Grounding concept considerations and recommendations for 400VDC distribution system
Grounding concept considerations and recommendations for 400VDC distribution system
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400VDC 配电系统的接地概念注意事项和建议
DOI：
10.1109/intlec.2011.6099881
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
M. Szpek
中科院分区：
文献类型：
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作者：
K. Hirose;Toshimitsu Tanaka;T. Babasaki;S. Person;O. Foucault;B. Sonnenberg;M. Szpek
400 VDC正在成为电信大楼和数据中心以及ICT设备的新电压接口。400 VDC接口涵盖高达400 VDC的应用，典型标称电压为380 VDC。利用更高DC电压的关键驱动因素是相对于当前解决方案的整体效率和可靠性增益。然而，引入新的400 VDC接口带来了一些关于人员安全和系统接地实施的问题。虽然直流电被认为比交流电更安全，但到目前为止，电信运营商一直在犹豫是否部署400 VDC，因为它不像交流电那样常用和容易理解。本文针对400 VDC配电系统的接地问题，提出了高电阻中点接地的概念，作为400 VDC配电系统安全运行的有效方法。今天，欧洲、北美（NA）和日本的电信/电信设施采用的接地概念、实践、规范或规定略有不同。本文还回顾了不同的接地模型和他们的实施实践在欧洲，北美和日本。讨论了不同接地方式的优缺点，并对400 VDC配电系统选择高阻中点接地方式的原因进行了说明。
400VDC is becoming a new voltage interface for telecommunication buildings and data centers as well as for ICT equipment. 400VDC interface covers applications for up to 400VDC with a typical nominal voltage of 380VDC. Key drivers for utilizing a higher DC voltage are overall efficiency and reliability gains vs present solutions. However, introduction of a new 400VDC interface brings up some questions about personnel safety and implementation of system grounding. Although DC is considered safer than AC, till now datacom operators have been hesitant to deploy 400VDC because it's not as commonly used and well understood as AC. This paper addresses 400VDC grounding issues and recommends high resistance midpoint grounding concept, as an effective way to provide safe operation of 400VDC distribution systems. Today Europe, North America (NA), and Japan telecom/ datacom installations employ slightly different grounding concepts, practices, codes, or regulations. This paper also reviews different grounding models and their implementation praxis in Europe, NA, and Japan. Benefits and the disadvantages of different grounding concepts are discussed and explanation of the reasons for selection of high resistance midpoint grounding as a preferable model for 400VDC distribution system is provided.