Method and system for quantitative evaluation of carbon emission reduction benefit of hydrogen energy storage power station

Abstract

The invention discloses a method and system for quantitative evaluation of carbon emission reduction benefits of a hydrogen energy storage power station, and belongs to the technical field of novel power system planning operation. The method comprises the following steps: for the hydrogen energy storage power station, determining a project boundary of the hydrogen energy storage power station, and identifying a datum line scene in the project boundary; for the identified datum line scene, calculating carbon emission of a datum line in the datum line scene; and calculating the carbon emission of the hydrogen energy storage power station, and quantifying the carbon emission reduction benefit of the hydrogen energy storage power station based on the carbon emission of the hydrogen energy storage power station and the carbon emission of the reference line. According to the method, the annual carbon emission reduction of the hydrogen energy storage power station can be calculated according to the datum line scene and the project carbon emission, the calculation process is simple, the electrical quantity needing to be measured is small, and the carbon emission reduction benefit of the hydrogen energy storage power station can be effectively quantified.

Description

Technical Field

[0001] The present invention relates to the technical field of new power system planning and operation, and more specifically, to a method and system for quantitatively evaluating the carbon emission reduction benefits of a hydrogen energy storage power station. Background Art

[0002] As the global demand for renewable energy continues to grow, the world's energy landscape is undergoing profound changes. Hydrogen energy, as an important strategic direction for solving the energy resource crisis and environmental crisis, will be an important part of my country's construction of a "clean, low-carbon, safe and efficient" energy system. The "Medium- and Long-Term Plan for the Development of the Hydrogen Energy Industry (2021-2035)" points out that hydrogen energy is an important part of the future national energy system and an important carrier for energy users to achieve green and low-carbon transformation. It will actively carry out demonstration applications of hydrogen in the field of energy storage and rationally plan diversified applications in the field of power generation.

[0003] As a clean and efficient form of energy, hydrogen energy has the advantages of cross-season, cross-regional and large-scale storage. Considering the development needs of future new power systems, hydrogen energy storage can be widely used in all aspects of power system sources, networks, and loads. It has rich application scenarios. When participating in the dispatching and operation of power systems, it can achieve peak shaving and valley filling, promote the consumption of new energy (wind power, photovoltaics), and help reduce carbon emissions in power systems. With the restart of the national voluntary greenhouse gas emission reduction trading market in January 2024, hydrogen energy storage may have the opportunity to participate in the carbon market as a market player in the future, and realize profits through voluntary emission reduction transactions. However, it is still difficult to quantify the carbon assets and carbon emission reduction scale of hydrogen energy storage, and it is impossible to accurately and objectively evaluate the contribution of hydrogen energy storage to carbon emission reduction in the power industry. Summary of the invention

[0004] In view of the above problems, the present invention proposes a method for quantitatively evaluating the carbon emission reduction benefits of a hydrogen energy storage power station, comprising:

[0005] For a hydrogen energy storage power station, determining a project boundary of the hydrogen energy storage power station and identifying a baseline scenario within the project boundary;

[0006] For the identified baseline scenario, calculate the baseline carbon emissions in the baseline scenario;

[0007] The carbon emissions of the hydrogen energy storage power station are calculated, and based on the carbon emissions of the hydrogen energy storage power station and the carbon emissions of a baseline, the carbon emission reduction benefits of the hydrogen energy storage power station are quantified.

[0008] Optionally, the project boundaries of the hydrogen energy storage power station include:

[0009] All facilities of wind power or photovoltaic power plants, hydrogen energy storage power stations and power grids connected to energy storage power stations.

[0010] Optional, baseline scenario, including one or a combination of the following two scenarios:

[0011] (1) For hydrogen energy storage projects that generate electricity and are connected to the grid, the baseline scenario is: the grid-connected electricity generated by the project activities is replaced by existing and newly built grid-connected power plants in the power system;

[0012] (2) For hydrogen energy storage projects with direct power generation and load connection, the baseline scenario is: the user's original electricity usage scenario;

[0013] The user's original electricity usage scenario includes: self-provided power plant, grid power or mixed sources.

[0014] Optionally, calculate the baseline carbon emissions for the baseline scenario, including:

[0015] For hydrogen energy storage projects, the baseline carbon emissions include: CO2 emissions from fossil fuel power plants replaced by project activities, calculated as follows:

[0016] BE y =BE grid,y +BE capt,y (3)

[0017] Among them, BE y is the baseline emissions of the project in year y, in tons of carbon dioxide tCO2, BE grid,y is the baseline emissions of grid electricity replaced by the project activity in year y, in tons of carbon dioxide tCO2, BE capt,y is the baseline emissions of captive power plant electricity replaced by the project activity in year y, in tons of carbon dioxide, tCO2;

[0018] Among them, BE grid,y The calculation formula is as follows:

[0019] BE grid,y =EG grid,PJ,y ×EF grid,CM,y (2)

[0020] Among them, EG grid,PJ,y The amount of hydrogen energy storage project on-grid electricity in year y is expressed in megawatt hours (MWh), EF grid,CM,y is the combined marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt hour tCO2 / MWh;

[0021] Among them, EF grid,CM,y The calculation formula is as follows:

[0022] EF grid,CM,y =EF grid,OM,y ×ω OM +EFgrid,BM,y ×ω BM (3)

[0023] Among them, EF grid,OM,y is the marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt hour tCO2 / MWh, EF grid,BM,y is the capacity marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt hour tCO2 / MWh, ω OM is the weight of the marginal emission factor of electricity, ω BM is the weight of the capacity marginal emission factor;

[0024] Among them, BE capt,y The calculation formula is as follows:

[0025] BE capt,y =EG capt,PJ,y ×EF BL,FF (4)

[0026] Among them, BE capt,y is the baseline emissions of captive power plant electricity replaced by hydrogen energy storage project activities in year y, in tons of carbon dioxide tCO2, EG capt,PJ,y The electricity generated by the self-contained power plant replaced by the hydrogen energy storage project in year y, in megawatt hours (MWh), EF BL,FF CO2 emission factor for captive power plants using fossil fuels, expressed in tonnes of CO2 per megawatt-hour (tCO2 / MWh).

[0027] Optionally, the carbon emissions of the hydrogen energy storage power station are calculated using the following formula:

[0028] PE y =PE EC,y +PE FC,y +PE H2-l,y (5)

[0029] Among them, PE y is the project emissions in year y, in tons of carbon dioxide tCO2, PE EC,y =Emissions from electricity consumption from sources other than self-provided wind / photovoltaic power plants due to project activities in year y, in tons of carbon dioxide tCO2, PE FC,y = is the emission of fossil fuels consumed by project activities in year y, in tons of carbon dioxide tCO2, PE H2-l,y The project emissions caused by the physical leakage of hydrogen in the project activities in year y, in tons of carbon dioxide tCO2;

[0030] Among them, PE EC,y The calculation formula is as follows:

[0031] PE EC,y =EC non-re,y ×EF non-re (6)

[0032] Among them, EC non-re,y The amount of electricity consumed from sources other than self-generated wind power or photovoltaic power plants used for the project activity in year y, in megawatt hours (MWh), EF non-re The emission factor for electricity from non-captive wind / photovoltaic power plants, expressed in tons of carbon dioxide per megawatt-hour (tCO2 / MWh);

[0033] Among them, PE FC,y The calculation formula is as follows:

[0034] PE FC,y =∑ i FC i,PJ,y ×NCV i ×EF CO2,i (7)

[0035] Among them, FC i,PJ,y The consumption of fossil fuel i in the project activity in year y, in tons or 10,000 standard cubic meters (t) or 10,000 Nm 3 , NCV i is the net calorific value of fossil fuel i, expressed in GJ / t or GJ / 10,000 Nm 3 , E.F. CO2,i is the CO2 emission factor of fossil fuel i, in tons of carbon dioxide per gigajoules (tCO2 / GJ), where i is the type of fossil fuel;

[0036] Among them, PE H2-l,y The calculation formula is as follows:

[0037] PE H2-l,y =M H2,PJ,y ×PL H2 ×GWP H2 (8)

[0038] Among them, PE H2-l,y In year y, the project emissions caused by physical leakage of hydrogen in project activities, in tons of carbon dioxide tCO2, M H2,PJ,y The mass of hydrogen produced by the hydrogen production unit in the project activity in year y, in tons, PL H2 is the proportion of physical leakage of hydrogen in the value chain, expressed in %, GWP H2 The greenhouse gas warming potential of hydrogen is expressed in tonnes of carbon dioxide per tonne of hydrogen, tCO2 / tH2.

[0039] Optionally, a calculation formula for quantifying the carbon emission reduction benefit of the hydrogen energy storage power station is as follows:

[0040] ER y =BE y -PE y (9).

[0041] On the other hand, the present invention also proposes a system for quantitatively evaluating the carbon emission reduction benefits of a hydrogen energy storage power station, comprising:

[0042] A first calculation unit is used to determine a project boundary of the hydrogen energy storage power station and identify a baseline scenario within the project boundary;

[0043] A second calculation unit is used to calculate the baseline carbon emissions in the baseline scenario for the identified baseline scenario;

[0044] The third calculation unit is used to calculate the carbon emissions of the hydrogen energy storage power station, and quantify the carbon emission reduction benefits of the hydrogen energy storage power station based on the carbon emissions of the hydrogen energy storage power station and the carbon emissions of a baseline.

[0045] Optionally, the project boundaries of the hydrogen energy storage power station include:

[0046] All facilities of wind power or photovoltaic power plants, hydrogen energy storage power stations and power grids connected to energy storage power stations.

[0047] Optional, baseline scenario, including one or a combination of the following two scenarios:

[0048] (1) For hydrogen energy storage projects that generate electricity and are connected to the grid, the baseline scenario is: the grid-connected electricity generated by the project activities is replaced by existing and newly built grid-connected power plants in the power system;

[0049] (2) For hydrogen energy storage projects with direct power generation and load connection, the baseline scenario is: the user's original electricity usage scenario;

[0050] The user's original electricity usage scenario includes: self-provided power plant, grid power or mixed sources.

[0051] Optionally, calculate the baseline carbon emissions for the baseline scenario, including:

[0052] For hydrogen energy storage projects, the baseline carbon emissions include: CO2 emissions from fossil fuel power plants replaced by project activities, calculated as follows:

[0053] BE y =BE grid,y +BE capt,y (4)

[0054] Among them, BE y is the baseline emissions of the project in year y, in tons of carbon dioxide tCO2, BEgrid,y is the baseline emissions of grid electricity replaced by the project activity in year y, in tons of carbon dioxide tCO2, BE capt,y is the baseline emissions of captive power plant electricity replaced by the project activity in year y, in tons of carbon dioxide, tCO2;

[0055] Among them, BE grid,y The calculation formula is as follows:

[0056] BE grid,y =EG grid,PJ,y ×EF grid,CM,y (2)

[0057] Among them, EF grid,PJ,y The amount of hydrogen energy storage project on-grid electricity in year y is expressed in megawatt hours (MWh), EF grid,CM,y is the combined marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt hour tCO2 / MWh;

[0058] Among them, EF grid,CM,y The calculation formula is as follows:

[0059] EF grid,CM,y =EF grid,OM,y ×ω OM +EF grid,BM,y ×ω BM (3)

[0060] Among them, EF grid,OM,y is the marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt hour tCO2 / MWh, EF grid,BM,y is the capacity marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt hour tCO2 / MWh, ω OM is the weight of the marginal emission factor of electricity, ω BM is the weight of the capacity marginal emission factor;

[0061] Among them, BE capt,y The calculation formula is as follows:

[0062] BE capt,y =EG capt,PJ,y ×EF BL,FF (4)

[0063] Among them, BE capt,y is the baseline emissions of captive power plant electricity replaced by hydrogen energy storage project activities in year y, in tons of carbon dioxide tCO2, EG capt,PJ,y The electricity generated by the self-contained power plant replaced by the hydrogen energy storage project in year y, in megawatt hours (MWh), EF BL,FFCO2 emission factor for captive power plants using fossil fuels, expressed in tonnes of CO2 per megawatt-hour (tCO2 / MWh).

[0064] Optionally, the carbon emissions of the hydrogen energy storage power station are calculated using the following formula:

[0065] PE y =PE EC,y +PE FC,y +PE H2-l,y (5)

[0066] Among them, PE y is the project emissions in year y, in tons of carbon dioxide tCO2, PE EC,y =Emissions from electricity consumption from sources other than self-provided wind / photovoltaic power plants due to project activities in year y, in tons of carbon dioxide tCO2, PE FC,y = is the emission of fossil fuels consumed by project activities in year y, in tons of carbon dioxide tCO2, PE H2-l,y The project emissions caused by the physical leakage of hydrogen in the project activities in year y, in tons of carbon dioxide tCO2;

[0067] Among them, PE EC,y The calculation formula is as follows:

[0068] PE EC,y =EC non-re,y ×EF non-re (6)

[0069] Among them, EC non-re,y The amount of electricity consumed from sources other than self-generated wind power or photovoltaic power plants used for the project activity in year y, in megawatt hours (MWh), EF non-re The emission factor for electricity from non-captive wind / photovoltaic power plants, expressed in tons of carbon dioxide per megawatt-hour (tCO2 / MWh);

[0070] Among them, PE FC,y The calculation formula is as follows:

[0071] PE FC,y =∑ i FC i,PJ,y ×NCV i ×EF CO2,i (7)

[0072] Among them, FC i,PJ,y The consumption of fossil fuel i in the project activity in year y, in tons or 10,000 standard cubic meters (t) or 10,000 Nm 3 , NCV iis the net calorific value of fossil fuel i, expressed in GJ / t or GJ / 10,000 Nm 3 , E.F. CO2,i is the CO2 emission factor of fossil fuel i, in tons of carbon dioxide per gigajoules (tCO2 / GJ), where i is the type of fossil fuel;

[0073] Among them, PE H2-l,y The calculation formula is as follows:

[0074] PE H2-l,y =M H2,PJ,y ×PL H2 ×GWP H2 (8)

[0075] Among them, PE H2-l,y In year y, the project emissions caused by physical leakage of hydrogen in project activities, in tons of carbon dioxide tCO2, M H2,PJ,y The mass of hydrogen produced by the hydrogen production unit in the project activity in year y, in tons, PL H2 is the proportion of physical leakage of hydrogen in the value chain, expressed in %, GWP H2 The greenhouse gas warming potential of hydrogen is expressed in tonnes of carbon dioxide per tonne of hydrogen, tCO2 / tH2.

[0076] Optionally, a calculation formula for quantifying the carbon emission reduction benefit of the hydrogen energy storage power station is as follows:

[0077] ER y =BE y -PE y (9).

[0078] In yet another aspect, the present invention further provides a computing device, comprising: one or more processors;

[0079] a processor for executing one or more programs;

[0080] When the one or more programs are executed by the one or more processors, the above-described method is implemented.

[0081] In yet another aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed, the method described above is implemented.

[0082] Compared with the prior art, the present invention has the following beneficial effects:

[0083] The present invention provides a method for quantitatively evaluating the carbon emission reduction benefits of a hydrogen energy storage power station, comprising: for a hydrogen energy storage power station, determining the project boundary of the hydrogen energy storage power station, and identifying a baseline scenario within the project boundary; for the identified baseline scenario, calculating the carbon emissions of the baseline in the baseline scenario; calculating the carbon emissions of the hydrogen energy storage power station, and quantifying the carbon emission reduction benefits of the hydrogen energy storage power station based on the carbon emissions of the hydrogen energy storage power station and the carbon emissions of the baseline. The present invention can calculate the annual carbon emission reduction of a hydrogen energy storage power station based on the baseline scenario and the project carbon emissions. The calculation process is simple, the amount of electrical energy required to be measured is small, and the carbon emission reduction benefits of a hydrogen energy storage power station can be effectively quantified. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] Figure 1 is a flow chart of the method of the present invention;

[0085] Figure 2 This is a schematic diagram of the boundary of a hydrogen energy storage power station project according to the method of the present invention;

[0086] Figure 3 It is a structural diagram of the system of the present invention. DETAILED DESCRIPTION

[0087] Now, exemplary embodiments of the present invention are described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0088] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0089] Embodiment 1:

[0090] The present invention proposes a method for quantitatively evaluating the carbon emission reduction benefits of hydrogen energy storage power plants, such as Figure 1 As shown, including:

[0091] Step 1: Clarify the boundaries of the hydrogen energy storage power station project;

[0092] Step 2: Identify the baseline scenario;

[0093] Step 3: Calculate baseline carbon emissions;

[0094] Step 4: Calculate the carbon emissions of hydrogen energy storage power stations;

[0095] Step 5: Calculate the carbon emission reduction benefits of the hydrogen energy storage power station.

[0096] Among them, the first step is to clarify the boundaries of the hydrogen energy storage power station project.

[0097] The boundaries of the hydrogen energy storage power station project include wind power or photovoltaic power plants, all facilities of the hydrogen energy storage power station, and the power grid connected to the energy storage power station. Figure 2 shown.

[0098] Among them, the second step: identify the baseline scenario.

[0099] The hydrogen energy storage power station itself does not generate electricity. The electricity it provides for the peak-shaving and valley-filling scheduling of the power system is essentially still part of the renewable energy power plant. The baseline should be one of the following two scenarios or a combination:

[0100] (1) For hydrogen energy storage projects that generate electricity and are connected to the grid, the baseline scenario is that the grid-connected electricity generated by the project activities can be replaced by existing and newly built grid-connected power plants in the power system;

[0101] (2) For hydrogen energy storage projects that are directly connected to power generation loads, the baseline scenario is the user's original electricity usage scenario, such as a self-owned power plant, grid power, or a mixed source.

[0102] Among them, the third step: calculate baseline carbon emissions.

[0103] For hydrogen energy storage projects, baseline emissions only include CO2 emissions from fossil fuel power plants replaced by project activities. The calculation formula is as follows:

[0104] BE y =BE grid,y +BE capt,y (5)

[0105] Among them, BE y is the baseline emissions of the project in year y, in tons of carbon dioxide (tCO2); BE grid,y is the baseline emissions of grid electricity replaced by the project activity in year y, in tons of carbon dioxide (tCO2); BE capt,y The baseline emissions of captive power plant electricity replaced by the project activity in year y, in tons of carbon dioxide (tCO2).

[0106] Baseline emissions BE due to grid electricity displaced by project activities grid,y The calculation formula is as follows:

[0107] BE grid,y =EG grid,PJ,y ×EF grid,CM,y (2)

[0108] Among them, EG grid,PJ,y The amount of electricity generated by the hydrogen energy storage project on the grid in year y, in megawatt-hours (MWh); EF grid,CM,y is the combined marginal emission factor of the power grid in the project area in year y, expressed in tons of carbon dioxide per megawatt-hour (tCO2 / MWh).

[0109] According to the "Electricity System Emission Factor Calculation Tool", the combined marginal emission factor EF of the power grid in the project area in year y grid,CM,y The calculation formula is as follows:

[0110] EF grid,CM,y =EF grid , OM,y ×ω OM +EF grid,BM,y ×ω BM (3)

[0111] Among them, EF grid,CM,y EF is the combined marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt-hour (tCO2 / MWh); grid , OM,y EF is the marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt-hour (tCO2 / MWh); grid,BM,y is the capacity marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt-hour (tCO2 / MWh); OM is the weight of the marginal emission factor of electricity; ω BM is the weight of the capacity marginal emission factor.

[0112] Baseline emissions BE of captive power plant electricity displaced by hydrogen storage project activities capt,y The calculation formula is as follows:

[0113] BE capt,y =EG capt,PJ,y ×EF BL,FF (4)

[0114] Among them, BE capt,y is the baseline emissions of captive power plant electricity replaced by hydrogen energy storage project activities in year y, in tons of carbon dioxide (tCO2); EG capt,PJ,y The electricity of the self-provided power plant replaced by the hydrogen energy storage project in year y, in megawatt-hours (MWh); EF BL,FF CO2 emission factor for captive power plants using fossil fuels, expressed in tonnes of CO2 per megawatt-hour (tCO2 / MWh).

[0115] Among them, the fourth step: calculate the carbon emissions of the hydrogen energy storage power station.

[0116] For hydrogen energy storage projects, project emissions include emissions from electricity consumption other than self-provided wind power / photovoltaic power plants, emissions from any fossil fuel consumption (such as hydrogen transportation), and emissions from physical leakage of hydrogen. The calculation formula is as follows:

[0117] PE y =PE EC,y +PE FC,y +PE H2-l,y (5)

[0118] Among them, PE y is the project emissions in year y, in tons of carbon dioxide (tCO2); PE EC,y It is the emission generated by the consumption of electricity from sources other than self-provided wind power / photovoltaic power plants due to project activities (such as operation of electrolytic hydrogen production equipment, hydrogen compression equipment, pipeline transportation equipment, hydrogen storage equipment, etc.) in year y, in tons of carbon dioxide (tCO2); PE FC,y is the emissions from fossil fuels consumed by project activities (such as hydrogen transportation) in year y, in tons of carbon dioxide (tCO2); PE H2-l,y It is the project emissions caused by physical leakage of hydrogen in project activities in year y, in tons of carbon dioxide (tCO2).

[0119] Project PE emissions due to electricity consumption other than self-owned wind / photovoltaic power plants EC,y The calculation formula is as follows:

[0120] PE EC,y =EC non-re,y ×EF non-re (6)

[0121] Among them, EC non-re,y The electricity consumption from sources other than self-owned wind power / photovoltaic power plants used for the project activity in year y, in megawatt hours (MWh); EF non-re Emission factor for electricity from sources other than self-contained wind / photovoltaic power plants, expressed in tonnes of carbon dioxide per megawatt-hour (tCO2 / MWh).

[0122] Project emissions PE due to any fossil fuel consumption (e.g. hydrogen transportation) FC,y The calculation formula is as follows:

[0123] PE FC,y =∑ i FC i,PJ,y ×NCV i ×EF CO2,i (7)

[0124] Among them, FC i,PJ,y The consumption of fossil fuel i in the project activity in year y, in tons or 10,000 Nm 3 ); NCV i is the net calorific value of fossil fuel i, expressed in GJ / t or GJ / 10,000 Nm 3 );EF CO2,i is the CO2 emission factor of fossil fuel i, expressed in tons of carbon dioxide per gigajoules (tCO2 / GJ); i is the type of fossil fuel.

[0125] If the project participants do not take measures to reduce hydrogen leakage, the project emissions PE caused by physical leakage of hydrogen in its value chain should be calculated. H2-l,y , the calculation formula is as follows:

[0126] PE H2-l,y =M H2,PJ,y ×PL H2 ×GWP H2 (8)

[0127] Among them, PE H2-l,y In year y, the project emissions caused by physical leakage of hydrogen in project activities, in tons of carbon dioxide (tCO2); M H2,PJ,y The mass of hydrogen produced by the hydrogen production device in the project activity in year y, in tons (t); PL H2 is the proportion of physical leakage of hydrogen in the value chain, in % (%); GWP H2 Greenhouse gas warming potential of hydrogen, expressed in tonnes of carbon dioxide per tonne of hydrogen (tCO2 / tH2).

[0128] Among them, the fifth step: calculate the carbon emission reduction of the hydrogen energy storage power station.

[0129] For hydrogen energy storage projects, the emission reduction is the difference between baseline emissions and project emissions, calculated as follows:

[0130] ER y =BE y -PE y (9)

[0131] Embodiment 2:

[0132] The present invention also proposes a system 200 for quantitatively evaluating the carbon emission reduction benefits of a hydrogen energy storage power station, such as Figure 3 As shown, including:

[0133] A first calculation unit 201 is used to determine a project boundary of a hydrogen energy storage power station and identify a baseline scenario within the project boundary;

[0134] A second calculation unit 202 is used to calculate the baseline carbon emissions in the baseline scenario for the identified baseline scenario;

[0135] The third calculation unit 203 is used to calculate the carbon emissions of the hydrogen energy storage power station, and quantify the carbon emission reduction benefits of the hydrogen energy storage power station based on the carbon emissions of the hydrogen energy storage power station and the carbon emissions of the baseline.

[0136] The project boundaries of the hydrogen energy storage power station include:

[0137] All facilities of wind power or photovoltaic power plants, hydrogen energy storage power stations and power grids connected to energy storage power stations.

[0138] The baseline scenario includes one or a combination of the following two scenarios:

[0139] (1) For hydrogen energy storage projects that generate electricity and are connected to the grid, the baseline scenario is: the grid-connected electricity generated by the project activities is replaced by existing and newly built grid-connected power plants in the power system;

[0140] (2) For hydrogen energy storage projects with direct power generation and load connection, the baseline scenario is: the user's original electricity usage scenario;

[0141] The user's original electricity usage scenario includes: self-provided power plant, grid power or mixed sources.

[0142] The calculation of the baseline carbon emissions in the baseline scenario includes:

[0143] For hydrogen energy storage projects, the baseline carbon emissions include: CO2 emissions from fossil fuel power plants replaced by project activities, calculated as follows:

[0144] BE y =BE grid,y +BE capt,y (6)

[0145] Among them, BE y is the baseline emissions of the project in year y, in tons of carbon dioxide tCO2, BE grid,y is the baseline emissions of grid electricity replaced by the project activity in year y, in tons of carbon dioxide tCO2, BE capt,y is the baseline emissions of captive power plant electricity replaced by the project activity in year y, in tons of carbon dioxide, tCO2;

[0146] Among them, BE grid,y The calculation formula is as follows:

[0147] BE grid,y =EG grid,PJ,y ×EFgrid,CM,y (2)

[0148] Among them, EG grid,PJ,y The amount of hydrogen energy storage project on-grid electricity in year y is expressed in megawatt hours (MWh), EF grid,CM,y is the combined marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt hour tCO2 / MWh;

[0149] Among them, EF grid,CM,y The calculation formula is as follows:

[0150] EF grid,CM,y =EF grid,OM,y ×ω OM +EF grid,BM,y ×ω BM (3)

[0151] Among them, EF grid,OM,y is the marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt hour tCO2 / MWh, EF grid,BM,y is the capacity marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt hour tCO2 / MWh, ω OM is the weight of the marginal emission factor of electricity, ω BM is the weight of the capacity marginal emission factor;

[0152] Among them, BE capt,y The calculation formula is as follows:

[0153] BE capt,y =EG capt,PJ,y ×EF BL,FF (4)

[0154] Among them, BE capt,y is the baseline emissions of captive power plant electricity replaced by hydrogen energy storage project activities in year y, in tons of carbon dioxide tCO2, EG capt,PJ,y The electricity generated by the self-contained power plant replaced by the hydrogen energy storage project in year y, in megawatt hours (MWh), EF BL,FF CO2 emission factor for captive power plants using fossil fuels, expressed in tonnes of CO2 per megawatt-hour (tCO2 / MWh).

[0155] Among them, the carbon emissions of the hydrogen energy storage power station are calculated, and the calculation formula is as follows:

[0156] PE y =PE EC,y +PE FC,y +PE H2-l,y (5)

[0157] Among them, PEy is the project emissions in year y, in tons of carbon dioxide tCO2, PE EC,y =Emissions from electricity consumption from sources other than self-provided wind / photovoltaic power plants due to project activities in year y, in tons of carbon dioxide tCO2, PE FC,y = is the emission of fossil fuels consumed by project activities in year y, in tons of carbon dioxide tCO2, PE H2-l,y The project emissions caused by the physical leakage of hydrogen in the project activities in year y, in tons of carbon dioxide tCO2;

[0158] Among them, PE EC,y The calculation formula is as follows:

[0159] PE EC,y =EC non-re,y ×EF non-re (6)

[0160] Among them, EC non-re,y The amount of electricity consumed from sources other than self-generated wind power or photovoltaic power plants used for the project activity in year y, in megawatt hours (MWh), EF non-re The emission factor for electricity from non-captive wind / photovoltaic power plants, expressed in tons of carbon dioxide per megawatt-hour (tCO2 / MWh);

[0161] Among them, PE FC,y The calculation formula is as follows:

[0162] PE FC,y =∑ i FC i,PJ,y ×NCV i ×EF CO2,i (7)

[0163] Among them, FC i,PJ,y The consumption of fossil fuel i in the project activity in year y, in tons or 10,000 standard cubic meters (t) or 10,000 Nm 3 , NCV i is the net calorific value of fossil fuel i, expressed in GJ / t or GJ / 10,000 Nm 3 , E.F. CO2,i is the CO2 emission factor of fossil fuel i, in tons of carbon dioxide per gigajoules (tCO2 / GJ), where i is the type of fossil fuel;

[0164] Among them, PE H2-l,y The calculation formula is as follows:

[0165] PE H2-l,y =M H2,PJ,y ×PL H2 ×GWP H2(8)

[0166] Among them, PE H2-l,y In year y, the project emissions caused by physical leakage of hydrogen in project activities, in tons of carbon dioxide tCO2, M H2,PJ,y The mass of hydrogen produced by the hydrogen production unit in the project activity in year y, in tons, PL H2 is the proportion of physical leakage of hydrogen in the value chain, expressed in %, GWP H2 The greenhouse gas warming potential of hydrogen is expressed in tonnes of carbon dioxide per tonne of hydrogen, tCO2 / tH2.

[0167] The calculation formula for quantifying the carbon emission reduction benefits of the hydrogen energy storage power station is as follows:

[0168] ER y =BE y -PE y (9).

[0169] The present invention can calculate the annual carbon emission reduction of the hydrogen energy storage power station based on the baseline scenario and project carbon emissions. The calculation process is simple, the amount of electrical energy required to be measured is small, and the carbon emission reduction benefits of the hydrogen energy storage power station can be effectively quantified.

[0170] Embodiment 3:

[0171] Based on the same inventive concept, the present invention also provides a computer device, which includes a processor and a memory, wherein the memory is used to store a computer program, the computer program includes program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, and is specifically suitable for loading and executing one or more instructions in the computer storage medium to implement the corresponding method flow or corresponding functions, so as to implement the steps of the method in the above embodiment.

[0172] Embodiment 4:

[0173] Based on the same inventive concept, the present invention also provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device for storing programs and data. It is understandable that the computer-readable storage medium here can include both a built-in storage medium in a computer device and an extended storage medium supported by the computer device. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by a processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the steps of the method in the above embodiment.

[0174] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. The schemes in the embodiments of the present invention may be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0175] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0176] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0177] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0178] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0179] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for quantitatively evaluating the carbon emission reduction benefits of a hydrogen energy storage power station, characterized in that: include: For a hydrogen energy storage power station, determining a project boundary of the hydrogen energy storage power station and identifying a baseline scenario within the project boundary; For the identified baseline scenario, calculate the baseline carbon emissions in the baseline scenario; The carbon emissions of the hydrogen energy storage power station are calculated, and based on the carbon emissions of the hydrogen energy storage power station and the carbon emissions of a baseline, the carbon emission reduction benefits of the hydrogen energy storage power station are quantified.

2. The method according to claim 1, characterized in that The project boundaries of the hydrogen energy storage power station include: All facilities of wind power or photovoltaic power plants, hydrogen energy storage power stations and power grids connected to energy storage power stations.

3. The method according to claim 1, characterized in that The baseline scenario includes one or a combination of the following two scenarios: (1) For hydrogen energy storage projects that generate electricity and are connected to the grid, the baseline scenario is: the grid-connected electricity generated by the project activities is replaced by existing and newly built grid-connected power plants in the power system; (2) For hydrogen energy storage projects with direct power generation and load connection, the baseline scenario is: the user's original electricity usage scenario; The user's original electricity usage scenario includes: self-provided power plant, grid power or mixed sources.

4. The method according to claim 1, characterized in that: The calculation of the baseline carbon emissions in the baseline scenario includes: For hydrogen energy storage projects, the baseline carbon emissions include: CO2 emissions from fossil fuel power plants replaced by project activities, calculated as follows: BE y =BE grid,y +BE capt,y (1) Among them, BE y is the baseline emissions of the project in year y, in tons of carbon dioxide tCO2, BE grid,y is the baseline emissions of grid electricity replaced by the project activity in year y, in tons of carbon dioxide tCO2, BE capt,y is the baseline emissions of captive power plant electricity replaced by the project activity in year y, in tons of carbon dioxide, tCO2; Among them, BE grid,y The calculation formula is as follows: BE grid,y =EG grid,PJ,y ×EF grid,CM,y (2) Among them, EG grid,PJ,y The amount of hydrogen energy storage project on-grid electricity in year y is expressed in megawatt hours (MWh), EF grid,CM,y is the combined marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt hour tCO2 / MWh; Among them, EF grid,CM,y The calculation formula is as follows: IF grid,CM,y =EF grid,OM,y ×ω OM +EF grid,BM,y ×ω BM (3) Among them, EF grid,OM,y is the marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt hour tCO2 / MWh, EF grid,BM,y is the capacity marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt hour tCO2 / MWh, ω OM is the weight of the marginal emission factor of electricity, ω BN is the weight of the capacity marginal emission factor; Among them, BE capt,y The calculation formula is as follows: BE capt,y =EG capt,PJ,y ×EF BL,FF (4) Among them, BE capt,y is the baseline emissions of captive power plant electricity replaced by hydrogen energy storage project activities in year y, in tons of carbon dioxide tCO2, EG capt,PJ,y The electricity generated by the self-contained power plant replaced by the hydrogen energy storage project in year y, in megawatt hours (MWh), EF BL,FF CO2 emission factor for captive power plants using fossil fuels, expressed in tonnes of CO2 per megawatt-hour (tCO2 / MWh).

5. The method according to claim 1, characterized in that The carbon emissions of the hydrogen energy storage power station are calculated using the following formula: ON y =PE EC,y +PE FC,y +PE H2-l,y (5) Among them, PE y is the project emissions in year y, in tons of carbon dioxide tCO2, PE EC,y =Emissions from electricity consumption from sources other than self-provided wind / photovoltaic power plants due to project activities in year y, in tons of carbon dioxide tCO2, PE FC,y = is the emission of fossil fuels consumed by project activities in year y, in tons of carbon dioxide tCO2, PE H2-l,y The project emissions caused by the physical leakage of hydrogen in the project activities in year y, in tons of carbon dioxide tCO2; Among them, PE EC,y The calculation formula is as follows: PE EC,y =EC non-re,y ×EF non-re (6) Among them, EC non-re,y The amount of electricity consumed from sources other than self-generated wind power or photovoltaic power plants used for the project activity in year y, in megawatt hours (MWh), EF non-re The emission factor for electricity from non-captive wind / photovoltaic power plants, expressed in tons of carbon dioxide per megawatt-hour (tCO2 / MWh); Among them, PE FC,y The calculation formula is as follows: PE FC,y =∑ i FC i,PJ,y ×NCV i ×EF CO2,i (7) Among them, FC i,PJ,y The consumption of fossil fuel i in the project activity in year y, in tons or 10,000 standard cubic meters (t) or 10,000 Nm 3 , NCV i is the net calorific value of fossil fuel i, expressed in GJ / t or GJ / 10,000 Nm 3 , E.F. CO2,i is the CO2 emission factor of fossil fuel i, in tons of carbon dioxide per gigajoules (tCO2 / GJ), where i is the type of fossil fuel; Among them, PE H2-l,y The calculation formula is as follows: ON H2-l,y =M H2,PJ,y ×PL H2 ×GWP H2 (8) Among them, PE H2-l,y In year y, the project emissions caused by physical leakage of hydrogen in project activities, in tons of carbon dioxide tCO2, M H2,PJ,y The mass of hydrogen produced by the hydrogen production unit in the project activity in year y, in tons, PL H2 is the proportion of physical leakage of hydrogen in the value chain, expressed in %, GWP H2 The greenhouse gas warming potential of hydrogen is expressed in tonnes of carbon dioxide per tonne of hydrogen, tCO2 / tH2.

6. The method according to claim 1, characterized in that The calculation formula for quantifying the carbon emission reduction benefits of the hydrogen energy storage power station is as follows: IS y =BE y -PE y (9).

7. A system for quantitatively evaluating the carbon emission reduction benefits of a hydrogen energy storage power station, characterized in that: include: A first calculation unit is used to determine a project boundary of the hydrogen energy storage power station and identify a baseline scenario within the project boundary; A second calculation unit is used to calculate the baseline carbon emissions in the baseline scenario for the identified baseline scenario; The third calculation unit is used to calculate the carbon emissions of the hydrogen energy storage power station, and quantify the carbon emission reduction benefits of the hydrogen energy storage power station based on the carbon emissions of the hydrogen energy storage power station and the carbon emissions of a baseline.

8. The system according to claim 7, characterized in that The project boundaries of the hydrogen energy storage power station include: All facilities of wind power or photovoltaic power plants, hydrogen energy storage power stations and power grids connected to energy storage power stations.

9. The system according to claim 7, characterized in that The baseline scenario includes one or a combination of the following two scenarios: (1) For hydrogen energy storage projects that generate electricity and are connected to the grid, the baseline scenario is: the grid-connected electricity generated by the project activities is replaced by existing and newly built grid-connected power plants in the power system; (2) For hydrogen energy storage projects with direct power generation and load connection, the baseline scenario is: the user's original electricity usage scenario; The user's original electricity usage scenario includes: self-provided power plant, grid power or mixed sources.

10. The system according to claim 7, characterized in that The calculation of the baseline carbon emissions in the baseline scenario includes: For hydrogen energy storage projects, the baseline carbon emissions include: CO2 emissions from fossil fuel power plants replaced by project activities, calculated as follows: BE y =BE grid,y +BE capt,y (2) Among them, BE y is the baseline emissions of the project in year y, in tons of carbon dioxide tCO2, BE grid,y is the baseline emissions of grid electricity replaced by the project activity in year y, in tons of carbon dioxide tCO2, BE capt,y is the baseline emissions of captive power plant electricity replaced by the project activity in year y, in tons of carbon dioxide, tCO2; Among them, BE grid,y The calculation formula is as follows: BE grid,y =EG grid,PJ,y ×EF grid,CM,y (2) Among them, EG grid,PJ,y The amount of hydrogen energy storage project on-grid electricity in year y is expressed in megawatt hours (MWh), EF grid,CM,y is the combined marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt hour tCO2 / MWh; Among them, EF grid,CM,y The calculation formula is as follows: IF grid,CM,y =EF grid,OM,y ×ω OM +EF grid,BM,y ×ω BM (3) Among them, EF grid,OM,y is the marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt hour tCO2 / MWh, EF grid,BM,y is the capacity marginal emission factor of the power grid in the project area in year y, in tons of carbon dioxide per megawatt hour tCO2 / MWh, ω OM is the weight of the marginal emission factor of electricity, ω BM is the weight of the capacity marginal emission factor; Among them, BE capt,y The calculation formula is as follows: BE capt,y =EG capt,PJ,y ×EF BL,FF (4) Among them, BE capt,y is the baseline emissions of captive power plant electricity replaced by hydrogen energy storage project activities in year y, in tons of carbon dioxide tCO2, EG capt,PJ,y The electricity generated by the self-contained power plant replaced by the hydrogen energy storage project in year y, in megawatt hours (MWh), EF BL,FF CO2 emission factor for captive power plants using fossil fuels, expressed in tonnes of CO2 per megawatt-hour (tCO2 / MWh).

11. The system according to claim 7, characterized in that The carbon emissions of the hydrogen energy storage power station are calculated using the following formula: ON y =PE EC,y +PE FC,y +PE H2-l,y (5) Among them, PE y is the project emissions in year y, in tons of carbon dioxide tCO2, PE EC,y =Emissions from electricity consumption from sources other than self-provided wind / photovoltaic power plants due to project activities in year y, in tons of carbon dioxide tCO2, PE FC,y = is the emission of fossil fuels consumed by project activities in year y, in tons of carbon dioxide tCO2, PE H2-l,y The project emissions caused by the physical leakage of hydrogen in the project activities in year y, in tons of carbon dioxide tCO2; Among them, PE EC,y The calculation formula is as follows: PE EC,y =EC non-re,y ×EF non-re (6) Among them, EC non-re,y The amount of electricity consumed from sources other than self-generated wind power or photovoltaic power plants used for the project activity in year y, in megawatt hours (MWh), EF non-re The emission factor for electricity from non-captive wind / photovoltaic power plants, expressed in tons of carbon dioxide per megawatt-hour (tCO2 / MWh); Among them, PE FC,y The calculation formula is as follows: PE FC,y =∑ i FC i,PJ,y ×NCV i ×EF CO2,i (7) Among them, FC i,PJ,y The consumption of fossil fuel i in the project activity in year y, in tons or 10,000 standard cubic meters (t) or 10,000 Nm 3 , NCV i is the net calorific value of fossil fuel i, expressed in GJ / t or GJ / 10,000 Nm 3 , E.F. CO2,i is the CO2 emission factor of fossil fuel i, in tons of carbon dioxide per gigajoules (tCO2 / GJ), where i is the type of fossil fuel; Among them, PE H2-l,y The calculation formula is as follows: ON H2-l,y =M H2,PJ,y ×PL H2 ×GWP H2 (8) Among them, PE H2-l,y In year y, the project emissions caused by physical leakage of hydrogen in project activities, in tons of carbon dioxide tCO2, M H2,PJ,y The mass of hydrogen produced by the hydrogen production unit in the project activity in year y, in tons, PL H2 is the proportion of physical leakage of hydrogen in the value chain, expressed in %, GWP H2 The greenhouse gas warming potential of hydrogen is expressed in tonnes of carbon dioxide per tonne of hydrogen, tCO2 / tH2.

12. The system according to claim 7, characterized in that The calculation formula for quantifying the carbon emission reduction benefits of the hydrogen energy storage power station is as follows: IS y =BE y -PE y (9).

13. A computer device, characterized in that: include: one or more processors; a processor for executing one or more programs; When the one or more programs are executed by the one or more processors, the method according to any one of claims 1 to 6 is implemented.

14. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed, the method according to any one of claims 1 to 6 is implemented.

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