共查询到20条相似文献，搜索用时 156 毫秒
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高压电气设备抗震可靠性分析方法 总被引：9，自引：2，他引：7
提出了基于反应谱理论的高压电气设备抗震可靠性分析模型与计算方法。利用极大值分布理论反映地震动的随机过程特性,结合一次二阶矩阵理论建立了可以同时反映地震动变异特性与高压电气设备材料变异特性的高压电气设备抗震可靠性分析方法。应用这一方法,可以系统地进行高压电气设备的抗震可靠性分析,计算出高压电气设备在不同烈度、不同场地条件下的抗震可靠性指标与可靠概率。所得结果可为高压电气设备抗震性能评价与电力系统抗震 相似文献
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高压变电站抗震可靠性分析(一) 总被引：9，自引：2，他引：7
讨论了高压变电站中电气主接线系统的抗震可靠性分析问题,主要分析了高压变电站中常见的双母线系统的抗震可靠性。通过系统的可靠性关系和建立系统的可靠性分析准则,给出了双母线系统在各个抗震准则条件下的可靠性的表达形式。最后进行了实例分析。 相似文献
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高压变电站抗震-可靠性分析(二) 总被引：4，自引：0，他引：4
在双母线系统抗震可靠性分析的基础上,进一步讲座了高为电站另一种重要接线形式－双母线带旁路母线接线系统的抗震可靠性分析问题,针对双母线带旁路母线接线系统具有储备系统的特点,建立了具有备用系统情形的抗震可靠性分析方法,同时给出了在各个抗震可靠性分析准则条件下接线系统的抗震可靠性。 相似文献
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考虑失效相关的电力系统抗震可靠性研究 总被引：3，自引：0，他引：3
本文根据电力系统的特点,对发电厂和供电系统分别提出了不同的系统可靠性模型,并对各单体之间失效的相关性也进行了较深入的探讨,同时编制了计算系统抗震可靠性的Ｍｏｎｔｅ Ｃａｒｌｏ法程序。 相似文献
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杨文忠 《地震工程与工程振动》2006,26(3):184-185
1976年的大地震,使唐山的生命线系统遭到极其严重的破坏。震后,生命线系统迅速恢复,特别是通讯、供水、电力、铁路、公路的恢复。这些对救灾工作的开展至关重要。 相似文献
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A SYSTEM OF CAPACITIVE HIGH-VOLTAGE PULSE RECHARGE/DISCHARGE AND ITS IMPLICATION ON EXPERIMENTALLY TRIGGERED EARTHQUAKE 
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下载免费PDF全文 An external small disturbance may trigger seismic events when the fault is in a critical state. The problems related with earthquakes triggered by the dynamic stress such as blasting loads, impact loads, volcanic eruptions and strong earthquakes, have usually drawn wide concerns in earthquake science, and the corresponding research contents are quite extensive, including earthquake triggering mechanisms, triggering earthquake uncertainty, aftershock triggering, and so on. Among them, experimental research is an important way to understand the stress triggering conditions and physical mechanisms, such as the influence of load disturbance on fault friction traits, the influence of periodic disturbance of tidal stress on fault instability, etc., all of which can be gained through experimental investigations. Among them, "how to trigger" is a basic scientific problem to increase the understanding of earthquake prediction theory, thus receiving more attention. There are also some studies that focus on "what happened after the trigger", that is, the sliding instability generated by the triggering method, and then the evolution characteristics of the sliding instability process. The well-known experimental study of the super-shear rupture process is conducted by using the electric explosion method to trigger the fault instability, and the high-speed camera records the super-shear rupture during the fault instability. This means that when the trigger source is controllable, it is possible to generate different types of instability processes, and then to explore which earthquakes will be triggered at different time and space positions under different stress states by means of active triggering. The study of stability analysis and instability process has important scientific significance.A stable system of capacitive high-voltage pulse discharge and recharge is one of basic techniques for studying the triggered earthquakes in laboratory. Based on the wire electric explosion method, this paper develops a controllable trigger experiment system. By designing a new capacitive high-voltage pulse charge and discharge system, while considering the actual needs of monitoring and system timing, multiple functions are integrated into one system. Functionally, in addition to realizing the dynamic loading and unloading function of the wire electric explosion method, the discharge process can be monitored, and the triggering, synchronization and timing signal output is performed with other observation systems, thus realizing the whole process monitoring of the dynamic disturbance action. After testing, the following functions are achieved:1)The voltage and current of the high-voltage charging power supply system can be automatically adjusted, and the system can be shut off after charging; 2)Control modes include manual and remote controls. These two modes can control the recharge, release and pulse discharge of the high voltage capacitor; 3)The system can produce multi-channel synchronous output, which satisfy multiple systems working together. In particular, the remote sensing method greatly improves the experimental maneuverability and security; 4)The system has multiple sets of gas discharge tube to trigger discharge, with a wide range of discharge voltage of 500~5 000V; 5)Roche coil resistance integral current detection can meet the transient resistance, large current detection. Test results indicate that this system has good repeatability and stability with the same discharge energy and discharge energy regulator, which is conducive to carry out single channel trigger of high-pressure discharge experiment. In short, the new charging and discharging system can meet the requirements of experimental study of triggering earthquake. In addition, this system can be used to generate the stress disturbance under certain static and dynamic conditions, and then judge whether this kind of mechanical conditions in active fault systems is currently stable.In short, a controllable single-shot discharge system is developed by a capacitive high-voltage pulse discharge system, which provides a good technical basis for experimental research on triggering earthquakes. In addition, the new system also has application significance:1)multiple triggering output can simultaneously start multiple systems and improve the efficiency of observation. Fault instability is a characteristic of transient response, so, its observation requires high-speed acquisition equipment, which is difficult to control on observation; the trigger system is controllable, with active synchronization observation using physical parameters; 2)stress disturbance can be triggered under static and dynamic loads to detect the safety and stability of the fault system with active trigger. 相似文献
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简要介绍强震动观测和地震预警技术及其在核电站工程中的应用情况.基于有关导则相关要求的介绍,对核电站强震观测系统的一般要求进行说明,分别以Beznau核电站和我国某核电站为例,介绍了强震仪测点的布置情况.以立陶宛Ignalina核电站为例,对地震预警技术在核电站中的应用情况做了分析和探讨.最后,提出了今后核电站地震观测和地震预警中值得关注的有关问题. 相似文献
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YONG CHEN GE PING LI QI FU CHEN LING CHEN MIN FENG LI Center for Analysis Prediction China Seismological Bureau Beijing China 《地震学报(英文版)》1998,11(6):751-758
ＩｎｔｒｏｄｕｃｔｉｏｎＡｓｅｓｉｎｇｔｈｅｐｏｔｅｎｔｉａｌｅａｒｔｈｑｕａｋｅｄａｍａｇｅａｎｄｌｏｓｉｎａｒｅｇｉｏｎｉｓｉｍｐｏｒｔａｎｔｆｏｒｍａｎｙａｓｐｅｃｔｓ,ｓｕｃｈａｓｒｉｓｋｍｉｔｉｇａｔｉｏｎ,ｒｅｓｏｕｒｃｅｓａｌｏｃａｔ... 相似文献
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本文研究了电力供应系统地震功能失效评估方法,尤其对电力供应系统功能潮流分析方法与负荷的控制问题作了深入的探讨.不仅分析了供电系统的潮流(包括电压和功率)变化对供电系统的影响问题,而且建立了电流控制模型,利用DSEA控制算法对供电系统进行负荷控制,并在此基础上进行了系统过负荷时的数值模拟研究;另外,通过一实例分析,对本文的研究方法进行了验证,从而为供电系统抗震分析、功能评估及灾害预防提供理论基础. 相似文献
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M. B. Barannik A. N. Danilin B. V. Efimov V. V. Kolobov P. I. Prokopchuk V. N. Selivanov Yu. A. Kopytenko A. A. Zhamaletdinov 《Seismic Instruments》2010,46(3):207-212
The high-voltage rectifier is described developed for the Energy-2 generator, with a capacity of 200 kW in which a step-up
power transformer is used as a converter. The Energy-2 generator is intended for solving problems of precision deep electromagnetic
monitoring of seismoactive regions of the Earth’s crust to find earthquake precursors. Theoretical investigation and numerical
simulation of the high-voltage rectifier are carried out and parameters of its elemental base are optimized. All the high-voltage
rectifier components, heat sink, and forced cooling system were manufactured on the basis of the developed documentation.
The high-voltage rectifier was successfully tested as part of the“Energy-2 generator in August 2009 during the “FENIKS-2009”
experiment. 相似文献
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This study investigates an electric‐type active mass driver (AMD) system for structural vibration control. Composed primarily of an electric servomotor and a ball screw, the electrical AMD system is free from noise problems, oil leakage, and labor‐intensive maintenance that commonly are associated with hydraulic AMD systems. The desired stroke amplification of the mass and the power demand of the servomotor can be adjusted via the ball screw pitch, which in turn affects the effectiveness and efficiency of the system. Meanwhile, an instantaneous optimal direct output feedback control algorithm is adopted. Numerical simulation is performed using a five‐story steel frame as the object structure under the conditions of the 1940 El Centro earthquake. The AMD system proves to be effective and efficient within a certain range of the ball screw pitch. The reductions of the peak responses can reach as high as 70% if properly designed. Requiring only the velocity measurement of the top floor for on‐line feedback control, the proposed control algorithm is recommended for practical implementation. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献