中国石油和化工(企业版)最新文献_第9页

Understanding of induction motors made easy 理解感应电机变得容易

中国石油和化工(企业版) Pub Date : 2011-11-28 DOI: 10.1109/PCICON.2011.6085874

Harry Li, R. Curiac

引用次数: 1

Considering process temperatures when designing electrical heat tracing for hazardous areas 在设计危险区域的电伴热时考虑工艺温度

中国石油和化工(企业版) Pub Date : 2011-11-28 DOI: 10.1109/PCICON.2011.6085878

S. Parikh, Michael J. Sustarich, R. Hulett, Eric Reitler

引用次数: 1

Advanced cable diagnostics - evaluation, selection, application and experience on medium voltage shielded power cables at a petrochemical facility 先进电缆诊断。石化设备中压屏蔽电力电缆的评估、选择、应用和经验

中国石油和化工(企业版) Pub Date : 2011-11-28 DOI: 10.1109/PCICON.2011.6085900

D. Eaton, C. Schiro, Terry W. Perilloux, C. Goodwin

引用次数: 8

The power of IEC 61850 for bus transfer and load shedding applications 用于总线传输和减载应用的IEC 61850的功率

中国石油和化工(企业版) Pub Date : 2011-01-01 DOI: 10.1109/MIAS.2012.2215641

L. Sevov, T. Zhao, I. Voloh

引用次数: 13

Improving electrical saftey in an electrolytic cell line 提高电解槽生产线的电气安全性

中国石油和化工(企业版) Pub Date : 2010-12-13 DOI: 10.1109/PCIC.2010.5666817

A. Long, Brad Boyd, J. Phillips, Ray Machado, E. Kelly, Marcelle Tremblay, Edward J Cialkowski

{"title":"Improving electrical saftey in an electrolytic cell line","authors":"A. Long, Brad Boyd, J. Phillips, Ray Machado, E. Kelly, Marcelle Tremblay, Edward J Cialkowski","doi":"10.1109/PCIC.2010.5666817","DOIUrl":"https://doi.org/10.1109/PCIC.2010.5666817","url":null,"abstract":"Due to the design and layout of the electrolytic cell production plant, electrical safety is challenging. The cells, which are connected in a series circuit creating a large layout, are powered by a 200–500 volt DC source, which is intentionally ungrounded to provide personnel and equipment protection. Detection of the first ground connection of the electrolytic cell line is critical to ensure safety to personnel. Traditional methods of ground connection monitoring of a cell line, such as midpoint zero-volt detection, require constant analysis of data to determine if the first ground exists. This method can easily lead to human error, since the zero-volt location changes when cells are removed or added to the cell line. Also, the midpoint zero-volt method only functions when the cell line is energized, which makes troubleshooting not only a safety concern but also difficult. Moreover, if the ground connection occurs at the zero-volt location, there is no indication of the increased electrical hazard. Protection from electrical shocks and electrocution is safety critical and requires an instrument that continuously monitors the dynamic insulation resistance-to-ground of the entire cell line. The instrument must perform this vital safety function whether the cell line is energized or de-energized, so that finding the first ground quickly is easy and can be achieved without applying power to the cell line. Existing DC ground fault detection equipment, or insulation monitoring device, used in the mass transit and other industries has been adapted to accomplish this necessary ground fault detection in the electrolytic cell line; thereby, improving electrical safety in an electrolytic cell line.","PeriodicalId":67291,"journal":{"name":"中国石油和化工(企业版)","volume":"37 1","pages":"1-13"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74210344","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

Harmonizing ventilation requirements for indoor lighter than air hazardous atmospheres 协调室内比空气轻的危险环境的通风要求

中国石油和化工(企业版) Pub Date : 2010-12-13 DOI: 10.1109/PCIC.2010.5666865

Troy Rains, Bipin Satavalekar

引用次数: 2

Failure analysis of 7500 HP induction motors driving reciprocating compressors with three years service 使用三年往复压缩机的7500马力感应电动机的故障分析

中国石油和化工(企业版) Pub Date : 2010-12-13 DOI: 10.1109/PCIC.2010.5666845

R. Hanna, D. W. Schmitt

{"title":"Failure analysis of 7500 HP induction motors driving reciprocating compressors with three years service","authors":"R. Hanna, D. W. Schmitt","doi":"10.1109/PCIC.2010.5666845","DOIUrl":"https://doi.org/10.1109/PCIC.2010.5666845","url":null,"abstract":"This paper presents the failure analysis and field measurements of five 7500 HP induction motors driving reciprocating compressors for a natural gas compression station. The motors were in service for less than three years when two of them suffered cooling fan failures. Four of the five motors were individually sent one at a time to a motor repair shop to be fitted with a modified cooling fan per the manufacturer's recommendation. It was during one of the fan replacement processes that the repair shop, accidentally, discovered that many of the magnetic wedges were missing. The end user is not always aware if a motor is provided with magnetic or non-magnetic wedges unless identified in the motor engineering specification. This paper presents the findings on the failure analysis of both the cooling fans and magnetic wedges for these motors. This failure analysis examined fan design, vibration, motor operating temperature, compressor loading profile, number of motor starts, and ambient temperature. The paper also presents a comparison between direct on line motor starting and soft starting using an adjustable speed drive and the impact on motor performance. The settings and historical data gathered from the microprocessor protection relay for the motors will also be covered and discussed.","PeriodicalId":67291,"journal":{"name":"中国石油和化工(企业版)","volume":"29 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82601343","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: 7

Design of a priority-based load shed scheme and operation tests 基于优先级的减载方案设计及运行试验

中国石油和化工(企业版) Pub Date : 2010-12-13 DOI: 10.1109/PCIC.2010.5666862

M. Adamiak, M. Schiefen, G. Schauerman, B. Cable

引用次数: 22

Harmonic analysis and multi-stage filter design for a large bleach production facility 某大型漂白剂生产装置的谐波分析及多级过滤器设计

中国石油和化工(企业版) Pub Date : 2010-12-13 DOI: 10.1109/PCIC.2010.5666827

R. Pragale, T. Dionise, D. Shipp

引用次数: 11

Improvements in protection and commissioning of digital transformer relays at medium voltage industrial facilities 中压工业设施数字式变压器继电器保护和调试的改进

中国石油和化工(企业版) Pub Date : 2010-12-13 DOI: 10.1109/PCIC.2010.5666837

C. Mozina

{"title":"Improvements in protection and commissioning of digital transformer relays at medium voltage industrial facilities","authors":"C. Mozina","doi":"10.1109/PCIC.2010.5666837","DOIUrl":"https://doi.org/10.1109/PCIC.2010.5666837","url":null,"abstract":"The application of multifunction digital relays to protect medium voltage power transformers has become a common industrial practice. Industrial transformers, unlike utility transformers, frequently use neutral grounding resistors to limit ground current during faults to 200–400A range on medium voltage systems. This paper will discuss why these types of transformers require sensitive ground differential protection. The paper will also discuss the basics of transformer protection including: phasing standards, through-fault withstand capability, differential/fusing/overcurrent protection, slope, CT requirements, harmonic restraint, and communicating these requirements properly when programming and commissioning new digital relays. The rationale for providing transformer overexcitation protection on all major transformers within industrial facilities is also addressed. Advancements in digital technology have allowed relay manufacturers to include more and more relay functions within a single hardware platform as well as address more and more transformer winding configurations. This has resulted in digital transformer relays requiring an Einstein to set and an Edison to commission. Since there are few Einstein's and Edison's among us, the next generation of transformer relays needs to concentrate on this complexity issue in addition to technical improvements. This paper addresses these issues that the author believes are the major shortcomings of existing digital transformer protective relays.","PeriodicalId":67291,"journal":{"name":"中国石油和化工(企业版)","volume":"118 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89219702","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