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2.5,3 UPS电源系统设计选择方法 2.5.3.1 UPS电源系统结构 (1)系统结构的种类 UPS电源运行的方式有单机UPS、并联UPS与冗余并联UPS等,其中增设旁路供电就可构成各种类型的系统。并联方式是几台单机UPS并联运行的方式,它是增大电源功率的一种方法。冗余并联方式是并联运行中1台UPS工作,另一台作为备用 相似文献
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随着UPS电源在广电系统的广泛应用,UPS电源后备蓄电池的维护重要性不容忽视,本文介绍了UPS蓄电池维护的必要性和维护方法. 相似文献
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铅酸蓄电池在UPS(不间断电源)系统中占有十分重要的地位,若维护不当,则会导致UPS达不到电源后备的目的。从蓄电池的结构、工作原理进行介绍,详述了蓄电池的电压、内阻、容量、寿命等特性,提出了蓄电池维护的基本要求、充放电管理,以及UPS蓄电池容量配置方法。 相似文献
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1 引言优质可靠的后备电源是高质量通信及供电系统安全生产的重要保证。蓄电池是一种良好的直流电源,具有电压稳定、无脉动成分、使用方便可靠等优点。蓄电池与供电主要设备——整流器的并联运行,可改善整流器的供电质量;在突然停电及整流器不工作的状态下,蓄电池可作为后备电源迅速投入使用,从而保证通信设备的正常工作。因此,蓄电池的维护是动力设备维护的主要任务。阀控式密封蓄电池(VRLA)虽日常维护 相似文献
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不停电电源系统(uninterruptible power system)简称UPS,它能提供高供电质量和连续不间断地可靠供电,以适应现代化重要设备需要。图1是一种常用的直流不停电电源系统,如船舶电网蓄电池充放电装置即是其中的一种,它输出24 V直流,负载为舵机、应急照明、应急消防泵和通信导航设备等。在正常情况下,电网经整流、调压、滤波后,一方面向负载供电,一方面对蓄电池组并联浮充;当电网失电后,由蓄电池组向负载供电。这是一种并联浮充 相似文献
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蓄电池在供电系统中主要是作为储能设备,当外部交流供电突然中断时,作为系统供电的后备保护.为通信设备的正常工作提供保障。在我站的-48V直流供电系统中,两组蓄电池组可提供大约40小时的不停电供电电源,在交流不间断供电系统(UPS)中,蓄电池可提供5小时的不间断供电电源,以维持正常的通信。 相似文献
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磁悬浮飞轮储能设备是指在磁悬浮真空环境下通过高速运转的飞轮来储存能量的装置,具有能耗低、无污染和寿命长等优点,在后备油机及高低压配电系统能快速响应的前提下可完全替代铅酸蓄电池作为UPS系统的新型后备电源。目前,该技术及产品在国外大型数据中心应用广泛,但在国内还比较少见。随着我国通信行业特别是数据中心节能减排问题提上日程,飞轮储能设备将在中国数据中心建设中大显身手。文中通过搭建一套由后备油机、高低压配电设备、UPS主机、飞轮设备及假负载组成的供电系统进行实地联动测试,并分析了在UPS供电系统中利用飞轮设备替代铅酸蓄电池的可行性,最后给出了该技术和产品在中国推广应用的一些建议。 相似文献
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Kwok-Wai Ma Yim-Shu Lee 《Power Electronics, IEEE Transactions on》1996,11(2):318-327
An integrated flyback power converter performing the combined functions of uninterruptible power supply (UPS) and switch-mode power supply (SMPS) is presented. This power converter has a high voltage main power input and a low voltage backup battery input. DC output is obtained from the main input via a flyback power converter during normal operation and from the backup battery via another flyback power converter when input power fails. High conversion efficiency is achieved in normal, backup, and charging modes as there is only a single DC-DC conversion in each mode. The power converter circuit is very simple, with two switching transistors, a relay for mode switching, and a single magnetic structure only. This new design offers substantial improvement in efficiency, size, and cost over the conventional cascade of UPS and SMPS due to single voltage conversion, high frequency switching, and removal of design redundancy. The operation, design, analysis, and experimental results of the power converter are presented 相似文献
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Bong-Hwan Kwon Jin-Ha Choi Tae-Won Kim 《Industrial Electronics, IEEE Transactions on》2001,48(4):804-811
An improved single-phase line-interactive uninterruptible power supply (UPS) is proposed for low-power applications with low cost. The proposed UPS is comprised of two push-pull converters based on a low-voltage battery for reduced cost: one in series with the input and the other in parallel with the load. In the presence of input power, the UPS acts as an output voltage regulator and at the same time as an active filter while charging the battery. In case of loss of input power, the UPS supplies a regulated sinusoidal voltage to the load, drawing power from the battery. The series converter compensates only a small percentage of the input voltage carrying the input current and, therefore, a reduced rating is made. The parallel converter always supplies a nominal voltage and makes a seamless transition to backup mode. In the voltage determination of the parallel converter, the nominal voltage is derived using the feedback linearization concept and then a perturbed voltage is determined for the reactive power control or output voltage regulation. Experimental results obtained from a 1-kVA prototype are discussed 相似文献
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A novel on-line UPS with universal filtering capabilities 总被引:10,自引:0,他引:10
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 相似文献
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十堰电视台根据广电总局要求,从实际情况出发,设计了一套安全可靠的供电系统.详细介绍了这套供电系统设计要求、双路供电系统自动和手动倒换系统设计、UPS电源系统设计和供电系统维护管理经验等.实际使用证明了这套双回路电源自动切换系统设计简单、安全可靠. 相似文献
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基于PIC的后备式UPS的实现 总被引:1,自引:0,他引:1
介绍了PIC16C73B单片机和它的特点。分析了后备式UPS的基本原理。并结合PIC16C73B给出了一种后备式UPS实现的实例。文章对后备式UPS设计中的关键参数及其处理方法进行了详细介绍。并且根据硬件设计框图,具体分析了后备式UPS的逆变过程和相关的软件编程。 相似文献
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本文介绍了UPS串联备份,并联备份的方式和它们的优缺点,并根据UPS目前的技术水平,提出了工程选用备份模式的建议。 相似文献
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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。 相似文献
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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。 相似文献