Pub Date : 2002-06-17DOI: 10.1109/PAPCON.2002.1015145
B. Finke
This is an update of new US industry standards for insulated wire and cable by The Insulated Cable Engineers Association (ICEA)/National Electrical Manufacturers Association (NEMA). Also, changes by the Association of Edison Illuminating Companies (AEIC) to solid dielectric insulated cable specifications are presented. The applicable standards for power, control and in instrumentation cable typically used in industrial and utility applications, are reviewed.
{"title":"Changes in insulated cable standards","authors":"B. Finke","doi":"10.1109/PAPCON.2002.1015145","DOIUrl":"https://doi.org/10.1109/PAPCON.2002.1015145","url":null,"abstract":"This is an update of new US industry standards for insulated wire and cable by The Insulated Cable Engineers Association (ICEA)/National Electrical Manufacturers Association (NEMA). Also, changes by the Association of Edison Illuminating Companies (AEIC) to solid dielectric insulated cable specifications are presented. The applicable standards for power, control and in instrumentation cable typically used in industrial and utility applications, are reviewed.","PeriodicalId":295977,"journal":{"name":"Conference Record of the 2002 Annual Pulp and Paper Industry Technical Conference (Cat. No.02CH37352)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116758290","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 : 2002-06-17DOI: 10.1109/PAPCON.2002.1015126
M. Elsinga
A new thermo-mechanical pulp (TMP) mill refiner installation was optimized for quality parameters. The mill was state of the art and, despite having the most modern process equipment, was not able to meet the quality requirements without undergoing a deliberate optimization effort. The quality improvement results were not obtained from a single solution but by incremental changes and methodical testing. A variety of techniques were used to achieve the results in a timely and cost effective manner.
{"title":"TMP optimization using multivariate analysis [thermo-mechanical pulp mill]","authors":"M. Elsinga","doi":"10.1109/PAPCON.2002.1015126","DOIUrl":"https://doi.org/10.1109/PAPCON.2002.1015126","url":null,"abstract":"A new thermo-mechanical pulp (TMP) mill refiner installation was optimized for quality parameters. The mill was state of the art and, despite having the most modern process equipment, was not able to meet the quality requirements without undergoing a deliberate optimization effort. The quality improvement results were not obtained from a single solution but by incremental changes and methodical testing. A variety of techniques were used to achieve the results in a timely and cost effective manner.","PeriodicalId":295977,"journal":{"name":"Conference Record of the 2002 Annual Pulp and Paper Industry Technical Conference (Cat. No.02CH37352)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121905978","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 : 2002-06-17DOI: 10.1109/PAPCON.2002.1015132
C. Carr
The conversion of a lime kiln drive from analog DC to digital AC is examined in detail. The existing two-motor DC drive system suffered from old age and had a history of insufficient starting torque and extreme torque imbalance. The imbalance prematurely wore out the kiln ring gear, which required replacement. Alternatives such as DC drive retrofits, digital DC drives and hydraulic drives were higher in installed cost and required more maintenance. The AC drive was lowest in installed cost and offered tremendous advantages in simplicity, reliability, performance and the lowest maintenance. The new two-motor AC drive system was installed and tested before the original drive was taken out of service. Torque sharing between drives is coordinated through a dedicated communication link. The benefits of the conversion were impressive. Starting torque was increased, eliminating stall conditions, and enabling emergency single drive starts. Torque balance induced mechanical wear was eliminated. The speed control precision increased noticeably and maintenance was virtually eliminated. The DC drive to AC drive conversion outlined in this case study achieved excellent results in a cost-effective manner.
{"title":"A lime kiln drive from DC to AC","authors":"C. Carr","doi":"10.1109/PAPCON.2002.1015132","DOIUrl":"https://doi.org/10.1109/PAPCON.2002.1015132","url":null,"abstract":"The conversion of a lime kiln drive from analog DC to digital AC is examined in detail. The existing two-motor DC drive system suffered from old age and had a history of insufficient starting torque and extreme torque imbalance. The imbalance prematurely wore out the kiln ring gear, which required replacement. Alternatives such as DC drive retrofits, digital DC drives and hydraulic drives were higher in installed cost and required more maintenance. The AC drive was lowest in installed cost and offered tremendous advantages in simplicity, reliability, performance and the lowest maintenance. The new two-motor AC drive system was installed and tested before the original drive was taken out of service. Torque sharing between drives is coordinated through a dedicated communication link. The benefits of the conversion were impressive. Starting torque was increased, eliminating stall conditions, and enabling emergency single drive starts. Torque balance induced mechanical wear was eliminated. The speed control precision increased noticeably and maintenance was virtually eliminated. The DC drive to AC drive conversion outlined in this case study achieved excellent results in a cost-effective manner.","PeriodicalId":295977,"journal":{"name":"Conference Record of the 2002 Annual Pulp and Paper Industry Technical Conference (Cat. No.02CH37352)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129982453","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 : 2002-06-17DOI: 10.1109/PAPCON.2002.1015153
F. Nepveux
This paper is a case study of the application of the 67N function in a digital multifunction relay. The directional neutral current relay, function number 67N, is often found to be critical to the proper operation of a protective scheme. Furthermore, a false trip of a 67N will usually be devastating. The 67N is a complex function that always required more wiring than almost any other relay. The 67N is now available as one of many functions in digital multi-function relays. However, in the digital relay the 67N may be even more difficult to set and test than it was as a single function in an old electromechanical relay.
{"title":"Applying the directional neutral, 67N, function in microprocessor multifunction relays","authors":"F. Nepveux","doi":"10.1109/PAPCON.2002.1015153","DOIUrl":"https://doi.org/10.1109/PAPCON.2002.1015153","url":null,"abstract":"This paper is a case study of the application of the 67N function in a digital multifunction relay. The directional neutral current relay, function number 67N, is often found to be critical to the proper operation of a protective scheme. Furthermore, a false trip of a 67N will usually be devastating. The 67N is a complex function that always required more wiring than almost any other relay. The 67N is now available as one of many functions in digital multi-function relays. However, in the digital relay the 67N may be even more difficult to set and test than it was as a single function in an old electromechanical relay.","PeriodicalId":295977,"journal":{"name":"Conference Record of the 2002 Annual Pulp and Paper Industry Technical Conference (Cat. No.02CH37352)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129762686","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 : 2002-06-17DOI: 10.1109/MIA.2003.1245796
J. Malinowski, J. McCormick
This paper discusses the use of motor specifications and the resulting challenges presented to the motor manufacturer. Many motor specifications were written years ago and call for materials and processes that have been replaced or improved. The paper identifies "traditional" items that often appear on older specifications. Newer materials or devices that can provide better service or protection may represent a more standard part for the motor manufacturer. The goal is to add usable value and shorter delivery time to the customer while eliminating nonstandard practices or special parts.
{"title":"AC induction motor specifications-an update on currently available procedures and options","authors":"J. Malinowski, J. McCormick","doi":"10.1109/MIA.2003.1245796","DOIUrl":"https://doi.org/10.1109/MIA.2003.1245796","url":null,"abstract":"This paper discusses the use of motor specifications and the resulting challenges presented to the motor manufacturer. Many motor specifications were written years ago and call for materials and processes that have been replaced or improved. The paper identifies \"traditional\" items that often appear on older specifications. Newer materials or devices that can provide better service or protection may represent a more standard part for the motor manufacturer. The goal is to add usable value and shorter delivery time to the customer while eliminating nonstandard practices or special parts.","PeriodicalId":295977,"journal":{"name":"Conference Record of the 2002 Annual Pulp and Paper Industry Technical Conference (Cat. No.02CH37352)","volume":"31 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120941412","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 : 2002-06-17DOI: 10.1109/PAPCON.2002.1015128
P. Werner
Web tension transducing systems, implemented with a transducing roll (measuring beam) that incorporates only two load-bearing points (one at each end of the transport roll), are uncomplicated relative to conventions for establishing the per-transducer calibration standards and methods of calibration. Multiple (more than two) load-bearing point transducing rolls are not utilized to enhance web tension transduction. As indicated above, the simple two point system is both simple and accurate. However, as web processing machines become faster and wider, and web transport tension control more critical, multiple load-bearing point web transport roll systems have become quite common. When web tension transducing systems are implemented with web transport rolls, which have more than two load-bearing points, variations relative to the conventions for establishing per-transducer calibration standards and methods of calibration result in confusion, and in many cases subsequent web tension transducing errors. This paper discusses the issues involved and provides the basis for the development of compensation factors that could be applied to particular tension transducing configurations.
{"title":"Calibration of segmented tension roll transducing systems","authors":"P. Werner","doi":"10.1109/PAPCON.2002.1015128","DOIUrl":"https://doi.org/10.1109/PAPCON.2002.1015128","url":null,"abstract":"Web tension transducing systems, implemented with a transducing roll (measuring beam) that incorporates only two load-bearing points (one at each end of the transport roll), are uncomplicated relative to conventions for establishing the per-transducer calibration standards and methods of calibration. Multiple (more than two) load-bearing point transducing rolls are not utilized to enhance web tension transduction. As indicated above, the simple two point system is both simple and accurate. However, as web processing machines become faster and wider, and web transport tension control more critical, multiple load-bearing point web transport roll systems have become quite common. When web tension transducing systems are implemented with web transport rolls, which have more than two load-bearing points, variations relative to the conventions for establishing per-transducer calibration standards and methods of calibration result in confusion, and in many cases subsequent web tension transducing errors. This paper discusses the issues involved and provides the basis for the development of compensation factors that could be applied to particular tension transducing configurations.","PeriodicalId":295977,"journal":{"name":"Conference Record of the 2002 Annual Pulp and Paper Industry Technical Conference (Cat. No.02CH37352)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126840492","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 : 2002-06-17DOI: 10.1109/PAPCON.2002.1015137
J.A. Estes, R. Schaefer
Increases in power demand continue to burden power suppliers. Efficiency, reliability, improved control and uptime are key words to describe power production needs in today's power starved industry. Many operating power plants utilize excitation systems dating back to the 1960s and 1970s, using the original OEM-provided equipment. Such excitation systems are either obsolete or difficult to maintain in operating power plants today. These excitation systems are common on utility, industrial, and municipal steam and gas turbine generators. Each of these obsolete excitation systems represented a unique control design that today can be upgraded to a modern digital control excitation system. New "digitally" controlled systems will streamline the unit startup, improve the generator response, provide better monitoring and protection to the generating system, and make the Operator's job easier. This paper reviews a specific excitation system retrofit of the SCT-PPT (saturable current transformer/power potential transformer) static excitation system and the various factors involving a rehabilitation project that includes new equipment, design interface, installation, and commissioning. A successful retrofit project begins with proper planning to ensure that the new installation meets the schedule and on-time commitment for power production.
{"title":"Retrofitting SCT-PPT excitation systems with digital control","authors":"J.A. Estes, R. Schaefer","doi":"10.1109/PAPCON.2002.1015137","DOIUrl":"https://doi.org/10.1109/PAPCON.2002.1015137","url":null,"abstract":"Increases in power demand continue to burden power suppliers. Efficiency, reliability, improved control and uptime are key words to describe power production needs in today's power starved industry. Many operating power plants utilize excitation systems dating back to the 1960s and 1970s, using the original OEM-provided equipment. Such excitation systems are either obsolete or difficult to maintain in operating power plants today. These excitation systems are common on utility, industrial, and municipal steam and gas turbine generators. Each of these obsolete excitation systems represented a unique control design that today can be upgraded to a modern digital control excitation system. New \"digitally\" controlled systems will streamline the unit startup, improve the generator response, provide better monitoring and protection to the generating system, and make the Operator's job easier. This paper reviews a specific excitation system retrofit of the SCT-PPT (saturable current transformer/power potential transformer) static excitation system and the various factors involving a rehabilitation project that includes new equipment, design interface, installation, and commissioning. A successful retrofit project begins with proper planning to ensure that the new installation meets the schedule and on-time commitment for power production.","PeriodicalId":295977,"journal":{"name":"Conference Record of the 2002 Annual Pulp and Paper Industry Technical Conference (Cat. No.02CH37352)","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134446279","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 : 2002-06-17DOI: 10.1109/PAPCON.2002.1015139
T. Albers, A. Bonnett
This paper reviews the motor temperature operating consideration for totally enclosed fan cooled (TEFC), open dripproof (ODP) and weather protected II (WP-II) type of motor through 500 HP, both low voltage (LV) and medium voltage (MV). The IEEE Standard 841 has been revised as IEEE-Std 841-2001 and is expected to be in use for at least five years. The TEFC motors covered in this standard have found wide acceptance in the pulp and paper industry. Much of the material also applies to large motors sizes. The thermal impact on the stator winding, rotor core, bearings and lubrications as specified in standards and applied in mills are considered.
{"title":"Motor temperature considerations for pulp and paper mill applications","authors":"T. Albers, A. Bonnett","doi":"10.1109/PAPCON.2002.1015139","DOIUrl":"https://doi.org/10.1109/PAPCON.2002.1015139","url":null,"abstract":"This paper reviews the motor temperature operating consideration for totally enclosed fan cooled (TEFC), open dripproof (ODP) and weather protected II (WP-II) type of motor through 500 HP, both low voltage (LV) and medium voltage (MV). The IEEE Standard 841 has been revised as IEEE-Std 841-2001 and is expected to be in use for at least five years. The TEFC motors covered in this standard have found wide acceptance in the pulp and paper industry. Much of the material also applies to large motors sizes. The thermal impact on the stator winding, rotor core, bearings and lubrications as specified in standards and applied in mills are considered.","PeriodicalId":295977,"journal":{"name":"Conference Record of the 2002 Annual Pulp and Paper Industry Technical Conference (Cat. No.02CH37352)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114752535","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 : 2002-06-17DOI: 10.1109/PAPCON.2002.1015130
M. Valenzuela, J. Bentley, R. Lorenz
Proper operation of the dry-end of a paper machine requires some type of sheet tension control. Present systems use either indirect speed control based schemes, or sensor based direct tension control utilizing load cells or swing rolls. The indirect schemes are inadequate for most newer machines, and both types of the commonly used sensor based schemes are invasive, expensive, require either special, or extra rolls, and add complexity to the sheet runs. This paper proposes and evaluates sheet tension estimation using only conventional motor and control signals, present in all newer drive controllers, integrated into a process model observer. This observer-based approach eliminates the need for the invasive tension transducers, and may also be used to replace the inaccurate indirect speed control schemes.
{"title":"Sensorless tension control in paper machines","authors":"M. Valenzuela, J. Bentley, R. Lorenz","doi":"10.1109/PAPCON.2002.1015130","DOIUrl":"https://doi.org/10.1109/PAPCON.2002.1015130","url":null,"abstract":"Proper operation of the dry-end of a paper machine requires some type of sheet tension control. Present systems use either indirect speed control based schemes, or sensor based direct tension control utilizing load cells or swing rolls. The indirect schemes are inadequate for most newer machines, and both types of the commonly used sensor based schemes are invasive, expensive, require either special, or extra rolls, and add complexity to the sheet runs. This paper proposes and evaluates sheet tension estimation using only conventional motor and control signals, present in all newer drive controllers, integrated into a process model observer. This observer-based approach eliminates the need for the invasive tension transducers, and may also be used to replace the inaccurate indirect speed control schemes.","PeriodicalId":295977,"journal":{"name":"Conference Record of the 2002 Annual Pulp and Paper Industry Technical Conference (Cat. No.02CH37352)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128500357","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 : 2002-06-17DOI: 10.1109/PAPCON.2002.1015148
D. de Kerf, M. Jhaveri
This paper describes advanced process management features of intelligent recipe management compared to the conventional recipe management solutions. Aspects that are mentioned are dynamic optimization of set points, dynamic control recipes and the integration of the process in the total supply chain. The benefits of each of these features in a typical blend application are mentioned, too.
{"title":"The benefits of intelligent recipe management","authors":"D. de Kerf, M. Jhaveri","doi":"10.1109/PAPCON.2002.1015148","DOIUrl":"https://doi.org/10.1109/PAPCON.2002.1015148","url":null,"abstract":"This paper describes advanced process management features of intelligent recipe management compared to the conventional recipe management solutions. Aspects that are mentioned are dynamic optimization of set points, dynamic control recipes and the integration of the process in the total supply chain. The benefits of each of these features in a typical blend application are mentioned, too.","PeriodicalId":295977,"journal":{"name":"Conference Record of the 2002 Annual Pulp and Paper Industry Technical Conference (Cat. No.02CH37352)","volume":"236 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116094508","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：