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Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference最新文献

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Application of isolation transformers for paper machine drives 隔离变压器在纸机传动中的应用
Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference Pub Date : 1988-06-06 DOI: 10.1109/PAPCON.1988.10917
R. Derrick
{"title":"Application of isolation transformers for paper machine drives","authors":"R. Derrick","doi":"10.1109/PAPCON.1988.10917","DOIUrl":"https://doi.org/10.1109/PAPCON.1988.10917","url":null,"abstract":"Application guidelines are presented regarding the proper application of isolation transformers on solid-state paper-machine drive systems. After discussing proper transformer-rating selection, the eleven guidelines are given without full academic proof but with the belief that they are practical and generally conservative. These rating and application guidelines are for DC sectional paper-machine drives, although most of the suggestions are applicable to DC winder drives, and many are also applicable to AC sectional paper-machine drives.<<ETX>>","PeriodicalId":254957,"journal":{"name":"Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116856868","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
Retrofit of a recovery boiler ID fan with a dual channel high reliability LCI drive 采用双通道高可靠性LCI驱动的回收锅炉ID风机改造
Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference Pub Date : 1988-06-06 DOI: 10.1109/PAPCON.1988.10897
J. Poole, W.J. Frey
{"title":"Retrofit of a recovery boiler ID fan with a dual channel high reliability LCI drive","authors":"J. Poole, W.J. Frey","doi":"10.1109/PAPCON.1988.10897","DOIUrl":"https://doi.org/10.1109/PAPCON.1988.10897","url":null,"abstract":"A dual-channel load-commutating inverter (LCI) drive and synchronous motor was applied, as a retrofit, to drive an existing induced-draft fan on a 1200 ton recovery boiler at Union Camp Corporation's paper mill located in Franklin, Virginia. The fan was originally driven by a steam turbine. For reliability, two channels of fully rated power-conversion equipment were provided. Parallel operation is the normal mode, with automatic transfer to the unfaulted channel when a fault occurs in the channel selected as the primary channel. The application and drive technology is described and discussed in detail. The economics approach and results that justified the retrofit are also described.<<ETX>>","PeriodicalId":254957,"journal":{"name":"Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125150840","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
Power system harmonic resonance: a documented case 电力系统谐波共振:一个记录案例
Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference Pub Date : 1988-06-06 DOI: 10.1109/PAPCON.1988.10898
G. Lemieux
{"title":"Power system harmonic resonance: a documented case","authors":"G. Lemieux","doi":"10.1109/PAPCON.1988.10898","DOIUrl":"https://doi.org/10.1109/PAPCON.1988.10898","url":null,"abstract":"Harmonic resonance occurs in a power system when the power system's natural frequency corresponds to the frequency of a source of harmonic current. A case of power system harmonic resonance which resulted in failure of 13.8 kV switchgear and consequential plant losses is documented. Calculations of the power system's natural frequencies are given for various power system configurations of supply reactance, motor reactance, and system-shunt capacitance. Sources of harmonic current are identified, methods of measuring harmonic current and voltage levels throughout the system are described, and results of the power system harmonic current and voltage survey are reported. The corrective action taken to prevent a recurrence of harmonic resonance is also described.<<ETX>>","PeriodicalId":254957,"journal":{"name":"Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129766962","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: 56
Reclassification of askarel transformers-field applications and results askarel变压器的重新分类——现场应用与结果
Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference Pub Date : 1988-06-06 DOI: 10.1109/PAPCON.1988.10906
M. D. McMahon, B. Rian
{"title":"Reclassification of askarel transformers-field applications and results","authors":"M. D. McMahon, B. Rian","doi":"10.1109/PAPCON.1988.10906","DOIUrl":"https://doi.org/10.1109/PAPCON.1988.10906","url":null,"abstract":"In 1986, the Westinghouse Electric Corporation introduced a PCB reconditioning process which guarantees quick reclassification of askarel-filled transformers to non-PCB status (below 50 p.p.m.) and with only two short power interruptions. The proprietary process used is functionally described, along with the test program used, and field results. In particular, two years of successful non-PCB operation of specific transformers is briefly outlined.<<ETX>>","PeriodicalId":254957,"journal":{"name":"Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124315050","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
Industrial control system by radio requires no license 无线电工业控制系统不需要许可证
Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference Pub Date : 1988-06-06 DOI: 10.1109/PAPCON.1988.10899
J. Lawrence
{"title":"Industrial control system by radio requires no license","authors":"J. Lawrence","doi":"10.1109/PAPCON.1988.10899","DOIUrl":"https://doi.org/10.1109/PAPCON.1988.10899","url":null,"abstract":"Radio is a reliable way to control equipment that is remotely located from a paper mill. Control points located within a small radius of the plant can be accessed with low-power transmitters. The basics of designing and certifying such a system are discussed. Transmitter/receiver specifications, industrial control applications, and system networking are covered.<<ETX>>","PeriodicalId":254957,"journal":{"name":"Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference","volume":"207 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124659190","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
Application of isolation transformers for paper machine DC drives-a service perspective 隔离变压器在纸机直流驱动中的应用——服务展望
Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference Pub Date : 1988-06-06 DOI: 10.1109/PAPCON.1988.10918
R. Jones
{"title":"Application of isolation transformers for paper machine DC drives-a service perspective","authors":"R. Jones","doi":"10.1109/PAPCON.1988.10918","DOIUrl":"https://doi.org/10.1109/PAPCON.1988.10918","url":null,"abstract":"Summary form only given. Personal experience related to multiple paper-machine sectional drives grouped on one isolation transformer are presented. It is argued that, in such cases, from a service viewpoint, isolation transformers should be applied individually to every DC drive. This supplies the maximum isolation for the drive from interference caused by another drive. Based on experience, drives rated higher than 50 kW perform satisfactorily when grouped on isolation transformers. Armature-reversing DC drives with a maximum capacity rating of less than 50 kW perform much better with their own isolation. The author's experience has shown that the problem is related more to the drive rating than the motor size. Individual isolation is required for small drives.<<ETX>>","PeriodicalId":254957,"journal":{"name":"Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114874227","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
Future applications of superconductors for industrial use 超导体在工业上的未来应用
Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference Pub Date : 1988-06-06 DOI: 10.1109/PAPCON.1988.10912
S.P. Reddy
{"title":"Future applications of superconductors for industrial use","authors":"S.P. Reddy","doi":"10.1109/PAPCON.1988.10912","DOIUrl":"https://doi.org/10.1109/PAPCON.1988.10912","url":null,"abstract":"The power distribution and utilization in a typical industry is compared to that of a hypothetical system using newly discovered high-temperature superconductors. Brief discussions of various machines with superconductors at ambient temperatures, based on developments made so far on large superconducting machines, for potential industrial applications, are included.<<ETX>>","PeriodicalId":254957,"journal":{"name":"Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123816415","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
Protective relaying for multisource generator buses 多源发电机母线保护继电器
Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference Pub Date : 1988-06-06 DOI: 10.1109/PAPCON.1988.10894
R. H. Simpson
{"title":"Protective relaying for multisource generator buses","authors":"R. H. Simpson","doi":"10.1109/PAPCON.1988.10894","DOIUrl":"https://doi.org/10.1109/PAPCON.1988.10894","url":null,"abstract":"A protective-relay application scheme is presented that uses devices widely used in pulp and paper mill power distribution systems. The effective use of summation overcurrent and directional overcurrent relays for multisource generator buses allows the power system protection engineer to achieve a good selective operation between source buses for both phase and ground fault current conditions. This greatly enhances the reliability of the power distribution system.<<ETX>>","PeriodicalId":254957,"journal":{"name":"Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114856283","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
Maximum transmission distance for RS-232 computer cables RS-232计算机电缆的最大传输距离
Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference Pub Date : 1988-06-06 DOI: 10.1109/PAPCON.1988.10907
B. Carlson
{"title":"Maximum transmission distance for RS-232 computer cables","authors":"B. Carlson","doi":"10.1109/PAPCON.1988.10907","DOIUrl":"https://doi.org/10.1109/PAPCON.1988.10907","url":null,"abstract":"Results of a study to establish guidelines for maximum cable lengths in a variety of typical RS-232 applications are presented. Even when worst-case conditions and 20% safety factors are included, the study indicates that cable lengths can often be used which are much longer than those suggested by the EIA standard. Maximum utilization guidelines are recommended for all systems running at partial utilization. Cable length is dependent on the cable capacitance and crosstalk, and on the driver and receiver electronics. Cable lengths are decreased if the system is subjected to external noise or ground loops. Because of the negative impact of external noise, shielded cable is recommended in most RS-232 applications.<<ETX>>","PeriodicalId":254957,"journal":{"name":"Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128083129","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
High voltage testing of medium voltage shielded power cables 中压屏蔽电力电缆的高压试验
Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference Pub Date : 1988-06-06 DOI: 10.1109/PAPCON.1988.10915
L. J. Kelly
{"title":"High voltage testing of medium voltage shielded power cables","authors":"L. J. Kelly","doi":"10.1109/PAPCON.1988.10915","DOIUrl":"https://doi.org/10.1109/PAPCON.1988.10915","url":null,"abstract":"An overview is given of several test procedures used for high-voltage testing of medium-voltage (2001-3500 V) shielded power cables. After a brief review of various medium-voltage cable constructions and standards, the author describes AC and DC withstand testing for different insulation thickness, partial discharge testing, field testing of cables (at the time of initial installation), as well as factors affecting leakage currents, and maintenance and proof testing.<<ETX>>","PeriodicalId":254957,"journal":{"name":"Conference Record of 1988 Annual Pulp and Paper Industry Technical Conference","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132374687","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
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