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1980 IEEE International Conference on Electrical Insulation最新文献

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Environmental effects on the rate of aging of EP insulated power cable 环境对EP绝缘电力电缆老化率的影响
1980 IEEE International Conference on Electrical Insulation Pub Date : 1981-12-01 DOI: 10.1109/TEI.1981.298383
W. Wilkens
{"title":"Environmental effects on the rate of aging of EP insulated power cable","authors":"W. Wilkens","doi":"10.1109/TEI.1981.298383","DOIUrl":"https://doi.org/10.1109/TEI.1981.298383","url":null,"abstract":"The accurate prediction of service life of extruded dielectric power cables from relatively short term laboratory tests has been and continues to be, a challenge for power cable engineers. Incomplete understanding of failure mechanisms and the effect of the many different in-service environmental factors, possible interactions between these factors, and the widely scattered nature of dielectric phenomena contribute to the uncertainties. In this laboratory investigation of the effects of water, water temperature, air temperature, voltage impulses, current loading and their interactions on a shielded 5 kV ethylene propylene rubber (EP) insulated power cable, water and water temperature were found to have the largest effect on dielectric strength. When aged in air for 3 years at 4.5 times rated voltage (the least harmful condition found in the experiment) the average dielectric strength declined to 92% of the original value, however this decline is not statistically significant. When aged in 35°C water for 3 years at 4.5 times rated voltage (the most harmful condition found in the experiment) the dielectric strength declined to 21% of the original value.","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"157 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132435555","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: 8
Electrical breakdown in composite insulating systems: Liquid-solid interface parallel to field 复合绝缘系统中的电击穿:平行于电场的液-固界面
1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-12-01 DOI: 10.1109/TEI.1981.298363
E. Kelley, R. Hebner
{"title":"Electrical breakdown in composite insulating systems: Liquid-solid interface parallel to field","authors":"E. Kelley, R. Hebner","doi":"10.1109/TEI.1981.298363","DOIUrl":"https://doi.org/10.1109/TEI.1981.298363","url":null,"abstract":"A study is presented which identifies some of the characteristics of electrical breakdown at a liquid-solid interface. The primary emphasis is on paper interfaces in transformer oil and studies are performed using impulse and using 60 Hz waveforms. The interfaces are parallel to the electric field. Several cylindrically-symmetric electrode geometries are employed ranging from plane-plane to sphere-sphere. The electrode system is split along the symmetry axis to hold the paper parallel to the field. Among the conclusions drawn from this study are the following: First, the breakdown frequently occurs at positions other than the interface for both impulse and 60 Hz waveforms. Second, no significant difference is identified between the breakdown voltage with or without an interface in the system or between the breakdown voltage when a breakdown occurs at an interface and when it does not.","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115819525","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: 18
Development of bow-tie tree inhibitor 蝴蝶结树抑制剂的研制
1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470913
K. Soma, S. Kuma
{"title":"Development of bow-tie tree inhibitor","authors":"K. Soma, S. Kuma","doi":"10.1109/ICEI.1980.7470913","DOIUrl":"https://doi.org/10.1109/ICEI.1980.7470913","url":null,"abstract":"The state of water in the crosslinked polyethylene insulation subjected to an electrical stress is discussed experimentally and theoretically, and it is concluded that the water vapor condenses by the stress. In consideration of experimental results of the relation between the electrical condensation of water and the generation of bow-tie trees, a generation mechanism of bow-tie trees is proposed. It is expected by the mechanism that the improvement of wettability of the materials may inhibit the generation of bow-tie trees. This consideration introduces new additives. The effect of the additives is examined by slub tests and cable tests. In conclusion, the additives decrease the generation number of bow-tie trees, shorten the lengths, and also suppress the change of the number and the lengths with aging time.","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115312044","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
Heat-stability of mixtures of paraffinic transformer oil with alkylbenzene 烷基苯与石蜡变压器油混合物的热稳定性
1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470858
S. Yasufuku, Y. Ishioka, S. Kobayashi, E. Koyanagi
{"title":"Heat-stability of mixtures of paraffinic transformer oil with alkylbenzene","authors":"S. Yasufuku, Y. Ishioka, S. Kobayashi, E. Koyanagi","doi":"10.1109/ICEI.1980.7470858","DOIUrl":"https://doi.org/10.1109/ICEI.1980.7470858","url":null,"abstract":"Effects of blending alkylbenzenes in a paraffinic base transformer oil were extensively investigated, paying particular attention to their influence upon its heat-stability. Oxidation stability tests of the oil specimens, tube aging tests of Kraft paper/oil electrical insulation systems for oil-filled transformer use and accelerated aging tests of the distribution transformers consisting mainly of the same electrical insulation systems were carried out and their test results were compared with those obtained by use of an actually used, naphthenic mineral oil for oil-filled transformers. It has been pointed out that blending the alkylbenzenes in a paraffinic base oil improves its pour point, gassing tendency and oxidation stability to some extent. As a result of the tube aging tests conducted in a closed nitrogen gas atmosphere it has been clarified that blending the alkylbenzene in a paraffinic base oil improves the degree of deterioration of the Kraft paper, although the paraffinic base oil appears more stable than the alkylbenzene blended one because of having difficult access to oxygen. Moreover, judging from the results of the accelerated heat-aging tests for the distribution transformers, it has been demonstrated that the dissipation factor of the alkylbenzene blended paraffinic oil increases less than that of the pure one along with the aging period, and that this tendency is definitely delineated by the aid of the relationship between the dissipation factor and the neutralization value of the oil specimens. Thus, it has been concluded-that the alkylbenzene blended paraffinic oil is considered an transformer oil equivalent to an actually used, naphthenic mineral oil.","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121881916","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
Adhesion properties of different rotor pole wires 不同转子极线的粘附性能
1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470875
P. Silverberg
{"title":"Adhesion properties of different rotor pole wires","authors":"P. Silverberg","doi":"10.1109/ICEI.1980.7470875","DOIUrl":"https://doi.org/10.1109/ICEI.1980.7470875","url":null,"abstract":"A study was conducted to compare the effect on the turn-to-turn adhesion of double daglass plus heavy enamel square wire to that of single daglass plus heavy enamel square wire. Comparisons were made with two adhesives — a high strength Class H epoxy and a medium-strength Class F polyester. Test samples were made for shear, flexural and tensile strength. Only the shear data had any significance. A typical shear sample was a 2 wire by 3 wire rectangle 3 inches long of #5 square wire. The compressive force measured was that to push the center 2 wires out of the array at an elevated temperature of 180°C. A Lucas Tester at .200 in./min. was used. The elevated temperature is a simulation of the actual maximum operational regime of a wire-wound field coil. The samples were aged for 2499 hours at 220°C which is approximately equivalent to 30,000 hours at 180°C and 170,000 hours at 155°C. It was found that with polyester the sdg-he insulation was considerably stronger than ddg-he material. With epoxy the wire insulations showed rough equality while continuously gaining in strength. sdg-he insulation was adopted as the standard pole wire.","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127018310","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
Drift diffusion unipolar conduction 漂移扩散单极传导
1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470900
M. Zahn
{"title":"Drift diffusion unipolar conduction","authors":"M. Zahn","doi":"10.1109/ICEI.1980.7470900","DOIUrl":"https://doi.org/10.1109/ICEI.1980.7470900","url":null,"abstract":"Closed form steady state solutions are developed for one dimensional unipolar drift-diffusion conduction between parallel plate electrodes. Under time varying conditions, a mathematical transformation converts the governing non-linear partial differential equation to a linear but non-homogeneous diffusion equation. Typical steady state and transient electric field and charge density distributions are plotted for various boundary conditions.","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123387666","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 performance of CGI cables for EHV transmission at 550 and 800 kV 550和800千伏超高压用CGI电缆的介电性能
1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470873
C. Vincent, N. Trinh, F. Rizk
{"title":"Dielectric performance of CGI cables for EHV transmission at 550 and 800 kV","authors":"C. Vincent, N. Trinh, F. Rizk","doi":"10.1109/ICEI.1980.7470873","DOIUrl":"https://doi.org/10.1109/ICEI.1980.7470873","url":null,"abstract":"This paper presents the results of dielectric and power tests on practical CGI cables operating at 550 and 800 kV. These results indicate that typical CGI cable designs fulfill or even exceed the test specifications at operating pressure. They also suggest that optimization of the spacer performance could help to reduce the overall cable dimensions.","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133102114","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
Pulse height analysis of corona signals as a reliability tool for airborne high voltage components 电晕信号脉冲高度分析作为机载高压元件可靠性工具
1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470903
R. D. Parker
{"title":"Pulse height analysis of corona signals as a reliability tool for airborne high voltage components","authors":"R. D. Parker","doi":"10.1109/ICEI.1980.7470903","DOIUrl":"https://doi.org/10.1109/ICEI.1980.7470903","url":null,"abstract":"Use of corona pulse-height analysis as a routine test to determine high-voltage component reliability is discussed. Insulation type, component construction, environmental stress, and electric stress determine the type of test and its placement in the acceptance test sequence. Test equipment is described, and detailed specifications and test results are given for typical components.","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"51 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120837143","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
Maximum electric strength and vapor pressure of dielectric gases and mixtures 介电气体和混合物的最大电强度和蒸气压
1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470868
R. Wootton, M. R. Kegelman
{"title":"Maximum electric strength and vapor pressure of dielectric gases and mixtures","authors":"R. Wootton, M. R. Kegelman","doi":"10.1109/ICEI.1980.7470868","DOIUrl":"https://doi.org/10.1109/ICEI.1980.7470868","url":null,"abstract":"In general, there is a positive correlation between the electric breakdown strength of strong dielectric gases and their boiling points, and this relationship has been a factor inhibiting the use of alternatives to SF6 in compressed-gas-insulated equipment operating over a wide range of temperature. It was suggested many years ago that it might be advantageous to use some of these gases in mixtures rather than alone, and hence to find a mixture superior to SF6 in cost, electric strength, low-temperature performance or immunity to particle or electrode surface roughness effects. This paper notes that in general the saturated vapor pressure of a mixture of gases is less than the sum of the saturated vapor pressure of the component gases; and the deficiency is large if the range of boiling points of the component gases is large. The physical basis of this effect is discussed, and we calculate the range of compositions of a number of binary and ternary SF6 mixtures at 0.44 MPa and 25°C which also do not exhibit condensation at 0°C, or at −30°C. We have also measured and reported here 60 Hz breakdown strengths of these limiting and other mixtures. This work was performed at the Westinghouse Research and Development Center and the DuPont Experimental Station under a Research Contract 847-1 with the Electric Power Research Institute, \"Gases Superior to SF6 for Insulation and Interruption\".","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"6 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129426163","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
Bulk charging of epoxy insulation under DC stress 直流应力下环氧绝缘的大量充装
1980 IEEE International Conference on Electrical Insulation Pub Date : 1980-06-09 DOI: 10.1109/ICEI.1980.7470896
C. W. Mangelsdorf, C. Cooke
{"title":"Bulk charging of epoxy insulation under DC stress","authors":"C. W. Mangelsdorf, C. Cooke","doi":"10.1109/ICEI.1980.7470896","DOIUrl":"https://doi.org/10.1109/ICEI.1980.7470896","url":null,"abstract":"Stress enhancement due to the migration of charges can be a critical factor in the design of solid insulation for high voltage DC systems. The effect of bulk currents on surface and internal charge accumulation is discussed; and equations are formulated which predict steady-state conditions in arbitrary configurations o Experimental evidence is given for the validity of this analysis in epoxy insulators.","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128725329","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: 55
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