10kV distribution transformer production link carbon emission accounting method

Abstract

The invention discloses a 10kV distribution transformer production link carbon emission accounting method, and belongs to the field of carbon emission calculation. Comprising the steps of determining a boundary range of carbon emission accounting of a transformer in a manufacturing stage according to a transformer production process flow, sorting energy consumption equipment of each production process of a transformer product around the carbon emission accounting range, identifying an energy emission type of the energy consumption equipment, compiling a carbon emission accounting list of a 10kV transformer production link according to the emission type, and checking the carbon emission accounting list of the 10kV transformer production link according to the carbon emission accounting list. And according to the carbon emission accounting list, configuring a 10kV transformer production emission calculation formula, combining emission calculation parameters, determining data requirements of activity data, emission factors and the like, and based on a production link accounting method, collecting data required by accounting, and calculating the carbon emission of the transformer in the production link. The carbon emission calculation logic of the transformer production link is solidified, a referential and standardized method is provided for carbon emission accounting of transformer production enterprises, and a support is provided for scientifically monitoring carbon emission in the production process and formulating a carbon emission reduction scheme.

Description

Technical Field

[0001] This invention belongs to the field of carbon emission calculation, and in particular relates to a carbon emission accounting method for the production process of 10kV distribution transformers. Background Technology

[0002] Carbon emissions refer to the amount of greenhouse gases emitted during the production, transportation, use, and recycling of a product. Dynamic carbon emissions, on the other hand, refer to the cumulative amount of greenhouse gases emitted per unit of goods; different batches of the same product may have different dynamic carbon emissions.

[0003] To implement the national "dual carbon" strategy, as the world's largest industrial country, promoting carbon emission reduction in the industrial manufacturing sector is one of the key directions for achieving green and low-carbon development.

[0004] The large-scale construction of my country's power grid and the development of urban distribution networks have created a significant demand for 10kV distribution transformers. Transformer manufacturers promoting green transformation can enhance their green competitiveness and serve energy transition and green economic and social development. The primary task is to conduct thorough carbon emission accounting, providing more comprehensive and scientific methodological support for developing scientific carbon emission accounting methods for transformer production, establishing a carbon monitoring system for transformer production processes, and formulating carbon reduction plans for transformer manufacturers.

[0005] Therefore, studying carbon emission accounting methods in the production process of 10kV transformers has important theoretical and practical significance.

[0006] The invention patent application with publication date of February 21, 2025, and publication number CN 119494547A, discloses "A method for carbon emission accounting in the quality inspection of 10kV distribution transformers," including: clarifying the accounting boundaries; compiling an accounting list; configuring calculation methods; locking calculation parameters; conducting emission accounting; and constructing a calculation model to support carbon emission accounting in the transformer quality inspection process. It delves into the business process of power grid material quality inspection, using 10kV oil-immersed distribution transformers as a category to construct a standard carbon emission calculation method; it covers the entire process and all stages of transformer inspection, identifying each emission source of the inspection item, establishing an emission accounting list, configuring calculation methods for each emission source in the list, locking the basic data required for calculation, forming a carbon emission calculation method and model for power material quality inspection, and creating a scientific and clear emission calculation method for the quality inspection process. Because it only targets carbon emission accounting during the quality inspection stage of power materials and does not consider carbon emission accounting during the production process of 10kV distribution transformers, it cannot be applied to carbon emission accounting for 10kV distribution transformers throughout the entire production process.

[0007] Patent application CN 118469122A, published on August 9, 2024, discloses a "method and apparatus for calculating carbon emissions of power transformers based on life cycle assessment." The method includes obtaining the original parameters of the power transformer whose carbon emissions are to be calculated; obtaining carbon emission data for each stage of the power transformer's life cycle based on the original parameters from a pre-established carbon emission database; calculating the carbon emission amount for each stage based on the carbon emission data for each stage; and calculating the total carbon emissions of the power transformer throughout its entire life cycle based on the carbon emission amounts for N stages. This technical solution, by retrieving the transformer's carbon emission data from a carbon emission database for accurate calculation, improves the consistency and reliability of power transformer carbon footprint accounting and facilitates the identification and analysis of emission reduction potential throughout the power transformer's life cycle. However, based on a pre-established carbon emission database, it conducts a full life-cycle carbon footprint assessment for each power transformer. On the one hand, the establishment of its carbon emission database requires a large amount of underlying data support. On the other hand, it conducts a phased full life-cycle carbon footprint assessment for a specific power transformer, focusing more on carbon emission calculations based on each stage of the transformer's entire life cycle (including at least the stages of raw material acquisition, transformer production, transformer transportation, transformer use, and transformer recycling). It does not separately consider the carbon emission accounting issues of the 10kV distribution transformer production process, and cannot provide comprehensive and scientific methodological support for transformer manufacturers to formulate carbon reduction plans. This is not conducive to promoting carbon management and the formulation and implementation of carbon reduction actions by transformer manufacturers. Summary of the Invention

[0008] The purpose of this invention is to provide a carbon emission accounting method for the production process of 10kV distribution transformers. Following the principles and requirements of GB / T 24067, and specifically addressing the needs of greenhouse gas accounting in the transformer production process, this method comprises seven steps: defining the accounting scope, identifying production emissions, clarifying emission types, compiling an emission inventory, configuring calculation formulas, determining accounting data, and calculating production emissions. Applied to the carbon emission accounting of 10kV transformer production, this method can scientifically assess transformer production emissions, thereby promoting carbon management and the implementation of carbon reduction actions by transformer manufacturers.

[0009] The technical solution of this invention is: to provide a method for carbon emission accounting in the production process of 10kV distribution transformers, including the accounting of greenhouse gases during the transformer production process, characterized by:

[0010] The first step is to determine the boundary range for carbon emission accounting of 10kV transformers during the manufacturing stage, based on the 10kV transformer production process.

[0011] The second step is to analyze the energy-consuming equipment in each production process of 10kV transformer products, focusing on the scope of carbon emission accounting.

[0012] The third step is to identify the types of energy emissions from energy-consuming equipment;

[0013] The fourth step is to compile a carbon emission accounting list for the 10kV transformer production process according to emission types;

[0014] The fifth step is to configure the emission calculation formula for 10kV transformer production based on the carbon emission accounting list;

[0015] The sixth step is to determine the data requirements for relevant carbon activity data and emission factors by combining the emission calculation parameters;

[0016] The seventh step is to collect the necessary data for accounting based on the production process accounting method and calculate the carbon emissions of the 10kV transformer production process.

[0017] Specifically, the carbon emission accounting method for the production process of 10kV distribution transformers corresponds the 10kV transformer process flow and the emission sources of each process, solidifies the carbon emission calculation logic of the 10kV transformer production process, provides a reference and standardized method for carbon emission accounting for transformer manufacturers, and provides support for scientifically monitoring carbon emissions in the production process and formulating carbon emission reduction plans.

[0018] Specifically, in the first step, based on the actual production and operation of 10kV transformer enterprises, the boundary of carbon emission measurement is focused on the production process of 10kV transformer enterprises, and the greenhouse gas emissions generated in the production process are quantified and measured.

[0019] Specifically, in the second step, the production process of 10kV distribution transformers includes 10 emission stages: core making, coil winding, lead wire making, transformer body assembly, transformer body drying, final assembly, vacuum oil filling and static release, factory testing, production support, and public energy consumption.

[0020] The core manufacturing process includes automatic feeding of amorphous strip, automatic cutting of amorphous strip, winding of amorphous strip into / out of warehouse, automatic winding of amorphous core, cutting of single frame core, core forming and assembly, core heat treatment, core debris cleaning, core spraying, and core forming and curing.

[0021] Lead wire fabrication includes lead wire insulation and lead wire soldering;

[0022] Production support includes in-plant warehousing and transportation;

[0023] Production energy consumption includes energy consumption in the factory area and energy consumption in the office building.

[0024] Specifically, in the third step, the energy consumption of the transformer production process involves at least the energy consumption of machinery and equipment; the core manufacturing process includes turning equipment, AGV trolleys, automatic cutting equipment, gantry truss equipment, robotic arms, automatic winding equipment, single-sided truss for coil unloading, automatic forming / assembly equipment, heat treatment furnace, debris cleaning equipment, spraying robots, and tunnel curing furnace; the coil winding process involves high and low voltage integrated automatic winding machines; the lead wire manufacturing process involves lead wire wrapping tools, wire stripping machines, and crimping machines; the transformer body assembly process involves transformer body assembly tables; the transformer body drying process involves drying ovens; the final assembly process involves overhead cranes; the vacuum oil injection and static release process involves vacuum oil injection units and oil filters; the factory testing process involves comprehensive characteristic testing equipment and insulating oil testers; and the production support process involves overhead cranes, automated warehouses, AGVs, RGVs, forklifts, and traction equipment.

[0025] Specifically, in the fourth step, the accounting list formulation stage includes two parts: list formulation and data collection and analysis. The data sources mainly consist of electricity consumption data generated from routine processes, production support, and public energy consumption in production. Based on the carbon emission sources of the 10kV transformer, a carbon emission list is formed, and the relevant energy consumption data collection work is completed.

[0026] Furthermore, in step five, the carbon dioxide emissions generated from the purchase and use of electricity are calculated by multiplying the purchased and used electricity volume by the grid emission factor, using the following formula:

[0027] E 电 =AD 电 ×EF 电

[0028] In the formula: E 电 Carbon emissions generated from the use of electricity; AD 电 For the purchased electricity used; EF 电 For power grid emission factors;

[0029] The public carbon emission allocation coefficient is derived by using the ratio of the output value of 10kV transformer products to the total output value of the plant area during the accounting period, calculated using the following formula:

[0030] A = Q 变压器 / Q 总

[0031] In the formula: A is the public carbon emission sharing factor; Q 变压器 The output value of 10kV distribution transformers during the accounting period; Q 总 This represents the total output value of all products in the factory area during the accounting period.

[0032] The carbon emissions from the production of a 10kV distribution transformer are equal to the sum of the emissions generated by the electricity used by equipment in each business segment, calculated using the following formula:

[0033]

[0034] In the formula: E 总 The total carbon emissions from the production of 10kV distribution transformers; AD n EF represents the purchased electricity used by the nth device. 电 For grid emission factors; AD 生产公共 Purchased electricity used for public energy consumption; A is the public carbon emission allocation factor.

[0035] Furthermore, in the fifth step, based on the public energy consumption of the distribution transformer manufacturing enterprise's factory area, office and other places, in addition to the use of electricity, there are also energy consumption types such as oil and gas.

[0036] Transformer manufacturers need to calculate the corresponding emissions based on the oil and water consumption in their factory and office spaces, using the following formula:

[0037] E 其它 =(AD) 油 ×EF 油 +AD 水 ×EF 水 )×A

[0038] In the formula: E 其它 Carbon emissions from the production of other energy sources for public utilities in 10kV distribution transformers; AD 油 The amount of fuel used for public facilities within the factory area; AD 水 For the usage of public water supply in the factory area; EF 油 Fuel emission factor; EF 水 is the water emission factor; A is the public carbon emission allocation coefficient.

[0039] Specifically, in step six, the relevant carbon emission factors are obtained from the latest data released by authoritative institutions;

[0040] Among them, the electricity emission factor was selected from the "2023 Electricity Carbon Footprint Factor Data" released by the Ministry of Ecology and Environment of China;

[0041] The emission factors for diesel and water were selected from the data published in the "Guidelines for Greenhouse Gas Emission Accounting Methods and Reporting by Public Building Operating Enterprises (Trial)".

[0042] Specifically, in step seven, based on the carbon emission accounting list and calculation formula, each emission source listed in the accounting list is matched with the calculation formula, and then the carbon emissions of each emission source are added together to build a calculation model for the 10kV transformer production process, and the total carbon emissions of the 10kV transformer production process are calculated.

[0043] Compared with the prior art, the advantages of the present invention are:

[0044] 1. The technical solution of this invention, based on the steps of carbon emission accounting in the 10kV transformer production process, forms a carbon emission calculation model applicable to the 10kV transformer production process. By collecting, inputting, and calculating energy consumption data of production equipment during the 10kV transformer production process, it can be used to calculate the overall emission level of the transformer production process;

[0045] 2. The technical solution of this invention, based on the production emission calculation logic, and through use, improvement, and optimization of the calculation model, utilizes information technology to develop a transformer production auxiliary accounting tool. The tool defines the energy consumption data collection and application specifications, and binds energy consumption data and emission factors to the emission calculation logic for each process, enabling rapid calculation of emissions in the production process.

[0046] 3. The technical solution of this invention solidifies the emission calculation standards and data application specifications for each process in the production of 10kV transformers, which greatly improves the efficiency and accuracy of carbon emission accounting for transformer manufacturers. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the carbon emission accounting steps in the production process of the 10kV distribution transformer of this invention. Detailed Implementation

[0048] The invention will now be further described with reference to the accompanying drawings.

[0049] Currently, the methods for calculating carbon emissions in the production process of products like transformers are rather crude. Existing methods only make rough estimates by calculating the electricity consumption of the factory over a period of time. There are few methods that calculate the emissions by breaking down the production process into smaller steps, which is insufficient to fully and systematically understand the carbon emission composition of the 10kV transformer production process.

[0050] This patent provides an effective method for carbon emission accounting in the production process of 10kV transformers. Compared with existing methods, it can more systematically and comprehensively analyze the emissions, emission composition and energy efficiency of transformer manufacturers in the production process. It provides a reference for the accounting of greenhouse gas emissions in the production and manufacturing process of power equipment such as transformers, and thus formulates better energy management and carbon management solutions.

[0051] The specific accounting method includes the following steps:

[0052] First, based on the 10kV transformer production process, determine the boundary range for carbon emission accounting during the manufacturing stage of 10kV transformers;

[0053] Second, focusing on the scope of carbon emission accounting, we will analyze the energy-consuming equipment in each production process of 10kV transformer products.

[0054] Third, identify the types of energy emissions from energy-consuming equipment;

[0055] Fourth, compile a carbon emission accounting list for the 10kV transformer production process according to emission type;

[0056] Fifth, based on the carbon emission accounting list, configure the emission calculation formula for 10kV transformer production;

[0057] Sixth, based on emission calculation parameters, determine the data requirements for activity volume data, emission factors, etc.;

[0058] Seventh, based on the accounting methods for the production process, collect the data required for accounting and calculate the carbon emissions of the 10kV transformer production process.

[0059] The technical solution of this patent provides a standardized method for transformer manufacturers to calculate carbon emissions, and provides support for scientifically monitoring carbon emissions during the production process and formulating carbon reduction plans.

[0060] Specifically, the technical solution of this invention, in accordance with the principles and requirements of GB / T 24067, focuses solely on the needs of greenhouse gas accounting in the transformer production process. It designs an accounting method for the transformer production process in seven steps: defining the accounting scope, identifying production emissions, clarifying emission types, compiling an emission inventory, configuring calculation formulas, determining accounting data, and calculating production emissions. This method is applied to carbon emission accounting in the production process of 10kV transformers, enabling a scientific assessment of transformer production emissions and thereby promoting carbon management and the implementation of carbon reduction actions by transformer manufacturers.

[0061] See Figure 1 As shown, the specific accounting method is as follows:

[0062] (1) Determine the scope of accounting:

[0063] Based on the actual production and operation of 10kV transformer enterprises, the boundary of this carbon emission calculation is focused on the production process of 10kV transformer enterprises, and the greenhouse gas emissions generated in the production process are quantified and calculated.

[0064] (2) Identify carbon emission sources:

[0065] The production process of a 10kV distribution transformer includes 10 emission stages: core fabrication, coil winding, lead wire fabrication, transformer body assembly, transformer body drying, final assembly, vacuum oil filling and static storage, factory testing, production support, and public energy consumption.

[0066] The core manufacturing process includes automatic feeding of amorphous strip, automatic cutting of amorphous strip, winding of amorphous strip into / out of warehouse, automatic winding of amorphous core, cutting of single frame core, core forming and assembly, core heat treatment, core debris cleaning, core spraying, and core forming and curing.

[0067] Lead wire fabrication includes lead wire insulation and lead wire soldering;

[0068] Production support includes in-plant warehousing and transportation;

[0069] Production energy consumption includes energy consumption in the factory area and energy consumption in the office building.

[0070] The identified carbon emission sources primarily involve emissions from electricity consumption.

[0071] The specific carbon emission sources in the production process are shown in Table 1:

[0072] Table 1. Carbon Emission Sources in the Production Process of 110kV Distribution Transformers

[0073]

[0074]

[0075] (3) Identify emission types:

[0076] Energy consumption in transformer production mainly involves the energy used by machinery and equipment. Core fabrication includes equipment such as turning machines, AGVs, automatic cutting equipment, gantry cranes, robotic arms, automatic winding equipment, single-sided gantry cranes for coil unloading, automatic forming / assembly equipment, heat treatment furnaces, debris removal equipment, painting robots, and tunnel curing ovens. Coil winding involves integrated high and low voltage automatic winding machines. Lead wire fabrication involves lead wire wrapping tools, wire stripping machines, and crimping machines. Transformer body assembly involves body assembly tables. Transformer body drying involves drying ovens. Final assembly involves overhead cranes. Vacuum oil injection and settling involve vacuum oil injection units and oil filters. Factory testing involves comprehensive characteristic testing equipment and insulating oil testers. Production support involves overhead cranes, automated warehouses, AGVs, RGVs, forklifts, and traction equipment. Therefore, the energy emissions from the 10kV transformer production process are primarily indirect emissions.

[0077] Table 2. Energy Consumption Types of Carbon Emission Sources in the Production Process of 10kV Distribution Transformers

[0078]

[0079]

[0080] 4) Prepare an accounting list:

[0081] The accounting list development phase includes two parts: list development and data collection and analysis. Data sources primarily consist of electricity consumption data generated from routine processes, production support, and public energy consumption in production. Based on the carbon emission sources of the 10kV transformer, a carbon emission list is generated, and relevant energy consumption data collection is completed. The specific accounting list is shown in Table 2.

[0082] Table 3. Carbon Emission Accounting List for 10kV Distribution Transformer Production Process

[0083]

[0084]

[0085] (5) Configure the calculation formula

[0086] Carbon dioxide emissions from purchased and used electricity are calculated by multiplying the purchased and used electricity volume by the grid emission factor, using the following formula.

[0087] E 电 =AD 电 ×EF 电 (1)

[0088] In the formula: E 电 Carbon emissions generated from the use of electricity, expressed in tons (t);

[0089] AD 电 The purchased electricity used is expressed in megawatt-hours (MW·h).

[0090] EF 电 The power grid emission factor is expressed in tons of carbon dioxide per megawatt-hour (tCO2 / MW·h).

[0091] The public carbon emission allocation factor refers to the proportion of carbon emissions from energy consumption of public facilities in a factory area allocated to each product category within a certain period. This patent uses the ratio of the output value of 10kV transformer products to the total output value of the factory area during the accounting period, calculated using the following formula.

[0092] A = Q 变压器 / Q 总 (2)

[0093] In the formula: A is the public carbon emission sharing coefficient;

[0094] Q 变压器 The output value of 10kV distribution transformer products during the accounting period is expressed in ten thousand yuan.

[0095] Q 总 The total output value of all products in the factory area during the accounting period is expressed in ten thousand yuan.

[0096] Based on the actual operation of distribution transformer manufacturers, a carbon emission calculation formula applicable to transformer products is formulated. The carbon emission of the 10kV distribution transformer production process is equal to the sum of the emissions generated by the electricity used by the equipment in each business process. The following formula is used for calculation.

[0097]

[0098] In the formula: E 总 The total carbon emissions from the production of 10kV distribution transformers, expressed in tons (t).

[0099] AD n The purchased electricity used by the nth device, in kilowatt-hours (kWh);

[0100] EF 电 This refers to the power grid emission factor, expressed in kilograms of carbon dioxide per kilowatt-hour (kgCO2 / kWh).

[0101] AD 生产公共 Purchased electricity used for public energy consumption, expressed in kilowatt-hours (kWh).

[0102] A represents the public carbon emission sharing factor.

[0103] Based on the public energy consumption of distribution transformer manufacturers' factory areas, offices, and other locations, in addition to electricity, there are also energy consumption types such as oil and gas.

[0104] If some transformer manufacturers consume oil and water in their factory areas and office spaces, they also need to calculate the corresponding emissions using the following formula.

[0105] E 其它 =(AD) 油 ×EF 油 +AD 水 ×EF 水 )×A

[0106] In the formula: E 其它 Carbon emissions from the production of public supporting oil, water and other energy sources for 10kV distribution transformers, in tons (t);

[0107] AD 油 The amount of fuel used for public facilities in the factory area, in tons (t);

[0108] EF 油 These are fuel emission factors, such as gasoline and diesel, expressed in kilograms of carbon dioxide per ton (kgCO2 / t).

[0109] AD 水 The amount of water used for public facilities within the factory area, expressed in tons (t).

[0110] EF 水 is the water emission factor; A is the public carbon emission allocation coefficient.

[0111] (6) Determine the accounting parameters:

[0112] Carbon emission factors are greenhouse gas emissions generated by various energy unit activities. The relevant carbon emission factor data are taken from the latest data released by authoritative institutions. Electricity emission factors are selected from the "2023 Electricity Carbon Footprint Factor Data" released by the Ministry of Ecology and Environment of China, while emission factors such as diesel are selected from data released in the "Guidelines for Greenhouse Gas Emission Accounting Methods and Reporting of Public Building Operating Enterprises (Trial)". Table 3 shows the energy carbon emission factor parameters:

[0113] Table 3 Energy Carbon Emission Factor Parameters

[0114]

[0115] (7) Calculate carbon emissions:

[0116] Based on the carbon emission accounting list and calculation formula, each emission source listed in the accounting list is matched with the calculation formula, and then the carbon emissions of each emission source are added together to build a calculation model for the 10kV transformer production process, and calculate the total carbon emissions of the 10kV transformer production process.

[0117] Example:

[0118] Using the methods and steps described above, and based on the steps for carbon emission accounting in the 10kV transformer production process, a carbon emission calculation model applicable to the 10kV transformer production process is formed.

[0119] By collecting, inputting, and calculating energy consumption data of production equipment during the production process of 10kV transformers, the overall emission level of the transformer production process can be calculated.

[0120] By applying emission accounting methods in transformer production and based on the emission calculation logic, and through use, improvement, and optimization of the calculation model, an auxiliary accounting tool for transformer production was developed using information technology. This auxiliary accounting tool defines the standards for energy consumption data collection and application, and binds energy consumption data and emission factors to the emission calculation logic of each process, enabling rapid calculation of emissions in the production process.

[0121] The auxiliary tools have solidified the emission calculation standards and data application specifications for each process in the production of 10kV transformers, significantly improving the efficiency and accuracy of carbon emission accounting for transformer manufacturers.

[0122] The interface of the emission calculation tool for the 10kV distribution transformer production process is shown in Table 4:

[0123] Table 4. Carbon Emission Modeling Tool for 10kV Distribution Transformer Production Process

[0124]

[0125]

[0126] In this technical solution, the aforementioned spreadsheet is referred to as an auxiliary calculation tool.

[0127] The auxiliary calculation tool has solidified the emission calculation standards and data application specifications for the production process of 10kV distribution transformers, which has greatly improved the efficiency and accuracy of carbon emission accounting for distribution transformer manufacturers.

[0128] Since the calculation basis and formulas of this technical solution can be clearly obtained, the formula calculation function of Excel can be used to automatically obtain the required calculation results after inputting the relevant parameters.

[0129] In practical use, the technical solution of this invention combines the characteristics of current accounting standards and spreadsheet technology, giving priority to using the grid emission factor and the new transformer energy efficiency standard data with higher reliability as the calculation benchmark, while paying attention to the differences in emission characteristics of different production processes (such as dry / oil-immersed).

[0130] The following points should be noted during the implementation of this technical solution:

[0131] 1. Timely alignment with national standards:

[0132] The embedded product carbon footprint accounting module supports the automatic generation of carbon labeling data formats that meet the requirements of the "Product Carbon Footprint Management System" and is compatible with the differentiated labeling rules for products with different energy efficiency levels, such as dry-type (SCB18) and oil-immersed transformers.

[0133] 2. Dynamically correlated energy efficiency rating:

[0134] Establish a mapping relationship between transformer energy efficiency levels (such as SCB14 / SCB18 in the new GB20052-2024 standard) and carbon emission factors to achieve a quantitative assessment of the emission reduction effect of energy efficiency upgrades.

[0135] 3. Enhance data collaboration capabilities:

[0136] 3.1 Blockchain Evidence Storage Interface:

[0137] Develop a data interface module with the provincial carbon emission management platform, and use blockchain technology to realize real-time verification and storage of energy consumption data for key processes (such as energy consumption for iron core laser cutting and VOC emissions from insulation treatment).

[0138] 3.2 Dynamic updating of regional power grid factors:

[0139] It integrates the State Grid carbon emission factor database interface to automatically acquire and apply the latest regional power grid emission factors (such as 0.5703tCO2 / MWh in the 2025 standard).

[0140] 4. Strengthen production process control:

[0141] 1) Process path optimization analysis;

[0142] 2) Add differentiated accounting models for dry-type and oil-immersed transformers;

[0143] 3) Monitoring of energy consumption and VOC emissions during the curing of epoxy resin in dry-type transformers;

[0144] 4) For oil-immersed transformers, the focus is on tracking the carbon leakage risk during the production of insulating oil and the sealing test process;

[0145] 5) Equipment-level carbon tracking;

[0146] Smart meters are installed on key equipment such as stacking machines and vacuum impregnation equipment to achieve minute-level data collection and early warning of abnormal carbon emissions at the process level.

[0147] 5. Establish an industry collaboration mechanism:

[0148] 1) Supply chain data interoperability;

[0149] Develop a direct connection channel for supplier BOM data, and prioritize connecting with green and low-carbon certification information for core materials such as silicon steel sheets and electrolytic copper.

[0150] 2) Integrated carbon management at the park level;

[0151] Support the carbon assessment requirements of national-level pilot parks and produce special reports that comply with the "Guidelines for Carbon Emission Assessment of Fixed Asset Investment Projects".

[0152] We should pay close attention to the new requirements for enterprise-level accounting accuracy imposed by the dual carbon emission control system to be fully implemented in 2025, and recommend cross-validation with the National Greenhouse Gas Emission Factor Database (to be completed in 2025) every quarter.

[0153] In summary, the technical solution of this patent provides a method for carbon emission accounting in the 10kV transformer production process, proposes an auxiliary tool for emission accounting in the 10kV transformer production process, defines the carbon emission calculation logic and method, and clarifies the basic data requirements for emission accounting. By pre-setting emission calculation formulas and corresponding activity data, emission factors, and other calculation parameters in the tool, it automatically calculates and outputs the total carbon emissions of the 10kV transformer production process after inputting energy consumption data. This patent maps the 10kV transformer process flow and the emission sources of each process step, solidifies the carbon emission calculation logic of the 10kV transformer production process, and provides an accounting tool for transformer manufacturers to conduct carbon monitoring.

[0154] This invention can be widely used in the field of carbon emission accounting and control for power transformer manufacturing enterprises.

Claims

1. A 10kV distribution transformer production link carbon emission accounting method, comprising accounting for greenhouse gas emissions during transformer production process, characterized by: first, according to the production process of 10kV transformer, determine the boundary range of carbon emission accounting of 10kV transformer in manufacturing stage; second, around the carbon emission accounting range, comb the energy-using equipment of each production process of 10kV transformer product; third, identify the energy emission type of energy-using equipment; fourth, according to the emission type, prepare the carbon emission accounting list of 10kV transformer production link; fifth, according to the carbon emission accounting list, configure the carbon emission calculation formula of 10kV transformer production; sixth, combined with the emission calculation parameters, determine the data requirements of related carbon activity data and emission factors; seventh, based on the production link accounting method, collect the data required for accounting, and calculate the carbon emission of 10kV transformer production link. The 10kV distribution transformer production link carbon emission accounting method corresponds the 10kV transformer process flow and each process emission source, solidifies the 10kV transformer production link carbon emission calculation logic, provides a referenceable and standardized method for transformer production enterprise carbon emission accounting, and provides support for scientific monitoring of production process carbon emission and development of carbon emission reduction scheme.

3. The 10kV distribution transformer production link carbon emission accounting method according to claim 1, characterized in that in the first step, combined with the actual situation of 10kV transformer enterprise production and operation, the boundary of carbon emission calculation is focused on the production link of 10kV transformer enterprise, and the greenhouse gas emission generated in the production link is quantified and calculated. Characterized in that in the second step, the production process of 10kV distribution transformer includes core manufacturing, coil winding, lead manufacturing, body assembly, body drying, general assembly, vacuum oil injection and static placement, factory test, production matching and public energy consumption, totaling 10 emission links. Among them, Core manufacturing includes automatic feeding of amorphous strip, automatic cutting of amorphous strip, automatic winding of amorphous strip, automatic winding of amorphous core, single frame core cutting, core forming assembly, core heat treatment, core fragment cleaning, core spraying, core forming and curing; Lead manufacturing includes lead insulation wrapping and lead welding; Production matching includes in-plant warehousing and transportation; Production public energy consumption includes plant public energy consumption and office building public energy consumption.

2. The method for accounting the carbon emission of the 10 kV distribution transformer production link according to claim 1, characterized in that 5. The 10kV distribution transformer production link carbon emission accounting method according to claim 1, characterized in that in the third step, the transformer production process energy consumption at least involves machine equipment energy consumption; Core manufacturing link includes turnover equipment, AGV trolley, automatic cutting equipment, gantry truss equipment, mechanical hand, automatic winding equipment, material roll cutting single-sided truss, automatic forming equipment / assembly equipment, heat treatment furnace, fragment cleaning equipment, spraying robot, tunnel curing furnace; 4. The method of claim 1, wherein the 10 kV distribution transformer production link carbon accounting method, Coil winding link involves high and low voltage integrated automatic winding machine; Lead manufacturing link involves lead wrapping tool, wire stripping machine and pressure contact machine; Body assembly link involves body assembly table; Body drying link involves drying furnace; General assembly involves travelling crane; Vacuum oil injection and static placement link involves vacuum oil injection unit and oil filter. ​ ​ ​ ​ ​ ​ ​ ​ The factory test link involves comprehensive performance test equipment and insulating oil tester; The production supporting link involves overhead traveling crane, stereoscopic warehouse, AGV, RGV, overhead traveling crane, forklift and traction equipment.

6. The 10kV distribution transformer production link carbon emission accounting method according to claim 1, characterized in that in the fourth step, the accounting list development stage includes two parts of list development and data collection and analysis, and the data sources mainly include power consumption data generated in the conventional process, production supporting and production public energy consumption; According to the carbon emission sources of 10kV transformers, a carbon emission list is formed, and the work of collecting relevant energy consumption data is completed.

7. The 10kV distribution transformer production link carbon emission accounting method according to claim 1, characterized in that in the fifth step, for the carbon dioxide emissions generated by the purchased and used electricity, the following formula is used to calculate: E 电 = AD 电 x EF 电 where: E 电 is the carbon emissions from the use of electricity; AD 电 is the amount of purchased electricity used; EF 电 is the grid emission factor; The public carbon emission allocation coefficient is obtained by the ratio of the 10kV transformer product output value to the total output value of the factory area in the accounting period, and the following formula is used to calculate: A = Q 变压器 / Q 总 Where: A is the public carbon emission allocation coefficient; Q 变压器 is the 10kV distribution transformer product output value in the accounting period; Q 总 is the total product output value of all products in the factory area in the accounting period; The carbon emissions of 10kV distribution transformer production link are equal to the sum of the emissions generated by the power consumption of each business link equipment, and the following formula is used to calculate: In the formula: E 总 is the total carbon emissions of the 10 kV distribution transformer production link; AD n is the purchased electricity used by the nth equipment; EF 电 is the grid emission factor; AD 生产公共 is the purchased electricity used for public energy consumption; A is the public carbon emission allocation coefficient.

8. The 10kV distribution transformer production link carbon emission accounting method according to claim 1, characterized in that in the fifth step, according to the public energy consumption of the distribution transformer production enterprise factory area and office site, in addition to the use of electricity, there are also energy consumption types of oil and gas use; The transformer production manufacturer needs to calculate the corresponding emissions in the case of supporting oil and water consumption in the factory area and office space, and the following formula is used to calculate: E 其它 = (AD 油 × EF 油 + AD 水 × EF 水 ) × A In the formula: E 其它 AD is the carbon emission of other energy for the production of 10 kV distribution transformer; AD 油 AD is the use of fuel oil for public supporting in the factory area; AD 水 EF is the use of water for public supporting in the factory area; EF 油 EF is the fuel emission factor; EF 水 EF is the water emission factor; A is the public carbon emission allocation coefficient.

9. The 10kV distribution transformer production link carbon emission accounting method according to claim 1, characterized in that in the sixth step, the relevant carbon emission factors are taken from the latest data released by authoritative agencies; wherein, The power emission factor selects the "2023 Electric Power Carbon Footprint Factor Data" released by the State Department of Ecological Environment; The emission factors of diesel and water select the data released in "Greenhouse Gas Emission Accounting Method and Reporting Guide for Public Building Operation Enterprises (Trial)".

10. The 10kV distribution transformer production link carbon emission accounting method according to claim 1, characterized in that in the seventh step, based on the carbon emission accounting list and the calculation formula, each emission source listed in the accounting list is matched with the calculation formula, then the carbon emissions of each emission source are added, and a 10kV transformer production link calculation model is built to calculate the total carbon emissions of 10kV transformer production link.

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