2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)最新文献_第4页

Investigation of arc ignition modes for drawn vacuum arc with axial magnetic field (AMF) 轴向磁场抽真空电弧点火方式研究

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7748715

D. Feng, S. Xiu, Yi Wang, Ting Wang, Zixi Liu

引用次数: 2

Spectrally and spatially resolved imaging of an anode flare in the initial stage of a vacuum arc discharge 真空电弧放电初期阳极耀斑的光谱和空间分辨成像

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7748726

R. Methling, S. Popov, A. Batrakov, D. Uhrlandt

{"title":"Spectrally and spatially resolved imaging of an anode flare in the initial stage of a vacuum arc discharge","authors":"R. Methling, S. Popov, A. Batrakov, D. Uhrlandt","doi":"10.1109/DEIV.2016.7748726","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748726","url":null,"abstract":"Dynamics of the anode spot generation in the initial stage of vacuum arc with a short gap with gallium-indium liquid-metal electrodes was investigated. Using a spectrometer combined with an intensified CCD camera, spatial and spatio-spectral pattern of plasma emission from the discharge gap were registered with a temporal resolution of 10 ns. Generation of the anode flare begins with the intensive evaporation of anode material in the spark (high-voltage) stage of the discharge. In this period, only lines of neutral atoms are present in the spectrum measured at anode position although higher charge states can be found in the cathode spectra. Intensive ionization of anode flare atoms starts when the discharge changes from the spark to an arc (low-voltage) stage. Lines of single and double charged ions consistently appear in the spectrum. At the subsequent expansion of anode flare, the highest expansion velocity was observed for double charged ion lines, and the lowest one was found for neutral atoms. Expansion velocity was increasing with increasing a voltage and current.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116771518","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

Model of the formation of an elementary crater on the cucr cathode of a vacuum interrupters 真空灭弧器cucr阴极上元素坑形成的模型

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7748750

I. Uimanov, D. Shmelev, S. Barengolts

{"title":"Model of the formation of an elementary crater on the cucr cathode of a vacuum interrupters","authors":"I. Uimanov, D. Shmelev, S. Barengolts","doi":"10.1109/DEIV.2016.7748750","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748750","url":null,"abstract":"Semiempirical hydrodynamical model has been developed to describe the formation of a microcrater and liquid-metal jets in vacuum arc on CuCr cathode with chrome particles that are both, larger or smaller than microcrater within the two-dimensional axisymmetric problem formulation. This model includes Navier-Stokes equations for viscous incompressible liquid with free surface, thermal conductivity equation that considers heat convection and Joule heating, and continuity equation for calculation of current density distribution in the cathode. It was shown that the diameter of elementary crater in homogeneous Cr cathode is equal to 3-7 μm when the time of current flow through cathode binding area is equal to 20-60 ns within current range of elementary cell of cathode spot that is 1.5-7 A. Due to relatively low thermal conductivity of chrome the effect of Cr particle size on crater parameters is significant only if their size comparable with crater diameter. If particle size is larger than the diameter of molten area at least by 0.5 μm, space-time characteristics of crater formation process are identical to that of the Cr homogenous cathode. If initial size of chrome particle is smaller than the radius of forming crater, the chrome is pressed out of the crater.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"36 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114038413","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

Comparison of artificial current zero impulses for a vacuum interrupter based direct current circuit breaker 基于真空断流的直流断路器人工电流零脉冲的比较

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7764010

T. Heinz, P. Hock, V. Hinrichsen

{"title":"Comparison of artificial current zero impulses for a vacuum interrupter based direct current circuit breaker","authors":"T. Heinz, P. Hock, V. Hinrichsen","doi":"10.1109/DEIV.2016.7764010","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7764010","url":null,"abstract":"Investigations on direct current (DC) circuit breakers (CB) become more and more important. The major challenges of DC CBs compared to alternating current (AC) CBs are the lack of a natural current zero and the required absorption of the energy in the system. With an artificial current zero created by a parallel commutation path a vacuum interrupter (VI) can handle this duty. The commutation path has an important influence on the current interruption. Typically, a current zero impulse (CZI) is generated by an RLC circuit and is superimposed in opposite direction of the DC in the VI. Therefore, the capacitor in the RLC circuit is charged inversely to the VI voltage. By charging the capacitor in the same direction, the first half wave of the current impulse flows in the same direction and is added to the DC in the VI. As a result, the capacitor voltage changes polarity and now superimposes a CZI in the opposite direction. In this paper the influence of the CZI direction on the interruption performance of a VI is investigated. Furthermore, an alternative arrangement of the commutation circuit that generates a saw tooth-shaped CZI is presented and compared with the sinusoidal one.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122412629","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: 3

Simulation on dynamic arc-before process of large current vacuum breaking 大电流真空分断动态前弧过程仿真

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7748741

Li Jing, Yang Guang, Cui Ziwei, Cao Yundong, Fan Xiaomin

引用次数: 0

Co-simulation on the optimization design of high-speed electromagnetic repulsion mechanism of vacuum circuit breaker 真空断路器高速电磁斥力机构优化设计的联合仿真

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7763994

Yushan Hou, Z. Shi, Sheng Li, Yingkui Zhang, J. Bai, S. Jia, Lijun Wang

引用次数: 6

Optical investigation of constricted vacuum arcs 压缩真空弧的光学研究

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7748731

M. Abplanalp, K. Menzel, T. Delachaux, R. Sutterlin, F. Kassubek

引用次数: 1

Short-circuit current interruption in liquid nitrogen environment 液氮环境下短路电流中断

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7763970

K. Golde, V. Hinrichsen, D. Gentsch, A. Lawall, E. Taylor

{"title":"Short-circuit current interruption in liquid nitrogen environment","authors":"K. Golde, V. Hinrichsen, D. Gentsch, A. Lawall, E. Taylor","doi":"10.1109/DEIV.2016.7763970","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7763970","url":null,"abstract":"In combination with high temperature superconductive (HTS) equipment (e.g. current limiters) or in HTS subnets, which constitute a possible option for increasing the overall efficiency of electrical power distribution systems, only vacuum interrupters can be used directly in the liquid nitrogen environment. This would, however, be desirable for economic reasons. Circuit breakers and switches, respectively, are necessary to configure the network, and they should preferably be installed in the cold environment in order to avoid unnecessary transitions between the cold and the warm environment. In this investigation two commercially available vacuum interrupter (VI) types from two different manufacturers were investigated at ambient temperature and in liquid nitrogen. The breaking current was increased until an insulation of the transient recovery voltage (TRV) was not possible anymore. All tests were performed on two different types of vacuum interrupters, but installed in the same switchgear. The short circuit performance did not show any significant change in the liquid nitrogen environment. This paper also offers an outline of future tests needed to validate the use of VIs at low temperatures.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133658273","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

AMF electrode diameter simulation for HV vacuum interrupter 高压真空灭弧器AMF电极直径模拟

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7763940

Zheng Wang

引用次数: 0

Research on 40.5kV two-break vacuum circuit breaker for switching capacitor banks 40.5kV开关电容器组双开真空断路器的研究

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7763999

Tong Wang, Jing Yan, Xiaoshe Zhai, Zhiyuan Liu, Yingsan Geng, Yuxiu Chen

{"title":"Research on 40.5kV two-break vacuum circuit breaker for switching capacitor banks","authors":"Tong Wang, Jing Yan, Xiaoshe Zhai, Zhiyuan Liu, Yingsan Geng, Yuxiu Chen","doi":"10.1109/DEIV.2016.7763999","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7763999","url":null,"abstract":"Restrike caused by interrupting capacitor banks with vacuum circuit breakers will lead to severe switching overvoltage, which may cause great damage to power system. Reducing the probability of restrike during capacitive current breaking is the ultimate solution to limit overvoltage. In this paper, a new design of vacuum circuit breaker with a very low probability of restrike is proposed based on the analysis of restrike mechanism. A kind of vacuum circuit breaker with two breaks is presented, to carry out the duty of capacitor bank switching, and further meet the requirement of class C2 in IEC terms. A capacitive current switching test circuit is developed, which consisted of a high frequency inrush current circuit and a power frequency circuit, to perform back-to-back capacitor banks switching test. The test results show that two-break vacuum circuit breakers can reduce the probability of restrike significantly; short-circuit making and breaking capacity of the vacuum circuit breakers is validated by synthetic test. The optimum value of the shunt grading capacitor is determined to ensure the stress of each break is approximately equal.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"208 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114394701","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