CN-121981400-A - Quantitative accounting and evaluation method for full life cycle carbon footprint of power transmission and transformation station

Abstract

The invention discloses a quantitative accounting and evaluating method for full life cycle carbon footprint of a power transmission and transformation station, and belongs to the technical field of power engineering construction and carbon emission evaluation. Aiming at the problems of non-uniform boundaries, insufficient data granularity and insufficient difference of emission factor areas in the existing accounting method, the invention collects the unit activity level data of energy flow and material flow by constructing a multi-level engineering structure from project to process, calculates the carbon emission respectively by adopting the emission factors selected in a grading way, performs boundary optimization and rejection on the low-contribution accounting unit based on the significance threshold and the critical emission ratio, and finally outputs the optimized carbon footprint accounting and decomposition result. The method realizes high-precision and quantifiable evaluation of the carbon footprint of the power transmission and transformation station in the construction stage, and provides basis for green low-carbon design, construction management and emission reduction responsibility decomposition.

Inventors

• ZHOU YAN
• ZHANG ZHE
• Bai Shiyun
• LIU KAIYUN
• Tan Runpi
• JIA SHUTING
• JIN CHENGWEN
• LIU YANGHAO
• XU MENGYAO
• LI JIASHU
• WANG GUOXUAN
• YIN CHANGHUA
• WU SEN
• LI HONGWEI
• HAN DONGFENG
• SHI CHUAN
• CHENG ZHEPENG
• Ruan Jiangchao

Assignees

• 国网山西省电力有限公司建设分公司
• 华北电力大学

Dates

Publication Date

20260505

Application Date

20260210

Claims (10)

1. 1. The quantitative accounting and evaluation method for the full life cycle carbon footprint of the power transmission and transformation station is characterized by comprising the following steps of: Constructing a multi-level engineering structure covering projects, sub-projects and working procedures; collecting energy flow activity level data and material flow activity level data corresponding to each link in the multi-level engineering structure; Calculating an energy flow carbon emission based on the energy flow activity level data and a corresponding emission factor; calculating a substance flow carbon emission based on the substance flow activity level data and a corresponding emission factor; Summarizing the energy stream carbon emissions with the material stream carbon emissions to obtain an overall carbon footprint; According to the significance threshold value and the critical emission ratio, carrying out boundary optimization on the accounting unit with the contribution degree lower than the significance threshold value; And outputting the carbon footprint accounting result after boundary optimization.
2. 2. The method of claim 1, wherein the step of determining the position of the substrate comprises, The process of constructing the multi-level engineering structure comprises the following steps: taking the sub engineering or procedure as a basic unit for carbon footprint accounting; And gradually aggregating the basic units according to the subordinate relations to form a sub-engineering, a sub-engineering and an engineering structure of an item level.
3. 3. The method of claim 2, wherein the step of determining the position of the substrate comprises, The process of collecting energy flow activity level data includes: collecting fuel consumption data of construction machinery, power consumption data of construction sites and traffic fuel consumption data in the material transportation process; and distributing the fuel consumption data, the electric power consumption data and the traffic fuel consumption data to the corresponding basic units.
4. 4. The method of claim 3, wherein the step of, The process of collecting material flow activity level data includes: classifying construction consumables into cement and products, steels, brick and tile sand stones, nonferrous metals, oil chemicals, turnover consumables, rubber plastic products and other materials according to engineering data; And collecting actual usage data of various materials, and distributing the actual usage data to the corresponding basic units.
5. 5. The method of claim 1, wherein the step of determining the position of the substrate comprises, In the process of calculating the carbon emission of the energy flow and the carbon emission of the substance flow, the process of selecting the emission factor comprises the following steps: Preferably employing a specific vendor-provided emission factor or zone-specific emission factor corresponding to the data source; in the absence of the vendor provided emission factor or regional specific emission factor, employing an emission factor in a national or regional emission factor library; For the mixed materials, the equivalent emission factor is calculated by weighting according to the component proportion thereof.
6. 6. The method of claim 1, wherein the step of determining the position of the substrate comprises, The process for performing boundary optimization comprises the following steps: calculating the proportion of the carbon emission of each accounting unit to the total carbon footprint; identifying an accounting unit in which the proportion is below the significance threshold; the identified units are eliminated from the accounting boundary under the premise of ensuring that the proportion of the accumulated carbon emissions of all the identified units to the overall carbon footprint does not exceed the critical emission ratio.
7. 7. The method of claim 6, wherein the step of providing the first layer comprises, The process of performing boundary optimization further comprises: sequencing all accounting units according to the carbon emission amount from large to small; And sequentially executing the identification and rejection operations on the accounting units in the sequence.
8. 8. The method of claim 1, wherein the step of determining the position of the substrate comprises, The process of outputting the carbon footprint accounting result comprises the following steps: Outputting carbon emission of each level in the multi-level engineering structure and the ratio relation of the carbon emission to each level; Outputting a high-contribution accounting unit list identified after boundary optimization; And outputting an emission reduction scenario analysis result in the case of adopting regenerated materials or alternative fuels.
9. 9. A computer terminal device, comprising: One or more processors; A memory coupled to the processor for storing one or more programs; When executed by the one or more processors, causes the one or more processors to implement the steps of the method of any of claims 1-8.
10. 10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method according to any of claims 1-8.

Description

Quantitative accounting and evaluation method for full life cycle carbon footprint of power transmission and transformation station Technical Field The invention belongs to the technical field of power engineering construction and carbon emission evaluation, and particularly relates to a quantitative accounting and evaluation method for full life cycle carbon footprint of a power transmission and transformation station. Background Under the background of a double-carbon target and the construction of a novel power system, the greenhouse gas emission in the construction stage of a power transmission and transformation project becomes one of the key emission sources in the field of power infrastructure. At present, quantitative research on engineering construction carbon emission at home and abroad has been advanced to a certain extent, and mainly focuses on the fields of coal electricity, power grid operation, building operation and maintenance, infrastructure fields such as roads, railways and the like, and the work lays a foundation for engineering low-carbon implementation. However, full life cycle systematic carbon footprint research from pre-preparation, civil construction, equipment installation and commissioning to commissioning handover, which is specifically directed to power transmission and transformation station construction, is still relatively weak. The existing research is mostly based on a greenhouse gas accounting system framework, and the case analysis is carried out on the energy consumption and the material consumption from the dimensions of product transportation, construction engineering, installation engineering and the like, so that the key materials such as cement, steel and the like are primarily revealed to be the main factors for driving carbon emission. Nevertheless, the prior art still faces significant limitations in the popularization and application of engineering practices. Firstly, the lack of a unified and standardized carbon footprint calculation model and a data processing method which can be directly embedded into a construction management flow of a power transmission and transformation station leads to difficulty in effective transverse comparison and integration application due to accounting caliber and model differences of research results of different projects or different areas. Secondly, in actual engineering accounting, due to the fact that data acquisition cost and calculation complexity are limited, unified material carbon emission factors are often adopted in regions and even nationwide, and objective differences of different regions in terms of building material production structures, energy structures and energy utilization efficiency cannot be reflected in the averaging treatment mode, so that an accounting result may deviate from a real emission level, and accuracy of evaluation is affected. Finally, in a complex power transmission and transformation station construction process, the determination of the carbon emission accounting boundary depends on engineering experience, and a set of systematic boundary optimization mechanism based on a scientific threshold and accumulated emission constraint is lacked, so that the problems of carbon leakage or repeated metering are easily caused by improper boundary definition, the working cost of data acquisition and calculation is greatly increased due to the need of processing a large amount of low contribution degree data, and the practical application of a carbon footprint accounting method in normal engineering management is restricted. Therefore, development of a carbon footprint accounting and evaluating method with both precision and operability is needed to overcome the above-mentioned drawbacks and effectively support the green low-carbon transformation in the field of electric power construction. Disclosure of Invention In order to solve the technical problems, the invention provides a quantitative calculation and evaluation method for the full life cycle carbon footprint of a power transmission and transformation station, which aims to solve the problems in the prior art. In order to achieve the above object, the present invention provides a method for quantitatively calculating and evaluating the carbon footprint of the whole life cycle of a power transmission and transformation station, comprising the following steps: Constructing a multi-level engineering structure covering projects, sub-projects and working procedures; collecting energy flow activity level data and material flow activity level data corresponding to each link in the multi-level engineering structure; Calculating an energy flow carbon emission based on the energy flow activity level data and a corresponding emission factor; calculating a substance flow carbon emission based on the substance flow activity level data and a corresponding emission factor; Summarizing the energy stream carbon emissions with the material stream carbon emission