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Power Apparatus and Systems, IEEE Transactions on

Issue 3 • Date May 1974

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

    Publication Year: 1974 , Page(s): c1 - 1008-b
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    Freely Available from IEEE
  • IEEE Power Engineering Society

    Publication Year: 1974 , Page(s): c2
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    Freely Available from IEEE
  • Optimal Load Flow with Steady-State Security

    Publication Year: 1974 , Page(s): 745 - 751
    Cited by:  Papers (249)
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    The Dommel-Tinney approach to the calculation of optimal power-system load flows has proved to be very powerful and general. This paper extends the problem formulation and solution scheme by incorporating exact outage-contingency constraints into the method, to give an optimal steady-state-secure system operating point. The controllable system quantities in the base-case problem (e.g. generated MW, controlled voltage magnitudes, transformer taps) are optimised within their limits according to some defined objective, so that no limit-violations on other quantities (e. g. generator MVAR and current loadings, transmission-circuit loadings, load-bus voltage magnitudes, angular displacements) occur in either the base-case or contingency-case system operating conditions. View full abstract»

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  • Probabilistic Load Flow

    Publication Year: 1974 , Page(s): 752 - 759
    Cited by:  Papers (139)
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    The paper describes a method for evaluation of power flow which takes into consideration uncertainty of node data. The essence of the method is that the net loads are given as a set of values together with additional information on the frequency of its accuracy. The described mathematical model and the practtical application are discussed and an example given. View full abstract»

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  • Commutation by Armature Induced Voltage in Self-Controlled Synchronous Machines

    Publication Year: 1974 , Page(s): 760 - 766
    Cited by:  Papers (5)
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    A self-controlled synchronous machine drive system consists of a frequency converter, a control loop utilizing ashaft angle sensor as the primary control input, and a conventional synchronous machine. The static and dynamic characteristics of the system are similar to those of a dc machine. View full abstract»

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  • Stability Performance of 555 MVA Turboalternators - Digital Comparisons with System Operating Tests

    Publication Year: 1974 , Page(s): 767 - 776
    Cited by:  Papers (16)
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    Comparisons are made between operating tests on 555 MVA turboalternators, and computer simulations of these machines connected to a complex power network. The simulations were performed using two sets of alternator stability data -one set calculated on the basis of standard ANSI definitions, and the second set derived from appropriate field measurements on the alternators, using frequency response techniques. View full abstract»

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  • Synchronous Machine Operational Impeadances From Low Voltage Measurements at the Stator Terminals

    Publication Year: 1974 , Page(s): 777 - 784
    Cited by:  Papers (23)
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    Models of a synchronous machine for use in stability studies have been derived by measurements off-line at standstill. The method involves accurate determination of magnitude and phase of the impedance as seen at the stator terminals, for a range of frequency from 0.005 to 100 Hz. The data obtained pertains particularly to establishment of parameters for equivalent rotor circuits of varying degrees of complexity. View full abstract»

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  • Studies on an SCR Controlled Variable Speed DC Shunt Motor

    Publication Year: 1974 , Page(s): 785 - 792
    Cited by:  Papers (5)
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    This paper describes the analytical and experimental studies on a variable speed dc shunt motor driven by a single phase full-wave rectified power supply using SCRs. The studies comprise torque-speed characteristics and system stability. The expressions derived in the paper can be gainfully employed in designing such speed control circuits. View full abstract»

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  • Rating, Capabilities, and Operation of Combustion Gas Turbine Driven Generators

    Publication Year: 1974 , Page(s): 793 - 802
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    Combustion gas turbine driven generators, now widely used for both utility and industrial power generation, require output characteristics that are properly matched to the prime movers' capabilities at varying ambient temperatures as well as the varying turbine combustion temperatures. This paper reviews the requirements for securing such a match and the methods of determining the operating capabilities of such generators, as proposed for the forthcoming ANSI Standard C50,14. View full abstract»

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  • Approach to Experimental Electric Power Engineering Education-II

    Publication Year: 1974 , Page(s): 803 - 811
    Cited by:  Papers (6)
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    Several examples are presented to illustrate the ease with which the fundamental principles underlying transient inrush currents, ferroresonance phenomena, neutral instability, and series capacitor induced self-excitation in generators can be demonstrated experimentally in the fractional horsepower machinery laboratory described in an earlier paper. View full abstract»

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  • Remotely Multiplexed Data Acquisition for Media Systems

    Publication Year: 1974 , Page(s): 812 - 819
    Cited by:  Papers (1)
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    The MEDIA digital process control system providing a comprehensive approach to computer control, centralized display, and operator intervention is briefly reviewed. This system consists of a range of modules for encoding individual measurements, generating individual loop control functions, and adjusting individual regulating elements on a continuous basis without using sampling techniques. View full abstract»

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  • Optimal Power Dispatch

    Publication Year: 1974 , Page(s): 820 - 830
    Cited by:  Papers (53)
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    This paper presents an economic dispatch procedure for allocating generation in a power system by the use of the Jacobian matrix. The major advantage of the procedure over other optimal dispatch procedures is its inherent simplicity and rapid convergence behavior which are characteristics particularly omportant for on-line implementation. Results obtained from an investigation of its convergence for the 118 bus IEEE system are given. Comparisons with the classical approach are conducted and logic for on-line implementation is presented. View full abstract»

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  • The Apple Grove 750 kV Project Statistical Analysis of Audible Noise Performance of Conductors at 775 kv

    Publication Year: 1974 , Page(s): 831 - 840
    Cited by:  Papers (16)
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    This paper presents the results of a statistical anaylsis of conductor corona generated audible hoise as measured at the Apple Grove 750 kV Test Project, a joint field investigation sponsored by the American Electric Power Service Corporation and the Westinghouse Electric Corporation. A comparison of simultaneous audible noise data is made on three sizes of four conductor bundles [diameter of 1.382 in. (35.1 mm), 1.196 in. (30.4 mm), 1.0 in. (25.4 mm)]. Also a correlation is given of simultaneous readings of audible noise, radio noise and corona loss. View full abstract»

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  • Induction Machine Analysis for Arbitrary Displacement Between Multiple Winding Sets

    Publication Year: 1974 , Page(s): 841 - 848
    Cited by:  Papers (87)
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    The steps in t he applied voltages of a three-phase, inverter-induction motor drive system cause undesirable pulsations in motortor By using multiple inverters connected to a multiphase machine with appropriate winding displacements, significant improvement in system performance is possible. The winding displacements required, however, are not necessarily the symmetrical displacements used in standard multiphase machines. This paper sets forth an improved method for analyzing many types of unsymmetrical, as well as symmetrical, multiphase induction machines. The simulation of a 7.5-hp induction machine with two three-phase sets of stator windings fed from two six-step inverters illustrates the application of the method of analysis and shows how the machine torque characteristic may be improved by proper spacing of the winding sets. View full abstract»

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  • Hybrid-Parameter Models of Synchronous Machines

    Publication Year: 1974 , Page(s): 849 - 858
    Cited by:  Papers (2)
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    The classical two-axis model of the synchronous machine governed by Park's equations is expanded by' viewing the magnetic-field couplings along each axis as multiports characterized by typical matrices whose elements are pertinent open-circuit, short-circuit, hybrid parameters and system functions associated with specific port constraints. Four equivalent state models are presented. A hybrid dynamical model that uses the "constants" of the machine and represents rotor currents and fluxes by equivalent voltages is developed in the forms of state equations and analog computer representations as well as phasor diagrams based upon ignoring armature dynamics. View full abstract»

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  • Fast Decoupled Load Flow

    Publication Year: 1974 , Page(s): 859 - 869
    Cited by:  Papers (455)
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    This paper describes a simple, very reliable and extremely fast load-flow solution method with a wide range of practical application. It is attractive for accurate or approximate off-and on-line routine and contingency calculations for networks of any size, and can be implemented efficiently on computers with restrictive core-store capacities. The method is a development on other recent work employing the MW-¿/ MVAR-V decoupling principle, and its precise algorithmic form has been determined by extensive numerical studies. The paper gives details of the method's performance on a series of practical problems of up to 1080 buses. A solution to within 0.01 MW/MVAR maximum bus mismatches is normally obtained in 4 to 7 iterations, each iteration being equal in speed to 1¿ Gauss-Seidel iterations or 1/5th of a Newton iteration. Correlations of general interest between the power-mismatch convergence criterion and actual solution accuracy are obtained. View full abstract»

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  • Effects of Zero Sequence Modeling and Transposition on Switching Surge Overvoltages

    Publication Year: 1974 , Page(s): 870 - 877
    Cited by:  Papers (5)
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    Zero-sequence frequency dependent parameters for a transmission line with both ground wires and earth return paths and the effects of nontransposition are modeled on an analog transmission system simulator. The effects of this detailed modeling on the overvoltages experienced by a 200 mile 765 kV transmission system. link are investigated, for a variety of switching surge and fault initiation operations, in terms of the resulting overvoltage probability density distributions. View full abstract»

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  • Natural Pollution Test of Insulators Energized with DC High Voltage

    Publication Year: 1974 , Page(s): 878 - 883
    Cited by:  Papers (12)
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    Various types of insulators have been energized with ±250 kV dc voltage and exposed to natural conditions by the seaside continuously. Salt deposit density and flashover phenomenon of these insulators have been investigated extensively for about two years. According to the results obtained so far, the influence of dc voltage application on the salt deposit density was not so notable as expected, while the effect of insulator types on the voltage withstand strength was greater than anticipated. View full abstract»

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  • A New Decoupled Load Flow Method

    Publication Year: 1974 , Page(s): 884 - 891
    Cited by:  Papers (1)  |  Patents (1)
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    A quick, reliable and new method for solivng the load flow problem in electrical power systems is presented. It is called the decoupled voltage vectors and Newton's method. The method has advantages over Newton' s method in terms of computer storage, speed and reliable convergence. It also has advantages over all other known methods in terms of computer storage, and is as reliable convergent and accurate as the voltage vectors method. View full abstract»

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  • Electromagnetic Effects of Overhead Transmission Lines Practical Problems, Safeguards, and Methods of Calculation

    Publication Year: 1974 , Page(s): 892 - 904
    Cited by:  Papers (16)
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    This paper summarizes practical problems associated with electromagnetic currents induced by high voltage transmission lines. It deals with the safeguards necessary to counteract these currents and develops a method of calculation of electromagnetically induced voltages and currents. View full abstract»

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  • Radio Noise Meter Response to Random Pulses by Computer Simulation

    Publication Year: 1974 , Page(s): 905 - 915
    Cited by:  Papers (10)
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    The radio interference from high voltage transmission lines is generally measured using either the CISPR or the ANSI type of instrument to give the quasipeak value and in some cases also the peak and average values, of the interference. However, because of the random and uncorrelated nature of corona generation on the transmission lines, the analysis of radio interference propagation can be made only in terms of rms quantities. In order to resolve this apparent inconsistency between the measurement and analysis of radio interference, the response of the conventional radio noise meters to random pulses is investigated using digital computer simulation. Some results are verified using a hybrid computer simulation, which represents more closely the detector output circuit of a radio noise meter. The results show that as the degree of randomness, both in amplitudes and separation intervals, of the pulses increases, the quasi-peak value becomes roughly proportional to the rms value. It is also shown that it is possible to predict, even with greater accuracy, the rms response of the radio noise meter from the measured quasi-peak and average responses. View full abstract»

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  • Coefficient of Variation of the Positive-Impulse Breakdown of Long Air-Gaps

    Publication Year: 1974 , Page(s): 916 - 927
    Cited by:  Papers (13)
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    Extensive impulse breakdown tests on long air-gaps show that the coefficient of variation C = ¿/U50% × 100% depends on the form of the impulse. Tests were performed on three different gaps of 3, 5.90 and 8.75 meters long. The value of C for each form of the impulse was estimated by applying approximately 700 shots at appropriate voltage levels. The procedure used allowed C to be estimated with a confidence interval, at the 95% level, in the order of ±0.1 C. View full abstract»

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  • Operation of Synchronous Generators in the Asynchronous Mode

    Publication Year: 1974 , Page(s): 928 - 939
    Cited by:  Papers (2)
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    The paper discusses some of the limiting factors associated with the asynchronous operation of synchronous generators. Expressions of the various quantities required for the theoretical analysis are derived on the basis of an idealized model of a generator which is connected to an infinite bus. The generator is assumed to be operating at a constant slip. The results obtained from the experimental investigations which have been conducted on a 5 kVA salient-pole synchronous generator under asynchronous operation, are presented. These experimental results are used to verify the validity of the model used for the theoretical analysis. The theoretical analysis is then applied to study the behaviour of a 45 MVA hydro-generator and of an 82.5 MVA turbo-generator when operating asynchronously with different modes of the field winding connections. Comments are made on the nature of the variations of asynchronous power, armature current, pulsating power, reactive power demand, field current and field voltage as functions of slip. View full abstract»

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  • A Comparative Study of the Corona Performance of Conductor Bundles for 1200 KV Transmission Lines

    Publication Year: 1974 , Page(s): 940 - 949
    Cited by:  Papers (25)
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    As part of a general study on the possible use of UHV transmission lines in the range of 1200 kV for the James Bay Project, the corona performance of four conductor bundles -6 ×1. 823", 6 ×1. 998", 8 ×1. 63 " and 8 ×1.823"-has been studied in outdoor test cages under conditions of heavy artificial rain and fair weather. The radio interference, audible noise and corona losses of the four conductor bundles have been measured in the test cages, and the corresponding long line levels have been evaluated. The results show that of the four bundles tested the 8 ×1.63" conductor bundle gives the best corona performance. However, ice loading conditions may dictate the use of a six conductor bundle, in which case the 6 ×1.823" conductor bundle seems to give a marginally acceptable corona performance. View full abstract»

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  • 69KV Ungrounded Neutral Tee Joints for Solid Dielectric Cable System

    Publication Year: 1974 , Page(s): 950 - 959
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    This reports the development, testing, installation, and operation of 69Kv ungrounded neutral tee joints for a crosslinked polyethylene (XLPE) cable circuit, which is the sole supply for a downtown urban renewal area in Lexington, Kentucky. The total circuit length is 3030 feet, consisting of three sections, the longest being 1630 feet. Conductor connections were made with a heat-fusion process. Joint dielectric consisted of self-amalgamating ethylene propylene tape. The circuit has been in operation since the late Spring of 1971. 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