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Power Apparatus and Systems, IEEE Transactions on

Issue 2 • Date March 1973

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Displaying Results 1 - 25 of 56
  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Publication Year: 1973 , Page(s): c1 - 848-b
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    Freely Available from IEEE
  • IEEE Power Engineering Society

    Publication Year: 1973
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    Freely Available from IEEE
  • Synchronous Generator Transient Control: Part I -Theory and Evaluation of Alternative Mathematical Models

    Publication Year: 1973 , Page(s): 417 - 422
    Cited by:  Papers (10)
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    This paper describes mathematical models of varying complexity for the digital computation of transient behaviour of generators and motors in a synchronous power system, and their application in the light of extensive studies which have been made on a model power system. The computed and measured responses to transient disturbances are compared and the representation of terms in the equations which substantially affect behaviour is discussed. View full abstract»

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  • Synchronous Generator Transient Control: Part II - Theory and Evaluation of New Control Techniques

    Publication Year: 1973 , Page(s): 423 - 432
    Cited by:  Papers (3)
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    This paper evaluates the application of bang-bang switching to the control of the system impedance presented to the generator, and proceeds to the evaluation of a similar form of control applied to excitation voltage. The general theory is explained, and both applications are supported by digital studies and experiments on a model power system. Attention is paid to the correlation between computed and measured responses and to the effects of erroneous switching times. View full abstract»

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  • Power System Spinning Reserve Determination in a Multi System Configuration

    Publication Year: 1973 , Page(s): 433 - 441
    Cited by:  Papers (4)
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    The application of probability methods to the spinning reserve area has been illustrated in several recent publications. This material has included the effects of unit deratings1, peaking and hot reserve equipment2 and the benefits associated with interconnected systems3. In the latter case, the effects of load forecast uncertainty and the consideration of unit derating levels were included in the two system interconnection studies. Results were shown for the Saskatchewan and Manitoba Power Systems3. This paper also presented a general approach to interconnection studies in which the assisting system is represented by an equivalent multi-level assistance unit. This equivalent reflects the units in operation and the available reserve in the assisting system and the existing transfer capability between the two systems. The transfer capability may not be a constant value as is normally used in system planning studies but may vary with system conditions. View full abstract»

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  • Load Analysis of Nonlinear Homopolar Inductor Alternators

    Publication Year: 1973 , Page(s): 442 - 448
    Cited by:  Papers (5)
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    For a more accurate load analysis of the Homopolar Inductor Alternator (HIA), a magnetic vector potential analysis must be used which considers the nonlinearities of the iron and the actual current density fields. A nonlinear quasi-Poissonian partial differential equation, subject to the appropriate boundary conditions, is defined to solve for the vector potential in the middle cross section of the alternator. The partial differential equation and boundary conditions are transformed into a set of partial difference equations which are solved numerically by a successive line-overrelaxation method. The magnetic induction, flux distribution and volt-ampere characteristic are obtained for a 95 KVA, 208/115 V, 3400 Hz experimental alternator. View full abstract»

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  • Magnetic Shunt for Three Phase Reactors

    Publication Year: 1973 , Page(s): 449 - 454
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    For three phase shunt reactors to function effectively in EHV power systems the behavior of the circuit reluctance must be known under all operating conditions. Difficulties have occurred in effectively designing electromagnetic circuits with multiple air gaps in shunt reactors. This paper describes design techniques for magnetic shunts which can be applied to three phase shunt reactors resulting in size and weight reduction. Performance characteristics of shunt reactors under imbalanced system conditions are presented and magnetic shunt performance for a 345 kV, 100 MVAR three phase shunt reactor is given. View full abstract»

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  • MW Response of Fossil Feuled Steam Units

    Publication Year: 1973 , Page(s): 455 - 463
    Cited by:  Papers (11)
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    The IEEE Working Group on Power Plant Response has been in existence under the joint sponsorship of three IEEE Subcommittees. These subcommittees are the Power Plant Controls Protection and Automation Subcommittee of the Power Generation Committee, the System Controls Subcommittee and Systems Operations Subcommittee of the Systems Engineering Committee. The purpose of the Working Group is to study the subject of power plant MW response characteristics in the context of their role in meeting normal load changes. View full abstract»

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  • Modeling and Testing of Valley Steam Plant Supplemental Excitation Control System

    Publication Year: 1973 , Page(s): 464 - 470
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2547 KB)  

    A computer model and small disturbance response of the Los Angeles Department of Water and Power Valley Steam Plant is reported. Operating equipment tests determined the generator voltage regulator computer model. The generator voltage regulator computer model is tested with and without supplementary control under various loading conditions. On-line test of the Valley Steam Plant verified the operating deficiencies indicated by the computer model. Supplementary excitation control was found to have a beneficial effect on intertied network operation, but may be detrimental with certain network configurations. View full abstract»

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  • Solar-Induced-Currents in Power Systems: Cause and Effects

    Publication Year: 1973 , Page(s): 471 - 477
    Cited by:  Papers (28)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1345 KB)  

    This paper summarizes a research effort investigating the effects of geomagnetic storms on electric power systems. Geomagnetic storms, which are caused by solar flares, can cause spurious quasi-dc currents in power systems; these are termed solar-induced-currents (SIC). A summary of SIC data recorded on over 30 power systems across the United States is presented, and power system effects are discussed. The important problem of internal localized heating in power transformers due to SIC is presented, as well as a consideration of possible methods of mitigation of the SIC. View full abstract»

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  • Digital Control Scheme for a Generating Unit

    Publication Year: 1973 , Page(s): 478 - 483
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1050 KB)  

    Computer applications in power systems have tended to evolve at the supervisory levels in system operation. Controls at the generation levels remain primarily an analog domain. To make the entire system operation flexible it is essential that the control devices be compatible. This points towards the application of computers as dedicated direct digital controllers at the primary control levels. This paper describes the development of an integrated and compatible scheme for complete digital control of a generating unit. The overall concept and details of a physical model being built to test the proposed control scheme are given. View full abstract»

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  • Isolated Phase Pipe-Type Cable in Aluminum-Fiberglass Pipe

    Publication Year: 1973 , Page(s): 484 - 493
    Cited by:  Papers (2)
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    The hysteresis losses inherent in the conventional high voltage pipe-type cable system can be avoided by the use of non-magnetic pipe. A new system is proposed consisting of single-phase cables in filament-wound epoxybonded fiberglass covered aluminum pipes. Investigation indicates the proposed system to be practicable, economically sound, and to offer a reasonable and feasible method of increasing the load capability of pipe-type cables. View full abstract»

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  • Flexible Superconducting Power Cables

    Publication Year: 1973 , Page(s): 494 - 505
    Cited by:  Papers (5)
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    In view of the fact that installation costs may represent up to half the investment in an underground cable system, it is desirable to develop concepts for superconducting cables which, from the beginning, promise to keep this expense to a minimum. Superconducting cable will be very light and, providing it is flexible, the cable should be capable of being pulled in long lengths. Two concepts for flexible superconducting cables are presented together with a discussion of expected performance in the system. View full abstract»

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  • Development of EHV Cross-Linked Polyethylene Insulated Power Cables

    Publication Year: 1973 , Page(s): 506 - 513
    Cited by:  Papers (4)  |  Patents (1)
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    To apply cross-linked polyethylene for EHV cable insulation, several cables are designed, and manufactured and their characteristics are measured. By manufacturing, normal cross-linked polyethylene are used for comparison together with special cross-linked polyethylene insulations which have been newly developed. It is found that non-carbon filled and voltage-stabilized insulations possess excellent properties in corona and treeing deterioration resistance, and electrical breakdown strength which indicate the possibility of application these cables to real service. Problems and aspects of plastic-insulated power cables for higher voltage grades, such as 275kV class, are discussed. View full abstract»

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  • High-Voltage Testing of a High-Capacity, Liquid-Nitrogen Cooled Cable

    Publication Year: 1973 , Page(s): 514 - 519
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (6421 KB)  

    In recent years, a number of research projects have been initiated to study the application of unconventional technologies to extend the capacity of underground power transmission systems. General Electric Corporate Research and Development has recently completed a three-year study of resistive cryogenic cable systems. This study was sponsored by the Edison Electric Institute, the Tennessee Valley Authority, and the American Public Power Association. The results of this research indicate that the application of cryogenic technology to the development of high-capacity underground transmission systems is within the scope of current technology, and should be economically competitive at single-circuit capacities over 3000 MVA. View full abstract»

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  • Future Transmission - Underground?

    Publication Year: 1973 , Page(s): 520 - 523
    Cited by:  Papers (1)
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    Future transmission systems will handle larger blocks of power and a greater percentage will be installed underground. Solutions to the present limitations on operating such systems are being developed and it is anticipated that the economies of size will reduce the competitive disadvantage. It is important that continued effort be directed in this field so that the necessary systems are developed. View full abstract»

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  • The Sequence-Matrix Analysis of Phase-Transformer Windings

    Publication Year: 1973 , Page(s): 524 - 532
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    Previous papers have shown how to design a phase transformer winding component, of order (n,k), to link any sequence component of order g of the n-phase system with any sequence component order f of the k-phase system. For a (7,5) phase transformer this means there may be up to 35 such distinct components of the winding matrix. View full abstract»

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  • Immediate Warning of Local Overheating in Electric Machines by the Detection of Pyrolysis Products

    Publication Year: 1973 , Page(s): 533 - 542
    Cited by:  Papers (13)  |  Patents (1)
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    A device employing an ion chamber has been developed for the sensitive, reliable, and very rapid detection of local ovetheatingin a gas-cooled electric machine before extensive damage can result. The device detects the presence of pyrolysis products generated by the thermal decomposition of organic materials such as insulations and polymers. The pyrolysis products include particles of the size of condensation nuclei (about 0.001 to 0.1 microns), and smaller, which have such a pronounced effect on the ion current in the ion chamber that a definite signal is obtained from a hot spot as small as one square inch in area in a large hydrogen-cooled generator. A considerable amount of test and operating experience has been acquired. View full abstract»

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  • A Theoretical Study of the Three Phase Salient Pole Type Generator with Simultaneous AC and Bridge Rectified DC Output-Part I

    Publication Year: 1973 , Page(s): 543 - 551
    Cited by:  Papers (17)  |  Patents (1)
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    This paper presents theoretical equations, describing the relations between the performance and design details of a three phase salient pole type generator with simultaneous AC and DC output, the latter being obtained by bridge rectification. The AC voltage is regulated and the DC voltage floats; however, the inverse condition is also included. The start and duration of DC commutation, all damper and field winding currents, the DC commutation current and both average, RMS and instantaneous DC and AC voltages are determined. View full abstract»

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  • A Theoretical Study of the Three Phase Salient Pole Type Genetaror with Simultaneous AC and Bridge Rectified DC Output-Part II

    Publication Year: 1973 , Page(s): 552 - 557
    Cited by:  Papers (1)
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    The equations derived in Part I of this paper are applied numerically to an actual generator design. The results are shown in performance curves, demonstrating the relations between AC and DC loading and the angle of start of commutation, commutation duration, the average field current, the internal generator angle and the RMS, average and instantaneous AC and DC voltages. Also, the influence of DC commutation and the relative spacing between the AC and DC stator windings upon the deformation of the AC voltage is shown. View full abstract»

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  • Optimization of Insulators for Gas Insulated Systems

    Publication Year: 1973 , Page(s): 558 - 564
    Cited by:  Papers (12)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2346 KB)  

    The general problem of which insulator configuration is best for gas-insulated systems is considered. A smooth disc is compared with both a corrugated disc and a cone and the cone is seen to have considerable potential. Impulse and switching surge voltages are more severe than 60 Hz when contamination is present on the insulators. When insulators are contaminated, the dielectric strength cannot be increased by increasing pressure. View full abstract»

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  • Threshold and Dynamic Characteristics of Relays Using Multiple-Input Comparators

    Publication Year: 1973 , Page(s): 565 - 573
    Cited by:  Papers (2)
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    In this paper mode of operation of multiple-input moving-coil relay with fully rectified inputs, transistor block average phase comparator and rectifier bridge amplitude comparator are analysed. Methods for obtaining special threshold characteristics of elliptical, hyperbolic, etc. form and composite threshold characteristics formed by the intersection of straight lines, circles, etc. are shown and examples given. In each case the inherent dynamic performance of the relay, in relation to power system conditions, is determined in order to see its suitability for application. View full abstract»

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  • Effects of Synchronous Machine Modeling in Large Scale System Studies

    Publication Year: 1973 , Page(s): 574 - 582
    Cited by:  Papers (37)
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    A study was made of the accuracy of utility power system stability simulations, as affected by the complexity of the synchronous generator models and the data used with the models. The investigation was performed by simulating the operation of a representative multimachine power system with many combinations of disturbance, initial load, system stiffness, model detail and model data. The findings from this study provide guidelines for the selection of the simplest computational machine models for use in large scale stability analyses, with the goal of minimizing the cost of computer usage while assuring sufficient accuracy of the results. Recommendations are made for selecting machine data more suitable for use in stability studies than the standard machine data. View full abstract»

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  • Nonlinear Theory of Turboalternators Part I: Magnetic Fields at No-Load and Balanced Loads

    Publication Year: 1973 , Page(s): 583 - 591
    Cited by:  Papers (23)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1538 KB)  

    The method of finding flux plots in the cross section of salient pole rotating machines is extended to large, internally cooled turbogenerators. The relaxation procedure used by the authors in former papers [1,2,3] is assumed to be known to the reader and is not reviewed here. The grid systems for the partial differential equations are described in detail for a Westinghouse Electric Corp. 200 MVA, 15 kV, wye-connected, four-pole, 1,500 r/min, 50 Hz generator. Flux plots in the cross section of the alternator and the distribution of the radial magnetic induction on the stator bore are determined at no-load, three-phase short circuit, and at balanced lagging and leading loads. Available test data compare well with calculated results. View full abstract»

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  • Nonlinear Theory of Turboalternators Part II. Load Dependent Synchronous Reactances

    Publication Year: 1973 , Page(s): 592 - 599
    Cited by:  Papers (23)
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    The method in Ref. [1] is used to determine synchronous reactances for the turbogenerator at operating conditions in Part I [2]. The influence of saturation on the direct and quadrature reactances is studied and the difficulties caused by linear parameters in nonlinear theory are discussed. A modified phasor-diagram taking the small angles ¿d and ¿q into account is developed. The results are given for a Westinghouse Electric Corp. 200 MVA, 15 kV, wye-connected, four-pole, 50 Hz generator. Available test data are compared with computations. 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