該演示直流高電壓分布的可行性

　　多年來(lái)，我們看到了數(shù)據(jù)中心的使用激增，以滿(mǎn)足互聯(lián)網(wǎng)流量的需求，擴(kuò)大移動(dòng)語(yǔ)音/視頻/數(shù)據(jù)通信，并迅速發(fā)展云計(jì)算服務(wù)。因此，電力消耗已成為這些中心的經(jīng)濟(jì)的主要因素。添加到混合是巨大的壓力，以減少電力損耗和節(jié)約能源，這是來(lái)自監(jiān)管機(jī)構(gòu)，如環(huán)保局（EPA）和行業(yè)協(xié)會(huì)，如綠色電網(wǎng)。作為回應(yīng)，工程師們已經(jīng)采取了多種方法來(lái)提高數(shù)據(jù)中心和電信設(shè)施中使用的電力系統(tǒng)的整體效率。

　　這些策略之一涉及使用的高電壓直流（HVDC）總線。400 V（最大）直流電源分配（也稱(chēng)為一個(gè)380 VDC總線）的使用，已獲得業(yè)界的支持，有幾個(gè)原因。一個(gè)主要的吸引力是提高能源鏈的整體能源效率。從系統(tǒng)的觀點(diǎn)來(lái)看，研究表明，大約百分之十的能量效率更高，可以采用高壓直流供電相比傳統(tǒng)的ac-to-48 VDC的轉(zhuǎn)換實(shí)現(xiàn)，按照Vicor白皮書(shū)”高壓直流分布的關(guān)鍵是提高系統(tǒng)的效率和可再生能源的機(jī)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.