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IEEE Transactions on Power Apparatus and Systems

Issue 3 • Date March 1968

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Displaying Results 1 - 25 of 42
  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Publication Year: 1968, Page(s): c1
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    Freely Available from IEEE
  • IEEE Power Group

    Publication Year: 1968, Page(s): c2
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  • News

    Publication Year: 1968, Page(s):1a - 2a
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    Freely Available from IEEE
  • Conference papers open for discussion

    Publication Year: 1968, Page(s): 2a
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  • Characteristics of an Adjustable Speed Polyphase Induction Machine

    Publication Year: 1968, Page(s):613 - 624
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1946 KB)

    Variable frequency stepped-voltage wav eforms generated by an SCR bridge-inverter are used to drive a 3-phase induction motor. The system coefficient matrix associated with the volt- ampere differential equations of a polyphase induction machine is cyclic symmetric about its major diagonal axis. A basic property of this type of matrix is that it can be diagonalized by a transformation of variables... View full abstract»

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  • Polyphase Induction Motor Performance and Losses on Nonsinusoidal Voltage Sources

    Publication Year: 1968, Page(s):624 - 631
    Cited by:  Papers (97)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1657 KB)

    Induction motors excited with static frequency converters almost invariably are subjected to nonsinusoidal voltage waveforms, and the presence of time harmonics in the applied voltage results in currents at the harmonic frequencies. These currents result in additional and sometimes rather large losses. A method for calculating these harmonic currents and losses is presented, and experimental data ... View full abstract»

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  • Modeling a Four Electric Machine System on Analog Using Parameters Directly Determined from Tests

    Publication Year: 1968, Page(s):632 - 641
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1351 KB)

    Neither the analog study of electric machines[1]-[4] nor the modeling technique in feedback control systems is new. However, modeling a multimachine system with parameters directly determined from tests and checking the steady-state and transient performances from analog studies with those from actual machine tests are very complicated but indispensable for complete modeling. View full abstract»

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  • Methods of Stabilizing a Reluctance- Synchronous Machine

    Publication Year: 1968, Page(s):641 - 649
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1728 KB)

    In an earlier paper it was shown that machine instability might occur when a reluctance-synchronous machine is operated at low speeds (low frequencies). In this paper, several methods of stabilizing a reluctance-synchronous machine during operation at low speeds are presented. The basis of the stabilizing technique is established by employing the theory of small displacements to show that system d... View full abstract»

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  • Possibility of Using a Homopolar Generator as a Pulse Generator

    Publication Year: 1968, Page(s):650 - 655
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (907 KB)

    A homopolar machine has been analyzed to ascertain whether it is possible to use it as a high-current, low-voltage pulse generator. A transient expression for the field flux has been deduced and the time constant determined. The effect of the eddy currents produced in the solid metal body of the machine has been included and an expression for the flux density due to eddy currents has been deduced,... View full abstract»

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  • Homopolar Generator Effect of Sudden Short Circuit

    Publication Year: 1968, Page(s):655 - 659
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (812 KB)

    The effect of a sudden short circuit on a homopolar generator is analyzed and the transient time constant is deduced. The effect of nonuniform air gap flux is considered. It is shown that the time constant of a machine with a very small air gap and thick cylinder is quite large, while the time constant of a thin cylinder machine with a larger air gap is small. View full abstract»

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  • Combination and Separation of Coordinates and Modular Programming for DC Machine Fields

    Publication Year: 1968, Page(s):659 - 664
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1118 KB)

    The consideration of slotting in the armatures of dc machines increases the number of grid points to be considered beyond the capacity of normally available computers. To reduce the memory storage, a combination coordinate system characteristic to the parts of the lamination is proposed. To satisfy a large number of boundary conditions, a scheme is described to separate the rotor and stator lattic... View full abstract»

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  • Representation of the Magnetization Characteristic of DC Machines for Computer Use

    Publication Year: 1968, Page(s):665 - 669
    Cited by:  Papers (63)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (883 KB)

    The calculation of flux densities in dc machines using digital computers requires a representation of the magnetization curve of the materials either as H = f1(B) or B = f2(H). A figure of merit of the approximation is defined. The representation can be achieved by the use of simple algebraic or transcendental functions. For satisfactory fit, however, the B-H characteristic has to be subdivided in... View full abstract»

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  • A Turn Insulation Test for Stator Coils

    Publication Year: 1968, Page(s):669 - 678
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6132 KB)

    Normally applied maintenance tests do not evaluate the condition of insulation between the turns of generator coils. The existing standards recommend neither methods of turn insulation testing nor values of voltage for testing turn insulation. This situation exists in part because of the difficulty in applying a proper test voltage to the turns without overstressing the ground insulation. Occasion... View full abstract»

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  • Bibliography of Rotating Electric Machinery for 1962-1965

    Publication Year: 1968, Page(s):679 - 689
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2272 KB)

    This paper supplements two previous bibliographies on rotating electric machinery. View full abstract»

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  • Telecommunications for HVDC Transmission

    Publication Year: 1968, Page(s):690 - 695
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1384 KB)

    The control and operational principles of HVDC transmission are briefly reviewed. Basically no telecommunication is necessary for operation, with the exception of telephone connections. As the demand for service and system control increases, telecommunication requirements will grow. General requirements of telecommunications are summarized and specific requirements regarding signal speed and volum... View full abstract»

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  • Analytical Determination of High-Frequency Propagation on Ice-Covered Power Lines

    Publication Year: 1968, Page(s):695 - 703
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2780 KB)

    Propagation of high-frequency signals along a power line is adversely affected by deposits of ice or hoarfrost on the conductors. A difficulty arises in the application of conventional modal analysis to a study of the effects of ice on propagation since the lossy ice layer forms a discontinuity at its surface with the lossless air. An analytical method to eliminate this difficulty is proposed, bas... View full abstract»

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  • Contamination Testing of Arresters for 500-kV Systems

    Publication Year: 1968, Page(s):703 - 712
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5440 KB)

    The effects of external surface contaminants and moisture on the internal sparkover of lightning arresters is of prime concern in the design of extra high voltage (EHV) stations. This paper describes the design and acceptance sparkover and contamination tests performed on several different ratings of a multiunit arrester designed specifically for use on 500-kV systems. The sparkover characteristic... View full abstract»

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  • Impulse, Switching Surge, and 60-Hz Sparkover Tests by Three Laboratories on a 500-kY Ring-to-Rod Protective Gap

    Publication Year: 1968, Page(s):713 - 721
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1699 KB)

    The objective is to promote a better understanding of protective gaps, their characteristics, influence of design factors on perfornance, applications, and limitations. Accordingly, the Working Group sponsored sparkover tests on a proposed 500-kV ring-to-rod protective gap. Comparative tests were conducted at laboratories of the Ohio Brass Company, the Hydro-Electric Power Commission of Ontario, a... View full abstract»

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  • Voltage Acceleration - A Basic Measure of Severity of Oscillatory Transient Recovery Voltage

    Publication Year: 1968, Page(s):721 - 728
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2921 KB)

    Difficulty of ac circuit interruption is influenced by the time-function of the rise of transient recovery voltage (TRV) across the interrupting device following interruption. It has been common practice to express the severity (steepness) of this time-function in terms of rate of rise of the voltage. However, this approach is not definitive when applied to the initial portion of the displaced-cos... View full abstract»

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  • Japanese Method of Artificial Pollution Tests on Insulators

    Publication Year: 1968, Page(s):729 - 735
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2577 KB)

    Salt pollution on outdoor insulators has been a serious problem in Japan, and steady efforts have been made to prevent flashover faults on polluted insulators. As a part of such efforts, a simple method of artificial pollution test has been developed to evaluate the flashover characteristics of polluted insulators, especially those with large dimensions. In this test, a salt solution of various co... View full abstract»

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  • The Accurate Calculation of Skin Effect in Conductors of Complicated Shape

    Publication Year: 1968, Page(s):735 - 742
    Cited by:  Papers (34)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1796 KB)

    Skin-effect behavior of long straight conductors of complicated cross-sectional shape may be predicted using the recently developed modal theory of current flow. Practical use of this method presupposes that suitable numerical techniques can be found to allow adequate accuracy to be attained without excessive use of computer time. A digital computer program is described that achieves this purpose ... View full abstract»

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  • SF6 Magnetic-Puffer Circuit Breaker for 34.5 kV, 1500 MVA

    Publication Year: 1968, Page(s):742 - 749
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6215 KB)

    A circuit breaker of a new type has been developed as the removable breaker element for metal-clad switchgear for 23/34.5 kV service. It is a single pressure, dead-tank SF6 circuit breaker which employs magnetic driving action produced by the fault current to drive the gas through the arc to interrupt it. Complete development tests have been performed, as required by applicable standards, as well ... View full abstract»

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  • The Short-Circuit Rating of Thin Metal Tape Cable Shields

    Publication Year: 1968, Page(s):749 - 759
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3531 KB)

    It is pointed out that conventional methods of calculating the short-circuit ratings of cable conductors can lead to gross errors in the case of the thin metal tape shields commonly used in plastic-insulated cables. A more rigorous treatment of the problem is developed for both single and repeated short circuits. The theoretical calculations are compared with the results of a series of practical t... View full abstract»

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  • Corona Resistance of Materials

    Publication Year: 1968, Page(s):759 - 764
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3633 KB)

    A simplified layer type coil specimen was used to evaluate the corona resistance of flexible sheet insulation, magnet wire insulation, and varnishes. Tests were made at 110°C with 60-Hz voltage applied to the specimen. The test specimen was shown to be reproducible. The testing procedure is repeatable, and it does permit comparison of the corona resistance of materials and matenal systems. View full abstract»

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  • Solid-State, High-Speed Phase-Comparison Relay Based on Zero Crossings: I - Theory

    Publication Year: 1968, Page(s):764 - 770
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1492 KB)

    A relay scheme has been developed based on the instantaneous phase current zero crossings. Transient and steady- state unbalances will produce shifts of the phase currents, therefore measurement of the deviation of successive zero crossings from 60 degrees leads to six possible fault indications per cycle. Comparison of the deviation magnitude at either end of a relay zone can be used to locate th... View full abstract»

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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