{"title":"Power distribution system design for operation under nonsinusoidal load conditions","authors":"G. W. Massey","doi":"10.1109/REPCON.1994.326249","DOIUrl":"https://doi.org/10.1109/REPCON.1994.326249","url":null,"abstract":"This paper explores the effects of power system harmonics induced by nonsinusoidal loads on power distribution systems. The first portion examines the harmonic phenomenon to more fully understand harmonic current behavior from an intuitive point of view. The second portion outlines the hazardous effect harmonic currents have on power system components and provides guidance for nonsinusoidal load power distribution system design.<<ETX>>","PeriodicalId":182639,"journal":{"name":"Proceedings of 1994 IEEE Rural Electric Power Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123914090","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}
{"title":"Distribution feeder line models","authors":"W. Kersting, W. H. Phillips","doi":"10.1109/REPCON.1994.326257","DOIUrl":"https://doi.org/10.1109/REPCON.1994.326257","url":null,"abstract":"Starting with a modified version of Carson's equations, this paper develops distribution feeder models that can be used in power flow and short circuit analysis of unbalanced three-phase distribution feeders. A simple line section is used to demonstrate the differences in voltage drops that occur between the various models for load conditions varying from balanced to very unbalanced.<<ETX>>","PeriodicalId":182639,"journal":{"name":"Proceedings of 1994 IEEE Rural Electric Power Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124454956","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}
{"title":"Enhanced sectionalizing through proper testing of recloser time current curves","authors":"L. Toth, A. Hannah","doi":"10.1109/REPCON.1994.326253","DOIUrl":"https://doi.org/10.1109/REPCON.1994.326253","url":null,"abstract":"The recent proliferation of software packages containing computer generated time-current curves have helped to free distribution engineers from curve-tracing using transparencies on electric light tables. The new software packages offer speed, flexibility, and ease of operation that enable the distribution engineer to provide enhanced sectionalizing for radial distribution systems. Single phase hydraulic oil circuit reclosers usually comprise a large portion of rural distribution systems and hence, represent a huge percentage of the total sectionalizing scheme. Unfortunately rebuilt oil circuit reclosers do not always exhibit time-current characteristics as depicted on computer generated or manual light tables. This paper summarizes considerations for proper recloser-recloser and recloser-fuse coordination. The paper also presents an approach and method of testing time-current characteristics of single phase hydraulic reclosers with oil or vacuum interrupters. Computer light table software is used to confirm if the \"as-tested\" time-current characteristics fall within specified tolerance limits.<<ETX>>","PeriodicalId":182639,"journal":{"name":"Proceedings of 1994 IEEE Rural Electric Power Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133891783","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}
{"title":"Guidelines for doing a telecommunications audit","authors":"J. Tary","doi":"10.1109/REPCON.1994.326266","DOIUrl":"https://doi.org/10.1109/REPCON.1994.326266","url":null,"abstract":"A well planned and operational telecommunications system can enhance a company's efficiency and reduce operating costs. The transfer of information by means of telecommunications is a basic requirement of doing business. First a benchmark is needed to establish how well the present communication system is performing and if any shortcomings exist. The actual discussion of the telecommunications audit covers these points: visual inspection; estimate of reliability; amount of traffic; quality of the circuits; system; interconnection; power systems; backup and summary. The workforce is critically dependent on receiving, modifying, generating and distributing information. The transfer of this information should be error free. With a careful telecommunication audit of the current system this goal of error free dependable transfer of information can be accomplished.<<ETX>>","PeriodicalId":182639,"journal":{"name":"Proceedings of 1994 IEEE Rural Electric Power Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129055034","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}
{"title":"Automated outage reporting: operational response or customer service?","authors":"E. Gardner","doi":"10.1109/REPCON.1994.326247","DOIUrl":"https://doi.org/10.1109/REPCON.1994.326247","url":null,"abstract":"Until recently, utility power outages have been reported by angry customers over the telephone. Modern distribution automation systems have addressed this inconvenience by providing an automatic \"power out\" message. These devices report even though the local power lines may be severed and then reports back to the utility as soon as power has been restored. By correlating both the \"power out\" and the \"power restored\" messages within the power outage system, utility operating crews can coordinate their efforts to the needs of their system without spending an inordinate amount of time tracing down each tap to insure that there were not multiple trouble spots along the same feeder. After realizing the operational benefits of pinpointing outages and managing the restoration effort, the same system can be deployed universally to all utility customers that are willing to pay a nominal monthly fee for this premium service.<<ETX>>","PeriodicalId":182639,"journal":{"name":"Proceedings of 1994 IEEE Rural Electric Power Conference","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133082932","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}
{"title":"A practical approach in substation capacitor bank applications to calculating, limiting, and reducing the effects of transient currents","authors":"L. M. Smith, Transient Currents, L. M. Smith","doi":"10.1109/REPCON.1994.326250","DOIUrl":"https://doi.org/10.1109/REPCON.1994.326250","url":null,"abstract":"When two or more capacitor banks are paralleled on a common bus, the back-to-back switching of a bank against one or more already energized banks can produce high peak transient in-rush current values. Typically, these currents can exceed the available fault current levels previously present at the bus. The presence of inductance and capacitance together makes the transients oscillatory. Because of close circuit coupling, the transient frequency is generally several kHz or higher and usually decays to zero in a fraction of a 60 Hz cycle. The relatively high level and short duration of these currents can damage substation and control equipment necessitating that appropriate precautions be taken during the design process. This paper explores the methods for estimating capacitor bank transient currents, based on ANSI/IEEE C37.012-1979, for various sizes, voltages, and configurations of real world capacitor bank installations. Also discussed are the various accepted and applied methods for limiting substation equipment susceptibility to transients, as well as reducing the magnitude of the transients themselves.<<ETX>>","PeriodicalId":182639,"journal":{"name":"Proceedings of 1994 IEEE Rural Electric Power Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121541682","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}
{"title":"Load building versus conservation as demand-side management objectives","authors":"D. T. Kexel","doi":"10.1109/REPCON.1994.326254","DOIUrl":"https://doi.org/10.1109/REPCON.1994.326254","url":null,"abstract":"This paper examines the economics of load building versus conservation as demand-side management objectives. Economic criteria to be used in evaluating each type of program from the perspectives of all impacted parties are provided. The impact of DSM programs on electric rates is shown to be a key focal point of a thorough evaluation.<<ETX>>","PeriodicalId":182639,"journal":{"name":"Proceedings of 1994 IEEE Rural Electric Power Conference","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134374606","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}
{"title":"Some factors to consider when determining loading levels for substation transformers","authors":"G. F. Reid","doi":"10.1109/REPCON.1994.326256","DOIUrl":"https://doi.org/10.1109/REPCON.1994.326256","url":null,"abstract":"Several factors that should be considered when setting loading limits for substation transformers are presented and discussed. When properly evaluated and applied to individual substations they should result in better utilization and longer life expectancy for these transformers.<<ETX>>","PeriodicalId":182639,"journal":{"name":"Proceedings of 1994 IEEE Rural Electric Power Conference","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122715015","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}