Optimal dispatch and impact analysis of power-heat-gas integrated energy systems considering carbon pricing schemes

초록

With the global shift toward carbon neutrality and the implementation of emissions trading systems, the interac tion between emission allowance allocation scheme and the operation of sector-coupled integrated energy systems becomes increasingly important. This paper develops a linearized optimal dispatch strategy for an power-heat-gas integrated energy systems with renewable energy that considers allocation schemes to evaluate the impact of car bon pricing on economic outcomes and emission decrease. The model analyzes how system marginal prices are determined under different allocation schemes and quantifies trade-offs between carbon and cost under various policy and market conditions. Sensitivity analyses are conducted considering advances in cross-sectoral technolo gies and various energy and carbon prices. The results show that, unless the dispatch approach is properly aligned with the allocation scheme, improvements in the efficiency of combined heat and power units beyond a certain point can unintentionally increase both indirect emissions and operating costs. Through case studies under di verse scenarios, the study provides practical recommendations for system operators, investors, and policymakers to support affordable and low-carbon energy transitions. The findings underscore the importance of well-designed emission allocation policies and cost-effective investment strategies in achieving climate and energy transition goals.

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