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2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference最新文献

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Zone based protection for low voltage systems; zone selective interlocking, bus differential and the single processor concept 低压系统的区域保护;区域选择性联锁，总线差动和单处理器的概念
2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 2008-06-22 DOI: 10.1109/PAPCON.2008.4585830
M. Valdes, P. Hamer, T. Papallo, R. Narel, B. Premerlani
{"title":"Zone based protection for low voltage systems; zone selective interlocking, bus differential and the single processor concept","authors":"M. Valdes, P. Hamer, T. Papallo, R. Narel, B. Premerlani","doi":"10.1109/PAPCON.2008.4585830","DOIUrl":"https://doi.org/10.1109/PAPCON.2008.4585830","url":null,"abstract":"Time based coordination and protection is the normal basis for coordinating low voltage power distribution systems. Enhancements, such as zone selective interlocking and bus differential protection, may be used to accelerate protective devices. However, these improvements may be costly, difficult to implement, and may not function as expected using commonly available technology. Nevertheless, the potential benefit of fault clearing speed and selectivity are more valued in todaypsilas arc-flash and reliability conscious environment than ever before. The writers shall discuss some issues associated with these traditional improvements, pitfalls to avoid and, more effective ways to implement zone-based protection to achieve fast fault protection while maintaining complete selectivity for a broad range of fault magnitudes, system configurations and load types.","PeriodicalId":323960,"journal":{"name":"2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114363023","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
Implementation and analysis of an improved series-loaded resonant dc-dc converter operating above resonance for battery chargers 一种改进的串联负载谐振型直流-直流变换器的实现与分析
2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 2008-05-04 DOI: 10.1109/ICPS.2008.4606300
Y. Chuang, Y. Ke, H. Chuang, Hung-Kun Chen
{"title":"Implementation and analysis of an improved series-loaded resonant dc-dc converter operating above resonance for battery chargers","authors":"Y. Chuang, Y. Ke, H. Chuang, Hung-Kun Chen","doi":"10.1109/ICPS.2008.4606300","DOIUrl":"https://doi.org/10.1109/ICPS.2008.4606300","url":null,"abstract":"The well established advantages of resonant converters, including simplicity of circuit configuration, easy of the control scheme, low switching losses, and low electromagnetic interference (EMI), among others, have led to their attracting more interest. This work develops a highly efficient battery charger with an improved series-loaded resonant converter for renewable energy applications to improve the performance of traditional switching-mode charger circuits. The switching frequency of the improved series-loaded resonant battery charger was at continuous conduction mode (CCM). Circuit operation modes are determined from the conduction profiles. Operating equations and operating theory are also developed. This study utilizes the fundamental wave approximation and a battery equivalent circuit to simplify the circuit analyses. The mean charging efficiency of the proposed topology is as high as 87.5%.","PeriodicalId":323960,"journal":{"name":"2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121550001","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: 30
Considerations and improvements of configuration and protection of a 72 kV mining resistance neutral grounded system 72kv矿用电阻中性接地系统配置与保护的考虑与改进
2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 2008-05-04 DOI: 10.1109/ICPS.2008.4606279
R. Rifaat
{"title":"Considerations and improvements of configuration and protection of a 72 kV mining resistance neutral grounded system","authors":"R. Rifaat","doi":"10.1109/ICPS.2008.4606279","DOIUrl":"https://doi.org/10.1109/ICPS.2008.4606279","url":null,"abstract":"This paper provides a discussion on grounding of the neutral of a 72 kV mining system supply with high and low resistance grounding (HRG/LRG), and proposes improvements to the configuration and protection associated with neutral resistance grounded (NRG) systems. For safety reasons, the ground potential rise (GPR) of the switchyards in the mine is limited to 100 Volt. In addition to the reduction of the mine switchyardpsilas ground resistance, the line-to-ground-fault current is reduced by inserting NGR between the ground and the neural of the source transformer. The paper examines the technical viability of extending techniques used for systems of lower voltages such as those used on some generatorpsilas HRG, to a 72 kV mine system. With the advancement of numerical relays and the economical availability of such relays improved protection systems could be adapted for the subject installations.","PeriodicalId":323960,"journal":{"name":"2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116905243","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
Ground fault protection in low voltage solidly grounded wye systems, need for protection and the need for reliability 接地故障保护在低压接地系统中，既需要保护又需要可靠性
2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 2008-05-04 DOI: 10.1109/ICPS.2008.4606295
M. Valdes
{"title":"Ground fault protection in low voltage solidly grounded wye systems, need for protection and the need for reliability","authors":"M. Valdes","doi":"10.1109/ICPS.2008.4606295","DOIUrl":"https://doi.org/10.1109/ICPS.2008.4606295","url":null,"abstract":"Reliable power distribution systems require adequate protection and adequate protection requires reliable protection systems. The need for ground fault protection in low voltage solidly grounded wye systems is well documented in literature, standards and has been part of the national electrical code (NFPA 70) since 1971. The potential effect of ground fault protection on system reliability is a realistic concern, hence the various references indicating when ground fault protection is to be used and not to be used or recommended. How to mitigate the potential negative effects on system reliability is treated in article 517.17 of NFPA 70 (2005). Recent changes in NFPA 70 have made the complexity of LV ground protection and system reliability more prominent. This paper will provide an overview of why LV ground fault protection became the standard we take for granted today. Additionally, the author will summarize some of the key descriptions of arcing fault in industry literature as well as descriptions in current standards that define the devices and protection commonly used today. Key aspects of how devices respond to fault current will be discussed. Finally, the author will provide an analysis of selectivity and system reliability issues involving ground fault protection.","PeriodicalId":323960,"journal":{"name":"2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127255151","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: 5
Voltage profile estimation and control of a distribution feeder 配电馈线电压分布估计与控制
2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 2008-05-04 DOI: 10.1109/ICPS.2008.4606286
D. Chessmore, Weijen Lee, W. Muston, T. Anthony, F. Daniel, L. Kohrmann
{"title":"Voltage profile estimation and control of a distribution feeder","authors":"D. Chessmore, Weijen Lee, W. Muston, T. Anthony, F. Daniel, L. Kohrmann","doi":"10.1109/ICPS.2008.4606286","DOIUrl":"https://doi.org/10.1109/ICPS.2008.4606286","url":null,"abstract":"Monitoring the voltage profile of a distribution feeder can improve the reliability and quality of the distribution power system. However, economic constraints limit widespread deployment of monitoring equipment. This paper presents a method to estimate the voltage profile of a radial distribution feeder with limited number of monitoring points. Using the voltage profile estimation, load forecasting information, and the bus impedance matrix, this paper also describes a technique to find an optimal capacitor bank switching sequence that minimizes the number of switching changes along the feeder for a 24 hour period.","PeriodicalId":323960,"journal":{"name":"2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125269814","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
Coordination of generator protection with generator excitation control and generator capability 协调发电机保护、发电机励磁控制和发电机性能
2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 2008-05-04 DOI: 10.1109/ICPS.2008.4606278
C. Mozina, M. Reichard, Z. Bukhala, S. Conrad, T. Crawley, J. Gardell, R. Hamilton, I. Hasenwinkle, D. Herbst, L. Henriksen, G. Johnson, P. Kerrigan, S. Khan, G. Kobet, P. Kumar, S. Patel, B. Nelson, D. Sevcik, M. Thompson, J. Uchiyama, S. Usman, P. Waudby, M. Yalla
{"title":"Coordination of generator protection with generator excitation control and generator capability","authors":"C. Mozina, M. Reichard, Z. Bukhala, S. Conrad, T. Crawley, J. Gardell, R. Hamilton, I. Hasenwinkle, D. Herbst, L. Henriksen, G. Johnson, P. Kerrigan, S. Khan, G. Kobet, P. Kumar, S. Patel, B. Nelson, D. Sevcik, M. Thompson, J. Uchiyama, S. Usman, P. Waudby, M. Yalla","doi":"10.1109/ICPS.2008.4606278","DOIUrl":"https://doi.org/10.1109/ICPS.2008.4606278","url":null,"abstract":"This paper was written by a Working Group of the IEEE Power System Relay Committee to provide guidance to the industry to better coordinate generator protection with generator control. The paper discusses specific calculation methods that can be used to insure generator protection and excitation system control are fully coordinated. It also specifically addresses the coordination of relays with generator full load capability and machine steady state stability limits. Because of recent blackouts, NERC (North American Electric Reliability Council) is developing standards [1–3] for the coordination of generator protection and control. This paper provides practical guidance on providing this coordination.","PeriodicalId":323960,"journal":{"name":"2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132020851","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: 57
Basic elements of electro-forensic engineering 电子法医工程的基本要素
2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 2008-05-04 DOI: 10.1109/ICPS.2008.4606276
R. E. Nabours
{"title":"Basic elements of electro-forensic engineering","authors":"R. E. Nabours","doi":"10.1109/ICPS.2008.4606276","DOIUrl":"https://doi.org/10.1109/ICPS.2008.4606276","url":null,"abstract":"The basic elements of forensic engineering are presented with emphasis on the electrical engineerpsilas function as a forensic engineer. The elements of forensic engineering including the application of the scientific method to forensic investigations are discussed. The importance and function of electrical codes and standards in the legal system are emphasized.","PeriodicalId":323960,"journal":{"name":"2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132270529","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
Four color theorem explained by electrical operational procedures? 四色定理用电学操作程序解释?
2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 2008-05-04 DOI: 10.1109/ICPS.2008.4606284
G. Parise
{"title":"Four color theorem explained by electrical operational procedures?","authors":"G. Parise","doi":"10.1109/ICPS.2008.4606284","DOIUrl":"https://doi.org/10.1109/ICPS.2008.4606284","url":null,"abstract":"In human reasoning and multi-modal information processing, the diagrams offer a visual clarity in examining spatial constraints. Special diagrams like transitions maps are introduced for assisting the elaboration of operational procedures and for helping the training of operators. Adding visual-logic weights like values, colors or level curves, the diagrams assist better in recognizing conditioned inferences and in elaborating correctly procedures. The transitions maps extend the Euler-Venn diagrams and concur to an explanation of the four-color theorem.","PeriodicalId":323960,"journal":{"name":"2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124787563","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: 10
A new approach to low-voltage circuit breaker short-circuit selective coordination 低压断路器短路选择协调的一种新方法
2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 2008-05-04 DOI: 10.1109/ICPS.2008.4606293
E. Larsen
{"title":"A new approach to low-voltage circuit breaker short-circuit selective coordination","authors":"E. Larsen","doi":"10.1109/ICPS.2008.4606293","DOIUrl":"https://doi.org/10.1109/ICPS.2008.4606293","url":null,"abstract":"The expanded requirements in the 2005 NEC for selective coordination have prompted many engineers to question if selective coordination can be achieved with low-voltage circuit breakers. This is a valid question as the time-current curves of low-voltage circuit breakers often suggest that coordination can only be achieved in the overload and low level fault current zones. Therefore, how time-current curves are developed and their limitations are discussed. A new way for system designers to evaluate the level of selective coordination between low- voltage circuit breakers is introduced, indicating that higher levels of coordination can be achieved than those shown by the use of time-current curves alone.","PeriodicalId":323960,"journal":{"name":"2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125407930","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: 11
Reliability and cost comparison of power distribution configurations 配电配置的可靠性和成本比较
2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 2008-05-04 DOI: 10.1109/ICPS.2008.4606289
V. Wagner
{"title":"Reliability and cost comparison of power distribution configurations","authors":"V. Wagner","doi":"10.1109/ICPS.2008.4606289","DOIUrl":"https://doi.org/10.1109/ICPS.2008.4606289","url":null,"abstract":"Reliability and installed cost are key parameters in the selection of the appropriate power system distribution design. This paper presents a relative comparison of reliability and costs for radial, primary selective, looped, main-tie-main, synchronous bus, ring bus, and double bus medium voltage configurations. It also examines radial, main-tie-main and spot network for low voltage. To simplify the analysis, the alternate source is assumed always available. The derivation of the results for the medium voltage main-tie-main is shown in detail as an example to demonstrate the methodology. The advantages of the various topologies are discussed and compared.","PeriodicalId":323960,"journal":{"name":"2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131206444","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: 12
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