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

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Thermal mechanical performance test on suspended insulators for transmission line 输电线路悬挂绝缘子热机械性能试验
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380563
S. Han, H.G. Cho
{"title":"Thermal mechanical performance test on suspended insulators for transmission line","authors":"S. Han, H.G. Cho","doi":"10.1109/ELINSL.2004.1380563","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380563","url":null,"abstract":"This study described some basic performance tests and accelerated ageing test by cool-heat cycling methods and thermal mechanical performance test methods on alumina porcelain insulators (new and aged) used for transmission lines in Korea. There were no failures in electrical and mechanical performance tests such as high voltage strength, flashover voltage, impact strength, etc. in any of the samples. However in the case of accelerated ageing tests above 90 /spl deg/C temperature gradient, fracture phenomena occurred by a thermal shock in the aged samples with low aluminous porcelain body. It was found that sample A was more severely aged than other samples. According to results of the HRB test and microstructural analysis, it was reasoned that insulator bodies with the matrix reinforced with alumina crystalline phase have advantages in the suppression of crack propagation. Cool-heat aging and mechanical thermal aging tests show that a temperature gradient is more effective for acceleration of the aging than variation in the number of cycles.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"204 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":"116182488","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
Experiments for the life assessment of generator bars 发电机棒的寿命评估实验
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380415
M. R. Naghashan
{"title":"Experiments for the life assessment of generator bars","authors":"M. R. Naghashan","doi":"10.1109/ELINSL.2004.1380415","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380415","url":null,"abstract":"In order to estimate the remaining life of a hydro power plant generator bars in Iran, one new and four old stator bars of the generator are tested under combined electrical, thermal and mechanical aging stresses. Partial discharge quantity (total integrated charge of the bars in cooling-down period) before and during the aging is used for the life assessment.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"65 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":"122738986","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
Threshold selection for wavelet denoising of partial discharge data 局部放电数据小波去噪的阈值选择
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380450
P. Agoris, S. Meijer, E. Gulski, J. Smit
{"title":"Threshold selection for wavelet denoising of partial discharge data","authors":"P. Agoris, S. Meijer, E. Gulski, J. Smit","doi":"10.1109/ELINSL.2004.1380450","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380450","url":null,"abstract":"UHF partial discharge (PD) measurements taken onsite are frequently affected by noise due to external disturbances. In order to locate the discharge source, the PD-signals have to be accurately processed to calculate the arrival time in each sensor. A wavelet based denoising technique is used to isolate the PD signals from the noise. The technique utilizes the one-dimensional discrete wavelet transform and the soft and hard thresholding are compared. Crucial is the choice of threshold level, distinguishing between coefficients related with noise and those associated with the PD signal. Four threshold criteria: the Stein's unbiased risk estimator, its Heuristic variance, the universal logarithmic threshold and the minimax are investigated. Finally, the technique is tested on PD signals detected in a power transformer.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"21 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":"128305097","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: 21
Design of multichannel fringing electric field sensors for imaging. Part I. General design principles 成像用多通道边缘电场传感器的设计。第一部分:总体设计原则
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380616
X.B. Li, S. D. Larson, A. Zyuzin, A. Mamishev
{"title":"Design of multichannel fringing electric field sensors for imaging. Part I. General design principles","authors":"X.B. Li, S. D. Larson, A. Zyuzin, A. Mamishev","doi":"10.1109/ELINSL.2004.1380616","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380616","url":null,"abstract":"Multichannel electric field sensors are used for electrical impedance and capacitance tomography applications. In cases where only one-sided access can be accommodated, fringing electric field sensors (FEF) sensors are used. The genera! design principles of multichannel fringing electric field sensors are discussed in This work. Analysis of the figures of merit of FEF sensors, such as penetration depth, signal strength, measurement sensitivity, and imaging resolution, are presented. The effects of design parameters on sensor performance are also evaluated. The qualitative design principles described in this part of the paper provide intuitive guidelines for the simulation-based design optimization procedure to be presented in the second part of the paper.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"129 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":"121538787","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: 28
A review of artificial contamination withstand test methods of high voltage outdoor insulators 高压室外绝缘子抗人工污染试验方法综述
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380559
A. Naderian, M. Sanaye-Pasand, H. Mohseni
{"title":"A review of artificial contamination withstand test methods of high voltage outdoor insulators","authors":"A. Naderian, M. Sanaye-Pasand, H. Mohseni","doi":"10.1109/ELINSL.2004.1380559","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380559","url":null,"abstract":"In This work several important test methods for artificially polluted ceramic and nonceramic insulators have been reviewed. There is no standard test for nonceramic insulators. The research has shown that it is necessary to modify the standard 5000 h salt fog test to evaluate the long-term performance of nonceramic insulators. Although the main parameter for selection of proper ceramic and glass insulators is the amount of pollution, it seems to be necessary to consider other environmental factors for selection of composite insulators. These are average humidity, UV radiation level, wind velocity, rain fall, and dominant type of wetting. This is necessary because research has shown that they directly effect the performance of nonceramic insulators.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"282 2 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":"114258329","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
Stator insulation weak spot localization on a 6 kV synchronous motor 6kv同步电动机定子绝缘薄弱点定位
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380426
H. van Breen, E. Gulski, J. Smit, G. Mijnen
{"title":"Stator insulation weak spot localization on a 6 kV synchronous motor","authors":"H. van Breen, E. Gulski, J. Smit, G. Mijnen","doi":"10.1109/ELINSL.2004.1380426","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380426","url":null,"abstract":"This work presents the results of a stator insulation weak spot localization measurement on a 6 kV 5.5 MVA motor. The motor in question was build in 1953 and its class B insulation system has been in operation ever since. After 50 years of running, the motor was removed and a new one installed. Visual inspection of the stator didn't show any serious damage, tear or wear. The owner intends to use the motor as a replacement motor in case of an emergency. To increase motor reliability, a stator insulation system replacement is considered. Since the visual inspection didn't show any particular reason to replace the entire insulation system, several diagnostic measurements were performed. This paper describes the results of a PD localization measurement performed on this motor. This novel PD localization technique uses the time of flight of the PD signal through the stator core to pin point the actual PD site of every PD occurrence. The measurement technique and its results will be discussed in-depth. The PD localization measurement detected a region in the insulation system with an elevated PD activity. This localized elevated PD activity supports a decision on which region of the insulation system is best suited for replacement. This is in contrast to replacing the entire insulation system.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"89 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":"127023653","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
Progress in resolving flashovers of FRP hot sticks during EHV live line work 超高压带电作业中玻璃钢热棒闪络的解决进展
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380690
W. McDermid, D. Swatek, J. Bromley
{"title":"Progress in resolving flashovers of FRP hot sticks during EHV live line work","authors":"W. McDermid, D. Swatek, J. Bromley","doi":"10.1109/ELINSL.2004.1380690","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380690","url":null,"abstract":"In 1997 a FRP hot stick flashed over during live line work at 550 kV AC. In spite of improvements in the maintenance and testing of the hot sticks, a second flashover occurred during similar work in 2002. A low level of surface pollution is believed to have been the cause of the more recent flashover. Laboratory tests have shown that the leakage distance of the FRP hot stick needs to be substantially greater than the minimum air gap approach distance.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"10 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":"133245627","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
Inspection of high voltage cables using X-ray techniques 使用x射线技术检查高压电缆
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380600
A. Robinson, P. Lewin, S. Sutton, S. Swingler
{"title":"Inspection of high voltage cables using X-ray techniques","authors":"A. Robinson, P. Lewin, S. Sutton, S. Swingler","doi":"10.1109/ELINSL.2004.1380600","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380600","url":null,"abstract":"Defects that are accidentally introduced into high voltage cable joints during manufacture significantly decrease the working lifetime of the cable system. As a measure of quality assurance the joint can be nondestructively tested using X-rays to image the structure of the joint. The image produced can then be inspected for defects such as the thinning of the semiconducting sheaths or the insulation thickness. The location of the boundaries of these insulation components can be found by differentiating the profile of the X-ray image surface. Once these locations are known it is possible to calculate the thickness of these components. These thicknesses can then be used as a measure of quality assurance for the cable joint.","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":"133601410","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
Electroluminescence test to evaluate dielectric property at the interface between semiconductive shield and insulation 评价半导体屏蔽层与绝缘层交界面介电性能的电致发光试验
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380675
S. Han, L. Gross
{"title":"Electroluminescence test to evaluate dielectric property at the interface between semiconductive shield and insulation","authors":"S. Han, L. Gross","doi":"10.1109/ELINSL.2004.1380675","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380675","url":null,"abstract":"The electroluminescence test is a relatively new technique to investigate the dielectric performance of semiconductive shields and crosslinked polyethylene insulation interfaces. It is based on the electric field (voltage) at which light emission occurs as a result of charge injection and carriers recombination for a given sample geometry. A standardized sample geometry with a semicon needle-plane electrode was utilized under amplified voltage in a dry condition to monitor the electroluminescence inception voltages of crosslinked polyethylene (XLPE) and tree retardant crosslinked polyethylene insulation (TR XLPE). It resulted that EL inception voltage of TR XLPE is higher than that of XLPE. In water tree growth test, TR XLPE demonstrated to retard water tree growth under the wet aging condition.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"3 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":"130419165","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
Electrical degradation of fiberglass distribution line poles 玻璃纤维配电线杆的电退化
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380688
X. Li, Stanislaw Grzybowski
{"title":"Electrical degradation of fiberglass distribution line poles","authors":"X. Li, Stanislaw Grzybowski","doi":"10.1109/ELINSL.2004.1380688","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380688","url":null,"abstract":"This work presents experimental results obtained from the electrical degradation of fiberglass distribution line poles. Four types of accelerated aging tests, including single-stress and multistress aging tests, were conducted for various fiberglass samples. Clean fog, salt fog, and 25 kV AC voltage were the aging stresses in these tests. Samples with different surface conditions were also tested in each type of accelerated aging test in order to evaluate the effect of surface conditions on the electrical degradation of fiberglass distribution line poles. The electrical degradation of fiberglass samples is discussed and analyzed through experimental results obtained from the electrical evaluation tests before and after the accelerated aging tests.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"50 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":"131559301","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
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