Carbon emission reduction quantification method and device for power grid side electrochemical energy storage power station project

Abstract

The invention discloses a carbon emission reduction quantification method and device for a power grid side electrochemical energy storage power station project, and the method comprises the steps: firstly, calculating a reference line emission amount and a project emission amount according to a reference line scene and a project scene, and then obtaining the project emission reduction amount based on the reference line emission amount and the project emission amount. The constructed carbon emission reduction quantitative model is suitable for a new power grid side electrochemical energy storage power station project, can accurately evaluate the emission reduction contribution of the project, can also be applied to the current and future emission reduction effect evaluation of the project, judges whether the emission reduction effect of the project meets the expectation or not, and improves the construction efficiency. And a scientific and effective carbon emission reduction management basis can be provided for later development of a power grid side electrochemical energy storage power station project.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon emission reduction management, and specifically relates to a carbon emission reduction quantification method and equipment for a grid-side electrochemical energy storage power station project. Background Art

[0002] Low-carbon and zero-carbon goals promote the development of new energy, but the volatility of new energy generation requires energy storage systems to balance and promote the evolution of the power system. Electrochemical energy storage is a key technology supporting new energy systems and power systems. As the global carbon neutrality process advances, the energy storage industry is facing unprecedented opportunities.

[0003] As electrochemical energy storage technology matures, the application scenarios of energy storage batteries are further expanded. From the perspective of the power system, the application scenarios of electrochemical energy storage are mainly divided into the power supply side, the grid side, and the user side. The grid side applications include optimizing the grid structure, participating in peak load and frequency regulation, and improving power quality. They mainly serve power grid companies, including independent energy storage power stations and substation supporting energy storage.

[0004] Establishing a scientific carbon emission reduction quantitative model based on the production and operation characteristics of the power grid is the basis for conducting quantitative assessment of the carbon emission reduction contribution of power grid investment projects. However, for grid-side electrochemical energy storage power station projects, there is currently no scientific carbon emission reduction quantitative model established, making it difficult to provide a basis for carbon emission reduction management for the subsequent development of grid-side electrochemical energy storage power station projects. Summary of the invention

[0005] Purpose of the invention: In view of the above shortcomings, the present invention provides a carbon emission reduction quantification method and equipment for a grid-side electrochemical energy storage power station project, which can accurately evaluate the emission reduction contribution of the project and provide a scientific and effective carbon emission reduction management basis for the subsequent development of grid-side electrochemical energy storage power station projects.

[0006] Invention content: To achieve the above objectives, the present invention provides a method for quantifying carbon emission reduction of a grid-side electrochemical energy storage power station project. First, the baseline emissions and project emissions are calculated according to the baseline scenario and the project scenario, respectively. The calculation method is as follows:

[0007] 1) The calculation method of baseline emissions is:

[0008] BE y =EG PJ，y ×EF grid，CM，y ,

[0009] Among them, BE y represents the baseline emissions in year y;

[0010] EG PJ，y It represents the amount of renewable energy grid-connected electricity generated by the implementation of the project activities in year y;

[0011] EF grid，DM，y represents the combined marginal CO of grid-connected power generation in year y 2 Emission factors;

[0012] 2) The calculation method of project emissions is:

[0013] PE y =EG OGE，y ×EF grid，y ,

[0014] Among them, PE y represents the project emissions in year y;

[0015] EG OGE，y It represents the off-grid electricity consumed by the electrochemical energy storage power station in its own operation in year y;

[0016] EF grid，y represents the regional grid emission factor for year y;

[0017] Then, based on the baseline emissions and the project emissions, the project emission reduction can be obtained:

[0018] ER y =BE y -PE y ,

[0019] Among them, ER y Represents the emission reduction of the project in year y.

[0020] Specifically, EG PJ，y The calculation method is:

[0021] EG PJ,y =EG facility,y ;

[0022] Among them, EG facility，y It indicates the grid-connected electricity consumption of renewable energy corresponding to the grid-connected electricity consumption of electrochemical energy storage power station in year y.

[0023] Furthermore, EG facility，y The calculation method is:

[0024]

[0025] Among them, EG GE，i，y It represents the online power consumption of the electrochemical energy storage power station for the i-th charge and discharge in year y;

[0026] t sun，i It represents the total charging time of the i-th charge and discharge of the electrochemical energy storage power station in year y;

[0027] i represents the i-th charge and discharge of the electrochemical energy storage power station in year y;

[0028] t ij It represents the charging time of the i-th charge and discharge of the electrochemical energy storage power station in the j-th period in year y;

[0029] f j It indicates the proportion of renewable energy electricity in the off-grid charging electricity of the electrochemical energy storage power station in the jth period in year y.

[0030] Specifically, E.F. grid，CM，y The calculation method is:

[0031] EF grid,CM,y =EF grid,OM,y ×W OM +EF grid,BM,y ×W BM ,

[0032] Among them, EF grid，OM，y represents the marginal emission factor of electricity in year y;

[0033] EF grid，BM，y represents the capacity marginal emission factor in year y;

[0034] W OM Represents the weight of marginal emission factor of electricity quantity;

[0035] W BM Represents the capacity marginal emission factor weight.

[0036] In addition, the present invention also provides a carbon emission reduction quantification device for a grid-side electrochemical energy storage power station project, comprising a data-connected processing unit and a storage unit, wherein the storage unit is used to store the carbon emission reduction data of the grid-side electrochemical energy storage power station project for the processing unit to perform quantitative calculations according to the above-mentioned carbon emission reduction quantification method.

[0037] Beneficial effects: Grid-side electrochemical energy storage power station projects can provide the same or better effects of absorbing new energy and shaving peaks and filling valleys as compared with the baseline scenario, thereby achieving greenhouse gas emission reduction. The carbon emission reduction quantification model constructed by the present invention is suitable for newly built grid-side electrochemical energy storage power station projects. It can accurately evaluate the emission reduction contribution of the project, and can also be applied to the current and future emission reduction effect evaluation of the project to determine whether the emission reduction effect of the project meets expectations. It can provide a scientific and effective carbon emission reduction management basis for the development of future grid-side electrochemical energy storage power station projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Flow chart of the carbon emission reduction quantification method in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below, and preferred embodiments of the present invention are provided. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0040] Reference Figure 1 The present invention provides a carbon emission reduction quantification method for a grid-side electrochemical energy storage power station project, which is applicable to a newly built grid-side electrochemical energy storage power station project. The grid-side electrochemical energy storage power station project can provide the same or better effect of absorbing new energy and shaving peaks and filling valleys as compared with the baseline scenario, thereby achieving greenhouse gas emission reduction. The baseline scenario is that the new energy grid-connected electricity absorbed by the project can be replaced by grid-connected power plants and their newly added power generation sources.

[0041] 1. Applicable conditions;

[0042] This approach is applicable to the following project activities:

[0043] (1) Newly built grid-side electrochemical energy storage power stations should be connected to the local grid through independent collection lines, and the electricity consumption can be measured separately;

[0044] (2) When building a new grid-side electrochemical energy storage power station, there was no energy storage power station project at the construction site.

[0045] This method is applicable to the following conditions:

[0046] (1) The project boundaries are clear and definable;

[0047] (2) The project must have the function and role of grid-side electrochemical energy storage, and the project activities can provide the same or better effects of absorbing new energy and shaving peaks and filling valleys as compared with the baseline scenario;

[0048] (3) The grid-side electrochemical energy storage power station in the project activity is not mandatory;

[0049] (4) Only the carbon emission reduction caused by the grid-side electrochemical energy storage power station absorbing new energy and peak-shaving and valley-filling is calculated;

[0050] 2. Project boundaries and emission sources;

[0051] The spatial scope of the project boundary includes the regional power grid that provides excess electricity, the grid-side electrochemical energy storage power station that receives the electricity, and all power generation facilities connected to the power grid of this project. The baseline emission source is the CO2 generated by the fossil fuel power plant that is replaced by the project activities. 2 Emissions. The emission sources of project activities are the emissions generated by the electricity consumed by project activities. The electricity consumed by the operation of the electrochemical energy storage power station on the grid side is the off-grid electricity.

[0052] 3. Baseline scenario identification;

[0053] The baseline scenario applicable to this method is that the renewable energy grid-connected electricity consumed by the project activities can be replaced by grid-connected power plants and their new power generation sources.

[0054] 4. Baseline emission calculation;

[0055] (1) The baseline emissions here only consider the CO2 generated by fossil fuel generators replaced by the renewable energy grid-connected electricity consumed by the project activities. 2 Emissions. The calculation method for baseline emissions is as follows:

[0056] BE y =EG PJ， y×EF grid,CM,y ,

[0057] Among them, BE y represents the baseline emissions in year y (tCO 2 e / yr);

[0058] EGP J，y It represents the amount of renewable energy grid-connected electricity generated by the implementation of the project activities in year y (MWh / yr);

[0059] EF grid，CM，y represents the combined marginal CO of grid-connected power generation in year y 2 Emission factor (tCO 2 / MWh), obtained using the “Power System Emission Factor Calculation Tool”.

[0060] (2) Combined marginal CO 2 Emission Factor EF grid，CM，y The calculation method is as follows:

[0061] EF grid,CM,y =EF grid,OM,y ×W OM +EF grid,BM,y ×W BM ,

[0062] Among them, EF grid，OM，y represents the marginal emission factor of electricity in year y (tCO 2 / MWh), using the marginal emission factors of regional power grid electricity recently announced by the Ministry of Ecology and Environment;

[0063] EF grid，BM，y represents the capacity marginal emission factor in year y (tCO 2 / MWh), using the marginal emission factors of regional power grid electricity recently announced by the Ministry of Ecology and Environment;

[0064] WOM Indicates the marginal emission factor weight (%) of electricity, the first accounting period and subsequent accounting periods W OM =0.75;

[0065] W BM Indicates the capacity marginal emission factor weight (%), the first crediting period and subsequent crediting periods W BM =0.25.

[0066] (3) Before the implementation of the project activities, there was no grid-side electrochemical energy storage power station in operation at the project site, so EG PJ，y The calculation method is as follows:

[0067] EG PJ,y =EG facility,y ,

[0068] Among them, EG facilty，y It represents the grid-connected electricity consumption of renewable energy corresponding to the grid-connected electricity consumption of electrochemical energy storage power station in year y (MWh / yr).

[0069] (4) The proportion of renewable energy consumed by electrochemical energy storage power stations during charging at different times of the day is different. Combining the amount of electricity online, charging time and the proportion of renewable energy consumed at different times, EG facility，y The calculation method is as follows:

[0070]

[0071] Among them, EG GE，i，y Indicates the grid-connected electricity (MWh) of the i-th charge and discharge of the electrochemical energy storage power station in year y;

[0072] t sum，i It represents the total charging time of the i-th charge and discharge of the electrochemical energy storage power station in year y (h);

[0073] i represents the i-th charge and discharge of the electrochemical energy storage power station in year y;

[0074] t ij Indicates the charging time (h) of the i-th charge and discharge of the electrochemical energy storage power station in the j-th period in year y;

[0075] f j It indicates the proportion of renewable energy electricity in the off-grid charging electricity of the electrochemical energy storage power station in the jth period in year y (%).

[0076] 5. Project emission calculation;

[0077] In the project scenario, the grid-side electrochemical energy storage power station uses electricity from the grid, and the project emissions generated are calculated using the following formula:

[0078] PEEy =EG OGE,y ×EF grid,y ,

[0079] Among them, PE y represents the project emissions in year y (tCO 2 e / yr);

[0080] E GOGE，y It represents the off-grid electricity consumed by the electrochemical energy storage power station in its own operation in year y (MWh), i.e., the power used by the plant;

[0081] EF grid，y represents the regional grid emission factor in year y (tCO 2 / MWh), using the regional power grid emission factors recently announced by the Ministry of Ecology and Environment.

[0082] 6. Calculation of project emission reductions;

[0083] The calculation method of the project emission reduction is as follows:

[0084] ER y =BE y -PE y ,

[0085] Among them, ER y Indicates the emission reduction of the project in year y (tCO 2 e / yr).

[0086] In addition, the present invention also provides a carbon emission reduction quantification device for a grid-side electrochemical energy storage power station project, comprising a data-connected processing unit and a storage unit, wherein the storage unit is used to store the carbon emission reduction data of the grid-side electrochemical energy storage power station project, and the processing unit is used to perform quantitative calculations according to the above-mentioned carbon emission reduction quantification method and based on the carbon emission reduction data stored in the storage unit, and the calculation results can be further stored in the storage unit.

[0087] The above specific implementations are only descriptions of the preferred implementations of the present invention, and do not limit the protection scope of the present invention. Without departing from the design concept and spirit of the present invention, various modifications, substitutions and improvements made by ordinary technicians in this field to the technical solution of the present invention based on the text description and drawings provided by the present invention should all fall within the protection scope of the present invention.

Claims

1. A carbon emission reduction quantification method for a grid-side electrochemical energy storage power station project, characterized in that: First, the baseline emissions and project emissions are calculated based on the baseline scenario and project scenario respectively. The calculation method is as follows: 1) The calculation method of baseline emissions is: BE y =EG PJ,y ×EF grid,CM,y , Among them, BE y represents the baseline emissions in year y; EG PJ，y It represents the amount of renewable energy grid-connected electricity generated by the implementation of the project activities in year y; EF grid，CM，y represents the combined marginal CO2 emission factor of grid-connected power generation in year y; 2) The calculation method of project emissions is: PE y =EG OGE,y ×EF grid,y , Among them, PE y represents the project emissions in year y; EG OGE，y It represents the off-grid electricity consumed by the electrochemical energy storage power station in its own operation in year y; EF grid，y represents the regional grid emission factor for year y; Then, based on the baseline emissions and the project emissions, the project emission reduction can be obtained: IS y =BE y -PE y , Among them, ER y Represents the emission reduction of the project in year y.

2. The carbon emission reduction quantification method according to claim 1, characterized in that: EG PJ，y The calculation method is: EG PJ,y =EG facility,y , Among them, EG facility，y It indicates the grid-connected electricity consumption of renewable energy corresponding to the grid-connected electricity consumption of electrochemical energy storage power station in year y.

3. The carbon emission reduction quantification method according to claim 2, characterized in that: EG facility，y The calculation method is: Among them, EG GE，i，y It represents the online power consumption of the electrochemical energy storage power station for the i-th charge and discharge in year y; t sum，i It represents the total charging time of the i-th charge and discharge of the electrochemical energy storage power station in year y; i represents the i-th charge and discharge of the electrochemical energy storage power station in year y; t ij It represents the charging time of the i-th charge and discharge of the electrochemical energy storage power station in the j-th period in year y; f j It represents the proportion of renewable energy electricity in the off-grid charging electricity of the electrochemical energy storage power station in the jth period in year y.

4. The carbon emission reduction quantification method according to claim 1, characterized in that: EF grid，CM，y The calculation method is: IF grid,CM,y =EF grid,OM,y ×W OM +EF grid,BM,y ×W BM , Among them, EF grid，OM，y represents the marginal emission factor of electricity in year y; EF grid，BM，y represents the capacity marginal emission factor in year y; W OM Represents the weight of marginal emission factor of electricity quantity; W BM Represents the capacity marginal emission factor weight.

5. A carbon emission reduction quantification device for a grid-side electrochemical energy storage power station project, characterized in that: It comprises a data-connected processing unit and a storage unit, wherein the storage unit is used to store carbon emission reduction data of a grid-side electrochemical energy storage power station project, so that the processing unit can perform quantitative calculations according to the carbon emission reduction quantification method described in any one of claims 1 to 4.

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