Volume 59

Research on Coupled Energy-Carbon Accounting Modeling and Algorithms in Integrated Energy Systems Xiang Ge, Yujuan Fang, Zheng Li

Abstract

Integrated energy systems (IES) synergize electricity, gas, and heat networks to enhance renewable integration and utilization efficiency, where carbon emissions are intrinsically coupled with multi-energy flows. Precise carbon allocation mechanisms are critical for carbon-aware operations. This paper proposes a unified carbon emission flow (CEF) framework for IES, defining core physical quantities under conservation principles. Explicit CEF models are established for different energy networks. The energy hub formulation integrates these via coupling matrices to map carbon redistribution through converters. Based on the theoretical foundation, a CEF calculation procedure is demonstrated through an integrated electricity-gas-heat case study, to validate the effectiveness of the proposed method. This framework enables precise carbon accounting and decarbonization-oriented IES planning.

Keywords energy-carbon coupling, carbon emission flow, integrated energy system, energy hub, carbon flow modeling