直播机房UPS电源使用经验

1 UPS电源的选择 UPS（Uninterruptible Power System）即不问断电源系统，当市电正常输入时，UPS就将市电稳压后供给负载使用，同时对机内电池充电，把能量储存在电池中，当市电中断（事故停电）或输入故障时，UPS立即将机内电池的能量转换为220V交流电继续供负载使用，使负载维持正常工作并保护负载软硬件不受损坏。     

UPS电池系统的配置与维护探讨

UPS可单机运行，也可多机联合运行。多机联合工作又分为：并机、串机。并机既可主备并机，又可冗余并机。UPS中蓄电池容量的选配也至关重要。文中结合在实际工作中的维护经验，论述了UPS的选型和配置，UPS及其电池系统的维护检测方法，推荐一种安全的电池放电方法和一种简易的采用电池离线模拟放电的测量电池电压方法。     

调度自动化机房UPS供电系统的设计与维护

就调度自动化机房UPS供电系统设计,提出了系统各组成部分具体设计方法与原则,包括供电方式的选择、UPS配置、电池容量计算方案等;对UPS主机和电池的正确日常维护可以及时发现设备异常,提高UPS运行效率、减少故障率。     

UPS中的蓄电池标称电压的选择

文章列举了不同类型UPS的蓄电池标称电压,分析了单相小功率UPS电池标称电压选择的依据和三相大功率UPS 348V电池或384V电池的优缺点。     

直播机房UPS电源使用经验

1 UPS电源的选择 　　UPS(Uninterruptible Power System)即不间断电源系统,当市电正常输入时,UPS就将市电稳压后供给负载使用,同时对机内电池充电,把能量储存在电池中,当市电中断(事故停电)或输入故障时,UPS立即将机内电池的能量转换为220 V交流电继续供负载使用,使负载维持正常工作并保护负载软硬件不受损坏. 　　……     

UPS电池供电时的上位机监控软件设计

UPS并不是单纯地持续供应电力，当市电在故障情况下，必须通知系统管理员在UPS系统中电池供电所提供的时间内采取相应的应急措施；当无人值守时，系统能自动保存重要的资讯并关闭系统。文中设计了一个UPS在电池供电时的上位机监控软件。     

有线电视前端机房UPS供电系统设计方案探讨

本文对有线电视前端机房UPS供电系统的设计方案作了探讨，并在UPS容量的确定、后备电池的配置、冗余方式的选择等方面进行论述。     

不间断电源在广播电视发射台的应用

不间断电源（Uninterrupted Power Supply,UPS）系统能够保证信号传输连续性及质量。介绍UPS系统的工作模式,分析UPS配电系统设计及后备电池设计的关键技术,阐述在线式、离线式和互动式UPS的特点及适用性,应用精确电源管理及监控系统提高整体系统效率,结合后备电池应用策略,确保UPS在主电源中断时能够可靠供电。     

有线电视网络机房UPS供电系统设计

介绍有线电视网络机房UPS供电系统的类型、工作方式、UPS容量的确定、后备电池的配置、冗余方式的选择等。     

UPS电池的配置和维护

UPS在广播电视中的应用越来越多,随着UPS主机价格的下降,电池在UPS系统购置成本中所占份额越来越高。蓄电池是UPS系统中的一个重要组成部     

中、大型UPS蓄电池监测管理和容量配置

中、大型UPS系统中蓄电池为交流不间断供电提供了能源保证。对蓄电池组进行监测管理与合理配置容量,有利于延长其寿命,保证UPS系统稳定、安全运行。本文论述了UPS系统的蓄电池监测管理的几个方面,以及蓄电池容量的合理配置计算。     

大中型UPS原理及应用中问题分析

阐述了大中型UPS的结构特点及工作原理，分析了UPS应用中的问题，论述了UPS电源规划配置，系统容量估算及专用电池组选择。     

采用小型汽油发电机对UPS供电探讨

在UPS供电系统中,市电中断时间较短时,蓄电池的直流电能经逆变器转换后给交流负载供电。但是,蓄电池的容量有限,不能长时间供电,为了保证市电长时间停电后设备能够正常工作,必须采用发电机来进一步支持UPS,共同组成UPS/发电机组的完整的不间断供电系统。对使用小型发电机为UPS供电出现的问题进行探讨,并提供实际的使用例子。     

采用小型汽油发电机对UPS供电探讨

在UPS供电系统中，市电中断时间较短时，蓄电池的直流电能经逆变器转换后给交流负载供电。但是，蓄电池的容量有限，不能长时间供电，为了保证市电长时间停电后设备能够正常工作，必须采用发电机来进一步支持UPS，共同组成UPS／发电机组的完整的不间断供电系统。对使用小型发电机为UPS供电出现的问题进行探讨，并提供实际的使用例子。     

减少核心机房UPS事故需要注意的几个问题

核心机房UPS为重要负载供电,不容忽视。文章介绍了UPS输出负载短路的后果及解决方案;结合案例说明维护中要重视零线的检查;UPS零地电压产生的原因及解决方案;UPS蓄电池安装,需要注意的问题;UPS电容爆炸的原因及解决方案,并分析了电容爆炸几种不同现象的原因。     

Performance of a single-stage UPS system for single-phasetrapezoidal-shaped AC-voltage supplies

A high-performance single-stage UPS system for single-phase AC power supply systems is presented. The topology generates a trapezoidal-shaped load voltage that is synchronized with the AC supply; therefore, a small DC-link capacitor is required. This feature leads to a high-input power factor (0.94 at nominal voltage), and due to the single-stage structure, high efficiency (93% at nominal voltage) is also achieved. Moreover, in both cases the supply current spectrum presents low-order harmonics, all of which satisfy IEC 555. The high performance is validated using both resistive (linear) and diode RC (nonlinear) loads. The dynamic performance of the UPS system is also analyzed under different transient conditions. Specifically, the supply to battery, battery to supply transition, load transient, and supply/battery-voltage transients are performed. They show a transfer time of 500 μs (from AC supply to battery) and overvoltages of at most 15%. The dynamic and static evaluations are performed on a 1 kVA UPS system. The design guidelines for the key components and control parameters are also included     

成都地铁一号线通信UPS电源系统简述

成都地铁1号线通信UPS电源系统由配电系统、UPS系统、集中监控系统、蓄电池组、接地装置构成。文中论述了该电源系统各组成部分及功能。     

A novel on-line UPS with universal filtering capabilities

A novel line-interactive uninterruptible power supply (UPS) is proposed that offers the characteristics of an “on-line” or “inverter-preferred” UPS (which incorporates a pulse-width modulation (PWM) rectifier) at a reduced cost. This new UPS is based on the combination of two full-bridge VSI converters: one in series with the input and the other in parallel with the load. The UPS acts as a line conditioner and output-voltage stabilizer in the presence of input power while charging the battery at a controlled rate. In case of loss of input power, the UPS can make a seamless transition to backup mode while supplying the load with a controlled sinusoidal voltage, drawing power from the battery. The series converter sees only a small percentage of the input voltage (typically, 10%-20%) while carrying the input current and therefore has a small kilovoltampere rating. The parallel converter supplies the load during blackout and hence determines the total kilovoltampere rating of the UPS. The reduced kilovoltampere rating of the series converter results in reduced system cost compared to conventional on-line systems without sacrificing any desirable characteristics. A laboratory version of the proposed UPS has been built to demonstrate the claimed capabilities, and both simulation and experimental results are included in the paper     

Feasible high-performance uninterruptible power supply incorporating current-mode controlled two-quadrant chopper-fed battery link

This paper presents a single-phase input-output common bus line uninterruptible power supply (UPS) circuit topology using a six-in-one insulated gate bipolar transistor (IGBT) module which incorporates a bidirectional chopper-linked battery bank with specific current-mode control strategy. The steady-state operating principle of this UPS topology and its new control strategy are described, together with conventional UPS. The experimental results of the cost-effective and high-performance small-scale UPS topology with a two-quadrant chopper-fed battery link are illustrated for the developed 3 kV A UPS and discussed, in comparison with conventional UPS topologies, from a practical point of view.