发布求助
文献互助 智能选刊 最新文献

Conference on Electrical Insulation and Dielectric Phenomena,最新文献

筛选
英文 中文
Transient voltage and injection in insulators 绝缘子的瞬态电压和注入
Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1989-10-29 DOI: 10.1109/CEIDP.1989.69567
R. Coelho, L. Levy, D. Sarrail
{"title":"Transient voltage and injection in insulators","authors":"R. Coelho, L. Levy, D. Sarrail","doi":"10.1109/CEIDP.1989.69567","DOIUrl":"https://doi.org/10.1109/CEIDP.1989.69567","url":null,"abstract":"The authors discuss 'local' models applicable to thin samples in which the injected charge density exceeds the intrinsic one. Experimental results are presented on such 'electrically inhomogeneous' samples. The experiment was performed on a Kapton sample in a space simulation chamber. The constant mobility hypothesis is valid provided that the initial field across the sample does not exceed some critical value. Comparison of the decay curves for bulk and surface charges permits an evaluation of the injection coefficient and its evolution. This in turn may help to improve the understanding of injection processes in dielectric materials, and to assess the effects of surface treatments.<<ETX>>","PeriodicalId":10719,"journal":{"name":"Conference on Electrical Insulation and Dielectric Phenomena,","volume":"5 1","pages":"327-331"},"PeriodicalIF":0.0,"publicationDate":"1989-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72732740","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
Charge buildup in polypropylene irradiated with monoenergetic electron beams 单能电子束辐照聚丙烯中的电荷积聚
Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1989-10-29 DOI: 10.1109/CEIDP.1989.69547
H. Ding, G. Sessler
{"title":"Charge buildup in polypropylene irradiated with monoenergetic electron beams","authors":"H. Ding, G. Sessler","doi":"10.1109/CEIDP.1989.69547","DOIUrl":"https://doi.org/10.1109/CEIDP.1989.69547","url":null,"abstract":"Charge buildup in 30- mu m-thick films of polypropylene irradiated with monoenergetic electron beams of 10-45-keV energy is investigated. Using the split-Faraday cup, the mean charge depths at the beginning of electron injection, at the termination of injection, and 10 minutes after injection are measured. It is found that the depth increases with time during and after charging and depends on the 1.7th power of the electron energy. The depth increases also with the amount of injected charge. From the dynamics of charge motion during irradiation, the tradition-induced conductivity is determined a function of dose rate. It amounts to approximately 10/sup -14/ ( Omega .cm)/sup -1/ at 10/sup 4/ rad/s and is thus about an order of magnitude smaller than in Teflon.<<ETX>>","PeriodicalId":10719,"journal":{"name":"Conference on Electrical Insulation and Dielectric Phenomena,","volume":"1 1","pages":"204-209"},"PeriodicalIF":0.0,"publicationDate":"1989-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74592975","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: 4
Pressure effects on partial discharges in hexane under DC voltage 直流电压下压力对正己烷局部放电的影响
Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1989-10-29 DOI: 10.1109/CEIDP.1989.69528
M. Pace, A. Wintenberg, T. V. Blalock, E. Kelley, G. FitzPatrick, C. Fenimore, H. Yamashita
{"title":"Pressure effects on partial discharges in hexane under DC voltage","authors":"M. Pace, A. Wintenberg, T. V. Blalock, E. Kelley, G. FitzPatrick, C. Fenimore, H. Yamashita","doi":"10.1109/CEIDP.1989.69528","DOIUrl":"https://doi.org/10.1109/CEIDP.1989.69528","url":null,"abstract":"The pressure dependence of partial discharges (PD) has been experimentally investigated at a needle electrode in hexane from subatmospheric pressure (near hexane vapor pressure) to several atmospheres. Each PD produces a phase transition in the liquid near the needle, which is photographed in synchronism with a characteristic pattern of current pulses. An image-preserving optical delay allows photography to commence just before or at inception of the discharge. Individual current pulses comprising a characteristic pattern are resolved. The cathode event consists of a short pressure-insensitive inception phase, a pressure-sensitive growth at a decreasing rate, and finally a detachment and dissipation, sometimes with noticeable contraction before detachment; increased pressure reduces the growth rate and lifetime. The accompanying characteristic current pulse pattern always ceases during the growth of the PD. For the anode event, less extensive data similarly show slowing of growth with increased pressure and a (different) characteristic current pulse pattern.<<ETX>>","PeriodicalId":10719,"journal":{"name":"Conference on Electrical Insulation and Dielectric Phenomena,","volume":"222 1","pages":"87-92"},"PeriodicalIF":0.0,"publicationDate":"1989-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75040868","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: 6
Determination of sparking voltage and residual voltage of a void included in an electrical insulation system 电绝缘系统中空隙的火花电压和剩余电压的测定
Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1989-10-29 DOI: 10.1109/CEIDP.1989.69530
Ren Peiyu, Zhong Guangming
{"title":"Determination of sparking voltage and residual voltage of a void included in an electrical insulation system","authors":"Ren Peiyu, Zhong Guangming","doi":"10.1109/CEIDP.1989.69530","DOIUrl":"https://doi.org/10.1109/CEIDP.1989.69530","url":null,"abstract":"An approach is developed which can be used to calculate the sparking and residual voltages V/sub s/ and V/sub r/, or the ratio between them, from the corner values V/sub p/ and V/sub q/ in a parallelogram. From a theoretical analysis of the parallelogram method, which is used for partial-discharge measurement, the width of the parallelogram is equal to the sum of the partial discharge inception voltage plus the voltage that equals the residual voltage of a void multiplied by a factor of 1+C/sub c//C/sub b/. If the sparking voltage is approximately equal to the residual voltage, the width of the parallelogram is approximately equal to the partial-discharge inception voltage multiplied by 2 square root 2. V/sub s/ and V/sub r/, or V/sub r//V/sub s/, can also be calculated from the corner parameters of parallelograms.<<ETX>>","PeriodicalId":10719,"journal":{"name":"Conference on Electrical Insulation and Dielectric Phenomena,","volume":"144 1","pages":"99-104"},"PeriodicalIF":0.0,"publicationDate":"1989-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72846407","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
Influence of paper insulation on acceptable gas-in-oil levels in transformers 纸绝缘对变压器可接受油中气体含量的影响
Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1989-10-29 DOI: 10.1109/CEIDP.1989.69572
M. Duval, F. Langdeau, P. Gervais, G. Bélanger
{"title":"Influence of paper insulation on acceptable gas-in-oil levels in transformers","authors":"M. Duval, F. Langdeau, P. Gervais, G. Bélanger","doi":"10.1109/CEIDP.1989.69572","DOIUrl":"https://doi.org/10.1109/CEIDP.1989.69572","url":null,"abstract":"The influence of cellulose on acceptable gas-in-oil levels in high-voltage transformers as indicated by the value of the CO/sub 2//CO ratio is assessed by means of dissolved-gas analysis. The results presented here are based on 6932 gas-in-oil analyses on 1320 Hydro-Quebec transformers over a period of 20 years. Preliminary results indicate that C/sub 2/H/sub 4/ levels are affected by cellulose participation for both arcing and hot spots. The effect can be felt starting from CO/sub 2//CO ratios <6 for arcing and <2 for hot spots. These results suggest that the acceptable and dangerous levels of dissolved C/sub 2/H/sub 4/ in power transformers must be greatly reduced as the CO/sub 2//CO ratio in the oil decreases.<<ETX>>","PeriodicalId":10719,"journal":{"name":"Conference on Electrical Insulation and Dielectric Phenomena,","volume":"27 1","pages":"358-362"},"PeriodicalIF":0.0,"publicationDate":"1989-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86841632","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: 13
Partial discharge characteristics of gas impregnated polymeric insulation systems 气体浸渍聚合物绝缘系统的局部放电特性
Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1989-10-29 DOI: 10.1109/CEIDP.1989.69533
G. Letha, A. Venkatasami, T. Govindan
{"title":"Partial discharge characteristics of gas impregnated polymeric insulation systems","authors":"G. Letha, A. Venkatasami, T. Govindan","doi":"10.1109/CEIDP.1989.69533","DOIUrl":"https://doi.org/10.1109/CEIDP.1989.69533","url":null,"abstract":"Experimental investigations conducted on a large number of experimental model samples made with polypropylene film and impregnated with SF/sub 6/ are reported. Samples and experiments were designed to identify and highlight the effects of critical factors, such as electrode material and configuration, winding tension, gas filling pressure, and impregnation cycle, on the partial-discharge behavior of the samples. It is noted that the results could serve as useful design data for the design of SF/sub 6/-filled high-voltage equipment using polypropylene film in particular and any plastic film in general.<<ETX>>","PeriodicalId":10719,"journal":{"name":"Conference on Electrical Insulation and Dielectric Phenomena,","volume":"58 3 1","pages":"117-124"},"PeriodicalIF":0.0,"publicationDate":"1989-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83695711","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
Theoretical analysis for rapid thermal endurance methods of insulating materials 绝缘材料快速热耐久方法的理论分析
Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1989-10-29 DOI: 10.1109/CEIDP.1989.69543
Z. Yingsuo, Bai Yi
{"title":"Theoretical analysis for rapid thermal endurance methods of insulating materials","authors":"Z. Yingsuo, Bai Yi","doi":"10.1109/CEIDP.1989.69543","DOIUrl":"https://doi.org/10.1109/CEIDP.1989.69543","url":null,"abstract":"The authors show by analysis and examples that the rapid thermal endurance testing methods of insulating materials are all approximate and simulations, in spite of the fact that some seem to have a strictly mathematical derivation or theoretical demonstration. It is suggested that the merits of the rapid methods should be evaluated by comparing test results with conventional aging.<<ETX>>","PeriodicalId":10719,"journal":{"name":"Conference on Electrical Insulation and Dielectric Phenomena,","volume":"15 1","pages":"180-185"},"PeriodicalIF":0.0,"publicationDate":"1989-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82612211","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
Electrical conduction phenomena of oil/polymer systems 油/聚合物体系的导电现象
Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1989-10-29 DOI: 10.1109/CEIDP.1989.69570
S. Ochiai, H. Iwasaki, T. Mizutani, M. Ieda
{"title":"Electrical conduction phenomena of oil/polymer systems","authors":"S. Ochiai, H. Iwasaki, T. Mizutani, M. Ieda","doi":"10.1109/CEIDP.1989.69570","DOIUrl":"https://doi.org/10.1109/CEIDP.1989.69570","url":null,"abstract":"Oil-polymer interactions were investigated using various combinations of polymer and oil. The current magnitudes in oil-polymer systems were in the following order: LDPE>HDPE>PP>PET>>FEP. These results are discussed, considering the solubility parameter (SP), the crystallinity of the polymer, and impurities in the polymer. It was found that the magnitude of the charging current in oil-polymer systems cannot be explained by the SP value alone. It is affected by impurities in the polymer (including antioxidant) close to the oil-polymer interface. Antioxidant is extracted from the polymer during sulfuric acid treatment. The treatment of sulfuric acid reduces the current and changes the TSC (thermally stimulated current) spectrum.<<ETX>>","PeriodicalId":10719,"journal":{"name":"Conference on Electrical Insulation and Dielectric Phenomena,","volume":"17 1","pages":"346-351"},"PeriodicalIF":0.0,"publicationDate":"1989-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78767508","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
Gamma irradiation effects in two epoxy resins and a polyimide 两种环氧树脂和一种聚酰亚胺的辐照效应
Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1989-10-29 DOI: 10.1109/CEIDP.1989.69546
R. Fouracre, H. M. Banford, D. Tedford, W. Huiming, X. Cao
{"title":"Gamma irradiation effects in two epoxy resins and a polyimide","authors":"R. Fouracre, H. M. Banford, D. Tedford, W. Huiming, X. Cao","doi":"10.1109/CEIDP.1989.69546","DOIUrl":"https://doi.org/10.1109/CEIDP.1989.69546","url":null,"abstract":"Changes in the electrical properties of insulators exposed to high levels of ionizing radiation can have a significant effect on the lifetime of equipment incorporating such material. In order to obtain a knowledge of the processes involved, a series of experiments were undertaken on the effects of gamma irradiation, at dose levels up to a few megagrays (MGy), on the DC conductivity and the thermally stimulated discharge current (TSDC) spectra of two epoxy resin samples and a polyimide. Among other findings it is shown that the curves for DC conductivity can be used to measure the glass transition temperature T/sub G/. Initial differential scanning calorimetry measurements had shown that the T/sub G/ of the as-produced resin was 189 degrees C. Irradiation to 1 MGy reduced this value to 90 degrees C, and this was little changed by annealing. The activation energy below T/sub G/ decreased as a sequence of irradiation, but increased after annealing of the sample. Comparison with the TSDC spectra shows that the T/sub G/ of the system is lowered by the irradiation process, and it has also been shown that annealing increases the T/sub G/, although at this dose level it does not return to its original value. Measurements on polyimide indicate that there is a change in conduction mechanism after irradiation.<<ETX>>","PeriodicalId":10719,"journal":{"name":"Conference on Electrical Insulation and Dielectric Phenomena,","volume":"6 1","pages":"198-203"},"PeriodicalIF":0.0,"publicationDate":"1989-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85481030","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
The high field conductivity in organosilicon plasma polymers 有机硅等离子体聚合物的高场导电性
Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1989-10-29 DOI: 10.1109/CEIDP.1989.69561
P. Kazimierski, M. Kryszewski, J. Tyczkowski
{"title":"The high field conductivity in organosilicon plasma polymers","authors":"P. Kazimierski, M. Kryszewski, J. Tyczkowski","doi":"10.1109/CEIDP.1989.69561","DOIUrl":"https://doi.org/10.1109/CEIDP.1989.69561","url":null,"abstract":"The electrical conductivity by electron hopping in the case of high electric fields is discussed with special attention to the Poole-Frenkel generation mechanism. Computer simulations of charge carriers tunneling between different kinds of localized states are presented. The model consequence is the existence of the exp(F/F/sub 0/) term in high-field direct current. These theoretical results are supported by measurements of current versus voltage characteristics for thin films of plasma polymers obtained by glow discharge in vapors of different organosilicon monomers. The present model also implies the existence of temperature-independent direct current in the case of sufficiently high electric fields.<<ETX>>","PeriodicalId":10719,"journal":{"name":"Conference on Electrical Insulation and Dielectric Phenomena,","volume":"38 1","pages":"290-295"},"PeriodicalIF":0.0,"publicationDate":"1989-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83238810","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信