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

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Evaluation of 23 kV insulator profiles with different pollution levels 不同污染程度的23kv绝缘子剖面评价
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380565
R. Herndndez-Corona, I. Ramírez Vázquez, G. Montoya-Tena
{"title":"Evaluation of 23 kV insulator profiles with different pollution levels","authors":"R. Herndndez-Corona, I. Ramírez Vázquez, G. Montoya-Tena","doi":"10.1109/ELINSL.2004.1380565","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380565","url":null,"abstract":"Insulators used for 23 kV distribution lines working under high pollution conditions were removed from field. These insulators were evaluated in a fog chamber. The results showed that the insulator profile has a strong effect on the performance of the insulator under very heavy pollution and humidity conditions. Insulators having a simple profile electrically failed under light pollution conditions. While, insulators having a complex profile did not fail under very heavy pollution conditions. The results obtained for each insulator evaluated are presented in This work.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"67 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":"117350309","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
VHF PD detection of 110 kV XLPE cable accessories 110kv交联聚乙烯电缆附件VHF PD检测
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380598
Wei Wang, Bin Wei, Chengrong Li, L. Ding, Changyu Li, Dong Liu
{"title":"VHF PD detection of 110 kV XLPE cable accessories","authors":"Wei Wang, Bin Wei, Chengrong Li, L. Ding, Changyu Li, Dong Liu","doi":"10.1109/ELINSL.2004.1380598","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380598","url":null,"abstract":"Partial discharge (PD) can indicate defects in HV XLPE cable accessories. A new land of split-core PD sensor is designed that can be easy installed on-site and used safely, and has a bandwidth from 3 MHz to 60 MHz. A model of a cable accessory was made and some typical PD phenomena in this accessory were simulated, such as sliding discharge, floating discharge and cavity discharge. PD tests were made to find the features of the defects. The data from the tests were analyzed and the spectra of different types of PD were plotted using statistical parameters to reveal the feature of the different patterns of PD. The split-core PD sensor has been used on-site after sample testing in the laboratory. More than twenty cases of on-line PD detection for 110 kV XLPE cables have been obtained.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"44 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":"116892011","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
Improvements to the performance of silicone rubber housed composite bushings by means of a resistive coating 通过电阻涂层改善硅橡胶外壳复合衬套的性能
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380577
H.J. Wei, E. Cherney, S. Jayaram
{"title":"Improvements to the performance of silicone rubber housed composite bushings by means of a resistive coating","authors":"H.J. Wei, E. Cherney, S. Jayaram","doi":"10.1109/ELINSL.2004.1380577","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380577","url":null,"abstract":"Local discharges in the vicinity of the mounting flange of composite bushings due to the electric field enhancement and dry band arcing on the surface of composite bushings can cause insulating material degradation leading to failure of the bushing. A proposed solution to this problem by employing a resistive silicone rubber coating on composite HV bushings was investigated. Good agreement was obtained between computer software simulation by FEMLAB/spl reg/ and measurement results of potential and field distributions. Wetting and salt-fog chamber tests verified that the resistive silicone rubber coated composite bushings have superior contamination performance.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"11 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":"114164681","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
Optimal sampling rate for wavelet-based denoising in PD measurement PD测量中基于小波去噪的最佳采样率
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380494
X. Zhou, C. Zhou, B. Stewart, A. Nesbitt
{"title":"Optimal sampling rate for wavelet-based denoising in PD measurement","authors":"X. Zhou, C. Zhou, B. Stewart, A. Nesbitt","doi":"10.1109/ELINSL.2004.1380494","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380494","url":null,"abstract":"Extracting PD pulses from excessively noisy environment has been a crucial issue in PD on-line measurement. DWT as a powerful mathematical tool has proven its effectiveness in PD measurement denoising. The paper presents a method on how to achieve an improved denoising effect at an optimal sampling rate in DWT. It reveals the relationship between the sampling rate and the frequency band in wavelet analysis and contrasts the distribution of a PD signal and white noise along the decomposition levels. A set of 3 PD pulses produced by a narrow band detector immersed in white noise are processed at different sampling rates to verify the effectiveness of the proposed method.","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":"114766537","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
Online multisensor monitoring system for insulation condition of oil-immersed power transformer 油浸式电力变压器绝缘状态多传感器在线监测系统
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380464
Wenxing Zhao, Guanjun Zhang, Yan Sun, Zhang Yan, Dazhi Xu
{"title":"Online multisensor monitoring system for insulation condition of oil-immersed power transformer","authors":"Wenxing Zhao, Guanjun Zhang, Yan Sun, Zhang Yan, Dazhi Xu","doi":"10.1109/ELINSL.2004.1380464","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380464","url":null,"abstract":"An online monitoring and diagnostic system for a 220 kV oil-immersed power transformer with 3 windings has been established in a substation of China. The operation monitoring and insulation condition evaluation were integrated into this system. Many sensors were applied to monitor multiple insulation items such as partial discharge, dissolved gas, moisture in oil, oil temperature, coil hot spot temperature, iron core current, bushing condition and so on. The structure of the system was introduced and a diagnostic flow, via information fusion technology, was presented. Based on the system, it is easy to obtain the operating condition and insulation condition of the transformer.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"44 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":"121601940","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
Comparative evaluation of glass conducting armour materials for form-wound stator coils 形绕式定子线圈玻璃导电护甲材料的比较评价
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380527
M. Stranges, J. Hayward, R. Omranipour, J. Dymond
{"title":"Comparative evaluation of glass conducting armour materials for form-wound stator coils","authors":"M. Stranges, J. Hayward, R. Omranipour, J. Dymond","doi":"10.1109/ELINSL.2004.1380527","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380527","url":null,"abstract":"Semiconducting armour tape with a particulate-loaded binder is typically used for maintaining the ground potential plane within the slot section of a vacuum-pressure impregnated (ATI) stator coil. This paper compares the measured resistances as a function of distance from the ground plane for three commercially available semiconducting glass armour tapes. Results are presented from room temperature resistance tests performed before and after VPI processing, and from an elevated temperature cycle resistance test on the fully processed bars. Similar previous resistance tests and the relative merits of using woven glass and polyester fleece are discussed. The paper also describes results from voltage endurance (VE) tests on different conducting armour and groundwall configurations, and observations of surface deterioration under the ground plane.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"172 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":"123017261","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
Characterisation of partial discharge behaviour in liquid nitrogen 液氮部分放电行为的表征
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380488
D. Swaffield, P. Lewin, Y. Tian, G. Chen, S. Swingler
{"title":"Characterisation of partial discharge behaviour in liquid nitrogen","authors":"D. Swaffield, P. Lewin, Y. Tian, G. Chen, S. Swingler","doi":"10.1109/ELINSL.2004.1380488","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380488","url":null,"abstract":"Interest in superconductors for use in the transmission and distribution of power has grown since the advent of high temperature superconductors (HTS). The benefits of reduced ohmic losses leading to greater operational efficiency appear attractive to power transmission and distribution companies. Potentially this technology will increase power transfer for the same or lower voltage and for the same or smaller physical dimensions. For the successful employment of this technology in the field, power utilities must be convinced of the operational reliability of designs. Many of these designs make use of liquid nitrogen as the system coolant and also as a dielectric fluid. It is therefore vital that liquid nitrogen be well characterised as a dielectric medium. This work describes an experiment to characterise partial discharge behaviour in a nonuniform field geometry. A technique is described which allows synchronised capture and measurement of apparent charge and images of density change streamer activity. A /spl phi/qn analysis of AC results has been completed and characterisation of partial discharge behaviour is presented and discussed.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"13 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":"115340402","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: 10
Equipment health rating of power transformers 电力变压器设备健康等级
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380501
N. Dominelli
{"title":"Equipment health rating of power transformers","authors":"N. Dominelli","doi":"10.1109/ELINSL.2004.1380501","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380501","url":null,"abstract":"Transformers are major components of the power delivery system. In North America, a large proportion of them are approaching their end of design life and in need of replacement or refurbishment A program has been developed to assist engineers to diagnose and assess the health of power transformers. The program uses test and inspection data and equipment information such as nameplate, known design problems, operating history, and age to determine the equipment's health rating. The program calculates condition indexes of transformer components then combines them into an equipment health rating. Although the program automatically calculates such values, it also allows for experts to provide diagnostics and make recommendation on intervention, and to review all the final rating . The results can be used to quickly assess equipment health and provide comparison within a substation or the entire utility for asset management. Examples and case histories are used to show the merits and applications of the program for BC Hydro's system.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"159 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":"115578613","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: 34
A technique for defect investigation in pulse-controlled motors through partial discharge measurements 通过局部放电测量的脉冲控制电机缺陷检测技术
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380516
D. Fabiani, A. Cavallini, G. Montanari, A. Caprara
{"title":"A technique for defect investigation in pulse-controlled motors through partial discharge measurements","authors":"D. Fabiani, A. Cavallini, G. Montanari, A. Caprara","doi":"10.1109/ELINSL.2004.1380516","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380516","url":null,"abstract":"This paper presents a procedure for the investigation of partial discharge (PD) sources in PWM-controlled motors, based on off-line measurements under bipolar squarewaves. PD measurements were carried out on three-phase motors with open-star windings and different configurations, e.g., one phase supplied while the other two were grounded, two phases connected in series, grounding the motor frame. The voltage waveforms generated by a power supply and applied to motor windings was recorded at the winding terminals, for each test configuration. These measurements allowed to highlight winding positions where insulation can be overstressed by uneven voltage distribution, as occurs on motors in service. By comparing partial discharge measurement patterns along windings and under different test configurations, a qualitative evaluation of the location of partial discharge sources inside the tested motors was carried out.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"19 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":"125268874","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
Experience with diagnostic tools for condition assessment of large power transformers 有使用大型电力变压器状态评估诊断工具的经验
Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380668
J. Fuhr, T. Aschwanden
{"title":"Experience with diagnostic tools for condition assessment of large power transformers","authors":"J. Fuhr, T. Aschwanden","doi":"10.1109/ELINSL.2004.1380668","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380668","url":null,"abstract":"The application of advanced off-line methods and procedures for condition assessment of new and service-aged power transformers are discussed. The selection of the diagnostic methods is based on the main operational stresses (electrical, mechanical, thermal) and on typical failure modes: (1) detection of polar components in the paper/oil insulating system using frequency domain spectroscopy (FDS) or using measurements of polarisation/depolarisation currents (PDC) in the time domain, (2) localization of inhomogeneities in the insulating system using sensitive partial discharge detection (PD) and (3) detection of deformations and movement of windings in the active part using measurement of the transfer function (FRA).","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"7 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":"127526694","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: 13
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