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Proceedings of the Twenty-Second Annual North American Power Symposium最新文献

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Nonlinear oscillations and voltage collapse phenomenon in electrical power system 电力系统中的非线性振荡和电压崩溃现象
Proceedings of the Twenty-Second Annual North American Power Symposium Pub Date : 1990-10-15 DOI: 10.1109/NAPS.1990.151380
V. Ajjarapu, B. Lee
{"title":"Nonlinear oscillations and voltage collapse phenomenon in electrical power system","authors":"V. Ajjarapu, B. Lee","doi":"10.1109/NAPS.1990.151380","DOIUrl":"https://doi.org/10.1109/NAPS.1990.151380","url":null,"abstract":"The authors focus on bifurcation of modes associated with both the generator and load dynamics to show the relations between two different critical states. The authors observe that a system encounters both oscillatory-type instability and collapse-type instability using a sample power system model developed by I. Dobson et al. (1988). In addition to the collapse-type instability reported by Dobson et al., oscillatory-type instability is analyzed by using Hopf bifurcation theory. The authors analyze these two types of system instability in a sample power system via bifurcation theory. Collapse-type instability is studied through the center manifold reduction technique, which reduces the entire system dynamic model to a one dimensional manifold.<<ETX>>","PeriodicalId":330083,"journal":{"name":"Proceedings of the Twenty-Second Annual North American Power Symposium","volume":"108 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131057098","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
A SPICE model for gate turn-off thyristors 栅极关断晶闸管的SPICE模型
Proceedings of the Twenty-Second Annual North American Power Symposium Pub Date : 1990-10-15 DOI: 10.1109/NAPS.1990.151366
J. Schwartzenberg, C.L. Tsay, R. Fischl
{"title":"A SPICE model for gate turn-off thyristors","authors":"J. Schwartzenberg, C.L. Tsay, R. Fischl","doi":"10.1109/NAPS.1990.151366","DOIUrl":"https://doi.org/10.1109/NAPS.1990.151366","url":null,"abstract":"The authors present a SPICE gate turn-off thyristor (GTO) model which simulates both the static negative differential resistance characteristics and the dynamic switching characteristics. The model consists of a parallel connection of two-transistors, three-resistor (2T-3R) cells. The accuracy of the model depends on the number of 2T-3R cells used. This multi-cell GTO model enables one to simulate the static-type negative differential resistance (NDR) I-V characteristics and the switching characteristics of the GTO with a high degree of accuracy. The experimental validation test shows that two parallel 2T-3R cells simulate the switching characteristics of the GTO accurately. A sensitivity study of the SPICE model performance with respect to the model parameters is used to develop the model synthesis procedure.<<ETX>>","PeriodicalId":330083,"journal":{"name":"Proceedings of the Twenty-Second Annual North American Power Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121634352","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
Effects of harmonic voltage distortion on the terminals of single phase thyristor controlled reactors 谐波电压畸变对单相晶闸管控制电抗器端子的影响
Proceedings of the Twenty-Second Annual North American Power Symposium Pub Date : 1990-10-15 DOI: 10.1109/NAPS.1990.151356
J.F. Eggleston
{"title":"Effects of harmonic voltage distortion on the terminals of single phase thyristor controlled reactors","authors":"J.F. Eggleston","doi":"10.1109/NAPS.1990.151356","DOIUrl":"https://doi.org/10.1109/NAPS.1990.151356","url":null,"abstract":"An expression for the harmonic current of a thyristor controlled reactor (TCR) as an explicit function of its terminal voltage and thyristor firing instants is formulated in the context of the increased interest in TCR harmonics. The expression is used to examine the effects of terminal voltage distortion and is incorporated into an iterative algorithm to assess the harmonic interactions in a TCR. The response of the TCR's controller to the effects of such harmonic interaction is included in the iterative algorithm to show its importance in the interaction process, without the need for a full harmonic load flow.<<ETX>>","PeriodicalId":330083,"journal":{"name":"Proceedings of the Twenty-Second Annual North American Power Symposium","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127623121","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: 2
An expert system for contingency analysis in power systems 电力系统事故分析专家系统
Proceedings of the Twenty-Second Annual North American Power Symposium Pub Date : 1990-10-15 DOI: 10.1109/NAPS.1990.151391
M. Muslu, R. Shultz
{"title":"An expert system for contingency analysis in power systems","authors":"M. Muslu, R. Shultz","doi":"10.1109/NAPS.1990.151391","DOIUrl":"https://doi.org/10.1109/NAPS.1990.151391","url":null,"abstract":"An expert system is developed to determine the steady state security of a power system after a contingency. Line, transformer and generator outages are considered. For any load in the system, overloaded branches are determined by comparing the system load to three load levels closest to the actual system load and using generator shift or branch outage distribution factors. The expert system, in conjunction with the DC load flow, is designed to identify the harmless and harmful contingencies as well as the overload branches. If a contingency cannot be determined as harmless or harmful then an AC load flow is suggested. Turbo-Prolog is used for symbolic manipulations and reasoning. The developed system is applied to a 12 bus power system. The results indicate that the expert system can be used in contingency screening as well as online operation to assist the operator.<<ETX>>","PeriodicalId":330083,"journal":{"name":"Proceedings of the Twenty-Second Annual North American Power Symposium","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117349592","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
Speed control of series motors by means of thyristor bridges 用晶闸管桥控制串联电机的速度
Proceedings of the Twenty-Second Annual North American Power Symposium Pub Date : 1990-10-15 DOI: 10.1109/NAPS.1990.151397
Bertil S. M. Granborg
{"title":"Speed control of series motors by means of thyristor bridges","authors":"Bertil S. M. Granborg","doi":"10.1109/NAPS.1990.151397","DOIUrl":"https://doi.org/10.1109/NAPS.1990.151397","url":null,"abstract":"The behavior of a single-phase gate controlled thyristor bridge supplying a R-L network is digitally simulated. The results are compared with an experiment on the same system to verify the correctness of the digital model. A series motor is digitally simulated together with the digital model of the thyristor bridge. Speed control of the series motor is achieved by controlling the gate signals to the thyristors for delay angles from 60 degrees to 12 degrees for varying load torque. Torque and speed feedback are used to maintain constant speed of the motor for a full load torque step input. The steady state error is less than 0.2% of the no load speed.<<ETX>>","PeriodicalId":330083,"journal":{"name":"Proceedings of the Twenty-Second Annual North American Power Symposium","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127421159","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: 2
Performance evaluation of a subnetwork solution for contingency selection 一种用于应急选择的子网解决方案的性能评估
Proceedings of the Twenty-Second Annual North American Power Symposium Pub Date : 1990-10-15 DOI: 10.1109/NAPS.1990.151389
C. Cheng, A.P.S. Melipoulos
{"title":"Performance evaluation of a subnetwork solution for contingency selection","authors":"C. Cheng, A.P.S. Melipoulos","doi":"10.1109/NAPS.1990.151389","DOIUrl":"https://doi.org/10.1109/NAPS.1990.151389","url":null,"abstract":"The authors examine the computational efficiency of subnetwork solutions. A statistical approach is used to evaluate the performance of the subnetwork solution on several systems. The authors suggest that the efficiency of the subnetwork solution as compared to the full solution depends on the contingency type and the system size. For convenience, the sparsity-oriented subnetwork solution with fast forward and fast back (FF/FB) substitution of W.F. Tinney et al. (1985) is referred to as the subnetwork solution, while the conventional power flow solution with the full forward and back substitution is referred to as the direct solution. A brief description of the evaluation procedure is presented, followed with the evaluation results obtained from two large power systems. Possible application of the performance evaluation results is briefly discussed.<<ETX>>","PeriodicalId":330083,"journal":{"name":"Proceedings of the Twenty-Second Annual North American Power Symposium","volume":"185 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124749401","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
Dynamic static VAr compensation and stability of HVAC-An outlook and trend 暖通空调动态静态无功补偿与稳定性——展望与趋势
Proceedings of the Twenty-Second Annual North American Power Symposium Pub Date : 1990-10-15 DOI: 10.1109/NAPS.1990.151352
B. Hussain, A. Behera
{"title":"Dynamic static VAr compensation and stability of HVAC-An outlook and trend","authors":"B. Hussain, A. Behera","doi":"10.1109/NAPS.1990.151352","DOIUrl":"https://doi.org/10.1109/NAPS.1990.151352","url":null,"abstract":"Static VAr compensators are reviewed for their application in transmission line compensation and load compensation. Emphasis is given to the application of thyristor controlled reactors and thyristor switched capacitors. After a quick review of the application of static VAr compensators, a detailed theoretical analysis of the reactive power requirement is made. A mathematical model of the compensator is established for the possible controllable parameters. In the theoretical analysis, both symmetrical line and radial line systems are considered. Stability of a transmission line is analyzed for reactive power compensation. Present trends are discussed for finer continuous reactive power control. Solid state reactive power compensation without the need for large capacitors and reactors is seen to be the most probable candidate. Solid state devices for high power capability and transient response along with other reactive power requirements are also discussed.<<ETX>>","PeriodicalId":330083,"journal":{"name":"Proceedings of the Twenty-Second Annual North American Power Symposium","volume":"56 14","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132389755","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: 2
Microcomputer-based database management techniques for pulsed power and other system studies 基于微机的脉冲电源和其他系统的数据库管理技术研究
Proceedings of the Twenty-Second Annual North American Power Symposium Pub Date : 1990-10-15 DOI: 10.1109/NAPS.1990.151362
H. Smolleck, R. C. Doyle, N. Prasad, R. Velasco, M. Hinrichs
{"title":"Microcomputer-based database management techniques for pulsed power and other system studies","authors":"H. Smolleck, R. C. Doyle, N. Prasad, R. Velasco, M. Hinrichs","doi":"10.1109/NAPS.1990.151362","DOIUrl":"https://doi.org/10.1109/NAPS.1990.151362","url":null,"abstract":"A microcomputer-based database management system developed to meet the objectives of database access and processing for certain analysis software is described. It uses a standard database management language to relate data for power flow, transient and dynamic analysis, bus reduction, and the electromagnetic transients program (EMTP) for large-system analysis. The authors demonstrate how such a sophisticated database manager can contribute to the efficient utilization of comprehensive application software in a large-system context, both for the present problem of pulsed loading analysis and for the larger context of power system analysis in general.<<ETX>>","PeriodicalId":330083,"journal":{"name":"Proceedings of the Twenty-Second Annual North American Power Symposium","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125619264","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
A spreadsheet model for residential magnetic field exposure 住宅磁场暴露的电子表格模型
Proceedings of the Twenty-Second Annual North American Power Symposium Pub Date : 1990-10-15 DOI: 10.1109/NAPS.1990.151377
J. Lamont, A. Mitchell, D. J. Slump
{"title":"A spreadsheet model for residential magnetic field exposure","authors":"J. Lamont, A. Mitchell, D. J. Slump","doi":"10.1109/NAPS.1990.151377","DOIUrl":"https://doi.org/10.1109/NAPS.1990.151377","url":null,"abstract":"A spreadsheet program to estimate individual magnetic field exposure within a residence is described. The magnetic field exposure (MFE) program allows utilities a quick means of determining the relative magnetic field exposure for a specific customer without an extended measurement process. Magnetic field exposure is defined as the amount of magnetic field a person is being subjected to over a specified time, expressed in milligauss-hours. One result of the MFE computation is a composite exposure index (CEI) which is defined as the total magnetic exposure received from all sources divided by the exposure period. The program is based on two accurate means of computing exposure for appliances and power lines. It divides the information into exposure groups to better display the large amount of data.<<ETX>>","PeriodicalId":330083,"journal":{"name":"Proceedings of the Twenty-Second Annual North American Power Symposium","volume":"304 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122723127","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
Study of transmission line magnetic fields 传输线磁场的研究
Proceedings of the Twenty-Second Annual North American Power Symposium Pub Date : 1990-10-15 DOI: 10.1109/NAPS.1990.151375
G.B. Iyyuni, S. Sebo
{"title":"Study of transmission line magnetic fields","authors":"G.B. Iyyuni, S. Sebo","doi":"10.1109/NAPS.1990.151375","DOIUrl":"https://doi.org/10.1109/NAPS.1990.151375","url":null,"abstract":"The authors present a review of magnetic field calculations associated with power frequency 3, 6, and 12-phase transmission lines. A computer program implemented using an IBM PC-XT is described briefly. The interactive program allows the user to calculate the two-dimensional electric and magnetic field parameters at any point near transmission lines. Plotting and mapping features are also available. To facilitate calculations, it is assumed that the transmission line conductors are straight, infinitely long, and parallel to each other and to the ground plane. Variations due to sag and tower effects are ignored. Given these assumptions, the calculation is a two-dimensional analysis, with lateral and vertical variations. Case studies related to magnetic fields are included.<<ETX>>","PeriodicalId":330083,"journal":{"name":"Proceedings of the Twenty-Second Annual North American Power Symposium","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123006140","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: 22
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