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电网技术  2018, Vol. 42 Issue (8): 2594-2603    DOI: 10.13335/j.1000-3673.pst.2017.2284
  电力系统 本期目录 | 过刊浏览 | 高级检索 |
中压直流配电系统接地方式研究
李蕊1, 罗飞2, 焦在滨2
1.中国电力科学研究院有限公司,北京市 海淀区 100192;
2.陕西省智能电网重点实验室(西安交通大学),陕西省 西安市 710049
Grounding Mode Research of MV DC Distribution System
LI Rui1, LUO Fei2, JIAO Zaibin2
1. China Electric Power Research Institute, Haidian District, Beijing 100192, China;
2. Shaanxi Key Laboratory of Smart Grid (Xi’an Jiaotong University), Xi’an 710049, Shaanxi Province, China;
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摘要 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。
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李蕊
罗飞
焦在滨
关键词:  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: On basis of features of DC distribution network based on voltage source converters (VSCs), grounding mode in MV DC distribution system was studied to improve power supply reliability in this paper. Firstly, the main features of DC distribution network was analyzed, i.e., symmetrical monopolar structure widely adopted, two-level converter or multiple module converter (MMC) employed according to voltage levels, and DC distribution network connected to AC system with or without transformer. On this basis, in order to ensure power supply continuity and power quality, coupling relationship of grounding modes in AC side and DC side was analyzed for both two-level converter and MMC converter. Then, the grounding modes in DC distribution system were studied. Lastly, recommended DC distribution network schemes were given in different operation scenarios and verified with simulation.
Key words:  MV DC distribution system    grounding mode    MMC    two-level converter    pole-to-ground fault    fault recovery
收稿日期:  2017-09-18                     发布日期:  2018-08-08      期的出版日期:  2018-08-05
ZTFLH:  TM721  
基金资助: 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)
作者简介:  李蕊(1978),女,教授级高级工程师,研究方向为直流配电、电力系统运行分析及新能源接入,E-mail:lirui@epri.sgcc.com.cn;罗飞(1994),男,硕士研究生,通信作者,研究方向为直流配电网接地与保护,E-mail:438303010@qq.com。
引用本文:    
李蕊, 罗飞, 焦在滨. 中压直流配电系统接地方式研究[J]. 电网技术, 2018, 42(8): 2594-2603.
LI Rui, LUO Fei, JIAO Zaibin. Grounding Mode Research of MV DC Distribution System. POWER SYSTEM TECHNOLOGY, 2018, 42(8): 2594-2603.
链接本文:  
http://www.dwjs.com.cn/CN/10.13335/j.1000-3673.pst.2017.2284  或          http://www.dwjs.com.cn/CN/Y2018/V42/I8/2594
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