Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7763934
Jie Deng, Lijun Wang, K. Qin, Xiao Zhang, S. Jia
In this paper, a 3D model for vacuum arc controlled by transverse magnetic field (TMF) is built and simulation on its parameters is calculated. In the simulation, only the external TMF is taken into consideration and arc is assumed to contracts itself. Arc is not neutral so that ions and electrons are calculated respectively. According to the simulation results, both ions and electrons are deflected under TMF. When TMF becomes stronger, arc deflection also becomes more significant. As for different particles, electrons have a smaller mass and they are easier to driven deflected when TMF is not so strong. Arc behaves more active under stronger TMF, thus arc temperature is higher. Electron velocity is much higher than ion velocity but TMF does not deflects the distribution of velocity much. As a result, the deflection of current density is largely determined by electron number density deflection.
{"title":"3D simulation on vacuum arc controlled by external transverse magnetic field","authors":"Jie Deng, Lijun Wang, K. Qin, Xiao Zhang, S. Jia","doi":"10.1109/DEIV.2016.7763934","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7763934","url":null,"abstract":"In this paper, a 3D model for vacuum arc controlled by transverse magnetic field (TMF) is built and simulation on its parameters is calculated. In the simulation, only the external TMF is taken into consideration and arc is assumed to contracts itself. Arc is not neutral so that ions and electrons are calculated respectively. According to the simulation results, both ions and electrons are deflected under TMF. When TMF becomes stronger, arc deflection also becomes more significant. As for different particles, electrons have a smaller mass and they are easier to driven deflected when TMF is not so strong. Arc behaves more active under stronger TMF, thus arc temperature is higher. Electron velocity is much higher than ion velocity but TMF does not deflects the distribution of velocity much. As a result, the deflection of current density is largely determined by electron number density deflection.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"19 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":"133590290","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}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7763960
Wu Nan, L. Xiaoming, Chen Hai, Zhang Yanyan
Aiming at the system of triple-electrode switch, the fluid-chemistry model of plasma is established based on the particles' diffusion, collision, ionization and excitation and the finite element method. The micro process of self-breakdown of triple-electrode switch system is simulated in vacuum and SF6. The simulation results clearly revealed that the physical process from initial discharge to plasma channel formed. The plasma channel has more electron number in vacuum compared with it in SF6, and the electron temperature is lower. It lays a theoretical foundation for accurately and fully revealing the physical mechanism of the triple-electrode switch system and helping to find the method to improve the performance of the system.
{"title":"Analysis on breakdown characteristics of triple-electrode switch in vacuum","authors":"Wu Nan, L. Xiaoming, Chen Hai, Zhang Yanyan","doi":"10.1109/DEIV.2016.7763960","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7763960","url":null,"abstract":"Aiming at the system of triple-electrode switch, the fluid-chemistry model of plasma is established based on the particles' diffusion, collision, ionization and excitation and the finite element method. The micro process of self-breakdown of triple-electrode switch system is simulated in vacuum and SF6. The simulation results clearly revealed that the physical process from initial discharge to plasma channel formed. The plasma channel has more electron number in vacuum compared with it in SF6, and the electron temperature is lower. It lays a theoretical foundation for accurately and fully revealing the physical mechanism of the triple-electrode switch system and helping to find the method to improve the performance of the system.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"9 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":"130633869","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}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7748740
D. Shmelev, S. Barengolts, M. M. Tsventoukh, I. Uimanov
This paper deals with the computer modeling of vacuum arc with composite multicomponent cathode. This arc is typical for certain kind of ion sources, plasma generator and vacuum interrupters. The described hybrid model treats the electrons as an inertialess fluid and ions as macroparticles. The macroparticle dynamic is calculated with the use of PIC method. Ion-ion Coulomb collision is considered with the use of MC method. The model can simulate vacuum arc as a whole including separate cathode plasma jets, mixing zone, and common plasma column. The dependence of ion angular current distribution on the cathode composition reproduced with the help of developed model agrees well with experimental results.
{"title":"On the formation of the angular distribution of ions of different spices in a plasma jet of a vacuum arc with composite cathode","authors":"D. Shmelev, S. Barengolts, M. M. Tsventoukh, I. Uimanov","doi":"10.1109/DEIV.2016.7748740","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748740","url":null,"abstract":"This paper deals with the computer modeling of vacuum arc with composite multicomponent cathode. This arc is typical for certain kind of ion sources, plasma generator and vacuum interrupters. The described hybrid model treats the electrons as an inertialess fluid and ions as macroparticles. The macroparticle dynamic is calculated with the use of PIC method. Ion-ion Coulomb collision is considered with the use of MC method. The model can simulate vacuum arc as a whole including separate cathode plasma jets, mixing zone, and common plasma column. The dependence of ion angular current distribution on the cathode composition reproduced with the help of developed model agrees well with experimental results.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"59 5 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":"132054053","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}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7763945
D. Shmelev, V. Oreshkin, I. Uimanov
The paper is devoted to the further developing of a numerical model for the simulation of high current vacuum arcs (HCVA) with cathode attachment in the form of multiple cathode spots. The model allows one to simulate: the supersonic/subsonic transition in HCVA, near-cathode mixing zone, and HCVA with multiply separate columns. This is the continuation of previous work of the authors about of the HCVA hybrid model [6]. The model is substantially modified. Ionization, recombination, and charge exchange of atom and ions are taken in considerations with the help of Monte Carlo methods. The modification allows to take in account the dependence of ion sticking coefficient on the incident angle and to follow the further evolution of the resulting atom.
{"title":"Numerical simulation of high-current vacuum arc in external magnetic field with ion sticking probability depending on the incident angle","authors":"D. Shmelev, V. Oreshkin, I. Uimanov","doi":"10.1109/DEIV.2016.7763945","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7763945","url":null,"abstract":"The paper is devoted to the further developing of a numerical model for the simulation of high current vacuum arcs (HCVA) with cathode attachment in the form of multiple cathode spots. The model allows one to simulate: the supersonic/subsonic transition in HCVA, near-cathode mixing zone, and HCVA with multiply separate columns. This is the continuation of previous work of the authors about of the HCVA hybrid model [6]. The model is substantially modified. Ionization, recombination, and charge exchange of atom and ions are taken in considerations with the help of Monte Carlo methods. The modification allows to take in account the dependence of ion sticking coefficient on the incident angle and to follow the further evolution of the resulting atom.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"37 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":"130233793","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}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7763971
Guowei Kong, Jie Wei, Jisheng Liang, Haoqing Wang, Xiangyang Li
Solid insulated switchgear (SIS) has been accepted widely and became much small-size, nowadays. However, the miniaturization of SIS has restriction on the distance between the internal bus and the vacuum interrupter (VI). This will not only affect the electrical insulation and partial discharge characteristics of the SIS, but also will affect the current breaking capacity of the SIS. In order to improve the breaking capacity of a miniaturization SIS, the purpose of this paper is to study the transverse magnetic blowing action in a SIS, to calculate the electrodynamic force affected by pass bus conductor, and to simulate the magnetic field distribution between contact gaps generated by pass bus conductor. Lastly, a magnetic shielding solutions for the transverse magnetic blowing action is given, which has passed the test verification. The results showed that a magnetic shield in a vacuum interrupter is a powerful solution to solve the arc transverse blowing action to contact shield caused by the bus magnetic field in a SIS vacuum Interruption.
{"title":"Study on the transverse burning action to contact shield during high-current vacuum interruptions in a solid insulated switchgear","authors":"Guowei Kong, Jie Wei, Jisheng Liang, Haoqing Wang, Xiangyang Li","doi":"10.1109/DEIV.2016.7763971","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7763971","url":null,"abstract":"Solid insulated switchgear (SIS) has been accepted widely and became much small-size, nowadays. However, the miniaturization of SIS has restriction on the distance between the internal bus and the vacuum interrupter (VI). This will not only affect the electrical insulation and partial discharge characteristics of the SIS, but also will affect the current breaking capacity of the SIS. In order to improve the breaking capacity of a miniaturization SIS, the purpose of this paper is to study the transverse magnetic blowing action in a SIS, to calculate the electrodynamic force affected by pass bus conductor, and to simulate the magnetic field distribution between contact gaps generated by pass bus conductor. Lastly, a magnetic shielding solutions for the transverse magnetic blowing action is given, which has passed the test verification. The results showed that a magnetic shield in a vacuum interrupter is a powerful solution to solve the arc transverse blowing action to contact shield caused by the bus magnetic field in a SIS vacuum Interruption.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"35 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":"125558317","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}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7763959
K. Wang, Z. Shi, Y. Shi, S. Jia
The electrical explosion of metal wire has been encountered in many physical fields, such as wire-array Z pinch, x-ray source, synthesis of nanopowder, etc. The investigation on the resistive part of the electrical explosion of metal wire is very important for wire-array Z pinch. The structure and value of the energy deposition have decisive influence on the stagnation phase in the wire-array Z pinch. In this paper, the energy deposition in the initial stage of the exploding silver wire, which is kind of high-conductivity, fusible metal, is investigated experimentally. The nanosecond negative pulsed-current with magnitude of ~1kA is generated by a capacitor bank with charging voltage of 16kV. The typical energy deposition process is calculated by integrating the products of resistive voltage and current. A laser probe (532nm, 30ps) is applied to construct shadowgraphy diagnostics. The morphology of the exploding high-density products is demonstrated. The structure of the energy deposition, which is derived from the shadowgram, is analyzed.
{"title":"Energy deposition in electrical explosion of silver wire in vacuum","authors":"K. Wang, Z. Shi, Y. Shi, S. Jia","doi":"10.1109/DEIV.2016.7763959","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7763959","url":null,"abstract":"The electrical explosion of metal wire has been encountered in many physical fields, such as wire-array Z pinch, x-ray source, synthesis of nanopowder, etc. The investigation on the resistive part of the electrical explosion of metal wire is very important for wire-array Z pinch. The structure and value of the energy deposition have decisive influence on the stagnation phase in the wire-array Z pinch. In this paper, the energy deposition in the initial stage of the exploding silver wire, which is kind of high-conductivity, fusible metal, is investigated experimentally. The nanosecond negative pulsed-current with magnitude of ~1kA is generated by a capacitor bank with charging voltage of 16kV. The typical energy deposition process is calculated by integrating the products of resistive voltage and current. A laser probe (532nm, 30ps) is applied to construct shadowgraphy diagnostics. The morphology of the exploding high-density products is demonstrated. The structure of the energy deposition, which is derived from the shadowgram, is analyzed.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"8 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":"123084838","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}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7748661
S. Kobayashi
Ion beam sputter cleaning, electrode surface heating by an infrared-ray, and an X-ray Photoelectron Spectroscopy (XPS) system were equipped in conjunction with a vacuum breakdown measurement apparatus (in situ experiment system). This system enables to carry out surface treatments, surface analysis and breakdown characteristics measurements without exposure of sample electrodes to air. It was confirmed that in situ surface cleaning was effective and necessary to achieve higher conditioned breakdown field. However, also confirmed was that the breakdown field after the in situ cleaning did not always improve breakdown field at the first voltage application. Conditioning was carried out by repetitive breakdowns by applying impulse voltage application. Surface analysis revealed that electrode surface before the conditioning was covered with oxidized layer and hydro-carbon contaminated layer and those layers were completely removed after the conditioning. Electrode heating was able to get clean surface and achieve higher conditioned field. Many experimental results obtained from in situ system represent that precautions of electrode surface were necessary but was not sufficient, and strongly suggest there may be factors to be found out.
{"title":"Research on vacuum insulation properties — In situ measurements and surface analysis","authors":"S. Kobayashi","doi":"10.1109/DEIV.2016.7748661","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748661","url":null,"abstract":"Ion beam sputter cleaning, electrode surface heating by an infrared-ray, and an X-ray Photoelectron Spectroscopy (XPS) system were equipped in conjunction with a vacuum breakdown measurement apparatus (in situ experiment system). This system enables to carry out surface treatments, surface analysis and breakdown characteristics measurements without exposure of sample electrodes to air. It was confirmed that in situ surface cleaning was effective and necessary to achieve higher conditioned breakdown field. However, also confirmed was that the breakdown field after the in situ cleaning did not always improve breakdown field at the first voltage application. Conditioning was carried out by repetitive breakdowns by applying impulse voltage application. Surface analysis revealed that electrode surface before the conditioning was covered with oxidized layer and hydro-carbon contaminated layer and those layers were completely removed after the conditioning. Electrode heating was able to get clean surface and achieve higher conditioned field. Many experimental results obtained from in situ system represent that precautions of electrode surface were necessary but was not sufficient, and strongly suggest there may be factors to be found out.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"25 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":"126601058","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}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7764004
Y. Niwa, N. Asari, W. Sakaguchi, A. Daibo, Y. Sekimori
The vacuum arc behavior and high current interruption ability of electrodes applied in the uniform vacuum arc control method are presented. The axial magnetic field (AMF) distribution of this method is unlike that of the conventional AMF distribution. For extremely high interruption current, the arc of the conventional AMF electrode concentrates, causing local heating of the electrode, but the arc of this method diffuses over the whole contact area thus avoiding local heating. The interruption characteristic is investigated. The relationship between the arc energy and the electrical field after the current zero was estimated. The relation among the electrode structure, the arc behavior and the magnetic field distribution between the electrodes is investigated. The vacuum interrupter with this vacuum arc control method is applied for Solid Insulated Switchgear (SIS). These vacuum interrupters are demonstrated to be higher interruption ability than the conventional AMF vacuum interrupter.
{"title":"Fundamental research of uniform vacuum arc control by magnetic field and its application to VCB","authors":"Y. Niwa, N. Asari, W. Sakaguchi, A. Daibo, Y. Sekimori","doi":"10.1109/DEIV.2016.7764004","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7764004","url":null,"abstract":"The vacuum arc behavior and high current interruption ability of electrodes applied in the uniform vacuum arc control method are presented. The axial magnetic field (AMF) distribution of this method is unlike that of the conventional AMF distribution. For extremely high interruption current, the arc of the conventional AMF electrode concentrates, causing local heating of the electrode, but the arc of this method diffuses over the whole contact area thus avoiding local heating. The interruption characteristic is investigated. The relationship between the arc energy and the electrical field after the current zero was estimated. The relation among the electrode structure, the arc behavior and the magnetic field distribution between the electrodes is investigated. The vacuum interrupter with this vacuum arc control method is applied for Solid Insulated Switchgear (SIS). These vacuum interrupters are demonstrated to be higher interruption ability than the conventional AMF vacuum interrupter.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"152 4 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":"114062918","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}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7763988
Fei Yan, D. Jin, Lei Chen, X. Wan, K. Xiao
Measuring the pressure inside the compact sealed electronic vacuum devices is a difficult proposition that typically requires destructive analysis. In the paper, we offer an indirectly method to pressure measurement without operating the devices. Towards that end, a simple and compact Penning-type diacharge structure only include two electrodes and an additional permanent magnet is established. The discharge characteristics under different anode voltages and different pressures are studied. The principle in measuring the pressure inside compact sealed electronic vacuum devices is analyzed, and the pressure-current chart is acquired. A sustaining discharge strikes with a measurable pressure varying current starting at a pressure of 1-10-2 Pa of helium. These results demonstrate the validity of this research and by applying our structure to compact sealed electronic vacuum devices, pressures inside the tubes can be measured without puncturing the vacuum envelope.
{"title":"Non-destructive gas pressure measurement in compact sealed electronic vacuum devices by penning-type discharge","authors":"Fei Yan, D. Jin, Lei Chen, X. Wan, K. Xiao","doi":"10.1109/DEIV.2016.7763988","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7763988","url":null,"abstract":"Measuring the pressure inside the compact sealed electronic vacuum devices is a difficult proposition that typically requires destructive analysis. In the paper, we offer an indirectly method to pressure measurement without operating the devices. Towards that end, a simple and compact Penning-type diacharge structure only include two electrodes and an additional permanent magnet is established. The discharge characteristics under different anode voltages and different pressures are studied. The principle in measuring the pressure inside compact sealed electronic vacuum devices is analyzed, and the pressure-current chart is acquired. A sustaining discharge strikes with a measurable pressure varying current starting at a pressure of 1-10-2 Pa of helium. These results demonstrate the validity of this research and by applying our structure to compact sealed electronic vacuum devices, pressures inside the tubes can be measured without puncturing the vacuum envelope.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"63 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120939955","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}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7748685
Feng Li, Jihao Jiang, Le Xu, Junjun Kang, Meng Wang
The vacuum insulator surface flashover phenomenon unusually occurred in the pulsed power devices. We used the transformer oil to coat on the insulator surface for increasing the insulation strength in vacuum. The experiment results show that the transformer oil coating could significantly improve insulator flashover voltage level due to oil layer limited the development of the secondary electron avalanche. We have changed the transformer oil coated regions to investigate the insulator flashover strength. The experiments indicated that the coating region would influence the flashover voltage. The flashover strength would be improved by coating transformer oil on the cathode region. The design of grooved insulator would increase the flashover strength. The flashover strength of grooved insulator with coating oil is higher that of flat insulator with coating oil.
{"title":"Investigation on surface flashover characteristics of the insulator with different transformer oil coating conditions in vacuum","authors":"Feng Li, Jihao Jiang, Le Xu, Junjun Kang, Meng Wang","doi":"10.1109/DEIV.2016.7748685","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748685","url":null,"abstract":"The vacuum insulator surface flashover phenomenon unusually occurred in the pulsed power devices. We used the transformer oil to coat on the insulator surface for increasing the insulation strength in vacuum. The experiment results show that the transformer oil coating could significantly improve insulator flashover voltage level due to oil layer limited the development of the secondary electron avalanche. We have changed the transformer oil coated regions to investigate the insulator flashover strength. The experiments indicated that the coating region would influence the flashover voltage. The flashover strength would be improved by coating transformer oil on the cathode region. The design of grooved insulator would increase the flashover strength. The flashover strength of grooved insulator with coating oil is higher that of flat insulator with coating oil.","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":"124986737","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}
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