CN114243771A - Decision-making method and system for hydrogen production and consumption route of renewable energy source of local micro-grid - Google Patents
Decision-making method and system for hydrogen production and consumption route of renewable energy source of local micro-grid Download PDFInfo
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 201
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 201
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 189
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000004146 energy storage Methods 0.000 claims abstract description 58
- 238000010248 power generation Methods 0.000 claims abstract description 21
- 239000013589 supplement Substances 0.000 claims abstract description 7
- 238000003860 storage Methods 0.000 claims description 44
- 238000009826 distribution Methods 0.000 claims description 32
- 238000010438 heat treatment Methods 0.000 claims description 22
- 150000002431 hydrogen Chemical class 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005868 electrolysis reaction Methods 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
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- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- 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
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- 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
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- 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
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Abstract
The embodiment of the invention provides a decision-making method and system for a hydrogen production and consumption route of renewable energy sources of a local micro-grid, and relates to the technical field of local micro-grids. The method comprises the following steps: wind-solar power generation power P in local micro-grideREPower consumption P corresponding to the base of parkeBPower consumption difference PeSurplusUnder the condition of being less than or equal to zero, starting the electric energy storage system to discharge so as to supplement the electric load of the local micro-grid; difference P of power consumptioneSurplusUnder the condition of being larger than zero, estimating the stored power P of the electric energy storage systemeStor(ii) a Difference P of power consumptioneSurplusLess than or equal to the stored power PeStorIn case of (2), starting the charging of the electric energy storage systemThe charging power is the difference P of the power consumptioneSurplus. The method and the system can realize the efficient utilization and complete consumption of the local micro-grid energy, and improve the energy efficiency and the system economy of the system.
Description
Technical Field
The invention relates to the technical field of local micro-grids, in particular to a method and a system for making a decision on a hydrogen production and absorption route of renewable energy sources of local micro-grids.
Background
Due to the randomness and intermittence of wind, light and other renewable energy sources for power generation and the irregularity of load fluctuation, the unplanned power of the microgrid changes greatly, and therefore the reliable operation of the system is challenged greatly. The important energy load for monitoring the local energy network is to improve the consumption of the power grid to renewable energy through scientific and reasonable distribution of hydrogen production, energy storage and heating power, which is a technical problem to be solved at present.
Disclosure of Invention
The invention aims to provide a decision-making method and system for a hydrogen production and consumption route of renewable energy of a local microgrid, which can realize efficient utilization and complete consumption of energy of the local microgrid and improve the energy efficiency and the system economy of a system.
Embodiments of the invention may be implemented as follows:
in a first aspect, the invention provides a decision-making method for a hydrogen production and consumption route of renewable energy sources of local microgrids, which comprises the following steps:
wind-solar power generation power P in local micro-grideREPower consumption P corresponding to the base of parkeBPower consumption difference PeSurplusStarting the electric energy storage under the condition of being less than or equal to zeroDischarging the system to supplement the power load of the local micro-grid;
difference P of power consumptioneSurplusUnder the condition of being larger than zero, estimating the stored power P of the electric energy storage systemeStor；
Difference P of power consumptioneSurplusLess than or equal to the stored power PeStorUnder the condition of (1), starting the electric energy storage system to charge, wherein the charging power is the difference P of the power consumptioneSurplus。
In an alternative embodiment, the electrical storage power PeStorThe calculation formula of (a) is as follows:
PeStor＝λSOC*PeStorRate
where SOC is the state of charge of the electrical energy storage system, PeStorRateIs the rated charging power of the electric energy storage system, λ is the charging power coefficient of the electric energy storage system, and the value of λ is as follows:
in an alternative embodiment, the method further comprises:
difference P of power consumptioneSurplusGreater than the stored power PeStorIn the case of (1), the available power P for hydrogen production is estimatedHAveil；
Available power P for hydrogen productionHAveilLess than or equal to 0.3PHRateIn the case of (1), PHRateThe rated operation power of the electrolytic hydrogen production system is adopted, the electric hydrogen production system is started to heat, and the heating power is distributed as PeHot＝PHAveil。
In an alternative embodiment, the available power P for hydrogen productionHAveilThe calculation formula of (a) is as follows:
PHAveil＝PeSurplus-PeStor。
in an alternative embodiment, the method further comprises:
available power P for hydrogen productionHAveilGreater than 0.3PHRateAnd available power P for hydrogen productionHAveilGreater than rated operating powerPHRateUnder the condition of (1), starting the electric hydrogen production system to heat, and distributing the heating power to PeHot＝PHaveil-PHRate。
In an alternative embodiment, the method further comprises:
available power P for hydrogen productionHAveilGreater than 0.3PHRateAnd available power P for hydrogen productionHaveilLess than nominal operating power PHRateUnder the condition of (1), starting the electric hydrogen production system to produce hydrogen, and distributing the hydrogen production power into PHProd＝PHAveil。
In an alternative embodiment, the method further comprises:
calculating the current hydrogen storage power PHStor；
At the current hydrogen storage power PHStorGreater than the hydrogen production power PHProdIn the case of (2), hydrogen gas produced by electrolysis is allowed to enter the hydrogen storage system.
In an alternative embodiment, the method further comprises:
at the current hydrogen storage power PHstorLess than or equal to the hydrogen production power PHProdIn the case of (3), the hydrogen pipeline valve is opened to allow excess hydrogen to enter the pipeline.
In an alternative embodiment, the current hydrogen storage power PHStorThe calculation formula of (a) is as follows:
PHStor＝(pmax-pnow)*VHStor*eH/t
in the formula, PnowIs the current hydrogen pressure, P, of the hydrogen storage systemmaxIs the maximum pressure, V, of the hydrogen storage systemHStorIs the water volume of the hydrogen storage system, t is the power distribution strategy single cycle duration, eHIs a hydrogen volumetric power fast calculation coefficient.
In a second aspect, the invention provides a decision-making system for a hydrogen production and consumption route of renewable energy sources in a local microgrid, which comprises an electro-hydrogen power decision-making and distribution platform, wherein the electro-hydrogen power decision-making and distribution platform is used for executing the following procedures:
wind-solar power generation power P in local micro-grideREPower consumption P corresponding to the base of parkeBElectric powerRate difference PeSurplusUnder the condition of being less than or equal to zero, starting the electric energy storage system to discharge so as to supplement the electric load of the local micro-grid;
difference P of power consumptioneSurplusUnder the condition of being larger than zero, estimating the stored power P of the electric energy storage systemeStor；
Difference P of power consumptioneSurplusLess than or equal to the stored power PeStorUnder the condition of (1), starting the electric energy storage system to charge, wherein the charging power is the difference P of the power consumptioneSurplus。
The method and the system for deciding the hydrogen production and consumption route of the renewable energy source of the local microgrid have the beneficial effects that:
at PeRE-PeB＝PeSurplusUnder the condition that the power consumption is less than or equal to 0, starting the electric energy storage system to discharge so as to supplement the electric load of the local micro-grid, and under the condition that the power consumption is less than or equal to PeSurplus≤PeStorUnder the condition of the energy storage system, the electric energy storage system is started to charge, so that the complete consumption of the energy of the local micro-grid can be realized, and the energy efficiency of the system is improved; the energy of the local micro-grid can be efficiently utilized, and the economical efficiency of the system is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a flowchart of a local microgrid renewable energy hydrogen production consumption route decision method provided in an embodiment of the present invention;
fig. 2 is a schematic view of an application scenario of a decision-making system for a hydrogen production and consumption route of a local microgrid renewable energy source provided by an embodiment of the present invention;
fig. 3 is various power generation and utilization curves of the campus microgrid provided by the embodiment of the invention;
fig. 4 is a power distribution strategy curve of the campus microgrid provided in the embodiment of the present invention.
Icon: 10-a local microgrid renewable energy hydrogen production consumption route decision system; 11-an electro-hydrogen power decision distribution platform; 20-a power input device; 30-local area network power energy router; 40-an electric heating system; 50-an electrical energy storage system; 60-microgrid electric equipment; 70-electrical hydrogen production system.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1, this embodiment provides a decision-making method (hereinafter referred to as "method") for a hydrogen generation and consumption route of a local microgrid renewable energy source, which performs power detection, estimation and distribution according to a certain period t, where the certain period may be 10 seconds, 30 seconds, 1 minute, 5 minutes, 15 minutes, 1 hour or other suitable time periods according to the effectiveness of a strategy. Here, the power policy allocation description is performed in a unit of one minute as a cycle, and the method includes the following steps:
s1: detection ofWind power generation power P in local micro-grideREAnd park basic electric power PeB。
S2: calculating wind-solar power generation power PeREPower consumption P corresponding to the base of parkeBPower consumption difference PeSurplus。
S3: determining whether to use the electric power difference PeSurplusGreater than zero.
Wind-solar power generation power P in local micro-grideREPower consumption P corresponding to the base of parkeBPower consumption difference PeSurplusIf it is less than or equal to zero, S4 is executed: and starting the electric energy storage system to discharge so as to supplement the electric load of the local micro-grid, finishing the single-cycle power distribution, and restarting.
Difference P of power consumptioneSurplusIf it is greater than zero, S5 is executed: detecting the state of charge (SOC) of the electric energy storage system and estimating the stored electric power (P) of the electric energy storage systemeStor。
Stored electric power PeStorThe calculation formula of (a) is as follows:
PeStor＝λSOC*PeStorRate
where SOC is the state of charge of the electrical energy storage system, PeStorRateThe rated charging power of the electric energy storage system belongs to the nameplate parameter of the electric energy storage system, lambda is the charging power coefficient of the electric energy storage system, and the value of lambda is as follows:
s6: determining whether to use the electric power difference PeSurplusGreater than the stored power PeStor。
Difference P of power consumptioneSurplusLess than or equal to the stored power PeStorIn the case of (3), S7 is executed: starting the charging of the electric energy storage system, wherein the charging power is the difference P of the power consumptioneSurplusAnd the power distribution of the single period is finished and restarted.
Difference P of power consumptioneSurplusGreater than the stored power PeStorIn the case of (1), execution is carried outS8: estimating available power P for hydrogen productionHaveil. Available power P for hydrogen productionHAveilThe calculation formula of (a) is as follows:
PHAveil＝PeSurplus-PeStor。
s9: judging whether the available power P for hydrogen productionHAveilGreater than 0.3PHRate. Wherein, PHRateIs the rated operation power of the electrolytic hydrogen production system.
Available power P for hydrogen productionHAveilLess than or equal to 0.3PHRateIn the case of (1), PHRateIs the rated operation power of the electrolytic hydrogen production system, and executes S10: starting the electric hydrogen production system to heat, and distributing the heating power to PeHot＝PHAveilAnd the power distribution of the single period is finished and restarted.
Available power P for hydrogen productionHAveilGreater than 0.3PHRateIn the case of (3), S11 is executed: judging whether the available power P for hydrogen productionHAveilGreater than nominal operating power PHRate。
Available power P for hydrogen productionHAveilGreater than 0.3PHRateAnd available power P for hydrogen productionHaveilLess than nominal operating power PHRateIn the case of (3), S12 is executed: starting the electric hydrogen production system to produce hydrogen, wherein the hydrogen production power is distributed as PHProd＝PHAveilAnd the power distribution of the single period is finished and restarted.
Available power P for hydrogen productionHAveilGreater than 0.3PHRateAnd available power P for hydrogen productionHAveilGreater than nominal operating power PHRateIn the case of (3), S13 is executed: starting the electric hydrogen production system to heat, and distributing the heating power to PeHot＝PHaveil-PHrate(ii) a And S14: starting the electric hydrogen production system to produce hydrogen, wherein the hydrogen production power is distributed as PHProd＝PHRate。
Available power P for hydrogen productionHAveilGreater than 0.3PHRateAnd available power P for hydrogen productionHaveilLess than nominal operating power PHRateIn the case of (3), S15 is executed: starting the electric hydrogen production system to produce hydrogen, wherein the hydrogen production power is distributed as PHProd＝PHAveil。
S16: detecting hydrogen storage pressure P of hydrogen storage systemnowCalculating the current hydrogen storage power PHStor. Wherein the current hydrogen storage power PHStorThe calculation formula of (a) is as follows:
PHStor＝(pmax-pnow)*VHStor*eH/t
in the formula, PHStorIs the current hydrogen storage power P of the hydrogen storage systemHStorIn KW, PnowIs the current hydrogen pressure of the hydrogen storage system in Pa, PmaxIs the maximum pressure of the hydrogen storage system in Pa, VHStorIs the water volume of the hydrogen storage system, in m3T is the power allocation strategy single period duration, and the unit is h, eHThe volume power of the hydrogen is quickly calculated, and the value is 6 kw/(Pam)3)。
S17: judging whether the current hydrogen storage power PHStorGreater than the hydrogen production power PHProd。
At the current hydrogen storage power PHStorGreater than the hydrogen production power PHProdIn the case of (3), S18 is executed: hydrogen produced by electrolysis can enter the hydrogen storage system, and the single-cycle power distribution is finished and restarted.
At the current hydrogen storage power PHstorLess than or equal to the hydrogen production power PHProdIn the case of (3), S19 is executed: and opening a hydrogen pipeline valve to enable redundant hydrogen to enter the pipeline, finishing the single-cycle power distribution, and restarting.
Referring to fig. 2, the present embodiment provides a decision-making system 10 (hereinafter referred to as "system") for hydrogen production and consumption routes of renewable energy sources of local micro-grids, which can effectively operate the above decision-making method for hydrogen production and consumption routes of renewable energy sources of local micro-grids.
In order to effectively operate the strategy, the system comprises an electric hydrogen power decision distribution platform 11, and the electric hydrogen power decision distribution platform 11 is connected with a local area network power energy router 30 in a communication mode. The lan power energy router 30 is a device having a power multi-directional flow capability and an active power control capability, and can monitor, distribute and actively control power of electric power.
The power input end of the local area network power energy router 30 is connected to the power input device 20, which may be a power device such as a power grid distribution network, a wind power supply, a photovoltaic power supply, etc. The power output end of the local area network power energy router 30 may be connected to the electric heating system 40, the electric energy storage system 50, the microgrid electric equipment 60, the electric hydrogen production system 70, and the like.
The electric heating system 40 includes, but is not limited to, an electric heater and an air source heat pump. Microgrid consumers include, but are not limited to, lighting devices. The hydrogen produced by the electrical hydrogen production system 70 can be connected with a hydrogen storage system and a hydrogen energy pipeline, the hydrogen storage system can be a hydrogen storage bottle, a hydrogen storage tank or a hydrogen storage box, and the hydrogen storage pressure is 0MPa-20 MPa. The hydrogen energy pipeline is a low-pressure pipeline, can be a pure hydrogen pipeline, and can also be a hydrogen loading pipeline, such as a natural gas hydrogen loading pipeline.
The electric hydrogen power decision distribution platform 11 can monitor the input power of the local area network power energy router 30, and can monitor the state of charge (SOC) of the electric energy storage system and the current hydrogen pressure (P) of the hydrogen storage systemnow。
The electric hydrogen power decision distribution platform 11 has a power flow fast estimation function, the estimation time period can be 10 seconds, 30 seconds, 1 minute, 5 minutes, 15 minutes, 1 hour or other suitable time periods, and the heating power, the park electricity power, the electricity energy storage power and the hydrogen production system power can be fast calculated according to the local micro-grid renewable energy hydrogen production absorption route decision method.
The electric-hydrogen power decision distribution platform 11 may actively distribute electric power at the electric power output end of the local area network electric power energy router 30, including heating power, park electric power, electric energy storage power, and hydrogen production system power.
Referring to fig. 3 and 4, a case of the local microgrid renewable energy hydrogen production and consumption route decision method and system is provided, in this case, photovoltaic power generation is adopted as renewable energy for power generation in a park, the power generation limit is 50MW, the park is equipped with a 10MW electrical energy storage system and a 15MW electrical hydrogen production system, the electrical power consumption of the park has different loads, the electrical energy storage system can be charged and discharged at different periods, and the electrical hydrogen production can be performed by electrolysisHydrogen generated by the hydrogen system can enter a hydrogen storage tank, the rated pressure of the hydrogen storage tank is 20Mpa, and the water volume is 10m3Or can enter a hydrogen pipeline of a park; the electric boiler system with 20MW is equipped, and the power generation curve of each system is shown in figure 3. This case is illustrated with a power generation curve for a certain day for a renewable energy distribution and consumption strategy, as shown in fig. 4. Here, the power policy allocation description is performed in units of one minute as a cycle.
In the 0-a period, the photovoltaic power generation is not carried out, the electric power consumption of the park is about 3MW, and the electric-hydrogen power decision distribution platform detects the electric power consumption difference PeSurplusLess than 0; therefore, the electric energy storage system of the park is started to discharge, and the electric load of the park is supplemented; closing the electrolytic hydrogen production system; and closing the heating system of the electric boiler.
In the first half of the period a-b, the photovoltaic power generation power is lower and gradually rises, the power utilization power of the garden is changed, and the electric-hydrogen power decision distribution platform detects the difference P of the power utilization powereSurplusWhen the SOC of the electric energy storage system is more than 0, the SOC of the electric energy storage system is about 18 percent, the charging capability of the electric energy storage system can be rapidly calculated, and the charging power is 10 MW; the available power for hydrogen production is P Haveil0; thus starting the park electric energy storage system to charge; closing the electrolytic hydrogen production system; and closing the heating system of the electric boiler.
In the latter half of the period a-b, the photovoltaic power generation power gradually rises, and the available hydrogen production power P is calculated by the electric hydrogen power decision distribution platformHAveilNot higher than 4.5MW, at 0 < PHAveil≤0.3*PHRateAt this time, the SOC of the electrical energy storage system is about 33%; therefore, the electric energy storage system of the park is started to charge, the charging power is 10MW, the heating system of the electric boiler is started, and the heating power follows PHAveil(ii) a And (4) closing the electrolytic hydrogen production system.
In the b-c period, the photovoltaic power generation power rises, and the hydrogen power decision distribution platform calculates the available hydrogen production power PHAveilAbove 4.5MW at 0.3 × PHRate＜PHAveil＜PHRateDetecting that the SOC of the electric energy storage system is about 55 percent and the pressure of the hydrogen storage tank is 8 MPa; thus starting the charging of the electric energy storage system in the park with charging power of 10MW and starting the electrolysisHydrogen production system, hydrogen production power follows PHAveil(ii) a And closing the heating system of the electric boiler.
In the c-d period, the photovoltaic power generation power rises, and the hydrogen power decision distribution platform calculates the available hydrogen production power PHAveilAbove 15MW at PHAveil≥PHRateDetecting that the SOC of the electric energy storage system is about 85 percent and the pressure of the hydrogen storage tank is 11 MPa; therefore, the electric energy storage system of the park is started to charge, the charging power is 10MW, and the electrolytic hydrogen production system is started, and the hydrogen production power is 15 MW; starting the heating system of the electric boiler, and following the heating power (P)Haveil-15)。
In the d-e period, the photovoltaic power generation power rises, and the available hydrogen production power P is calculated by the electric-hydrogen power decision distribution platformHAveilAbove 15MW at PHAveil≥PHRateDetecting that the SOC of the electric energy storage system is about 100 percent and the pressure of the hydrogen storage tank is 15 MPa; thus shutting down charging of the electrical energy storage system of the park; starting an electrolytic hydrogen production system, wherein the hydrogen production power is 15 MW; starting the heating system of the electric boiler, and following the heating power (P)Haveil-15)。
In the e-f period, the available power P for hydrogen production is calculated by the electric hydrogen power decision distribution platformHaveilAbove 4.5MW, below 15MW at 0.3 × PHRate＜PHAveil＜PHRateDetecting that the SOC of the electric energy storage system is about 100 percent and the pressure of the hydrogen storage tank is 20 MPa; thus shutting down charging of the electrical energy storage system of the park; starting an electrolytic hydrogen production system, wherein the hydrogen production power is PHAveilThe hydrogen product enters a hydrogen pipeline; and closing the heating system of the electric boiler.
In the f-g period, the available power P for hydrogen production is calculated by the electric hydrogen power decision distribution platformHAveilLess than 4.5MW at PHAveil＜0.3*PHRateDetecting that the SOC of the electric energy storage system is about 100 percent and the pressure of the hydrogen storage tank is 20 MPa; thus shutting down charging of the park electrical energy storage system; closing the electrolytic hydrogen production system; starting the heating system of the electric boiler, wherein the heating power is PHaveil。
In the g-24 period, the available power P for hydrogen production is calculated by the electric hydrogen power decision distribution platformHaveilIs 0, to the power consumption difference PeSurplusLess than 0; therefore, the electric energy storage system of the park is started to discharge, and the electric load of the park is supplemented; closing the electrolytic hydrogen production system; and closing the heating system of the electric boiler.
The method and the system for deciding the hydrogen production and consumption route of the renewable energy source of the local microgrid have the beneficial effects that:
1. the complete energy consumption of the local micro-grid can be realized, and the energy efficiency of the system is improved;
2. the energy of the local micro-grid can be efficiently utilized, and the economical efficiency of the system is improved;
3. the electricity, hydrogen and heat combined output of the local micro-grid can be realized, and the energy diversity of the system is improved;
4. the coupling of a power grid, a hydrogen grid and a heat supply network can be realized, and the reliability of the system is improved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A decision-making method for a hydrogen production and consumption route of a local microgrid renewable energy source is characterized by comprising the following steps:
wind-solar power generation power P in local micro-grideREPower consumption P corresponding to the base of parkeBPower consumption difference PeSurplusUnder the condition of being less than or equal to zero, starting the electric energy storage system to discharge so as to supplement the electric load of the local micro-grid;
at the electric power consumption difference PeSurplusEstimating the stored power P of the electric energy storage system under the condition that the stored power P is larger than zeroeStor；
At the electric power consumption difference PeSurplusLess than or equal to the stored electric power PeStorIn case of (2), starting charging of the electric energy storage system, the charging power being the difference P of the electric power consumptioneSurplus。
2. The local microgrid renewable energy hydrogen production consumption route decision method as claimed in claim 1, characterized in that the stored electric power PeStorThe calculation formula of (a) is as follows:
PeStor＝λSOC*PeStorRate
where SOC is the state of charge of the electrical energy storage system, PeStorRateIs the rated charging power of the electric energy storage system, λ is the charging power coefficient of the electric energy storage system, and the value of λ is as follows:
3. the local microgrid renewable energy hydrogen production consumption route decision method of claim 1, further comprising:
at the electric power consumption difference PeSurplusGreater than the stored power PeStorIn the case of (1), the available power P for hydrogen production is estimatedHAveil；
At the available power P for hydrogen productionHAveilLess than or equal to 0.3PHRateIn the case of (1), PHRateThe rated operation power of the electrolytic hydrogen production system is adopted, the electric hydrogen production system is started to heat, and the heating power is distributed as PeHot＝PHAveil。
4. The local microgrid renewable energy hydrogen production consumption route decision method as claimed in claim 3, characterized in that the available hydrogen production power PHAveilThe calculation formula of (a) is as follows:
PHAveil＝PeSurplus-PeStor。
5. the local microgrid renewable energy hydrogen production consumption route decision method of claim 3, further comprising:
at the available power P for hydrogen productionHAveilGreater than 0.3PHRateAnd the available power P for hydrogen productionHAveilGreater than the rated operating power PHRateUnder the condition of (1), starting the electric hydrogen production system to heat, and distributing the heating power to PeHot＝PHaveil-PHRate。
6. The local microgrid renewable energy hydrogen production consumption route decision method of claim 3, further comprising:
at the available power P for hydrogen productionHAveilGreater than 0.3PHRateAnd the available power P for hydrogen productionHaveilLess than the rated operating power PHRateUnder the condition of (1), starting the electric hydrogen production system to produce hydrogen, and distributing the hydrogen production power into PHProd＝PHAveil。
7. The local microgrid renewable energy hydrogen production consumption route decision method of claim 6, further comprising:
calculating the current hydrogen storage power PHStor；
At the current hydrogen storage power PHStorGreater than the hydrogen production power PHProdIn the case of (2), hydrogen gas produced by electrolysis is allowed to enter the hydrogen storage system.
8. The local microgrid renewable energy hydrogen production consumption route decision method of claim 7, further comprising:
at the current hydrogen storage power PHstorLess than or equal to the hydrogen production power PHProdIn the case of (3), the hydrogen pipeline valve is opened to allow excess hydrogen to enter the pipeline.
9. The local microgrid renewable energy hydrogen production consumption route decision method of claim 7, characterized in that the current hydrogen storage power PHStorThe calculation formula of (a) is as follows:
PHStor＝(pmax-pnow)*VHStor*eH/t
in the formula, PnowIs the current hydrogen pressure, P, of the hydrogen storage systemmaxIs the maximum pressure, V, of the hydrogen storage systemHStorIs the water volume of the hydrogen storage system, t is the power distribution strategy single cycle duration, eHIs a hydrogen volumetric power fast calculation coefficient.
10. The decision-making system for the hydrogen production and consumption route of the renewable energy source of the local microgrid is characterized by comprising an electro-hydrogen power decision-making and distribution platform, wherein the electro-hydrogen power decision-making and distribution platform is used for executing the following procedures:
wind-solar power generation power P in local micro-grideREPower consumption P corresponding to the base of parkeBPower consumption difference PeSurplusUnder the condition of being less than or equal to zero, starting the electric energy storage system to discharge so as to supplement the electric load of the local micro-grid;
at the electric power consumption difference PeSurplusEstimating the stored power P of the electric energy storage system under the condition that the stored power P is larger than zeroeStor；
At the electric power consumption difference PeSurplusLess than or equal to the stored electric power PeStorIn case of (2), starting charging of the electric energy storage system, the charging power being the difference P of the electric power consumptioneSurplus。
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