CN-122022116-A - Component-level carbon footprint rapid accounting and aggregation method for photovoltaic power station

CN122022116ACN 122022116 ACN122022116 ACN 122022116ACN-122022116-A

Abstract

The invention relates to a rapid component-level carbon footprint accounting and aggregation method for a photovoltaic power station, which comprises the steps of constructing a component-level carbon footprint template library based on life cycle evaluation data and industry reference factors, obtaining a device bill, performing standardized processing, matching the standardized device bill with the component-level carbon footprint template library to obtain a single component carbon footprint reference value, calculating a component-level total carbon footprint reference value, establishing a component-to-string/branch, square matrix, bus box, inversion unit, boosting unit and power station hierarchical mapping relation to obtain a hierarchical mapping table, calculating the unit electric quantity carbon footprint of each level by combining component-level or string/branch, square matrix power generation data, component or square matrix total carbon footprint reference value, obtaining a carbon footprint result table, performing multi-level and multi-power station carbon footprint aggregation based on the hierarchical mapping table and the carbon footprint result table, and outputting a result. The invention can realize the carbon footprint management of the photovoltaic power station with refinement and high efficiency.

Inventors

YIN YANGSONG
HU CHAO
TANG ZHIJUN
WEN YAN
HUANG JINGJING
CHEN KAI
WANG XIANGWEI
YANG MEI
ZONG HUI
XIAO TAO
CHEN RUI
QIAN WENLI
ZHU DALIN

Assignees

大唐四川能源营销有限公司

Dates

Publication Date: 20260512
Application Date: 20251218

Claims (10)

1. A component-level carbon footprint rapid accounting and aggregation method for a photovoltaic power station is characterized by taking a photovoltaic component as a minimum accounting unit and comprising the following steps: Step S1, constructing a component-level carbon footprint template library based on life cycle evaluation data and industry reference factors; s2, acquiring an equipment bill of materials from a design drawing, a material purchasing system, an asset ledger and an SCADA system, and performing standardized processing; step S3, matching the standardized equipment list with a component-level carbon footprint template library to obtain a single-piece component carbon footprint reference value, and calculating a component-level total carbon footprint reference value; Step S4, establishing a hierarchical mapping relation from the components to the strings/branches, the square matrix, the combiner box, the inversion unit, the boosting unit and the power station to obtain a hierarchical mapping table; step S5, calculating the carbon footprint of the unit electric quantity of each level by combining the component level string/branch, the square matrix level generating capacity data and the total carbon footprint reference value of the component or the square matrix, and obtaining a carbon footprint result table; and S6, carrying out multi-level and multi-power-station carbon footprint aggregation based on the level mapping table and the carbon footprint result table, and outputting a result.
2. The photovoltaic power plant-oriented component-level carbon footprint rapid accounting and aggregation method of claim 1, further comprising: And S7, when the photovoltaic power station generates component replacement or capacity expansion, the updated equipment bill of materials is subjected to standardization and template matching again so as to realize dynamic update of the carbon footprint result.
3. The rapid component-level carbon footprint accounting and aggregation method for photovoltaic power plants according to claim 1 or 2, wherein the step S1 comprises: S11, acquiring or calculating life cycle carbon footprint data of a typical photovoltaic module according to the existing life cycle evaluation standard and research results, wherein the life cycle carbon footprint data at least comprises carbon emission in the stages of silicon chip preparation, module packaging, transportation, installation, operation maintenance and retirement treatment; And S12, establishing a template index according to the information of the manufacturer, model, rated power, production place and production year of the components, and generating a corresponding carbon footprint template record for each component, wherein the record comprises the life cycle carbon emission of each component and the carbon footprint factor converted to unit installed power.
4. The rapid component-level carbon footprint accounting and aggregation method for a photovoltaic power plant according to claim 3, wherein the step S1 further comprises: and S13, optionally incorporating the inverter, the bracket and the cable key equipment into a template library to expand the accounting range to the key equipment, wherein the key equipment template is used for optional expansion.
5. The rapid component-level carbon footprint accounting and aggregation method for photovoltaic power plants according to claim 1 or 2, wherein the step S2 comprises: s21, a device bill of materials is derived from a design document, an asset account or a purchasing system of the photovoltaic power station, and model, quantity and installation position information of each component and key devices are covered; And S22, carrying out coding unification and format standardization on material information from different sources, mapping the equipment model number and manufacturer name fields with index fields in a template library one by one, complementing the missing fields according to a preset rule, executing consistency check and judging according to a preset priority when the multi-source data have conflict, forming a standardized equipment list and outputting check records.
6. The rapid component-level carbon footprint accounting and aggregation method for photovoltaic power plants according to claim 1 or 2, wherein the step S3 comprises: s31, matching the component model in the standardized equipment list with a component-level carbon footprint template library, and directly acquiring a carbon footprint reference value of a corresponding component if a corresponding template exists; S32, if the model of the component does not exist in the template library, hard constraint screening and similarity scoring sorting are carried out on candidate templates according to a preset similarity rule, and a substitute template with the highest score and not lower than a threshold value is selected; S33, multiplying the number of the components by a single-piece component carbon footprint reference value to obtain a total carbon footprint reference value of a component level, wherein a specific calculation formula is as follows: ; Wherein, C i is a single component carbon footprint reference value, kgCO 2 e/block, N i is the number of components in units of blocks; for any upper object g, the total carbon footprint reference value calculation formula is: ; Wherein C sub is the total carbon footprint reference value of the lower level object.
7. The rapid component-level carbon footprint accounting and aggregation method for photovoltaic power plants according to claim 1 or 2, wherein the step S4 comprises: S41, acquiring the hierarchical relationship between the component and the whole of the power station, namely the serial/branch, the square matrix, the combiner box, the inversion unit, the boosting unit and the power station based on the design data of the power station or the SCADA system configuration; S42, constructing a hierarchy mapping table for carbon footprint aggregation based on a hierarchy relation, wherein the hierarchy mapping table comprises component ID, belonging string/branch ID, belonging square matrix ID, belonging bus box ID, belonging inversion unit ID, belonging boosting unit ID and power station ID fields; And S43, distributing unified codes for each level of objects, and providing an identification basis for subsequent cross-power station and cross-region aggregation.
8. The rapid component-level carbon footprint accounting and aggregation method for photovoltaic power plants according to claim 1 or 2, wherein the step S5 comprises: S51, acquiring generating capacity data of a component level or a square matrix level, or carrying out hierarchical allocation based on power station measurement data to obtain an electric quantity value in a corresponding period; S52, according to the selected conversion caliber, converting the total carbon footprint reference value of the component or the square matrix and the corresponding power generation amount to obtain a carbon footprint value of the unit electric quantity, and recording caliber types, evaluation period start-stop time and service life/attenuation key parameters in a carbon footprint result table; and S53, summarizing all the level objects of the power station to obtain unit electric quantity carbon footprints of the square matrix level, the power station level, the company level and the regional level.
9. The rapid component-level carbon footprint accounting and aggregation method for photovoltaic power plants according to claim 1 or 2, characterized in that the step S6 comprises: S61, according to the dimension selected by the user, calling a hierarchy mapping table and a carbon footprint result table, and executing aggregation operation; S62, generating a report and a data interface for internal management, external disclosure or green electricity transaction, wherein the report and the data interface comprise carbon footprint statistics values, unit electric quantity carbon footprints and comparison analysis results of all levels; and S63, butting the aggregation result with an external system for sharing and applying the carbon footprint information.
10. The rapid component-level carbon footprint accounting and aggregation method for a photovoltaic power plant according to claim 2, wherein the step S7 comprises: s71, when the photovoltaic power station generates component replacement, capacity expansion or key equipment update, updating a power station equipment bill of materials and re-executing a template matching step; S72, calculating an incremental carbon footprint and corresponding incremental power generation amount caused by the newly added component or the replaced component to obtain a carbon footprint change value of the unit incremental power generation amount; And S73, dynamically adjusting the carbon footprint result of the subsequent period on the premise of keeping traceability of the historical accounting result, and carrying out association records on the template library version, the equipment list version, the hierarchy mapping table version and the result version so as to support audit, rechecking and segment comparison.

Description

Component-level carbon footprint rapid accounting and aggregation method for photovoltaic power station Technical Field The invention belongs to the technical field of carbon footprint accounting, and particularly relates to a component-level carbon footprint rapid accounting and aggregation method for a photovoltaic power station. Background With the advancement of "two carbon" targets, the carbon footprint accounting of clean energy electricity has become a key measure of its environmental benefits. Photovoltaic power plants are important clean energy sources, and the accuracy and efficiency of carbon footprint accounting are critical to the sustainable development of the industry. In recent years, the photovoltaic technology is subjected to iterative upgrading from monocrystalline silicon to polycrystalline silicon to thin film technology, so that the power generation efficiency is remarkably improved, the cost is continuously reduced, and the rapid increase of the global photovoltaic installed capacity is promoted. Under the background, how to accurately and efficiently calculate the carbon footprint of the full life cycle of the photovoltaic power station becomes a focus of industry attention and is also an important ring for promoting the green transformation of clean energy power. Existing photovoltaic power plant carbon footprint accounting generally has the following problems: (1) The accounting granularity is coarse, namely accounting is carried out by taking the whole power station or the unit of the project, and the fine granularity objects such as components, square matrixes and the like are difficult to be accurate, so that the fine support is lacking in equipment replacement, technical improvement evaluation and regional alignment; (2) The traditional method often carries out life cycle assessment on each project independently, needs a large amount of basic data and professionals, lacks a reusable parameter library and template library, and is difficult to meet the requirements of multi-power station and large-scale quick accounting; (3) The method lacks unified standards and aggregation mechanisms, namely equipment parameter formats of different projects and different manufacturers are different, and the carbon footprint calculation method and boundary selection are not uniform, so that the results are incomparable, and the method is not beneficial to carrying out unified summarization and benchmarking analysis on a group level. Therefore, a method is needed to realize rapid accounting and multi-level aggregation of the carbon footprint of the photovoltaic power station at the component level, and has both precision and engineering floor-standing performance and large-scale application capability. Disclosure of Invention The invention aims to provide a component-level carbon footprint rapid accounting and aggregation method for a photovoltaic power station, which is based on a component-level carbon footprint template library, supports multi-level multi-dimensional aggregation by using an equipment bill automatic matching method, and can realize rapid update along with equipment replacement, thereby achieving the purpose of achieving the photovoltaic power station carbon footprint management with both refinement and high efficiency. The invention provides a component-level carbon footprint rapid accounting and aggregation method for a photovoltaic power station, which takes a photovoltaic component as a minimum accounting unit and comprises the following steps: Step S1, constructing a component-level carbon footprint template library based on life cycle evaluation data and industry reference factors; s2, acquiring an equipment bill of materials from a design drawing, a material purchasing system, an asset ledger and an SCADA system, and performing standardized processing; step S3, matching the standardized equipment list with a component-level carbon footprint template library to obtain a single-piece component carbon footprint reference value, and calculating a component-level total carbon footprint reference value; Step S4, establishing a hierarchical mapping relation from the component to the string/branch (optional), the square matrix, the combiner box, the inversion unit, the boosting unit and the power station to obtain a hierarchical mapping table; step S5, calculating the carbon footprint of the unit electric quantity of each level by combining the component level or the string/branch (optional), the square matrix level generating capacity data and the total carbon footprint reference value of the component or the square matrix, and obtaining a carbon footprint result table; and S6, carrying out multi-level and multi-power-station carbon footprint aggregation based on the level mapping table and the carbon footprint result table, and outputting a result. Further, the method further comprises: And S7, when the photovoltaic power station generates component replacement or capacity expa