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Power Apparatus and Systems, IEEE Transactions on

Issue 3 • Date March 1967

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

    Publication Year: 1967 , Page(s): c1
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  • IEEE Power Group

    Publication Year: 1967 , Page(s): c2
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  • A Method to Detect the Deionization Margin Angle and to Prevent the Commutation Failure of an Inverter for DC Transmission

    Publication Year: 1967 , Page(s): 259 - 262
    Cited by:  Papers (6)
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    A method is suggested to detect directly the deionization margin angle and to prevent the commutation failure of an inverter. The deionization margin angle is detected by anode- cathode voltage of a valve and ac phase voltage. The method to prevent the commutation failure, namely the one to hold the critical deionization angle keeps a necessary deionization angle for the alternating voltage drop, thus enabling safer valve operation. View full abstract»

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  • A Method of Automatic Frequency Ratio Control by a DC System

    Publication Year: 1967 , Page(s): 263 - 267
    Cited by:  Papers (5)
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    A method of automatic frequency ratio control (AFC) by a dc system is suggested. This control also provides a tie line bias control action (TBC) in ac¿dc systems, and can cooperate with the AFC and TBC in ac systems. The operating principle is that the frequency deviations of two ac systems are detected and its controller adjusts the dc power for constant frequency control. A logic circuit is provided in the controller to give the signals to regulate the governors of the generators. By the proper adjustment of the sensitivity of dc power, the dead band of frequency deviations, and the regulation sensitivity of the governors, the frequency control in the ac¿dc system can be acheived quite satisfactorily. View full abstract»

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  • Bonneville Power Administration's 1100-kV Direct Current Test Project: I - Measurements and Instrumentation

    Publication Year: 1967 , Page(s): 268 - 277
    Cited by:  Papers (3)
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    Methods of measurement and analysis of components of a five-mile extra-high-voltage direct-current test line and associated facilities are described. This paper presents new methods of recording and analyzing data secured over a long period of time concerning radio influence, corona loss, insulator leakage, and surge currents. Information secured from these recordings and analysis will be important to the transmission engineer in designing the most economical high-quality EHV dc transmission line. View full abstract»

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  • Bonneville Power Administration's 1100-kV Direct Current Test Project: II - Radio Interference and Corona Loss

    Publication Year: 1967 , Page(s): 278 - 290
    Cited by:  Papers (11)
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    This is the first report to the industry on radio influence (RI) and corona loss performance of the BPA 1100-kV (±550-kV bipolar) HV dc test line. The report covers bipolar and monopolar tests between December 1963 and December 1964 on three different line configurations. Large diameter single and twin conductor configurations designed for ±375¿500-kV operation comprised the line sections. Line lengths from 1.3 to 4.2 miles were investigated. Influence of voltage, pole spacing, measuring frequency, and weather were studied. View full abstract»

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  • A Laboratory Study of the Effects of Wind on DC Corona

    Publication Year: 1967 , Page(s): 290 - 298
    Cited by:  Papers (13)
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    The effects of wind on corona discharges from HV dc transmission lines were studied using two laboratory models. One model was used for studying the corona vs. wind characteristics of discrete metal projections from smooth conductors, while the other dealt with corona on stranded conductors. The investigation encompassed both 2-conductor and conductor-to-plane configurations at wind speeds up to 50 miles per hour. It was found that both corona loss and radio-influence voltages (RIV) were sensitive to wind in the 2-conductor configuration but not in the conductor-to- plane configuration. The results are correlated with previous findings and with the theories of corona discharges. View full abstract»

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  • Earth Fault Clearing on an HV DC Transmission Line, with Special Consideration of the Properties of the DC Arc in Free Air

    Publication Year: 1967 , Page(s): 298 - 304
    Cited by:  Papers (4)
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    For the design and sensitivity setting of dc line earth fault protection of HV dc transmission lines it is necessary to know the properties of a free burning dc arc. On a dc line such an arc is most probably initiated by an atmospheric over-voltage. The most important properties of the arc are the arc voltage and the deionization time. View full abstract»

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  • Design and Development of DC Cables

    Publication Year: 1967 , Page(s): 304 - 311
    Cited by:  Papers (10)
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    The first problem which arises concerning dc cables is determination of the gradient distribution within the insulation. It is shown that the dielectric absorption phenomena may be neglected, for they give only a space gradient distortion at the scale of a paper fiber, which does not seem to have an effect upon the practical dielectric strength of an insulation. Then, the gradient distribution is investigated as a function of the conductivity of the insulator, which varies with temperature and gradient. Consequently, the heating of the conductor tends to shift the maximum stress from the inner to the outer layers of the insulation, while the voltage increase tends to make the stress uniform. The dc breakdown gradients calculated according to the stated laws lead to a value of dielectric strength practically equal to that obtained during impulse tests, except for high temperatures. A sudden decrease of the dc dielectric strength is then observed, which is attributed to the thermal instability caused by the increase of the losses in the insulator. View full abstract»

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  • Correction [to "Variable soil thermal resistivity - Steady-state analysis"]

    Publication Year: 1967 , Page(s): 311
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    In the paper entitled "Variable Soil Thermal Resistivity - Steady-State Analysis," by J.V. Schmill, which appeared on pp. 215-223 of the February 1967 issue of this TRANSACTIONS, Fig. 6 of the discussion by A.F. Baljet appeared reversed in a number of copies of the issue. View full abstract»

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  • Electrical Characteristics of Oil-Impregnated Paper as Insulation for HV DC Cables

    Publication Year: 1967 , Page(s): 312 - 326
    Cited by:  Papers (19)
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    In dc cables the resistivity of the insulation is a very important parameter, as it determines the stress distribution and the power losses in the insulation. This paper gives the results of several tests on plane capacitors, from which the steady-state resistivity of four different kinds of paper and impregnants appear to be almost identical from this point of view. The transient behavior of one of the dielectrics is also shown, giving the current density as a function of time after the application of a direct voltage, for different temperatures and stresses. View full abstract»

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  • Metal-Clad Switchgear for 23 and 34.5 kV

    Publication Year: 1967 , Page(s): 327 - 337
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    The extension of metal-clad switchgear with oilless power circuit breakers to the higher voltages of 23 kV and 34.5 kV has awaited the development of a suitable circuit breaker unit. Prompted by the need of Duquesne Light Company for such 23-kV equipment for their new Oakland substation, the breakers described in this article were designed and developed. As a result, indoor and outdoor metal-clad switchgear, with all of their well- known advantages, are now available for both voltage ratings up to a 1500-MVA interrupting rating and for continuous current ratings of 1200 and 3000 amperes. View full abstract»

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  • A New HV and EHV Air Blast Circuit Breaker Design: I - Ratings, Construction, and Testing

    Publication Year: 1967 , Page(s): 338 - 349
    Cited by:  Papers (1)
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    In the electric power industry, much effort has been expended in the development of oilless circuit breakers, particularly for use in extra high voltage (EHV) systems. This paper describes a new line of HV and EHV air blast circuit breakers having a 2-cycle interrupting time rating, and an operating pressure of 370 psi. The breakers utilize separate power interrupting and circuit isolation modules to permit maximum flexibility in building breakers with a variety of interrupting ratings at various voltage levels, from the HV classes up to 550 and 765 kV and above. View full abstract»

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  • A New HV and EHV Air Blast Circuit Breaker Design: II - Fundamental Air System Considerations

    Publication Year: 1967 , Page(s): 349 - 360
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    Successful operating experience with air blast circuit breakers has led to the extension of these designs to meet the requirements of extra high voltage (EHV) systems 345 kV and above, with increased interest in the quality of air being supplied for pneumatic operation, air blast interruption, and as a dielectric medium. View full abstract»

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  • Sparkover in Mixtures of Air and Water Vapor

    Publication Year: 1967 , Page(s): 360 - 364
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    Tests at 100°C, where large amounts of water vapor can be present in air, indicate that the effect of water vapor on sparking voltage depends on the type of sparking. In the relatively uniform field between sphere gaps the sparking voltage is found to increase by about 6 percent when the water vapor content of air is increased from 0 to 5 percent by volume. However this sparking voltage increases by only an additional 5 percent (to 11 percent) when the water vapor content is increased from 5 to 25 percent. However sparkover voltage of a one-inch gap in a non-uniform field and resulting from successive pulsed discharges shows a slighty smaller increase (5 percent) when the water vapor content is increased from 0 to 5 percent but doubles when the water vapor content is increased from 5 to 25 percent. View full abstract»

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  • Photographic Studies of Particle Behavior under Varying Precipitating Conditions

    Publication Year: 1967 , Page(s): 365 - 368
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    The paths of particles during electrostatic precipitation were photographed using a low-power, long focal length microscope. The illumination was periodically interrupted so that the path of a particle appears as a series of dashes. The velocity of the particle at any portion of its path can be computed from the length of the corresponding dash. The particles, studies ranged from 40 to 200 ¿m diameter. Contrary to the assumptions that have usually been made in theoretical treatments of precipitation, impact phenomena at the surface appear to be very important, particularly for particles over 100 ¿m. Large particles may rebound without losing their negative charge or they may knock off agglomerations of previously deposited dust which have a positive charge and so are accelerated away from the collecting electrode. When back ionization occurs the paths of particles become quite irregular. Occasionally particles are observed to reverse their charge in a few milliseconds indicating that there are small regions of quite high density of positive ions. View full abstract»

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  • Impulse Characteristics of Aerial Spacer Cable

    Publication Year: 1967 , Page(s): 369 - 373
    Cited by:  Papers (2)
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    Although the overall performance record of aerial spacer cable on the Public Service Electric and Gas Company system has been excellent, the number of failures caused by lightning appears to be disproportionately high. To determine the optimum design criteria of this type of distribution system, a program of laboratory impulse tests was established. This paper presents the results of the laboratory tests, with volt-time curves for various components of the spacer cable system. This study is one of several performed by the Public Service Electric and Gas Company. View full abstract»

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  • Gas Evolution From Transformer Oils Under High-Voltage Stress

    Publication Year: 1967 , Page(s): 374 - 384
    Cited by:  Papers (3)
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    Some insulating oils when subjected to high-voltage stress undergo chemical changes that result in the formation of various gases. Since there are different insulating oils available to users that are made by various finishing techniques resulting in oils of significantly varied composition, a study of a range of these materials was made to show if they produced different amounts or types of gases. The evolution of gases from oils in atmospheres of hydrogen and nitrogen were studied when the stressing voltage and temperature were varied over reasonable ranges. View full abstract»

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  • Power Plant Response

    Publication Year: 1967 , Page(s): 384 - 395
    Cited by:  Papers (3)
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    Power plant response to load changes is a continuing subject of interest to operating management in power systems. This paper is a two-part report of a survey on power plant response made by an IEEE Working Group. Part I covers results and analyses of answers to questions on system load characteristics and operating practices. Part II covers results and analyses to answers on prime mover characteristics. A number of curves, scatter plots, and bar charts are presented showing the results of the survey by various size and type groupings. Appendixes I and II, giving the questionnaire and the tabulated summary of questionnaire replies from the completed replies of 128 systems, are not included.1 View full abstract»

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  • Contributors

    Publication Year: 1967 , Page(s): 396 - 400
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    Freely Available from IEEE

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