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IEEE Transactions on Power Apparatus and Systems

Issue 6 • Date June 1969

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Displaying Results 1 - 25 of 28
  • 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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    Freely Available from IEEE
  • Multicomputer Configurations and Diakoptics: Real Power Flow in Power Pools

    Publication Year: 1969, Page(s):789 - 796
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1672 KB)

    Techniques and methods are presented for conducting simplified power-flow calculations in power pools by employing the simultaneous computing capability of the computers in the separate areas of the pool. View full abstract»

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  • Monitoring Electric-Load Forecasts

    Publication Year: 1969, Page(s):797 - 801
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (948 KB)

    A program that compares substation summer peak-load forecasts with actual early summer loads which have been adjusted to normal summer peak weather conditions is described. The comparsion shows which forecasts appear low relative to the adjusted early summer loads. Used with substation capability, the results show which substations will become critically loaded sooner than present forecasts indica... View full abstract»

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  • Economic Scheduling of Generation for Planning Studies

    Publication Year: 1969, Page(s):801 - 804
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (767 KB)

    A procedure for determining economic schedules of generation for use in planning studies involving large systems is presented. These schedules are achieved by combining a load flow and dispatching routine with the calculation of incremental losses. The predominate feature is the technique used to calculate the incremental losses. Whereas previous methods required the inverse of the nodal admittanc... View full abstract»

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  • Economic Dispatch of Generation via Valve-Point Loading

    Publication Year: 1969, Page(s):805 - 811
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1516 KB)

    The valve-point loading logic described in this paper is intended to meet at any time in the most economical fashion a generation commitment. This objective is approached by insuring that as great a portion of the load as practicable will be carried by units loaded to valve points, that the remainder of the load will be carried by units reserved for regulation, and that in both categories the assi... View full abstract»

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  • An Underfrequency Relay with Frequency Decay Rate Compensation

    Publication Year: 1969, Page(s):812 - 820
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3101 KB)

    The development of a new type of solid-state protective relay which senses both frequency and rate-of-change of frequency is outlined. The design considerations and principles of operation of this relay are explained with respect to modern load reduction concepts. The theory of operation of the device and how it can be applied in an electric power system are discussed. Finally, possible future app... View full abstract»

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  • A Swing Relay for the East-West Intertie

    Publication Year: 1969, Page(s):821 - 825
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2193 KB)

    Closure of the ties to interconnect power systems across the continent has imposed new relaying problems for which new solutions have been developed. A special relay has been monitoring the East-West Intertie since it was reestablished December 3, 1967. It is designed to sense conditions of the interarea tie and to anticipate when interchange is approaching difficulty. Power, rate-of-change of pow... View full abstract»

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  • Waltz Mill 1100-kV Station: Conductor Selection and Laboratory Verification

    Publication Year: 1969, Page(s):825 - 833
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2931 KB)

    The 1100-kV Waltz Mill project is a research center being constructed to permit life testing of underground transmission systems. The selection and high-voltage laboratory verification of the 1100-kV bus conductors are described. A six-conductor bundle with a 2.5-inch subconductor was selected for the upper strain bus, and a four-conductor bundle having a 5-inch (IPS) subconductor was chosen for t... View full abstract»

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  • Underground Distribution System Design for Reliability

    Publication Year: 1969, Page(s):834 - 842
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1767 KB)

    The extent to which underground distribution systems are now being constructed and planned for the future necessitates identifying a preferred design consistent with present performance requirements and minimum cost objectives. This study analyzes many variations in design of a representative underground distribution circuit from these viewpoints. This analysis consists of a step-by-step procedure... View full abstract»

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  • Cooling of Distribution Transformers in Vented Underground Vaults

    Publication Year: 1969, Page(s):843 - 853
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4655 KB)

    The thermal performance of an instrumented distribution transformer in a vault was measured and compared for still air ambients and low-speed wind with various covers (grates and caps) and flow-control barriers and splitters. Correlations for free convection from the tank and vault as well as correlations of the thermal impedances due to air recirculation for various cover and flow-control designs... View full abstract»

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  • 500-kV AC Substation Design Criteria Summary of Industry Practices

    Publication Year: 1969, Page(s):854 - 861
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1428 KB)

    In order to determine major trends in 500-kV substation design practices, a survey was made of ten major electric utility systems in the United States and Canada. These findings are presented in tabular form for easy comparison of design features. Major variations in data are identified by an asterisk and are explained in the accompanying discussion following the tabulation. These data should be i... View full abstract»

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  • Contribution to the Measurement of the Impulse Withstand Voltage of Oil-Paper-Insulation Systems

    Publication Year: 1969, Page(s):862 - 868
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1309 KB)

    Impulse breakdown voltages of oil-paper-insulation systems show considerable scatter. Impulse withstand voltages associated with a certain low probability of breakdown can only be determined if the probability of breakdown as a function of the voltage is known. This probability function can be determined by means of test results. The test can be carried out on a series of about 20 simplified model... View full abstract»

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  • History and Design Parameters of High-Pressure Pipe-Type Cables in the Western Hemisphere Operating at 69 kV and Above

    Publication Year: 1969, Page(s):868 - 889
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3106 KB)

    The first high-pressure pipe-type cable in the Western Hemisphere operating at 69 kV and above was installed in 1932. At the present time there is in operation over 2000 circuit miles operating in the range of 69 to 345 kV. There are many utilities which will be installing this system for the first time and it is hoped that information contained in this paper will aid in selecting the type require... View full abstract»

    Freely Available from IEEE
  • Mica-Loaded Paper for EHV Power Cable

    Publication Year: 1969, Page(s):890 - 896
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2252 KB)

    The paper deals with mica-loaded kraft paper developed with the aim of applying it to the extra-high-voltage oil-filled (OF) cable and pipe-type OF cable and an outline of an experimental 275-kV OF cable containing mica-loaded kraft paper. View full abstract»

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  • Development of Liquid-Filled Type Cross-Linked Polyethylene Cable

    Publication Year: 1969, Page(s):897 - 904
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4769 KB)

    Cross-linked polyethylene is now being used for cables of higher and higher voltage. However, cross-linked polyethylene cables must have a considerable thickness of insulation, and efforts have been made to reduce it as far as possible. Research to attain further improvement in this respect has led to success in the development of a new type of power cable. This new type of cable is made by extrud... View full abstract»

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  • Electric Fields in the Vicinity of Lightning Strokes

    Publication Year: 1969, Page(s):904 - 910
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3847 KB)

    New data have been added to the information available on the electric fields during thunderstorms. The new data consist of records of the potential gradients that exist on the earth's surface in the vicinity of lightning strokes. Records have been obtained within 150-200 feet of known stroke locations. To the best of the authors' knowledge this has not been accomplished before. Based on the inform... View full abstract»

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  • Zero-Sequence Current Distribution Along Transmission Lines

    Publication Year: 1969, Page(s):910 - 919
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1779 KB)

    The zero-sequence current distribution among ground wires and the ground-return path of overhead transmission lines is subject to change in the vicinity of a ground fault and the feeding point. This paper introduces the concepts used in connection with the end-effect phenomena of transmission lines and describes the necessity for solving the end-effect current distribution. After dealing with the ... View full abstract»

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  • Switching Surges on Northern States Power Company's 345-kV Circuits

    Publication Year: 1969, Page(s):919 - 931
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4756 KB)

    This paper reports the results of field tests conducted on the Northern States Power Company's 345-kV transmission system which investigated the effects of various system switching operations on transient overvoltages. Following the field tests a transient network analyzer was used to duplicate the field tests and then explore the maximum switching transients which system parameters could produce. View full abstract»

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  • Theory of Bundle Conductors

    Publication Year: 1969, Page(s):932 - 936
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (942 KB)

    The approaching possibilities of construction of 1000- 1500-kV ac power transmission, together with the extensive introduction of 330-750-kV transmission provide good grounds for a timely statement of the problem of optimization of the conductor design for EHV lines. View full abstract»

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  • Conference papers open for discussion

    Publication Year: 1969, Page(s): 936
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    Freely Available from IEEE
  • Circuit Theory of Reluctance Machines: Part I

    Publication Year: 1969, Page(s):937 - 944
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1154 KB)

    The purpose of this paper is to study the effect of incorporating a dc exciting winding on the stator of a reluctance machine which also carries the phase windings. From the normal analysis of a generalized model of a rotating machine, it is possible to conclude that two types of synchronous machines are possible: 1) when the periodicities of the stator phase and field windings are the same and th... View full abstract»

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  • Circuit Theory of Reluctance Machines: Part II

    Publication Year: 1969, Page(s):944 - 954
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1496 KB)

    The purpose of this paper is to establish formal d-q rotating real transformation equations for the synchronous operation of a class of reluctance machines provided with a dc exciting winding on the stator; and similar transformation equations for asynchronous operation of those machines with two orthogonal axes ¿, ßfixed on the stator or rotating along with the rotor. In synchronous operation t... View full abstract»

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  • An Analysis of the Hysteresis Motor Part III: Parasitic Losses

    Publication Year: 1969, Page(s):954 - 961
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1262 KB)

    A major constraint on the performance prediction of a hysteresis machine arises from the parasitic losses associated with the rotor magnetic material. These losses can be high enough to absorb much of the developed torque, particularly for small sizes and large numbers of poles. In this paper the phenomena which cause parasitic losses are examined in detail. Analytical expressions are developed to... View full abstract»

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  • Analysis and Simplified Representations of Rectifier - Inverter Reluctance-Synchronous Motor Drives

    Publication Year: 1969, Page(s):962 - 970
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1664 KB)

    Methods of analyzing six-step and pulse-width- modulated (PWM) types of rectifier-inverter reluctance-synchronous motor drive systems are set forth. In this development the harmonic components due to the switching of the rectifier are neglected, and the operation of the inverter is expressed in a reference frame rotating in synchronism with the fundamental frequency of the inverter output voltages... 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