2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132)最新文献_第10页

Polarity effect on electrical current conduction and electrohydrodynamically induced fluid flow in a AW type EHD pump 极性对AW型EHD泵内电流传导和电流体动力诱导流体流动的影响

2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132) Pub Date : 2000-10-15 DOI: 10.1109/CEIDP.2000.885227

R. Ohyama, A. Watson, J. Chang

引用次数: 1

Live line working distances in reduced air densities 降低空气密度时的带电线路工作距离

2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132) Pub Date : 2000-10-15 DOI: 10.1109/CEIDP.2000.885267

A. Villalobos, P.A. Calva

引用次数: 1

Degradation of Teflon/sup TM/ by electrical discharge in high-humidity air 在高湿空气中放电降解聚四氟乙烯/sup TM/

2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132) Pub Date : 2000-10-15 DOI: 10.1109/CEIDP.2000.885219

J. Velikonja, J. A. Robinson, M. Bergougnou, G. Castle, W. Cairns, I. Inculet

{"title":"Degradation of Teflon/sup TM/ by electrical discharge in high-humidity air","authors":"J. Velikonja, J. A. Robinson, M. Bergougnou, G. Castle, W. Cairns, I. Inculet","doi":"10.1109/CEIDP.2000.885219","DOIUrl":"https://doi.org/10.1109/CEIDP.2000.885219","url":null,"abstract":"A long-term durability test of high-voltage AC electrodes for ozone generation in a novel type of advanced oxidation reactor has been conducted. In this reactor, ozone is produced by dielectric-barrier discharge through humid gas in a parallel-plate geometry, with water as the ground electrode. Teflon membranes were chosen as dielectric barriers for reasons of the highly aggressive nature of the plasma. The flat, metallic parts of the electrodes, parallel with the water surface, were embedded in a second dielectric, contiguous with the Teflon membranes. The test was carried out continuously for 20 weeks, with room-temperature air as the atmosphere, over stagnant deionized water, at 24 kV and 30 kV (rms), 60 Hz. A set of 32 small electrodes was used for each voltage. The lower of the two voltages was at the threshold of corona discharge (and ozone generation). Three different membrane thicknesses (0.01 in, 0.02 in, 0.03 in) were tested. The second dielectric was silicone transformer oil. Six 0.02-in and six 0.03-in membranes at 30 kV failed due to dielectric breakdown, as well as one 0.01-in membrane at 24 kV. A failure was always accompanied by a perforation of the membrane and a shutdown of the power supply. The frequency of the occurrence of failures increased with time. Scanning electron microscopy was done on some of the membrane perforations. In addition to the failures, a progressive deterioration of the membrane surfaces was observed. In a number of membranes this resulted in open cracks through which the silicone oil slowly leaked and polymerized on the outer membrane surfaces. Particularly susceptible were 0.01-in membranes, some of which had to be exchanged before the completion of the test. Interestingly, no actual dielectric breakdown occurred in these cases.","PeriodicalId":414762,"journal":{"name":"2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122174861","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

Dielectric properties of PTFE-based composite insulating materials: interfaces effects 聚四氟乙烯基复合绝缘材料介电性能:界面效应

2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132) Pub Date : 2000-10-15 DOI: 10.1109/CEIDP.2000.884072

J. Bessede, S. Elkoun, C. Stochmil, S. Etienne

{"title":"Dielectric properties of PTFE-based composite insulating materials: interfaces effects","authors":"J. Bessede, S. Elkoun, C. Stochmil, S. Etienne","doi":"10.1109/CEIDP.2000.884072","DOIUrl":"https://doi.org/10.1109/CEIDP.2000.884072","url":null,"abstract":"This paper relates to the study of the dielectric behavior of polymer-based insulating materials used in high voltage equipment. The materials tested are microheterogeneous, basically made out of a semicrystalline polymeric matrix (polytetrafluoroethylene) with mineral particles (calcium fluoride) dispersed in it. The dielectric properties are determined in a wide frequency (or time) range by a combination of two techniques: the short time response is assessed by measuring the complex permittivity in the frequency domain (20 Hz-1 MHz), and the long term response is studied by measuring the polarization current in the time domain (1s-600s) thus covering more than 8 decades in frequency or time. The modelling used to describe microheterogeneous dielectrics is shown to fit the experimental data. However, exposure to moisture is shown to induce strong relaxational effects. These effects vanish in a reversible way by drying treatment (i.e. removal of water molecules). These additional relaxations are discussed in term of conductivity effects occurring at the interface matrix-filler particles.","PeriodicalId":414762,"journal":{"name":"2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117174062","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

Electrically coupled hydrodynamic flows 电耦合流体动力流动

2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132) Pub Date : 2000-10-15 DOI: 10.1109/CEIDP.2000.885229

K.L. Stricklett

引用次数: 1

Comparison of the sensitivity of an acoustical and electrical PD-measurement on transformers in the laboratory and on site 在实验室和现场对变压器进行声学和电气pd测量的灵敏度比较

2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132) Pub Date : 2000-10-15 DOI: 10.1109/CEIDP.2000.884052

E. Grossmann, K. Feser

引用次数: 1

Surface flashover of alumina insulators in vacuum under impulse voltage (the influence of additives) 冲击电压下真空氧化铝绝缘子表面闪络(添加剂的影响)

2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132) Pub Date : 2000-10-15 DOI: 10.1109/CEIDP.2000.884082

L. Ding, C.R. Li, Wei Wang, Jingchun Wang

引用次数: 2

Assessment of changes produced by thermal and electrical ageing of model LDPE cables using diagnostic dielectric tests 使用诊断介质试验评估LDPE模型电缆的热老化和电老化所产生的变化

2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132) Pub Date : 2000-10-15 DOI: 10.1109/CEIDP.2000.884036

J. Mackersie, M. Given, M. Judd, S. Macgregor, R. Fouracre

引用次数: 0

Electrical conductivity of kerosene by DC measurement 直流测量煤油电导率

2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132) Pub Date : 2000-10-15 DOI: 10.1109/CEIDP.2000.885276

Y. Matsubara

引用次数: 2

On line measurement of partial discharges 局部放电的在线测量

2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132) Pub Date : 2000-10-15 DOI: 10.1109/CEIDP.2000.884049

N. Srinivas, N. Ahmed, G. Raju

引用次数: 4