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Power Apparatus and Systems, IEEE Transactions on

Issue 4 • Date July 1974

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Displaying Results 1 - 25 of 31
  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Page(s): c1
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    Freely Available from IEEE
  • IEEE Power Engineering Society

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    Freely Available from IEEE
  • Membership Application IEEE Power Engineering Society

    Page(s): 1009
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    Freely Available from IEEE
  • Order Form for IEEE Publications

    Page(s): 1010
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    Freely Available from IEEE
  • Abstracts 1974 Underground Transmission And Distribution Conference

    Page(s): 1011 - 1024
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  • Power System Disturbances During A K-8 Geomagnetic Storm: August 4, 1972

    Page(s): 1025 - 1030
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    Solar flares can trigger severe fluctuations in the earth's magnetic field, termed geomagnetic storms. Geomagnetic storms produce quasi-dc currents in 60 Hz electric power systems. These spurious dc currents caused tundesirable equipment and system operating effects. A moderately severe geomagnetic storm occurred on August 4, 1972. The effects of that storm on electric power systems in the continental United States and parts of Canada are documented and related to latitude, geological factors, and intensity of the recorded geomagnetic field variations. View full abstract»

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  • The Effects of Geomagnetic Storms on Electrical Power Systems

    Page(s): 1031 - 1044
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    Geomagnetic field fluctuations produce spurious, quasi-dc currents in power systems. The currents enter through system grounding points, and are of sufficient magnitude to cause half-cycle saturation in power transformers. These currents have been recorded and are summarized, and recommendations made in the significant problem areas of system disturbances and equipment effects due to geomagnetic storms. The major problem areas include increased VAR requirements and shifts in VAR flow, system-voltage fluctuations, generation of harmonics, protective relayiing misoperations, and possible localized internal heating in transformers. Recommendations relating to these effects have Pot been published previously. View full abstract»

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  • Dynamic Measurements During Short-Circuit Testing of Transformers Part I: Instrumentation and Testing

    Page(s): 1045 - 1053
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    The instrumentation methods and testing procedures utilized to obtain dynamic forces, displacements, pressures, and mechanical strains on a full-size 19.5 MVA three-phase, three-winding oil-filled power transformer is presented in this paper. Each phase of this transformer was constructed with different insulating materials and different clamping methods; one of these included an externally adjustable hydraulic clamping system. The data obtained on this transformer will add new and fundamental knowledge of the effects of winding prestress, clamping methods, insulating materials, and tap arrangements on the dynamic characteristics of large power transformers during short circuit. This first paper will form the foundation for the data presentation and analysis to be presented in later papers. View full abstract»

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  • Technique, Applicable to Circuit Breakers, for the Measurement of the Spatial Distribution of the Current in an Arc

    Page(s): 1054 - 1062
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    A new technique has been developed for the measurement of the spatial distribution, at the electrode surface, of the current in a moving arc. In the case studied, the arc is driven by a. transverse magnetic field between two parallel electrodes. The technique is however also applicable to a gas blast arc. The technique is based on the measurement of the variation of the magnetic flux inside a cavity located below the electrode surface. This variation of the magnetic flux is shown here to be related to the spatial distribution of the current in the arc. The frequency response of the measuring system has been determined experimentally and is taken into account. Applications to circuit breakers are considered and discussed. View full abstract»

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  • Motor Operated Disconnecting Swith Ice Tests at a Climatic Laboratory

    Page(s): 1063 - 1068
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    As a result of full scale indoor operational ice tests performed in the Spring of 1973, it became apparent that high voltage air disconnecting switches built and tested under current ANSI standards will not perform satisfactorily when coated with 3/4 (1.9 cm) inch of ice and operated with a motor mechanism. It was also demonstrated that one motor operation both opening and closing under iced conditions is a piactical requirement and is within the design capabilities of most switch manufacturers. View full abstract»

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  • Heat Pipe Cooled Induction Motor

    Page(s): 1069 - 1075
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    The feasibility of employing heat pipe cooling in an A-C Induction Motor has been demonstrated with the successful analysis, design and construction of an experimental motor. The heat pipes were integrally designed into both the rotor and stator of the motor allowing the heat absorbing section (evaporator) of the heat pipes to be placed as close as possible to the points of heat generation. The experimental portion of this effort demonstrated the thermal effectiveness of this configuration as well as supplying verification of a prior thermal analysis of this type of motor. The overall performance indicated the motor is applicable for adjustable speed operation at constant torque through an seven-to-one speed range as well as producing information on the operating characteristics under varying load and frequency conditions. View full abstract»

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  • Inductances of Printed Circuit Windings

    Page(s): 1076 - 1082
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    A substantial number of situations exist in modern technology where windings are an etched copper laminate. These windings are characterized by a rectangular cross section and are in a smooth air gap bounded by materials which may have widely different relative permeabilities. In this analysis Rogowski's method of air gap analysis has been combined with the winding function concept proposed by Robinson and utilized extensively by Schmitz and Novotny. General formulae for air gap fields and winding inductances are presented. View full abstract»

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  • Watthour Meter Accuracy on SCR Controlled Resistance Loads

    Page(s): 1083 - 1089
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    The accuracy of watthour meters on resistance loads controlled by silicon controlled rectifiers is discussed with particular reference to operation in the overload range of the meter. Test results for representative meters are shown and an explanation offered for observed characteristics. View full abstract»

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  • Media Telemetry Systems for Data Acquisition and Transfer

    Page(s): 1090 - 1095
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    The problem of unreasonably complex process wiring in large power generating stations and in continuous process plant can be overcome in two ways by using telemetry systems, firstly for Data Acquisition from each section of the plant to the corresponding control room, and secondly for Data Transfer between interlinked control rooms. View full abstract»

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  • The Cabora Bassa D.C. Transmission System: Overvoltage Protection and Insulation Coordination

    Page(s): 1096 - 1104
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    The Cabora Bassa-Apollo HVDC Transmission is the first UHV dc long distance transmission system using thyristor valves. The overvoltage protection and insulation co-ordination for the terminal stations of this systemaredescribed. It is shown, how the specific requirements of the thyristor valves for strict and reliable overvoltage protection have been solved by direct surge arrester protection with reasonable insulation levels of the valves and the other HVDC station equipment. The selection of post and suspension insulators used in the d.c. section of the HVDC station, which is fully outdoor, is described as well. View full abstract»

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  • Recommended Practice for Installation Design and Installation of Large Stationary Generating Station and Substation Lead Storage Batteries

    Page(s): 1105 - 1109
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    Published as work in progress, this document presents pertinent information regarding recommended design for and practices concerning the location, mounting, preparation and installation of large stationary lead storage batteries, including special requirements for nuclear power generating stations. This document was affirmatively balloted by Station Design Subcommittee of Power Genetation Committee, SC-4 working group of NPEC and other representatives of the industry for presentation as "work in progress". As a result of this ballot, several concerns in the area of qualification became evident. After consideration of these concerns and additionat comments from the industry, this document was revised and will be submitted to IEEE Standards as a recommended practice. A separate document will be initiated to cover qualification. View full abstract»

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  • A Half Cycle Bus Differential Relay and its Application

    Page(s): 1110 - 1120
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    The principles of a new high speed bus differential relay which operates for an internal fault condition within 1 to 2 ms and initiates tripping of circuit breakers in about 7 ms is described. The relay is self-powered and requires no auxiliary voltage other than that needed for the output tripping and alarm functions. It is shown to be insensitive to remanence and saturation of current transformers and to systems fault levels and X/R ratios. View full abstract»

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  • Class IE Cables for Nuclear Power Generating Stations

    Page(s): 1121 - 1132
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    With the publication of IEEE Guide P 383 For Qualification Testing, it is appropriate to present typical data relating-to this document, and to briefly discuss its significance. Designed life performance for nuclear stations must be predicated for the most part on test data obtained from cable systems under simulated environmental conditions which are peculiar to this application. This paper presents data in the areas of (1) long time exposure to moisture at elevated temperature, (2) air oven heat aging, (3) simulated reactor radiation during normal operation as well as during and after a design basis event, and (4) flame testing of cables. View full abstract»

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  • A Fast Approximate Technique for Outage Studies in Power System Planning and Operation

    Page(s): 1133 - 1142
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    This paper presents a technique that simulates load and generation changes and outages of transmission lines and transformers. The modification of power injected into the system buses, which would simulate the outage of a transmission element, is calculated using the sensitivity matrix of the basic system state. The real and reactive power flowing in the system elements and voltages at all the system buses are then computed. The proposed technique has been applied to the Saskatchewan Power Corporation system andto the combined SPC and Manitoba Hydro systems. The power flows and bus voltages calculatedby the proposed technique are compared with those obtained from the Newton Raphson load flows. View full abstract»

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  • A Numerical Model for Current-Zero Arc Interruption Processes

    Page(s): 1143 - 1149
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    Consideration is given to the various energy transfer processes that dominate the interruption at current-zero of an arc in a gas blast breaker. Processes considered in some detail are Ohmic heating, radial thermal conduction, radial thermal convection, radiation transport, and viscous heating. A numerical model is developed based on the time-dependent energy equation describing these processes. A discussion of initial conditions for such a model is given ancj preliminary results are presented. View full abstract»

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  • Dynamic Interaction of Multi-Machine Power System and Excitation Control

    Page(s): 1150 - 1158
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    In this paper the dynamic interactions between mechanical and reactive modes of machines in a multi-machine power system are investigated. The dynamic interactions are expressed in terms of machine angles, transient voltages, and coefficients which are functions of system parameters and operation conditions. The effect of the dynamic interaction can be examined by the electric torque loci on the A6-Aw phase plane. It is found that the interaction between the mechanical modes of machines has significant effect on stability characterized by the natural mechanical oscillation frequency and damping of individual machines. View full abstract»

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  • Synthetic Test Installation for Converter Valves for HVDC Transmission

    Page(s): 1159 - 1164
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    A synthetic valve test facility employing a unique low voltage off-commutation scheme has been constructed for the development and testing of Liquid Metal Plasma Valves for HVDC transmission. The installation is capable of testing valves up to a voltage and current of 200 kV and 1800 A, respectively. It possesses a high degree of operational flexibility and is able to closely simulate the working duty of converter valves used in HVDC terminals. The operating characteristics of the test installation have been illustrated. View full abstract»

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  • Steady State Analysis of Thyristor Controlled Three Phase Induction Motors Using State Space Techniques

    Page(s): 1165 - 1172
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    The steady-state analysis of a three phase induction motor with a pair of back to back connected thyristors in each line is presented. A mathematical model suitable for the analysis is developed. The model retains the stator currents unaltered, whether the neutral is connected or not. This facilitates the application of current constraints introduced by thyristors and of boundary matching conditions needed for the steady-state analysis. State space modelling is employed and the initial condition vector pertaining to steady-state is obtained directly. The need for digital simulation of the characteristics of thyristors and integration from arbitrary initial conditions are avoided. The method is well suited for digital solution, easy to programme and fast in execution. View full abstract»

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  • Harmonic Effects in Rotating Electric Machines

    Page(s): 1173 - 1176
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    When harmonic effects are of significance, direct algebraic analysis permits the determination of machine current, voltage and torque waveforms with extremely hiclh efficiency. Unfortunately, this efficiency, which permits large savings in computational time over alternative methods, has only been employed in simple situations because of the enormous labour involved in deriving the initial algebraic equations. The availability of an algebraic compiler, FORMAC, has permitted mechanization of this initial phase of the analysis so that general analvtic results are now available. The validity of these equations has been experimentally verified by considering two typical cases, the wound rotor induction motor and the three-phase synchronous machine, and two particularly demanding situations, the single-phase synchronous machine and an induction type machine with single-phase primary and secondary windings. View full abstract»

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  • Auxiliary and Offsite Power Systems for an Offshore Generating Station

    Page(s): 1177 - 1182
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    This paper describes the requirements and the design basis considerations used for supplying offsite power to offshore floating nuclear plants, Atlantic No. 1 and 2. Considerations for the on-board electrical system are discussed. Different types of bulk power transmission systems are under consideration in order to fulfill both the transmission and offsite power requirements. 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