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Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference最新文献

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Voltage sags: their impact on the utility and industrial customers 电压跌落:它们对公用事业和工业客户的影响
Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 1996-05-06 DOI: 10.1109/ICPS.1996.533938
T. Davis, G. E. Beam, C. Melhorn
{"title":"Voltage sags: their impact on the utility and industrial customers","authors":"T. Davis, G. E. Beam, C. Melhorn","doi":"10.1109/ICPS.1996.533938","DOIUrl":"https://doi.org/10.1109/ICPS.1996.533938","url":null,"abstract":"This paper describes the impact of voltage sags on the utility and industrial customers. Several utility measures are presented to minimize the customer's exposure to voltage sags. However, these measures cannot completely eliminate the impact of voltage sags on sensitive equipment. A case study is presented in this paper that includes measurement results that were used to characterize the voltage sags experienced on the utility system and in the industrial facility, simulation results that were used to develop \"area of vulnerability curves\" for the industrial facility, mitigation equipment that was employed to improve the sensitive equipment's ride through capability, and the lessons learned from the systems approach analysis.","PeriodicalId":122944,"journal":{"name":"Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123819058","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: 130
Complete characterization of utilization-voltage power system impedance using wideband measurement 利用宽带测量完成利用电压电力系统阻抗的表征
Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 1996-05-06 DOI: 10.1109/ICPS.1996.533946
J. Rhode, A. Kelley, M. Baran
{"title":"Complete characterization of utilization-voltage power system impedance using wideband measurement","authors":"J. Rhode, A. Kelley, M. Baran","doi":"10.1109/ICPS.1996.533946","DOIUrl":"https://doi.org/10.1109/ICPS.1996.533946","url":null,"abstract":"Inexpensive portable instrumentation is used to measure the impedance of an example utilization-voltage power system. With the power system in normal operation, line-to-neutral, line-to-ground, and neutral-to-ground impedances are measured over a bandwidth of 20 Hz to 24 kHz. The measured impedance is presented as resistance and inductance which vary with frequency. Based on the measurements, additional calculations are performed to find the resistance and inductance of every conductor in the system. This complete wideband characterization of power system impedance provides valuable data for power quality calculations.","PeriodicalId":122944,"journal":{"name":"Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117185928","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: 82
Survey results of low voltage circuit breakers as found during maintenance testing 维修试验中低压断路器的调查结果
Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 1996-05-06 DOI: 10.1109/ICPS.1996.535731
P. O'donnell
{"title":"Survey results of low voltage circuit breakers as found during maintenance testing","authors":"P. O'donnell","doi":"10.1109/ICPS.1996.535731","DOIUrl":"https://doi.org/10.1109/ICPS.1996.535731","url":null,"abstract":"The Power Systems Reliability Subcommittee strives to maintain current reliability data on major electrical equipment to assist the industry in accomplishing realistic and meaningful reliability studies. This paper presents results of a low voltage circuit breaker reliability survey achieved through use of available results from testing during preventive maintenance. A substantial number of test results were obtained to allow credible results for a few different circuit breaker categories. A similar set of results was published in a paper (M.J. Komblit) for the 1990 Industry Applications Society Conference. Most of these results have been incorporated into this new expanded effort.","PeriodicalId":122944,"journal":{"name":"Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference","volume":"48 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114040926","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
Applicability of neural networks to industrial and commercial power systems: a tutorial overview 神经网络在工业和商业电力系统中的适用性:教程概述
Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 1996-05-06 DOI: 10.1109/ICPS.1996.533939
S. Halpin, R. Burch
{"title":"Applicability of neural networks to industrial and commercial power systems: a tutorial overview","authors":"S. Halpin, R. Burch","doi":"10.1109/ICPS.1996.533939","DOIUrl":"https://doi.org/10.1109/ICPS.1996.533939","url":null,"abstract":"This paper is intended as a tutorial overview of neural network applications that are relevant to industrial and commercial power systems. The paper is arranged to provide the practicing engineer with answers to the following questions: (1) Why would a neural network be needed? (2) What is required to use a neural network? (3) How are neural networks superior to conventional methods? and (4) What type of results are produced by neural networks? Introductory knowledge needed for understanding the application of artificial neural networks is provided and numerous example applications are referenced. The paper is purposefully written without \"state-of-the-art\" terminology for the benefit of practicing engineers in facilities today who may not be familiar with neural networks. This paper is expected to be the first in a series that will provide a similar presentation of expert and fuzzy logic systems.","PeriodicalId":122944,"journal":{"name":"Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference","volume":"35 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132400141","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: 36
Significance of working point determining line current harmonics in controlled AC/DC converter 受控交直流变换器中工作点确定线路电流谐波的意义
Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 1996-05-06 DOI: 10.1109/ICPS.1996.533947
M. Grotzbach, M. Bauta
{"title":"Significance of working point determining line current harmonics in controlled AC/DC converter","authors":"M. Grotzbach, M. Bauta","doi":"10.1109/ICPS.1996.533947","DOIUrl":"https://doi.org/10.1109/ICPS.1996.533947","url":null,"abstract":"Determining line current harmonics in controlled AC/DC power converters, the actual working point given by the average DC voltage and the DC mean current is of significant importance. For good DC smoothing, the consideration of a sufficient control margin in many applications leads to a distinct reduction when evaluating harmonics. To investigate the general case including commutation and DC current ripple, IEEE-Std. 519 as well as the recent FFT-proposal deal with approximated angles. This simplification causes the problem of realization of the required DC mean current in cases of higher DC ripple. To avoid this, a modified version of the selection method is proposed. A comparison of time simulations shows that only this procedure determines line current harmonics with sufficient small error.","PeriodicalId":122944,"journal":{"name":"Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133150783","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
An evaluation of energy storage techniques for improving ride-through capability for sensitive customers on underground networks 提高地下电网敏感用户穿越能力的储能技术评价
Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 1996-05-06 DOI: 10.1109/ICPS.1996.533937
A. Braz, P. Hofmann, R. Mauro, C. Melhorn
{"title":"An evaluation of energy storage techniques for improving ride-through capability for sensitive customers on underground networks","authors":"A. Braz, P. Hofmann, R. Mauro, C. Melhorn","doi":"10.1109/ICPS.1996.533937","DOIUrl":"https://doi.org/10.1109/ICPS.1996.533937","url":null,"abstract":"Most Con Edison customers are supplied through extensive secondary network systems. These customers do not experience interruptions or outages except under very rare circumstances. This is a significant advantage for these customers since they do not normally need to apply conventional UPS systems for protection of critical loads against outages. However, voltage sags, which occur whenever there is a fault on the power system, can cause dropout or mis-operation of sensitive equipment. Some type of protection may be needed for these loads to provide ride through support during voltage sags. This paper describes the methodology used in a research project sponsored by EPRI and Con Edison to evaluate the need for voltage sag ride through improvement for selected customers. Technologies that can supply the required ride through and application considerations were evaluated (SMES, motor-generator sets). Two case studies are presented to illustrate the methodology used to perform the evaluations.","PeriodicalId":122944,"journal":{"name":"Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116684929","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: 38
Limitations of current limiting protectors for expansion of electrical distribution systems 配电系统扩展用限流保护器的局限性
Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 1996-05-06 DOI: 10.1109/ICPS.1996.533936
J. Das
{"title":"Limitations of current limiting protectors for expansion of electrical distribution systems","authors":"J. Das","doi":"10.1109/ICPS.1996.533936","DOIUrl":"https://doi.org/10.1109/ICPS.1996.533936","url":null,"abstract":"Application of current limiting protectors (CLPs) has been recommended in the existing literature to retain underrated medium voltage circuit breakers of lower short-circuit ratings in service, when the distribution systems are expanded and the short-circuit currents increase. However, the existing published literature does not describe the limitations of CLPs from system separation and loss of protective device coordination conditions, nor does it provide an analysis of short-circuit duties of medium voltage circuit breakers used with CLPs. The paper shows how these evaluations can be carried out. Considerations of high cost of replacements, the far greater loss of production due to lack of coordination and availability of a proven alternate solution should be included in an informed decision to use CLPs. 'CLP', 'triggered fault current limiter (TCL)', 'CLIP', and 'I/sub s/ Limiter' are synonymous.","PeriodicalId":122944,"journal":{"name":"Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115426871","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
Study for the performance of high speed switchgear for protection of in-house generation system 室内发电系统保护用高速开关柜性能研究
Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 1996-05-06 DOI: 10.1109/ICPS.1996.533941
K. Matsushita, Y. Matsuura, T. Funabashi, N. Takeuchi, T. Kai, M. Oobe
{"title":"Study for the performance of high speed switchgear for protection of in-house generation system","authors":"K. Matsushita, Y. Matsuura, T. Funabashi, N. Takeuchi, T. Kai, M. Oobe","doi":"10.1109/ICPS.1996.533941","DOIUrl":"https://doi.org/10.1109/ICPS.1996.533941","url":null,"abstract":"In large industrial plants and factories, it has become popular to use in-house generation systems connected to utility power systems. Especially, co-generation systems have been introduced to many consumers such as hotels and hospitals. However, when a fault occurs on the transmission line, voltage on the internal power system drops instantaneously until its clearance. To enhance the load's reliability, a new switchgear system has been developed. This equipment consists of static switchgear applying thyristor, disconnecting switches, and a control circuit. This control circuit has functions to detect voltage drops and voltage synchronization. This equipment is installed in series with the circuit breaker which connects the buses of the consumer's own power generation system, and executes high speed tripping and reclosing when the voltage on the consumer's bus drops instantaneously. In this paper, artificial test results of this equipment is presented. From these results, it is confirmed that this equipment can restrain voltage drop of the important loads within one cycle by means of tripping the short circuit current within one cycle when the voltage drops under the setting value. Then, comparison between measured results and simulated results by EMTP is represented. From this comparison, it is confirmed that verification of this equipment's performance using EMTP is effective. Then, influence of voltage drop (20% and 50%) on loads is investigated by simulating transient voltage change of the generator.","PeriodicalId":122944,"journal":{"name":"Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114755204","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: 13
Using transformer differential relay I/sub OP/ characteristics to measure near-trip conditions 使用变压器差动继电器I/sub OP/特性来测量近跳闸情况
Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 1996-05-06 DOI: 10.1109/ICPS.1996.533943
J. Criss, L. Lawhead
{"title":"Using transformer differential relay I/sub OP/ characteristics to measure near-trip conditions","authors":"J. Criss, L. Lawhead","doi":"10.1109/ICPS.1996.533943","DOIUrl":"https://doi.org/10.1109/ICPS.1996.533943","url":null,"abstract":"When a transformer differential relay operates with no obvious transformer fault, system operators have a serious decision to make: is there a transformer fault, or did the relay trip incorrectly? Testing the transformer requires significant time, with associated costs. However, re-energizing a faulted transformer can lead to catastrophic failure. This scenario of a questionable transformer trip occurs too often, especially during the commissioning of new transformers and/or differential relays. Usually a differential relay false trip is caused by either incorrect settings or incorrect current transformer (CT) secondary lead connections. These conditions can cause false trips for external faults, or simply transformer loading. Some indication is needed that the relay is not operating as desired, before an incorrect trip happens. A potential problem can be discovered by monitoring the operating condition of the differential relay. An indicator can serve as a warning if the settings or connections are not correct.","PeriodicalId":122944,"journal":{"name":"Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124419963","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
Development of a real time power system dynamic performance monitoring system 电力系统动态性能实时监测系统的研制
Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference Pub Date : 1993-12-07 DOI: 10.1109/ICPS.1996.533950
Weijen Lee, J. Gim, Mo-shing Chen, Shi-Ping Wang, Ren-Jun Li
{"title":"Development of a real time power system dynamic performance monitoring system","authors":"Weijen Lee, J. Gim, Mo-shing Chen, Shi-Ping Wang, Ren-Jun Li","doi":"10.1109/ICPS.1996.533950","DOIUrl":"https://doi.org/10.1109/ICPS.1996.533950","url":null,"abstract":"Power systems have grown in both size and complexity, and the dynamic characteristics of the systems vary as well. Recently, a computer simulation revealed the possibility of low frequency oscillation after the connection of a cogeneration plant to the utility grid. Though there are several possible methods to improve the dynamic stability performance of the power system, a thorough understanding of the system characteristics and possible operating conditions is required before an appropriate measure can be proposed. In order to collect more operating information without affecting normal system operation, a programmable logic controller (PLC) based dynamic performance monitoring system (DPMS) was designed and installed at the tie substation. The recorded information will be valuable for power system analysis and/or PSS design. The DPMS design, its laboratory test results, and several field operation records are discussed in the paper.","PeriodicalId":122944,"journal":{"name":"Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126737681","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: 19
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