Pub Date : 1992-05-03DOI: 10.1109/REPCON.1992.178933
J. B. Franklin
The author discusses the issues involved with the interfacing of distribution automation (DA) equipment and the normal distribution system protection equipment. Distribution automation involves many different forms of automating the operating of a distribution system. Most utilize microprocessor-based equipment which have software and the necessary hardware interfaces to implement operating decisions. Some of the details of these hardware interfaces and the philosophy behind these interfaces are considered. Practical aspects of interfacing DA equipment to specific protection requirements are discussed.<>
{"title":"Interfacing distribution automation and system protection","authors":"J. B. Franklin","doi":"10.1109/REPCON.1992.178933","DOIUrl":"https://doi.org/10.1109/REPCON.1992.178933","url":null,"abstract":"The author discusses the issues involved with the interfacing of distribution automation (DA) equipment and the normal distribution system protection equipment. Distribution automation involves many different forms of automating the operating of a distribution system. Most utilize microprocessor-based equipment which have software and the necessary hardware interfaces to implement operating decisions. Some of the details of these hardware interfaces and the philosophy behind these interfaces are considered. Practical aspects of interfacing DA equipment to specific protection requirements are discussed.<<ETX>>","PeriodicalId":366297,"journal":{"name":"[Proceedings] 1992 Rural Electric Power Conference. Papers presented at the 36th Annual Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124696198","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}
Pub Date : 1992-05-03DOI: 10.1109/REPCON.1992.178926
M. Schepers
The author describes a means to quickly determine the tension or uplift force on the anchor, the tension in the guy, the compression reaction in the guy strut, the bending moment in the pole, the axial compression load on the pole, and bearing load on the soil. Also included are allowable loads for commonly used pipe struts, guy strand, pole classes, and soil strengths for a range of soil properties.<>
{"title":"Application of sidewalk guys (power line poles)","authors":"M. Schepers","doi":"10.1109/REPCON.1992.178926","DOIUrl":"https://doi.org/10.1109/REPCON.1992.178926","url":null,"abstract":"The author describes a means to quickly determine the tension or uplift force on the anchor, the tension in the guy, the compression reaction in the guy strut, the bending moment in the pole, the axial compression load on the pole, and bearing load on the soil. Also included are allowable loads for commonly used pipe struts, guy strand, pole classes, and soil strengths for a range of soil properties.<<ETX>>","PeriodicalId":366297,"journal":{"name":"[Proceedings] 1992 Rural Electric Power Conference. Papers presented at the 36th Annual Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123969695","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}
Pub Date : 1992-05-03DOI: 10.1109/REPCON.1992.178938
P. Enjeti, S. A. Choudhury
A low-cost single-phase-to-three-phase converter using only two power semiconductor switches is presented. The circuit complexity of the topology is minimal, and, with the use of advanced pulse width modulation (PWM) techniques, high-quality balanced three-phase output voltages are guaranteed. A unique advantage of the proposed system is that the static converter kVA rating is only 50% of the three-phase output kVA. Analysis and simulation results are presented to show the high-performance features of the proposed converter. Design procedures for selecting the reactive components are also discussed. Selected results were verified experimentally on a laboratory prototype converter powering a three-phase induction motor.<>
{"title":"A low cost single phase to three phase static power converter","authors":"P. Enjeti, S. A. Choudhury","doi":"10.1109/REPCON.1992.178938","DOIUrl":"https://doi.org/10.1109/REPCON.1992.178938","url":null,"abstract":"A low-cost single-phase-to-three-phase converter using only two power semiconductor switches is presented. The circuit complexity of the topology is minimal, and, with the use of advanced pulse width modulation (PWM) techniques, high-quality balanced three-phase output voltages are guaranteed. A unique advantage of the proposed system is that the static converter kVA rating is only 50% of the three-phase output kVA. Analysis and simulation results are presented to show the high-performance features of the proposed converter. Design procedures for selecting the reactive components are also discussed. Selected results were verified experimentally on a laboratory prototype converter powering a three-phase induction motor.<<ETX>>","PeriodicalId":366297,"journal":{"name":"[Proceedings] 1992 Rural Electric Power Conference. Papers presented at the 36th Annual Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116900916","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}
Pub Date : 1992-05-03DOI: 10.1109/REPCON.1992.178939
A. Girgis, C. Fallon, J. Rubino, R.C. Catoe
The authors present a study of the steady-state and transient effects of power factor correction capacitors on the utility and on the customer. The addition of a power factor correction capacitor in the presence of downstream harmonic loads and at the harmonic load site is considered. In both cases the resonance created by the addition of the capacitor caused the harmonic distortion of the voltage and current waveforms to increase. Another problem is transient overvoltages created by switching the capacitor. The steady-state concerns associated with the application of power factor correction capacitors in the presence of harmonic loads and unbalance are addressed. The transient problems associated with the switching of power factor correction capacitors are considered.<>
{"title":"Harmonics and transient overvoltages due to capacitor switching","authors":"A. Girgis, C. Fallon, J. Rubino, R.C. Catoe","doi":"10.1109/REPCON.1992.178939","DOIUrl":"https://doi.org/10.1109/REPCON.1992.178939","url":null,"abstract":"The authors present a study of the steady-state and transient effects of power factor correction capacitors on the utility and on the customer. The addition of a power factor correction capacitor in the presence of downstream harmonic loads and at the harmonic load site is considered. In both cases the resonance created by the addition of the capacitor caused the harmonic distortion of the voltage and current waveforms to increase. Another problem is transient overvoltages created by switching the capacitor. The steady-state concerns associated with the application of power factor correction capacitors in the presence of harmonic loads and unbalance are addressed. The transient problems associated with the switching of power factor correction capacitors are considered.<<ETX>>","PeriodicalId":366297,"journal":{"name":"[Proceedings] 1992 Rural Electric Power Conference. Papers presented at the 36th Annual Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131513232","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}
Pub Date : 1992-05-03DOI: 10.1109/REPCON.1992.178940
E. Makram, E.V. Subramaniam, A. Girgis, L. Morgan, R. Catoe
The authors present a study of harmonic filter design to minimize harmonic distortion caused by a harmonic source such as drives. Several types of shunt harmonic filters are presented. The analysis includes the basic principles, the application of the Z-bus method, and the economic aspects for harmonic filter design. Offline steady-state simulation programs were used to model loads, to study variation of the harmonics, and to evaluate the effect of harmonic filters at various buses in the system. The performance of each filter design was tested using data recorded in local utility systems. A method of reducing resonance that may occur due to the presence of the filter is also suggested. The transient analysis of harmonic filters using the electromagnetic transients program (EMTP) is reported.<>
{"title":"Harmonic filter design using actual recorded data","authors":"E. Makram, E.V. Subramaniam, A. Girgis, L. Morgan, R. Catoe","doi":"10.1109/REPCON.1992.178940","DOIUrl":"https://doi.org/10.1109/REPCON.1992.178940","url":null,"abstract":"The authors present a study of harmonic filter design to minimize harmonic distortion caused by a harmonic source such as drives. Several types of shunt harmonic filters are presented. The analysis includes the basic principles, the application of the Z-bus method, and the economic aspects for harmonic filter design. Offline steady-state simulation programs were used to model loads, to study variation of the harmonics, and to evaluate the effect of harmonic filters at various buses in the system. The performance of each filter design was tested using data recorded in local utility systems. A method of reducing resonance that may occur due to the presence of the filter is also suggested. The transient analysis of harmonic filters using the electromagnetic transients program (EMTP) is reported.<<ETX>>","PeriodicalId":366297,"journal":{"name":"[Proceedings] 1992 Rural Electric Power Conference. Papers presented at the 36th Annual Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129531999","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}
Pub Date : 1900-01-01DOI: 10.1109/REPCON.1992.178941
A. Albright
The author discusses what to look for when purchasing a high-quality, reliable uninterruptible power supply (UPS) for critical applications. Types of UPS systems are defined, as is the importance of UPS components, including connectors, magnetics, electronic components, and wire. The right manufacturer can be determined by examining its history, quality control program, purchasing practices and methods of manufacture.<>
{"title":"UPS systems for critical applications","authors":"A. Albright","doi":"10.1109/REPCON.1992.178941","DOIUrl":"https://doi.org/10.1109/REPCON.1992.178941","url":null,"abstract":"The author discusses what to look for when purchasing a high-quality, reliable uninterruptible power supply (UPS) for critical applications. Types of UPS systems are defined, as is the importance of UPS components, including connectors, magnetics, electronic components, and wire. The right manufacturer can be determined by examining its history, quality control program, purchasing practices and methods of manufacture.<<ETX>>","PeriodicalId":366297,"journal":{"name":"[Proceedings] 1992 Rural Electric Power Conference. Papers presented at the 36th Annual Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127188150","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}
Pub Date : 1900-01-01DOI: 10.1109/REPCON.1992.178937
A. C. Hammond
A survey research analysis of 255 electric distribution cooperative general managers across the United States is discussed. The managers were asked to answer a 28-question survey regarding demographics characterizing their cooperative and themselves. They were also asked to rate 30 issues on a scale from one to five as to their impact upon the future of the industry. After compiling the demographic data, analysis of variance testing was used to locate relationships between demographic intervals and the ratings of issues. The survey and its results are discussed.<>
{"title":"Cooperative managers identify our key industry issues","authors":"A. C. Hammond","doi":"10.1109/REPCON.1992.178937","DOIUrl":"https://doi.org/10.1109/REPCON.1992.178937","url":null,"abstract":"A survey research analysis of 255 electric distribution cooperative general managers across the United States is discussed. The managers were asked to answer a 28-question survey regarding demographics characterizing their cooperative and themselves. They were also asked to rate 30 issues on a scale from one to five as to their impact upon the future of the industry. After compiling the demographic data, analysis of variance testing was used to locate relationships between demographic intervals and the ratings of issues. The survey and its results are discussed.<<ETX>>","PeriodicalId":366297,"journal":{"name":"[Proceedings] 1992 Rural Electric Power Conference. Papers presented at the 36th Annual Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116339042","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}
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