陈公达,程国辉,蔡汝金,邹祥波,朱旺,叶骥,秦士伟,唐顺,卢伟业
CHEN Gongda,CHENG Guohui,CAI Rujin,ZOU Xiangbo,ZHU Wang,YE Ji,QIN Shiwei,TANG Shun,LU Weiye

• 1:广东能源集团科学技术研究院有限公司
• 2:珠海经济特区广珠发电有限责任公司
• 3:广东省能源集团有限公司
• 4:广东省特种设备检测研究院顺德检测院

摘要(Abstract)：

烟气端碳计量技术近年来逐渐受瞩目，然而由于国内相关技术标准和体系尚待完善，该技术尚未在发电行业的正式推广应用，尤其在CO_2监测数据补缺方面鲜有研究。探讨了CO_2监测数据缺失时的有效补缺方法，在CO_2浓度方面上对比了保持缺失段前最后有效值、基于缺省值与中位修正值的氧气换算三种补缺方法，在长周期碳排放量方面进一步增加对比了取180 h内最大碳排放速率的补缺方法。研究结果显示，两机组烟气实际燃料燃烧的最大CO_2体积分数在不同负荷率条件时不是固定值，且分布规律也各不同。燃煤机组的反演算最大CO_2体积分数散布上下限差异约4%,在负荷率方向上总体变化小，整体反演算数据的中位值18.67%,与缺省值相差小，仅0.03%。燃气机组的反演算最大CO_2体积分数在负荷率方向上变化存在两段显著差异，20%负荷率以下时，随负荷率上升而逐渐上升，20%负荷率以上时，随负荷率上升基本稳定，整体反演算数据的中位值11.38%,与缺省值差0.12%。在长周期考察中，用修正方法补缺后数据最接近于正常数据，1个月内造成的碳排放量偏差均控制在1.5 t以内，从数据准确性角度看，该补缺方法有高适用性。此外，采用取180 h最大值补缺的方法，虽可作为碳数据管理部门对企业的一种有效惩罚性管理手段，但长远来看，随着烟气监测法在火电行业的广泛推广，该方法可能会导致我国在国际层面的碳相关事务谈判或交易中我国火电行业的碳排放总量被高估。
In recent years, carbon measurement technology for flue gases has garnered increased attention. Nevertheless, due to the lack of comprehensive technical standards and systems in China, its formal implementation in the power generation industry remains limited, particularly concerning CO_2 monitoring data gaps. Effective methods for addressing CO_2 data gaps were investigated and three approaches were compared including retaining the last valid value before the gap, data conversion using oxygen based on default and median correction values, and utilizing the maximum carbon emission rate within the past 180 hours during long-term evaluations. The findings indicate that the maximum CO_2 volumetric fraction in actual fuel combustion varies under different load conditions, with distinct distribution patterns. For coal-fired units, the variability in the maximum CO_2 volumetric fraction is approximately 4%, with a median value of 18.67% that closely aligns with the default value. In contrast, for gas-fired units, the maximum CO_2 volumetric fraction exhibits two notable stages of variation, with a median value of 11.38%, differing by 0.12% from the default. Long-term evaluations show that the corrected method yields data most comparable to normal conditions, with monthly carbon emission deviations controlled within 1.5 tons, demonstrating high accuracy and applicability. However, while the 180-hour maximum value method can serve as an effective punitive management tool for carbon data, its widespread adoption may lead to overestimation of carbon emissions in international negotiations or transactions as flue gas monitoring becomes more prevalent in the coal-fired power sector.

关键词(KeyWords)： 碳计量;碳监测;火力发电;烟气;数据补缺
carbon measurement;CO_2 monitoring;thermal power;flue gas;data gaps imputation

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划资助项目(2021YFF0601001);; 广东省能源局广东省新型电力系统技术创新资助项目(1688950422168)

作者(Author): 陈公达,程国辉,蔡汝金,邹祥波,朱旺,叶骥,秦士伟,唐顺,卢伟业
CHEN Gongda,CHENG Guohui,CAI Rujin,ZOU Xiangbo,ZHU Wang,YE Ji,QIN Shiwei,TANG Shun,LU Weiye

DOI: 10.13226/j.issn.1006-6772.LC24041001

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