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Power Apparatus and Systems, IEEE Transactions on

Issue 3 • Date March 1966

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  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Publication Year: 1966 , Page(s): c1
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  • IEEE Power Group

    Publication Year: 1966 , Page(s): c2
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  • IEEE News

    Publication Year: 1966 , Page(s): 1a - 4a
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  • Power News

    Publication Year: 1966 , Page(s): 5a - 7a
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  • Calendar

    Publication Year: 1966 , Page(s): 8a
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  • An Analog Computer Study of a Parallel AC and DC Power System

    Publication Year: 1966 , Page(s): 191 - 209
    Cited by:  Papers (21)
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    Overall critical evaluation of the dynamics of EHV dc-power transmission requires that a variety of system conditions and effects of many parameters be studied. Problems can be strictly electrical or electromechanical. In general, those that fall in the former category are of short time duration, while those in the latter may be either of intermediate duration, on the order of 1 second, or of long duration, from 2 to 40 seconds. The approach used, whether it be 1) a physical model such as a transient network analyzer; 2) an analog computer, sometimes called an electronic differential analyzer, or 3) a digital computer, will depend upon the specific problem at hand. The capabilities and limitations of the analog computer in providing solutions to electromechanical problems are outlined in this paper, and the results reported give insight into the dynamic performance characteristics of a dc link under constant current or power control, with or without a parallel ac line. View full abstract»

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  • A Direct-and Quadrature-Axis Representation of a Parallel AC and DC Power System

    Publication Year: 1966 , Page(s): 210 - 225
    Cited by:  Papers (38)
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    Some typical results of an analog computer study of a parallel ac-dc power system are given in a companion paper. Commutations of both inverter and rectifier bridges are among the simulations detailed. Recognizing that individual commutations are of negligible importance for many phenomena, a simpler system simulation seemed feasible on the analog computer, and this was begun. Not only was the simulation improved but transient phenomena could be examined, which in real time may be of longer duration than simulated and accuracy will be retained. This is of special importance in studying electromechanical transients in parallel ac-dc power systems, especially during sudden load changes. The validity of the new simulation is established. View full abstract»

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  • Improving Transient Stability of AC System by Joint Usage of DC System

    Publication Year: 1966 , Page(s): 226 - 232
    Cited by:  Papers (13)
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    Studies of stability problems are expected to be developed in parallel ac-dc systems. Results obtained by the experiment on the artificial ac and dc transmission facilities were: the more the dc power of steady state compared with the ac power, the more the transient stability is improved. The transient stability is improved if the dc power is rapidly increased in case of faults in the ac system. The 3-phase short circuit at the sending ac system results in a serious decrease of the dc power. This decrease causes the generator to accelerate at the sending end. Two control methods for the countermeasure are presented. View full abstract»

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  • Unbalanced Converter Operation

    Publication Year: 1966 , Page(s): 233 - 239
    Cited by:  Papers (4)
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    The results of a digital computer investigation of the effects of unbalanced alternating voltages on converter operation is described. The problem is approached from the standpoint of symmetrical components and an exact analysis has been carried out for an arbitrary ratio of positive and negative sequence voltages. Variation of the grid control firing angle has been considered permitting a full range of rectifier and inverter performance. Effect of the magnitude of commutating reactance is also investigated. With the analysis of the data obtained from the exact representation indicated, it is possible to obtain the sequence impedances. It should be noted that these sequence impedances are a mathematical simplification and are not made of physically realizable R, L, or C, components. View full abstract»

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  • Ground Current in High-Voltage Transmission I - Preliminary Report on Columbia Basin Tests

    Publication Year: 1966 , Page(s): 240 - 247
    Cited by:  Papers (4)
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    High-voltage dc transmission has been proposed for linking the power networks of the Pacific Northwest and Southwest. An advantage of direct current, not possessed by alternating current, is that one-half the rated power of a line can be transmitted, with one conductor out of service, by allowing the current in the remaining conductor to return through the earth. To realize this advantage, however, it is necessary to insure against certain possible harmful effects from ground current flow. View full abstract»

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  • Direct Current Ground Electrode Behavior

    Publication Year: 1966 , Page(s): 248 - 253
    Cited by:  Papers (1)
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    The conducting of moderately high direct current through earth between variously sized electrodes installed in different types of soil has provided test data which, while in general agreement with expectations [1]-[3], places much more emphasis on the electrode-to-earth contact area than had been necessary in past designs, which were primarily used for conducting ground currents of short time duration. Analysis of the data indicates that the design of a grounding grid which is to carry current to earth continuously for several hours can be treated as two independent problems: The outer dimensions, or perimeter, should be based upon computed resistance to remote earth [4], with utilization of the low-resistivity valuesg usually measured at wide probe spacings. The contact area should be based upon the power dissipation value computed from the square of the proposed current density and from the measured soil-resistivity value at the electrode-to-soil interface. View full abstract»

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  • Investigations of Ground Current Phenomena Associated with HV DC Transmission

    Publication Year: 1966 , Page(s): 254 - 260
    Cited by:  Papers (1)
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    A brief outline is presented of major considerations when the earth is proposed for use as a return conductor on high-voltage direct-current transmission systems. Approximate values are given of earth potential gradients near an electrode, as determined in 1963 near Tracy switchyard by relatively low magnitude test currents and small spacings of test electrodes. Similar, more precise values are listed from large-scale tests conducted in March 1964 between Tracy switchyard and a point west of Red Bluff, Calif., with larger current flows and an electrode spacing of approximately 175 miles. Disturbances of a significant level are indicated as being confined to very small areas surrounding each electrode. Details of test equipment, transmission line facilities, permanent and temporary ground mats which were used as electrodes, and locations of various oil, gas, and water lines in close proximity to the electrodes are discussed. Design, installation, and general operation of a deep well electrode adjacent to the Tracy switchyard ground mat is described. The shielding effects of separation of ac and dc grounding points, as illustrated by specific test data and confirmed in laboratory experiments, is presented. Some possibilities for use of such shielding in limiting adverse flow of direct current in the neutral circuits of high-voltage ac systems are indicated. Additional tests to obtain further data for use in final designs are suggested. View full abstract»

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  • Electrodes for EHV DC Transmission in a Metropolitan Area

    Publication Year: 1966 , Page(s): 260 - 264
    Cited by:  Papers (4)
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    Increased reliability of EHV dc transmission systems is obtained through the use of the earth as a return circuit during emergency periods when one pole is out of service. Earth return operation requires electrodes which can conduct full line current into the earth without damage to surrounding underground structures and facilities. This paper describes theoretical and field investigations made to determine the most suitable type of electrode for use in a heavily industrialized metropolitan area. View full abstract»

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  • A Study of Alternators with Superconducting Field Windings: I - Analysis

    Publication Year: 1966 , Page(s): 264 - 274
    Cited by:  Papers (15)
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    This paper presents an analysis of the performance and specific power output of iron-free alternators utilizing superconducting field windings and room-temperature armatures. Two basic configurations are considered: a stationary superconducting field winding surrounded by a rotating room-temperature armature and a rotating room-temperature armature surrounded by a stationary superconducting winding. View full abstract»

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  • A Study of Alternators with Superconducting Field Windings: II - Experiment

    Publication Year: 1966 , Page(s): 274 - 280
    Cited by:  Papers (6)
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    This paper describes a program to determine the operating characteristics of an experimental alternator using super-conducting field coils. The alternator itself consisted of a stationary superconducting 4-pole field winding made of 6800 turns of copper-plated Formvar-insulated Nb-25-percent Zr wire which had a critical current of 28 amperes. The field winding was inserted into a finger at the bottom of a typical laboratory-type helium test dewar. View full abstract»

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  • Orthogonal Networks

    Publication Year: 1966 , Page(s): 281 - 294
    Cited by:  Papers (6)
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    This paper establishes the mathematical structure of orthogonal networks where both open-and closed-path currents flow simultaneously. A summary of the augmented all-mesh and inverse networks is presented. The structure of the network laws of all variables in the orthogonal networks is derived and simplifications of the conventional mesh and open-path networks are presented. View full abstract»

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  • Discount Rate for Present Wort Studies

    Publication Year: 1966 , Page(s): 295 - 303
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    The purpose of this paper is to present the principles governing the determination of the discount rate which should be used by engineers in making economic and feasibility studies, especially when using the present worth method. The discount rate should reflect current and expected interest costs and equity earnings rather than the imbedded costs as allowed by regulatory authorities in the rate of return. View full abstract»

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  • Late Discussion

    Publication Year: 1966 , Page(s): 303 - 307
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  • Contributors

    Publication Year: 1966 , Page(s): 307 - 311
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  • Blank Page

    Publication Year: 1966 , Page(s): 311a
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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