长江三角洲（长三角）地区是我国经济发展最活跃、开放程度最高、创新能力最强的区域之一。进一步推进长三角地区能源革命，构建清洁低碳、安全高效的能源体系，促进长三角地区经济、能源和生态环境的协调发展，对推动“长江三角洲区域一体化发展”国家战略具有重要意义。本文结合长三角地区特点，提出建设长三角现代化能源大系统的构思，深入阐述了该系统的主要特征、关键问题和总体集成等，并通过模型计算和定性分析预测了现代化能源大系统建设对长三角地区发展带来的经济效益、环境效益和社会效益。最后，从成立长三角区域内统一的能源领导机构，打造长三角能源一体化先行示范区；深化能源体制改革，培育能源市场；实施“互联网+”智慧能源发展战略，开展能源高质量发展；加大投入，设立长三角能源科技创投基金等方面提出了构建长三角现代化能源大系统的对策建议。

The Yangtze River Delta is one of the most economically active, open, and innovative regions in China. Further promoting energy revolution, and building a clean, low-carbon, safe, and efficient energy system to promote the coordinated development of the economy, energy, and ecological environment in the Yangtze River Delta is significant to the national strategy of “Integrated Regional Development of the Yangtze River Delta.” This study proposes the idea of building a modern energy system in the Yangtze River Delta based on the local characteristics. The main features, key issues, and overall integration of the system are further discussed. Meanwhile, the economic, environmental, and social benefits brought by the modern energy system to the Yangtze River Delta are predicted. Furthermore, we propose that a unified energy leading agency should be established to build a demonstration area for energy integration; energy system reforms should be deepened to cultivate the energy market; the Internet Plus Smart Energy strategy should be implemented to promote high-quality energy development; and energy technology venture capital funds should be established.