Pub Date : 2003-10-19DOI: 10.1109/CEIDP.2003.1254921
D. Zheng, C.T. Chen, H.W. Liu, J. Yang
The aims are to develop new kinds of insulating mediums being technically as well as economically attractive and fully understand the electronegative gas characteristic of endurance voltages, mechanism of partial discharge and widen their using areas in the high voltage system experiments. The article presents the experiment procedures, contents are involved in as follow: point-plane, point-point, co-axial cylindrical and co-centric sphere electrode systems, and industrial purity SF/sub 6/ and its mixture combining N/sub 2/ are filled into the experiment chamber in different partial pressure and applied the AC and impulse voltages in different pressures. The mechanism of initiated PD potentials and breakdown of the SF/sub 6/ and SF/sub 6//N/sub 2/ have been analyzed theoretically according to the molecular structure and physical characteristics of the electro-negative vases, the research works are helpful to develop and widen using fields of the SF/sub 6/ and its mixtures in high voltage engineering.
{"title":"Endurance behavior of the SF/sub 6//N/sub 2/ mixtures experiment under AC and impulse voltages","authors":"D. Zheng, C.T. Chen, H.W. Liu, J. Yang","doi":"10.1109/CEIDP.2003.1254921","DOIUrl":"https://doi.org/10.1109/CEIDP.2003.1254921","url":null,"abstract":"The aims are to develop new kinds of insulating mediums being technically as well as economically attractive and fully understand the electronegative gas characteristic of endurance voltages, mechanism of partial discharge and widen their using areas in the high voltage system experiments. The article presents the experiment procedures, contents are involved in as follow: point-plane, point-point, co-axial cylindrical and co-centric sphere electrode systems, and industrial purity SF/sub 6/ and its mixture combining N/sub 2/ are filled into the experiment chamber in different partial pressure and applied the AC and impulse voltages in different pressures. The mechanism of initiated PD potentials and breakdown of the SF/sub 6/ and SF/sub 6//N/sub 2/ have been analyzed theoretically according to the molecular structure and physical characteristics of the electro-negative vases, the research works are helpful to develop and widen using fields of the SF/sub 6/ and its mixtures in high voltage engineering.","PeriodicalId":306575,"journal":{"name":"2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128526987","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 : 2003-10-19DOI: 10.1109/CEIDP.2003.1254786
K. Bambery, R. Fleming
Space charge measurements were made on low density polyethylene samples to which dc fields had been applied. Some measurements were performed under isothermal conditions, and others with a temperature gradient established across the sample thickness. Isochronal current density. was also measured as a function of temperature and field. The activation energy associated with the hopping transport of electrons through the sample volume was around 0.09 eV, whereas the activation energies deduced from the temperature dependence of the isochronal current density were in the range 0.60-1.40 eV, depending on the applied field strength and the impurity content of the samples. It was concluded that the isochronal current densities were controlled by electron injection from the cathode, the most likely injection mechanism being tunnelling between the Fermi level of the metallic electrode and acceptor sites within the dielectric close to the interface.
{"title":"Activation energies and electron transport in LDPE","authors":"K. Bambery, R. Fleming","doi":"10.1109/CEIDP.2003.1254786","DOIUrl":"https://doi.org/10.1109/CEIDP.2003.1254786","url":null,"abstract":"Space charge measurements were made on low density polyethylene samples to which dc fields had been applied. Some measurements were performed under isothermal conditions, and others with a temperature gradient established across the sample thickness. Isochronal current density. was also measured as a function of temperature and field. The activation energy associated with the hopping transport of electrons through the sample volume was around 0.09 eV, whereas the activation energies deduced from the temperature dependence of the isochronal current density were in the range 0.60-1.40 eV, depending on the applied field strength and the impurity content of the samples. It was concluded that the isochronal current densities were controlled by electron injection from the cathode, the most likely injection mechanism being tunnelling between the Fermi level of the metallic electrode and acceptor sites within the dielectric close to the interface.","PeriodicalId":306575,"journal":{"name":"2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127099563","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 : 2003-10-19DOI: 10.1109/CEIDP.2003.1254830
Chuntian Chen, Ying Zhang, Z. Luan, Jing Li
Employed non-dimensional analysis of the differential equation for the charged liquid interfacial wave, rationality and instability of the interface between two layers of immiscible fluids were investigated under the gravitational field. The results show that Huygens-Fresnel instability and Rayleigh-Taylor instability decrease, and the attenuation rate of the aperiodic fluctuation ratio increases with the increase in the viscosity ratio and the density ratio of the fluids. Furthermore, it is discussed that the interface endures the electric stress when existed electric field.
{"title":"Instability analysis of the charged liquid interface","authors":"Chuntian Chen, Ying Zhang, Z. Luan, Jing Li","doi":"10.1109/CEIDP.2003.1254830","DOIUrl":"https://doi.org/10.1109/CEIDP.2003.1254830","url":null,"abstract":"Employed non-dimensional analysis of the differential equation for the charged liquid interfacial wave, rationality and instability of the interface between two layers of immiscible fluids were investigated under the gravitational field. The results show that Huygens-Fresnel instability and Rayleigh-Taylor instability decrease, and the attenuation rate of the aperiodic fluctuation ratio increases with the increase in the viscosity ratio and the density ratio of the fluids. Furthermore, it is discussed that the interface endures the electric stress when existed electric field.","PeriodicalId":306575,"journal":{"name":"2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127142770","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 : 2003-10-19DOI: 10.1109/CEIDP.2003.1254815
X.S. Liu, A. Vaughan, G. Chen
Low density polyethylene (LDPE) films were subjected to a range of electrical stresses. Analysis of samples aged in the bulk by Raman microprobe spectroscopy indicated that changes in the spectra are only observed when samples are subjected to high electrical stresses for long periods of time. Even then, no specific chemical effects were detected; degradation only manifested itself in the form of mild fluorescence. Corona-induced surface reactions were also examined. Although the surface texture was found to change radically, subsequent Raman analysis revealed few chemical changes in the polymer, implying that erosion involves fragmentation of the LDPE and the formation of volatile by-products. No residues were detected on the samples. In addition to the LDPE itself, the corona electrode was also analyzed. This revealed the presence of extensive deposits with the fingerprint of sp/sup 2/ hybridized carbon. The significance of these results are discussed with respect to high field ageing processes, particularly, the development of electrical trees.
{"title":"A Raman spectroscopic study of bulk and surface ageing phenomena in polyethylene","authors":"X.S. Liu, A. Vaughan, G. Chen","doi":"10.1109/CEIDP.2003.1254815","DOIUrl":"https://doi.org/10.1109/CEIDP.2003.1254815","url":null,"abstract":"Low density polyethylene (LDPE) films were subjected to a range of electrical stresses. Analysis of samples aged in the bulk by Raman microprobe spectroscopy indicated that changes in the spectra are only observed when samples are subjected to high electrical stresses for long periods of time. Even then, no specific chemical effects were detected; degradation only manifested itself in the form of mild fluorescence. Corona-induced surface reactions were also examined. Although the surface texture was found to change radically, subsequent Raman analysis revealed few chemical changes in the polymer, implying that erosion involves fragmentation of the LDPE and the formation of volatile by-products. No residues were detected on the samples. In addition to the LDPE itself, the corona electrode was also analyzed. This revealed the presence of extensive deposits with the fingerprint of sp/sup 2/ hybridized carbon. The significance of these results are discussed with respect to high field ageing processes, particularly, the development of electrical trees.","PeriodicalId":306575,"journal":{"name":"2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127282019","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 : 2003-10-19DOI: 10.1109/CEIDP.2003.1254792
A. Garner, J. Yang, N. Chen, J. Kolb, K. Loftin, R. J. Swanson, S. Beebe, R. Joshi, K. Schoenbach
Despite a basic knowledge of cells' biochemical processes, their electrical properties, particularly the changes in membrane properties upon the application of pulsed electric fields (PEF's), have not yet been fully characterized. Microsecond pulses above a certain threshold cause electroporation of the cell membrane while nanosecond pulses of higher voltage additionally porate the inner organelles. We used Time Domain Dielectric Spectroscopy to measure the conductivity of HL-60 (human leukemia) cell suspensions as a function of time after 10 ns, 78.5 kV/cm pulses and 50 /spl mu/s, 1.1 kV/cm pulses, which have the same energy. The conductivity increased immediately after the 50 /spl mu/s pulse, indicating that ion channels in the HL-60 membranes initially opened. However, the conductivity decreased immediately after the ultrashort pulse, indicating that ion channels initially closed. The conductivity decreases significantly approximately 40 minutes after both pulses. This suggests that not only do the pores or channels opened close, but pores or channels open in the membrane prior to the pulse may close as well. These measurements were an intermediate step in determining the electrical properties of HL-60 cells using a two-shell model. Once determined, these electrical parameters will be used in electroporation models developed at Old Dominion University.
{"title":"Effects of electrical pulses on the dielectric properties of biological cells","authors":"A. Garner, J. Yang, N. Chen, J. Kolb, K. Loftin, R. J. Swanson, S. Beebe, R. Joshi, K. Schoenbach","doi":"10.1109/CEIDP.2003.1254792","DOIUrl":"https://doi.org/10.1109/CEIDP.2003.1254792","url":null,"abstract":"Despite a basic knowledge of cells' biochemical processes, their electrical properties, particularly the changes in membrane properties upon the application of pulsed electric fields (PEF's), have not yet been fully characterized. Microsecond pulses above a certain threshold cause electroporation of the cell membrane while nanosecond pulses of higher voltage additionally porate the inner organelles. We used Time Domain Dielectric Spectroscopy to measure the conductivity of HL-60 (human leukemia) cell suspensions as a function of time after 10 ns, 78.5 kV/cm pulses and 50 /spl mu/s, 1.1 kV/cm pulses, which have the same energy. The conductivity increased immediately after the 50 /spl mu/s pulse, indicating that ion channels in the HL-60 membranes initially opened. However, the conductivity decreased immediately after the ultrashort pulse, indicating that ion channels initially closed. The conductivity decreases significantly approximately 40 minutes after both pulses. This suggests that not only do the pores or channels opened close, but pores or channels open in the membrane prior to the pulse may close as well. These measurements were an intermediate step in determining the electrical properties of HL-60 cells using a two-shell model. Once determined, these electrical parameters will be used in electroporation models developed at Old Dominion University.","PeriodicalId":306575,"journal":{"name":"2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129137103","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 : 2003-10-19DOI: 10.1109/CEIDP.2003.1254896
S.N. Fernando, M. Raghuveer, W. Ziomek
The impulse test on power transformers simulates the conditions that exists in service when a transformer is subjected to an incoming high voltage surge due to lightning or other disturbances on the associated transmission line. There have been several studies on the application of wavelets to identify faults during impulse testing. Most of these studies have utilized simulated waveforms in which the fault is introduced by a suitable mathematical model. In this paper the authors have used a new technique to simulate such faults. Experimentally obtained waveforms are used to investigate the suitability of wavelets to detect faults during impulse testing and this paper presents preliminary results of this research work.
{"title":"Detection of temporary faults during impulse tests using wavelets","authors":"S.N. Fernando, M. Raghuveer, W. Ziomek","doi":"10.1109/CEIDP.2003.1254896","DOIUrl":"https://doi.org/10.1109/CEIDP.2003.1254896","url":null,"abstract":"The impulse test on power transformers simulates the conditions that exists in service when a transformer is subjected to an incoming high voltage surge due to lightning or other disturbances on the associated transmission line. There have been several studies on the application of wavelets to identify faults during impulse testing. Most of these studies have utilized simulated waveforms in which the fault is introduced by a suitable mathematical model. In this paper the authors have used a new technique to simulate such faults. Experimentally obtained waveforms are used to investigate the suitability of wavelets to detect faults during impulse testing and this paper presents preliminary results of this research work.","PeriodicalId":306575,"journal":{"name":"2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126937692","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 : 2003-10-19DOI: 10.1109/CEIDP.2003.1254945
K. Adamiak
The charge transport in low conductivity fluids is studied numerically for the wire-plane configuration. A simple conduction model, based on dissociation and recombination processes, is assumed. The numerical algorithm uses the Finite Element Method for the electric field, and the Method of Characteristics for the density of positive and negative ions. The results of simulation show effect of the nondimensional residual conductivity number on the thickness of the heterocharge layers close to both electrodes and distribution of the net space charge.
{"title":"Charge transport in weakly conducting liquids; wire-plane configuration","authors":"K. Adamiak","doi":"10.1109/CEIDP.2003.1254945","DOIUrl":"https://doi.org/10.1109/CEIDP.2003.1254945","url":null,"abstract":"The charge transport in low conductivity fluids is studied numerically for the wire-plane configuration. A simple conduction model, based on dissociation and recombination processes, is assumed. The numerical algorithm uses the Finite Element Method for the electric field, and the Method of Characteristics for the density of positive and negative ions. The results of simulation show effect of the nondimensional residual conductivity number on the thickness of the heterocharge layers close to both electrodes and distribution of the net space charge.","PeriodicalId":306575,"journal":{"name":"2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126872680","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 : 2003-10-19DOI: 10.1109/CEIDP.2003.1254802
Y. Zhu, S. Yamashita, N. Anami, M. Otsubo, C. Honda, S. Hashimoto, Y. Hashimot
This paper describes the results of experiments made to examine the electrical insulating characteristics of polymer materials in a salt fog ageing test. In this study, the factors that affect the insulation deterioration from water droplets were analyzed by means of electric field calculation and some experiments. It is demonstrated that water droplets on the polymer surface locally enhance the electric field and may cause partial discharge. From the results of ageing test, when polymer loses its hydrophobicity with ageing time, water drops will elongate, coalesce, and extend with ellipsoidal shape in the direction of electric field, which results in peak value and higher harmonic component in the change curve of the maximum horizontal E-Field at the triple junction increasing remarkably. Simultaneously, increase tendency of the third harmonic wave component with time elapsing can be observed in leakage current waveform, which is in agreement with the results of electric field calculation.
{"title":"Leakage current analysis and electric field calculation in salt fog ageing test on polymer insulation material","authors":"Y. Zhu, S. Yamashita, N. Anami, M. Otsubo, C. Honda, S. Hashimoto, Y. Hashimot","doi":"10.1109/CEIDP.2003.1254802","DOIUrl":"https://doi.org/10.1109/CEIDP.2003.1254802","url":null,"abstract":"This paper describes the results of experiments made to examine the electrical insulating characteristics of polymer materials in a salt fog ageing test. In this study, the factors that affect the insulation deterioration from water droplets were analyzed by means of electric field calculation and some experiments. It is demonstrated that water droplets on the polymer surface locally enhance the electric field and may cause partial discharge. From the results of ageing test, when polymer loses its hydrophobicity with ageing time, water drops will elongate, coalesce, and extend with ellipsoidal shape in the direction of electric field, which results in peak value and higher harmonic component in the change curve of the maximum horizontal E-Field at the triple junction increasing remarkably. Simultaneously, increase tendency of the third harmonic wave component with time elapsing can be observed in leakage current waveform, which is in agreement with the results of electric field calculation.","PeriodicalId":306575,"journal":{"name":"2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116609524","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 : 2003-10-19DOI: 10.1109/CEIDP.2003.1254934
M. Nagao, N. Hozumi, K. Kawakami, K. Nagahama, T. Iwasaki, Y. Muramoto, T. Tanaka
We have been developing a standard specimen to evaluate electrical insulation properties at polymeric solid-solid internal interface, especially modeling the interface in EHV extruded cable splices. The degradation at polymeric solid internal interface in cable splices is considered to be initiated by the partial discharge (PD) phenomena. This paper describes the partial discharge (PD) behavior of the developed specimen when a tungsten fine wire is introduced at the interface as a conductive foreign substance. Under the voltage application the maximum PD magnitude (Qmax) and PD number (n) decreased with time and PD tended to disappear. This phenomenon is not a swarming pulsive microdischarge one, since the PD inception voltage (Vi) increased with the voltage application time. When voltage application is stopped for a long time, Vi decreased to the initial value and the values of both Qmax and n recovered. The recovery of PD characteristic became faster when the pause of voltage application became shorter. The surface resistance between two tungsten wires installed at the interface decreased after suffering the PD and then recovered with the pause of voltage application with similar time variation of PD characteristic. These PD behaviors are to be related to the electric field relaxation at the tungsten wire tip.
{"title":"Development of model specimen for evaluating insulation properties and partial discharge phenomena of polymeric solid-solid internal interface","authors":"M. Nagao, N. Hozumi, K. Kawakami, K. Nagahama, T. Iwasaki, Y. Muramoto, T. Tanaka","doi":"10.1109/CEIDP.2003.1254934","DOIUrl":"https://doi.org/10.1109/CEIDP.2003.1254934","url":null,"abstract":"We have been developing a standard specimen to evaluate electrical insulation properties at polymeric solid-solid internal interface, especially modeling the interface in EHV extruded cable splices. The degradation at polymeric solid internal interface in cable splices is considered to be initiated by the partial discharge (PD) phenomena. This paper describes the partial discharge (PD) behavior of the developed specimen when a tungsten fine wire is introduced at the interface as a conductive foreign substance. Under the voltage application the maximum PD magnitude (Qmax) and PD number (n) decreased with time and PD tended to disappear. This phenomenon is not a swarming pulsive microdischarge one, since the PD inception voltage (Vi) increased with the voltage application time. When voltage application is stopped for a long time, Vi decreased to the initial value and the values of both Qmax and n recovered. The recovery of PD characteristic became faster when the pause of voltage application became shorter. The surface resistance between two tungsten wires installed at the interface decreased after suffering the PD and then recovered with the pause of voltage application with similar time variation of PD characteristic. These PD behaviors are to be related to the electric field relaxation at the tungsten wire tip.","PeriodicalId":306575,"journal":{"name":"2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114008662","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 : 2003-10-19DOI: 10.1109/CEIDP.2003.1254838
Y. Ho, Y. L. Chong, G. Chen
In this paper, the DC space charge measurement results obtained from 24 hours ageing of 1.2mm XLPE planar samples at 35 kV (/spl sim/30 kV/mm/sub dc/) with four different temperature conditions (i.e. 25/spl deg/C, 50/spl deg/C, 70/spl deg/C and 90/spl deg/C) are reported. Emphasis has been placed on comparing the space charge characteristics of the XLPE plaque at different temperatures under DC ageing conditions. The effects of sample degassing on space charge dynamics at different temperatures are also be presented.
本文报道了1.2mm XLPE平面样品在35 kV (/spl sim/30 kV/mm/sub DC /)下，在25/spl℃、50/spl℃、70/spl℃和90/spl℃四种不同温度条件下时效24小时的直流空间电荷测量结果。重点比较了直流老化条件下不同温度下XLPE斑块的空间电荷特性。讨论了不同温度下样品脱气对空间电荷动力学的影响。
{"title":"Temperature effect on the space charge characteristics in as-received and degassed XLPE insulation under DC stressing condition","authors":"Y. Ho, Y. L. Chong, G. Chen","doi":"10.1109/CEIDP.2003.1254838","DOIUrl":"https://doi.org/10.1109/CEIDP.2003.1254838","url":null,"abstract":"In this paper, the DC space charge measurement results obtained from 24 hours ageing of 1.2mm XLPE planar samples at 35 kV (/spl sim/30 kV/mm/sub dc/) with four different temperature conditions (i.e. 25/spl deg/C, 50/spl deg/C, 70/spl deg/C and 90/spl deg/C) are reported. Emphasis has been placed on comparing the space charge characteristics of the XLPE plaque at different temperatures under DC ageing conditions. The effects of sample degassing on space charge dynamics at different temperatures are also be presented.","PeriodicalId":306575,"journal":{"name":"2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115741241","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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