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IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena最新文献

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Effects of thermal and radiation stresses on elastomer properties 热和辐射应力对弹性体性能的影响
IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.641099
R. Clavreul
{"title":"Effects of thermal and radiation stresses on elastomer properties","authors":"R. Clavreul","doi":"10.1109/CEIDP.1997.641099","DOIUrl":"https://doi.org/10.1109/CEIDP.1997.641099","url":null,"abstract":"Ethylene Propylene Copolymer and Silicone are used as joints in electrical materials in nuclear power plants in France. In order to determine the elastomer service lifetime in normal and accidental conditions, we have studied the effects of thermal and radiation stresses applied to these materials. After accelerated aging tests, the mechanical properties such as elongation at break and tensile strength allowed us to appreciate the material service lifetime according to IEC 544-2. The lifetime prediction of Ethylene Propylene Copolymer and Silicone in normal conditions was estimated by applying a kinetic model where the constant depends on the Arrhenius law for thermal aging and the dose rate for radiation aging.","PeriodicalId":176239,"journal":{"name":"IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133657998","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
Partial discharge resistant mechanism of newly developed enameled wire 新研制的漆包线抗局部放电机理
IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.641123
T. Okamoto, K. Abe, Y. Itoh, T. Umemura
{"title":"Partial discharge resistant mechanism of newly developed enameled wire","authors":"T. Okamoto, K. Abe, Y. Itoh, T. Umemura","doi":"10.1109/CEIDP.1997.641123","DOIUrl":"https://doi.org/10.1109/CEIDP.1997.641123","url":null,"abstract":"A new enameled wire with inorganic additives has been developed. The wire is a double layered structure whose outer layer contains inorganic additives. It was shown that the new wire has good partial discharge endurance at power-frequency, leading to a lifetime improvement of about an order of magnitude. It was also found that the higher conductivity of the outer layer improved the partial discharge resistant nature owing to the decrease in partial discharge energies.","PeriodicalId":176239,"journal":{"name":"IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134023807","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
Application of relaxation current measurements to on-site diagnosis of power transformers 松弛电流测量在电力变压器现场诊断中的应用
IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.634555
V. der Houhanessian, W. Zaengl
{"title":"Application of relaxation current measurements to on-site diagnosis of power transformers","authors":"V. der Houhanessian, W. Zaengl","doi":"10.1109/CEIDP.1997.634555","DOIUrl":"https://doi.org/10.1109/CEIDP.1997.634555","url":null,"abstract":"Results of relaxation current measurements on impregnated pressboard samples and on multi-layer arrangements of pressboards in series with oil ducts are presented. The measurements have been performed dependent on the material properties of oil and pressboard and the volume ratio of these materials. Calculated values of related dielectric quantities such as tan/spl delta/ versus frequency, based on equivalent circuits obtained from relaxation currents are also shown. The relaxation currents of multi-layer test objects are calculated from the dielectric properties of the individual components and their geometrical capacitances. Finally, it is shown that relaxation currents of power transformers can easily be measured and their evolution can be described well by basic relations of linear dielectric theory.","PeriodicalId":176239,"journal":{"name":"IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134308350","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: 48
The effect of humidity on Langmuir-Blodgett films of phosphatidic acid (DPPA) and stearic acid (SA) 湿度对磷脂酸(DPPA)和硬脂酸(SA) Langmuir-Blodgett膜的影响
IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.634609
W. Fatani, R. Fouracre
{"title":"The effect of humidity on Langmuir-Blodgett films of phosphatidic acid (DPPA) and stearic acid (SA)","authors":"W. Fatani, R. Fouracre","doi":"10.1109/CEIDP.1997.634609","DOIUrl":"https://doi.org/10.1109/CEIDP.1997.634609","url":null,"abstract":"Four-layer Langmuir-Blodgett films of phosphatidic acid (polar) and stearic acid (non polar) have been prepared on glass substrates with aluminium electrodes. Dielectric measurements over the frequency range 5 Hz to 13 MHz showed plasticisation and DC conductivity effects when the films were exposed to changes in relative humidity.","PeriodicalId":176239,"journal":{"name":"IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134255670","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
Finite element modelling of the permittivity of lossy composite materials 有耗复合材料介电常数的有限元模拟
IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.634556
A. Boudida, A. Beroual, C. Brosseau
{"title":"Finite element modelling of the permittivity of lossy composite materials","authors":"A. Boudida, A. Beroual, C. Brosseau","doi":"10.1109/CEIDP.1997.634556","DOIUrl":"https://doi.org/10.1109/CEIDP.1997.634556","url":null,"abstract":"An ab initio numerical simulation model has been used to compute the complex effective dielectric constant of a two-component lossy composite material, in the quasistatic limit. A computational algorithm with a conventional finite element formulation solves Laplace's equation for a spatially heterogeneous medium, using the field calculation package FLUX3D. In this way, different three-dimensional topological arrangements of the components were considered. The composite material consists of dense spheres of uniform size that are arranged in simple, body-centered and face centered cubic lattices. A comparison with McLachlan's generalized effective medium equation is further provided over a wide range of conditions.","PeriodicalId":176239,"journal":{"name":"IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114787197","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
Basic consideration on electrical and nonelectrical surface stress factors influencing the insulating capability of a dielectric surface 影响介质表面绝缘性能的电气和非电气表面应力因素的基本考虑
IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.641100
D. Koenig, H. Kloes
{"title":"Basic consideration on electrical and nonelectrical surface stress factors influencing the insulating capability of a dielectric surface","authors":"D. Koenig, H. Kloes","doi":"10.1109/CEIDP.1997.641100","DOIUrl":"https://doi.org/10.1109/CEIDP.1997.641100","url":null,"abstract":"Summary form only given, as follows. This paper gives an overview on different stress factors and relevant aging of the surface of solid insulation applied in different types of electrical power apparatus. Depending on the kind of insulation system, different stress factors are dominating and responsible for the degradation of the surface of the solid insulating material. The amount of permissible electrical stress on the surface of an insulating solid depends on the type of the surrounding gas medium and its pressure. Such gases are atmospheric air under outdoor or indoor conditions or SF/sub 6/ under low or high pressure. The paper explains the different mechanisms and stages of surface insulation aging at different applications in the electrical power apparatus field.","PeriodicalId":176239,"journal":{"name":"IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"341 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116556400","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 titanium dioxide and carbon black on the high density polyethylene DC breakdown strength evaluated by Weibull distribution 用威布尔分布评价了二氧化钛和炭黑对高密度聚乙烯直流击穿强度的影响
IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.634587
M. Ueki, M. Zanin
{"title":"Influence of titanium dioxide and carbon black on the high density polyethylene DC breakdown strength evaluated by Weibull distribution","authors":"M. Ueki, M. Zanin","doi":"10.1109/CEIDP.1997.634587","DOIUrl":"https://doi.org/10.1109/CEIDP.1997.634587","url":null,"abstract":"In this work, we present results of the short-time dielectric breakdown test in high-density polyethylene with different pigment levels (titanium and carbon black). These pigments are commonly added in polyolefines used as insulation in medium voltage cables. The specimen thin films, were obtained by hot-compression from extruded material. For the dielectric breakdown test an automated system developed in this department was used. A voltage ramp of 500 V/sec was applied to specimens immersed in a silicon oil bath at room temperature. The results were analysed by the Weibull distribution. The shape and scale parameters of the Weibull distribution were calculated by Graphical and Maximum Likelihood methods and their values showed that titanium dioxide does not affect the breakdown voltage of HDPE and in order to obtain high dielectric strength insulation the carbon black level must be as low as possible.","PeriodicalId":176239,"journal":{"name":"IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125655807","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
Visualization of partial discharge burning voltage mechanism on contaminated surfaces 污染表面局部放电燃烧电压机制的可视化
IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.634632
M. Shwehdi, A. Farag, M. Izzularab
{"title":"Visualization of partial discharge burning voltage mechanism on contaminated surfaces","authors":"M. Shwehdi, A. Farag, M. Izzularab","doi":"10.1109/CEIDP.1997.634632","DOIUrl":"https://doi.org/10.1109/CEIDP.1997.634632","url":null,"abstract":"This paper presents a new visualization of the pre-flashover phase burning discharge and proposes a mathematical model which may describe the burning partial discharge mechanism phase. It also introduces the results of an experimental model simulation, carried at the KFUPM High Voltage Laboratory under AC voltages, to visualize the burning discharge voltage and its variation with different contaminated surfaces.","PeriodicalId":176239,"journal":{"name":"IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"405 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116030839","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
Sensitivity improvement of capacitive couplers for on-line partial discharge testing in rotating machines 旋转机械局部放电在线测试电容耦合器灵敏度的提高
IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.641129
H. Zhu, V. Green, M. Šašić, S. Haliburton
{"title":"Sensitivity improvement of capacitive couplers for on-line partial discharge testing in rotating machines","authors":"H. Zhu, V. Green, M. Šašić, S. Haliburton","doi":"10.1109/CEIDP.1997.641129","DOIUrl":"https://doi.org/10.1109/CEIDP.1997.641129","url":null,"abstract":"Capacitive couplers are widely used as sensors for on-line partial discharge (PD) monitoring of rotating machines. Capacitive couplers in conjunction with Partial Discharge Analyzers (PDA) can detect PD pulses from operating generators and motors without an interruption of machine operation. The capacitance of the couplers traditionally installed for PD detection on rotating machines has been 80 /spl rho/F. Recent research by Adwel International Ltd. has improved the PD detection obtained with capacitive couplers for some types of rotating machines. This paper begins with an introduction to on-line, or in-service, PD testing of large rotating machines. It includes some calculations and discussions on the frequency bandwidth to be used for in-service PD testing. In-service PD field test results taken from the same machine using both the traditional 80 /spl rho/F capacitive couplers and 500 /spl rho/F capacitive couplers are presented to show the increased effectiveness of higher capacitance couplers. PD field testing indicates that 500 /spl rho/F capacitive couplers have a higher sensitivity than 80 /spl rho/F capacitive couplers without introducing significant noise. They can be more suitable than 80 /spl rho/F capacitive couplers for PD measurements in smaller or lower-voltage rotating machines.","PeriodicalId":176239,"journal":{"name":"IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121147517","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
Leakage current magnitudes and waveshapes along polymer insulators 沿聚合物绝缘体的泄漏电流大小和波形
IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.641093
W. Tjokrodiponto, S. Sebo, J.D. Sakich, T. Zhao
{"title":"Leakage current magnitudes and waveshapes along polymer insulators","authors":"W. Tjokrodiponto, S. Sebo, J.D. Sakich, T. Zhao","doi":"10.1109/CEIDP.1997.641093","DOIUrl":"https://doi.org/10.1109/CEIDP.1997.641093","url":null,"abstract":"In order to analyze the development of the leakage currents along polymer insulators during artificial pollution tests, a test series was developed. Contaminated polymer insulators were tested in a fog chamber according to a predetermined cycle. Leakage current progress, waveshapes and their frequency contents were recorded and analyzed.","PeriodicalId":176239,"journal":{"name":"IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129035368","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
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