发布求助
文献互助 智能选刊 最新文献

2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum最新文献

筛选
英文 中文
Capacitor bank switching with vacuum circuit breakers 带真空断路器的电容器组开关
2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2008-12-01 DOI: 10.1109/CICED.2008.5211640
H. Schellekens
{"title":"Capacitor bank switching with vacuum circuit breakers","authors":"H. Schellekens","doi":"10.1109/CICED.2008.5211640","DOIUrl":"https://doi.org/10.1109/CICED.2008.5211640","url":null,"abstract":"After interruption of a capacitive current sometimes Non Sustained Disruptive Discharges (NSDDpsilas) are observed when using vacuum circuit breakers. According to network calculations, NSDDpsilas generate significant over-voltage on the terminal of the capacitor bank to earth and across the circuit breaker (CB) terminals. In a full scale experiment at 12 kV on an 8 MVAr capacitor bank artificial NSDDpsilas are produced using a TVG. The over-voltage depends on the momentary voltage difference across the breaker and, hence, varies with the phase angle. The over-voltage on the terminal of the capacitor bank to earth varies from 1.5 to 4.2 pu, and to maximum 5.2 pu. across the CB terminals. The effectiveness of surge arresters on the limitation of the over-voltages is measured. The over-voltages are limited to 2.2 pu. on the terminals of the capacitor bank to earth and 3.2 pu. across the CB terminals. A single surge arrester on the neutral point of the capacitor bank yields the same level of protection and, therefore, is a cost effective alternative.","PeriodicalId":138741,"journal":{"name":"2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134537799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Influences of preparation technology on the flashover characteristics of machinable ceramics in vacuum 制备工艺对真空可加工陶瓷闪络特性的影响
2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2008-11-18 DOI: 10.1109/DEIV.2008.4676864
Guo-qing Liu, Kai-kun Yu, J. Tian, Guanjun Zhang
{"title":"Influences of preparation technology on the flashover characteristics of machinable ceramics in vacuum","authors":"Guo-qing Liu, Kai-kun Yu, J. Tian, Guanjun Zhang","doi":"10.1109/DEIV.2008.4676864","DOIUrl":"https://doi.org/10.1109/DEIV.2008.4676864","url":null,"abstract":"This paper probes into the influences of preparation technology, mainly crystallization time, on the flashover characteristics of machinable ceramics under 0.4/2.5 mus impulse voltage in vacuum. Several machinable ceramic samples are prepared with the same procedure under different crystallization time. To study the association between crystallization time and flashover characteristics, the surface microstructures of samples are observed by SEM, while the surface electric strength of each sample is tested by flashover experiments in vacuum. It is revealed that the flashover characteristics vary with their crystallization time, and the sample with less crystallization time has a better flashover performance. From the SEM analysis of the samples, the crystallization time of machinable ceramic can affect its microstructure. The longer crystallization time is, the bigger grains will grow. And this will contribute to an influence on the flashover performance of machinable ceramics.","PeriodicalId":138741,"journal":{"name":"2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121338137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Model of charged particle and plasma beam interaction with structural materials 带电粒子和等离子体束与结构材料相互作用的模型
2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2008-11-18 DOI: 10.1109/DEIV.2008.4676833
G. Kostyuk, E. Voliak
{"title":"Model of charged particle and plasma beam interaction with structural materials","authors":"G. Kostyuk, E. Voliak","doi":"10.1109/DEIV.2008.4676833","DOIUrl":"https://doi.org/10.1109/DEIV.2008.4676833","url":null,"abstract":"The interaction of streams of charged particles and plasma streams with structural materials is connected with implementation of the wide range of processes: collisional, thermophysical, thermomecanical, thermal fatigue, diffusive, thermo-chemical and plasma-chemical. Now there are works taking into account these factors and, especially, their interrelation. All these processes influence both character of heat exchange in bulk targets, and on a surface, therefore registration of these processes is indispensable as in an energy balance in elementary size of the metal target, and in heat exchange on a target surface, i.e. in boundary conditions. The analysis of the lead explorations of temperature fields and voltages, and also effective factor of erosion allows making following outputs: The temperature fields reach maximal values for electrons near depths equal to the run of an electron, and for ions near depths equal to half of the path of the ion. The temperature stresses reach maximal values at energies 103 to 104 eV for ions and 104 to 105 eV for electrons and for a case of action of individual ions. Conditions for cluster shattering and for ions in this case are realized, whereas for electrons such shattering is improbable for the base structural materials.","PeriodicalId":138741,"journal":{"name":"2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"02 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127272846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis and numerical simulation of secondary electron emission of an insulator submitted to an electron beam 电子束作用下绝缘体二次电子发射的分析与数值模拟
2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2008-11-18 DOI: 10.1109/DEIV.2008.4676707
A. Aoufi, G. Damamme
{"title":"Analysis and numerical simulation of secondary electron emission of an insulator submitted to an electron beam","authors":"A. Aoufi, G. Damamme","doi":"10.1109/DEIV.2008.4676707","DOIUrl":"https://doi.org/10.1109/DEIV.2008.4676707","url":null,"abstract":"The purpose of this work is to present a new mathematical modeling, coupling electric field with electron/hole transport and describing the spatial and temporal charge trapping in an insulator submitted to an electron beam irradiation, and which computes the temporal evolution of the secondary electron emission as a function of global trapped charge. A comparison with some preliminary experimental results are encouraging.","PeriodicalId":138741,"journal":{"name":"2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126106822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Particle simulation of argon electrons in direct current discharge 直流放电中氩电子的粒子模拟
2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2008-11-18 DOI: 10.1109/DEIV.2008.4676799
Jing Li, Yundong Cao, Xiaoming Liu, Chunguang Hou
{"title":"Particle simulation of argon electrons in direct current discharge","authors":"Jing Li, Yundong Cao, Xiaoming Liu, Chunguang Hou","doi":"10.1109/DEIV.2008.4676799","DOIUrl":"https://doi.org/10.1109/DEIV.2008.4676799","url":null,"abstract":"A microscopic model is based in our study which adopted the particle-in-cell and Monte Carlo methods to simulate the behavior of the electrons at the beginning of the discharge. The distance between the plane electrodes in our study is 64 mm. The gas temperature is 300 K and the DC voltage applied to the electrode is 1000 V. We trace the motions of a large amount of the electrons and assembled average which makes us acquire the macroscopic energy distributions. The elastic collision, ionization and electronic excitation between electrons and neutral atoms are considered here and at the same time the relationships between the energy and cross section of the electrons are also considered here. According to our study, the energy distributions of the electrons and the impacts of the pressure are acquired. The phenomena that the electrons with low energy are absorbed by the electrodes at the beginning of the discharge and the multiplication of the high energy electrons by the function of the electric field can also be explained well.","PeriodicalId":138741,"journal":{"name":"2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123307525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Method of improving cathode surface 改善阴极表面的方法
2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2008-11-18 DOI: 10.1109/DEIV.2008.4676757
A. Emelyanov, E. Emelyanova
{"title":"Method of improving cathode surface","authors":"A. Emelyanov, E. Emelyanova","doi":"10.1109/DEIV.2008.4676757","DOIUrl":"https://doi.org/10.1109/DEIV.2008.4676757","url":null,"abstract":"The method of operated processing of cathode surface in vacuum has been offered. The control has been realized in steady-state conditions by electric intensity amplification factor beta at cathode micro heterogeneities. High-voltage pulses of nanosecond range at amplitudes providing the breakdown delay time equal to the duration of appurtenant pulse td = tp have been used as an effect. The method permits to up-grade appreciably the cathode surface with low pulse number. As a result of influence of five pulses with tp = 10 ns at amplitudes providing the equality of td = tp upon stainless steel electrodes with area of S ap 1 cm2 the amplification factor has been reduced more than in five times from beta = 136 to beta = 26.","PeriodicalId":138741,"journal":{"name":"2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123551944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the discharge parameters of a glow mode DBD 辉光模式DBD放电参数的研究
2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2008-11-18 DOI: 10.1109/DEIV.2008.4676875
G. Rusu, A. Nastuta, A. Chiper, G. Popa
{"title":"On the discharge parameters of a glow mode DBD","authors":"G. Rusu, A. Nastuta, A. Chiper, G. Popa","doi":"10.1109/DEIV.2008.4676875","DOIUrl":"https://doi.org/10.1109/DEIV.2008.4676875","url":null,"abstract":"In this paper we report on the behavior of a glow mode pulsed barrier discharge working at different gas pressure (25-760 Torr) in He and He+O2. The experimental set-up consists of a plane-parallel geometry of DBD system, excited by positive monopolar voltage pulses. The discharge properties were characterized by electrical measurements and emission spectroscopy. Our investigations showed that the discharge consists of two current pulses, with different polarities, corresponding to each voltage pulse. The main results referred to the effect of pressure and oxygen percentage on the discharge parameters. The temporally resolved spectroscopy of the DBD plasma working at different pressure pointed out the differences between the discharge mechanism at low pressure and that closed to atmospheric pressure. At low pressure (25 Torr), the oxygen atoms are efficiently created for about 2% of oxygen added to gas mixture.","PeriodicalId":138741,"journal":{"name":"2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123513251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Two-dimensional transient magneto-hydrodynamic modeling of vacuum arc 真空电弧二维瞬态磁流体动力学建模
2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2008-11-18 DOI: 10.1109/DEIV.2008.4676819
Ling Zhang, Lijun Wang, S. Jia, Dingge Yang, Z. Shi
{"title":"Two-dimensional transient magneto-hydrodynamic modeling of vacuum arc","authors":"Ling Zhang, Lijun Wang, S. Jia, Dingge Yang, Z. Shi","doi":"10.1109/DEIV.2008.4676819","DOIUrl":"https://doi.org/10.1109/DEIV.2008.4676819","url":null,"abstract":"Based on a magnetohydrodynamic (MHD) model, a two-dimensional transient MHD model of a vacuum arc was developed. In this model, the unsteady terms in mass, momentum, and energy conservation equations, Maxwellpsilas equations, and generalized Ohmpsilas law were considered. In energy conservation equations, work done by the electrical field, the force of friction and the thermal force were considered also.","PeriodicalId":138741,"journal":{"name":"2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114081830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An efficient method for RF integrated circuit analysis 一种有效的射频集成电路分析方法
2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2008-11-18 DOI: 10.1109/DEIV.2008.4676826
L. Dumitriu, M. Iordache, C. Popescu
{"title":"An efficient method for RF integrated circuit analysis","authors":"L. Dumitriu, M. Iordache, C. Popescu","doi":"10.1109/DEIV.2008.4676826","DOIUrl":"https://doi.org/10.1109/DEIV.2008.4676826","url":null,"abstract":"The paper presents a new version of the modified nodal method in transient behavior (the semi-state equations) for the analysis of the circuits driven by signals with widely separated time scales. The key idea is to use multiple time variables, which enable signals with widely separated rates of variation to be represented efficiently. The semi-state equation formulation in a partially symbolic form is used in order to obtain a MPDE (multi-time partial differential equation) form with a minimum number of independent variables. Combining an efficient procedure to compute the appropriate boundary conditions of the MPDE, with the semi-state approach, in which only the symbols of the parameters corresponding to the nonlinear circuit elements are considered, a significant efficiency in circuit design accelerating the reaching of the periodic steady state, and an improvement of the accuracy in the numerical calculations are obtained. The algorithm to formulate and to solve the dynamic modified nodal equations was implemented in a computing program, which constitutes a useful tool for steady-state analysis of a very large class of nonlinear analog circuits.","PeriodicalId":138741,"journal":{"name":"2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"204 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121539051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Plasma initiation of vacuum arcs on a metal surface partially covered with a dielectric film 在部分覆盖有介电膜的金属表面上产生真空电弧的等离子体
2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2008-11-18 DOI: 10.1109/DEIV.2008.4676859
V. Ivanov, A. Sakharov, M. Konyzhev
{"title":"Plasma initiation of vacuum arcs on a metal surface partially covered with a dielectric film","authors":"V. Ivanov, A. Sakharov, M. Konyzhev","doi":"10.1109/DEIV.2008.4676859","DOIUrl":"https://doi.org/10.1109/DEIV.2008.4676859","url":null,"abstract":"Excitation of vacuum arcs in the interaction of a plasma flow with a metal surface partially covered with a dielectric film is investigated experimentally and theoretically. A new phenomenon - the excitation of microscale electrical breakdowns (microplasma discharges) at the boundary between the free metal surface and the area covered with the film - is discovered. Microplasma discharges at the edge of the dielectric film are initiated by a strong electric field (ges1 MV/cm) that arises between the free metal surface and the outer surface of the film in the interaction with the plasma flow.","PeriodicalId":138741,"journal":{"name":"2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"134 5-6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132059634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书