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Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference最新文献

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Rock socketed drilled shaft and directly embedded pole tests 嵌岩钻杆和直埋杆试验
Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference Pub Date : 1991-09-22 DOI: 10.1109/TDC.1991.169600
L. Rojas-Gonzalez, A. DiGioia, P. Kandaris, R. E. Kondziolka
{"title":"Rock socketed drilled shaft and directly embedded pole tests","authors":"L. Rojas-Gonzalez, A. DiGioia, P. Kandaris, R. E. Kondziolka","doi":"10.1109/TDC.1991.169600","DOIUrl":"https://doi.org/10.1109/TDC.1991.169600","url":null,"abstract":"A major purpose of overhead transmission line design is to achieve a minimum cost for a given level of reliability and safety. The greatest uncertainty in this process is in foundation design. The Electric Power Research Institute (EPRI) has sponsored, since 1977, a comprehensive program of activities in foundation design. A recent activity involves performing well documented load tests of foundations partially or totally socketed in rock. As part of this activity four full-scale foundations were tested. All four foundations, two reinforced concrete drilled shafts and two directly embedded steel poles, were subject to high moment loads and modest shear and compression forces-loads which are characteristic of single pole transmission line structures. The load tests performed, data collected during the field exploration and laboratory testing, and predictions using the available analytical models are presented. Comparison of test results and model predictions indicates a need to refine presently available design methods.<<ETX>>","PeriodicalId":367010,"journal":{"name":"Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129977378","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
A method for constructing a reduced order transformer model for system studies from detailed lumped parameter models 从详细的集总参数模型构造系统研究的降阶变压器模型的方法
Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference Pub Date : 1991-09-22 DOI: 10.1109/TDC.1991.169555
R. Degeneff, M. Gutierrez, P. Mckenny
{"title":"A method for constructing a reduced order transformer model for system studies from detailed lumped parameter models","authors":"R. Degeneff, M. Gutierrez, P. Mckenny","doi":"10.1109/TDC.1991.169555","DOIUrl":"https://doi.org/10.1109/TDC.1991.169555","url":null,"abstract":"All power transformer manufacturers maintain computer programs that compute the internal transient voltage distribution when the transformer is subjected to transient voltages. This information is used to design the insulation structure for the transformer. Utility engineers also need to represent the power transformer in some detail in their system studies since significantly higher failure rates on large EHV units suggest the transient voltage that the system places on the terminals of the transformer is in some measure a function of the impedance characteristic of the transformer. A reduction technique is presented which uses the detailed lumped parameter transformer model as a starting point and allows its reduction to any size specified by the user. The method is straightforward mathematically and while retaining the physical configuration of the transformer does not require any proprietary information from the transformer suppliers. The necessary mathematics are presented, and the method is illustrated using a 500 MVA auto-transformer.<<ETX>>","PeriodicalId":367010,"journal":{"name":"Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130159088","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: 46
Calculation of valve damping circuit losses in 12-pulse HVDC converters 12脉冲高压直流变流器阀阻尼电路损耗计算
Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference Pub Date : 1991-09-22 DOI: 10.1109/TDC.1991.169592
S. B. Tennakoon, M. L. Woodhouse
{"title":"Calculation of valve damping circuit losses in 12-pulse HVDC converters","authors":"S. B. Tennakoon, M. L. Woodhouse","doi":"10.1109/TDC.1991.169592","DOIUrl":"https://doi.org/10.1109/TDC.1991.169592","url":null,"abstract":"The use of published equations for calculating damping circuit losses in a 12-pulse HVDC power converter relies on the assumption that the inductive coupling between the pair of 30 degrees phase-displaced 6-pulse converter groups is negligably small. However, there are instances where this coupling cannot be ignored. An analytical method is presented for the calculation of valve damping circuit losses of 12-pulse converters, taking the effects of inductive coupling into account. The extra commutation notches introduced to the valve voltage waveform are expressed in terms of a notch factor m, and a general equation for the valve damping circuit loss is derived. The equation is divided into two parts so that the effects of valve stray capacitance and multiple valve grading circuits can be accommodated in a logical manner. An additional component of loss arising from the thyristor stored charge phenomenon is also discussed.<<ETX>>","PeriodicalId":367010,"journal":{"name":"Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134004876","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
High coulomb lightning duty on distribution MOV blocks 配电MOV块的高库仑防雷负荷
Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference Pub Date : 1991-09-22 DOI: 10.1109/TDC.1991.169539
R. M. Reckard
{"title":"High coulomb lightning duty on distribution MOV blocks","authors":"R. M. Reckard","doi":"10.1109/TDC.1991.169539","DOIUrl":"https://doi.org/10.1109/TDC.1991.169539","url":null,"abstract":"Distribution arrester ZnO MOV blocks were tested with high coulomb one-half sine wave surge currents. Of the 180 tested, 156 were tested in circuits which delivered greater than 0.6 C. All these blocks were evaluated using the ANSI 20-shot 250/2mS LCLD test. A statistic based upon the ability to survive this test was used to evaluate the MOV block durability. This statistic predicts at about the 99% confidence level that there is only a 1% probability that the block will fail to pass the 20 shot 250/2mS LCLD test after discharging three 0.54 C lightning surges (independent of current level between 1 kA and 60 kA). Only one 0.54 C surge would be expected in 43 years in areas of North America where the discharge frequency is calculated to be 0.5. Well made ZnO MOV blocks have capability well in excess of this in that the statistic was developed for three repeated shots.<<ETX>>","PeriodicalId":367010,"journal":{"name":"Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134102719","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
Design and testing of a three-break 800 kV SF/sub 6/ circuit breaker with ZnO varistors for shunt reactor switching 并联电抗器开关用ZnO压敏电阻器三开断800 kV SF/sub /断路器的设计与试验
Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference Pub Date : 1991-09-22 DOI: 10.1109/TDC.1991.169551
A.K. McCabe, G. Seyrling, J. D. Mandeville, J.M. Willieme
{"title":"Design and testing of a three-break 800 kV SF/sub 6/ circuit breaker with ZnO varistors for shunt reactor switching","authors":"A.K. McCabe, G. Seyrling, J. D. Mandeville, J.M. Willieme","doi":"10.1109/TDC.1991.169551","DOIUrl":"https://doi.org/10.1109/TDC.1991.169551","url":null,"abstract":"Considerations in the design and testing of a three-break 800 kV SF/sub 6/ circuit breaker with ZnO varistors for shunt reactor switching are presented. Included are system and circuit breaker considerations, factory design and analysis, and a description of the field test circuit and instrumentation. Field test results are presented which verify the design and application.<<ETX>>","PeriodicalId":367010,"journal":{"name":"Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127399283","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
Aged ACSR conductors. II. Prediction of remaining life 老化ACSR导线。2。剩余寿命预测
Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference Pub Date : 1991-09-22 DOI: 10.1109/TDC.1991.169603
D. Havard, M. K. Bissada, C. Fajardo, D. Horrocks, J. Meale, J. Motlis, M. Tabatabai, K. S. Yoshiki-Gravelsins
{"title":"Aged ACSR conductors. II. Prediction of remaining life","authors":"D. Havard, M. K. Bissada, C. Fajardo, D. Horrocks, J. Meale, J. Motlis, M. Tabatabai, K. S. Yoshiki-Gravelsins","doi":"10.1109/TDC.1991.169603","DOIUrl":"https://doi.org/10.1109/TDC.1991.169603","url":null,"abstract":"For Pt.I, see ibid., pp.835-841 (1991). In Pt.I, methods of testing to determine the overall condition of Ontario Hydro's overhead conductors were described. The analysis of the test results relative to estimated end-of-life values is presented. The remaining useful life of conductors can be estimated from the curves of progressive degradation. Air pollution studies have led to an environmental corrosion index, which has been correlated with remaining life based on the torsional ductility of steel core wires. This had been used to map expected conductor life across the province. The average service life is found to vary between 67 and 77 years depending on the local contamination level.<<ETX>>","PeriodicalId":367010,"journal":{"name":"Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133814881","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
An alternative evaluation of distribution transformers to achieve the lowest TOC 实现最低TOC的配电变压器的替代评估
Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference Pub Date : 1991-09-22 DOI: 10.1109/TDC.1991.169561
J. Baranowski, P. Hopkinson
{"title":"An alternative evaluation of distribution transformers to achieve the lowest TOC","authors":"J. Baranowski, P. Hopkinson","doi":"10.1109/TDC.1991.169561","DOIUrl":"https://doi.org/10.1109/TDC.1991.169561","url":null,"abstract":"The 65 degrees C rise rating of a distribution transformer is a thermal life rating of its insulation system, not a best efficiency condition. Total owning cost (TOC) is referenced at 85 degrees C which is based on a 20 degrees C ambient plus a 65 degrees C rise. For better efficiency, a transformer should be operated at a lower temperature. Transformer design programs calculate a design for the lowest TOC at the 85 degrees C reference temperature. These programs do not calculate a design for the lowest possible temperature rise or lowest TOC regardless of reference temperature. As a consequence, the lowest TOC is not realized. A new evaluation method is proposed that will provide the user with a distribution transformer design which has a lower operating temperature rise thus improving both the transformer's efficiency and the customer's TOC.<<ETX>>","PeriodicalId":367010,"journal":{"name":"Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115799248","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: 16
Divergent evolution and resulting characteristics among the world's distribution systems 世界配电系统的分化演化及其特征
Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference Pub Date : 1991-09-22 DOI: 10.1109/TDC.1991.169578
J. Carr, L. V. McCall
{"title":"Divergent evolution and resulting characteristics among the world's distribution systems","authors":"J. Carr, L. V. McCall","doi":"10.1109/TDC.1991.169578","DOIUrl":"https://doi.org/10.1109/TDC.1991.169578","url":null,"abstract":"The factors which affect the evolution of world distribution systems are detailed. Their divergence, with implications for application in less developed countries, is discussed. The advantages of the North American and European style systems are described, while it is recognized that neither is intrinsically superior. The need for recognition of legitimate variances in distribution systems and their associated equipment, when developing relevant standards, is established.<<ETX>>","PeriodicalId":367010,"journal":{"name":"Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114747895","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: 30
Upgrading transmission lines 升级输电线路
Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference Pub Date : 1991-09-22 DOI: 10.1109/TDC.1991.169599
G. T. Hanson
{"title":"Upgrading transmission lines","authors":"G. T. Hanson","doi":"10.1109/TDC.1991.169599","DOIUrl":"https://doi.org/10.1109/TDC.1991.169599","url":null,"abstract":"An overview of a large utility's experience in upgrading transmission lines is presented. Included are discussions of the reasons and methods for upgrading. Also included are the advantages, disadvantages, and relative costs of upgrading versus constructing new transmission lines. The utility's experience is illustrated by describing four upgrading projects where voltage was increased. The first three projects have been completed and the fourth is under construction.<<ETX>>","PeriodicalId":367010,"journal":{"name":"Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114905415","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: 12
Application of two coat cathodic electrodeposition to pole mounted distribution transformers 两层阴极电沉积技术在极装配电变压器中的应用
Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference Pub Date : 1991-09-22 DOI: 10.1109/TDC.1991.169564
M. E. Todd
{"title":"Application of two coat cathodic electrodeposition to pole mounted distribution transformers","authors":"M. E. Todd","doi":"10.1109/TDC.1991.169564","DOIUrl":"https://doi.org/10.1109/TDC.1991.169564","url":null,"abstract":"The process of two coat cathodic electrodeposition is described in light of the benefits held in the application of this process to pole mounted distribution transformers. Due to the lack of an accepted pole mounted distribution transformer finishing performance standard, the pad mounted standard ANSI C57.12.28 was used as a benchmark for comparison. The results of performance testing of panels coated with two coat cathodic electrodeposition to the criteria of ANSI C57.12.28 are presented and compared to similar test results of two commonly used coating techniques. Recommendations are made for the application of two coat cathodic electrodeposition to hot rolled carbon steel where extended outdoor exposure is anticipated and complicated geometries are used in product fabrication.<<ETX>>","PeriodicalId":367010,"journal":{"name":"Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129856377","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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