By Topic

Power Apparatus and Systems, IEEE Transactions on

Issue 6 • Date Nov. 1971

Filter Results

Displaying Results 1 - 25 of 57
  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Publication Year: 1971 , Page(s): c1 - 2822-x
    Save to Project icon | Request Permissions | PDF file iconPDF (1124 KB)  
    Freely Available from IEEE
  • IEEE Power Engineering Society

    Publication Year: 1971 , Page(s): c2
    Save to Project icon | Request Permissions | PDF file iconPDF (177 KB)  
    Freely Available from IEEE
  • Techniques for Improving the Control of Bulk Power Transfers on Interconnected Systems

    Publication Year: 1971 , Page(s): 2409 - 2419
    Cited by:  Papers (13)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2323 KB)  

    Criteria for achieving area net interchange and system frequency schedules with net interchange tie-line bias control in all areas of an interconnected system are briefly reviewed. Equations defining deviations from schedules, as well as consequent inadvertent interchange and time error accumulations when these criteria are not fulfilled, are derived. These lead to suggested control techniques based on adding, on a system wide basis, coordinated inadvertent interchange and time error correction factors to area control error computations. It is believed that such techniques would improve the control of bulk power transfers. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Power System Response to Frequency Transients

    Publication Year: 1971 , Page(s): 2420 - 2426
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1525 KB)  

    Frequency transients on electric power systems induce a response which is a complex function of system characteristics. This paper describes a digital data-gathering scheme and gives an analysis of the characteristic response obtained from a typical power system. Digital data-gathering permits analysis of transient response on a greatly expanded time scale and separation of the components for individual study. System response characteristics thus derived should contribute to improved power system control and stability when incorporated into on-line control computers. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Effects of Future Turbine-Generator Characteristics on Transient Stability

    Publication Year: 1971 , Page(s): 2427 - 2431
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (746 KB)  

    Future turbine-generator unit designs, particularly for the larger ratings, are expected to have greater generator reactances and lower unit inertias. Transient stability limits are determined for the future designs in terms of critical fault clearing times for faults on the high voltage transmission lines at the power plant substation. Transient stability limits of the future designs are compared with representative existing generating unit designs. Stability performance of future turbine-generator designs will be very similar to existing designs when considering their respective breaker failure (backup) relay system capabilities. Approximate gains in transient stability critical fault clearing times are also listed when applying various feasible stability control techniques. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Equivalent Circuits for a Short Circuited Transmission Line and Their Use in Circuit Breaker Testing

    Publication Year: 1971 , Page(s): 2432 - 2435
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1670 KB)  

    This paper covers the development of LC equivalent circuits for the simulation of a lossless short circuited transmission line. A total of eight different equivalent circuits are obtained through the application of circuit theory and residue calculus. Each of the circuits has its advantages and disadvantages depending upon the desired application. In this paper, the equivalent circuits are rated by their ability to simulate a short circuited transmission line in the testing of circuit breakers. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Single-Pole Switching on TVA'S Paradise-Davidson 500-KV Line Design Concepts and Staged Fault Test Results

    Publication Year: 1971 , Page(s): 2436 - 2450
    Cited by:  Papers (18)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (9792 KB)  

    Single-pole switching is selected for a radial 500-kV line which connects a l, 278-MVA generator into the transmission system. Line protective relays providing selective tripping and special compensation assisting with secondary arc current extinction are described. System planning criteria and design concepts for 500-kV single-pole switching are verified for the first time by staged fault tests conducted on an operating 500-kV system. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Travelling Wave Terminal Simulation by Equivalent Circuit

    Publication Year: 1971 , Page(s): 2451 - 2459
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1685 KB)  

    The implementation of a new three phase travelling wave program is discussed. The unique feature of this program is the use of Thevenin equivalent circuit for representation of line terminal conditions. This allows the use of linear or non-linear differential equations at any line terminal. A new shorthand matrix notation for balanced matrices is used to solve the terminal differential equation for an inductive termination. Parametric results are presented showing the influence of the transmission line X0/X1 on surge levels and effective line-to-ground surge impedance. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Theoretical Evaluation of Multiphase Propagation

    Publication Year: 1971 , Page(s): 2460 - 2471
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2464 KB)  

    The theoretical transient solution of multiphase transmission line propagation is reviewed by comparison of the Fourier and Laplace transform techniques applicable to this problem. The results show that the Fourier transform technique is more general, because it can include consideration of frequency dependent transmission line parameters and frequency dependent eigenvectors. The Laplace transform technique is applied to a lossy, completely transposed, transmission line using a new shorthand matrix notation for balanced matrices in the analysis. These results show that modal analysis canbe used in the balanced transmission line analysis. A discussion of possible simulation techniques are discussed and it is concluded that further work is required in this area to adequately incorporate attenuation and distortion on long duration switching surges. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An Optimal Linear Systems Approach to Load-Frequency Control

    Publication Year: 1971 , Page(s): 2472 - 2482
    Cited by:  Papers (25)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1672 KB)  

    The load-frequency control problem for interconnected systems is considered from the viewpoint of optimal stochastic system theory. A control algorithm is developed which provides improved power system performance in both large and small signal modes of operation. An especially attractive feature of the proposed control scheme is that it requires as inputs only the variables currently used, i. e., frequency deviations and scheduled interchange deviations. The classical two-area power system is used as a base system for comparative studies relating the response of an interconnected power system using the new control algorithm to the response obtained using conventional control strategy. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Power System Stability as Affected by Automatic Control of Generators-Some Methods of Analysis and Synthesis

    Publication Year: 1971 , Page(s): 2483 - 2487
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (901 KB)  

    This paper considers the problems of choosing the stabilizing structures of power system generators with forced excitation control reliably ensuring steady-state stability of the system operation. The synthesis method outlined for this purpose makes it possible to determine (with minimum stability calculations) both the generator operational condition parameters and the orders of their derivatives to be used for the control stabilization. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimisation of Voltage Regulator Gains by the D-Decomposition Technique For Best Steady State Stability

    Publication Year: 1971 , Page(s): 2488 - 2494
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1171 KB)  

    The paper applies the method of D-decomposition technique for optimizing the derivative gain settings of the excitation voltage regulators of a power station for best steady state stability condition, i. e. for maximum alternator stability and best transient response for small perturbations. A suitable digital program based on the D-decomposition technique has been written for a typical two-machine system to obtain the best values of the regulator derivative gains for different operating conditions of the system which are necessary for the future design of an on-line controlled AVR*. The nonlinear change of the derivative gain settings is also compared with the usual constant gain settings from stability limit and transient response aspects. The effect of several parameters such as the electro-mechanical transient process of the receiving-end system and certain AVR feed back signals e. g. the first and second derivatives of voltage and the proportional signal of current on the quality of transient response is also investigated. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Computational Algorithm for Real-Time Control of System Voltage and Reactive Power Part I - Problem Formulation

    Publication Year: 1971 , Page(s): 2495 - 2501
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1633 KB)  

    A new and efficient control scheme is proposed for the real-time control of system voltage and reactive power control and the conventional computational algorithms are reviewed from the point of view of on-line centralized control on a real-time basis. A simplified linear model describing the voltage and reactive power control characteristics is given which is conveniently constructed for the purpose of minimizing the transmission losses under the constraint of the voltage settling condition. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Computational Algorithm for Real-Time Control of System Voltage and Reactive Power Part II - Algorithm of Optimization

    Publication Year: 1971 , Page(s): 2502 - 2508
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1197 KB)  

    An efficient computational algorithm is presented for the real-time control of system voltage and reactive power on the basis of a simplified linear model. A modified version of the complex method of Box is used for the minimization of bus voltage deviation in the first phase of optimization and a numerical search technique for the reduction of transmission losses due to reactive power flows in the second phase. The numerical example for a sample practical system is also given. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A More Efficient Control Room Operator-Process Interface

    Publication Year: 1971 , Page(s): 2509 - 2516
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1664 KB)  

    This paper presents the results of a recent study sponsored by Philadelphia Electric Company. The primary objectives were to reduce the size of a typical Boiling Water Reactor (BWR) power plant control room and to provide a more efficient operator interface with the process. Conventional "hard-wired" instrumentation and computer-driven cathode ray tubes (CRTs) were used to implement the functional requirements in each of the four alternatives established for study. The results were conclusive indicating that the study objectives can be met within the realm of current technology. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fast Valving as an Aid to Power System Transient Stability and Prompt Resynchronization and Rapid Reload After Full Load Rejection

    Publication Year: 1971 , Page(s): 2517 - 2527
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1947 KB)  

    As steam turbine generator units increase in rating, their inertia constants tend to decrease and their reactance constants to increase, thus aggravating the power system transient stability problem. There is also a tendency for the complete unit to take longer to restart and reload when unscheduled disconnection from the system takes place. Counter measures are needed and may be available within the power plant. A study of these measures was made by the authors acting as a Working Group of NewEngland's NEPLAN Planning Committee's System Design Task Force. The paper presents the Working Group's findings as widely supported by the major utilities in New England. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Applications of Operator Aid Computers in Plants

    Publication Year: 1971 , Page(s): 2528 - 2533
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (929 KB)  

    Duke Power Company installs a plant computer for each new generating unit which is called an Operator Aid Computer. Application at Oconee Nuclear Station, which is Duke's first commercial nuclear station has required new functions. The differences in the application at Oconee and future nuclear stations are compared to the functions required at previous fossil- fired stations. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Use of Computers in Nuclear Fuel Management

    Publication Year: 1971 , Page(s): 2534 - 2539
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1187 KB)  

    In spite of licensing delays resulting from public concern over environmental effects, and notwithstanding sharply escalated manufacturing and construction costs, nuclear power appears to be a promising long term solution to the Nation's problem of electric power supply. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Load Flows by Hybrid Computation for Power System Operators

    Publication Year: 1971 , Page(s): 2540 - 2547
    Cited by:  Papers (2)  |  Patents (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1622 KB)  

    It is shown how hybrid computers formed from special- purpose analog modules and process-control- type digital computers can be used to solve power system load flows more rapidly than by digital computation alone. For a 181-bus system, a particular hybrid computer has been built that requires about 20 seconds for each solution as compared with 30 minutes for an all-digital solution with the same computer. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Control of Electromagnetic Forces on Stator Windings of Large Turbine-Generators

    Publication Year: 1971 , Page(s): 2548 - 2554
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (6513 KB)  

    In the past 20 years there has been a dramatic increase in kVA ratings of large turbine-generators, accompanied by a parallel increase in the electromagnetic forces acting on the stator windings. This has created an industry-wide problem of providing a stator winding support system which is capable of adequately restraining these forces to avoid impairment of machine reliability. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Experimental Determination of Exact Equivalent Circuit Parameters of Synchronous Machines

    Publication Year: 1971 , Page(s): 2555 - 2560
    Cited by:  Papers (16)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (779 KB)  

    For stability studies of large power systems, accurate representation of the synchronous machine is required. As pointed out by Canayl, the conventional equivalent circuits for synchronous machines do not give accurate computed field voltage and current values. He suggested several circuits and showed good agreement between his test and calculated results. His circuit parameters were calculated from design. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Nonlinear and Time-Varying Elements in Digital Simulation of Electromagnetic Transients

    Publication Year: 1971 , Page(s): 2561 - 2567
    Cited by:  Papers (59)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1375 KB)  

    Simulation programs for electromagnetic transients must provide models for lightning arresters, transformer saturation, circuit breakers and other nonlinear and time-varying effects. This paper describes techniques for keeping the solution time in networks with such elements as low as possible, by using the compensation method or network equivalents. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Conference Papers Open for Discussion

    Publication Year: 1971 , Page(s): 2567
    Save to Project icon | Request Permissions | PDF file iconPDF (91 KB)  
    Freely Available from IEEE
  • A Study of the Performance of Contaminated Insulators Under Various Test Conditions

    Publication Year: 1971 , Page(s): 2568 - 2576
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (5382 KB)  

    Two contamination test methods have been examined for the difference in assumptions used as the basis of each method. Dynamic surface impedance of insulators in a slow-wetting condition is remarkably influenced by the voltage across the insulator unit, which causes nonlinearity of insulation strength with insulator length. On the other hand, the surface condition can be represented as resistance in wet contaminant tests. This difference in surface condition naturally leads to disagreement in the results. It has been concluded to be of limited utility to discuss the order of merit for several insulators with different test methods, since any contamination method cannot simulate all aspects of this problem. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Survey of The Problem of Insulator Contamination in The United States and Canada-Part I

    Publication Year: 1971 , Page(s): 2577 - 2585
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (997 KB)  

    Because of the growing problem caused by insulator contamination due to both industrial pollution and natural deposits, a Working Group of the Lightning and Insulator Subcommittee was formed to study the problem. The first objective was to determine the extent of the problem in the U. S. and Canada, and to determine the various kinds of contaminants and the most severe weather conditions that cause transmission line outages. A survey was conducted by sending questionnaires to 90 utilities. A total of 309 case histories were reported. This report summarizes the answers to questions regarding contaminants and insulator types. It also sheds some light on the preventive measures most frequently undertaken by the utilities and the degree of success of each action. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

This Transactions ceased production in 1985. The current retitled publication is IEEE Transactions on Energy Conversion and IEEE Transactions on Power Delivery, and IEEE Transactions on Power Systems.

Full Aims & Scope