薛士敏;齐金龙;刘冲;廉杰;

• 1:智能电网教育部重点实验室(天津大学)

摘要(Abstract)：

伴随着新能源的推广和直流负荷的普及,直流微网因其具有提高分布式电源消纳效率的天然优势,契合未来电网环境清洁化、运行智能化的发展趋势,受到了广泛的关注和研究。在有关直流微网的众多研究方向中,接地方式的选取决定了接地故障特征,从而影响到保护方案的选择与整定,但学术界对直流微网接地的研究仍处于起步阶段。作者将通过对比多种接地方式的优缺点、应用价值、经济性等因素,选择最优的接地方案,在此基础上,设计在大过渡电阻接地故障的情景下仍能可靠动作的保护判据,并通过电阻限流器的接入消除保护死区。最后将设计一种横联保护原理,分析该保护方案在各种网络结构和不同故障位置时的适用性,并通过仿真验证保护方案的有效性。

关键词(KeyWords)： 直流微网;接地方式;保护原理;保护死区

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51577129);; 国家863高技术基金项目(2015AA050102);; 天津市自然科学基金项目(14JCYBJC21000)~~

作者(Author): 薛士敏;齐金龙;刘冲;廉杰;

Email:

DOI: 10.13335/j.1000-3673.pst.2017.1409

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