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1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena最新文献

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A new interpretation of the 'universal' dielectric response “通用”介电响应的新解释
1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1988-10-16 DOI: 10.1109/CEIDP.1988.26366
A. Jonscher
{"title":"A new interpretation of the 'universal' dielectric response","authors":"A. Jonscher","doi":"10.1109/CEIDP.1988.26366","DOIUrl":"https://doi.org/10.1109/CEIDP.1988.26366","url":null,"abstract":"The author presents a general interpretation of the 'universal' law of dielectric response in terms of an energy criterion in which the ratio of energy lost per cycle to energy stores at the peak of the alternating field is independent of frequency. Three types of 'universal' behavior prevailing in different areas of dielectric response are indicated which cover the behavior of both 'conventional' dielectric systems with dipolar and hopping charge polarization and certain semiconductor systems. Highly lossy and dispersive LFD (low-frequency dispersion) phenomena are interpreted on the same basis of constant loss per reversal of polarization in terms of electrochemical interactions.<<ETX>>","PeriodicalId":149735,"journal":{"name":"1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125978354","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
Equilibrium electrification parameters inferred from Couette charger terminal measurements 从Couette充电器终端测量推断的平衡电气化参数
1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1988-10-16 DOI: 10.1109/CEIDP.1988.26346
A. J. Morin, M. Zahn, J. Melcher
{"title":"Equilibrium electrification parameters inferred from Couette charger terminal measurements","authors":"A. J. Morin, M. Zahn, J. Melcher","doi":"10.1109/CEIDP.1988.26346","DOIUrl":"https://doi.org/10.1109/CEIDP.1988.26346","url":null,"abstract":"The authors consider the use of a compact Couette charger of coaxial cylinders to measure basic parameters in flow-induced electrification of oil/pressboard models of transformer insulation. They describe a method for obtaining both the turbulent core and wall charge densities by measuring either the terminal current in the short-circuit connection or the terminal voltage in the open-circuit connection between inner and outer metal cylinders. Theoretical considerations and experimental results are presented. Results obtained with the proposed technique are compared with those from the absolute charge sensor technique for measuring the charge density at the oil/cylinder interface.<<ETX>>","PeriodicalId":149735,"journal":{"name":"1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128493262","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
Relation between the halo and water trees in XLPE cables 交联聚乙烯电缆中光晕与水树的关系
1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1988-10-16 DOI: 10.1109/CEIDP.1988.26316
S. Pélissou
{"title":"Relation between the halo and water trees in XLPE cables","authors":"S. Pélissou","doi":"10.1109/CEIDP.1988.26316","DOIUrl":"https://doi.org/10.1109/CEIDP.1988.26316","url":null,"abstract":"The distribution of the halo or microcavity density across the insulation of steam-cured high-voltage XLPE (cross-linked polyethylene) cables was measured precisely by microphotometry and correlated with water-content measurements. The cable studied was the 138-kV type ( approximately=23-mm insulation wall) and had experienced several failures during its six years in service. The density of water trees over 80 mu m long is strongly related to the presence of the halo, i.e. high water-concentration regions. Shorter trees are located mostly in the middle of the insulation where the water content is very low. The halo is formed to act as a water reservoir, facilitating the growth of bow-tie trees. Heat treatment at a temperature higher than the XLPE melting point causes the halo to disappear totally, but not the water trees.<<ETX>>","PeriodicalId":149735,"journal":{"name":"1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128192087","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
On the relation between the cohesive energy density and the electric strength of solid polymer dielectrics 固体聚合物电介质内聚能密度与电强度的关系
1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1988-10-16 DOI: 10.1109/CEIDP.1988.26368
J. Crine, A. Vijh
{"title":"On the relation between the cohesive energy density and the electric strength of solid polymer dielectrics","authors":"J. Crine, A. Vijh","doi":"10.1109/CEIDP.1988.26368","DOIUrl":"https://doi.org/10.1109/CEIDP.1988.26368","url":null,"abstract":"The correlation between charge injection in polymeric dielectrics and their CED (cohesive energy density) is discussed. As an example, it is shown that the electroluminescence of various polymers also varies with their CED. Specifically, it is shown that the electric breakdown strength, the activation energy for conduction, the charge injection level, and the electroluminescence of various polymers vary with their CED, i.e. with their chemical and molecular structure. The practical significance of these observations is briefly discussed.<<ETX>>","PeriodicalId":149735,"journal":{"name":"1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129819782","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
Prebreakdown imaging in DC stressed n-hexane 直流应力正己烷的预击穿成像
1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1988-10-16 DOI: 10.1109/CEIDP.1988.26360
H. I. Marsden, P. McGrath
{"title":"Prebreakdown imaging in DC stressed n-hexane","authors":"H. I. Marsden, P. McGrath","doi":"10.1109/CEIDP.1988.26360","DOIUrl":"https://doi.org/10.1109/CEIDP.1988.26360","url":null,"abstract":"Sequential image recording obtained with the use of a high-sped framing camera was used to study the consequences of the DC stressing of n-hexane. It is observed that partial discharges, or conduction current pulses, produced by DC stressing are intimately related to the generation of prebreakdown streamers. The DC-induced events have characteristics that are similar to those produced by impulse voltages. In contrast to the impulse case, the absence of a displacement current for DC conditions allows the conduction current activity to be examined in detail. A demarcation is shown between streamer growth during the current wavefront and decay in the wavetail. The stepped nature of the current wavefront appears not to be related to the event profile, although it may be associated with the underlying discharge process.<<ETX>>","PeriodicalId":149735,"journal":{"name":"1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena","volume":"8 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129281458","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
Charge storage and charge decay in silicon dioxide 二氧化硅中的电荷储存和电荷衰减
1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1988-10-16 DOI: 10.1109/CEIDP.1988.26335
P. Gunther, G. Sessler
{"title":"Charge storage and charge decay in silicon dioxide","authors":"P. Gunther, G. Sessler","doi":"10.1109/CEIDP.1988.26335","DOIUrl":"https://doi.org/10.1109/CEIDP.1988.26335","url":null,"abstract":"SiO/sub 2/ layers with thicknesses between 150 nm and 2.5 mu m were either thermally grown or made by chemical vapour deposition on 2-inch p-type silicon wafers. Positive or negative charging of the samples was performed by liquid-contact, corona, and electron-beam methods. The decay of the surface potential was observed isothermally at room temperature and at 350 degrees C or by a thermally stimulated discharge (TSD) method at linearly increasing temperature. In the isothermal measurements, positively charged samples showed a somewhat faster decay than negatively charged ones. The decays can be interpreted with a simple theory based on carrier drift and compensation by conductivity. TSD peaks of negatively charged material occur at temperatures higher than those of positively charged samples. Activation energies of 1.0 and 1.4 eV for positively charged oxides and 1.9 eV for negatively charged oxides were found.<<ETX>>","PeriodicalId":149735,"journal":{"name":"1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114157196","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
Dielectric properties of diblock copolymers 二嵌段共聚物的介电性能
1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1988-10-16 DOI: 10.1109/CEIDP.1988.26365
G. Johnson, E. Anderson, X. Quan, F. Bates
{"title":"Dielectric properties of diblock copolymers","authors":"G. Johnson, E. Anderson, X. Quan, F. Bates","doi":"10.1109/CEIDP.1988.26365","DOIUrl":"https://doi.org/10.1109/CEIDP.1988.26365","url":null,"abstract":"Dielectric spectroscopy was used to probe a series of diblock copolymers which have widely different degrees of order. The 1,2-polybutadiene/1,4-polybutadiene diblock copolymer system was chosen because both ordered and disordered morphologies can be obtained near room temperature. It is observed that the local motions of the high-temperature component are greatly enhanced in the block copolymer over the homopolymer. Als found is evidence of local concentration fluctuations of the low-temperature component which are large enough to exhibit a glass transition, even in samples that appear to be completely disordered on the length scales probed by SANS and rheological measurements.<<ETX>>","PeriodicalId":149735,"journal":{"name":"1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116734233","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
Measurement of partial discharges in hexane under DC voltage 直流电压下己烷局部放电的测量
1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1988-10-16 DOI: 10.1109/CEIDP.1988.26364
E. Kelley, M. Nehmadi, R. Hebner, M. Pace, A. Wintenberg, T. V. Blalock, J. Foust
{"title":"Measurement of partial discharges in hexane under DC voltage","authors":"E. Kelley, M. Nehmadi, R. Hebner, M. Pace, A. Wintenberg, T. V. Blalock, J. Foust","doi":"10.1109/CEIDP.1988.26364","DOIUrl":"https://doi.org/10.1109/CEIDP.1988.26364","url":null,"abstract":"The very few stages of the low-density region (LDR) at an electrode in hexane are recorded by high-magnification, high-speed photography and low-noise electronics to determine the relationship between the inception and growth of the LDR and the current. Observations of the initiation phase of the LDR are made by an image-preserving optical delay which permits photography of unpredictable events after their occurrence. The current is monitored by a special low-noise preamplifier which also provides timing signals to the photographic system. The current producing the LDR is in the form of a growing pulse train which is in contrast to the linear growth observed in the LDR. It is concluded that the same considerations which explained the absence of an LDR in nitrobenzene can be used to explain the initiation of the LDR in the present investigation.<<ETX>>","PeriodicalId":149735,"journal":{"name":"1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125741782","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: 37
Discharges on insulator surfaces after voltage reversal 电压反转后绝缘子表面的放电
1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1988-10-16 DOI: 10.1109/CEIDP.1988.26362
H. Kliem, A. Heßler, G. Arlt
{"title":"Discharges on insulator surfaces after voltage reversal","authors":"H. Kliem, A. Heßler, G. Arlt","doi":"10.1109/CEIDP.1988.26362","DOIUrl":"https://doi.org/10.1109/CEIDP.1988.26362","url":null,"abstract":"An avalanche effect along insulator surfaces in a metal-insulator-metal structure was studied experimentally. A physical model is proposed to explain the observed current spikes. According to this model, during negative poling, voltage corona charging from the edge of the electrode to the neighboring insulator surface occurs. The charges are trapped in surface states. The voltage ramp releases these charges in opposite directions by coulombic attraction. The charges are then accelerated towards the electrode and initiate an avalanche. The waiting time t/sub w/ influences the threshold voltage in a specified way. The trapped charges seem to increase their own trap depth during t/sub w/.<<ETX>>","PeriodicalId":149735,"journal":{"name":"1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131293400","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
Light emission and subsequent tree inception due to polarity reversal of the local field in polymeric insulation 光发射和随后的树开始由于极性反转的局部场在聚合物绝缘
1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1988-10-16 DOI: 10.1109/CEIDP.1988.26328
S. Bamji, A. Bulinski, R. Densley
{"title":"Light emission and subsequent tree inception due to polarity reversal of the local field in polymeric insulation","authors":"S. Bamji, A. Bulinski, R. Densley","doi":"10.1109/CEIDP.1988.26328","DOIUrl":"https://doi.org/10.1109/CEIDP.1988.26328","url":null,"abstract":"The authors describe the treeing characteristics of normal and degassed low-density polyethylene under AC, DC, and half-rectified AC voltages. By individually controlling the amplitudes of the positive and negative half-cycles of the AC voltage, it is shown that the polarity reversal of the local field in the polymer plays a crucial role for light emission and subsequent tree inception. If light is not emitted, then treeing does not occur, because it is impossible for the unipolar injected charge to gain sufficient energy to cause impact ionization or break bonds of the polymer chain. The injection of electrons and holes and their recombination at luminescent centers gives rise to light having spectra in the visible and the UV (ultraviolet) ranges. The UV light photodegrades the polymer and leads to the formation of an electrical tree.<<ETX>>","PeriodicalId":149735,"journal":{"name":"1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128822188","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
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