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2007 Electrical Insulation Conference and Electrical Manufacturing Expo最新文献

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On the life estimation of oil impregnated paper insulated transformer bushings 油浸纸绝缘变压器套管的寿命估算
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562578
C. C. Reddy, E. Johnson, T. Ramu
{"title":"On the life estimation of oil impregnated paper insulated transformer bushings","authors":"C. C. Reddy, E. Johnson, T. Ramu","doi":"10.1109/EEIC.2007.4562578","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562578","url":null,"abstract":"Oil impregnated paper (OIP) Bushings are indispensable parts in a power transformer, the failure of which accounts for the failure of power transformer, at least until the fault is detected and mitigated. Normal ageing of bushing insulation is generally independent of conditions within the transformer and therefore can be treated as a stand-alone component. Diagnostic Testing and Condition Monitoring (DTCM) of OIP bushing based on terminal measurements are often inconclusive and at times leads to hazardous conclusions being drawn. A quantitative estimation of remaining service life can be made using the results of specific tests on models. The authors propose controlled accelerated ageing experimental designs on pro-rated OIP bushings. The bushings are aged under different thermal and electrical stresses. Dielectric and other parameters are monitored, over the duration of ageing at different time windows.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130662267","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
PD-source recognition in generator bars using a high-voltage coaxial-type high-pass filter 使用高压同轴型高通滤波器识别发电机棒中的pd源
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562583
M. R. Naghashan, H. Zareie, B. Anvarifar
{"title":"PD-source recognition in generator bars using a high-voltage coaxial-type high-pass filter","authors":"M. R. Naghashan, H. Zareie, B. Anvarifar","doi":"10.1109/EEIC.2007.4562583","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562583","url":null,"abstract":"A high-voltage coaxial-type high-pass filter is reconstructed and used to detect different impulse forms in generator bars. The test results of an old generator bar shows simultaneous occurrence of different discharge impulse forms. In this paper, the error of the band-pass filter used for PD measurement in delaminated aged bars is presented. It is essential to measure both discharge magnitude and discharge pulse forms to minimize the error.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134218295","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
Dynamic modeling of the temporal evolution of DC flashover discharge current with liquid electrolyte and ice pollution layer 液态电解质和冰污染层下直流闪络放电电流时间演化的动态建模
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562611
M. Slama, H. Hadi, S. Flazi
{"title":"Dynamic modeling of the temporal evolution of DC flashover discharge current with liquid electrolyte and ice pollution layer","authors":"M. Slama, H. Hadi, S. Flazi","doi":"10.1109/EEIC.2007.4562611","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562611","url":null,"abstract":"A dynamic model for predicting dc flashover discharge current behavior of electrolyte and ice covered insulating surfaces is presented. The model takes into consideration insulating geometry, pre-contamination level, electrical field on the front of discharge and characteristics of pollution. Assuming discharge behavior as a time dependant resistance, it is possible to determine leakage currents characteristics and time of flashover using Hampton criteria for propagating of discharge and Rumeli criteria for estimating the displacement of the discharge assuming that the electrical breakdown stress on the front of discharge will be determined by the streamer criteria. The simulated results show that the model is in agreement with experimental results and is more appropriate for high resistance of pollution for electrolyte and ice layer.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132922258","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
Electromagnetic principles in manufacturing 制造中的电磁原理
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562631
B. Oni, T. Lemley
{"title":"Electromagnetic principles in manufacturing","authors":"B. Oni, T. Lemley","doi":"10.1109/EEIC.2007.4562631","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562631","url":null,"abstract":"In manufacturing, electrical machines, devices or tools are utilized in the process of transforming the base (raw) materials to the finished product. To the operator of these electrical equipments, the visible responses of the equipments when turned on is usually rotation, pull, push, illumination, heat, etc according to the equipment type or application. How these visible responses are produced are often times a subject of curiosity to the equipment operators. This paper uses physical analogies to present the energy conversion process in electrical manufacturing from the invisible electricity building block (electron) to the visible reactions of rotation, actuation, light or heat. The paper also presents some tools for problem solving, process characterization and product characterization to aid individuals engaged in motor or coil manufacturing in the coil or motor manufacturing industry.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129822993","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
Experience with a spider arm rim support failure on a large hydro generator 在大型水轮发电机上处理蜘蛛臂边缘支撑故障的经验
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562624
S. Bomben
{"title":"Experience with a spider arm rim support failure on a large hydro generator","authors":"S. Bomben","doi":"10.1109/EEIC.2007.4562624","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562624","url":null,"abstract":"With the average age of many generators approaching 50 years or more, it is increasingly important that routine inspections are done to identify any machine anomalies. Recently, at Ontario power generation, a routine inspection on one of the hydro pump generators revealed a very serious condition on the rotor spider that was unknown to exist before the inspection took place. Potential catastrophic results were avoided.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132759777","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
Common materials properties characterization techniques for electrical insulating materials 电绝缘材料常用材料性能表征技术
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562618
M. Miller
{"title":"Common materials properties characterization techniques for electrical insulating materials","authors":"M. Miller","doi":"10.1109/EEIC.2007.4562618","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562618","url":null,"abstract":"This paper provides a brief review of materials properties characterization techniques commonly used to determine the performance properties of electrical insulating materials. Verification of the performance properties of insulating materials used in high voltage applications requires the experimenter to understand the capabilities and limitations of the testing methods. An introductory discussion related to benchmarking chemical, thermal, mechanical, and electrical properties using standardized lab practices will be discussed. A basic description of materials properties in relation to the testing methods is also included.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126169972","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
Copper motor rotors: Energy saving efficiency, now also economic feasibility 铜质电机转子:节能高效，现在也经济可行
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562637
M. Thieman, R. Kamm, J. Jørstad
{"title":"Copper motor rotors: Energy saving efficiency, now also economic feasibility","authors":"M. Thieman, R. Kamm, J. Jørstad","doi":"10.1109/EEIC.2007.4562637","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562637","url":null,"abstract":"Replacing aluminum with copper in the die cast squirrel cage conductor bars in electric induction motor rotors has enormous potential benefit in terms of improved efficiency, energy savings, reduced maintenance and reduced weight and cost. Energy savings in the US alone can eventually exceed the output of three to four new 600 megawatt generating plants. The major deterrent to that conversion has been the short tool life associated with casting molten copper. Research sponsored by the Copper Development Association has identified recommended tool materials and casting practices that significantly improve tool life. THT Presses, Inc. has developed a vertical die casting machine with design features especially suitable for casting motor rotors, and have demonstrated capability to cast a wide range of copper motor sizes on that equipment. They now cast copper-alloy motor rotors for customer evaluation and for limited-volume production runs. THT's Sub Liquidus rheocasting process provides future opportunity for even better tool life when die casting copper alloys.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128036910","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
Mapping the humidification range of a single PEM fuel cell 绘制单个PEM燃料电池的加湿范围
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562654
E. Ubong, A. LoPicolo, J. Birdsall, W. Zawadski, S. Sullivan, J. Kavathe
{"title":"Mapping the humidification range of a single PEM fuel cell","authors":"E. Ubong, A. LoPicolo, J. Birdsall, W. Zawadski, S. Sullivan, J. Kavathe","doi":"10.1109/EEIC.2007.4562654","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562654","url":null,"abstract":"A test is conducted on a SO cm single fuel cell to map the operational range for the optimal humidification of PEM membrane. A major challenge to the optimum operation of a proton exchange membrane (PEM) fuel cell lies in maintaining a certain humidification level of the electrolyte. For an optimal operation of a solid polymer fuel cell, correct humidification level of the membrane is desired to enable proton conductivity and prevent drying out with the consequent loss of fuel cell power. On the contrary, if the membrane is over humidified, the cell will flood - a condition in which the humidifying fluid blocks the flow of the reactants to the catalyst sites. To maintain an optimal operation range, a test is conducted at various temperatures, flow rates, current densities and stoichiometry with the intent of mapping the operational range of a 50 cm2 proton exchange fuel cell with an externally mounted humidifier. The result reveals that a dew point temperature range of 65degC presents an acceptable range for the membrane tested. This report focuses on humidification of a single cell, using NAFIONtrade 111 membrane, with air and hydrogen as reactant gases, an external humidification system with the objective of finding the optimal operational range for the cell.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129918348","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
Effect of voltage distortion on stress grading coatings working at high fundamental frequency 电压畸变对高基频下应力分级涂层的影响
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562610
F. Espino-cortes, P. G. Zamorano, A.R. Rosario
{"title":"Effect of voltage distortion on stress grading coatings working at high fundamental frequency","authors":"F. Espino-cortes, P. G. Zamorano, A.R. Rosario","doi":"10.1109/EEIC.2007.4562610","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562610","url":null,"abstract":"Stress grading coatings used in high voltage rotating machines are considerably affected when the machines are controlled by adjustable speed drives. A special case is found in high speed machines where an excessive heat generation in the stress grading coatings can destroy the material in a short time. The coatings are subject not only to voltage of the fundamental frequency above hundred Hertz, but also to voltage of a higher frequency distortion associated with the switching devices used in the drive. In this work, the performance of stress grading coatings under the combined effect of a high fundamental frequency and voltage distortion is studied. By using a simplified model, which takes into account the nonlinear behavior of the material, the resistive heat for different voltage distortion conditions is computed. The combined high fundamental frequency and voltage distortion significantly increases the heat generation in the stress grading system.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"252 19","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120863383","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
Lightweight partially nano-particled polymer concrete: A new concept for electrical insulation 轻量化部分纳米颗粒聚合物混凝土:电绝缘新概念
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562613
M. Gunasekaran
{"title":"Lightweight partially nano-particled polymer concrete: A new concept for electrical insulation","authors":"M. Gunasekaran","doi":"10.1109/EEIC.2007.4562613","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562613","url":null,"abstract":"Polymer concrete is now well established in many parts of the world as a viable HV insulating material. By the utilization of specially selected lightweight fillers and invoking the principles of nanotechnology a new concept of polymer concrete with far reaching implications appears to be eminently feasible. This paper discusses this new concept in the context of already known information on normal weight polymer concrete and points to needed research to reduce the concept to routine practice in the electric utility, aerospace and nautical industries.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123190437","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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