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Conference Record Industrial and Commercial Power Systems Technical Conference 1993最新文献

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A lightning prevention system for industrial applications 用于工业应用的防雷系统
Conference Record Industrial and Commercial Power Systems Technical Conference 1993 Pub Date : 1993-05-02 DOI: 10.1109/ICPS.1993.290590
R. B. Carpenter, L. Marsh, R. L. Auer
{"title":"A lightning prevention system for industrial applications","authors":"R. B. Carpenter, L. Marsh, R. L. Auer","doi":"10.1109/ICPS.1993.290590","DOIUrl":"https://doi.org/10.1109/ICPS.1993.290590","url":null,"abstract":"Lightning presents specific hazards to any industrial facility. These hazards are caused by lightning strikes, as well as their secondary effects, and can be defined as: direct strikes to the facility; penetrability of the facility walls to electromagnetic pulses; transient voltages on incoming and outgoing power lines, data lines and telephone lines; and the bound charge hazard. A lightning prevention system which eliminates both lightning strikes and damaging secondary effects is described. The authors discuss collector-driver systems and the stroke prevention concept.<<ETX>>","PeriodicalId":327874,"journal":{"name":"Conference Record Industrial and Commercial Power Systems Technical Conference 1993","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125180964","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
Computer based harmonic simulation and testing for microprocessor-based phase distance relay with phase locator 带相位定位器的微处理机相距继电器的计算机谐波仿真与测试
Conference Record Industrial and Commercial Power Systems Technical Conference 1993 Pub Date : 1993-05-02 DOI: 10.1109/ICPS.1993.290585
R. Rob, Ward Jewell
{"title":"Computer based harmonic simulation and testing for microprocessor-based phase distance relay with phase locator","authors":"R. Rob, Ward Jewell","doi":"10.1109/ICPS.1993.290585","DOIUrl":"https://doi.org/10.1109/ICPS.1993.290585","url":null,"abstract":"The effect of harmonics on the operation of microprocessor-based phase distance and ground directional overcurrent relay and fault locator is addressed. The testing facility consists of a computer-based three phase harmonic source, programmable three phase voltage and current amplifiers, and a digital-to-analog interface board. The software generates the harmonics and detects any trip action by the relay. Extensive experiments are performed in which the relays are subject to a matrix of distortion frequencies, magnitudes, and phases. The results of these experiments are discussed, and suggestions on the applications of the relay are given.<<ETX>>","PeriodicalId":327874,"journal":{"name":"Conference Record Industrial and Commercial Power Systems Technical Conference 1993","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124214238","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: 9
Thermal considerations in specifying dry type transformers 指定干式变压器时的热考虑
Conference Record Industrial and Commercial Power Systems Technical Conference 1993 Pub Date : 1993-05-02 DOI: 10.1109/ICPS.1993.290580
L. W. Pierce
{"title":"Thermal considerations in specifying dry type transformers","authors":"L. W. Pierce","doi":"10.1109/ICPS.1993.290580","DOIUrl":"https://doi.org/10.1109/ICPS.1993.290580","url":null,"abstract":"Thermal tests under different loading conditions are performed on a prototype 2500 kVA ventilated dry type transformer and six full size test coils with imbedded thermocouples in the windings. The test data indicated that the hottest spot temperature allowance used in IEEE and IEC standards is too low for ventilated dry type transformers above 500 kVA. It is impossible to design ventilated dry type transformers above 500 kVA with an average temperature rise of 150 degrees C without exceeding the permissible hottest spot temperature rise of 180 degrees C due to large thermal gradients. The average temperature rise for ventilated dry type transformers above 500 kVA with 220 degrees C insulation temperature class should be 120 degrees C. IEEE standards should require measurement of hottest spot temperature rise on prototype transformers or windings as a design test to qualify a design family and the manufacturer's mathematical models. The specification suggested should be used until IEEE standards are revised.<<ETX>>","PeriodicalId":327874,"journal":{"name":"Conference Record Industrial and Commercial Power Systems Technical Conference 1993","volume":"89 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134162042","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: 31
Generating peaking unit operating characteristics 发电调峰机组工作特性
Conference Record Industrial and Commercial Power Systems Technical Conference 1993 Pub Date : 1993-05-02 DOI: 10.1109/2943.407080
D. Koval, A. Chowdhury
{"title":"Generating peaking unit operating characteristics","authors":"D. Koval, A. Chowdhury","doi":"10.1109/2943.407080","DOIUrl":"https://doi.org/10.1109/2943.407080","url":null,"abstract":"The results of a statistical analysis of the states of continuous operation of several peaking generating units over a period of 9 years are presented. The significance of these operational patterns and their statistical characteristics and the implications for assessing the reliability of peaking generating units are discussed and referenced in detail. Based on a historical analysis of generator unit outage statistics, answers to many questions posed by utility personnel are addressed and discussed in some detail. Answers to these questions can have a significant impact on generation capacity planning and operating studies. Emphasis is placed on state transitions between reserve shut down states and operating states and generator starting characteristics.<<ETX>>","PeriodicalId":327874,"journal":{"name":"Conference Record Industrial and Commercial Power Systems Technical Conference 1993","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130135840","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: 9
Electronically enhanced low voltage motor protection and control 电子增强低压电机保护和控制
Conference Record Industrial and Commercial Power Systems Technical Conference 1993 Pub Date : 1993-05-02 DOI: 10.1109/ICPS.1993.290574
S. F. Farag, R. G. Bartheld, W. E. May
{"title":"Electronically enhanced low voltage motor protection and control","authors":"S. F. Farag, R. G. Bartheld, W. E. May","doi":"10.1109/ICPS.1993.290574","DOIUrl":"https://doi.org/10.1109/ICPS.1993.290574","url":null,"abstract":"By examining the true operating characteristics of motors, a motor protection system is designed that closely models the effects of motor currents on the winding and housing temperatures. Experimentally determined parameters allow this model to track thermal performance, even when the motor is sitting still after tripping. This protection and control system, using the power of a microcomputer, can provide other modes of protection not available with the common thermal overload relay. Ground fault protection, phase unbalance and loss of phase protection, jam and loss of load protection are all included in the software. The system can eliminate most of the control wiring and relaying necessary for complex motor starter circuits.<<ETX>>","PeriodicalId":327874,"journal":{"name":"Conference Record Industrial and Commercial Power Systems Technical Conference 1993","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130951413","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: 45
Rocket-triggered lightning studies for the protection of critical assets 用于保护关键资产的火箭触发闪电研究
Conference Record Industrial and Commercial Power Systems Technical Conference 1993 Pub Date : 1993-05-02 DOI: 10.1109/ICPS.1993.290593
M. Morris, R. Fisher, G. Schnetzer, K. Merewether, R. Jorgenson
{"title":"Rocket-triggered lightning studies for the protection of critical assets","authors":"M. Morris, R. Fisher, G. Schnetzer, K. Merewether, R. Jorgenson","doi":"10.1109/ICPS.1993.290593","DOIUrl":"https://doi.org/10.1109/ICPS.1993.290593","url":null,"abstract":"The authors report on a computer program to determine quantitatively the electromagnetic (EM) environments inside an explosives storage structure that is struck by lightning. These environments were measured directly during rocket-triggered lightning (RTL) tests and were computed using linear finite-difference, time-domain (FDTD) EM solvers. The experimental and computational results were first compared in order to validate the code, and were then used to construct bounds for interior environments corresponding to severe incident lightning flashes. The code results were also used to develop simple circuit models for the EM field behavior-a process that resulted in a very simple physical interpretation of the structure's response that has significant practical and economic implications for design, construction, and maintenance of such facilities.<<ETX>>","PeriodicalId":327874,"journal":{"name":"Conference Record Industrial and Commercial Power Systems Technical Conference 1993","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128061231","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: 16
Reactive power flow control and compensation in the industrial distribution systems 工业配电系统中的无功潮流控制与补偿
Conference Record Industrial and Commercial Power Systems Technical Conference 1993 Pub Date : 1993-05-02 DOI: 10.1109/ICPS.1993.290578
J. Das
{"title":"Reactive power flow control and compensation in the industrial distribution systems","authors":"J. Das","doi":"10.1109/ICPS.1993.290578","DOIUrl":"https://doi.org/10.1109/ICPS.1993.290578","url":null,"abstract":"Uncontrolled reactive power flow in an industrial distribution system can give rise to excessive active and reactive power losses and voltage drops on steady-state load flow. In an interconnected distribution system with cogeneration, voltage drops under contingency conditions, i.e., on loss of a generator or tie line, can disrupt the continuous processes. The active power rating of the distribution system components can be seriously degraded. The author reports on reactive power generating and consuming devices typical of an industrial distribution system and their voltage sensitivities and control characteristics. Reactive power flow problems and control strategies in two industrial distribution systems are discussed.<<ETX>>","PeriodicalId":327874,"journal":{"name":"Conference Record Industrial and Commercial Power Systems Technical Conference 1993","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133470982","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
Predicting behavior of induction motors during electrical service faults and momentary voltage interruptions 感应电动机在电力服务故障和瞬间电压中断时的行为预测
Conference Record Industrial and Commercial Power Systems Technical Conference 1993 Pub Date : 1993-05-02 DOI: 10.1109/ICPS.1993.290584
S. Chattopadhyay, T. Key
{"title":"Predicting behavior of induction motors during electrical service faults and momentary voltage interruptions","authors":"S. Chattopadhyay, T. Key","doi":"10.1109/ICPS.1993.290584","DOIUrl":"https://doi.org/10.1109/ICPS.1993.290584","url":null,"abstract":"Dynamic simulations are used to predict the low voltage ride-through performance of three common motor and power source configurations. The objectives are to identify motor control and protection strategies that increase the motor's immunity to expected low voltage events while pointing out specific problems and opportunities. Configurations include transfer of a group of motors from one power source to another, ride-through of a single motor during low voltage events, and ride-through of a motor buffered by an adjustable-speed drive. Low voltage conditions match those expected to occur due to faults in the utility power system with the transformer connection considered.<<ETX>>","PeriodicalId":327874,"journal":{"name":"Conference Record Industrial and Commercial Power Systems Technical Conference 1993","volume":"214 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121199131","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
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