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Conference Record of the 2004 IEEE International Symposium on Electrical Insulation最新文献

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A method for modeling power transformer tap winding for transient studies 一种电力变压器分接绕组暂态建模方法
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380434
M. Naderi, M. Vakilian
{"title":"A method for modeling power transformer tap winding for transient studies","authors":"M. Naderi, M. Vakilian","doi":"10.1109/ELINSL.2004.1380434","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380434","url":null,"abstract":"One of the challenges a transformer designer is faced with is to correctly model the different types of transformer windings for transient study. For a precise insulation design, determination of transformer transient responses is unavoidable. The basis of these studies is calculation of transient responses due to application of standard switching and lightning impulse waves to the transformer winding. In a previous work, a computer program was developed for determination of the layer and disk type windings transient model parameters based on design data. This program has all of the necessary capabilities for a detailed transient study. As a continuation of that work, A method will be introduced for modeling the transformer tap winding. The tap winding is a part of HV or LV winding in a transformer which can be used for adjusting the output voltage after any small change in the output voltage. This model will be employed for modeling a 40 MVA and 230/63 kV transformer with tap winding, and the voltage distribution along its tap winding will be employed for evaluation of the model.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"56 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":"132415312","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
Partial discharge characteristics at low pressures in dry air and argon 低压干燥空气和氩气中的局部放电特性
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380684
D. Kasten, X. Liu, S. Sebo, D. Grosjean, D. Schweickart
{"title":"Partial discharge characteristics at low pressures in dry air and argon","authors":"D. Kasten, X. Liu, S. Sebo, D. Grosjean, D. Schweickart","doi":"10.1109/ELINSL.2004.1380684","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380684","url":null,"abstract":"Characteristics of partial discharges (PD) in two gases (air and argon) under pressures in the range of 0.1 to 760 Torr, and 60 Hz AC energization are discussed for an energized needle grounded plane electrode arrangement. The most significant conclusion of the study is that the frequency content of PD current pulses for all the tests conducted is much lower at low pressures than at atmospheric pressure. In general, the frequency content of PD current pulses at low pressures is outside the detection range of typical commercially available PD equipment.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"24 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":"133174529","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
On-line insulation diagnostics for current transformers 电流互感器绝缘在线诊断
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380670
R. Evert, D. Hoch
{"title":"On-line insulation diagnostics for current transformers","authors":"R. Evert, D. Hoch","doi":"10.1109/ELINSL.2004.1380670","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380670","url":null,"abstract":"High voltage current transformers (CTs) perform a secondary function in a power utility. In the Transmission group in Eskom, more than 30% of over 10000 CTs have been in service for more than 30 years. A real need exists for a method by which on-line partial discharge (pd) measurements can be recorded which translate into a qualitative interpretation of the degree to which both bulk insulation deterioration and voids have progressed with operational conditions. This paper will present the concepts of high frequency elements in the insulation leakage current which uniquely describe different types of failure modes in high voltage insulation. The paper will present results of forcibly created voids and insulation deterioration and the corresponding signatures for these conditions.","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":"115032140","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: 1
Simulation of the formation and propagation of streamers in SF/sub 6/and its gas mixtures in uniform and nonuniform fields 均匀和非均匀场中SF/sub 6中拖缆的形成和传播及其气体混合物的模拟
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380555
W. Pfeiffer, Feng Wang, N. Kouzichine
{"title":"Simulation of the formation and propagation of streamers in SF/sub 6/and its gas mixtures in uniform and nonuniform fields","authors":"W. Pfeiffer, Feng Wang, N. Kouzichine","doi":"10.1109/ELINSL.2004.1380555","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380555","url":null,"abstract":"The formation and propagation of streamers in SF/sub 6/ and its gas mixtures were simulated using the hybrid Monte-Carlo-collision / fluid model in uniform and nonuniform fields. The simulation in uniform field is based on accurate numerical solution of Poisson's equation in conjunction with the continuity equations for electrons, negative and positive ions. Some simplifications for the nonuniform field's calculation were applied due to the limit of a computer's calculation speed. The effect of O/sub 2/ upon the SF/sub 6//N/sub 2//O/sub 2/ gas mixture's critical field is also discussed. The electron density, positive and negative ion densities, electric field in the discharge channel, which are very important to understand the phenomena of streamer development and to assess the insulation strength of the gas mixture, are also presented in This work.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"100 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":"132146322","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: 1
Multilayer composite insulation material with high resources of electrical strength 多层复合绝缘材料具有较高的电强度资源
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380702
V. Pak, A. Drachev, A.B. Oilman, A. Kuznetsov
{"title":"Multilayer composite insulation material with high resources of electrical strength","authors":"V. Pak, A. Drachev, A.B. Oilman, A. Kuznetsov","doi":"10.1109/ELINSL.2004.1380702","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380702","url":null,"abstract":"The comparative analysis of data was made on electric breakdown of the composite insulator with the PET film and the samples without one. It is shown, that the PET film insertion gives an essential increase of breakdown strength of composite insulation.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"12 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":"134548246","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
Optimization of corona ring design for long-rod insulators using FEM based computational analysis 基于有限元计算分析的长杆绝缘子电晕环设计优化
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380655
W. Sima, F. Espino-cortes, E. Cherney, S. Jayaram
{"title":"Optimization of corona ring design for long-rod insulators using FEM based computational analysis","authors":"W. Sima, F. Espino-cortes, E. Cherney, S. Jayaram","doi":"10.1109/ELINSL.2004.1380655","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380655","url":null,"abstract":"The paper presents a method to optimize the location and the dimensions of the corona ring for transmission line composite insulators using finite element based software, FEMLAB. The procedure used to optimize the corona ring design, which handles more than one parameter, has been verified with examples that have an analytical solution or known optimal values. In this work the optimization is based on finding the maximum field along the insulator surface, such that this maximum field is well below the corona inception level. The design parameters of the ring diameter, diameter of the ring tube, position of the ring in its vertical plane, and the maximum field that cannot exceed the corona inception level have been used in the optimization process.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"26 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":"125949818","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: 45
Design and building of data warehouse for steam turbine-generator set 汽轮发电机组数据仓库的设计与建立
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380422
Jian Ou, Cai Sun, Bide Zhang
{"title":"Design and building of data warehouse for steam turbine-generator set","authors":"Jian Ou, Cai Sun, Bide Zhang","doi":"10.1109/ELINSL.2004.1380422","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380422","url":null,"abstract":"Turbine generator set is the key equipment in a power system. Keeping the turbine generator set working under safe and reliable condition as long as possible is a subject which draws much attention in engineering field and research field. Online monitoring is a means commonly used. Due to the long running time of an online monitoring system, a large amount of complete equipment information is gained that is very useful to condition-based maintenance and data mining of faults. Data warehouse technology, which is the core of turbine generator set diagnosis information memory and reading, is introduced in this paper. The method of design and building of a data warehouse applied to online monitoring and diagnosis is presented Also.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"55 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":"123422025","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
Design of multichannel fringing electric field sensors for imaging. Part II. Numerical examples 成像用多通道边缘电场传感器的设计。第二部分。数值例子
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380619
X. B. Li, C. Kato, A. Zyuzin, Alexander V. Mamishev
{"title":"Design of multichannel fringing electric field sensors for imaging. Part II. Numerical examples","authors":"X. B. Li, C. Kato, A. Zyuzin, Alexander V. Mamishev","doi":"10.1109/ELINSL.2004.1380619","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380619","url":null,"abstract":"Two concentric-ring fringing electric field (FEF) sensors are designed for dielectrometry measurement of round samples, as a specific example to further illustrate the design principles for FEF sensors introduced in part I of the paper. Finite element simulations are carried out to analyze and compare such sensor performance characteristics as signal strength and penetration depth. The effects of changes in sensor substrate thickness and shielding electrode width are also evaluated. Simulation results show a clear dependence between these design parameters and sensor performance.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"25 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":"121708321","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: 6
Wavelet-based denoising for PD online measurement of transformers 基于小波去噪的变压器局部放电在线测量方法
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380446
Jian Li, Youyuan Wang, L. Du, Zhuorui Jin, Yang Yang
{"title":"Wavelet-based denoising for PD online measurement of transformers","authors":"Jian Li, Youyuan Wang, L. Du, Zhuorui Jin, Yang Yang","doi":"10.1109/ELINSL.2004.1380446","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380446","url":null,"abstract":"The method based on thresholding and shrinking empirical wavelet coefficients is introduced in this paper for denoising PD signals. Because the wavelet-based denoising can not give a satisfied results while PD pulse amplitude is the same as or less than that of discrete spectral interferences (DSI), the wavelet combined with 2nd order lattice infinite impulse response (IIR) notch filter is proposed to enhance the signal-to-noise ratio (SNR) of signal detected by PD online measurement system of transformers. We present the results from simulations and real data examples.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"49 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":"121448708","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
Effect of multistress on the lifetime characteristics of magnet wires used in flyback transformer 多重应力对反激变压器磁体导线寿命特性的影响
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380518
S. Grzybowski, S. Bandaru
{"title":"Effect of multistress on the lifetime characteristics of magnet wires used in flyback transformer","authors":"S. Grzybowski, S. Bandaru","doi":"10.1109/ELINSL.2004.1380518","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380518","url":null,"abstract":"This work presents the results of the effect of multistress on the lifetime characteristics of fine gauge magnet wires used in the flyback transformers, adjustable speed drives, motor windings, ignition coils. Accelerated life tests are performed on AWG 43 gauge Polyesterimide insulated magnet wires. This study uses pulse voltages. Multistress includes high temperature, high frequency, and high voltages. Lifetime analysis provides statistical information such as lifetime characteristics, probability of failures, and lifetime percentiles. This study uses Weibull distribution to model life characteristics. The failure data of the aging tests is used to obtain parameters of the frequency-electrical-thermal life model. The life model is used to describe the behavior of insulation in the presence of multistress and is also used to estimate the lifetime of magnet wires at any desired stress level. The parameters of the frequency-electrical-thermal life model used in this study are obtained by regression analysis.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"246 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":"123116404","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
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