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Conference Record of the 2008 IEEE International Symposium on Electrical Insulation最新文献

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Online PD Monitoring of Power Transformers and Rotating Machines 电力变压器和旋转机械的PD在线监测
Conference Record of the 2008 IEEE International Symposium on Electrical Insulation Pub Date : 2008-06-09 DOI: 10.1109/ELINSL.2008.4570343
M. Flubacher, T. Strehl
{"title":"Online PD Monitoring of Power Transformers and Rotating Machines","authors":"M. Flubacher, T. Strehl","doi":"10.1109/ELINSL.2008.4570343","DOIUrl":"https://doi.org/10.1109/ELINSL.2008.4570343","url":null,"abstract":"PD monitoring is recognized today as an essential tool for condition based maintenance strategies for many HV equipment. This paper summarizes the experiences of a PD online monitoring device for power transformers and rotating machines which has been introduced in the market more than five years ago. The concept and design of a typical monitoring system is presented. Some experiences and problems with installed systems are discussed. Finally certain new methods are illustrated and an outlook for future trends and developments in PD monitoring is given.","PeriodicalId":357443,"journal":{"name":"Conference Record of the 2008 IEEE International Symposium on Electrical Insulation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125859205","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
Power-Factor Fluctuation of Directly Water-Cooled Generator-Bar after Water-Penetration inside the Groundwall Insulation 直接水冷发电杆接地墙内保温后的功率因数波动
Conference Record of the 2008 IEEE International Symposium on Electrical Insulation Pub Date : 2008-06-09 DOI: 10.1109/ELINSL.2008.4570327
M. R. Naghashan, M. Farrokhi
{"title":"Power-Factor Fluctuation of Directly Water-Cooled Generator-Bar after Water-Penetration inside the Groundwall Insulation","authors":"M. R. Naghashan, M. Farrokhi","doi":"10.1109/ELINSL.2008.4570327","DOIUrl":"https://doi.org/10.1109/ELINSL.2008.4570327","url":null,"abstract":"A directly water-cooled generator-bar with laboratory tests is presented in this paper. A leak point is made inside the groundwall insulation of the bar. The cooling water migrates along the generator bar through insulation delamination and interstices between copper strands. The speed of water flow inside the insulation is measured during the test period. Capacitance and power-factor mapping tests are carried out along the generator-bar length. The results show that the capacitance and dissipation factor are fluctuated reversely over a period of time. Dissipation factor variation of the generator-bar is higher than the capacitance variation.","PeriodicalId":357443,"journal":{"name":"Conference Record of the 2008 IEEE International Symposium on Electrical Insulation","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123279107","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
Rejuvenation of Insulation in Aged Power Cables 老化电力电缆绝缘的修复
Conference Record of the 2008 IEEE International Symposium on Electrical Insulation Pub Date : 2008-06-09 DOI: 10.1109/ELINSL.2008.4570427
J. Dionne, W. Stagi, W. Chatterton
{"title":"Rejuvenation of Insulation in Aged Power Cables","authors":"J. Dionne, W. Stagi, W. Chatterton","doi":"10.1109/ELINSL.2008.4570427","DOIUrl":"https://doi.org/10.1109/ELINSL.2008.4570427","url":null,"abstract":"Three short cases studies will be documented to highlight the efficacy of silicone rejuvenation technology. The first is a 115 kV class transmission cable from Duke Power, the second will be a 3 phase, 1000 kcmil, 260 mil, 1973 vintage feeder circuit from Dominion Power and the third case will be a 500 kcmil, 1968 vintage Cu, 175 mil XLPE, 15 kV cable that was one of the first treated cables at Dow Corning Corporation. The progress over the years and the great success of silicone cable rejuvenation were discussed.","PeriodicalId":357443,"journal":{"name":"Conference Record of the 2008 IEEE International Symposium on Electrical Insulation","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114893890","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
Judgment of the Quality of HV-Insulating Systems based on Recommended pC μV-Values in International Standards 基于国际标准推荐pC μ v值判断高压绝缘系统质量
Conference Record of the 2008 IEEE International Symposium on Electrical Insulation Pub Date : 2008-06-09 DOI: 10.1109/ELINSL.2008.4570416
J. Fuhr
{"title":"Judgment of the Quality of HV-Insulating Systems based on Recommended pC μV-Values in International Standards","authors":"J. Fuhr","doi":"10.1109/ELINSL.2008.4570416","DOIUrl":"https://doi.org/10.1109/ELINSL.2008.4570416","url":null,"abstract":"The partial discharge (PD) measurement is the most important test for assessment of the condition of any HV-insulating system. On the other hand an error-free detection and correct interpretation of measured PD-activity during commissioning tests in the HV-laboratory or on-site, is still a topic for a dispute especially in case when the HV-component does not fulfill the specified requirements recommended in the International Standards. Based on more than 15 years experience in PD-measurements and interpretation, three most frequently observed effects responsible for large measuring errors and misleading analysis of PD-results are discussed in this contribution.","PeriodicalId":357443,"journal":{"name":"Conference Record of the 2008 IEEE International Symposium on Electrical Insulation","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116043652","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
Vibration Sparking and Slot Discharge in Stator Windings 定子绕组的振动火花和槽放电
Conference Record of the 2008 IEEE International Symposium on Electrical Insulation Pub Date : 2008-06-09 DOI: 10.1109/ELINSL.2008.4570298
G. Stone, C. Maughan
{"title":"Vibration Sparking and Slot Discharge in Stator Windings","authors":"G. Stone, C. Maughan","doi":"10.1109/ELINSL.2008.4570298","DOIUrl":"https://doi.org/10.1109/ELINSL.2008.4570298","url":null,"abstract":"In the late 1980s and again in the past few years, some turbine generator stator windings have apparently failed due to a mechanism variously referred to as spark erosion or vibration sparking. The mechanism can produce relatively intense sparking between the surface of the stator bar and the core. The intensity of the sparking is such that it may erode the groundwall insulation much more quickly than slot discharges. Unlike the normal loose coil/slot discharge failure process, spark erosion can happen anywhere in the winding, and not just in stator bars that are operating at high voltage. For this mechanism to occur, apparently (a) the partly conductive slot coating much be much more conductive than normal; and (b) the bar must be loose in the slot and vibrating under the magnetic forces.","PeriodicalId":357443,"journal":{"name":"Conference Record of the 2008 IEEE International Symposium on Electrical Insulation","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122978892","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
Fault Diagnosis of Power Transformer Using SVM and FCM 基于SVM和FCM的电力变压器故障诊断
Conference Record of the 2008 IEEE International Symposium on Electrical Insulation Pub Date : 2008-06-09 DOI: 10.1109/ELINSL.2008.4570291
Dae-Jong Lee, Jong-Pil Lee, P. Ji, Jae-Woon Park, Jae-Yoon Lim
{"title":"Fault Diagnosis of Power Transformer Using SVM and FCM","authors":"Dae-Jong Lee, Jong-Pil Lee, P. Ji, Jae-Woon Park, Jae-Yoon Lim","doi":"10.1109/ELINSL.2008.4570291","DOIUrl":"https://doi.org/10.1109/ELINSL.2008.4570291","url":null,"abstract":"In this study, we are concerned with fault diagnosis of power transformer. The objective is to explore the use of some advanced techniques such as SVM and FCM and quantify their effectiveness when dealing with dissolved gases extracted from power transformers. The proposed fault diagnosis system consists of data acquisition, fault/normal diagnosis, identification of fault and analysis of aging degree parts. In data acquisition part, concentrated gases are extracted from transformer for data gas analysis. In fault/normal diagnosis part, SVM is performed to separate normal state from fault types. The determination of fault type is executed by multi-class SVM in identification part. Although the inputted data is normal state, the analysis of aging degree is performed by considering the distance measure calculated by comparing with reference model constructed by FCM and input data. Our approach makes it possible to measure the possibility and degree of aging in normal transformer as well as the identification of faults in abnormal transformer. As the simulation results to verify the effectiveness, the proposed method showed more improved classification results than conventional methods.","PeriodicalId":357443,"journal":{"name":"Conference Record of the 2008 IEEE International Symposium on Electrical Insulation","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129876094","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
Identification of Partial Discharge Phenomena in HVDC Apparatus 高压直流装置局部放电现象的识别
Conference Record of the 2008 IEEE International Symposium on Electrical Insulation Pub Date : 2008-06-09 DOI: 10.1109/ELINSL.2008.4570352
H. Niu, A. Cavallini, G. Montanari
{"title":"Identification of Partial Discharge Phenomena in HVDC Apparatus","authors":"H. Niu, A. Cavallini, G. Montanari","doi":"10.1109/ELINSL.2008.4570352","DOIUrl":"https://doi.org/10.1109/ELINSL.2008.4570352","url":null,"abstract":"Detecting insulation flaws in HVDC apparatus, where partial discharge (PD) may occur can help preventing failures, even if the degradation rate under PD is much slower than in AC conditions. In order to improve reliability of HVDC systems and, in particular of HVDC transmission lines, it would be important to distinguish defects of different harmfulness. However, under DC voltage the concept of phase-resolved PD pattern loses meaning and conventional techniques for PD source identification are no longer applicable. Techniques based on the statistical correlation between subsequent PD events have been proposed to identify PD sources under DC voltage. In this paper, the search for novel features able to characterize different phenomena (that can be described in broad terms as internal, surface and corona PD) is carried out. In particular, besides additional markers that have not been presented yet in literature, it is proposed to exploit the polarity- and voltage-dependent characteristics of different PD phenomena.","PeriodicalId":357443,"journal":{"name":"Conference Record of the 2008 IEEE International Symposium on Electrical Insulation","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128614701","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: 27
Modeling electromagnetic field radiated by Lightning coupling to overhead transmission lines 雷电耦合对架空输电线路辐射电磁场的建模
Conference Record of the 2008 IEEE International Symposium on Electrical Insulation Pub Date : 2008-06-09 DOI: 10.1109/ELINSL.2008.4570277
N. M'ziou, L. Mokhnache, A. Boubakeur
{"title":"Modeling electromagnetic field radiated by Lightning coupling to overhead transmission lines","authors":"N. M'ziou, L. Mokhnache, A. Boubakeur","doi":"10.1109/ELINSL.2008.4570277","DOIUrl":"https://doi.org/10.1109/ELINSL.2008.4570277","url":null,"abstract":"The major aim of our investigations is the computation of the voltages induced by an external transient electromagnetic excitation, especially due to the lightning discharge coupling to overhead transmission line networks. In this paper we propose a hybrid method for evaluating the electromagnetic field radiated by lightning The Agrawal et al. model coupling model will be used in order to analyse the lightning-induced disturbances in overhead transmission line networks.","PeriodicalId":357443,"journal":{"name":"Conference Record of the 2008 IEEE International Symposium on Electrical Insulation","volume":"115 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129023387","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
Partial discharge activity in presence of pulsed waveforms 脉冲波形存在时的局部放电活动
Conference Record of the 2008 IEEE International Symposium on Electrical Insulation Pub Date : 2008-06-09 DOI: 10.1109/ELINSL.2008.4570342
F. Guastavino, A. Dardano, A. Ratto, E. Torello
{"title":"Partial discharge activity in presence of pulsed waveforms","authors":"F. Guastavino, A. Dardano, A. Ratto, E. Torello","doi":"10.1109/ELINSL.2008.4570342","DOIUrl":"https://doi.org/10.1109/ELINSL.2008.4570342","url":null,"abstract":"Partial discharge (PD) measurements can be a very powerful tool for the condition assessment of electrical insulation systems. When applied to rotating machines or winding insulation mock-ups, if pulsed power supplies are considered (PWM), PD measurement can provide not only an \"on/off output about the presence or not of PD pulses but could also provide information about the degradation processes. In this paper the outcome of digital PD acquisitions, performed applying both sinusoidal and pulsed voltage waveform, is proposed, evidencing how the PD activity and the relevant PD patterns can be affected by the voltage waveform and by the voltage amplitude.","PeriodicalId":357443,"journal":{"name":"Conference Record of the 2008 IEEE International Symposium on Electrical Insulation","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124686366","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: 15
Dielectric response of laboratory aged PE cables 实验室老化PE电缆的介电响应
Conference Record of the 2008 IEEE International Symposium on Electrical Insulation Pub Date : 2008-06-09 DOI: 10.1109/ELINSL.2008.4570414
S. Bernier, J. Parpal, É. David, D. Jean, D. Lalancette
{"title":"Dielectric response of laboratory aged PE cables","authors":"S. Bernier, J. Parpal, É. David, D. Jean, D. Lalancette","doi":"10.1109/ELINSL.2008.4570414","DOIUrl":"https://doi.org/10.1109/ELINSL.2008.4570414","url":null,"abstract":"A time domain spectroscopy (TDS) measuring device has been developed at the Institut de recherche d'Hydro-Quebec (IREQ) to characterize the dielectric losses of HV polymeric insulation and a diagnostic is also proposed to assess the water-tree aging of polyethylene. The results obtained on new and aged miniature polyethylene (PE) cable samples show that: (i) the depolarization losses are strongly dependant on the polarization time and on temperature and (ii) the polarization and depolarization losses show a linear dependence with water-tree polyethylene degradation.","PeriodicalId":357443,"journal":{"name":"Conference Record of the 2008 IEEE International Symposium on Electrical Insulation","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130327604","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
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