Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316)最新文献_第3页

Diagnostic markers for AC power cable insulation aging based on space charge measurements 基于空间电荷测量的交流电缆绝缘老化诊断标志

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995975

G. Montanari, Davide Fabiani, M. Melloni, F. Palmieri

引用次数: 6

Distributed PD measurement on power underground cables 电力地下电缆分布式局部放电测量

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995880

V. R. Garcia-Colon

引用次数: 6

Diagnostic testing of MV XLPE cables with low density of water trees 低水树密度中压交联聚乙烯电缆的诊断试验

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995892

S. Hvidsten, J. T. Benjaminsen

引用次数: 18

Standardized and nonstandardized ageing tests for indoor switchgear and switchgear components under severe climatic conditions 室内开关设备和开关设备部件在恶劣气候条件下的标准化和非标准化老化试验

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995944

S. Keim, D. Koenig, M. Eiselt, M. Kluge

{"title":"Standardized and nonstandardized ageing tests for indoor switchgear and switchgear components under severe climatic conditions","authors":"S. Keim, D. Koenig, M. Eiselt, M. Kluge","doi":"10.1109/ELINSL.2002.995944","DOIUrl":"https://doi.org/10.1109/ELINSL.2002.995944","url":null,"abstract":"In this paper ageing tests focussed on indoor switchgear respective on their core components are described. These tests aim at simulating severe environmental stresses and are recommended to be performed for switchgear which has to operate in a harsh indoor climate. Standardized and nonstandardized test procedures are compared on the basis of experimental experience. IEC Report 932 deals with requirements for enclosed switchgear and control gear from 1 kV to 72.5 kV, to be used in severe climatic indoor conditions and considers the environmental stress factor condensation and pollution. Different test procedures proposed in EEC Report 932 will be illustrated and relevant tests are performed on newly developed medium voltage switchgear NXAir P in the High Voltage Laboratories at Darmstadt University of Technology in cooperation with Siemens AG, Power Transmission and Distribution, Frankfurt. The objective or the presented paper is to evaluate the performance of the insulating components under harsh operating conditions by performing an ageing test.","PeriodicalId":10532,"journal":{"name":"Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316)","volume":"1 1","pages":"331-335"},"PeriodicalIF":0.0,"publicationDate":"2002-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76481441","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

Lifetime extension experience on rotating machine insulation using on-line PD testing 具有使用在线PD测试旋转机器绝缘的终身经验

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.996001

H. Zhu, V. Green, D. Huynh

{"title":"Lifetime extension experience on rotating machine insulation using on-line PD testing","authors":"H. Zhu, V. Green, D. Huynh","doi":"10.1109/ELINSL.2002.996001","DOIUrl":"https://doi.org/10.1109/ELINSL.2002.996001","url":null,"abstract":"Rotating machine failures due to insulation breakdown can cause catastrophic damages to the equipment, loss or de-rating of power output, lengthy forced outages and heavy costs to the utility. Therefore it is desirable to detect the onset of significant insulation deterioration and identify potential failures as early as possible. As in the medical field, regular testing and early detection of problems mean better chances of survival for the 'patient'. Faced with increasing pressure to increase unit availability yet reduce maintenance costs, utilities are moving away from time-based maintenance practices to condition-based maintenance efforts. Owners of generators and large motors are using on-line partial discharge analysis (PDA) systems for condition monitoring of the stator insulation system. Regular condition monitoring of the stator winding insulation can give users the confidence to safely operate machines, even ones that have suffered some degree of insulation degradation. This paper presents two case studies of how utilities applied an online PD testing system on a generator and a motor with insulation degradation to avoid substantial costs and forced outages. Long-term online PD monitoring has given the utilities confidence to continue running machines that have the potential for insulation failures.","PeriodicalId":10532,"journal":{"name":"Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316)","volume":"7 1","pages":"561-564"},"PeriodicalIF":0.0,"publicationDate":"2002-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74024496","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

An improved model for the calculation of the electrical onset in gas insulated medium inhomogeneous gaps 一种改进的气体绝缘介质非均匀间隙中起电量计算模型

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995963

C. Bak, B. Bak‐Jensen, J. T. Sørensen

{"title":"An improved model for the calculation of the electrical onset in gas insulated medium inhomogeneous gaps","authors":"C. Bak, B. Bak‐Jensen, J. T. Sørensen","doi":"10.1109/ELINSL.2002.995963","DOIUrl":"https://doi.org/10.1109/ELINSL.2002.995963","url":null,"abstract":"Most hardware for use in HV systems requires a thorough geometric design concerning the inception of breakdown (partial discharges, corona). Work shows an interest in such corona onset design optimization criteria. Corona onset optimization is based on numerical E-field calculations and different methods for determination of onset/no onset. Practical HV equipment conductor surfaces will normally form nonuniform E-fields possessing a breakdown behaviour determined by both the surface electric field and the rate of decay of the field. Besides that, among other issues, one has to take into account the type of gas, the temperature and the pressure. Therefore it seems important to apply an accurate onset criteria in corona onset design. This work presents the first step of a validated onset criteria useful for practical electrode geometries. This is accomplished for atmospheric air on the basis of the well-known Townsend approach for nonuniform fields with modifications concerning the gas parameters and validation against IEC 52 sphere-sphere gap breakdown voltages. It was found that the onset/breakdown voltage for medium nonuniform fields can be calculated by means of the same criteria for varying electrode curvatures and degrees of field utilization with an accuracy better than 4%.","PeriodicalId":10532,"journal":{"name":"Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316)","volume":"25 1","pages":"411-416"},"PeriodicalIF":0.0,"publicationDate":"2002-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74220990","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

Recent field experience in PD assessment of power cables using oscillating voltage waveforms 最近有使用振荡电压波形对电力电缆进行局部放电评估的现场经验

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995995

S. Brettschneider, E. Lemke, J. L. Hinkle, M. Schneider

引用次数: 11

A study of large current interrupting capability of SF/sub 6//N/sub 2/ mixtures SF/sub - 6//N/sub - 2/混合物大电流断流能力研究

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995973

W. Song, D.I. Yang, Y.H. Chung, D.S. Kim, H. S. Koh

引用次数: 2

Influence of the cure parameters on the partial discharge behavior of cast resins 固化参数对铸造树脂局部放电行为的影响

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995957

R. Kotte, E. Gockenbach, H. Borsi

引用次数: 11

The relationship between the estimated intensity of electrical current flowing in the electrolyte and the propagation of the local discharge on an electrolytic surface under AC voltage 在交流电压作用下，电解液中电流的估计强度与电解液表面局部放电传播之间的关系

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995922

B. Zegnini, D. Mahi

{"title":"The relationship between the estimated intensity of electrical current flowing in the electrolyte and the propagation of the local discharge on an electrolytic surface under AC voltage","authors":"B. Zegnini, D. Mahi","doi":"10.1109/ELINSL.2002.995922","DOIUrl":"https://doi.org/10.1109/ELINSL.2002.995922","url":null,"abstract":"The concept of the estimated intensity of the electrical current flowing in the electrolyte enables one to check the advancement of the leader of the discharge according to time. We observed the extension of a discharge on an electrolyte surface by using an original set-up permitting simultaneous measurements of optical and electrical parameters on the same flashover in different points of the discharge path. The resistance per unit length of the conductive film was varied in the range 2 k/spl Omega//cm to 10 k/spl Omega//cm. Experimental results suggest that on the first half of the course that the discharge nearly propagates with a constant instantaneous velocity. It then accelerates its progression on the second half with discontinuities capable to be assigned to progressions by jumps characterizing a change of mechanism of propagating discharge. Our results have been validated by comparison with those published in the literature, which they confirm and often refine. The results bring to the fore the presence, ahead of the principal discharge, of a photoionization zone in which the development can occur of the streamers serving as precursors to its extension.","PeriodicalId":10532,"journal":{"name":"Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316)","volume":"2 1","pages":"241-244"},"PeriodicalIF":0.0,"publicationDate":"2002-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88032415","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