1980 IEEE International Conference on Electrical Insulation最新文献_第2页

Thermal degradation in silicone liquid/aramid paper insulation system 有机硅液体/芳纶纸绝缘系统的热降解

1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470859

K. Urabe, T. Masuda, H. Yamaguchi

引用次数: 3

Corona degradation of polyethylene under multiple stress conditions 聚乙烯在多种应力条件下的电晕降解

1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470862

K. Wolter, M. Shaw, J. Johnson

引用次数: 3

Considerations on the insulation degradation characteristics by functional tests 功能试验对绝缘退化特性的思考

1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470863

H. Akahori, H. Mitsui, E. Koyanagi

引用次数: 5

The application of the pulse discrimination system to the measurement of partial discharges in insulation under noisy conditions 脉冲判别系统在噪声条件下绝缘局部放电测量中的应用

1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470901

I. Black, Nelson K. Y. Leung

{"title":"The application of the pulse discrimination system to the measurement of partial discharges in insulation under noisy conditions","authors":"I. Black, Nelson K. Y. Leung","doi":"10.1109/ICEI.1980.7470901","DOIUrl":"https://doi.org/10.1109/ICEI.1980.7470901","url":null,"abstract":"Various methods of eliminating noise from partial discharge measurements are reviewed and it is pointed out that such techniques may not always be applicable due to environmental conditions and cost. It is explained that, by using the pulse discrimination system originally developed by one of the authors, one may reduce or eliminate filtering and screening and undertake partial discharge measurements in the presence of external interference. The original system was rather slow and the paper describes a new faster version which enables partial discharges to be recorded in the presence of interference pulse rates of around 105 per second. The measurement system has a limited bandwidth and any common-mode radio interference entering the system within this bandwidth can be eliminated by the pulse discrimination system. The test results demonstrate that a single small pulse can be detected when it is buried in interference. The paper also shows that partial discharge characteristics taken under quiet conditions are similar to those recorded with considerable radio and pulse interference. When undertaking measurements under noisy conditions, some of the required pulses are lost as they are superimposed on interference. Methods of gathering data over a number of cycles of the supply voltage are therefore considered.","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"2006 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129436567","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

Surface flashover characteristics of Mylar in compressed SF6 压缩SF6中聚酯薄膜的表面闪络特性

1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470870

S. Dale

引用次数: 1

Reliability study of high voltage stator windings for large rotating machinery 大型旋转机械高压定子绕组可靠性研究

1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470874

K. Matsunobu, F. Aki

引用次数: 0

A computer controlled partial discharge measurement system for capacitor evaluation 计算机控制的电容器局部放电测量系统

1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470907

L. P. Hart, W. R. Donahue

{"title":"A computer controlled partial discharge measurement system for capacitor evaluation","authors":"L. P. Hart, W. R. Donahue","doi":"10.1109/ICEI.1980.7470907","DOIUrl":"https://doi.org/10.1109/ICEI.1980.7470907","url":null,"abstract":"Continuous measurement of partial discharges gives information not available by conventional corona measurements. Partial discharge activity may be related to dynamic variables, such as time under voltage, overvoltages, and changes in temperature and/ or pressure. A computer controlled system which monitors such variables, in addition to partial discharge characteristics, is described. To improve the productivity of the system, several samples are energized simultaneously while the data acquisition is multiplexed. The temperature of the test samples may be controlled with ovens. A data logger measures test voltage and temperature of the units. Partial discharge activity is monitored both by a pulse height analyzer and the data logger. A mini-computer is used for control and data analysis. Results may be utilized immediately, as for adjustment of parameters, or subsequently used for correlation of partial discharge activity with other parameters in longer term tests. Results illustrating the use of the system are presented. Effects of temperature cycling on the partial discharge activity in several types of liquid impregnated capacitors, with differing dielectric pads (paper, film) and electrodes (foil, metallized), are shown. The applications and limitations of the system for capacitor evaluation are discussed.","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124218617","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

Electron beam induced conductivity in polyethylene of different crystallinity and the effect of SF6 电子束诱导不同结晶度聚乙烯的电导率及SF6的影响

1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470909

H. Uth, W. Schmidt, J. Rabe

引用次数: 0

Carrier traps in polymeric insulating materials 聚合物绝缘材料中的载流子陷阱

1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470899

M. Ieda, Y. Suzuoki, T. Mizutani

{"title":"Carrier traps in polymeric insulating materials","authors":"M. Ieda, Y. Suzuoki, T. Mizutani","doi":"10.1109/ICEI.1980.7470899","DOIUrl":"https://doi.org/10.1109/ICEI.1980.7470899","url":null,"abstract":"Recently, space charge in insulating materials has been pointed out to play an important role in the dielectric breakdown, especially in the DC insulation system. The nature of space charge is closely related to the carrier trapping phenomena. In this paper, natures of carrier traps in various polymers were investigated by using x-ray induced thermally stimulated current (TSC) and thermoluminescence (TL) techniques. The TSC and TL techniques are powerful especially in high and low temperature regions, respectively. Most polymers except those of high ionic conduction such as polyvinyl chloride show remarkable TSC and TL peaks due to trapped carriers, suggesting an abundance of carrier traps. Most of these peaks correspond to the onset of molecular motions in polymers, suggesting that the carrier detrapping is closely related to molecular motions. There exist many traps in crystallites and/or in their interfacial regions. In polyethylene (PE), there are five or six kinds of carrier traps, which are considered to be due to physical defects such as cavities. Both oxidation and γ-irradiation introduce new deep traps into PE and they greatly influence the electrical conduction in PE.","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122222340","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

New designs for H.V. insulators with reference to desert conditions 参考沙漠条件的高压绝缘子的新设计

1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470882

M. S. Abou-Seaaa, A. Zaghloul, S. Salem

引用次数: 0