Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316)最新文献_第10页

The use of time intervals between consecutive discharges to characterize PD-sources 使用连续放电之间的时间间隔来表征pd源

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995989

F. Berton, R. Patsch

{"title":"The use of time intervals between consecutive discharges to characterize PD-sources","authors":"F. Berton, R. Patsch","doi":"10.1109/ELINSL.2002.995989","DOIUrl":"https://doi.org/10.1109/ELINSL.2002.995989","url":null,"abstract":"Pulse sequence analysis is a powerful tool to characterize defects that generate partial discharges. Usually, frequency distributions or scatter plots of sequence correlated parameters such as e.g. the external voltage differences /spl Delta/U between consecutive discharge events are used for diagnosis. In some cases, the analysis of the times of occurrence and especially the sequence of time-intervals /spl Delta/t between consecutive discharge pulses may even be more efficient to characterize a defect or to differentiate between different defects. In the case of only a few discharge events per cycle of the applied voltage, the parameter /spl Delta/U is very efficient and allows to distinguish clearly whether the partial discharge signals are generated by only one or more local defects, information that is very helpful for a reliable diagnosis. Even with only one type of defect, a small change in the height of the measuring voltage may significantly influence the discharge phenomenon, resp. the measured date set. The analysis of the frequency distributions of the time differences /spl Delta/t of consecutive discharge events and the elimination of 'multiple discharge pulses' together with the use of the parameter /spl Delta/U//spl Delta/t reveal very useful additional information.","PeriodicalId":10532,"journal":{"name":"Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316)","volume":"63 1","pages":"527-530"},"PeriodicalIF":0.0,"publicationDate":"2002-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83072476","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

Power transformer monitoring using UHF sensors: site trials 使用超高频传感器监测电力变压器:现场试验

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995899

M. Judd, G. P. Cleary, C. J. Bennoch, J. Pearson, T. Breckenridge

引用次数: 25

Case studies on the effect of humidity on stator winding partial discharge activity 湿度对定子绕组局部放电活动影响的实例研究

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.996005

G. Stone, V. Warren, M. Fenger

引用次数: 3

Application of acoustic emission techniques and artificial neural networks to partial discharge classification 声发射技术和人工神经网络在局部放电分类中的应用

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995895

Y. Tian, Paul Lewin, A. E. Davies, S. Sutton, S. Swingler

引用次数: 19

Electrical stress enhancement of contaminants in XLPE insulation as quality control criteria 交联聚乙烯绝缘中污染物的电应力增强作为质量控制标准

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995888

J. Bostrom, E. Marsden, R. N. Hampton, U. Nilsson, H. Lennartsson

引用次数: 5

Aspect of on-line and off-line PD diagnosis of distribution power cables 配电电缆在线离线PD诊断方面的研究

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995996

F. Wester, E. Gulski, J. Smit, E. Groot

引用次数: 4

The estimation of insulation condition of generators by on-line monitoring of partial discharges using a new detector 利用一种新型的局部放电检测仪在线监测发电机的绝缘状态

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995876

Wei Wang, Wufeng Li, C.R. Li, L. Ding, Q. Su, C. Chang

引用次数: 2

Water treeing and condition assessment of high voltage XLPE cables 高压交联聚乙烯电缆的水树及状态评定

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995893

S. Hvidsten, H. Faremo, R. Eriksson, Wei Min

引用次数: 3

Insulation diagnostics on power transformers using the polarisation and depolarisation current (PDC) analysis 基于极化和去极化电流(PDC)分析的电力变压器绝缘诊断

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995905

T. Leibfried, A. Kachler

{"title":"Insulation diagnostics on power transformers using the polarisation and depolarisation current (PDC) analysis","authors":"T. Leibfried, A. Kachler","doi":"10.1109/ELINSL.2002.995905","DOIUrl":"https://doi.org/10.1109/ELINSL.2002.995905","url":null,"abstract":"A lot of power transformers currently in operation have reached a critical age with an operating time of 30 years and more. Utilities have to make a decision either continuing to use these transformers or replacing them. As a basis for this decision, information about the condition of the currently operating power transformers is required. Ageing processes are caused by dielectric, chemical, thermal and electrodynamic stresses. They are of very complex nature. As an example, water in the solid insulation material acts as a catalyst and enforces the ageing processes. Due to variable load there is a complex temperature dependent moisture dynamic behaviour of the oil paper insulation system. Well-known methods like Karl-Fischer-Titration and dew point measurement cannot be applied on transformers in operation since it is risky and difficult to open the transformer for getting a material sample. New methods of dielectric spectroscopy have been developed to overcome this implication. The PDC-analysis (polarisation and depolarisation current analysis) is a nondestructive method for determining the moisture content in the solid insulation material of a power transformer. On the basis of this reliable analysis one can decide about further actions like an on-site drying of the active part. This paper presents the PDC technique and results of measurements on new and aged transformers.","PeriodicalId":10532,"journal":{"name":"Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316)","volume":"428 1","pages":"170-173"},"PeriodicalIF":0.0,"publicationDate":"2002-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86687294","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: 86

A novel approach (scoring system) for integrating dissolved gas analysis results into a life management system 一种将溶解气体分析结果整合到生命管理系统中的新方法(评分系统)

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995898

J. Lapworth

引用次数: 22