随着全球能源结构的转型和“双碳”目标的提出，绿氢作为一种清洁能源在石油炼化产业中的应用日益受到重视。本研究系统评估了基于海上风电的绿氢、甲醇及合成氨生产的技术路径与经济性。通过详细计算不同电力成本下的制氢、甲醇合成和氨合成成本，分析了电力价格对绿氢及其衍生物经济性的影响。结果表明，1kW·h电的成本为0.35元，当前碱性电解制氢技术在海上风电陆上制氢场景下的制氢成本为24.66元/kg，甲醇和合成氨的生产成本分别为5457.55元/t和4999.42元/t。电力成本是影响经济性的核心因素，降低可再生能源电力成本和提升电解效率是提升绿氢及其衍生物竞争力的关键。最后，文章提出了政策、技术和产业协同发展的建议，以推动绿氢及其衍生物的产业化推广。

As the global energy structure transforms and the “dual-carbon” goals are set， green hydrogen is gaining importance as a clean energy source in the petroleum refining industry. This study comprehensively assesses the technical and economic viability of producing green hydrogen， methanol， and ammonia using offshore wind power. By calculating the costs of hydrogen production， methanol synthesis， and ammonia synthesis under varying electricity costs， the study analyzes how electricity prices affect the economic viability of green hydrogen and its derivatives. The results indicate that when the electricity cost is 0.35 yuan per unit， the current alkaline electrolysis hydrogen production technology yields a hydrogen cost of 24.66 yuan/kg in the scenario of offshore wind power and onshore hydrogen production， with methanol and ammonia production costs of 5457.55 yuan/ton and 4999.43 yuan/ton， respectively. The study emphasizes that electricity cost is the key factor influencing economic viability. Reducing renewable energy electricity costs and enhancing electrolysis efficiency are crucial for boosting the competitiveness of green hydrogen and its derivatives. Finally， the article proposes suggestions for the coordinated development of policies， technologies， and industries to promote the industrialization of green hydrogen and its derivatives.