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IEEE Transactions on Power Apparatus and Systems

Issue 6 • Date June 1968

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Displaying Results 1 - 24 of 24
  • 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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  • Determination of Transient Recovery Voltages by Means of Transient Network Analyzers

    Publication Year: 1968, Page(s):1371 - 1380
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2305 KB)

    In surveying recovery voltage transients on several large HV networks, it was found that different transient network analyzers did not always yield consistent results. The discrepancies were found to arise from differences in representation of overhead lines by lumped components and from inaccuracy in representing the frequency-dependent resistance of the system components, especially lines and tr... View full abstract»

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  • Importance of Fretting in Vibration Failures of Stranded Conductors

    Publication Year: 1968, Page(s):1381 - 1384
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3459 KB)

    Surface fretting between conductor strands and support hardware plays an important part in the occurrence of conductor fatigue failures resulting from aeloian vibration. Examination of conductor strand failures from lines in service and from laboratory spans showed that fatigue cracks originated at fret marks in all cases. Laboratory fatigue tests indicate that fretting causes a reduction in the f... View full abstract»

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  • Factors Relative to High-Amplitude Galloping

    Publication Year: 1968, Page(s):1385 - 1396
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2352 KB)

    Galloping is a type of vibration that can occur when wind acts on an ice-coated conductor. Aerodynamic data from static models in wind tunnels are used in a digital computer program that calculates the wind energy input for dynamic models at their most unstable static angle of attack. Experiments at large dynamic angles of attack with models of low structural damping are suggested. The design of a... View full abstract»

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  • Time-to-Flashover Characteristics of Polluted Insulation

    Publication Year: 1968, Page(s):1397 - 1404
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1650 KB)

    It is shown that times to flashover obtained by von Cron and Dorsh with alternating voltage on an artificially polluted insulator can be fitted into a relation ( V2-V02) t = KR2 where V is the applied voltage, t is the time to flashover, R is the resistance of pollution, and Vo and K are experimental constants. Experiments were carried out using pulse unidirectional voltage applied to a narrow con... View full abstract»

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  • Forecasting with an Input-Output Model

    Publication Year: 1968, Page(s):1404 - 1411
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1637 KB)

    One of the more difficult problems of the modeling of corporate activities is in the area of forecasting equipment retirement. This paper develops a statistical forecasting method based on an input-output model suitable for use in this particular problem as well as in similar areas. The model assumes that present output is a linear, time invariant function of current and past input values. The mod... View full abstract»

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  • Determination of the Dynamic Response of Electrical Systems by Means of a Digital Program

    Publication Year: 1968, Page(s):1411 - 1418
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1493 KB)

    All the solutions for the determination of the stability of an electrical network by means of digital computers contain some approximation, because of the complexity of the system simulation. The simplifications adopted in the majority of these programs are not always justified and, therefore, the confidence in the results is not always well established. The choices made in making a new program ar... View full abstract»

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  • An Improved Method of Determining Incremental Loss Factors from Power System Admittances and Voltages

    Publication Year: 1968, Page(s):1419 - 1425
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1214 KB)

    A method is presented for reducing the many complicated calculations of partial derivatives involved in the exact expression for incremental loss factors (that is,) needed for economic load dispatching. Calculations of the partial derivatives of voltage phase angles with respect to plant power output, which comprise the major obstacle to use of the exact expression, are avoided by digital-computer... View full abstract»

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  • Excitation Control to Improve Powerline Stability

    Publication Year: 1968, Page(s):1426 - 1434
    Cited by:  Papers (55)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3340 KB)

    The influence of generator voltage regulators upon powerline stability is closely scrutinized by analog techniques. Contrary to common concepts, it is shown that high-speed control of excitation to maintain constant terminal voltage actually hampers rather than aids damping and powerline stability. It is further shown that damping and stability are greatly improved by supplementing excitation cont... View full abstract»

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  • Relaying the Keystone 500-kY System

    Publication Year: 1968, Page(s):1434 - 1439
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2656 KB)

    The brief description and diagrams of system arrangement will familiarize the reader with the Keystone System, an entirely new 600-mile 500-kV transmission system without series capacitors or shunt reactors. Background infornation on the relay requirements and the features of the "local-backup" scheme provide a basis for understanding the protection applied to the individual equipments. Of signifi... View full abstract»

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  • Load Rejection Testing of Large Thermal-Electric Generating Units

    Publication Year: 1968, Page(s):1440 - 1453
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3019 KB)

    An analysis of the major disturbances that have occurred over the past few years has demonstrated the importance of maintaining, if at all possible, continuous operation of system generating units. View full abstract»

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  • Electrical Features of Boundary Hydroelectric Project

    Publication Year: 1968, Page(s):1454 - 1460
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3775 KB)

    The Boundary Hydroelectric Project is described and the essential features of the electrical installation are discussed, with emphasis on generator characteristics, plant control system, and coordinated operation within the Northwest Power System. View full abstract»

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  • Computer representation of excitation systems

    Publication Year: 1968, Page(s):1460 - 1464
    Cited by:  Papers (133)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (993 KB)

    The availability of large digital computers has permitted more extensive computation of power system stability, a subject of increasingly greater importance. This paper suggests a common nomenclature and control system representation of the various excitation systems now available. It can be used to define input data requirements for computer programs, and can provide a consistent format in which ... View full abstract»

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  • Experience with high-speed rectifier excitation systems

    Publication Year: 1968, Page(s):1464 - 1470
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1511 KB)

    Excitation systems which utilize controlled rectifiers supplied directly from the generator terminals for the main exciter are in service at four remote generating stations. Due to the nature of the power system, these excitation systems were designed to withstand high ac overvoltages and to provide simultaneous control of a number of parallel generators. Experience in testing and operating these ... View full abstract»

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  • Switching Surge Study of EHV Station Posts: I

    Publication Year: 1968, Page(s):1471 - 1480
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6736 KB)

    Results of tests and research are given for EHV station post insulators from 900 to 2050 BIL (basic imnpulse insulation level), including flashover and withstand on switching surge, wet and dry. Also studied are variations in withstand and flashover as the insulator height above ground is varied, as the mounting structure is changed, and as the number of insulators in parallel in the test is varie... View full abstract»

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  • Resistively bridged harmonic filter for power converters [with disscusion and author reply]

    Publication Year: 1968, Page(s):1481 - 1485
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1007 KB)

    A commonly used form of harmonic filter for the ac side of mercury-arc power converters (rectifiers or inverters) consists of several series-resonant branches connected in parallel. Each branch is tuned to one of the principal harmonic frequencies generated by the converter. View full abstract»

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  • Liapunov Stability Analysis of Reluctance Motors

    Publication Year: 1968, Page(s):1485 - 1491
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1239 KB)

    The application of a relatively simple Liapunov theorem to the stability analysis of a reluctance synchronous motor is described. The analysis proceeds as follows: 1) The differential equations representing the reluctance motor are written with the machine regarded as a group of coupled windings including time-varying self and mutual inductances. In developing these equations, it is assumed that b... View full abstract»

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  • Cable Corona Signals - Their Origin and Detection

    Publication Year: 1968, Page(s):1492 - 1507
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7731 KB)

    To clarify some of the variables associated with the origin and detection of cable corona, two solid dielectric cables were constructed and tested. One, with various types of corona-producing elements introduced into it, was scanned at progressively increasing voltage. Some corona elements gave signals whose intensity increased with voltage. The intensity of others changed very little, presumably ... View full abstract»

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  • Calculation of Traveling Waves on Single-Conductor Cable Circuit with Cross-Bonding

    Publication Year: 1968, Page(s):1507 - 1514
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3436 KB)

    It is well known that when traveling waves invade a single-conductor cable whose sheath is cross-bonded, a rather high voltage is induced on the sheath circuit. Of the several experimental and theoretical examinations of this subject, most theories to date are constructed upon an idea of surge impedance. In the case of a cable circuit consisting of a conductor and sheath, this approach is imperfec... View full abstract»

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  • Lightning Protection in Multi-Line Stations

    Publication Year: 1968, Page(s):1514 - 1521
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2002 KB)

    Improved characteristics of modern arresters have substantially increased permissible separation distances and flexibility of arrester location in the protection of station and equipment against lightning overvoltages. This was demonstrated by investigations on representative station arrangements for 138-, 230-, and 345-kV system voltages using methods developed for evaluating the effective severi... View full abstract»

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  • Switching Surge Operating Duty of Lightning Arresters

    Publication Year: 1968, Page(s):1521 - 1531
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2307 KB)

    After mentioning different methods of testing the ability of an arrester to discharge long-duration switching surges, the artificial line discharge test with applied power frequency voltage is discussed. Oscillograms show that voltage transients during such tests may be influenced by the series gap of the test circuit. Test results agree fairly well with curves obtained from digital computations. ... View full abstract»

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  • Contributors

    Publication Year: 1968, Page(s):1532 - 1535
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    Freely Available from IEEE
  • Blank Page

    Publication Year: 1968, Page(s): 1535a
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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