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2010 IEEE International Symposium on Electrical Insulation最新文献

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Electric field evaluation on high voltage outdoor insulation by means of finite element method 用有限元法评价高压室外绝缘的电场
2010 IEEE International Symposium on Electrical Insulation Pub Date : 2010-06-06 DOI: 10.1109/ELINSL.2010.5549536
Chao Zhang, J. J. Kester, C. W. Daley, S. Rigby
{"title":"Electric field evaluation on high voltage outdoor insulation by means of finite element method","authors":"Chao Zhang, J. J. Kester, C. W. Daley, S. Rigby","doi":"10.1109/ELINSL.2010.5549536","DOIUrl":"https://doi.org/10.1109/ELINSL.2010.5549536","url":null,"abstract":"In this paper the validity of a finite element method based analysis tool, ElecNet software, has been demonstrated to calculate the electric field distribution in high voltage surge arresters. First, a one column porcelain surge arrester model described in IEC 60099-4, Annex L was simulated with ElecNet. The calculation results were then compared with the modeling results published in IEC 60099-4. Generally, the curve of the voltage stress along the arrester column is very similar and the difference in maximum voltage stresses in different units is within 10%. Second, ElecNet was used to calculate the electric field distribution of the three-column surge arrester model with different grading designs. The simulation results suggest that the effect of spacing between the two grading rings on the voltage distribution is very significant. The top unit voltage steadily decreases with the increasing of spacing between the two grading rings. The results also show that grading rings with larger tubing diameter have superior grading properties than grading rings with smaller tubing diameters. However, voltage distribution is not significantly affected by the spacing between the three parallel columns. The simulation also gives an optimized design of grading rings for this three-column surge arrester model which exhibits satisfactory electrical performance.","PeriodicalId":138874,"journal":{"name":"2010 IEEE International Symposium on Electrical Insulation","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116640791","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: 2
P-Laser: Breakthrough in power cable systems P-Laser:电力电缆系统的突破
2010 IEEE International Symposium on Electrical Insulation Pub Date : 2010-06-06 DOI: 10.1109/ELINSL.2010.5549826
S. Belli, G. Perego, A. Bareggi, L. Caimi, F. Donazzi, E. Zaccone
{"title":"P-Laser: Breakthrough in power cable systems","authors":"S. Belli, G. Perego, A. Bareggi, L. Caimi, F. Donazzi, E. Zaccone","doi":"10.1109/ELINSL.2010.5549826","DOIUrl":"https://doi.org/10.1109/ELINSL.2010.5549826","url":null,"abstract":"New thermoplastic insulating compounds, High Performance Thermoplastic Elastomer (HPTE), were developed in Prysmian and represent a breakthrough in the field of MV and HV power cables. These materials gather good electrical and thermomechanical properties, comparable or even superior to those of XLPE, and are flexible and soft even though polypropylene based. The physico-chemical properties of HPTE can be tuned by changing crystallinity and other physico-chemical properties, tailoring the material for specific applications.","PeriodicalId":138874,"journal":{"name":"2010 IEEE International Symposium on Electrical Insulation","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116950783","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
Design and shop testing for XIANG JIA BA 23kV stator winding “湘家霸”23kV定子绕组设计及车间试验
2010 IEEE International Symposium on Electrical Insulation Pub Date : 2010-06-06 DOI: 10.1109/ELINSL.2010.5549740
T. Klamt, Zhongguo Yang
{"title":"Design and shop testing for XIANG JIA BA 23kV stator winding","authors":"T. Klamt, Zhongguo Yang","doi":"10.1109/ELINSL.2010.5549740","DOIUrl":"https://doi.org/10.1109/ELINSL.2010.5549740","url":null,"abstract":"For the Xiang Jia Ba hydro power plant, the biggest air-cooled hydro generator with an output of 888.8 MVA will be installed. These machines are designed with a 23kV stator winding. This rated voltage finally allows an optimized electrical design of the entire machine, considering the project specific speed and output. In general, rated voltages above 20 kV offer a new potential for the overall optimization of large hydro units.","PeriodicalId":138874,"journal":{"name":"2010 IEEE International Symposium on Electrical Insulation","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117117311","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
Dielectric study with epoxy-based nanostructured microcomposites containing silica 含二氧化硅的环氧基纳米微复合材料的介电性能研究
2010 IEEE International Symposium on Electrical Insulation Pub Date : 2010-06-06 DOI: 10.1109/ELINSL.2010.5549783
M. Frechette, H. D. Martinez, S. Savoie, A. Krivda, L. Schmidt, D. Zegarac
{"title":"Dielectric study with epoxy-based nanostructured microcomposites containing silica","authors":"M. Frechette, H. D. Martinez, S. Savoie, A. Krivda, L. Schmidt, D. Zegarac","doi":"10.1109/ELINSL.2010.5549783","DOIUrl":"https://doi.org/10.1109/ELINSL.2010.5549783","url":null,"abstract":"Material samples were prepared consisting of silica particles in an epoxy matrix. The generic compound contained a large amount of micrometric silica (e.g. 60% wt.) and a few % of nanosilica. Investigation of the microstructure of the samples showed that indeed the microcomposites exhibited a nanostructured morphology. Dielectric spectroscopy was used to compare the behavior of materials differing in composition. Posttreatment using heat was necessary to obtain a reproducible dielectric response. Dielectric features linked to the material compositions were annotated. For the case of 65-% total wt. silica, it was found that when the nanophase varies from 0 to 5%, the increase in the dielectric constant could fluctuate by as much as 10% in the low-frequency range.","PeriodicalId":138874,"journal":{"name":"2010 IEEE International Symposium on Electrical Insulation","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126599796","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: 14
EMTP simulation of induced overvoltage in low voltage system 低压系统感应过电压的EMTP仿真
2010 IEEE International Symposium on Electrical Insulation Pub Date : 2010-06-06 DOI: 10.1109/ELINSL.2010.5549828
T. Pham, Nhung Pham, Top V. Tran
{"title":"EMTP simulation of induced overvoltage in low voltage system","authors":"T. Pham, Nhung Pham, Top V. Tran","doi":"10.1109/ELINSL.2010.5549828","DOIUrl":"https://doi.org/10.1109/ELINSL.2010.5549828","url":null,"abstract":"Shielded by high structure surrounding and with short length of power line, low voltage system is seldom suffered from direct strokes. However, this system is especially threatened by induced voltage due to nearby strokes. The effects of induced overvoltage may be very harmful to power quality and to low BIL peculiar to electrical equipment in low voltage system. In this work, the induced overvoltage in a typical low voltage system in rural areas of Vietnam will be investigated by EMTP/ATP simulation. Rusk model is used to simulate the current source affecting the low voltage system. The influence of grounding resistance in consumer side and the size of load will be analyzed. The discussion and results may provide useful information in insulation coordination of low voltage system.","PeriodicalId":138874,"journal":{"name":"2010 IEEE International Symposium on Electrical Insulation","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122607720","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
On-load tap changer diagnosis: Interpretation of dynamic resistance deviations 有载分接开关诊断:动态电阻偏差的解释
2010 IEEE International Symposium on Electrical Insulation Pub Date : 2010-06-06 DOI: 10.1109/ELINSL.2010.5549787
J. Erbrink, E. Gulski, J. Smit, R. Leich, P. Seitz, B. Quak
{"title":"On-load tap changer diagnosis: Interpretation of dynamic resistance deviations","authors":"J. Erbrink, E. Gulski, J. Smit, R. Leich, P. Seitz, B. Quak","doi":"10.1109/ELINSL.2010.5549787","DOIUrl":"https://doi.org/10.1109/ELINSL.2010.5549787","url":null,"abstract":"This paper discusses the recently developed analysis method for service aged power transformers equipped with an OLTC: dynamic resistance measurements (DRM). Because the on-load tap changer contributes to many power transformer failures the emphasis is on OLTC diagnosis. Off-line diagnosis of on-load tap changers during regular maintenance can detect maintenance errors and assess the condition of OLTC parts not accessible for inspection. DRM can be valuable to on-load tap changer (OLTC) condition assessment because of the large variety of defects and OLTC degradation mechanisms that can be found. This paper deals with the results that can be measured with DRM. Besides undisturbed DRM-data, most common deviations originating from degraded and defect tap changers will be discussed. It is explained how these different types of defects appear in the DRM results. The location and shape of the deviation can be used to find the cause and importance of the defect. A subdivision is made between OLTC's in good condition, OLTC's with increased contact resistance, OLTC's with open contacts and OLTC's with deviating switch times. By doing so, an overview of possible DRM results is gained. The seriousness of the defects is also discussed in this paper. Differences between the DRM results of different types of OLTC's will be discussed by showing results of DRM tests. Most graphs presented in this paper are recorded on service-aged OLTC's in the Dutch utility grid. Some measurement results are performed during experiments in a high voltage laboratory.","PeriodicalId":138874,"journal":{"name":"2010 IEEE International Symposium on Electrical Insulation","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114290107","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
Consequences of state of the art transformer condition assessment 最先进的变压器状态评估结果
2010 IEEE International Symposium on Electrical Insulation Pub Date : 2010-06-06 DOI: 10.1109/ELINSL.2010.5549840
L. Arvidsson
{"title":"Consequences of state of the art transformer condition assessment","authors":"L. Arvidsson","doi":"10.1109/ELINSL.2010.5549840","DOIUrl":"https://doi.org/10.1109/ELINSL.2010.5549840","url":null,"abstract":"The lack of the transformer community to accept the fact that transformers are chemical reactors that follow the laws of both physics and chemistry has lead to the creation of many misunderstandings with regards to transformer condition assessment and also is the reason why understanding the corrosive sulfur problem has taken such a long time. This paper is reports the results of an condition assessment made on a population of 30 GSU owned by a major power producer.","PeriodicalId":138874,"journal":{"name":"2010 IEEE International Symposium on Electrical Insulation","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122162797","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
A new approach to quantitatively evaluate aging. Case study: Epoxy-mica 一种定量评价老化的新方法。案例研究:环氧云母
2010 IEEE International Symposium on Electrical Insulation Pub Date : 2010-06-06 DOI: 10.1109/ELINSL.2010.5549751
L. Lamarre, É. David
{"title":"A new approach to quantitatively evaluate aging. Case study: Epoxy-mica","authors":"L. Lamarre, É. David","doi":"10.1109/ELINSL.2010.5549751","DOIUrl":"https://doi.org/10.1109/ELINSL.2010.5549751","url":null,"abstract":"Polarization/Depolarization current (PDC) measurements, when recorded for a sufficient long time, provide curves that exhibit a straight portion, usually in the range of a few seconds up to a few tens of seconds. These straight portions fit closely a straight line, when the current data is plotted on Log-Log scales. This applies particularly well for the depolarization current curve. Using the A t−n law, it is possible to evaluate the exponent n with good accuracy. As the data base on both field and lab measurements on epoxy-mica, polyester-mica and asphalt-mica insulations got bigger over the years, some trend began to emerge. This paper shows variations of n as a function of the “chronological” age of the insulation, i.e. the time difference between date of fabrication and the date of the measurement. Concurrent factors such as temperature and other aging stress conditions are discussed in the paper by indicating which way they can modulate the behaviour of n versus time.","PeriodicalId":138874,"journal":{"name":"2010 IEEE International Symposium on Electrical Insulation","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126980971","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
Comparison of partial discharge measurement and simulation results for spherical cavities within solid dielectric materials as a function of frequency using Finite Element Analysis method 用有限元方法比较固体介质内球腔局部放电测量与模拟结果与频率的关系
2010 IEEE International Symposium on Electrical Insulation Pub Date : 2010-06-06 DOI: 10.1109/ELINSL.2010.5549733
H. Illias, G. Chen, P. Lewin
{"title":"Comparison of partial discharge measurement and simulation results for spherical cavities within solid dielectric materials as a function of frequency using Finite Element Analysis method","authors":"H. Illias, G. Chen, P. Lewin","doi":"10.1109/ELINSL.2010.5549733","DOIUrl":"https://doi.org/10.1109/ELINSL.2010.5549733","url":null,"abstract":"Partial discharge (PD) is a discharge phenomenon that does not bridge the whole electrodes within a dielectric insulation under high field stress. The measurement of PD activity is used in the insulation diagnosis of high voltage components. A better understanding of PD may be gained from modeling of the discharge process. This paper is an extension from previous works by the same authors which have considered the modeling of PD activity in a spherical cavity within a dielectric material by using Finite Element Analysis (FEA) method to study the influence of applied frequency. However, in this paper, simulation results are compared with measurement results as a function of frequency. From this, the parameters that influence PD frequency dependent behavior have been identified through comparison between experimental measurement and simulation results.","PeriodicalId":138874,"journal":{"name":"2010 IEEE International Symposium on Electrical Insulation","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116347973","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: 7
Comparative evaluation of various grading systems for electric machinery stator windings 电机定子绕组各种分级系统的比较评价
2010 IEEE International Symposium on Electrical Insulation Pub Date : 2010-06-06 DOI: 10.1109/ELINSL.2010.5549547
Saeed Ul Haq, R. Omranipour
{"title":"Comparative evaluation of various grading systems for electric machinery stator windings","authors":"Saeed Ul Haq, R. Omranipour","doi":"10.1109/ELINSL.2010.5549547","DOIUrl":"https://doi.org/10.1109/ELINSL.2010.5549547","url":null,"abstract":"The surface potential characteristics of grading systems of various lengths and configurations used for medium voltage form-wound stator coils have been examined. The grading material used in this investigation was woven polyester fabric tape loaded with a varnish containing a semi-conductive silicon carbide filler. Form-wound stator coils for a machine rating of 13.8 kV (line-to-line) were manufactured. Stress grading tape was applied to the coils using two lapping configurations and with two overall lengths. All sample coils then received a vacuum pressure impregnation (VPI) treatment. The surface field distribution in the stress grading regions of the sample coils was measured at test voltages of 8 kV and 14 kVrms. In addition, the temperature profiles of the grading systems were recorded at applied voltages up to 28.6 kVrms. The experimental results revealed that the stress grading tape lapping configuration has an influence on the field distribution to some degree; however, little or no effect was observed on the field dependent property when the grading length in the endarm region was increased.","PeriodicalId":138874,"journal":{"name":"2010 IEEE International Symposium on Electrical Insulation","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121727865","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
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