1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)最新文献_第7页

Criteria for the diagnostic of polluted ceramic insulators based on the leakage current monitoring technique 基于泄漏电流监测技术的陶瓷绝缘子污染诊断准则

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807905

Isaias RAMIREZ-VAZQUEZ, J. L. Fierro-Chavez

{"title":"Criteria for the diagnostic of polluted ceramic insulators based on the leakage current monitoring technique","authors":"Isaias RAMIREZ-VAZQUEZ, J. L. Fierro-Chavez","doi":"10.1109/CEIDP.1999.807905","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.807905","url":null,"abstract":"Ceramic insulators installed in a 400 kV line located in a semidesertic area in Monterrey, Mexico have registered flashover caused during critical pollution (high amount of low solubility material) and wetting conditions (dense fog). In previous studies, the contaminant deposited on these insulators was chemically and electrically reproduced in the laboratory and the wetting conditions needed to cause the flashover at nominal voltage were also determined. To get more information, five different profiles of glass and porcelain insulators and several on-line leakage current monitors were installed in this line to determine the pollution accumulation process. Pollution tests were carried out in laboratory using the same insulator profiles in order to determine the leakage current patterns during critical conditions. The obtained values are being used to compare the performance of the insulators installed in the field with the purpose of providing preventive maintenance indicators. The maximum leakage current levels have been defined for the different profiles and a tighten relation between ESDD and leakage current has been obtained. The current levels have been used as a sign of alarm for the maintenance of this line during several years.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"49 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":"127790783","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: 35

Pulse-sequence-analysis-chances to characterize defects 脉冲序列分析-表征缺陷的机会

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804636

R. Patsch, F. Berton

引用次数: 12

Role of excited species in dielectric barrier discharge mechanisms observed in helium at atmospheric pressure 大气压下氦介质阻挡放电机制中激发态的作用

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807844

G. Gouda, F. Massines

{"title":"Role of excited species in dielectric barrier discharge mechanisms observed in helium at atmospheric pressure","authors":"G. Gouda, F. Massines","doi":"10.1109/CEIDP.1999.807844","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.807844","url":null,"abstract":"There exists, at atmospheric pressure, three different dielectric barrier discharges (DBD) resulting from three different breakdown mechanisms: (i) glow DBD (GD), which results from Townsend breakdown (ii) filamentary discharge (FD) due to streamer breakdown and (iii) homogeneous discharge (HD) formed by streamer overlapping. The transition between these breakdown mechanisms in helium has been studied. The analysis is based on electrical characteristics, short exposure time photographs and emission spectroscopy of the discharge. The last technique, used during and after the discharge, permits to separate the role of electrons from that of long life time excited species thanks to the discharge's pulsating nature. The study has pointed out the importance of seed electrons present in the gas at the moment of breakdown. Their density depends on the electric field distribution in the gap and the density of metastables. The field can maintain electrons in the gap from one breakdown to the following one, and the metastables, by Penning ionisation, create electrons between two breakdowns.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"290 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":"125887694","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

Influence of bulk dielectric polarization and void geometry upon PD transients 体介质极化和空隙几何对局部放电瞬态的影响

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804625

I. W. McAllister, Crichton-Fratrådt

引用次数: 1

Velocity and power fields electrohydrodynamic flows 速度场和功率场

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807931

Y.K. Stishkov, A. Ostapenko, M.A. Pavleyno

引用次数: 7

Ozone production using cylindrical reactors with and without solid dielectric layers in dry air 在干燥空气中使用有或没有固体介电层的圆柱形反应器生产臭氧

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804667

W.J.M. Samaranayake, T. Miyahara, T. Namihira, S. Katsuki, R. Hackam, H. Akiyama

{"title":"Ozone production using cylindrical reactors with and without solid dielectric layers in dry air","authors":"W.J.M. Samaranayake, T. Miyahara, T. Namihira, S. Katsuki, R. Hackam, H. Akiyama","doi":"10.1109/CEIDP.1999.804667","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.804667","url":null,"abstract":"An investigation into ozone production in dry air-fed ozonizers under different operating gas discharge conditions at a pressure of 1.01/spl times/10/sup 5/ Pa using a spiral wire made to a cylindrical configuration is reported. A magnetic pulse compressor provided voltage and current pulses with a repetition rate of up to 500 pulses per second (pps). A cylindrical configuration with ceramic and polyvinyl chloride (PVC) on the outer electrode and without solid dielectric were used. High production yields were obtained of ozone of about 122, 60 and 57 g/kWh by the ceramic, PVC and without dielectric layers, respectively for 15.7-cm length reactor. The length of the cylindrical reactors was varied from 15.7 cm to 1 m. The flow rate of the gas was varied from 1.5 to 3.0 1/min. The dependence of the concentration and the production yield of ozone on different pulse voltages (17 to 63 kV) and varying pulse repetition rate (25 to 400 pps) with and without solid dielectric layer is reported. This investigation has industrial applications for construction of advanced ozone generators.","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":"125214620","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

Spatial and spectral resolution of electroluminescence in XLPE XLPE中电致发光的空间和光谱分辨率

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804582

S. Bamji, A. Bulinski

引用次数: 4

Estimation of carrier mobility using space charge measurement technique 利用空间电荷测量技术估计载流子迁移率

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804660

Naohiro Hozumi, Yuji Muramoto, M. Nagao

引用次数: 7

Comparing linear regression and maximum likelihood methods to estimate Weibull distributions on limited data sets: systematic and random errors 比较线性回归和最大似然方法在有限数据集上估计威布尔分布:系统和随机误差

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804618

R. Ross

引用次数: 19

Correlation between temperature gradient and space charge in an oil impregnated pressboard submitted to an electric field 在电场作用下浸渍油压板的温度梯度与空间电荷的关系

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807923

P. Mas, G. Touchard, O. Moreau

引用次数: 2