While proposing dual carbon strategy goals, research on carbon reduction in integrated energy systems (IESs) has become a focus of attention. Traditional IES carbon emission flow is mostly based on energy flow, without considering the differences in energy quality. Exergy can be used as a reasonable measure of energy quality. Combining the theory of exergy flow and carbon emission flow, a modeling and analysis method for IES carbon emission flow considering energy quality is proposed. First, exergy flow models for electric and natural gas systems, equivalent exergy flow models for heat systems, and exergy hub models are introduced. Afterward, the exergy branch losses are allocated to the nodes at both ends. A networked modeling method for the carbon emission flow of energy stations is proposed. A unified matrix calculation model for IES carbon emission flow considering energy quality is established. On this basis, an IES carbon emission flow calculation method considering energy quality is proposed. Finally, this method is applied to the test IES, and the results show that the carbon emission flow calculation results reflect the distribution of carbon emissions borne by the effective energy supplied by the source and consumed by the load in the system, taking into account both the quantity and quality of energy. The reasonable allocation of new energy is conducive to synchronously improving the energy efficiency, exergy efficiency, and cleanliness of the system.

中文翻译：

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考虑能源质量的综合能源系统碳排放流建模与分析方法

在提出双碳战略目标的同时，综合能源系统（IES）减碳研究成为人们关注的焦点。传统IES碳排放流量大多基于能源流量，没有考虑能源质量的差异。火用可以作为能源质量的合理衡量标准。结合火用流和碳排放流理论，提出了考虑能源质量的IES碳排放流建模与分析方法。首先，介绍电力和天然气系统的㶲流模型、热系统的等效㶲流模型和㶲枢纽模型。然后，将火用支路损耗分配给两端的节点。提出了一种能源站碳排放流网络化建模方法。建立了考虑能源质量的IES碳排放流量统一矩阵计算模型。在此基础上，提出了考虑能源质量的IES碳排放流量计算方法。最后将该方法应用于测试IES，结果表明，碳排放流量计算结果反映了系统中源提供的有效能量和负载消耗的有效能量所承担的碳排放的分布，同时考虑了两者能量的数量和质量。新能源的合理配置有利于同步提高系统的能源效率、火用效率和清洁度。