通信直流配电系统中高阻配电应用分析

介绍了通信直流配电系统中高阻配电的定义、优点和存在的问题,对三级配电系统下高阻配电的应用进行了理论计算和分析,并对多级高阻配电应用的可行性进行了分析和探讨。

电源系统可靠性和高阻配电

简述了整流模块、并联冗余的整流器列架电源及直流不停电电源系统的可靠性预计,进而引伸到分散供电及高阻配电的意义及作用。

配电网高阻接地故障识别定位技术在城市配电系统中的应用研究

本文着重研究了高阻接地故障识别定位的关键技术,并将其应用于城市配电系统中。首先,分析了配电网高阻接地故障的主要特点和识别难点,对比了当前常见的阻抗、电阻比、波形识别等定位方法的优缺点。然后提出一种结合电流振荡捕捉、交叉相关分析和模糊聚类的高阻接地故障识别定位方法。结果表明该技术能够在0.1s内实现故障的快速准确识别,故障定位精度达到了±5%以内,大大提升了城市配电系统的运行质量和服务水平。最后针对当前城市配电系统的特点和需求,对该技术在城市配电系统中的应用前景和改进方向进行了展望,为进一步提升我国城市配电系统的运行效率和稳定性提供了理论依据和技术手段。

通信电源系统中的直流配电

文中介绍通信电源系统中直流配电的作用及其主要的配电方式——低阻配电和高阻配电的原理,重点说明了高阻配电的使用条件,并通过计算分析和应用实例说明了高阻配电的优越性。

浅析煤矿配电网中性点接地

伴随我国煤矿配电网技术的发展,诸如济三煤矿等大型矿井的配电网已由老式的以架空线路为主的布局,逐渐转变为以电缆为主的新型网路。并且,大量紧凑型的配电设备(如SF6集成断路器、紧凑封装刀闸的真空断路器)、铠装聚乙烯电缆及高性能氧化锌避雷器的广泛使用,使原有的接地方式,已不能满足当前矿井配电网系统的需要。

直流供电系统的分类

介绍直流供电系统的分类及如何根据不同类型的通信局(站)配置相应的直流供电系统。

High-resistance controlled yielding supporting technique in deep-well oil shale roadways

In order to avoid the deep-well oil shale roadway being deformed, damaged, or difficult to maintain after excavating and supporting in Haishiwan coal mine, this paper has analyzed the characteristics of the deformed roadway and revealed its failure mechanism by taking comprehensively the methods of field geological investigation, displacement monitoring of surrounding rock, rock properties and hydration properties experiments and field application tests. Based on this work, the high-resistance controlled yielding supporting principle is proposed, which is： to ＂resist＂ by high pre-tightening force and high stiff- ness in the early stage, to ＂yield＂ by making use of the controlled deformation of a yielding tube in the middle stage, and to ＂fix＂ by applying total-section Gunite in the later stage. A high-resistance controlled yielding supporting technique of ＂high pre-tightening force yielding anchor bolt ＋ small-bore pre-tight- ening force anchor cable ＋ rebar ladder beam ＋ rhombic metal mesh ＋ lagging gunite＂ has been estab- lished, and industrial on site testing implemented. The practical results show that the high-resistance controlled yielding supporting technique can effectively control the large deformation and long-time rheology of deep-well oil shale roadways and can provide beneficial references for the maintenance of other con-generic roadways.Deep-well Oil shale

通信电源系统中的直流配电

本文介绍通信电源系统中直流配电的作用及其主要的配电方式——低阻配电和高阻配电的原理,重点说明了高阻配电的使用条件,并通过计算分析和应用实例说明了高阻配电的优越性。