1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)最新文献

Effect of acetophenone on the space charge evolution in LDPE and LLDPE 苯乙酮对LDPE和LLDPE中空间电荷演化的影响

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-12-01 DOI: 10.1109/CEIDP.1999.804585

K. Kobayashi, T. Ohara, Y. Ohki, T. Maeno

引用次数: 11

Space charge distribution measurement in XLPE cable for detection of the water tree location XLPE电缆中空间电荷分布测量，用于检测水树位置

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-12-01 DOI: 10.1109/CEIDP.1999.807884

K. Suzuki, Y. Tanaka, T. Takada, Y. Ohki, C. Takeya

引用次数: 2

Conductivity and permittivity of water tree in polyethylene 聚乙烯中水树的电导率和介电常数

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-12-01 DOI: 10.1109/CEIDP.1999.807871

T. Toyoda, S. Mukai, Yoshimichi Ohki, Y. Li, Takashi Maeno

引用次数: 10

Behavior of water droplet on polymer material and the influence on discharge characteristics 水滴在高分子材料上的行为及其对放电特性的影响

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807833

N. Arise, H. Nishioka, Y. Okraku-Yienkyi, M. Otsubo, C. Honda

引用次数: 5

Effect of aging on the microstructure evolution, thermal and mechanical properties of mica/epoxy composite 时效对云母/环氧复合材料组织演变、热性能和力学性能的影响

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807861

Hee-Dong Kim, Y. Ju, H. Rhew

引用次数: 5

Confining effects in dielectric relaxations of water aggregates in rock samples from a lithological contact at two different locations (Northeastern Venezuela) 两个不同地点(委内瑞拉东北部)岩性接触岩石样品中水聚集体介电弛豫的限制效应

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804602

N. Suárez, K. Aldana, V. Costanzo-Álvarez

{"title":"Confining effects in dielectric relaxations of water aggregates in rock samples from a lithological contact at two different locations (Northeastern Venezuela)","authors":"N. Suárez, K. Aldana, V. Costanzo-Álvarez","doi":"10.1109/CEIDP.1999.804602","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.804602","url":null,"abstract":"Thermal stimulated depolarization currents (TSDC), natural remanent magnetization (NRM) and scanning electron microscopy (SEM) measurements have been used here to study the confining effects of water aggregates of porous samples from a lithological contact at two sedimentary sequences from Cretaceous Northeastern Venezuela. The contact was dielectrically characterized by the TSDC technique. Two different locations were studied and the magnetic and dielectric results were correlated. Drying and rehydration treatments performed on these samples indicate that these peaks could be associated with physisorbed moisture. The dielectric relaxation peaks, located from 200 to 320 K, were related to water clusters confined In the pores. The direct signal analysis (DSA method) was applied to find the mean overlapping processes and the characteristic relaxations parameters. The pore dimension was determined from SEM microphotographs. Above the contact, a confining effect is observed and the peaks move towards lower temperatures as the pore size diminishes. Below the contact, as the pore sizes increase, adsorption effects mainly control these relaxations. The interaction between the clusters and the pore surface is mainly due to hydrogen bonding via terminal OH groups. Due to the change in the environment seen by the adsorbed water molecules, a variation in the mean reorientation energy is observed as the contact is approached, in the same lithological zone where NRM anomalies have been reported.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121140416","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

Space charge injection and extraction in high divergent fields 高发散场空间电荷注入与提取

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804584

L. Dissado, O. Paris, T. Ditchi, C. Alquié, J. Lewiner

引用次数: 0

Investigation the effect of environmental factors on the performance of polymeric outdoor insulation 研究了环境因素对高分子室外保温材料性能的影响

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807912

M. Uğur, A. Kuntman, A. Merev

{"title":"Investigation the effect of environmental factors on the performance of polymeric outdoor insulation","authors":"M. Uğur, A. Kuntman, A. Merev","doi":"10.1109/CEIDP.1999.807912","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.807912","url":null,"abstract":"Surface tracking is one of the severe degradation mechanisms observed on polymeric insulators. There are too many factors associated with the degradation process, hence it is not easy to make an estimate about the useful service life of an insulator. However it is possible to reduce the variability observed in the tracking initiation times and tracking patterns by testing the samples in laboratory under predefined conditions (4 kV applied voltage and 36 ml/h flow rate of liquid). In this study, by using the ASTM D 2303 Inclined Plane Tracking Test method the effects of longitudinal compressive and tensile stress, ultraviolet (UV) radiation and wind pressure from different positions with respect to the surface of the sample under test have been investigated in detail. All samples have been prepared by using polyester resin without any accelerator. In all cases tracking initiation times were reduced significantly depending on the external conditions. UV radiation and wind pressure caused bushy type carbonised tracking patterns with wide branches around the high voltage electrode.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125420750","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

Accelerated corona discharge performance of polymer compounds used in high voltage outdoor insulators 高压室外绝缘子用高分子化合物的加速电晕放电性能

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807909

V. Moreno, R. Gorur

{"title":"Accelerated corona discharge performance of polymer compounds used in high voltage outdoor insulators","authors":"V. Moreno, R. Gorur","doi":"10.1109/CEIDP.1999.807909","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.807909","url":null,"abstract":"The results of a study aimed at evaluating the performance of several polymer compounds when exposed to low magnitude electrical discharges (corona) and high humidity levels are presented in this paper. Three different high temperature vulcanizing (HTV) silicone rubber (SiR) formulations were evaluated in a corona test cell. The magnitude and frequency of the corona discharges and the current flowing through the samples volume were recorded. The physical and chemical changes occurring on the compounds were monitored visually and by means of Fourier Transform Infrared (FTIR) spectroscopy. The results obtained from this study demonstrate that some HTV-SiR formulations used in high voltage outdoor insulation as housing materials may suffer from significant degradation even under the effect of relatively low magnitude corona discharges. On HTV-SiR compounds, such degradation process seems to be the moisture absorption characteristic of the polymer. These findings emphasize the importance of minimizing the occurrence of corona on non-ceramic insulators particularly when operating in outdoor environments.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126754452","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

Design criteria for SF/sub 6/ gas insulated power transformers up to 2500 kVA 2500kva以下SF/sub - 6/气体绝缘电力变压器设计标准

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804654

S. Trabulus

引用次数: 3