能源互联网环境下交直流混合配电系统关键技术

交直流混合配电系统具备供电可靠性高、电能质量优质、运行控制高效、分布式电源及多元负荷灵活接入等特性，成为以电为核心的能源互联网的物理基础。在介绍交直流混合配电网在能源互联网中的主要应用特点基础上，分析了直流配电技术典型应用场景及其主要技术特点。结合目前交直流混合配电网的研究现状及能源互联网发展要求，从规划设计、关键设备、保护策略和运行控制等方面提出交直流混合配电网系统的技术需求及重点研究方向。相关研究成果对于构建交直流混合配电网发展技术框架具有重要意义。

Research on the Key Technologies of AC/DC Hybrid Distribution Networks Based on Energy Internet

The AC/DC hybrid distribution network, characterized by high reliability in power supply, high grade in energy quality, high efficiency in operation and control, and convenient access for distributed generations and multiple loads, has become the physical basis for Energy Internet, which takes the electricity as its core. Based on an introduction of the main application of AC/DC hybrid distribution networks in Energy Internet, the paper analyzes the typical application scenarios and main technical features of DC distribution technologies. Considering the research status of AC/DC hybrid distribution networks and the development requirement of energy internet, the paper also proposes the technical demands and research focus of the key technologies of AC/DC hybrid distribution networks, from the aspects of planning and design, key equipment, protection strategies, and operation and control strategies. The research achievements are significant for establishing the technical framework of AC/DC hybrid distribution networks.