科士达UPS电源在电磁兼容符合性问题的解决方案

科士达UPS电源

根据多年来人们对电磁兼容的研究和实践的经验表明，假定在产品开发阶段解决电磁兼容问题的费用为1，则在型号研制阶段解决需要的费用可能为10，到批量生产时解决需要的费用可能达100，到现场安装时解决需要的费用可能上千倍或者无法解决。因此，科士达UPS电源电磁兼容的问题必须在产品的开发阶段解决。

针对科士达UPS电源的产品特点，科士达UPS电源的电磁兼容主要包含以下几个部分：电源的输入、输出传导*;电源的辐射骚扰;科士达UPS电源的抗*特性。下面逐项阐述达到相关标准要求的设计方法。

1、科士达UPS电源输入、输出传导的抑制

针对传导骚扰，可以从三个方面来考虑：*源、传导途径和直接的骚扰抑制。

A、*源的消除和降低：在科士达UPS电源中有整流的AC/DC变换，有SPWM逆变的DC/AC逆变器，有PFC的高频变换电路，有DC/DC变换的回路，这些都是科士达UPS电源内重要的骚扰源，尤其是其中的变压器、电感、高频电流回路，因此，合理地设计相应变压器和电感的参数、加工工艺和在整机中的布局将可能大幅度降低它们的骚扰强度，合理地设计高频电流的PCB、布线也可以改善科士达UPS电源的骚扰;对于功率变换器中的驱动电路，可以在不影响效率和内阻的情况下加大驱动电阻，增加开关电源的上升、下降沿时间，从而减少电压、电流的高频谐波含量。

B、传导途径的抑制：由于所有的传导*只有通过适当的空间和导体途径才可能作用到科士达UPS电源的输入、输出电源端子，因此，尽量减少传递的途径也是减低科士达UPS电源骚扰的有效方法。例如，将所有的*源安装在离输入、输出端子较远的位置，输入、输出的电源线不从*源附近走线，在*源的进出位置加强抑制处理，通过屏蔽手段将*源和其它部分进行空间隔离，电源的输入、输出等分别在整机的相对较远位置等。

Corstal UPS Power Supply
According to the research and practice experience of EMC for many years, assuming that the cost of solving EMC problem in product development stage is 1, the cost of solving EMC problem in model development stage may be 10, the cost of solving EMC problem in batch production may be 100, and the cost of solving EMC problem in field installation may be thousands of times or can not be solved. Therefore, the EMC problem of COSTAR UPS power supply must be solved in the product development stage.
According to the product characteristics of Corstal UPS power supply, the EMC of Corstal UPS power supply mainly includes the following parts: input and output conduction*; radiation disturbance of power supply; anti* characteristics of Corstal UPS power supply. Next, the design methods to meet the requirements of relevant standards are described item by item.
1. Suppression of Input and Output Conduction of Corstal UPS Power Supply
For conductive harassment, three aspects can be considered: source, conductive pathway and direct harassment suppression.
Elimination and reduction of A and * sources: There are rectifier AC/DC converter, SPWM inverter DC/AC converter, PFC high-frequency converter circuit and DC/DC converter circuit in Corstal UPS power supply. These are all important disturbance sources in Corstal UPS power supply, especially transformer, inductance and high-frequency current circuit. Therefore, the parameters and processing of transformer and inductance should be reasonably designed. The technology and layout in the whole machine will greatly reduce their disturbance intensity. Reasonable design of PCB and wiring of high frequency current can also improve the disturbance of Kosta UPS power supply. For the driving circuit of power converter, the driving resistance can be increased without affecting efficiency and internal resistance, and the rising and falling time of switching power supply can be increased, thus reducing voltage and current. High frequency harmonic content.
B. Suppression of Conduction Pathway: Since all conduction * can only be applied to the input and output terminals of Kosta UPS power supply through appropriate space and conductor channels, minimizing the transmission path is also an effective way to reduce the disturbance of Kosta UPS power supply. For example, all the * sources are installed far from the input and output terminals, the input and output power lines do not follow the line near the * source, the suppression processing is strengthened at the * source's entry and exit positions, the * sources and other parts are isolated by shielding means, and the input and output of the power sources are relatively far away from the whole machine, etc.

C、直接的骚扰抑制：对于采用上述方法后仍然无法符合标准要求的情况，直接在输入、输出回路采用相应的EMI滤波器件，如电感、高频电容、专用滤波器等将可以再次有效压低科士达UPS电源整机对外的传导*，实践表明，只要适当加大滤波器的相关参数和衰减的DB值，一般都可以将科士达UPS电源的传导骚扰压低到标准的限值以内。当然，滤波器的安装必须越靠近输入、输出电源端子越好，因为即使是多几厘米长的接线也会增大*，插座式的滤波器将是最为理想的选择。另外，在滤波器中的电容或外加的EMI滤波电容最好是无感的，以增强滤波效果。

2、整机辐射*的抑制

对于科士达UPS电源的辐射*，主要有两种方法：辐射源的强度抑制和辐射途径的处理。

A、辐射源的抑制：在科士达UPS电源中，辐射源的辐射强度抑制方法基本同传导的处理相同，因为*源本身即有传导骚扰又有辐射骚扰;另外，对于辐射骚扰，对辐射源采取适当的屏蔽措施将可十分有效地降低辐射*的电平和能量。

B、辐射途径的处理:整机外壳的等电位设计：根据电磁场原理，一个接地良好理想密闭的金属六面壳体的内外电磁场不存在相互*，因此科士达UPS电源的外壳一般应作成金属的，且各个面之间应良好连接，保证为一个等电势体，这样即可十分有效减弱科士达UPS电源对外的辐射*。一般对于电磁兼容要求严格的场合，科士达UPS电源的壳体不宜采用塑料制作。

进出科士达UPS电源壳体连线的处理：由于科士达UPS电源必须有输入、输出电源端子、电池扩展端子等连线进出UPS的外壳，因此这些线的防骚扰处理将十分重要，直接影响到测试的结果能否符合标准要求。一般在这些线上适当地加些高频磁环和高频电容就会有很好的效果。

3、科士达UPS电源的抗*设计

科士达UPS电源的抗*主要体现在控制电路的抗扰性，从电路的性质可分为模拟电路的抗*和数字电路的抗*两个方面。良好的抗扰性是保证科士达UPS电源正常运行的条件，因此，在科士达UPS电源的控制回路的设计初期就必须将控制电路的抗扰性考虑进去，否则，遇到外界骚扰时整套的控制方案将可能全部推翻。

A、模拟电路的抗*：

对于开环的模拟控制，一般针对可能出现*的部位适当加入一定的RC电路将骚扰消除;对于闭环的模拟控制，除了采用RC外，还必须对闭环的放大倍数的频率特性进行适当的调整，确保*信号加入时不会对环路产生恶果。

对于功率部分的电路，减短所有的连线、加入假负载、减小功率驱动的回路等都可以有效增强功率电路的抗*能力。

C. Direct Harassment Suppression: In the case that the above-mentioned method still fails to meet the standard requirements, directly using corresponding EMI filters in the input and output circuits, such as inductors, high frequency capacitors, special filters, etc., will again effectively reduce the external transmission of Corstal UPS power supply*. Practice shows that as long as the relevant parameters of filters and the attenuated DB values are properly increased. Usually, the conductive disturbance of Kosta UPS power supply can be reduced to the standard limit. Of course, the closer the filter is installed to the input and output power terminals, the better, because even a few centimeters long wiring will increase*, socket filter will be the best choice. In addition, the capacitor in the filter or the additional EMI filter capacitor is better sensorless to enhance the filtering effect.
2. Suppression of Radiation*
There are two main methods for the radiation of Kosta UPS power source: intensity suppression of radiation source and treatment of radiation pathway.
A. Suppression of radiation source: In the UPS power supply of Costa, the radiation intensity suppression method of radiation source is basically the same as that of conduction, because * source itself has both conduction disturbance and radiation disturbance. In addition, for radiation disturbance, appropriate shielding measures for radiation source will effectively reduce the level and energy of * radiation.
B. Processing of radiation path: Equipotential design of the whole machine shell: According to the principle of electromagnetic field, there is no mutual * between the internal and external electromagnetic fields of a metal hexahedron shell with good grounding and ideal sealing. Therefore, the outer shell of the Corstal UPS power supply should generally be made of metal, and each side should be well connected to ensure that it is an equal potential body, so that the Corstal UPS power supply pair can be effectively weakened. External radiation*. Generally, the case of Corstal UPS power supply should not be made of plastic when EMC requirements are strict.
Processing of the connection of the UPS power supply case in and out of Kosta: Since the UPS power supply in Kosta must have input, output power terminals, battery expansion terminals and other connections in and out of the UPS case, the anti-disturbance treatment of these lines will be very important, directly affecting whether the test results meet the standard requirements. Generally, adding some high frequency magnetic rings and capacitors properly on these lines will have a good effect.
3. Anti-interference Design of Corstal UPS Power Supply
The anti-interference of Kosta UPS power supply is mainly embodied in the anti-interference of control circuit. From the nature of the circuit, it can be divided into the anti-interference of analog circuit and the anti-interference of digital circuit. Good immunity is the condition of guaranteeing the normal operation of Corstal UPS power supply. Therefore, the immunity of control circuit must be taken into account in the early design of control circuit of Corstal UPS power supply, otherwise, the whole control scheme will be overturned when encountering external disturbance.
A. Resistance of analog circuits*:
For open-loop analog control, the disturbance will be eliminated by adding a certain RC circuit to the position where * may occur. For closed-loop analog control, besides adopting RC, the frequency characteristics of the amplification factor of the closed-loop must be adjusted properly to ensure that * signal will not produce harmful effects on the loop when it is added.
For the power part of the circuit, reducing all the connections, adding false loads, reducing the power-driven circuit and so on can effectively enhance the resistance of the power circuit.

B、数字电路的抗*：

对于数字控制电路，其抗扰性对科士达UPS电源的可靠性十分重要，因为目前几乎所有的科士达UPS电源控制都有采用到数字控制的单片机，抗扰性差的系统将可能导致科士达UPS电源的停机或损坏。

数字电路电源的有效滤波是数字电路不受*的基本保证;所有的I/O口应有适当的RC处理;控制电路应尽量远离功率部分;适当的电磁屏蔽措施;良好的PCB布局设计等都可以有效避免数字系统受到外界*。

应明确指出的是，对于科士达UPS电源闭环的稳压、同步控制，控制模型的抗*性和软件滤波处理方法在系统建模时就必须有充分合理的考虑，并在系统调试时做完整实验。

科士达UPS电源设备是指不会因短暂停电中断、可以一直供应高品质电源、有效保护精密仪器的电源设备。是把储能蓄电池与科士达UPS电源连接在一起，接通市电，在市电状态下市电经过科士达UPS电源主机的逆变为后端负载设备，提供稳压稳频的额纯净能源，在市电异常状态下储能电池经过科士达UPS电源主机的逆变能力，将DC直流逆变为AC交流最终承担起负载设备的能力，并且依据蓄电池储存的能量，为后端设备提供相应的续航时间。

在科士达UPS电源的组装过程中建议如下：

1、设备就位，开箱检验设备在运输过程中，有无磕碰，外观收到损坏现象，蓄电池有无倒置造成漏液现象

2、检查无异常，开始组装蓄电池，电池组多组并联的时候，本着先串联后并联的安装要求，连接主机之前用万用表检测电池组直流电压是否是UPS电源主机所需的机器开机直流电压

(1)直流不对检查电池连接有无接错现象(2)无异常进行下步安装步骤

3、将电池组与科士达UPS电源连接在一起，市电输入输出接好，接通UPS电源后部空开，外用表检测各连接部位电压，无异常开机调试。

 为适应新的DC局房建设改造模式,控制投资规模,积极推进“轻资产”的运营模式,本文通过高频UPS与模块化科士达UPS电源的建设方案对比,从传统UPS系统配置中跳出,通过优化模块化UPS的系统配置,提出“2N-”系统概念,满足需求与安全性,同时减少投资、提高灵活度,达到创新性使用新设备的目的。

1 关于DC局房改造建设的背景及要求

根据中国联通的IDC布局定位,要构建“集团级战略/核心基地+省级DC+地市DC/边缘节点”三级云数据中心体系,分层分级满足不同地域、不同类别客户业务需求,三级云数据中心一体化协同部署与运营,全网覆盖形成M(集团级)+1(省级中心)+N(地市级边缘)规划格局。

Resistance of Digital Circuits*:
For the digital control circuit, its immunity is very important to the reliability of Kosta UPS power supply, because almost all of the current Kosta UPS power supply control has adopted the digital control single-chip computer, the system with poor immunity may lead to the shutdown or damage of Kosta UPS power supply.
Effective filtering of digital circuit power supply is the basic guarantee that digital circuit is not *; all I/O ports should be properly processed by RC; control circuit should be as far away from the power part as possible; appropriate electromagnetic shielding measures; good PCB layout design and so on can effectively avoid digital system from being exposed to external *.
It should be clearly pointed out that for the closed-loop voltage stabilization and synchronization control of Kosta UPS power supply, the resistance of the control model and the method of software filtering processing must be fully and reasonably considered in system modeling, and complete experiments should be done in system debugging.
Corstal UPS power supply equipment refers to the power supply equipment that can provide high quality power supply and effectively protect precision instruments without interruption due to short power outages. It is to connect energy storage battery with Kosta UPS power supply, connect the power supply to the market, and in the state of power supply, the power supply will be converted into back-end load equipment through the inversion of Kosta UPS power supply mainframe, providing a stable and frequency-stable amount of pure energy. In the abnormal state of power supply, the energy storage battery will pass through the inversion ability of Kosta UPS power supply mainframe, and the DC DC inversion will ultimately bear the capacity of AC AC load equipment. And according to the energy stored in the battery, it can provide the corresponding life time for the back-end equipment.

In the process of assembling the UPS power supply in Costa Rica, the following suggestions are made:

1. Equipment in place, open-box inspection equipment in the transport process, whether there is bump, appearance received damage, whether there are inverted batteries cause leakage phenomenon.

2. Check that there is no abnormality and start assembling batteries. When multiple batteries are connected in parallel, in line with the installation requirements of series connection and parallel connection, before connecting to the host computer, use multimeter to check whether the DC voltage of the battery is the DC voltage of the machine startup required by the host of UPS power supply.

(1) DC does not check whether the battery connection is wrong or not. (2) Next installation steps without abnormality

3. Connect the battery pack with the Kosta UPS power supply, connect the municipal power input and output, open the rear part of the UPS power supply, check the voltage of the connecting parts with the external meter, and debug without abnormal start-up.
In order to adapt to the new DC building reconstruction mode, control the investment scale and actively promote the operation mode of "light assets", this paper compares the construction scheme of high frequency UPS and modular Kosta UPS power supply, jumps out of the traditional UPS system configuration, and proposes the concept of "2N-" system by optimizing the modular UPS system configuration, to meet the needs and security, while reducing investment and improving flexibility, to achieve the goal. The purpose of innovative use of new equipment.

1. Background and Requirements of DC Housing Renovation and Construction

According to the IDC layout and positioning of China Unicom, the three-level cloud data center system of "group-level strategy/core base+provincial DC+municipal DC/edge node" should be constructed to meet the business needs of different regions and types of customers at different levels. The three-level cloud data center should be deployed and operated in an integrated way, and the whole network coverage will form the planning pattern of M(group level)+1(provincial center)+N(municipal edge).


2015年,联通全国有PSTN机房退网,约有2300多个端局、6万多模块局需要退网改造,绝大多数PSTN端局集中在北方十省(占87%),其中省会城市约占27%。

通过考察现有交换局房的使用情况,交换局房一般具有建设年代早、基础设施条件差、数量多、单局空余面积较小等特点,考虑IDC业务发展规划格局,交换局房改造定为N类规划格局,定位于中、低端IDC机房,满足互联网及本地中小企业客户租赁机柜、带宽的需求,这些用户对机房要求低、价格敏感、属地化要求高。

2 河北IDC建设背景及在用机柜功耗分析

河北省目前11个地市分公司都有IDC机房,并拟在2017～2019年规划重点发展IDC业务。

   由于IDC业务是一种密集、高能耗产品，建设前期投资大，配套UPS、蓄电池组及空调等设备投资占局房内设备的50%以上，运营期PUE值测算甚至达到2.0，能耗费用支出长期居高不下。因此，降低投资成本，减少运维能耗成本，就要在建设初期进行合理的设备选型及配置核算，减小设备冗余度，使设备系统利用率及工作效率达到最优状态。

通过统计，目前省内IDC单机柜的平均功耗从1kW到3kW不等，部分机房从2007年建成至今单机柜功耗始终未超过1kW，全省IDC机房统计单机柜平均功耗仅为1.6kW，与业务需求部门提出的3kW、4kW单机柜功耗需求相差太大，直接导致局房高低压系统、油机系统、通信电源配套系统冗余量超出设计值的50%，造成建设投资严重浪费。

但是业务发展需求又是与市场密切关联的,单一降低单机柜功耗指标是不现实的,且存在运行风险。因此,研究并出合理的通信电源设备配置方案,是本文关注的重点所在。

3 DC局房科士达UPS电源配置选型的可行性分析

联通集团关于DC局房改造局站的选取建议:①优先选择建成年代较近(不超过25年);

②建设标准较高(楼面活荷载不低于6kN/m2);

③抗震性能较好(框架、框剪结构)。

然而从实际统计数据分析,由于早期机房的建设标准较最新标准各项指标略显不足,尤其承重荷载指标,早期机房普遍承重荷载为6kN/m2,甚至有些建筑图纸缺少承重数据标记。因此,楼面活荷载不低于6kN/m2便成为一个最低限指标。

以常用的300～400kVA的UPS产品测算:

①集团集采的传统工频科士达UPS电源的承重荷载要求普遍超过了10kN/m2,甚至部分厂家设备承重荷载要求达到13kN/m2,原有局站承重荷载基本不能满足电源设备使用要求。

②集采入围的高频UPS设备承重荷载要求在8kN/m2左右,通过对设备进行合理布局(如将设备安装在承重梁上)或通过安装引力扩散架等改造手段,使设备符合安装条件,可以作为设备选型之一。

③近年来推出的模块化UPS承重要求普遍为5kN/m2左右,属于轻量型设备,符合承重要求,本次也作为设备选型之一。下面对符合安装条件的高频UPS系统和模块化UPS系统进行多方面计算与比较,并选出最优配置方案。

4 使用模块化科士达UPS电源系统的技术前提

①模块化科士达UPS电源的使用前提,应解决好以下两方面问题:

一是其可靠性是否通过了技术验证。经过这些年的厂家的不断推广、改进,以及各运营商的实际运营经验,在最新的采购数量统计中,移动公司的采购占到了近30%,年度增长率达360%,移动公司的使用在一定程度上验证了其可靠性。多模块交流并联的安全性顾虑也通过技术的演进基本得到解决。

二是运维部门对模块化UPS系统使用安全模式的认可。顾名思义,模块化系统其安全备用采用的是模块的备用,一套单台模块化UPS系统在配置了“N+X”备用的模块后,其安全性基本等同于一套N+1多台高频UPS系统。如果沿用N+1系统模式将设备换用为模块化UPS系统,则其优异的扩容性、备用的方便性便被高昂的投资成本所抵消。

在本次应用场景中,由于公司加大了投资效益的考核,且对改造DC局房所面对的用户层级进行了明确的定位(定位于T2-T3),单台模块化UPS的系统安全性能够满足业务需求,因此模块化UPS系统进入了技术筛选范围。

②使用模块化UPS需优化配置

使用模块化UPS,并创建“2N-”系统,安全性接近2N系统。通过合理预留扩容模块位置,预留输出屏端子及蓄电池接入开关,便可以解决设备投产后早期用户数量或负荷偏小造成的冗余设备投资的浪费,使设备工作在最佳负荷区,发挥出最高工作效率,既节省工程投资,又节省运营支出成本。

5 不同UPS供电方案的可靠性及投资效益对比

案例:在XX局IDC机房4F、5F各新增IDC机架190架,共计380架,本期按单机柜功耗按2kW计列、终期单机机柜功耗按3.3kW考虑进行电源方案配置。交流不间断电源及后备蓄电池组设备的容量按近期负荷配置,考虑远期负荷增加时可进行设备扩容以满足远期配置。

(1)高频UPS系统

供电方式常采用以下三种方式:

①“1+1”并联冗余UPS电源系统;

②“2+1”并联冗余UPS电源系统;

③2N双总线UPS电源系统。

各种供电方式的负载率要求见表1。本次采用“2+1”高频UPS系统进行方案论证,“2+1”UPS系统图,见图1。

      

   UPS系统功率因数按0.9考虑,通信局(站)电源系统维护技术要求第4部分:不间断电源(UPS)第4.3.6条规定:“对于N+l并联冗余系统,系统输出端的最大负载应不超过UPS容量×N×80%”。本期某局新增IDC机柜380个,单机柜功率2kW,交流负载总功率需求760kW,本期需新建UPS容量为:760kW/0.9/0.8=1055(kVA),终期交流负载总功率2111kVA。本期采用400kVA(2+1)并联冗余UPS。本期需要UPS系统数量=1055/800=1.3套400kVA“2+1”UPS系统,终期需要2.6套400kVA“2+1”UPS系统。而按照传统系统配置原则一般会按终期方案实施。反推计算:3套400kVA“2+1”UPS系统带380个机架,每套平均带127个机架,在初期负载2kW的情况下,每套系统带载253kW,400kVA“2+1”UPS系统每台带负载84kW,负载率为23%,经查阅多个厂家提供技术参数,23%负载率时的UPS系统效率较低,见图2。

蓄电池配置分析:蓄电池组的常规配置方案是按照终期负荷计算后备时间,并对每台UPS设备配置一组蓄电池组。经计算,应配置1000Ah/384V蓄电池组9组。若按以上配置结果,则在负载为2kW/机架的运行期间,则系统电池后备时间将大幅攀升至2h。

如果蓄电池组考虑分期建设,则3套400kVA“2+1”UPS系统在初期配置需要9组500Ah/384V蓄电池组,终期按需扩容至18组500Ah/384V蓄电池组。

投资分析:综上所述,通过对传统UPS系统配置、蓄电池组配置及设备投资进行详细分析,不难发现我们按照传统UPS系统的建设思路,UPS主机及UPS蓄电池组直接按照终期负载需求配置,会造成建设投资严重的浪费,建议根据业务发展需求合理规划通信电源设备容量,分步按需配置。传统UPS配置投资见表2和表3。

      

     　(2)模块化UPS“2N-”系统

①系统配置分析

针对上述案例,考虑本期电源主要为IDC机柜提供电源保障,通信设备采用交流不间断电源(UPS)设备进行供电,本期方案UPS设备选型为模块化500kVAUPS系统,两台模块化500kVAUPS系统构成“2N-”系统(表4):即模块化500kVAUPS系统形成2N系统结构,但负荷使用率不是按照单台设备承担不超过40%的传统2N模式,而是单台设备可以承担60%～80%的负荷,其冗余为另一台UPS设备1～2个模块故障退服造成的负荷增加。计划新增4台单机模块化500kVAUPS系统满足4F、5F机房设备用电需求,简单计算:单系统负责给95个IDC机柜供电。系统模块数量按照近期负荷需求(2kW/机柜)配置,因此单系统配置7个50kVA模块,其中主用模块5个,后续平均单机柜功耗超过2kW时,按需进行模块扩容,满足设备用电。

负荷确定后,两台单机模块化UPS设备组成一个“2N-”系统:每台单机模块化UPS设备供电给190个机架的一侧电源,形成机架的双供电模式。反推计算:每套单机模块UPS系统每台平均带95个机架,在初期负载2kW的情况下,每套系统带载190kW,7个模块350kVAUPS系统每台带负载率为60%,经查阅多个UPS厂家提供技术参数,60%负载率的UPS系统效率约96%,UPS系统工作在最佳状态。

②UPS系统结构图见图3

③蓄电池配置

不同厂家蓄电池的恒功率放电数据会稍有所差别,参考厂家提供的恒功率放电数据表,单体电池放电终止电压1.75V时功率为

P=η×S×λ×cosφ/n

式中,η——放电安全系数;取1.25;

S——UPS系统额定容量;

λ——UPS系统使用额定容量百分比;取80%;

cosφ——UPS主机输入功率因数;取0.9;

n——蓄电池只数。取384只。

基于以上计算方法,即:P=733W。查恒功率放电数据表得出:满足350kVAUPS系统(按近期负荷配置UPS)正常运行后备时间约30min需要配置蓄电池组400Ah/768V,后期若单机柜平均功率达到3.3kW时,UPS系统容量扩容至满配500kVA,将原有蓄电池组并联扩容至800Ah/768V。其中蓄电池开关箱需配置2个800A直流开关,方便后期直接进行蓄电池组扩容。

④投资分析

模块化UPS“2N-”系统的投资分析见表5和表6。

     　 6 UPS配置方案对比总结

综上论证,模块化UPS“2N-”系统与高频UPS系统相比,无论从机房承重、安装空间、系统布线、工作效率等多方面,还是从建设投资及设备运行核算考虑,模块化UPS“2N-”系统总体上都优于高频UPS系统。

因此对于模块化UPS“2N-”系统供电,UPS系统数量可按照终期用电需求进行配置,实际系统容量按照近期负荷配置模块,后备蓄电池组的容量按照近期需求配置。后续按实际需要进行模块、蓄电池的扩容,进而保证在节省建设成本的同时降低了后期电源运营成本的支出。

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