NEWS

As government de哥術partments and enterprises co黃店me under pressure 地熱to reduce data ce討志nter operating 物好costs and associ機我ated energy usage, uninterru吃雨ptible power supply (UPS) manu放機facturers are making design improve妹黑ments to their technologies an西自d products to improve operationa日在l efficiency.

Data center industry organ下通izations such as the Gre男水en Grid Association strongly recommend對紙 that enterprises use new multi-道錯mode UPS system technolo站吃gies that operate a友窗t 98 to 99 percent e湖不fficiency, replacing tradi北姐tional single-mode UPSs with 93 信議to 95 percent operating effi姐如ciency. This type of UPS 到兵is likely to grow significantly o歌妹ver the next five years.

Multi-mode UPS syste爸為m

What is a multimo高答de UPS system?

Multimode UPS systems provide d見長ata center operators with the ability還笑 to choose between two 睡北modes of operation: d開間ual conversion mode pr校熱ovides superior pow近討er protection, while multimode or "場見;ecomode" provide日師s efficient operational efficiency行吧. When the user selects multi-mod話錯e as the default operating mode to a東哥chieve 98% to 99能店% efficiency, if a power abno拿匠rmality is detected on the UPS i空森nput, the UPS system will automatic通行ally move to advanced protectio頻鐘n mode in less than two milli在答seconds. In the U.S., power anomali服草es that are detrimental to什為 IT-critical loads typically acc友了ount for only 3% of 開看business uptime,什關 so the chance of transitioning betwe外很en operating models througho樂也ut the year is likely to be mi體書nimal.

Dual conversion mode has b音笑een a typical powe黑廠r protection mode 開坐in large UPS sys這多tems for decades, but it also員來 has the significant weakness of alwa上在ys operating in the 93% to 白工95% range. Today, users demand hi大日gher UPS operating efficiency and雪她 lower total co南光st of ownership (TC明科O) without compromi但一sing adequate power protect草動ion. That's the k你暗ey to multimode 他畫UPS.

According to a study by Frost &a舊場mp; Sullivan, an enterprise'國輛s 50,000-square-foot data center c市那an save $3.1 million in costs by下歌 using a multimode UPS s理姐ystem over 10 year一我s and running it in multimode mode mo林現st of the time. These co些你sts come primarily from 請西the reduced energy co們個nsumption of UPS systems, as wel來會l as the energy consumption of v能見entilation and a歌做ir conditioning (HVAC) systems畫為 used to overcome heat dissipati謝錯on from UPS systems. As electric麗聽ity costs continue to rise, th數東e power savings from multimode UPSs如煙 will increase over time.

Other multimode advantages腦算 besides TCO

Multimode UPS offers ad林短ditional benefits in addition to子看 TCO and reduced 火雨energy consumption. The technology prov照是ides a "smart&qu討都ot; input power monitoring master, whe火做re the UPS will record the n見店umber and frequency of input power ano近謝malies that cause transitions from mul到小timode to dual-mode mode. To電雪o many or frequent p老內ower abnormalities will cause t土厭he UPS to "lock"白學; multimode for a peri劇弟od of time, allowin科外g the power to remain stabl麗又e for a period of time地可. As a result, multimode U船近PS systems can make intell少答igent, real-time logical decisi歌銀ons about when to use mul路兒timode or dual conversion modes to max國能imize critical load operation withou裡資t sacrificing operational effici嗎畫ency.

The second advantage 制爸of multimode UPS systems is extend資錯ed component life. During數雨 multimode operation白路, many UPS module components opera匠多te in low current an道我d low thermal ranges, resulting in校知 extended service life. Other compon雜紙ents, such as fans, c懂風an not run. Manufacturers of m爸站ultimode UPSs expect a one- to是大 two-year minimum life extensi家快on for many components.

The third advantage of a multi地和mode UPS system is the m歌說itigation of output fa讀身ilures. Any UPS output shorts or overlo分志ads will quickly be hand一拍led by upstream overcurrent protec民個tion devices, and there 草唱is no internal operating mo學用de in the UPS system to adjust. Th術資ese UPS output faults will be 舊近loaded directly on 吧西the source impedance of the power微時 supply, rather多為 than on the UPS inverter po關小wer supply, reducing fault losses.

Some UPS manufacturers, such as GE&#暗老39;s key power business, have 城雪designed additional unique fe山房atures into their mult近美imode systems, wh化劇ich GE calls eBoost technolog朋體y. These features include the us鄉黑e of line reactors in the power pat房飛h in economy mode operation, wh弟遠ich provides a level of power reg技妹ulation in this high efficiency mod笑喝e; Specifically, it mitigates 體影high-frequency &quo花遠t;surge" events and l長問ower-frequency "ri計冷ng waves," min要金imizing the transition t我飛o dual conversion mod站暗e. The design of t照行his reactor also allows cable leng白長th differences o放化f up to ±25% fr呢女om multiple UPS modules to paralle南去l output buses. This cable 森很length difference al物業so provides flexibility in 你業the design of the en票紅hanced floor layout. Some事頻 other UPS manufacturers must ke亮影ep the cable length difference at男物 ±10%, otherwise it may cause U日河PS power to dro少我p or parallel UPSs to operat紙相e improperly.

The reduction in operatin匠物g expenses (OPEX) for multimode UPS s讀月ystems, along wi短懂th the additional benefits desc藍中ribed above, provides many c嗎書ompelling reasons for data cen你土ter users to adopt this UPS t村樹echnology in th暗謝e foreseeable future. Multi-m爸爸ode UPS technology 動到should also be considered for other mi去吃ssion-critical an鐘照d/or process-critica你老l applications, especially for民通 high-power applications of 225kVA an對舊d above, where energy consumption is 店小a critical concern.