 발전 시스템:Renewable energy hybrid power generation system wherein the output voltage of the power converter (PCS) is set to satisfy the following equation 2:
    [식 2] VRG ≥ VPCS > VFC Equation 2 V RG ≥ V PCS > V FC
    식 2에서,In equation 2,
    VRG는 재생 에너지 발전 장치(RG)의 출력 기준전압이고,V RG is the output reference voltage of the renewable energy generator (RG),
    VFC는 연료 전지 시스템(FC) 의 출력 기준전압이고,V FC is the output reference voltage of the fuel cell system (FC),
    VPCS는 전력변환장치(PCS)의 출력 기준전압이다.V PCS is the output reference of the power converter (PCS).
PCT/KR2018/012579 2018-08-22 2018-10-23 New renewable energy hybrid power-generation system and power-generation method therefor WO2020040350A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020180097755A KR102306918B1 (en) 2018-08-22 2018-08-22 Renewable energy hybrid power generation system, and power generation method therefor
KR10-2018-0097755 2018-08-22

Publications (1)

Publication Number Publication Date
WO2020040350A1 true WO2020040350A1 (en) 2020-02-27

Family

ID=69592728

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2018/012579 WO2020040350A1 (en) 2018-08-22 2018-10-23 New renewable energy hybrid power-generation system and power-generation method therefor

Country Status (2)

Country Link
KR (1) KR102306918B1 (en)
WO (1) WO2020040350A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112701709A (en) * 2020-12-29 2021-04-23 苏州中车氢能动力技术有限公司 Power supply control method and device for base station and electronic equipment
CN113846340A (en) * 2021-09-22 2021-12-28 宝武清洁能源有限公司 Hydrogen energy management system
CN115102153A (en) * 2022-07-11 2022-09-23 西安交通大学 Electro-optical hydrogen storage micro-grid for transformer substation and control method thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220047433A (en) 2020-10-08 2022-04-18 신대섭 Solar-hydrogen-based power generation device and power generation method using thereof
KR102573283B1 (en) 2021-08-02 2023-09-06 한국에너지기술연구원 Power conversion system for salinity gradient power generation
KR102611120B1 (en) 2021-11-17 2023-12-08 한국에너지기술연구원 Reverse electrodialysis stack assembly and power generator using the same
US20230335990A1 (en) * 2022-04-18 2023-10-19 Ohmium International, Inc. Frequency droop to coordinate hydrogen production

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003257443A (en) * 2002-02-28 2003-09-12 Ebara Corp Natural energy power generation device and self- completion type power generation system having fuel cell
KR20120071288A (en) * 2010-12-22 2012-07-02 지에스퓨얼셀 주식회사 Fuel cell system
KR20130073244A (en) * 2011-12-23 2013-07-03 한국항공우주연구원 The active power management system for hybrid electric power sources and method thereof
KR20150025772A (en) * 2013-08-30 2015-03-11 대우조선해양 주식회사 Distribution system and distribution method for floating structures
KR20150118597A (en) * 2014-04-14 2015-10-23 엘에스산전 주식회사 energy storage system with checking function
KR20160081216A (en) * 2014-12-31 2016-07-08 한국전력공사 Independent type microgrid system
KR20160122873A (en) * 2015-04-14 2016-10-25 현대제철 주식회사 Total management system having dispersion type fuel cell controller and method of controlling the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100906993B1 (en) 2007-11-09 2009-07-08 한국에너지기술연구원 Power control system for fuel cell hybrid power system and Power control method
KR101098521B1 (en) * 2010-08-27 2011-12-26 현대산업개발 주식회사 Hybrid power supply system
KR20170026695A (en) 2015-08-26 2017-03-09 데스틴파워 주식회사 Hybrid energy storage system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003257443A (en) * 2002-02-28 2003-09-12 Ebara Corp Natural energy power generation device and self- completion type power generation system having fuel cell
KR20120071288A (en) * 2010-12-22 2012-07-02 지에스퓨얼셀 주식회사 Fuel cell system
KR20130073244A (en) * 2011-12-23 2013-07-03 한국항공우주연구원 The active power management system for hybrid electric power sources and method thereof
KR20150025772A (en) * 2013-08-30 2015-03-11 대우조선해양 주식회사 Distribution system and distribution method for floating structures
KR20150118597A (en) * 2014-04-14 2015-10-23 엘에스산전 주식회사 energy storage system with checking function
KR20160081216A (en) * 2014-12-31 2016-07-08 한국전력공사 Independent type microgrid system
KR20160122873A (en) * 2015-04-14 2016-10-25 현대제철 주식회사 Total management system having dispersion type fuel cell controller and method of controlling the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112701709A (en) * 2020-12-29 2021-04-23 苏州中车氢能动力技术有限公司 Power supply control method and device for base station and electronic equipment
CN113846340A (en) * 2021-09-22 2021-12-28 宝武清洁能源有限公司 Hydrogen energy management system
CN113846340B (en) * 2021-09-22 2024-05-28 宝武清洁能源有限公司 Hydrogen energy management system
CN115102153A (en) * 2022-07-11 2022-09-23 西安交通大学 Electro-optical hydrogen storage micro-grid for transformer substation and control method thereof
CN115102153B (en) * 2022-07-11 2024-05-24 西安交通大学 Electro-optical hydrogen storage micro-grid for transformer substation and control method thereof

Also Published As

Publication number Publication date
KR20200022082A (en) 2020-03-03
KR102306918B1 (en) 2021-09-30

Similar Documents

Publication Publication Date Title
WO2020040350A1 (en) New renewable energy hybrid power-generation system and power-generation method therefor
CN104065157B (en) Uninterruptible power supply with improved power supply reliability
US8766590B2 (en) Energy storage system of apartment building, integrated power management system, and method of controlling the system
CN107431373A (en) Adaptive battery group
WO2012033254A1 (en) Energy storage system and controlling method of the same
WO2017142218A1 (en) Energy storage system and system operating method
CN102074970A (en) Energy management system and grid-connected energy storage system including the energy management system
EP3940914A1 (en) Energy storage system
KR102223896B1 (en) Renewable energy hybrid power generation system, and power generation method therefor
CN111181185A (en) Direct-current micro-grid system applying fuel cell and control method
CN211089487U (en) High-voltage direct-current remote power supply system of 5G base station
CN115102153A (en) Electro-optical hydrogen storage micro-grid for transformer substation and control method thereof
WO2019107802A1 (en) Energy storage system
CN209056972U (en) Nickel-metal hydride battery UPS control system
CN111769542A (en) DC power supply system for 220kV intelligent energy station
US8525369B2 (en) Method and device for optimizing the use of solar electrical power
WO2019151656A1 (en) Ess output distribution method and device
CN220754388U (en) High-integration battery energy storage system
CN114221386A (en) 500kVA light, wind, diesel, hydrogen, electricity and energy storage multifunctional complementary power supply device and power supply method thereof
KR20140013553A (en) Hybrid photovoltaic system
CN114597938A (en) Aluminum-air battery hybrid power supply system and control method thereof
CN212543374U (en) Direct-current power supply system for 110kV intelligent energy station
CN208423808U (en) A kind of distributed energy storage system for low-voltage distribution network
CN111769580A (en) Direct current power supply system for 110kV intelligent energy station
CN111371165A (en) Light storage and charging integrated machine and system suitable for flow battery

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18931251

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18931251

Country of ref document: EP

Kind code of ref document: A1