该演示直流高电压分布的可行性

　　该演示直流高电压分布的可行性

　　多年来，我们看到了数据中心的使用激增，以满足互联网流量的需求，扩大移动语音/视频/数据通信，并迅速发展云计算服务。因此，电力消耗已成为这些中心的经济的主要因素。添加到混合是巨大的压力，以减少电力损耗和节约能源，这是来自监管机构，如环保局（EPA）和行业协会，如绿色电网。作为回应，工程师们已经采取了多种方法来提高数据中心和电信设施中使用的电力系统的整体效率。

　　这些策略之一涉及使用的高电压直流（HVDC）总线。400 V（最大）直流电源分配（也称为一个380 VDC总线）的使用，已获得业界的支持，有几个原因。一个主要的吸引力是提高能源链的整体能源效率。从系统的观点来看，研究表明，大约百分之十的能量效率更高，可以采用高压直流供电相比传统的ac-to-48 VDC的转换实现，按照Vicor白皮书”高压直流分布的关键是提高系统的效率和可再生能源的机遇”。1

　　This white paper points out that there are several other factors driving power-electronics designers toward the new 400 VDC topology. For example， unlike AC， DC does not require source synchronization and can draw power from renewable sources like solar and wind. In addition， it does not need phase balancing and harmonics is not an issue. Moreover， most back-up energy sources， such as batteries and flywheels， are inherently DC. Finally， by minimizing power-conversion stages， along with building wiring， copper， and connectors， HVDC offers a lower total cost of ownership （TCO）。

　　In last few years， a number of research labs， including Lawrence Berkeley National Lab and the Intel Labs， as well power supply manufacturers like Vicor have demonstrated the concept and the energy-efficiency benefits of using high-voltage DC-power distribution in data centers and telecom systems （see the TechZone article “High-Voltage DC Distribution Improves Data Center System Efficiency”）。 At the 36th International Communications Energy Conference （INTELEC） in Vancouver， Canada last October， some power supply manufacturers went beyond proof of concept. They demonstrated the viability of adopting HVDC power distribution in data centers and telecom plants， including buildings.