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IEEE Transactions on Power Apparatus and Systems

Issue 4 • Date April 1968

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Displaying Results 1 - 25 of 41
  • 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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    Freely Available from IEEE
  • News

    Publication Year: 1968, Page(s): 1a
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    Freely Available from IEEE
  • Calendar

    Publication Year: 1968, Page(s): 2a
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  • Tennessee Valley Authority's Radio Interference Experiences on 500-kY Transmission Lines

    Publication Year: 1968, Page(s):903 - 911
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2031 KB)

    This paper describes a two-year investigation of radio interference (RI) levels in the vicinity of 400 miles of operating 500- kV transmission lines. Discussions are given of instruments, antennas, and types of surveys; the design and development of RI monitoring stations; and comparisons of the relative merits of various supplementary items. Results from RI profiles, RIV measurements, and monitor... View full abstract»

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  • Corona and RI Caused by Particles on or Near EHV Conductors: II - Foul Weather

    Publication Year: 1968, Page(s):911 - 927
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (9825 KB)

    This study was made to identify and photograph the foul-weather coronas occurring on a high-voltage transmission-line conductor and to establish their radio-noise importance. On the most tested 230-kV line, snow impingement plumes caused radio interference (RI) to 90 times, and water drop spray plumes to 75 times, that of the base fair-weather noise level. Foul-weather RI caused by snow, rain, fog... View full abstract»

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  • Seasonal Variation of Fair-Weather Radio Noise

    Publication Year: 1968, Page(s):928 - 931
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (783 KB)

    One year of fair-weather radio noise (RI) data from an EHV line was analyzed. Two types of variation were found: long- term over several months and short-term over several days. Summer RI readings were higher than winter readings by 12 dB and lasted longer. Based on these results, a procedure for predicting average monthly RI levels is outlined. Short-term variations of fair-weather RI level were ... View full abstract»

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  • Radio Interference from the First 735-kV Line of Hydro-Québec

    Publication Year: 1968, Page(s):932 - 939
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1721 KB)

    Results of radio interference (RI) level measurements on the first 735-kV line of Hydro-Quebec are presented. The cumulative relative frequency of RI levels for the period from October 1, 1965, to July 17, 1966, is studied. An approximation of this curve by three uniformly distributed meteorological conditions and the dis- tribution curve of absolute humidity are presented. An ensuin equation for ... View full abstract»

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  • RI Problems in HV-Line Design

    Publication Year: 1968, Page(s):940 - 946
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1751 KB)

    Criteria for the selection of line conductors and insulators are presented which may be helpful to the HV line designer when choosing among different line solutions. Methods are given for the predeternination of RIfrom bothconductors and insulatorstrings, then criteria are exposed for the definition of "limit" values for RI levels; these criteria are for the designer's reference. View full abstract»

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  • Switching and Lightning Impulse Discharge Characteristics of Large Air Gaps and Long Insulator Strings

    Publication Year: 1968, Page(s):947 - 957
    Cited by:  Papers (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4604 KB)

    Analysis of the influence of electrode shapes on the behavior of air gaps, both with and without insulator strings between the electrodes, is completed through the use of switching impulse tests. Results of a similar analysis for lightning impulse tests are also described. An attempt is made to correlate the behavior of air gaps in switching and lightning impulse tests to a factor k which characte... View full abstract»

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  • Some Physical Properties of Electrical Discharges on Contaminated-Surfaces

    Publication Year: 1968, Page(s):957 - 963
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5177 KB)

    The various discharge phenomena caused by contamination of insulator surfaces were investigated by means of slow and fast oscillographic recordings of the discharge current. It was found that the surface discharges have distinct stages of development. The visual manifestations were recorded simultaneously with the current pulses, providing a good correlation and an exact physical interpretation. I... View full abstract»

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  • Influence of Preexisting DC Voltage on Switching Surge Flashover Characteristics

    Publication Year: 1968, Page(s):964 - 969
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3512 KB)

    Flashover characteristics are presented for air gaps and insulators when a switching surge and a dc voltage are simultaneously applied to test specimens. In the first case, both a switching surge and a dc voltage were applied to the same electrode. This test is equivalent to the stresses generated by the reclosing of a circuit breaker. It was found that positive switching surge flashover voltages ... View full abstract»

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  • A Fybrid Computer Study of a DC Power System: I

    Publication Year: 1968, Page(s):970 - 979
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1907 KB)

    A hybrid Computer, a direct combination of a digital and an computer, is used to simulate a dc power system. To achieve maximum computing proficiency the simulation is arranged so that the distributed parameter transmission system is represented on the digital computer while the analog computer is employed to represent the 6-phase converters. Results of a computer study are presented wherein syste... View full abstract»

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  • A Hybrid Computer Study of a DC Power System: II

    Publication Year: 1968, Page(s):980 - 988
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1585 KB)

    In this paper the hybrid computer-is-used-to-study dc power system consieing-of a 2-wire transmission system and two 12-phase converters with ground return. This work is an extension of the hybrid computer study of a 6-phase, 2-wire dc system which was reported in Part I of this paper.[2] Several features of a dc power system are presented including a comparison of results obtained from the hybrid... View full abstract»

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  • Dynamic Simulation of HVDC Power Transmission Systems on Digital Computers - Generalized Mesh Analysis Approach

    Publication Year: 1968, Page(s):989 - 996
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1533 KB)

    This paper introduces and develops a new generalized approach to the dynamic simulation of an HVDC power transmission system. The approach involved is a generalized method of mesh analysis applied to the HVDC network. The simulation of HVDC convertors is characterized by the fact that the network to be solved changes with each discontinuity, such as valve firing and end of commutation. To facilita... View full abstract»

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  • Computer Analysis of Electrostatically Induced Currents on Finite Objects by EHV Transmission Lines

    Publication Year: 1968, Page(s):997 - 1002
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1136 KB)

    A method is presented which allows the evaluation of electrostatically induced currents by EHV transmission lines in objects where fringing effects are not negligible and consequently the problem cannot be reduced to the two-dimensional case. A digital program is developed based mainly on experimental results obtained on an air model, the validity of which is shown by comparison with measurements ... View full abstract»

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  • Air Model for the Study of Electrostatic Induction by Transmission Lines

    Publication Year: 1968, Page(s):1002 - 1010
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1797 KB)

    A scale model of an extra-high-voltage transmission line (735 kV) has been developed for the study of electrostatic induction in objects such as trucks, trailers, and lighting towers which are in the vicinity of the line. The model is operated in air at high frequencies. The method, including the factors which affect accuracy, is described. Special attention is given to the electrostatically induc... View full abstract»

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  • Discharge Study of 735-kY Lines by Analog Computer and Field Tests on 230-and 315-kV Lines

    Publication Year: 1968, Page(s):1010 - 1017
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2439 KB)

    A study was done to analyze the discharge of a 735-kV line after its separation from the network. Two particular cases are treated: a short transmission line with saturable magnetic potential transformers at proper extremities, and a longer line with linear reactances also connected at both ends. A rapid discharge after the opening of the line allows an automatic reclosure some 25 Hz later without... View full abstract»

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  • Investigation of Lightning Damages on Distribution Lines

    Publication Year: 1968, Page(s):1018 - 1025
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1521 KB)

    Lightning damage on 3.3-and 6.6-kV overhead distribution lines is investigated. The damaged apparatus and its components are distributed on the line in the vicinity of lightning stroke point. Induced lightning surges are very dangerous at the line ends and they attack the poles branching the line harder than the neighboring poles. It is considered that blowing of primary fuses for distribution tra... View full abstract»

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  • Determining Maximum Overvoltages Produced by EHV Circuit Breaker Closure

    Publication Year: 1968, Page(s):1026 - 1032
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1563 KB)

    A method of determining voltage levels due to energizing or reclosing EHV transmission lines by using traveling phasor concepts is described. The major advantage over previously described methods is economy in computation since the energizing phase need not be varied. Comparisons with field tests and analog results show good agreement. View full abstract»

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  • Verification Tests of the VEPCO 500-kY System

    Publication Year: 1968, Page(s):1032 - 1044
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5554 KB)

    The results of the first field tests performed to verify the design of the Virginia Electric Power Company 500-kV system are presented. Initial radio influence measurements made on each line section are compared with levels calculated during the design studies. Switching-surge voltages recorded during various normal and abnormal switching conditions are given, and are shown to be well within predi... View full abstract»

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  • Developing Safe Working Procedures for EHV DC Hotline Maintenance

    Publication Year: 1968, Page(s):1044 - 1050
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2758 KB)

    An important phase of the investigative work preparatory to the operation and maintenance of the Pacific Northwest- Southwest dc intertie is the development of safe working procedures.[1] This paper describes the laboratory and field tests performed to determine the dc characteristics of hotline tools, and to gain more knowledge of certain phenomena peculiar to dc systems which may influence maint... View full abstract»

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  • Statistical Study of Electric Fields from Earth-Return Tests in the Western States Compared with Natural Electric Fields

    Publication Year: 1968, Page(s):1050 - 1057
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1781 KB)

    Preliminary grounding tests have been carried out by the Bonneville Power Administration and by the Bureau of Reclamation in three regions of the western states, in preparation for the installation of a HVDC transmission system linking the Pacific Northwest and Southwest regions. Electric fields observed about ground mat locations in the Washington-Oregon area, the southern Nevada area, and the ce... View full abstract»

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  • Development of Experimental 20-kY, 36-MW Solid-State Converters for HVDC Systems

    Publication Year: 1968, Page(s):1058 - 1066
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8722 KB)

    Two 20-kV, 36-MW converters, one used as a rectifier and the other as an inverter in a pump-back configuration, have been operated successfully demonstrating the feasibility of SCRs for high-voltage high-current applications. Effects of commutation transients within the converters and on other apparatus have been thoroughly explored and analyzed. View full abstract»

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  • Interpretation of Field Vibration Data

    Publication Year: 1968, Page(s):1066 - 1073
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2982 KB)

    Field and laboratory experiments concerning overhead transmission-line vibration show correlation between conductor strain and differential displacement. A method for converting f- differential displacement to strain is described. This conversion is necessary so that data from wide-spread geographical locations may be directly comptred. It is pointed out that, while the dynamic strain is important... 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