The use of digital computers for power system protection and control has been studied for the past decade. However, economic considerations, reliability problems, and system constraints have prohibited the actual use of computers in substation protection schemes. Recent advances in microcomputer technology have provided power system protection engineers with a new tool. A distributed microcomputer protection scheme is introduced and compared to present substation protection techniques. Speed, reliability, and operating advantages as well as the adaptive control possibilities of the proposed system are pursued.
{"title":"Application of microcomputers to the protection and control of power system substations","authors":"B. Russell","doi":"10.1109/CDC.1975.270571","DOIUrl":"https://doi.org/10.1109/CDC.1975.270571","url":null,"abstract":"The use of digital computers for power system protection and control has been studied for the past decade. However, economic considerations, reliability problems, and system constraints have prohibited the actual use of computers in substation protection schemes. Recent advances in microcomputer technology have provided power system protection engineers with a new tool. A distributed microcomputer protection scheme is introduced and compared to present substation protection techniques. Speed, reliability, and operating advantages as well as the adaptive control possibilities of the proposed system are pursued.","PeriodicalId":164707,"journal":{"name":"1975 IEEE Conference on Decision and Control including the 14th Symposium on Adaptive Processes","volume":"326 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124605479","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}
A survey of the criteria of stability used in the power system transient stability problem is made. The status of progress in the use of these methods is given, and the areas of difficulty are outlined.
综述了电力系统暂态稳定问题中常用的稳定判据。文中给出了使用这些方法的进展情况，并概述了困难的领域。
{"title":"Transient stability criteria","authors":"A. Fouad","doi":"10.1109/CDC.1975.270698","DOIUrl":"https://doi.org/10.1109/CDC.1975.270698","url":null,"abstract":"A survey of the criteria of stability used in the power system transient stability problem is made. The status of progress in the use of these methods is given, and the areas of difficulty are outlined.","PeriodicalId":164707,"journal":{"name":"1975 IEEE Conference on Decision and Control including the 14th Symposium on Adaptive Processes","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130869346","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}
General linear-quadratic singular variational problems with free end-point are examined. Procedures are given for establishing whether a prescribed problem has a solution, and for computing the optimal performance index and optimal controls when these exist.
{"title":"A solution to the linear-quadratic singular control problem","authors":"D. Clements, B. O. Anderson","doi":"10.1109/CDC.1975.270631","DOIUrl":"https://doi.org/10.1109/CDC.1975.270631","url":null,"abstract":"General linear-quadratic singular variational problems with free end-point are examined. Procedures are given for establishing whether a prescribed problem has a solution, and for computing the optimal performance index and optimal controls when these exist.","PeriodicalId":164707,"journal":{"name":"1975 IEEE Conference on Decision and Control including the 14th Symposium on Adaptive Processes","volume":"68 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120982616","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}
The Riccati equation plays an equally important role in scattering theory as in linear least-squares estimation theory. However, in the scattering literature, a somewhat different framework of treating the Riccati equation has been developed. We show that this framework is very appropriate also for estimation problems, and that it enables us to give simple derivatitions of known results as well as to obtain several new results. Examples include the derivation of backwards equations to solve forwards Riccati equations; an analysis of the asymptotic behavior of the Riccati equation; the derivation of backwards Markovian representations of stochastic processes; and new derivations and new insights into the Chandrasekhar and related Levinson and Cholesky equations.
{"title":"Scattering theory and linear least squares estimation: Part I: Continuous-time problems","authors":"L. Ljung, T. Kailath, B. Friedlander","doi":"10.1109/CDC.1975.270647","DOIUrl":"https://doi.org/10.1109/CDC.1975.270647","url":null,"abstract":"The Riccati equation plays an equally important role in scattering theory as in linear least-squares estimation theory. However, in the scattering literature, a somewhat different framework of treating the Riccati equation has been developed. We show that this framework is very appropriate also for estimation problems, and that it enables us to give simple derivatitions of known results as well as to obtain several new results. Examples include the derivation of backwards equations to solve forwards Riccati equations; an analysis of the asymptotic behavior of the Riccati equation; the derivation of backwards Markovian representations of stochastic processes; and new derivations and new insights into the Chandrasekhar and related Levinson and Cholesky equations.","PeriodicalId":164707,"journal":{"name":"1975 IEEE Conference on Decision and Control including the 14th Symposium on Adaptive Processes","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121260646","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}
The optimal control problem for distributed parameter systems with control applications to the coefficient matrices is formulated. A procedure for solving this problem and the necessary conditions for optimal coefficient controls resulting from the variational technique are given. The optimal coefficient distributed and boundary controls are characterized by the solution of a two-point boundary value problem.
{"title":"Optimal coefficient control of distributed parameter systems","authors":"Kwang Y. Lee","doi":"10.1109/CDC.1975.270711","DOIUrl":"https://doi.org/10.1109/CDC.1975.270711","url":null,"abstract":"The optimal control problem for distributed parameter systems with control applications to the coefficient matrices is formulated. A procedure for solving this problem and the necessary conditions for optimal coefficient controls resulting from the variational technique are given. The optimal coefficient distributed and boundary controls are characterized by the solution of a two-point boundary value problem.","PeriodicalId":164707,"journal":{"name":"1975 IEEE Conference on Decision and Control including the 14th Symposium on Adaptive Processes","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121434318","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}
A general sufficient condition for global optimality in terms of inequalities between the functions involved in the definition of the problem is developed. This condition is an extension of the sufficient condition obtained by Leitmann and Stalford [6] and can handle problems with constraints on the control and/or the state as well as problems with free final time. Simplified forms are obtained for the particular cases of minimum time and fixed final time problems. Simple examples which illustrate the applicability of the condition to problems with several extremal solutions and/or singular subarcs are also presented.
{"title":"Sufficient conditions for free final time optimal control problems","authors":"P. Mereau, W. Powers","doi":"10.1109/CDC.1975.270643","DOIUrl":"https://doi.org/10.1109/CDC.1975.270643","url":null,"abstract":"A general sufficient condition for global optimality in terms of inequalities between the functions involved in the definition of the problem is developed. This condition is an extension of the sufficient condition obtained by Leitmann and Stalford [6] and can handle problems with constraints on the control and/or the state as well as problems with free final time. Simplified forms are obtained for the particular cases of minimum time and fixed final time problems. Simple examples which illustrate the applicability of the condition to problems with several extremal solutions and/or singular subarcs are also presented.","PeriodicalId":164707,"journal":{"name":"1975 IEEE Conference on Decision and Control including the 14th Symposium on Adaptive Processes","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121025085","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}
Computer model SCOT (Simulation of COrridor Traffic) is a traffic engineering tool which simulates traffic flow through an urban freeway corridor network. It contains equations which describe the way vehicles are driven on freeways and streets and takes into consideration the field site geometry, traffic demand and control system. In this study, the capabilities of the model to simulate ramp control and to route traffic through the network along time minimal paths were investigated. Numerical values for standard traffic performance measures showed the improvement to freeway traffic flow caused by ramp metering as well as the resulting ramp congestion. The computed optimal traffic assignment showed that significant changes in the distribution of traffic could occur if drivers were given timely information.
计算机模型SCOT (Simulation of COrridor Traffic)是一种模拟城市高速公路廊道网络交通流的交通工程工具。它包含描述车辆在高速公路和街道上行驶方式的方程，并考虑了现场的几何形状、交通需求和控制系统。在这项研究中，模型的能力，模拟匝道控制和路由的交通通过网络沿时间最小路径进行了研究。标准交通性能指标的数值显示了匝道计量对高速公路交通流的改善以及由此产生的匝道拥堵。计算出的最优交通分配结果表明，如果给驾驶员及时的信息，交通分配会发生显著的变化。
{"title":"Simulation of traffic control strategies","authors":"A. Muzyka, D. Schmieder","doi":"10.1109/CDC.1975.270594","DOIUrl":"https://doi.org/10.1109/CDC.1975.270594","url":null,"abstract":"Computer model SCOT (Simulation of COrridor Traffic) is a traffic engineering tool which simulates traffic flow through an urban freeway corridor network. It contains equations which describe the way vehicles are driven on freeways and streets and takes into consideration the field site geometry, traffic demand and control system. In this study, the capabilities of the model to simulate ramp control and to route traffic through the network along time minimal paths were investigated. Numerical values for standard traffic performance measures showed the improvement to freeway traffic flow caused by ramp metering as well as the resulting ramp congestion. The computed optimal traffic assignment showed that significant changes in the distribution of traffic could occur if drivers were given timely information.","PeriodicalId":164707,"journal":{"name":"1975 IEEE Conference on Decision and Control including the 14th Symposium on Adaptive Processes","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127711819","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}
This paper reports results obtained in an evaluation study of model-tracking parameter identification for the optimally controlled CH-47 helicopter while in flight. The model is made to track some of the helicopter parameters by means of Liapunov-designed adaptive algorithm. The topics investigated include the accuracy of identification of the time-varying vehicle and the effect of controller feedback upon the performance of the identifier.
{"title":"Application to Liapunov model-tracking parameter identification for the CH-47 helicopter","authors":"R. Carroll","doi":"10.1109/CDC.1975.270625","DOIUrl":"https://doi.org/10.1109/CDC.1975.270625","url":null,"abstract":"This paper reports results obtained in an evaluation study of model-tracking parameter identification for the optimally controlled CH-47 helicopter while in flight. The model is made to track some of the helicopter parameters by means of Liapunov-designed adaptive algorithm. The topics investigated include the accuracy of identification of the time-varying vehicle and the effect of controller feedback upon the performance of the identifier.","PeriodicalId":164707,"journal":{"name":"1975 IEEE Conference on Decision and Control including the 14th Symposium on Adaptive Processes","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131223577","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}
{"title":"The modeling of dynamical processes","authors":"H. Kwatny, V. Mablekos","doi":"10.1109/CDC.1975.270694","DOIUrl":"https://doi.org/10.1109/CDC.1975.270694","url":null,"abstract":"","PeriodicalId":164707,"journal":{"name":"1975 IEEE Conference on Decision and Control including the 14th Symposium on Adaptive Processes","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127972017","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}
The performance of Bayesian maximum a posteriori (MAP) decision methods for dynamic system identification is investigated. By examining a finite set of a posteriori probabilities a decision is made as to which of several possible regions of the parameter space the true parameter value lies. It is shown that for the true parameter value in a prescribed region the corresponding a posteriori probability converges exponentially (mean square) to 1. The analysis is based on the asymptotic per sample formula for the Kullback information function, which is derived in this paper. We believe that the properties of Bayesian MAP decision methods discussed in this paper make them useful for application in dynamic system identification in conjunction with standard techniques such as the maximum likelihood (ML) method.
{"title":"Decision methods in dynamic system identification","authors":"J. Moore, R. Hawkes","doi":"10.1109/CDC.1975.270585","DOIUrl":"https://doi.org/10.1109/CDC.1975.270585","url":null,"abstract":"The performance of Bayesian maximum a posteriori (MAP) decision methods for dynamic system identification is investigated. By examining a finite set of a posteriori probabilities a decision is made as to which of several possible regions of the parameter space the true parameter value lies. It is shown that for the true parameter value in a prescribed region the corresponding a posteriori probability converges exponentially (mean square) to 1. The analysis is based on the asymptotic per sample formula for the Kullback information function, which is derived in this paper. We believe that the properties of Bayesian MAP decision methods discussed in this paper make them useful for application in dynamic system identification in conjunction with standard techniques such as the maximum likelihood (ML) method.","PeriodicalId":164707,"journal":{"name":"1975 IEEE Conference on Decision and Control including the 14th Symposium on Adaptive Processes","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129341253","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}
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