分布式可再生能源、 储能及直流负荷接入传统交流配网需经多级变流环节,导致系统能效低.交直流配用电技术可有效减少交直流转化的中间环节,提高配用电经济性、 供电可靠性和运行灵活性.综述了国内外交直流混合系统的网架结构设计、 关键设备研制及运行控制系统开发等多个方向的研究现状,以期能够对交直流混合系统的进一步研究及推广应用提供思路和借鉴.%Distributed renewable energy, energy storage and DC load need to be connected to traditional AC distribution network through multistage converter sections, which leads to low energy-efficiency of power system.The AC&DC power distribution tech-nology could reduce the intermediate links during AC &DC power transformation to improve the economy, reliability and operation flexibility of power distribution.This paper summarizes the present research situation and development trend of domestic and foreign AC&DC hybrid distributed renewable energy technologies from the aspects of system structure design, key equipment development and optimization control system development, in order to provide ideas and reference for further research and application of AC&DC hybrid system in the future.
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