汇集各类分布式能源,构建交直流混合超级电网,是世界各国应对当前能源危机的一大举措.然而缺乏稳定、可靠的故障保护技术是限制其发展的主要因素之一.首先概述了交直流混合电网的发展现状,着重介绍了欧洲、中国、美国、日本等多个地区及国家的超级电网构想及计划.进而对交直流混合配电方式的系统架构,系统特点及其关键技术等方面的内容进行了详细的分析,并从故障区域、故障特征、故障保护等方面总结了其在保护方面的特殊性及要求.最后对今后故障保护技术的研究方向进行了展望.%Collecting all kinds of distributed generation and constructing AC/DC hybrid power grid have become one of the major measures to overcome the energy crisis.However the lack of stable and reliable fault protection technology has become one of the main factors,which limits its development.Firstly,this paper summarizes the development situation of AC/DC hybrid power grid at home and abroad,focuses on the conception and plan of super grid from Europe,China,the United States,Japan,and other regions and countries.And then the system structure,characteristics and key technology of AC/DC hybrid power distribution are analyzed in detail,and the particularity and requirement of protection technology are summarized from the content of fault area,fault feature and fault protection.Finally,the technical research direction on protection in the future is prospected.
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