A distributed dispatch approach for district-level electric-heat-gas integrated energy systems considering carbon emission and green certificate trading

Abstract

With a particular focus on enhancing energy consumption efficiency and addressing the challenge of low-carbon energy supply, this paper proposes a distributed dispatch approach for a district-level electric-heat-gas integrated energy system, incorporating an integrated mechanism for trading carbon credits and green certificates. A hierarchical dispatch framework is constructed, dividing the system into distribution networks and multi-energy microgrids, which addresses the limitations of existing centralized approaches by ensuring privacy and autonomy for different operators. On the distribution network side, a stepped carbon emission trading is considered, prioritizing both economic feasibility and carbon neutrality. On the side of multi-energy micro-networks, both carbon and green certificate trading are considered. Each micro-network adjusts its own dispatch approach to achieve maximum benefits. Then, through carbon quotas and renewable energy quotas, the low-carbon objective is converted into the system cost, which becomes part of the total cost. Finally, the interaction power at the interface connecting the upper and lower tiers serves as the coupling variable, which is decoupled and solved by the analysis target cascade. The dispatch approach is verified through simulations on an integrated heating and cooling network based on the IEEE 33-node distribution grid and 20-bus natural gas grid, demonstrating its effectiveness in achieving both economic and low-carbon objectives.