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

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Filler concentration effects on losses in silicone based polymeric composites 填料浓度对硅基聚合物复合材料损失的影响
1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807898
E. Tuncer, S. Gubanski
{"title":"Filler concentration effects on losses in silicone based polymeric composites","authors":"E. Tuncer, S. Gubanski","doi":"10.1109/CEIDP.1999.807898","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.807898","url":null,"abstract":"Silicone polymer based rubber with different concentrations of powdered aluminum trihydrate (ATH) as filler were studied. Dielectric properties /spl chi/*(/spl omega/)=/spl chi/'-i/spl chi/'' were measured at different temperatures using low frequency dielectric spectroscopy technique. Without any ATH filler a classical interfacial relaxation was significant with dominating dc conduction in losses, /spl chi/''. By increasing the concentration of the filler a low frequency dispersion mechanism started to dominated in the relaxation behavior. With adding the filler, the dc conduction first decreased and then increased again after a certain concentration level was passed. This behavior showed that the filler particles acted like scattering centers or traps for conduction when the concentration was low. As the concentration increased the conductivity of the filler particles and of the interface (between filler particles and the polymer matrix) started to dominate the conduction. Master curve shifts of the data also showed Arrhenius type of behavior.","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":"132146831","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
Particle-initiated corona and breakdown under DC/AC mixed voltages 直流/交流混合电压下粒子引发的电晕和击穿
1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804665
M. A. Abd-Allah, S. Ward, M. M. El-Bahy
{"title":"Particle-initiated corona and breakdown under DC/AC mixed voltages","authors":"M. A. Abd-Allah, S. Ward, M. M. El-Bahy","doi":"10.1109/CEIDP.1999.804665","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.804665","url":null,"abstract":"The influence of conducting particles on the corona onset voltage and the breakdown voltage in a uniform field gap under AC voltage superimposed with negative DC biasing voltage is investigated. The effect of particle length, gap spacing and the DC biasing voltage on the corona onset and the breakdown voltages is also presented and discussed. The breakdown voltage of different gap spacing and DC biasing voltage is compared with calculated values. The comparison shows good agreement between experimental and calculated values.","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":"116445478","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
Material differentiation by water treeing tests 通过水树试验区分材料
1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807845
J. Jow
{"title":"Material differentiation by water treeing tests","authors":"J. Jow","doi":"10.1109/CEIDP.1999.807845","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.807845","url":null,"abstract":"Because of the importance of water treeing in underground medium voltage cables and the interest in preventing it, many accelerated material test methods and tree retardant materials have been developed. In this paper, several accelerated material water tree tests are reviewed. Three commercially introduced tree retardant materials were evaluated by the ASTM D6097 water treeing test under various conditions. The test parameters included aging time, temperature, water conductivity, applied voltage level, and frequency. As expected, the length of water tree increases with these factors, except temperature. Temperatures, higher than end use conditions should not be used as an acceleration factor. Not all tree retardant materials have the same water tree retardance, since each tree retardant material shows different response to the test parameters. A good tree retardant material should be very effective at various aging conditions. A higher water conductivity or longer aging time is recommended for better material differentiation in the ASTM D6097 test.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"9 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":"114896573","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
Image analysis of hydrophobicity of silicone rubber insulator 硅橡胶绝缘子疏水性的图像分析
1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807916
T. Tokoro, M. Nagao, M. Kosaki
{"title":"Image analysis of hydrophobicity of silicone rubber insulator","authors":"T. Tokoro, M. Nagao, M. Kosaki","doi":"10.1109/CEIDP.1999.807916","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.807916","url":null,"abstract":"Hydrophobicity of a silicone rubber insulator surface was studied by using image data analysis. Effect of water absorption during aging in water and its recovery in air on the hydrophobicity of silicone rubber was measured. Both of the contact angle of distilled water on the sample surface and the hydrophobic surface image of water droplets on the surface were measured. The former was measured parallel (horizontal) to the surface and the latter was measured from vertical direction to the surface. Using CCD camera we digitized the hydrophobic images of the sample surface. The droplets on the surface were made not only distilled water, which had typical surface free energy of 72.8 mN/m, but also colored water and solutions that had lower surface free energies compared to the distilled water. Using these hydrophobic images hydrophobicity class (STRI's HC level) was determined by the observer and then by the image indexes. The latter was such as size distribution and shape factor of the droplets that were measured by image data analysis.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"3 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":"116719301","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
Characteristics of PD pulse sequence and single-pulse light emission in artificially-simulated tree channel 人工模拟树状通道中PD脉冲序列和单脉冲光发射特性
1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807877
H. Kaneiwa, Y. Suzuoki, T. Mizutani
{"title":"Characteristics of PD pulse sequence and single-pulse light emission in artificially-simulated tree channel","authors":"H. Kaneiwa, Y. Suzuoki, T. Mizutani","doi":"10.1109/CEIDP.1999.807877","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.807877","url":null,"abstract":"In order to clarify the mechanisms of partial discharge (PD) and tree degradation in an electrical tree, PD's in an artificially-simulated tree channel connected to a pin-electrode in LDPE were investigated. This paper discusses the characteristics of PD's which take place when a tree propagates from the tip of artificial channel by utilizing PD pulse sequence and single-pulse light emission. The PD pulse sequence showed that large and small PD's took place in a half cycle. The magnitude of positive PD pulses changed regularly in a half cycle. Each positive PD pulse took place when the applied voltage increased by a constant value. There was no correlation between the voltage increment and the PD magnitude. The conventional simple PD model can not explain these results. The light emission from a single PD pulse was observed near the tip of pin-electrode in the artificial channel in spite of the tree propagation.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"45 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":"125092361","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
Polyurethane resins derived from castor oil for the fabrication of polymeric insulators.- II 从蓖麻油中提取的聚氨酯树脂，用于制造聚合绝缘体。——二世
1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804650
R. Altafim, C. Murakami, L.C.R. Araujo, S. C. Neto, G. Chierice
{"title":"Polyurethane resins derived from castor oil for the fabrication of polymeric insulators.- II","authors":"R. Altafim, C. Murakami, L.C.R. Araujo, S. C. Neto, G. Chierice","doi":"10.1109/CEIDP.1999.804650","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.804650","url":null,"abstract":"Polyurethane resins derived from castor oil have proved to have excellent dielectric characteristics when pure. However, for use in electrical insulation, these materials must be loaded with filler, to reduce their cost and make them more able to withstand external agents, without altering their mechanical characteristics significantly. The aim of this article is to report the performance of the resins when loaded with carbon black and mineral fillers, with reference to electrical, mechanical and thermal requirements.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"33 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":"127893592","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: 5
The effect of dielectric cylinders (line guards) on the breakdown voltage of various air gaps 介质柱(线路保护装置)对各种气隙击穿电压的影响
1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807840
S. Sebo, J. Kahler, S. Hutchins, C. Meyers, D. Oswiecinski, A. Eusebio, W. Que
{"title":"The effect of dielectric cylinders (line guards) on the breakdown voltage of various air gaps","authors":"S. Sebo, J. Kahler, S. Hutchins, C. Meyers, D. Oswiecinski, A. Eusebio, W. Que","doi":"10.1109/CEIDP.1999.807840","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.807840","url":null,"abstract":"Tests were conducted in order to contribute to the understanding and evaluation of live-line maintenance tools and safety devices. The AC breakdown voltages of various small air gaps (up to 0.2 m) formed by an energized conductor and a grounded electrode with a dielectric cylinder between them were measured. The energized electrode was a section of a power line conductor, the grounded electrode was either a standard rod or a 75 mm diameter sphere, and the insulating cylinder was resting on the conductor. The rod represented a tool held by a worker during live-line work, the sphere modelled the fist of a worker. Results of the test series show how the breakdown voltage varies with the type of electrodes, the distance between them, as well as with the relative position of the electrodes and the line guard between them.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"3 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":"128231390","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
Portable ADSS surface contamination meter 便携式ADSS表面污染计
1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804615
K. S. Edwards, P. Pedrow, R. Olsen
{"title":"Portable ADSS surface contamination meter","authors":"K. S. Edwards, P. Pedrow, R. Olsen","doi":"10.1109/CEIDP.1999.804615","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.804615","url":null,"abstract":"All dielectric self-supporting (ADSS) fiber optic cable is known to have a limited installation lifetime in some environments when installed near high voltage transmission lines. Dry band arcing has been identified as a contributing factor in the short service life for some of these cables. It has been hypothesized that contamination on the jacket of the fiber optic cable will be an indicator of cable installations that will have a short service life. In this work a portable transducer for measuring contamination levels on the jacket of ADSS cable is being designed, constructed and calibrated in a high voltage environment. The transducer will be designed to operate in both wet and dry conditions. It will measure the electrical resistance per meter of contaminated in-service ADSS fiber optic cable. The transducer will be effective in the range 10/sup 5/ to 10/sup 7/ /spl Omega//m. It will be computer controlled thus requiring little intervention by the operator. This research will include laboratory scale tests with ADSS cable and a 365 kV AC power supply.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"72 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":"128385373","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
Optimization of EP/Al/sub 2/O/sub 3/-composites for SF/sub 6/ gas insulated power apparatus SF/sub - 6/气体绝缘电力装置用EP/Al/sub - 2/O/sub - 3/-复合材料的优化
1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804643
J. Seifert, M. Di Lorenzo, A. Herden, H. C. Kamer, R. Schifani
{"title":"Optimization of EP/Al/sub 2/O/sub 3/-composites for SF/sub 6/ gas insulated power apparatus","authors":"J. Seifert, M. Di Lorenzo, A. Herden, H. C. Kamer, R. Schifani","doi":"10.1109/CEIDP.1999.804643","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.804643","url":null,"abstract":"Support insulation in high voltage gas insulated substation (GIS) or gas insulated line (GIL) equipment must fulfill special requirements concerning the insulating, mechanical and environmental properties of the applied composite materials. This paper focuses on the performance reached by applying adhesion technology to increase the microscopic adhesion or bonding strength between Al/sub 2/O/sub 3/ filler surfaces and an epoxy matrix. The filler type and the medium filler grain size are varied to find an optimum in the mechanical crack resistance parameters. Besides the well-known mechanical, dielectric and electrical testing methods, a special partial discharge (PD) resistance testing method (Cigre II method) is applied to compare the PD resistivities of the investigated composites.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"91 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":"128609023","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
Hydrophobicity recovery of polydimethylsiloxane after repeated exposure to corona discharges. Influence of crosslink density 反复暴露于电晕放电后聚二甲基硅氧烷的疏水性恢复。交联密度的影响
1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807914
H. Hillborg, U. Gedde
{"title":"Hydrophobicity recovery of polydimethylsiloxane after repeated exposure to corona discharges. Influence of crosslink density","authors":"H. Hillborg, U. Gedde","doi":"10.1109/CEIDP.1999.807914","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.807914","url":null,"abstract":"Crosslinked polydimethylsiloxane, with two different crosslink densities (M~/sub c/), have been repeatedly exposed to corona discharges. Between each exposure the specimens were allowed to rest for at least 1000 h allowing recovery of hydrophobicity. The material with the dense network (M~/sub c/: 700 g/spl middot/mol/sup -1/) was, according to XPS, more oxidized compared to the less crosslinked material (M~/sub c/: 12000 g/spl middot/mol/sup -1/). The material with the dense network gradually decreased the rate of recovery of hydrophobicity with increasing dose of corona whereas it was only moderately retarded in the less crosslinked material. Scanning electron microscopy showed the formation of surface cracks in both materials after a certain dose of corona. The material with the dense network exhibited thinner (<1 /spl mu/m), more narrow cracks, whereas the less crosslinked material exhibited wider (>5 /spl mu/m), more curved surface cracks. In the less crosslinked material, new cracks were initiated at the bottom of older cracks. Thus by further oxidation of previously unoxidized PDMS in the bottom of the cracks, new cracks were formed. It is suggested that the build-up and the fracture of the silica-like surface layer influence the transport of low molar mass siloxanes to the surface, and the rate of recovery of hydrophobicity.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"84 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":"126202462","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: 10
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