WO2021082423A1 - 一种直流耦合制氢***及其控制方法 - Google Patents

一种直流耦合制氢***及其控制方法 Download PDF

Info

Publication number
WO2021082423A1
WO2021082423A1 PCT/CN2020/093091 CN2020093091W WO2021082423A1 WO 2021082423 A1 WO2021082423 A1 WO 2021082423A1 CN 2020093091 W CN2020093091 W CN 2020093091W WO 2021082423 A1 WO2021082423 A1 WO 2021082423A1
Authority
WO
WIPO (PCT)
Prior art keywords
converter
hydrogen production
preset threshold
value
new energy
Prior art date
Application number
PCT/CN2020/093091
Other languages
English (en)
French (fr)
Inventor
谷雨
李江松
徐君
王腾飞
Original Assignee
阳光电源股份有限公司
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 阳光电源股份有限公司 filed Critical 阳光电源股份有限公司
Priority to EP20883310.3A priority Critical patent/EP3965249A4/en
Priority to AU2020377230A priority patent/AU2020377230B2/en
Publication of WO2021082423A1 publication Critical patent/WO2021082423A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/50—Processes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/50—Processes
    • C25B1/55—Photoelectrolysis
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/02—Process control or regulation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
    • G06Q50/06—Energy or water supply
    • 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
    • H02J15/00—Systems for storing electric energy
    • H02J15/008—Systems for storing electric energy using hydrogen as energy vector
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • H02J2300/26—The renewable source being solar energy of photovoltaic origin involving maximum power point tracking control for photovoltaic sources
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • 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
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/133—Renewable energy sources, e.g. sunlight

Definitions

  • the invention relates to the technical field of automatic control, in particular to a direct current coupling hydrogen production system and a control method thereof.
  • Figure 1 shows a typical DC-coupled off-grid hydrogen production system; the DC power generated by the PV system is output to multiple hydrogen production tank systems through the DC/DC converter (or the AC power generated by the fan system through the AC/DC converter).
  • the electrolytic cell in each hydrogen production tank system replaces the hydrogen in the water, and then the obtained hydrogen and oxygen are transported to the hydrogen storage/oxygen system.
  • the hydrogen production tank system mostly uses lye electrolyzers to electrolyze hydrogen, but lye electrolyzers have minimum current/voltage restrictions, and the power of new energy sources is fluctuating. If the restrictions cannot be met, the As a result, the purity of the gas produced by the lye electrolyzer is low, the shutdown is active, and even safety hazards are caused.
  • battery energy storage is introduced in order to maximize the use of new energy power while overcoming the minimum current/voltage limit requirements of the lye electrolyzer, the cost will not be negligible, resulting in poor system economy.
  • the present invention provides a DC-coupled hydrogen production system and a control method thereof to solve the problem of poor system economy caused by the introduction of battery energy storage in the prior art.
  • the first aspect of the present invention provides a DC-coupled hydrogen production system, including: a new energy system, a first converter, a hydrogen production tank system, a second converter, a conversion device, and a communication unit; wherein:
  • the new energy system is connected to the hydrogen production tank system through the first converter, and the new energy system is connected to the grid through the second converter and the conversion device in turn;
  • the communication unit is respectively communicatively connected with the first converter, the second converter and the hydrogen production tank system;
  • the first converter is used to provide hydrogen production electrical energy to the hydrogen production tank system when the output electrical energy of the new energy system is greater than a preset threshold;
  • the second converter is used for grid-connected output through the converter when the output electric energy of the new energy system is less than or equal to the preset threshold.
  • the hydrogen production tank of the hydrogen production tank system is any one of an alkaline solution electrolysis tank, a PEM electrolysis tank and a solid oxide electrolysis tank;
  • the preset threshold value is the minimum power requirement value of the alkaline solution electrolysis tank.
  • the second converter is a bidirectional converter
  • the conversion device is a bidirectional converter
  • the electric energy output branch of the new energy system is further provided with a controllable switch
  • the controllable switch is used to open when the output electric energy of the new energy system is less than or equal to the start-up threshold and the current moment is in the grid price stage, and to close at other times;
  • the second converter is further configured to receive the grid power through the conversion device for reverse conversion when the output power of the new energy system is less than or equal to the start-up threshold and the current time is in the grid price stage;
  • the first converter is also used to receive the electric energy from the second converter when the output electric energy of the new energy system is less than or equal to the start-up threshold and the current time is in the grid price stage, and to produce hydrogen to the The tank system provides electricity for hydrogen production.
  • the first converter and the second converter adopt master-slave control; or,
  • the DC-coupled hydrogen production system further includes: a system controller connected to the communication unit for realizing centralized control of the DC-coupled hydrogen production system.
  • the communication unit is installed independently, or integrated in any one of the first converter and the second converter.
  • the first converter is a DC/DC converter
  • the second converter is a DC/AC converter or a DC/DC converter connected in series and a DC /AC converter
  • the first converter is an AC/DC converter or an AC/DC converter and a DC/DC converter connected in series
  • the second converter is an AC/AC converter Device.
  • Control methods include:
  • the second converter is controlled to be in a standby state, and the first converter provides a system to the hydrogen production tank system in the DC-coupled hydrogen production system. Hydrogen power
  • the first converter is maintained in a standby state, and the second converter is connected to the grid through a conversion device.
  • performing MPPT calculation and judging whether the output electric energy of the new energy system in the DC-coupled hydrogen production system is greater than a preset threshold according to the calculation information obtained by the calculation includes:
  • the preset threshold value includes: a first preset threshold value and a second preset threshold value, and the first preset threshold value is greater than or equal to the second preset threshold value;
  • Determining whether the power value of the maximum power point is greater than the preset threshold value includes:
  • the power value of the maximum power point rises to be greater than the first preset threshold value, and does not fall below the second preset threshold value, then it is determined that the power value of the maximum power point is greater than the preset threshold value .
  • the preset threshold value is the minimum power requirement value of the lye electrolyzer, which is equal to the minimum current of the lye electrolyzer
  • the product of the required value and the minimum voltage required value, and in the control method of the DC-coupled hydrogen production system, determining whether the power value of the maximum power point is greater than the preset threshold includes:
  • the formula used to calculate the theoretical value of the hydrogen production current of the lye electrolyzer according to the power value of the maximum power point includes:
  • Uin is the theoretical value of the hydrogen production voltage of the lye electrolyzer
  • Iin is the theoretical value of the hydrogen production current of the lye electrolyzer
  • U_limit is the minimum voltage required value of the lye electrolyzer
  • Pmpp is the The power value at the maximum power point
  • Req is the equivalent resistance of the alkaline electrolyte electrolyzer.
  • the control method of the DC coupling hydrogen production system controls the first converter in the DC coupling hydrogen production system to be in standby Before the second converter performs grid-connected output through the conversion device, it also includes:
  • control method of the DC-coupled hydrogen production system further includes:
  • the controllable switch is controlled to be turned off, and the second converter receives grid power through the conversion device.
  • the first converter receives electric energy from the second converter and provides hydrogen production electric energy to the hydrogen production tank system.
  • the first converter provides hydrogen production power to the hydrogen production tank system only when the output power of the new energy system is greater than the preset threshold; while the output power of the new energy system is less than or equal to
  • the second converter is used for grid-connected output through the conversion device; therefore, even if the hydrogen production tank of the hydrogen production tank system is an alkaline electrolyte electrolyzer, the above principles can also take into account the maximum utilization of new energy power. , And the minimum current/voltage limit requirements of the lye electrolyzer, and there is no need to introduce battery energy storage, which avoids the problem of poor economy caused by the installation of battery energy storage.
  • Figure 1 is a schematic structural diagram of a DC-coupled off-grid hydrogen production system provided by the prior art
  • Figure 2 is a schematic structural diagram of a DC-coupled hydrogen production system provided by an embodiment of the present invention
  • Figure 3a is a schematic structural diagram of a DC-coupled photovoltaic hydrogen production system provided by an embodiment of the present invention
  • Figure 3b is a schematic structural diagram of a DC-coupled wind power hydrogen production system provided by an embodiment of the present invention.
  • FIG. 4 is a flowchart of a method for controlling a DC-coupled hydrogen production system according to an embodiment of the present invention
  • Fig. 5 is a partial flowchart of a control method of a DC-coupled hydrogen production system provided by an embodiment of the present application.
  • the invention provides a direct current coupling hydrogen production system to solve the problem of poor system economy caused by the introduction of battery energy storage in the prior art.
  • the DC-coupled hydrogen production system includes: a new energy system 101, a first converter 102, a hydrogen production tank system 104, a second converter 103, a conversion device 105, and a communication unit 106; among them:
  • the new energy system 101 is connected to the hydrogen production tank system 104 through the first converter 102, and the new energy system 101 is connected to the grid through the second converter 103 and the conversion device 105 in turn.
  • the new energy system 101 can be a photovoltaic power generation system (as shown in Figure 3a) or a wind power generation system (as shown in Figure 3b).
  • the photovoltaic power generation system includes at least one photovoltaic string; each photovoltaic string is connected in parallel, and the two ends of the parallel connected are used as the output terminals of the new energy system 101.
  • the photovoltaic string can be composed of photovoltaic modules of various power levels currently on the market, and can form a photovoltaic 1000V system, or a 1500V system, or even a photovoltaic system with a higher voltage level; there is no specific limitation here, depending on the application environment However, they are all within the scope of protection of this application.
  • the new energy system 101 is a photovoltaic power generation system, as shown in FIG.
  • the first converter 102 is a DC/DC converter
  • the second converter 103 is a DC/AC converter or a series-connected DC/DC converter and DC/AC converter;
  • the DC/DC converter can be an isolated topology, or a non-isolated topology, a boost topology, a buck topology, or a boost/buck topology, It can be a resonant topology or a non-resonant topology. It can be a full-bridge structure or a half-bridge structure. It can be a two-level topology or a three-level topology; there are no specific restrictions here, depending on its application environment. Are all within the scope of protection of this application.
  • the DC/AC converter in the second converter 103 can be a two-level topology, a three-level topology, an isolated topology, or a non-isolated topology; there is no specific limitation here, depending on its application environment , Are all within the protection scope of this application.
  • Wind power generation system including: wind turbine, and, DFIG (Doubly fed Induction Generator, double-fed induction motor) or PMSG (permanent magnet synchronous generator, permanent magnet synchronous generator); wind turbine through DFIG or PMSG for electrical output, DFIG or PMSG
  • the output terminal serves as the output terminal of the new energy system 101.
  • the first converter 102 is an AC/DC converter or an AC/DC converter and a DC/DC converter connected in series
  • the second converter 103 is AC/AC converter.
  • the AC/DC converter is an isolated topology, a boost topology, a buck topology, a boost/buck topology, a two-level topology, a three-level topology, or a full bridge
  • the topology may also be a half-bridge topology; there is no specific limitation here, depending on its application environment, and all are within the protection scope of this application.
  • the conversion device 105 may be a solid-state power electronic transformer or a box-type transformer; the power grid to which the conversion device 105 is connected is a high-voltage power grid, and the high-voltage power grid may be a power grid with a voltage level of 16KV or a power grid with a voltage level of 35KV; There is no specific limitation here, and it depends on the application environment, and all are within the protection scope of this application.
  • the communication unit 106 is respectively connected to the first converter 102, the second converter 103 and the hydrogen production tank system 104; the communication connection can be wired or wireless according to the actual application environment. All restrictions are within the scope of protection of this application.
  • the communication unit 106 can be set independently, or it can be integrated in any one of the first converter 102 and the second converter 103, depending on its application environment, and both are within the protection scope of the present application.
  • the DC-coupled hydrogen production system can be neutralized by the first converter 102 and the second converter 103, and master-slave control can be achieved through the communication unit 106; or, the DC-coupled hydrogen production system can also be connected to the communication unit 106 by setting
  • the system controller of the system controller comes through the communication unit 106 to achieve centralized control; it depends on its application environment, and they are all within the protection scope of this application.
  • the hydrogen production tank system 104 includes a hydrogen production tank and a control cabinet; the control cabinet is responsible for monitoring the tank pressure, tank temperature, hydrogen/oxygen level, etc. of the hydrogen production tank, generating corresponding voltage/current commands, and communicating
  • the unit 106 directly or indirectly transmits to the second converter 103, so that the second converter 103 can output electric energy according to the voltage/current command.
  • the hydrogen production tank can be any one of an alkaline solution electrolysis tank, a PEM electrolysis tank and a solid oxide electrolysis tank; there is no specific limitation here, and it depends on its specific application environment, and they are all within the scope of protection of this application. Inside.
  • the DC-coupled hydrogen production system combines the energy volatility of the new energy system 101 and the minimum current/voltage limit requirements of the lye electrolyzer gas production. Two working modes can be realized through corresponding control: one is when the new energy system 101 The output electric energy is less than or equal to the preset threshold.
  • the DC-coupled hydrogen production system switches out of the hydrogen production mode and switches to the grid-connected mode, that is, the second converter 103 is combined by the converter 105 Grid output, the energy of the new energy system 101 is delivered to the grid;
  • the DC-coupled hydrogen production system is cut out and connected to the grid Mode, switch to the hydrogen production mode, that is, the first converter 102 provides hydrogen production electric energy to the hydrogen production tank system 104.
  • the preset threshold refers to the minimum power requirement value of the lye electrolyzer.
  • the specific control strategy for the DC-coupled hydrogen production system to achieve the above principles is: after startup, the second converter 103 starts to work first and enters the grid connection.
  • the second converter 103 switches out of grid-connected mode and enters standby mode.
  • the first converter 102 starts to work, enters the hydrogen production mode, and outputs the energy of the new energy system 101 to the lye electrolyzer for hydrogen production;
  • Iin ⁇ I_limit the first converter 102 remains in the standby state, and the second The converter 103 still works in the grid-connected mode.
  • the minimum current required value I_limit for the gas produced by the lye electrolyzer is determined according to the actual lye electrolyzer system. It can be 30% of the rated current or 50% of the rated current; there is no specific limit here, depending on its application Depending on the environment, all are within the protection scope of this application.
  • the switching principle of the above-mentioned grid-connected/off-grid mode can be based on the same comparison threshold, such as the minimum current requirement I_limit for gas production in the lye electrolyzer; in practical applications, the hysteresis control strategy can also be adopted.
  • a higher comparison threshold is used, and when the current/power decreases, a lower comparison threshold is used.
  • the switching principle is the same as the above. No more detailed description here.
  • the first converter 102 provides hydrogen production power to the hydrogen production tank system 104 only when the output power of the new energy system 101 is greater than the preset threshold; while in the new energy system
  • the second converter 103 is connected to the grid through the converter 105; therefore, even if the hydrogen production tank of the hydrogen production tank system 104 is an alkaline electrolysis tank, it can pass through the above
  • the principle of on-grid/off-grid mode switching takes into account the maximum utilization of new energy power, as well as the minimum current/voltage limit requirements of the lye electrolyzer, and there is no need to introduce battery energy storage, which avoids the setting of battery energy storage. The problem of poor economy.
  • the DC-coupled hydrogen production system has simple structure, simple control, reliable operation, and easy implementation of the scheme.
  • the new energy system 101 when it is a photovoltaic power generation system, the photovoltaic modules have no energy output at night, and when it is a wind power generation system, the wind farm will also have a period of no wind. In both cases, considering the actual demand for hydrogen production, the grid electricity can be used to produce hydrogen.
  • the DC-coupled hydrogen production system is based on the previous embodiment, and its second converter 103 is a bidirectional converter.
  • the conversion device 105 selects the bidirectional conversion device 105, and the electric energy output branch of the new energy system 101 is also provided with a controllable switch (as shown by K in Fig. 2 to Fig. 3b); the controllable switch may be a circuit breaker, It may also be a switch device such as a contactor; there is no specific limitation here, and it depends on its application environment, and they are all within the protection scope of this application.
  • the communication host or system controller issues the valley electricity hydrogen production command through the communication unit 106 to cut off the controllable switch on the new energy system 101 side to prevent the grid side Energy is poured back into the new energy system 101, damaging photovoltaic modules and other devices; and the communication host or system controller also issues the received voltage/current command of the alkaline electrolyte electrolyzer to the first converter 102 through the communication unit 106, and the second conversion
  • the converter 103 works to rectify and output the grid-side energy; the first converter 102 performs corresponding output according to the received voltage/current command to realize hydrogen production from valley electricity.
  • the second converter 103 is also used to receive the grid electric energy through the conversion device 105 for reverse conversion; the first converter 102 It is also used to receive the electrical energy of the second converter 103 and provide hydrogen production electrical energy to the hydrogen production tank system 104.
  • the controllable switch can be turned off when the output power of the new energy system 101 is less than or equal to the start-up threshold and the current time is in the grid price stage; and in order to achieve the normal operation of the system, the controllable switch can be turned off at other times It should be in a closed state, which requires that after the system is started, the communication host or system controller first issues a new energy discharge command through the communication unit 106, and closes the controllable switch on the side of the new energy system 101 so that the energy on the new energy side can be used. Output to the first inverter 102 or the second inverter 103.
  • This embodiment can not only take into account the maximum utilization of new energy power and the minimum current/voltage limit requirements of the lye electrolyzer, but also the photovoltaic power generation system can also achieve hydrogen production from valley electricity at night, which is also useful for wind power generation systems. It can realize the hydrogen production from valley electricity during the windless period, thereby realizing the economic efficiency of hydrogen production.
  • Another embodiment of the present invention also provides a control method of a DC-coupled hydrogen production system, which is applied to the communication host or system controller in the DC-coupled hydrogen production system described in any of the above embodiments; as shown in FIG. 4 ,
  • the control method of the DC-coupled hydrogen production system includes:
  • step S102 includes:
  • S201 Perform an MPPT operation to determine the power value of the maximum power point.
  • S202 Determine whether the power value of the maximum power point is greater than a preset threshold.
  • Step S202 includes:
  • U_limit is the minimum voltage required value of the lye electrolyzer
  • Pmpp is the power value at the maximum power point
  • Req is the equivalent resistance of the lye electrolyzer.
  • the minimum current required value of the lye electrolyzer can be determined according to the actual lye electrolyzer. It can be 30% of its rated current, 50% of its rated current, or other ratios of rated current. Here It is not limited, and they are all within the protection scope of this application.
  • the power value of the maximum power point is greater than the preset threshold value. If the theoretical value of the hydrogen production current is less than or equal to the minimum current requirement value of the lye electrolyzer, it is determined that the power value of the maximum power point is less than or equal to the preset threshold.
  • step S202 includes: determining whether the power value of the maximum power point rises to greater than the first preset threshold, and does not fall below the second preset threshold; if the power value of the maximum power point rises When it is greater than the first preset threshold and does not fall below the second preset threshold, it is determined that the power value of the maximum power point is greater than the preset threshold.
  • the minimum current requirement may mean that the theoretical value of the hydrogen production current rises to greater than the first current threshold, and , Before falling to less than or equal to the second current threshold; the first current threshold is greater than or equal to the second current threshold, and the second current threshold is greater than or equal to the minimum current requirement value.
  • step S103 If the power value of the maximum power point is greater than the preset threshold, it is determined that the output power of the new energy system is greater than the preset threshold, and step S103 is executed; if the power value of the maximum power point is less than or equal to the preset threshold, the output power of the new energy system is determined If it is less than or equal to the preset threshold, step S104 is executed.
  • the above process can realize the switch of grid-connected/off-grid mode, to take into account the maximum utilization of new energy power, and the minimum current/voltage limit requirements of the lye electrolyzer, and there is no need to introduce battery energy storage, avoiding the need to install batteries. Poor economy caused by energy storage.
  • the DC-coupled hydrogen production system has simple structure, simple control, reliable operation, and easy implementation of the scheme.
  • control method of the DC-coupled hydrogen production system as shown in FIG. 4, before step S101, further includes:
  • the control method of the DC-coupled hydrogen production system further includes as shown in Fig. 5:
  • S401 Determine whether the output electric energy of the new energy system is less than or equal to the start-up threshold and whether it is in the grid price stage at the current moment;
  • step S402 is executed.
  • the controllable switch is controlled to be turned off, the second converter receives the grid electric energy through the conversion device for reverse conversion, and the first converter receives the electric energy of the second converter and provides hydrogen production electric energy to the hydrogen production tank system.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Inorganic Chemistry (AREA)
  • Economics (AREA)
  • Health & Medical Sciences (AREA)
  • Strategic Management (AREA)
  • Tourism & Hospitality (AREA)
  • Water Supply & Treatment (AREA)
  • General Health & Medical Sciences (AREA)
  • Human Resources & Organizations (AREA)
  • Marketing (AREA)
  • Public Health (AREA)
  • Automation & Control Theory (AREA)
  • Primary Health Care (AREA)
  • Physics & Mathematics (AREA)
  • General Business, Economics & Management (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

本发明提供的直流耦合制氢***及其控制方法，仅在其新能源***的输出电能大于预设阈值时，由第一变换器向制氢槽***提供制氢电能；而在新能源***的输出电能小于等于该预设阈值时，由第二变换器通过变换装置进行并网输出；因此，即便其制氢槽***的制氢槽为碱液电解槽，也能够通过上述原理兼顾新能源功率的最大化利用，以及碱液电解槽的最小电流/电压限制要求，而且无需引入电池储能，避免了因设置电池储能而导致的经济性差的问题。

Description

一种直流耦合制氢***及其控制方法
本申请要求于2019年10月28日提交中国专利局、申请号为201911031338.2、发明名称为“一种直流耦合制氢***及其控制方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及自动控制技术领域，特别涉及一种直流耦合制氢***及其控制方法。
背景技术
随着能源发展向着绿色、清洁的方向发展，氢气由于其利用产物是水，可以真正做到零排放、无污染，被看作是最具应用前景的清洁能源之一，在燃料电池、储能、新能源汽车等行业得到越来越广泛的应用。水电解制氢具有纯度高，效率高、排碳量少等优点，在众多制氢方式中脱颖而出。
图1所示为典型的直流耦合离网制氢***；PV***产生的直流电通过DC/DC变换器(或者风机***产生的交流电通过AC/DC变换器)，输出给多个制氢槽***，由各个制氢槽***中的电解槽将水中的氢置换出来，然后将得到的氢气和氧气输送至储氢/氧***。
实际应用中，制氢槽***多采用碱液电解槽来进行电解制氢，但碱液电解槽有最小电流/电压限制要求，而新能源功率具有波动性，若不能达到其限制要求，则将导致碱液电解槽的产气纯度低、主动停机，甚至会带来安全危险。而如果为了实现新能源功率的最大化利用，同时克服碱液电解槽的最小电流/电压限制要求，引入电池储能的话，其成本将无法忽略，导致***经济性差。
发明内容
有鉴于此，本发明提供一种直流耦合制氢***及其控制方法，以解决现有技术中因引入电池储能而导致***经济性差的问题。
为实现上述目的，本申请提供的技术方案如下：
本发明第一方面提供了一种直流耦合制氢***，包括：新能源***、第一变换器、制氢槽***、第二变换器、变换装置以及通信单元；其中：
所述新能源***通过所述第一变换器连接所述制氢槽***，且所述新能源***依次通过所述第二变换器和所述变换装置连接电网；
所述通信单元分别与所述第一变换器、所述第二变换器和所述制氢槽***通信连接；
所述第一变换器用于在所述新能源***的输出电能大于预设阈值时，向所述制氢槽***提供制氢电能；
所述第二变换器用于在所述新能源***的输出电能小于等于所述预设阈值时，通过所述变换装置进行并网输出。
优选的，所述制氢槽***的制氢槽为：碱液电解槽、PEM电解槽及固体氧化物电解槽中的任意一种；
并且，所述制氢槽***中的制氢槽为碱液电解槽时，所述预设阈值为所述碱液电解槽的最小功率要求值。
优选的，所述第二变换器为双向变换器，所述变换装置为双向变换装置，所述新能源***的电能输出支路上还设置有可控开关；
所述可控开关用于在所述新能源***的输出电能小于等于启机阈值且当前时刻处于电网谷价阶段时断开、在其他时间闭合；
所述第二变换器还用于在所述新能源***的输出电能小于等于所述启机阈值且当前时刻处于电网谷价阶段时，通过所述变换装置接收电网电能进行反向变换；
所述第一变换器还用于在所述新能源***的输出电能小于等于所述启机阈值且当前时刻处于电网谷价阶段时，接收所述第二变换器的电能，向所述制氢槽***提供制氢电能。
优选的，所述第一变换器中和所述第二变换器，采用主从控制；或者，
所述直流耦合制氢***还包括：与所述通信单元相连的***控制器，用于实现所述直流耦合制氢***的集中控制。
优选的，所述通信单元独立设置，或者，集成于所述第一变换器和所述第二变换器中任意一个的内部。
优选的，所述新能源***为光伏发电***时，所述第一变换器为DC/DC变换器，所述第二变换器为DC/AC变换器或者串联连接的DC/DC变换器及DC/AC变换器；
所述新能源***为风力发电***时，所述第一变换器为AC/DC变换器或者 串联连接的AC/DC变换器和DC/DC变换器，所述第二变换器为AC/AC变换器。
本发明另一方面还提供了一种直流耦合制氢***的控制方法，应用于如上述任一所述的直流耦合制氢***中的通信主机或者***控制器，所述直流耦合制氢***的控制方法包括：
启机后，控制所述直流耦合制氢***中的第一变换器处于待机状态、第二变换器通过变换装置进行并网输出；
进行MPPT(Maximum Power Point Tracking，最大功率点跟踪)运算，并根据运算得到的运算信息判断所述直流耦合制氢***中新能源***的输出电能是否大于预设阈值；
若所述新能源***的输出电能大于所述预设阈值，则控制所述第二变换器处于待机状态、所述第一变换器向所述直流耦合制氢***中的制氢槽***提供制氢电能；
若所述新能源***的输出电能小于等于所述预设阈值，则维持所述第一变换器处于待机状态、所述第二变换器通过变换装置进行并网输出。
优选的，进行MPPT运算，并根据运算得到的运算信息判断所述直流耦合制氢***中新能源***的输出电能是否大于预设阈值，包括：
进行所述MPPT运算，确定最大功率点的功率值；
判断所述最大功率点的功率值是否大于所述预设阈值；
若所述最大功率点的功率值大于所述预设阈值，则判定所述新能源***的输出电能大于所述预设阈值。
优选的，所述预设阈值包括：第一预设阈值和第二预设阈值，所述第一预设阈值大于等于所述第二预设阈值；
判断所述最大功率点的功率值是否大于所述预设阈值，包括：
判断所述最大功率点的功率值是否上升到大于所述第一预设阈值，并且，未下降到小于所述第二预设阈值；
若所述最大功率点的功率值上升到大于所述第一预设阈值，并且，未下降到小于所述第二预设阈值，则判定所述最大功率点的功率值大于所述预设阈值。
优选的，若所述制氢槽***中的制氢槽为碱液电解槽，则所述预设阈值为 所述碱液电解槽的最小功率要求值、等于所述碱液电解槽的最小电流要求值与最小电压要求值的乘积，并且所述直流耦合制氢***的控制方法中，判断所述最大功率点的功率值是否大于所述预设阈值，包括：
根据所述最大功率点的功率值计算得到所述碱液电解槽的制氢电流理论值；
判断所述制氢电流理论值是否满足所述碱液电解槽的最小电流要求；
若所述制氢电流理论值满足所述碱液电解槽的最小电流要求，则判定所述最大功率点的功率值大于所述预设阈值。
优选的，根据所述最大功率点的功率值计算得到所述碱液电解槽的制氢电流理论值所采用的公式包括：
Uin＝U_limit+(Pmpp*Req) 1/2和Iin＝Pmpp/Uin；
其中，Uin为所述碱液电解槽的制氢电压理论值，Iin为所述碱液电解槽的制氢电流理论值，U_limit为所述碱液电解槽的最小电压要求值，Pmpp为所述最大功率点的功率值，Req为所述碱液电解槽的等效电阻。
优选的，当所述新能源***的电能输出支路上还设置有可控开关时，所述直流耦合制氢***的控制方法，在控制所述直流耦合制氢***中的第一变换器处于待机状态、第二变换器通过变换装置进行并网输出之前，还包括：
控制所述可控开关闭合。
优选的，当所述第二变换器为双向变换器、所述变换装置为双向变换装置时，所述直流耦合制氢***的控制方法，还包括：
判断所述新能源***的输出电能是否小于等于启机阈值以及当前时刻是否处于电网谷价阶段；
若所述新能源***的输出电能小于等于所述启机阈值且当前时刻处于电网谷价阶段，则控制所述可控开关断开、所述第二变换器通过所述变换装置接收电网电能进行反向变换、所述第一变换器接收所述第二变换器的电能并向所述制氢槽***提供制氢电能。
本发明提供的直流耦合制氢***，仅在其新能源***的输出电能大于预设阈值时，由第一变换器向制氢槽***提供制氢电能；而在新能源***的输出电 能小于等于该预设阈值时，由第二变换器通过变换装置进行并网输出；因此，即便其制氢槽***的制氢槽为碱液电解槽，也能够通过上述原理兼顾新能源功率的最大化利用，以及碱液电解槽的最小电流/电压限制要求，而且无需引入电池储能，避免了因设置电池储能而导致的经济性差的问题。
附图说明
图1是现有技术提供的直流耦合离网制氢***的结构示意图；
图2是本发明申请实施例提供的直流耦合制氢***的结构示意图；
图3a是本发明申请实施例提供的直流耦合光伏制氢***的结构示意图；
图3b是本发明申请实施例提供的直流耦合风电制氢***的结构示意图；
图4是本发明申请实施例提供的直流耦合制氢***的控制方法的流程图；
图5是本发明申请实施例提供的直流耦合制氢***的控制方法的部分流程图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本发明提供一种直流耦合制氢***，以解决现有技术中因引入电池储能而导致***经济性差的问题。
请参见图2，该直流耦合制氢***，包括：新能源***101、第一变换器102、制氢槽***104、第二变换器103、变换装置105以及通信单元106；其中：
新能源***101通过第一变换器102连接制氢槽***104，且新能源***101依次通过第二变换器103和变换装置105连接电网。
实际应用中，该新能源***101可以是光伏发电***(如图3a所示)，也 可以是风力发电***(如图3b所示)。
光伏发电***，包括至少一个光伏组串；各个光伏组串并联，并联后的两端作为新能源***101的输出端。该光伏组串可以是目前市面上各种功率等级的光伏组件组成，可以组成光伏1000V***，也可以是1500V***，甚至更高电压等级的光伏***；此处不做具体限定，视其应用环境而定，均在本申请的保护范围内。当新能源***101是光伏发电***时，如图3a所示，第一变换器102为DC/DC变换器，第二变换器103为DC/AC变换器或者串联连接的DC/DC变换器及DC/AC变换器；作为第一变换器102的DC/DC变换器可以是隔离拓扑，也可以是非隔离拓扑，可以是升压拓扑，可以是降压拓扑，也可以是升/降压拓扑，可以是谐振拓扑，也可以是非谐振拓扑，可以是全桥结构，也可以半桥结构，可以是两电平拓扑，也可以是三电平拓扑；此处不做具体限定，视其应用环境而定，均在本申请的保护范围内。第二变换器103中的DC/AC变换器可以是两电平拓扑，可以是三电平拓扑，可以是隔离拓扑，可以是非隔离拓扑；此处也不做具体限定，视其应用环境而定，均在本申请的保护范围内。
风力发电***，包括：风机，和，DFIG(Doubly fed Induction Generator，双馈感应电机)或者PMSG(permanent magnet synchronous generator，永磁同步发电机)；风机通过DFIG或者PMSG进行电能输出，DFIG或者PMSG的输出端作为新能源***101的输出端。当新能源***101是风力发电***时，如图3b所示，第一变换器102为AC/DC变换器或者串联连接的AC/DC变换器和DC/DC变换器，第二变换器103为AC/AC变换器。该AC/DC变换器是隔离拓扑、可以是升压拓扑，可以是降压拓扑，也可以是升/降压拓扑，可以是两电平拓扑，也可以是三电平拓扑，可以是全桥拓扑，也可以是半桥拓扑；此处不 做具体限定，视其应用环境而定，均在本申请的保护范围内。
该变换装置105可以是固态电力电子变压器，也可以是箱变；该变换装置105所连接的电网为高压电网，该高压电网可以是16KV电压等级的电网，也可以是35KV等电压等级的电网；此处不做具体限定，视其应用环境而定，均在本申请的保护范围内。
如图2所示，通信单元106分别与第一变换器102、第二变换器103和制氢槽***104通信连接；该通信连接，可以根据实际应用环境选择有线或者无线通信方式，此处不做限定，均在本申请的保护范围内。该通信单元106可以是独立设置的，或者，也可以是集成于第一变换器102和第二变换器103中任意一个的内部，视其应用环境而定即可，均在本申请的保护范围内。
并且，该直流耦合制氢***可以通过第一变换器102中和第二变换器103，经该通信单元106实现主从控制；或者，该直流耦合制氢***也可以通过设置与通信单元106相连的***控制器，来经该通信单元106实现集中控制；视其应用环境而定即可，均在本申请的保护范围内。
该制氢槽***104中均包括制氢槽和控制柜；该控制柜负责监测制氢槽的槽压、槽温、氢/氧液位等情况，生成相应的电压/电流指令，并通过通信单元106直接或者间接的传输至第二变换器103，使第二变换器103能够根据该电压/电流指令进行电能输出。该制氢槽可以是碱液电解槽、PEM电解槽及固体氧化物电解槽中的任意一种；此处不做具体限定，视其具体应用环境而定即可，均在本申请的保护范围内。
具体的工作原理为：
该直流耦合制氢***，结合新能源***101能量的波动性及碱液电解槽产 气的最小电流/电压限制要求，通过相应的控制能够实现两种工作模式：一是当新能源***101的输出电能小于等于预设阈值，比如其能量不满足碱液电解槽要求时，该直流耦合制氢***切出制氢模式，切换到并网模式，即第二变换器103通过变换装置105进行并网输出、将新能源***101的能量输送给电网；二是当新能源***101的输出电能大于预设阈值，比如其能量满足碱液电解槽要求时，该直流耦合制氢***切出并网模式，切换到制氢模式，即第一变换器102向制氢槽***104提供制氢电能。
当制氢槽***104中的制氢槽为碱液电解槽时，该预设阈值是指碱液电解槽的最小功率要求值。
以碱液电解槽为例进行说明，无论采用主从控制还是集中控制，该直流耦合制氢***实现上述原理的具体控制策略均为：启机后第二变换器103先开始工作、进入并网模式，通信主机或者***控制器根据MPPT运算，确定最大功率点的功率值Pmpp，然后通过公式Uin＝U_limit+(Pmpp*Req) 1/2计算得到碱液电解槽的制氢电压理论值Uin，再通过公式Iin＝Pmpp/Uin计算得到碱液电解槽的制氢电流理论值Iin；其中U_limit为所述碱液电解槽的最小电压要求值，Req为所述碱液电解槽的等效电阻；然后再进行碱液电解槽的制氢电流理论值Iin与碱液电解槽产气的最小电流要求值I_limit之间的比较，当Iin>I_limit时，第二变换器103切出并网模式、进入待机模式，第一变换器102开始工作、进入制氢模式，将新能源***101的能量输出给碱液电解槽进行制氢；当Iin≤I_limit时，第一变换器102仍保持待机状态，第二变换器103仍工作在并网模式。其中，碱液电解槽产气的最小电流要求值I_limit，根据实际碱液电解槽***而定，可以是30％额定电流，也可以是50％额定电流；此处不做具 体限定，视其应用环境而定，均在本申请的保护范围内。
值得说明的是，上述并网/离网模式的切换原理，可以是基于同一个比较阈值的，比如碱液电解槽产气的最小电流要求值I_limit；实际应用中，也可以采用滞环控制策略进行并网/离网模式的切换，比如电流/功率升高时，采用一个较高的比较阈值，而在电流/功率下降时，采用一个较低的比较阈值，其切换原理与上述内容相同，此处不再详细说明。
本实施例提供的该直流耦合制氢***，仅在其新能源***101的输出电能大于预设阈值时，由第一变换器102向制氢槽***104提供制氢电能；而在新能源***101的输出电能小于等于该预设阈值时，由第二变换器103通过变换装置105进行并网输出；因此，即便其制氢槽***104的制氢槽为碱液电解槽，也能够通过上述并网/离网模式切换的原理，来兼顾新能源功率的最大化利用，以及，碱液电解槽的最小电流/电压限制要求，而且无需引入电池储能，避免了因设置电池储能而导致的经济性差的问题。并且，该直流耦合制氢***结构简单、控制简单、运行可靠、方案容易实现。
需要说明的是，对于新能源***101而言，当其为光伏发电***时，夜间光伏组件无能量输出，而当其为风力发电***时，风场也会存在一段时间的无风期，这两种情况下，考虑实际制氢需求，可以应用电网谷电制氢，具体的，该直流耦合制氢***在上一实施例的基础之上，其第二变换器103选用双向变换器，其变换装置105选用双向变换装置105，并且，其新能源***101的电能输出支路上还设置有可控开关(如图2至图3b中的K所示)；该可控开关可以是断路器，也可以是接触器等开关装置；此处不做具体限定，视其应用环境 而定，均在本申请的保护范围内。
当光伏发电***处于夜间，或者，风力发电***处于无风期时，通信主机或者***控制器通过通信单元106下发谷电制氢指令，切断新能源***101侧的可控开关，防止网侧能量倒灌新能源***101，损坏光伏组件等器件；并且，通信主机或者***控制器还通过通信单元106下发接收到的碱液电解槽的电压/电流指令给第一变换器102，第二变换器103工作、将网侧能量整流输出；第一变换器102根据接收到的电压/电流指令，进行相应输出，实现谷电制氢。因此，在新能源***101的输出电能小于等于启机阈值且当前时刻处于电网谷价阶段时，第二变换器103还用于通过变换装置105接收电网电能进行反向变换；第一变换器102还用于接收第二变换器103的电能，向制氢槽***104提供制氢电能。
也就是说，该可控开关能够在新能源***101的输出电能小于等于启机阈值且当前时刻处于电网谷价阶段时断开；而为了实现***的正常工作，该可控开关在其他时间是应当处于闭合状态的，这就要求***启机后，通信主机或者***控制器先通过通信单元106下发新能源放电指令，闭合新能源***101侧的可控开关，使新能源侧的能量可以输出至第一变换器102或者第二变换器103。
本实施例，不仅能够兼顾新能源功率的最大化利用，以及，碱液电解槽的最小电流/电压限制要求，而且，对于光伏发电***还能够实现夜间的谷电制氢，对于风力发电***还能够实现无风期谷电制氢，进而实现制氢的经济性。
本发明另一实施例还提供了一种直流耦合制氢***的控制方法，应用于如 上述任一实施例所述的直流耦合制氢***中的通信主机或者***控制器；如图4所示，该直流耦合制氢***的控制方法包括启机后执行的：
S101、控制直流耦合制氢***中的第一变换器处于待机状态、第二变换器通过变换装置进行并网输出。
S102、进行MPPT运算，并根据运算得到的运算信息判断直流耦合制氢***中新能源***的输出电能是否大于预设阈值。
具体的，如图4所示，步骤S102包括：
S201、进行MPPT运算，确定最大功率点的功率值。
S202、判断最大功率点的功率值是否大于预设阈值。
若制氢槽***中的制氢槽为碱液电解槽，则预设阈值为碱液电解槽的最小功率要求值、等于碱液电解槽的最小电流要求值与最小电压要求值的乘积，并且步骤S202，包括：
(1)根据最大功率点的功率值计算得到碱液电解槽的制氢电流理论值。
具体的，首先根据公式Uin＝U_limit+(Pmpp*Req) 1/2计算得到碱液电解槽的制氢电压理论值Uin；然后，再根据公式Iin＝Pmpp/Uin计算得到碱液电解槽的制氢电流理论值Iin。
其中，U_limit为碱液电解槽的最小电压要求值，Pmpp为最大功率点的功率值，Req为碱液电解槽的等效电阻。
(2)判断制氢电流理论值是否大于碱液电解槽的最小电流要求值。
该碱液电解槽的最小电流要求值，根据实际碱液电解槽而定即可，可以是其30％额定电流，也可以是其50％额定电流，还可以为其他比例的额定电流，此处不做限定，均在本申请的保护范围内。
若制氢电流理论值大于碱液电解槽的最小电流要求值，则判定最大功率点的功率值大于预设阈值。若制氢电流理论值小于等于碱液电解槽的最小电流要求值，则判定最大功率点的功率值小于等于预设阈值。
实际应用中，也可以采用滞环控制策略来实现上述比较判断的过程，比如，将该预设阈值分为：第一预设阈值和第二预设阈值，其该第一预设阈值大于等于第二预设阈值；此时，步骤S202包括：判断最大功率点的功率值是否上升到大于第一预设阈值，并且，未下降到小于第二预设阈值；若最大功率点的功率值上升到大于第一预设阈值，并且，未下降到小于第二预设阈值，则判定最大功率点的功率值大于预设阈值。对于碱液电解槽，则只要判断其制氢电流理论值是否满足碱液电解槽的最小电流要求即可，该最小电流要求可以是指制氢电流理论值上升到大于第一电流阈值之后，以及，下降到小于等于第二电流阈值之前；该第一电流阈值大于等于第二电流阈值，该第二电流阈值大于等于该最小电流要求值。
若最大功率点的功率值大于预设阈值，则判定新能源***的输出电能大于预设阈值，执行步骤S103；若最大功率点的功率值小于等于预设阈值，则判定新能源***的输出电能小于等于预设阈值，执行步骤S104。
S103、控制第二变换器处于待机状态、第一变换器向直流耦合制氢***中的制氢槽***提供制氢电能。
S104、维持第一变换器处于待机状态、第二变换器通过变换装置进行并网输出。
以上过程，能够实现并网/离网模式的切换，来兼顾新能源功率的最大化利用，以及，碱液电解槽的最小电流/电压限制要求，而且无需引入电池储能， 避免了因设置电池储能而导致的经济性差的问题。并且，该直流耦合制氢***结构简单、控制简单、运行可靠、方案容易实现。
优选的，当新能源***的电能输出支路上还设置有可控开关时，该直流耦合制氢***的控制方法，如图4所示，在步骤S101之前，还包括：
S100、控制可控开关闭合。
优选的，当第二变换器为双向变换器、变换装置为双向变换装置时，直流耦合制氢***的控制方法，还包括如图5所示的：
S401、判断新能源***的输出电能是否小于等于启机阈值以及当前时刻是否处于电网谷价阶段；
若新能源***的输出电能小于等于启机阈值且当前时刻处于电网谷价阶段，则执行步骤S402。
S402、控制可控开关断开、第二变换器通过变换装置接收电网电能进行反向变换、第一变换器接收第二变换器的电能并向制氢槽***提供制氢电能。
该直流耦合制氢***的结构及控制原理可以参见上述任一实施例所述，此处不再一一赘述。
本发明中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。对于实施例公开的装置而言，由于其与实施例公开的方法相对应，所以描述的比较简单，相关之处参见方法部分说明即可。
以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制。虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明。任何熟悉本领域的技术人员，在不脱离本发明技术方案范围情况下，都可利用上述 揭示的方法和技术内容对本发明技术方案做出许多可能的变动和修饰，或修改为等同变化的等效实施例。因此，凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所做的任何简单修改、等同变化及修饰，均仍属于本发明技术方案保护的范围内。

Claims (13)

  1. 一种直流耦合制氢***，其特征在于，包括：新能源***、第一变换器、制氢槽***、第二变换器、变换装置以及通信单元；其中：
    所述新能源***通过所述第一变换器连接所述制氢槽***，且所述新能源***依次通过所述第二变换器和所述变换装置连接电网；
    所述通信单元分别与所述第一变换器、所述第二变换器和所述制氢槽***通信连接；
    所述第一变换器用于在所述新能源***的输出电能大于预设阈值时，向所述制氢槽***提供制氢电能；
    所述第二变换器用于在所述新能源***的输出电能小于等于所述预设阈值时，通过所述变换装置进行并网输出。
  2. 根据权利要求1所述的直流耦合制氢***，其特征在于，所述制氢槽***的制氢槽为：碱液电解槽、PEM电解槽及固体氧化物电解槽中的任意一种；
    并且，所述制氢槽***中的制氢槽为碱液电解槽时，所述预设阈值为所述碱液电解槽的最小功率要求值。
  3. 根据权利要求1所述的直流耦合制氢***，其特征在于，所述第二变换器为双向变换器，所述变换装置为双向变换装置，所述新能源***的电能输出支路上还设置有可控开关；
    所述可控开关用于在所述新能源***的输出电能小于等于启机阈值且当前时刻处于电网谷价阶段时断开、在其他时间闭合；
    所述第二变换器还用于在所述新能源***的输出电能小于等于所述启机阈值且当前时刻处于电网谷价阶段时，通过所述变换装置接收电网电能进行反向变换；
    所述第一变换器还用于在所述新能源***的输出电能小于等于所述启机阈值且当前时刻处于电网谷价阶段时，接收所述第二变换器的电能，向所述制氢槽***提供制氢电能。
  4. 根据权利要求1-3任一所述的直流耦合制氢***，其特征在于，所述第一变换器中和所述第二变换器，采用主从控制；或者，
    所述直流耦合制氢***还包括：与所述通信单元相连的***控制器，用于实现所述直流耦合制氢***的集中控制。
  5. 根据权利要求1-3任一所述的直流耦合制氢***，其特征在于，所述通信单元独立设置，或者，集成于所述第一变换器和所述第二变换器中任意一个的内部。
  6. 根据权利要求1-3任一所述的直流耦合制氢***，其特征在于，所述新能源***为光伏发电***时，所述第一变换器为DC/DC变换器，所述第二变换器为DC/AC变换器或者串联连接的DC/DC变换器及DC/AC变换器；
    所述新能源***为风力发电***时，所述第一变换器为AC/DC变换器或者串联连接的AC/DC变换器和DC/DC变换器，所述第二变换器为AC/AC变换器。
  7. 一种直流耦合制氢***的控制方法，其特征在于，应用于如权利要求1-6任一所述的直流耦合制氢***中的通信主机或者***控制器，所述直流耦合制氢***的控制方法包括：
    启机后，控制所述直流耦合制氢***中的第一变换器处于待机状态、第二变换器通过变换装置进行并网输出；
    进行最大功率点跟踪MPPT运算，并根据运算得到的运算信息判断所述直流耦合制氢***中新能源***的输出电能是否大于预设阈值；
    若所述新能源***的输出电能大于所述预设阈值，则控制所述第二变换器处于待机状态、所述第一变换器向所述直流耦合制氢***中的制氢槽***提供制氢电能；
    若所述新能源***的输出电能小于等于所述预设阈值，则维持所述第一变换器处于待机状态、所述第二变换器通过变换装置进行并网输出。
  8. 根据权利要求7所述的直流耦合制氢***的控制方法，其特征在于，进行最大功率点跟踪MPPT运算，并根据运算得到的运算信息判断所述直流耦合制氢***中新能源***的输出电能是否大于预设阈值，包括：
    进行所述MPPT运算，确定最大功率点的功率值；
    判断所述最大功率点的功率值是否大于所述预设阈值；
    若所述最大功率点的功率值大于所述预设阈值，则判定所述新能源***的输出电能大于所述预设阈值。
  9. 根据权利要求8所述的直流耦合制氢***的控制方法，其特征在于，所述预设阈值包括：第一预设阈值和第二预设阈值，所述第一预设阈值大于等于所述第二预设阈值；
    判断所述最大功率点的功率值是否大于所述预设阈值，包括：
    判断所述最大功率点的功率值是否上升到大于所述第一预设阈值，并且，未下降到小于所述第二预设阈值；
    若所述最大功率点的功率值上升到大于所述第一预设阈值，并且，未下降到小于所述第二预设阈值，则判定所述最大功率点的功率值大于所述预设阈值。
  10. 根据权利要求8所述的直流耦合制氢***的控制方法，其特征在于，若所述制氢槽***中的制氢槽为碱液电解槽，则所述预设阈值为所述碱液电解槽的最小功率要求值、等于所述碱液电解槽的最小电流要求值与最小电压要求值的乘积，并且所述直流耦合制氢***的控制方法中，判断所述最大功率点的功率值是否大于所述预设阈值，包括：
    根据所述最大功率点的功率值计算得到所述碱液电解槽的制氢电流理论值；
    判断所述制氢电流理论值是否满足所述碱液电解槽的最小电流要求；
    若所述制氢电流理论值满足所述碱液电解槽的最小电流要求，则判定所述最大功率点的功率值大于所述预设阈值。
  11. 根据权利要求10所述的直流耦合制氢***的控制方法，其特征在于，根据所述最大功率点的功率值计算得到所述碱液电解槽的制氢电流理论值所采用的公式包括：
    Uin＝U_limit+(Pmpp*Req) 1/2和Iin＝Pmpp/Uin；
    其中，Uin为所述碱液电解槽的制氢电压理论值，Iin为所述碱液电解槽的制氢电流理论值，U_limit为所述碱液电解槽的最小电压要求值，Pmpp为所述最大功率点的功率值，Req为所述碱液电解槽的等效电阻。
  12. 根据权利要求7-11任一所述的直流耦合制氢***的控制方法，其特征在于，当所述新能源***的电能输出支路上还设置有可控开关时，所述直流耦合制氢***的控制方法，在控制所述直流耦合制氢***中的第一变换器处于 待机状态、第二变换器通过变换装置进行并网输出之前，还包括：
    控制所述可控开关闭合。
  13. 根据权利要求12所述的直流耦合制氢***的控制方法，其特征在于，当所述第二变换器为双向变换器、所述变换装置为双向变换装置时，所述直流耦合制氢***的控制方法，还包括：
    判断所述新能源***的输出电能是否小于等于启机阈值以及当前时刻是否处于电网谷价阶段；
    若所述新能源***的输出电能小于等于所述启机阈值且当前时刻处于电网谷价阶段，则控制所述可控开关断开、所述第二变换器通过所述变换装置接收电网电能进行反向变换、所述第一变换器接收所述第二变换器的电能并向所述制氢槽***提供制氢电能。
PCT/CN2020/093091 2019-10-28 2020-05-29 一种直流耦合制氢***及其控制方法 WO2021082423A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20883310.3A EP3965249A4 (en) 2019-10-28 2020-05-29 DC COUPLING SYSTEM FOR PRODUCTION OF HYDROGEN AND CONTROL METHOD THEREOF
AU2020377230A AU2020377230B2 (en) 2019-10-28 2020-05-29 Direct-current coupling hydrogen production system and control method therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911031338.2 2019-10-28
CN201911031338.2A CN112803472A (zh) 2019-10-28 2019-10-28 一种直流耦合制氢***及其控制方法

Publications (1)

Publication Number Publication Date
WO2021082423A1 true WO2021082423A1 (zh) 2021-05-06

Family

ID=75715585

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/093091 WO2021082423A1 (zh) 2019-10-28 2020-05-29 一种直流耦合制氢***及其控制方法

Country Status (4)

Country Link
EP (1) EP3965249A4 (zh)
CN (1) CN112803472A (zh)
AU (1) AU2020377230B2 (zh)
WO (1) WO2021082423A1 (zh)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113381624A (zh) * 2021-07-05 2021-09-10 阳光电源股份有限公司 一种制氢的电源***、制氢的装置和制氢的方法
CN113445062A (zh) * 2021-06-22 2021-09-28 新天绿色能源股份有限公司 电解水制氢装置、电解水制氢装置的控制方法、电子设备
CN113690938A (zh) * 2021-08-31 2021-11-23 河北建投新能源有限公司 一种基于功率模型预测的制氢***控制方法
CN113832475A (zh) * 2021-09-23 2021-12-24 中国大唐集团新能源科学技术研究院有限公司 可再生能源制氢***
CN114336605A (zh) * 2021-12-29 2022-04-12 西安交通大学 一种柔性电氢制储注一体站容量配置方法及***
CN114737203A (zh) * 2022-04-24 2022-07-12 国网浙江省电力有限公司金华供电公司 一种基于电解水制氢装置的快速调频响应控制***
CN114977246A (zh) * 2022-05-09 2022-08-30 中国华能集团清洁能源技术研究院有限公司 一种光伏电站制氢储能的方法及设备
CN115094433A (zh) * 2022-05-31 2022-09-23 同济大学 耦合电化学电源和超级电容器的混合制氢***及控制方法
CN115377992A (zh) * 2022-06-27 2022-11-22 国网浙江省电力有限公司丽水供电公司 适用于宽范围灵活制氢的功率变流器故障穿越控制方法
CN115473279A (zh) * 2022-10-21 2022-12-13 重庆大学 一种含电解水制氢负载的风光储离网微电网运行控制方法
WO2023050223A1 (zh) * 2021-09-29 2023-04-06 西门子（中国）有限公司 制氢***及其控制方法
WO2023087689A1 (zh) * 2021-11-19 2023-05-25 中国华能集团清洁能源技术研究院有限公司 一种间歇、波动电解制氢控制方法
CN116526416A (zh) * 2023-07-05 2023-08-01 福建福清核电有限公司 一种基于就地电气量特征的安全稳定控制***防误动方法
EP4243232A1 (en) * 2022-03-08 2023-09-13 Sungrow Hydrogen Sci.&Tech. Co., Ltd. Direct-current off-grid photovoltaic hydrogen production system and method for controlling the same
CN117889040A (zh) * 2024-03-14 2024-04-16 中国船舶集团风电发展有限公司 风电离网制氢的控制方法、装置、设备及存储介质

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117941199A (zh) * 2021-09-29 2024-04-26 西门子（中国）有限公司 制氢***
CN114032559B (zh) * 2021-11-08 2023-05-26 阳光电源股份有限公司 一种新能源离网制氢的***及方法
CN114381759B (zh) * 2022-02-11 2023-09-29 中国华能集团清洁能源技术研究院有限公司 一种光伏制氢***的控制***及控制方法
CN114990600B (zh) * 2022-04-29 2024-05-10 阳光氢能科技有限公司 一种新能源制氢***及其控制方法
DE102022205818A1 (de) * 2022-06-08 2023-12-14 Siemens Energy Global GmbH & Co. KG Anlagenverbund umfassend mindestens zwei Elektrolyseanlagen und eine Stromversorgungsquelle
DE102022206735A1 (de) * 2022-06-30 2024-01-04 Siemens Energy Global GmbH & Co. KG Anlagenverbund umfassend mindestens zwei Elektrolyseanlagen und eine Stromversorgungsquelle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202001202U (zh) * 2011-03-07 2011-10-05 国电联合动力技术有限公司 一种用于制氢的非并网式风力发电机组
DE102013112431A1 (de) * 2012-11-13 2014-06-05 Aeg Power Solutions B.V. Anordnung aus einem Kraftwerk und einer Vorrichtung zur Erzeugung von Gas mittels von dem Kraftwerk erzeugter elektrischer Energie
JP2017034843A (ja) * 2015-07-31 2017-02-09 株式会社東京機械製作所 水素製造システム、水素供給ステーション及び水素製造方法
CN108517533A (zh) * 2018-03-26 2018-09-11 全球能源互联网研究院有限公司 一种电解制氢控制方法及装置
CN109004665A (zh) * 2018-08-31 2018-12-14 河北科技大学 风电、光电离/并网制氢方法及***
CN109286205A (zh) * 2018-11-23 2019-01-29 河北工业大学 离并网自适应的风力发电机组控制装置及方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8996182B2 (en) * 2009-06-08 2015-03-31 Toyota Jidosha Kabushiki Kaisha Fuel cell system and power control method therefor
CN105463498B (zh) * 2016-01-25 2017-10-31 新疆工程学院 直流‑直流变换器与spe电解槽的耦合装置及其耦合方法
CN107017651A (zh) * 2017-05-22 2017-08-04 北京鑫海港亿科技有限公司 一种风电制氢储能的氢燃料复合电池及其发电方法
KR101926010B1 (ko) * 2018-02-28 2018-12-06 이화전기공업 주식회사 신재생에너지를 이용한 전력변환 시스템
CN109474010B (zh) * 2018-11-15 2022-07-26 中广核研究院有限公司 一种具有氢能循环利用的并网型微电网***及其控制方法
CN109755965B (zh) * 2019-03-20 2022-04-01 河北科技大学 风光发电和制氢储氢***的运行控制方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202001202U (zh) * 2011-03-07 2011-10-05 国电联合动力技术有限公司 一种用于制氢的非并网式风力发电机组
DE102013112431A1 (de) * 2012-11-13 2014-06-05 Aeg Power Solutions B.V. Anordnung aus einem Kraftwerk und einer Vorrichtung zur Erzeugung von Gas mittels von dem Kraftwerk erzeugter elektrischer Energie
JP2017034843A (ja) * 2015-07-31 2017-02-09 株式会社東京機械製作所 水素製造システム、水素供給ステーション及び水素製造方法
CN108517533A (zh) * 2018-03-26 2018-09-11 全球能源互联网研究院有限公司 一种电解制氢控制方法及装置
CN109004665A (zh) * 2018-08-31 2018-12-14 河北科技大学 风电、光电离/并网制氢方法及***
CN109286205A (zh) * 2018-11-23 2019-01-29 河北工业大学 离并网自适应的风力发电机组控制装置及方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3965249A4

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113445062A (zh) * 2021-06-22 2021-09-28 新天绿色能源股份有限公司 电解水制氢装置、电解水制氢装置的控制方法、电子设备
CN113381624B (zh) * 2021-07-05 2024-02-09 阳光电源股份有限公司 一种制氢的电源***、制氢的装置和制氢的方法
CN113381624A (zh) * 2021-07-05 2021-09-10 阳光电源股份有限公司 一种制氢的电源***、制氢的装置和制氢的方法
CN113690938A (zh) * 2021-08-31 2021-11-23 河北建投新能源有限公司 一种基于功率模型预测的制氢***控制方法
CN113832475A (zh) * 2021-09-23 2021-12-24 中国大唐集团新能源科学技术研究院有限公司 可再生能源制氢***
CN113832475B (zh) * 2021-09-23 2022-07-26 中国大唐集团新能源科学技术研究院有限公司 可再生能源制氢***
WO2023050223A1 (zh) * 2021-09-29 2023-04-06 西门子（中国）有限公司 制氢***及其控制方法
WO2023087689A1 (zh) * 2021-11-19 2023-05-25 中国华能集团清洁能源技术研究院有限公司 一种间歇、波动电解制氢控制方法
CN114336605A (zh) * 2021-12-29 2022-04-12 西安交通大学 一种柔性电氢制储注一体站容量配置方法及***
AU2023201005B2 (en) * 2022-03-08 2024-01-18 Sungrow Hydrogen Sci. & Tech. Co., Ltd Direct-current off-grid photovoltaic hydrogen production system and method for controlling the same
EP4243232A1 (en) * 2022-03-08 2023-09-13 Sungrow Hydrogen Sci.&Tech. Co., Ltd. Direct-current off-grid photovoltaic hydrogen production system and method for controlling the same
CN114737203B (zh) * 2022-04-24 2023-09-26 国网浙江省电力有限公司金华供电公司 一种基于电解水制氢装置的快速调频响应控制***
CN114737203A (zh) * 2022-04-24 2022-07-12 国网浙江省电力有限公司金华供电公司 一种基于电解水制氢装置的快速调频响应控制***
CN114977246A (zh) * 2022-05-09 2022-08-30 中国华能集团清洁能源技术研究院有限公司 一种光伏电站制氢储能的方法及设备
CN115094433A (zh) * 2022-05-31 2022-09-23 同济大学 耦合电化学电源和超级电容器的混合制氢***及控制方法
CN115377992A (zh) * 2022-06-27 2022-11-22 国网浙江省电力有限公司丽水供电公司 适用于宽范围灵活制氢的功率变流器故障穿越控制方法
CN115377992B (zh) * 2022-06-27 2024-04-09 国网浙江省电力有限公司丽水供电公司 适用于宽范围灵活制氢的功率变流器故障穿越控制方法
CN115473279A (zh) * 2022-10-21 2022-12-13 重庆大学 一种含电解水制氢负载的风光储离网微电网运行控制方法
CN115473279B (zh) * 2022-10-21 2024-03-29 重庆大学 一种含电解水制氢负载的风光储离网微电网运行控制方法
CN116526416A (zh) * 2023-07-05 2023-08-01 福建福清核电有限公司 一种基于就地电气量特征的安全稳定控制***防误动方法
CN117889040A (zh) * 2024-03-14 2024-04-16 中国船舶集团风电发展有限公司 风电离网制氢的控制方法、装置、设备及存储介质

Also Published As

Publication number Publication date
EP3965249A1 (en) 2022-03-09
AU2020377230A1 (en) 2022-01-06
AU2020377230B2 (en) 2023-07-13
EP3965249A4 (en) 2023-04-12
CN112803472A (zh) 2021-05-14

Similar Documents

Publication Publication Date Title
WO2021082423A1 (zh) 一种直流耦合制氢***及其控制方法
CN109004665B (zh) 风电、光电储能及离/并网制氢***
WO2021008235A1 (zh) 直流耦合离网制氢***及其控制柜供电装置和控制方法
JP4164050B2 (ja) 系統連系装置
CN110042413A (zh) 非并网风电电解水制氢***和方法
WO2021098172A1 (zh) 新能源复合制氢***及其控制方法
CN109962482B (zh) 基于市电功率补偿的风电非并网制氢***及其控制方法
CN203586455U (zh) 光伏空调***
CN103441566A (zh) 一种市电、光伏电池和储能电池协同供电***及方法
CN105186660A (zh) 离网型风电制氢转换***
CN114024327B (zh) 一种基于可再生能源发电多能互补的控制***及方法
CN114552659A (zh) 含电氢储能的多能量综合管理型能量路由器及控制方法
CN112290582B (zh) 新能源电站和直流耦合离网制氢***及其控制方法
CN112491032A (zh) 一种直流耦合离网制氢***及其控制方法
CN105978008A (zh) 一种具有风场黑启动功能的液流电池储能***及其工作方法
CN112653150A (zh) 离网发供电***
CN114204567A (zh) 一种基于交直流混合供电的光储一体化供电***及方法
CN113949054A (zh) 电网自治***及方法
Sulistiyowati et al. Fuel Cell Penetration Characteristics on Standalone Photovoltaic with Hybrid Energy Storage System
Zhao et al. Research of voltage control strategy for power management system in DC microgrid
CN112909988B (zh) 离网型双馈风电机组发电***、制氢***及其控制方法
CN112994056B (zh) 离网型发电***及其控制方法和应用***
CN110224389B (zh) 一种基于自律式浮动电压运行策略的直流微电网***
CN219576711U (zh) 一种风光制氢混合储能***
CN221263437U (zh) 一种户用光氢储能供电***

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: 20883310

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2020883310

Country of ref document: EP

Effective date: 20211129

ENP Entry into the national phase

Ref document number: 2020377230

Country of ref document: AU

Date of ref document: 20200529

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE