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IEEE Transactions on Power Apparatus and Systems

Issue 11 • Date Nov. 1969

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Displaying Results 1 - 22 of 22
  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Publication Year: 1969, Page(s): c1
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    Freely Available from IEEE
  • IEEE Power Group

    Publication Year: 1969, Page(s): c2
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  • Unbalanced Operations of Three-Phase Machines with Damper Circuits

    Publication Year: 1969, Page(s):1585 - 1593
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1446 KB)

    A study on unbalanced short circuits of three-phase machines with additional field circuits is discussed, and a detailed solution for the case of a double-line-to-ground short circuit of a salient-pole synchrenous machine is offered. By mathematical analysis, new and complete transient solutions for short-circuit currents, torque, and open-phase voltage are derived for ready uses. View full abstract»

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  • Recommended Phasor Diagram for Synchronous Machines

    Publication Year: 1969, Page(s):1593 - 1610
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3757 KB)

    A phasor diagram for excited-field synchronous machines is recommended for adoption by USASI and IEC. The diagram and the choice of direct and quadrature axes are defined so that the laws of induced voltages are expressed in "natural" form. The recommended diagram overcomes certain apparent inconsistencies in the phasor diagram in USASI Standard C42.10-1957. View full abstract»

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  • Calculation and Testing of Damper-Winding Current Distribution in a Synchronous Machine with Salient Poles

    Publication Year: 1969, Page(s):1611 - 1619
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2616 KB)

    Damper-bar currents of a synchronous machine induced during transient asynchronous operation are studied in this paper. Experimental and mathematical methods are used in analyzing an actual synchronous machine. Results of calculations and measurements are presented and compared. All analyses are carried out both for the synchronous machine with a squirrel cage and with a grill (open end rings). View full abstract»

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  • The Quadrature-Axis Equivalent Circuit of the Synchronous Machine with a Grill

    Publication Year: 1969, Page(s):1620 - 1624
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    The complete equivalent circuits of a synchronous machine with a grill (open end rings) are analyzed. Because the direct-axis equivalent circuits for both the squirrel-cage and the grill machines are the same and are well known, the paper develops only the quadrature-axis equivalent circuit for a machine with a grill. View full abstract»

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  • A Digital Model for Three-Phase Induction Machines

    Publication Year: 1969, Page(s):1624 - 1634
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1684 KB)

    A digital model for a three-phase induction machine is developed, which is particularly adapted for studying its dynamic performance when fed from an inverter. Conventionally, the induction motor is analyzed in terms of its d-q variables, while the operation of the inverter generally needs continuous monitoring of the state of its phase quantities. Thus in a study of the composite inverter-inducti... View full abstract»

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  • Method of Multiple Reference Frames Applied to the Analysis of a Rectifier - Inverter Induction Motor Drive

    Publication Year: 1969, Page(s):1635 - 1641
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1074 KB)

    The method of multiple reference frames and the equations of transformation of the inverter are employed to establish a method of calculating the inverter current in a rectifier - inverter drive system. Since the method of multiple reference frames does not use phasors or complex impedances, the calculation of the inverter current is simple and direct. Also presented is a method of approximating t... View full abstract»

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  • Double-Armature Polyphase Synchronous Generator with Capacitive Excitation

    Publication Year: 1969, Page(s):1642 - 1646
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (900 KB)

    An experimental study of a capacitively excited synchronous machine having armature windings on both rotor and stator is discussed. Voltage regulation, efficiency, and power output data show the machine to be a compact, high-energy density, low-impedance source of electric energy. Effects of unbalanced resistive load and magnetic saturation are illustrated. Voltage regulation of 10 percent and ele... View full abstract»

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  • Magnetic Fields, Eddy Currents, and Losses, Taking the Variable Permeability into Account

    Publication Year: 1969, Page(s):1646 - 1657
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2134 KB)

    An analog method is described in which a network, consisting of semiconductor diodes, capacitors, and resistors, is used to solve the partial differential equations. The magnetization curves of electrical sheet steels and solid iron are simulated to a high degree of accuracy by specially selected silicon zener diodes. With constant permeability any two-dimensional region, consisting of solid or la... View full abstract»

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  • A Probability Simulation Method for Determining the Reliability of Switching Stations

    Publication Year: 1969, Page(s):1657 - 1664
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1360 KB)

    A useful treatment of as broad a class of such reliability problems of switching stations and substations as can be treated by the theory of Markov processes is covered. The mechanics of failure and repair effects are discussed by means of mathematical models, and basic members with memory, fluctuating failure, and repair rates are evaluated. The system is assumed to operate under normal and storm... View full abstract»

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  • Generalization of the Normalization (Per-Unit) Technique

    Publication Year: 1969, Page(s):1665 - 1672
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1367 KB)

    This paper presents a generalization of the normalization (per-unit) technique. The introduction of a region graph with its associated tree and cotree, a form of network equations designated as a primary system and some properties of matrix triple products, makes it possible to develop this normalization theory in a broad and mathematically rigorous form. Particular attention is paid to nominal no... View full abstract»

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  • Effect of Conductor Imbalance on Flexible Transmission Structures

    Publication Year: 1969, Page(s):1672 - 1678
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1554 KB)

    Methods of determining longitudinal tensions to be supported by flexible transmission structures, such as tubular steel poles, A frames, H frames, and similar two-dimensional structures, as a result of phase severance, or similar imbalance in one span of a series, are outlined. Tension reduction caused by insulator displacement plus the consequent structure deflection is determined. View full abstract»

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  • Dynamic Strain Distribution on Loaded Stranded Cables

    Publication Year: 1969, Page(s):1678 - 1690
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4801 KB)

    The correlation which exists between the dynamic strains occurring in span and those occurring at the rigidly clamped extremities on vibrating taut circular beams is shown. The way wire slippage, occurring on real loaded stranded cables, will reduce the dynamic strains and contribute to the cable's internal damping is also illustrated. View full abstract»

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  • Creep Studies of Aluminum Conductor Alloys

    Publication Year: 1969, Page(s):1690 - 1695
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2609 KB)

    The results of a comprehensive laboratory test program on the creep characteristics of EC-H19, 5005-H19, and 6201- T81 aluminum alloy conductor wires are presented. Creep curves for those alloys are illustrated over a stress range of 15 to 25 percent minimum average strengths and a temperature range of 25 to 100°C. The importance of creep history as a function of total creep at any time and tempe... View full abstract»

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  • Effects of Axial Slits on the Performance of Induction Machines with Solid Iron Rotors

    Publication Year: 1969, Page(s):1695 - 1709
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2915 KB)

    The paper deals with the improvement in the performance of an induction machine with a solid iron rotor slitted axially. The improvement is observed mainly in the full-load slip, the power factor, and the starting torque. In this paper, a one- dimensional model of a slitted rotor is presented based on the original and novel concept that the tooth and slit profile is a flux line. Based on this, the... View full abstract»

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  • Stability Analysis of a Symmetrical Induction Machine

    Publication Year: 1969, Page(s):1710 - 1717
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1376 KB)

    A stability study of an induction machine is performed by applying the root-locus criterion to the equations which describe the behavior of the machine during small displacements about a steady-state operating point. This investigation reveals that a symmetrical induction machine may become unstable at low speeds (low frequencies) even though balanced, constant amplitude, sinusoidal voltages are a... View full abstract»

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  • Design Aspects of Three-Phase Inductor Alternators

    Publication Year: 1969, Page(s):1718 - 1724
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2061 KB)

    A design procedure for the three-phase heteropolar type of inductor alternator has been worked out. Expressions for open-circuit-voltage direct- and quadrature-axis reactances of arnature reaction, short-circuit characteristic, and the power output of this type of alternator have also been developed. The stator leakage reactance, which is an important parameter in the design and operation of such ... View full abstract»

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  • Inductance Coefficients of Three-Phase Inductor Alternators: Part I - Analytical Study

    Publication Year: 1969, Page(s):1725 - 1730
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (851 KB)

    The paper develops expressions for various inductance coefficients of three-phase inductor alternators on the basis of a harmonic permeance distribution in the air gap. These expressions involve harmonics in the MMF distribution of the armature windings and also harmonics in the permeance distribution due to the non- uniform air gap. The analysis shows that, when the armature carries current, both... View full abstract»

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  • Inductance Coefficients of Three-Phase Inductor Alternators: Part II - Numerical and Experimental Results

    Publication Year: 1969, Page(s):1731 - 1736
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1091 KB)

    In this paper, the various inductance coefficients of three-phase inductor alternators have been theoretically calculated and compared with the results obtained from a test performed on the alternator. The results obtained from the test show a general agreement with the theory derived in [1]. The inductor alternators with an odd number of rotor teeth are found to be similar to ordinary synchronous... View full abstract»

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  • Startup of San Onofre

    Publication Year: 1969, Page(s):1736 - 1738
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (769 KB)

    The startup activities of the San Onofre Nuclear Generating Station, Unit, 1 are covered. The tests during startup reveal component design deficiencies, system design deficiencies, and discrepancies in plant operating instructions. Resolution of these deficiencies are important to the proper operation of this plant and the design of future plants. View full abstract»

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  • Contributors

    Publication Year: 1969, Page(s):1739 - 1740
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    Freely Available from IEEE

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