Low-Carbon Optimization Scheduling of Integrated Energy Based on Offshore Wind Power Hydrogen Production and Onshore Ammonia-Blended Combustion

Under the promotion of the “dual carbon” policy, offshore wind power and other renewable energy sources have ushered in rapid development. As an innovative solution, offshore wind hydrogen production technology provides a new pathway for achieving low-carbon and efficient operation of offshore Integrated Energy Systems (IES). At the same time, ammonia, as an energy source with high energy density and good storage capabilities, can facilitate the low-carbon and efficient use of thermal power generation. With sufficient ammonia penetration into the integrated energy system, ammonia storage can be considered to coordinate the ammonia production process. However, the system’s ammonia usage usually requires hydrogen coordination for preparation, which poses a challenge to the operation of onshore integrated energy systems. To address this issue, this paper proposes a low-carbon optimization dispatch for integrated energy systems based on offshore wind hydrogen production and onshore ammonia synthesis. Firstly, by studying the operational mechanisms of offshore wind power and hydrogen technology and comprehensively considering the offshore system’s grid connection, an offshore wind hydrogen production system and its operation modes are established. Secondly, considering the large-scale hydrogen transport to onshore integrated energy systems, the hydrogen-to-ammonia conversion process and ammonia usage process are optimized. A technological framework is proposed for hydrogen-coordinated ammonia production, which also involves ammonia co-firing with thermal power units. Finally, with the objective of minimizing the total operational cost, the feasibility of the integrated energy system is verified through simulation analysis. The results show that the proposed model can effectively improve energy utilization efficiency, significantly reduce the economic cost of the system, and offer clear low-carbon economic benefits.