Conference Record of the 2004 IEEE International Symposium on Electrical Insulation最新文献_第5页

Transmission power cables PD detection at damped AC voltages 交流阻尼电压下传输电缆PD检测

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380645

E. Gulski, S. Meijer, J. Smit, F. Wester, P. Seitz

引用次数: 10

Further experience in the use of existing RTDs in windings of motors generators for the measurement of partial discharges 在电机发电机绕组中使用现有rtd测量局部放电的进一步经验

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380632

C. Kane, A. Golubev, I. Blokhintsev

引用次数: 2

Electrical property of polymer insulator with end-fitting design 端部设计聚合物绝缘子的电性能

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380562

Han-Goo Cho, U. Lee, S. Kang, K. Lim, I. Choi

引用次数: 1

Belief network classifier for evaluation of DGA data of transformers 变压器DGA数据评价的信念网络分类器

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380458

Ji Yang, Yongkang Xing, Jian Li, Youyuan Wang, Lijun Yang

引用次数: 2

New developments in solid dielectric life extension technology 固体介质寿命延长技术的新进展

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380678

G. Bertini

{"title":"New developments in solid dielectric life extension technology","authors":"G. Bertini","doi":"10.1109/ELINSL.2004.1380678","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380678","url":null,"abstract":"Twenty years have elapsed since the field introduction of the first solid dielectric enhancement technology. During those twenty years, this technology has proven itself as an important tool to enhance the reliability of aging infrastructure. Incremental improvements during those twenty years have aided in the widespread commercial acceptance of the technology on at least four continents. There are some concerns with the current technology, which has been utilized by over 150 utilities worldwide. These include: (1) A higher than desirable post-injection failure profile, due to the slow permeation of the fluid into the dielectric and the resulting slow increase in dielectric performance after injection of approximately 0.5% per day, (2) a limited cable life extension of 10-20 years as suggested by, (3) safety and operational issues related to the low flash point (-5.5 /spl deg/C), and (4) the corrosion of aluminum conductors that occasionally results in failure of treated cables caused by high concentrations of methanol by-product of the most widely-used treatment fluids. A novel approach, which includes new installation methods and new materials to extend the life of power cables, is described. Theory and experiments are discussed which demonstrate that the new approach addresses all of the current shortcomings associated with the first generation technology. In comparison to the technology employed over the last two decades, the new technology provides: (1) More rapid short-term reliability the post-injection dielectric performance improvement slope is greater than an order of magnitude steeper, (2) longer rejuvenated cable life approaching the 40 year expected life for the highest performance modern cable designs, (3) an inherently safer installation, including lower flammability fluids, which have flash points in excess of 65 /spl deg/C, and an injection paradigm, which dramatically reduces the likelihood of electrical contact, and (4) compatibility with all aluminum alloy and copper alloy conductors.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121521825","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: 20

Breakdown tests of glass fibre reinforced polymers (GFRP) as part of improved lightning protection of wind turbine blades 玻璃纤维增强聚合物(GFRP)作为改进风力涡轮机叶片防雷的一部分的击穿试验

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380657

S. F. Madsen, Flemming Mraller, Larsen Lars, Bo Hansen, Kim Bertelsen, J. Holboell, M. Henriksen, Ssp Technologies, Denmark Denmark, DK-2800 Lyngby

引用次数: 23

Study on the effect of impulse voltage withstandability on the thermally-aged transformer paper 热老化变压器纸耐冲击电压影响的研究

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380436

T. Murthy, U. Yugandhar, S.C. Gupta, A. Bhoomaiah, J. S. Kuntia

引用次数: 4

Using multivariate statistical method to recognize different aging stages of oil-paper 采用多元统计方法识别油纸的不同老化阶段

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380460

R. Liao, Lijun Yang, Jian Li, Bing Xie

{"title":"Using multivariate statistical method to recognize different aging stages of oil-paper","authors":"R. Liao, Lijun Yang, Jian Li, Bing Xie","doi":"10.1109/ELINSL.2004.1380460","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380460","url":null,"abstract":"The multivariate statistical method is introduced in this paper to diagnose insulation performance and identify its aging stages. Based on the lifetime model obtained by lifetime tests, a reasonable experimental condition is chosen to age several oil-paper samples for about 240 hours. Determination of partial discharge signal is carried out in the constant interval throughout the whole aging period. There are a total of 31 parameters extracted and 11 were found to be closely correlated to the aging stages and are used as aging characteristic parameters in the following analysis. In order to identify the proper aging conditions, the cluster method is used to analyze 30 vectors extracted from 6 samples at 5 different aging stages. It is shown that different samples have the similar performance at the same aging stage. The 30 vectors are used to obtain discriminant functions. The characteristic vector with eleven-dimensions is mapped to two-dimensions and the other 30 vectors are analyzed using discriminant functions. It is concluded that a reasonable result can be achieved using the discriminant functions.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130738947","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: 9

Influence of variable plate separation on fringing electric fields in parallel-plate capacitors 变板间距对并联板电容器边缘电场的影响

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380606

M. Hegg, A. Mamishev

{"title":"Influence of variable plate separation on fringing electric fields in parallel-plate capacitors","authors":"M. Hegg, A. Mamishev","doi":"10.1109/ELINSL.2004.1380606","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380606","url":null,"abstract":"Measurement of bulk physical properties in dielectric materials is typically performed using a parallel-plate capacitor configuration, where a dielectric material is placed between two conducting plates and the complex permittivity is found by measuring capacitance and conductance between the electrodes. Fringing electric fields exist between any two parallel conducting plates of finite length and the additional capacitance these fields add is not easily accounted for. It is important to account for edge effects in many capacitive sensing applications in order to ensure accurate results. Unfortunately, these edge effects are not easily quantifiable and are subject to change with varying sensor geometries. A quantitative relationship between fringing field strength and sensor geometry will improve the accuracy of many capacitive sensing applications. This work presents finite element simulations showing the influence of variable plate separation on fringing field effects in a system designed to measure the dielectric properties of a fluid. A quantitative relationship is established that relates the sensor response to the plate distance and fluid position. This relationship can be applied to experimental data in order to compensate for any edge effects present in the system.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134549836","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: 38

A procedure for diagnosis and condition based maintenance for power transformers 电力变压器诊断与状态维修程序

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380666

A. Setayeshmehr, A. Akbari, H. Borsi, E. Gockenbach

{"title":"A procedure for diagnosis and condition based maintenance for power transformers","authors":"A. Setayeshmehr, A. Akbari, H. Borsi, E. Gockenbach","doi":"10.1109/ELINSL.2004.1380666","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380666","url":null,"abstract":"Power transformers are important and expensive components in electric energy networks. Because of the economic motivation, preventive tests and diagnosis are of benefit to predict fault conditions, optimize maintenance and increase reliability of power transformers. There is a large amount of academic and industry researches into transformer diagnosis and maintenance. Advanced diagnostic techniques and recently introduced online monitoring approaches for power transformers, provide the means to enhance the classical maintenance program. Therefore it is necessary to change from time based maintenance program to a condition based diagnosis procedure. In this contribution we introduce diagnosis and condition based maintenance programs for power transformers. This program, according to the current situation and periodical inspections of transformer, will suggest a procedure for performing diagnosis and maintenance. The condition based diagnosis process uses some of the current diagnosis methods (e.g. oil test, DGA, PD, etc.) to determine the condition of the transformer. In this process, we don't use all of the diagnostic methods in the first step, but, rather we suggest some methods step by step based on the transformer condition.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132250579","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: 40