Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316)最新文献_第7页

Methods for comparing frequency response analysis measurements 频率响应分析测量值的比较方法

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995909

S. Ryder

{"title":"Methods for comparing frequency response analysis measurements","authors":"S. Ryder","doi":"10.1109/ELINSL.2002.995909","DOIUrl":"https://doi.org/10.1109/ELINSL.2002.995909","url":null,"abstract":"This paper presents and evaluates a number of methods for comparing the results of frequency response analysis (FRA) measurements on power and distribution transformers. It begins with a short description of FRA and its uses. This includes a short review of the literature. Existing methods for comparing the results of FRA measurements are presented and discussed. A case is made for the increased use of statistical indicators. Two different statistical indicators are presented: the correlation coefficient and the spectrum deviation. The mathematical definition of each is given. The two indicators are applied to case studies, based on actual applications of FRA to power and distribution transformers. The performance of the indicators in these case studies is evaluated, considering the importance of avoiding both false positive and false negative results. It is concluded that the correlation coefficient is a useful statistical indicator in most circumstances. It is further concluded that the spectrum deviation is an unsuitable indicator, as it is particularly prone to give false negative results in some circumstances. Recommendations are made concerning the evaluation of other statistical indicators which may be proposed in the future.","PeriodicalId":10532,"journal":{"name":"Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316)","volume":"13 1","pages":"187-190"},"PeriodicalIF":0.0,"publicationDate":"2002-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80282879","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: 96

Experimental investigation into the thermal-ageing of Kraft paper and mineral insulating oil 牛皮纸和矿物绝缘油热老化的实验研究

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995946

B. Pahlavanpour, M. Martins, A. de Pablo

引用次数: 36

Signal interpretation of partial discharges in three-phase medium voltage cable systems measured on-line 在线测量三相中压电缆系统局部放电的信号解释

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995994

P. van der Wielen, P. Wouters, E. Steennis

引用次数: 8

The influence of local environmental conditions on surface discharge behaviour 当地环境条件对地表排放行为的影响

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995969

Y. L. Sam, P. Lewin, A. Davies, J. S. Wilkinson, S. Sutton, S. Swingler

引用次数: 1

Contact discharge test cell: a means of generating signals for sensitivity verification of UHF PD detection in GIS 接触放电测试单元:一种用于GIS中UHF PD检测灵敏度验证的产生信号的手段

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995962

M. Judd, P. Coventry, J. Blackett

引用次数: 2

Verification of the operation reliability by suitable test procedures for GIL 通过适合GIL的测试程序验证操作可靠性

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995967

M. Finkel, W. Boeck, E. Kynast

引用次数: 2

Temperature dependent relaxation studies on oil-filled transformer 充油变压器的温度依赖性松弛研究

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995906

Hongyan Cao, S. Birlasekaran

{"title":"Temperature dependent relaxation studies on oil-filled transformer","authors":"Hongyan Cao, S. Birlasekaran","doi":"10.1109/ELINSL.2002.995906","DOIUrl":"https://doi.org/10.1109/ELINSL.2002.995906","url":null,"abstract":"Relaxation studies in oil-filled power transformers are very important to evaluate the ageing characteristics of the oil-paper insulation. The polarization processes at the interfaces can be understood by making measurements at different operating temperatures. A laboratory study is carried out using both frequency and time domain techniques. In the frequency domain technique, a dielectrometer is used and the linear response characteristics with energizing voltage magnitude up to 200 V peak are studied. In the time domain method, the recovery voltage method (RVM) up to 300 V DC is used to study the linearity in response. The obtained response is fitted to an extended Debye model and the interrelation of the model with each measuring technique is established. Then, the temperature dependence of these parameters is studied by keeping the oil-paper insulated transformer in a humidity/temperature controller for 10 hours at a certain setting. The ambient temperature is changed from 20/spl deg/C to 50/spl deg/C. The responses at high temperatures differ from the measurement at room temperature. The conductance property of the transformer insulation between two windings changes significantly. Three types of analysis are done to correlate the measurements. The first analysis is to fit the frequency and time domain responses to the extended Debye model. The determined parameters are compared to evaluate the validity. of model. In the second method of analysis with RVM, RV spectra are evaluated in term of peak magnitude variation and time shift of peak occurrence with temperature. In the third method of analysis with low frequency response, it is found that the variation of admittance and loss angle has a unique bandwidth variation with temperature. It is found that the relaxation processes of oil and oil-paper are distinctive and their dependence on temperature is different.","PeriodicalId":10532,"journal":{"name":"Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316)","volume":"91 1","pages":"174-178"},"PeriodicalIF":0.0,"publicationDate":"2002-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80412651","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: 11

Characterization of dielectric films for power capacitors by space charge technique 空间电荷法表征电力电容器介质薄膜

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995942

J. Reboul, M. Rouff, R. Carin

引用次数: 4

New approach on comprehensive diagnosis of insulation faults in power transformer 电力变压器绝缘故障综合诊断新方法

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995913

N. Gao, Zhan-hong Yan

引用次数: 6

Analysis of 3-D partial discharge patterns in XLPE power cable based on fractal theory 基于分形理论的交联聚乙烯电力电缆三维局部放电模式分析

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI: 10.1109/ELINSL.2002.995894

Junhua Luo, Haigang Zhu, Jiang Feng, Jian Yuan

引用次数: 4