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随着Ｉｎｔｅｒｎｅｔ、电子商务、ＩＤＣ机房的飞速发展，用户对ＵＰＳ供电系统的可用性提出了更高的要求，９９．９９９％的可用性，成为这些关键业务部门的标准配置，也就是１年３６５天中，ＵＰＳ供电系统的断电时间不能超过５分钟。 ＵＰＳ电源系统硬件的可靠性和可冗余性是整个供电系统可用性的基础，ＵＰＳ电源管理软件、智能附件提供的可管理性是提高用户系统可用性的重要手段，而完善的支持与售后服务体系是Ｕ ＰＳ供电系统可用性的最终保障。 对于传统结构的ＵＰＳ，虽然改善电路设计、生产工艺及元器件选择可以在一定程度上提高ＵＰＳ整机的可靠性，但目前在此方面的研究、实践表明， Ｕ ＰＳ硬件的可靠性的提高潜力已挖掘殆尽，需要开发新的研究思路，即在ＵＰＳ系统本身可冗余性方面想办法。传统的ＵＰＳ冗余方法一般采用串联或并联的方式，串联的方式由于自身的一些缺点已逐渐被淘汰，更多的公司采用两台或多台 Ｕ ＰＳ并联的方法。 下面以为全球“网络不间断”提供端到端全面电源解决方案的美国ＡＰＣ公司，在中国市场上主推的两款可冗余的中大功率Ｕ Ｐ Ｓ电源产品：Ｓｙｍｍｅｔｒａ（４－１６ＫＶＡ）系列和Ｓｉｌｃｏｎ（１０—４８０ＫＶＡ）系列为例，详细剖析一下ＵＰＳ电源系统?
With the rapid development of the Internet, e-commerce and IDC computer room, users have put forward higher requirements on the availability of the UPS power supply system. The availability of 99.999% has become the standard configuration for these key business units, that is, 365 days a year , UPS power supply system power-off time can not exceed 5 minutes. UPS power system hardware reliability and redundancy is the basis of the entire power supply system availability, UPS power management software, intelligent accessories to provide manageability is an important means to improve user system availability, and improve the support and after-sales service system is The ultimate guarantee of U PS supply system availability. For the traditional structure of the UPS, although improving the circuit design, manufacturing process and component selection can improve the reliability of the UPS machine to a certain extent, the research and practice in this aspect at present shows that the reliability of UPS hardware has the potential to improve Has been exhausted, the need to develop new research ideas, that is, the UPS system itself can be redundant ways to find a solution. Traditional UPS redundancy methods generally use series or parallel approach, in series because of some of their shortcomings have been gradually eliminated, more companies use two or more U PS parallel method. The following APC company to provide end-to-end comprehensive power solutions for the global “network continuous” solutions, the two main high-power U P S power supply products available in the Chinese market: the Symmetra (4-16KVA) series and Silcon (10-480KVA) series, for example, a detailed analysis of the UPS power system?