李蕊;罗飞;焦在滨;

• 1:中国电力科学研究院有限公司
• 2:陕西省智能电网重点实验室(西安交通大学)

摘要(Abstract)：

在分析基于电压源换流器的直流配电网特点的基础上,从提高直流配电网供电可靠性出发,对中压直流配电系统的接地方式进行了研究。首先,分析了直流配电网的主要特点,即:广泛采用对称单极的结构;根据不同的电压等级可能采用两电平换流器或模块化多电平(MMC)换流器;可以通过联接变压器与交流系统相连,也可以直接与交流系统相连。在此基础上,分别针对两电平换流器和模块化多电平(MMC)换流器,分析了交流侧接地方式与直流侧接地方式的耦合关系,并以保证直流配电网供电的连续性和电能质量为目标,对直流配电系统的接地方式进行了研究。最后,针对直流配电网的运行场景,给出了直流配电系统接地的推荐方案,并通过仿真验证了方案的合理性。

关键词(KeyWords)： 中压直流配网;接地方式;模块化多电平换流器;两电平换流器;单极接地故障;故障恢复

Abstract:

Keywords:

基金项目(Foundation): 国网公司科技项目“直流配电网络架构与关键技术初证研究”(PDB17201600116)~~

作者(Author): 李蕊;罗飞;焦在滨;

Email:

DOI: 10.13335/j.1000-3673.pst.2017.2284

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