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信号电源系统作为信号系统的核心设备之一,其安全性、可靠性与地铁安全运营、行车效率关系密切.信号电源系统除了为信号设备提供稳定、可靠的电源,还要有合理的监控体系,为信号人员快速处理电源故障提供重要的依据.本文提出了信号电源系统的配置方案,阐述了电源系统配置原则及计算依据. 相似文献
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信号系统是城市轨道交通的重要组成部分,是控制列车安全运行的系统,其对供电系统的稳定性和可靠性要求极高.信号系统的电源设备包括智能电源屏(含稳压器)、不间断电源系统(Uninterruptable Power System,UPS)设备以及蓄电池组等,通过该套电源系统可以向信号系统室内设备和室外设备提供不间断的稳定电源.... 相似文献
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地铁信号系统是控制列车安全运行的系统,信号系统的电源设备包括信号电源屏(含两路输入电源切换装置)、UPS(不间断电源)和蓄电池组,向信号系统室内控制设备及室外设备不间断地提供所需种类的高品质纯净电源.文中主要对信号电源屏、UPS原理以及监控的组网方式进行分析,提出了地铁信号系统电源设备的配置方案,探讨了电源设备配置过程中应注意的问题,为地铁信号系统电源配置提供参考. 相似文献
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随着时代的不断发展,地铁已经成为了人们日常生活出行必不可少的交通工具,地铁信号电源子系统作为整个地铁项目最重要的组成部分,与地铁形成安全有着直接的联系,地铁信号电源子系统还能够提高地铁线路区间,提升地铁运营效益.本文就地铁信号电源子系统配置方案及优化建议进行分析,并提出合理的建议. 相似文献
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通信电源系统是地铁通信专业中的重要系统之一,主要由蓄电池、UPS以及高频开关组成.当外部供电故障时,通信电源系统可以依靠蓄电池组临时为通信设备供电,提供2 h的后备电源.因此,对于通信专业来说,通信电源系统的作用很大.基于此,结合大连地铁通信电源系统的具体情况,详细探讨大连地铁通信电源系统组成方案,为后续进一步提升通信... 相似文献
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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。 相似文献
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从地铁通信电源系统安全运行机理追踪途径出发,针对电源设备运行阶段中可能产生的故障状况进行验证分析,配合安全控制体制对交流配电屏结构进行安全切换处理,主动规划关于UPS、高频开关电源以及蓄电池的总体控制要点以及涉外环境的稳定职责,进一步满足对通信电源系统故障预防和管制目标元素优化要求。 相似文献
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文章从通信行业动力机房的系统建设所遇到的实际问题出发,结合通信行业客户对动力电源的一些实际应用需求,逐一给出设计方案的说明。 相似文献
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The reactive power problem will become intensified in the future with the increasing use of EHV overhead lines and high-voltage cable in densely populated areas. Generators alone, with their underexcited limitations during light load periods, may not have sufficient capability to control voltages in some systems in which substantial amounts of high-voltage cable are used. Turbine generators with automatic voltage regulators, however, can be operated successfully in the underexcited region to minimize the problem of excessive system capacitive reactive loading. Although shunt reactors are an effective solution, economics may suggest other methods. Nevertheless, shunt reactors are helpful in controlling voltage during a system-start-up. Finally, more experience with the daily switching of 138-kV and 345-kV circuit breakers is necessary before definite conclusions can be drawn as to the advisability of operating them so frequently. 相似文献
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随着列车运行速度的不断提高,以及车-地信息量的越来越大,仅依靠轨道电路传输信息至车我设备的住院方式,已经不能满足列车安全、高速行驶的要求.郑-西客专CTCS-3(CTCS-2)列控系统,通过设在两条钢轨固定点的有源应答器和无源应答器向列控车栽设备传递大量的固定信息和可变信息.这种方式与轨道电路相比,不仅信息量大,而且安全可靠.应答器作为信息传递的主要元件,对其作用、性能的分析,对于正确使用应答器,保证列车运行安全至关重要.所以,应答器在高速铁路中被普遍应用. 相似文献
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Advanced signal processing for power line communications 总被引:4,自引:0,他引:4
In this article, signal processing techniques to combat the adverse communications environment on power lines are addressed, so as to enable reliable high speed data communications over low-voltage power distribution networks for Internet access and in-home/office networking. It is seen that multicarrier code-division multiple access, multiuser detection, and turbo decoding, having demonstrated their limit-approaching capacity in DSL and wireless communication systems, are readily applied to power line communications. In particular, it is argued that these methods can successfully mitigate the influence of the principal impairments in PLC channels: time-varying channel attenuation, multipath frequency-selective fading, multiple access interference, and background noise. Strategies to deal with the most unfavorable noise source, the impulse noise, are also discussed. 相似文献
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In this work, we investigate the transmission of outdoor power line communication (PLC) in the power electric network. For this purpose, we propose an efficient and accurate modeling of the propagation of PLC signal through a power transformer using bond graph theory. Electrical energy is a univocally measurable physical quantity which is not the case of the voltage and the current. The analysis by bond graph where theoretical concept is based on energy and its conservation appear to be the most appropriate for modeling the transmission of low level PLC signals. To demonstrate this advantage, we treat an application on a power transformer and we compare our results to the measure and those obtained by another method of calculation. 相似文献
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对TD—SCDMA系统UTRAN信令的监测提出解决方案,通过深入研究并设计一款网络信令测试仪系统,实现UTRAN相关接口信令的监测。 相似文献