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通过对黄河防汛专用通信网微波通信站遭受雷击电磁脉冲侵入的主要途径和所存在的防雷安全隐患进行分析,提出了雷电防护接地系统设计方案与具体防护措旌。 相似文献
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《中国新技术新产品》2017,(12)
夏季雷雨多发季节,电力通信系统很容易遭遇雷击损害,导致系统被损坏,因此电力通信自动化系统在运行过程中必须要加强防雷及接地保护,本文主要电力自动化系统可能会遭遇的雷电损害的形式及防雷接地保护方法进行简单的讨论分析。 相似文献
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对监控系统而言,雷电防护是一项很重要的工作,本文通过雷电对监控系统的危害及雷电入侵监控系统的途径的分析,探讨了如何对监控系统中的前端设备、传输线路及监控设备终端等环节进行雷电防护,对雷电防护中的接地技术也作了详细地介绍。 相似文献
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铁路段信号设备防雷整治探讨 总被引:1,自引:0,他引:1
从铁路信号设备和雷电放电特点,分析雷电对铁路信号设备的危害。并从接地网络结构、避雷针的选用、电路材质选择和设备防干扰等方面分析防雷措施的设计,并提出防雷设计与施工应共同提高,才能提高设备的防雷能力。 相似文献
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本文针对以裸导线为主的10kV配电线路进行实际运行情况研究,分析了雷电对配电线路的危害。对常规的避雷器、降低接地电阻等防雷措施进行分析,由分析结果提出防雷措施的适用场合。 相似文献
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于尧 《中国新技术新产品》2019,(5)
该文从雷电的危害出发,介绍了建筑物雷电防护的等级和防护区的划分等常识,分析了生活、工作中常见的建筑,对常用防雷接地设备和材料进行简要分析,对比经济、高效、合理、安全的设计方式方法,对一些常见问题进行简要分析,希望可以对设计工作者提供一些参考。 相似文献
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本文通过对几次汽车加油站遭受雷击事故原因分析,根据其特点对加油棚、油罐及附属建筑的直击雷防护和接地,加油站电源、信号系统的雷电防护等,依据GB50057、IEC61312标准对雷电防护的要求,提出了系统的解决方案。 相似文献
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Turner DJ 《Philosophical transactions. Series A, Mathematical, physical, and engineering sciences》2002,360(1790):107-152
All the apparent anomalies in ball lightning behaviour seem to result from electrochemical processes which arise at the surface of a wet air plasma. The structure and stability of an established lightning ball are maintained by these processes and the ball operates as a thermochemical heat pump powered by the electric field of a thunderstorm. Movements result from asymmetries in the various fields which control the structure. In addition to electric, electromagnetic and gravitational fields, temperature, pressure and compositional gradients can be involved. Electrochemistry provides a framework within which specific properties can be considered using better developed or more appropriate disciplines. Several commonly made assumptions and approximations are identified which can be invalid under the specific conditions which favour ball lightning stability. If any of these limitations is ignored, seriously misleading conclusions may result. The range of power associated with lightning balls is ill defined but may vary continuously between that of globes which lack a bright centre and that of normal lightning. Our failure to contain plasmas electrochemically for more than a few seconds probably reflects our inability to balance (or even measure) the various fields which govern a ball's stability. All the fields may need to be controlled before electrochemistry can usefully be employed to contain plasmas. 相似文献
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P. P. Ivanov 《High Temperature》2016,54(1):118-123
In developing technologies of ultrafast (within 5 min) electric vehicle charging, problems occur related to the power supply. The charging station, an analog of a refueling station, should have an extremely irregular load with a high peak power. It might be located far from the possible point of connection to the power grid and should represent an object of decentralized power generation by means of an electrical energy storage system. We consider and compare an autonomous gas-turbine facility and a lead-acid battery as the possible power supply. We found an averaged statistically optimal relation between the gas turbine power (or the contracted power) and the battery capacity providing for minimum expenses, reduced to the service life, for creation and exploitation of the station of ultrafast charging of a given number of electric vehicles per day. 相似文献
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本文阐述了我国在仪控电系统和设备领域的核电标准建设的现状,对我国在这一领域标准的数量、涉及方向、功能特点进行了分析,简要介绍了美国和IEC在与核电安全相关仪控电系统和设备领域标准的现状及各个标准体系的特点,比较了我国与其他国家和组织在标准建设方面的差距,指明了我国在这一领域的不足之处。 相似文献
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《IEEE transactions on magnetics》1993,29(2)
The following topics were dealt with: formulations/methodology; biomedical applications; power devices; edge elements; boundary elements/integral methods; materials; electroheating; waveguides and cavities; scattering and microwave fields; strip lines; finite elements and electric circuits; time domain simulation; transients; inverse problems and optimisation; boundary conditions; lightning; nondestructive evaluation; eddy currents; meshes; software; neural networks; knowledge engineering; nonlinear and iterative problems; postprocessing; force computation; radiation; electric field problems; and magnetic fields 相似文献