Facility-level DC vs. typical ac distribution for data centers: A comparative reliability study
Facility-level DC vs. typical ac distribution for data centers: A comparative reliability study
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数据中心设施级直流配电与典型交流配电：可靠性比较研究
DOI：
10.1109/tencon.2010.5686625
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Peter W. Sauer
中科院分区：
文献类型：
--
作者：
V. Sithimolada;Peter W. Sauer
本文针对关键数据中心负荷，对设备级400VDC范围内的直流配电系统与典型的交流配电系统进行了可靠性比较分析。建立假设和条件是为了进行有意义的比较。使用固有可用度和生存函数作为两个可靠性度量。建立了各种常见结构的可靠性分析模型，并根据一组通用可靠性数据得到了定量的结果。研究表明，在考虑多个不间断电源和负载但无冗余的配置时，直流系统在一定程度上比交流系统更可靠。然而，在具有冗余度的大范围内，直流将具有与典型交流分布相似的可靠性水平。
This paper presents a comparative reliability analysis of a dc power distribution system in a range of 400 Vdc at the facility level against a typical ac distribution, for critical datacenter loads. Assumptions and conditions are established to allow meaningful comparisons. Inherent availability and survival function are used as the two reliability metrics. Analytical reliability models for various common configurations are developed, and quantitative results are obtained based on a set of generic reliability data. The study indicates that the dc system would be more reliable than the ac to a certain extent when considering a configuration with multiple units of uninterruptible power supply and loads but without redundancy. However, on a large scale with redundancy, it is shown that the dc would have a similar reliability level to that of the typical ac distribution.