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Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986最新文献

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Effect of elongation on electrical conduction of polyethylene 伸长率对聚乙烯导电性能的影响
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726444
M. Masui, H. Nagasaka
{"title":"Effect of elongation on electrical conduction of polyethylene","authors":"M. Masui, H. Nagasaka","doi":"10.1109/CEIDP.1986.7726444","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726444","url":null,"abstract":"It is known that the orientation of polymer chains due to elongation, changes the electrical properties.(1)However the mechanism of the electrical conduction is not completely clear, especially concerning the relationship between its super-structure and electrical conduction. Amborski reported the decrease of electrical conductivity as a result of uniaxial and biaxial elongation in polyethylene terephthalate.(2) This paper deals with the effect of uniaxial elongation on electrical conduction and the apparent activation energy, as well as changes of morphology under the condition of elongation in high diensity polyethylene and low density polyethylene.","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117270992","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
Oxidation and water treeing in XLPE cable insulation 交联聚乙烯电缆绝缘中的氧化和水树
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726475
A. Garton, S. Bamji, A. Bulinski, J. Densley
{"title":"Oxidation and water treeing in XLPE cable insulation","authors":"A. Garton, S. Bamji, A. Bulinski, J. Densley","doi":"10.1109/CEIDP.1986.7726475","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726475","url":null,"abstract":"It is well known that polymer insulated high-voltage cables experience a form of degradation in service referred to as water treeing. Small tree-like growths consisting of water-filled microvoids, slowly grow in an electrically stressed insulation exposed to moisture causing a reduction in the breakdown strength. Although the subject of water treeing has been studied extensively for at least ten years, the mechanisms of treeing and how the trees lead to breakdown are not well understood. The role of oxidative degradation on the initiation and growth of water trees and the final breakdown of the insulation is not clear. At this conference last year it was hypothesized that the decomposition of hydroperoxides formed during oxidation was a major factor in the treeing process [l]. However these authors did not measure polymer oxidation directly. Bernstein et at.[2] could not find any significant difference in the level of oxidation between treed and non-treed polyethylene taken from miniature cables. This paper describes some results of an investigation into the oxidation levels of XLPE cable insulation removed from field and laboratory-aged cables. The oxidation was measured by Fourier Transform Infrared Spectroscopy (FTIR) and Oxidation Induction Time analysis (OIT).","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126668424","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
Photoconductivity of PVK-ZnO(RhB) system PVK-ZnO(RhB)体系的光电导率
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726435
H. Zhang, W. Yin, D. Pan, X. Jin, G. G. Zhang, S. G. Min
{"title":"Photoconductivity of PVK-ZnO(RhB) system","authors":"H. Zhang, W. Yin, D. Pan, X. Jin, G. G. Zhang, S. G. Min","doi":"10.1109/CEIDP.1986.7726435","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726435","url":null,"abstract":"ZnO-resin photoreceptor has become more important in recent years with increased demand for plain paper copy and xerography. The photocarrier in this system mainly consists of electrons, hole being usually immobile which results in space charge accumulation, with the increase of residual potential and decrease of life. It is suggested that such effects could be reduced in ambipolar materials where the simultaneous derealization of both electrons and holes leads to the elimination of space charges. As we know, ZnO is n-type photoconductor, and PVK is of p-type. Besides, it was demonstrated that the surface states of micro-crystalline ZnO can strongly interact with the matrix polymer of PVK, indicating the possibility of lowering the surface barrier of ZnO and promotion of hole generation in PVK. Therefore, we choose PVK_ZnO(RhB) system as an object of study.","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123110659","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
Suppression of static electrification of insulating oil for large power transformers 大型电力变压器绝缘油的静电抑制
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/14.2349
Masayuki Ieda, H. Okugo, Hideo Tsukioka, K. Goto, T. Miyamoto, Y. Kohno
{"title":"Suppression of static electrification of insulating oil for large power transformers","authors":"Masayuki Ieda, H. Okugo, Hideo Tsukioka, K. Goto, T. Miyamoto, Y. Kohno","doi":"10.1109/14.2349","DOIUrl":"https://doi.org/10.1109/14.2349","url":null,"abstract":"Streaming electrification in transformers occurs at the interface between the insulating oil and the insulating material as the oil circulates in the transformer. As a result, the insulating oil and the surface of the solid materials become charged and dielectric breakdown is possible within the oil or at the interface of insulating materials.","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115286339","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: 66
Effect of contact area and the number of parallel insulators on the flashover voltage in compressed gases 接触面积和平行绝缘子数目对压缩气体中闪络电压的影响
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726497
M. Rizk, R. Hackam
{"title":"Effect of contact area and the number of parallel insulators on the flashover voltage in compressed gases","authors":"M. Rizk, R. Hackam","doi":"10.1109/CEIDP.1986.7726497","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726497","url":null,"abstract":"Solid insulators (spacers) have been used as physical support of high voltage conductors in compressed gas insulated system (GIS) [1-2]. The design of an insulation system often requires multiple spacers in parallel. As the number of spacers increases, the possibility of the presence of weak points increases, and the probability of an electrical breakdown of the system increases [3]. It is important to study the influence of the number of parallel insulators on the breakdown voltage of the system. There is insufficient data on the effect of the surface flashover of varying the insulator diameter and the number of parallel insulators in high pressures of SF6 and N2. The dependence of the flashover on the contact area of the spacer is required in the design of insulating systems. This is because as the spacer area is varied, the capacitance and therefore the energy stored in the gap which affects the dielectric strength of the insulation is also varied.","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116562525","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
Comparison of high temperature breakdown behaviour in low and high density polyethylene 低密度和高密度聚乙烯高温击穿行为的比较
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726498
G. Lessard, S. Pélissou, H. St-Onge, M. Wertheimer
{"title":"Comparison of high temperature breakdown behaviour in low and high density polyethylene","authors":"G. Lessard, S. Pélissou, H. St-Onge, M. Wertheimer","doi":"10.1109/CEIDP.1986.7726498","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726498","url":null,"abstract":"A better understanding of high temperature dielectric properties of polyethylene is needed to improve its performance as insulation in underground power cables. In this paper we present new data on the electrical breakdown strength, Eb, of high density polyethylene (HDPE) measured between 23 and 160°C. These results are compared with those of low density polyethylene (LDPE) [1], and the combined data are discussed in the framework of a recently proposed model of electrical breakdown [1-2].","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123777284","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
Influence of the manufacturing process of LDPE on the build up of a space charge distribution under electric stress LDPE制造工艺对电应力下空间电荷分布形成的影响
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726443
F. Chapeau, C. Alquié, J. Lewiner, H. Auclair, R. Jocteur
{"title":"Influence of the manufacturing process of LDPE on the build up of a space charge distribution under electric stress","authors":"F. Chapeau, C. Alquié, J. Lewiner, H. Auclair, R. Jocteur","doi":"10.1109/CEIDP.1986.7726443","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726443","url":null,"abstract":"In the last ten years, considerable interest has arisen for the use of polymeric materials as high voltage insulators. Polyethylene appears as one of the most promising materials and is already widely used, for instance in DC high voltage (HV) cables.","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133361416","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
Simultaneous thermally stimulated depolarization conductivity and luminescence in polyethylene 聚乙烯的热激退极化电导率和发光特性
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726422
A. Markiewicz, R. Fleming
{"title":"Simultaneous thermally stimulated depolarization conductivity and luminescence in polyethylene","authors":"A. Markiewicz, R. Fleming","doi":"10.1109/CEIDP.1986.7726422","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726422","url":null,"abstract":"Thermally stimulated depolarization (TSD), conductivity (TSC) and luminescence (TSL) are now firmly established as experimental techniques for the study of charge trapping and movement in solid dielectrics. However, TSD/TSL and TSC/TSL should be measured simultaneously on the same sample in order to maximise the information which can be drawn from the data; unfortunately few authors have reported simultaneous measurements. In this paper we present the results of simultaneous measurement of TSD/TSL and TSC/TSL on low density polyethylene samples X-irradiated in vacuum at liquid nitrogen temperature and subsequently heated to room temperature. In order to investigate the possible role of carbonyl (C = 0) groups in electron trapping, some samples were exposed to an oxygen/ozone mixture at 40°C and the resulting changes in the glow-curves noted. We also heated some samples to 100°C, before X-irradiating them at liquid nitrogen temperature, in order to investigate the possible dependence of the electron trapping sites on the morphology of the samples.","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116120492","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
Static electrification properties of transformer oil 变压器油的静电特性
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/14.2345
T. Oommen
{"title":"Static electrification properties of transformer oil","authors":"T. Oommen","doi":"10.1109/14.2345","DOIUrl":"https://doi.org/10.1109/14.2345","url":null,"abstract":"In recent years much attention has been given to oil flow in power transformers with cellulosic insulation, due to the failure of some field units from discharges resulting from charge accumulation. Charge separation is a function of several factors: nature of oil, flow velocity, type of solid insulation, surface conditions, duct space, insulation geometry, temperature, and the presence of ionic impurities and charge producing species in the oil. This paper focuses on the role of transformer oil in the charge separation process.","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122218048","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: 63
Dielectric study of the curing process in crosslinked polymers 交联聚合物固化过程的介电介质研究
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726485
G. Johnson, E. Anderson, H. Bair, S. Matsuoka
{"title":"Dielectric study of the curing process in crosslinked polymers","authors":"G. Johnson, E. Anderson, H. Bair, S. Matsuoka","doi":"10.1109/CEIDP.1986.7726485","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726485","url":null,"abstract":"During the final stage of the crosslinking process for polymers such as with epoxy systems, the polymer becomes apparently glassy, and the reaction is markedly slowed as compared to the early stage, but continues in the manner consistent with the familiar enthalpic relaxation process during physical aging of polymeric glasses. Dielectric measurements are made on the epoxy system during this “relaxation time-controlled” crosslinking process, in order to monitor the extent of reaction and to predict the physical properties of the resulting polymeric glass.","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131772139","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
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