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Power Apparatus and Systems, IEEE Transactions on

Issue 4 • Date July 1976

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Displaying Results 1 - 25 of 59
  • [Front cover and table of contents]

    Publication Year: 1976 , Page(s): c1
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    Freely Available from IEEE
  • Analysis of the discharge development of a positive rod-plane gap in air

    Publication Year: 1976 , Page(s): 1019 - 1027
    Cited by:  Papers (12)
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    An improved method is suggested for calculating and correlating the burst pulse and streamer onset voltages of a positive rod-plane gap in air. The computed results indicate that the positive corona in rod-plane gaps always starts with burst pulses in agreement with experiment. The conditions of burst pulse-streamer and burst pulse-glow transitions are also discussed. It is found -for the first time-that the photoelectron distribution within the ionization zone, which depends upon the gap geometry, plays an important role in deciding the discharge development from burst pulses. View full abstract»

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  • Computational complexity in power systems

    Publication Year: 1976 , Page(s): 1028 - 1037
    Cited by:  Papers (20)
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    The problem of estimating the increase in computational effort as the system size n increases is studied for methods requiring the solution of Ax = b, where A is sparse and topology-symmetric. The expected value of the total number of upper triangular nonzero elements after factorization is assumed to grow as n1+γ. The expected computational effort for the factorization itself is shown to grow as n1+2γ, while the one for each repeat solution is shown to grow as n1+γ. Values of γ for typical power systems are experimentally determined by generating a variety of random networks and ordering the resultant matrices according to "scheme 2". For typical power systems a reasonable value for γ is 0.2. Therefore, methods requiring repeated refactorization of A (such as Newton's method) can be expected to increase as n1.4, while methods requiring merely repeat solutions (such as fast decoupled methods) can be expected to increase as n1.2. Several other important comparisons are included. View full abstract»

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  • Operating experience with bulb units at the rance tidal power plant and other French hydro-power sites

    Publication Year: 1976 , Page(s): 1038 - 1044
    Cited by:  Papers (3)
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    A brief review of large bulb unit development in France since 1957 is followed by a detailed description of the Rance tidal power plant and a summary of other French bulb unit plants, mainly located on the Rhone and Rhine Rivers. Operating results are summed-up and the performance of present operational bulb units analysed, including a discussion of the principal operating difficulties experienced and how they have been overcome. The report ends with an appraisal of the main advantages and drawbacks of bulb units compared to conventional Kaplans, and a few words on future development. View full abstract»

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  • Design criteria for laminated segmental rotor rims of hydrogenerators part I

    Publication Year: 1976 , Page(s): 1045 - 1053
    Cited by:  Papers (1)
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    The elastic behavior of laminated rotor rims is discussed, in order to illustrate the premises from which rigorous methods may be developed for determining the stresses on rotor rims main components i.e. steel plates and bolts. The article basically deals with the most classic amongst the various piling patterns used in construction of hydrogenerators. View full abstract»

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  • Design criteria for laminated segmental rotor rims of hydrogenerators part II

    Publication Year: 1976 , Page(s): 1054 - 1061
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    An account is given of the results achieved through application to different piling patterns of the calculation method presented in Part I. Some design criteria are outlined and the limits are set forth which the stresses should not exceed. View full abstract»

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  • Discussion of "Generator and power system performance with the GENERREX excitation system"

    Publication Year: 1976 , Page(s): 1062 - 1063
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    Freely Available from IEEE
  • A computer study of battery energy storage and power conversion equipment operation

    Publication Year: 1976 , Page(s): 1064 - 1072
    Cited by:  Papers (7)
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    This paper presents and discusses results from a computer simulation of a battery energy storage/converter system connected to a representative utility substation. Switching of load, voltage waveforms, voltage levels, fault conditions, and power flow reversal are investigated for both line- and forced-cornmutated converters in the application. The interactions among the battery, the converter and its controls, and the substation are discussed. The investigations have pointed out areas in which further consideration must be given to component selection for the battery/utility interface equipment, for example, dc reactor sizing, harmonic filtering, power factor control, thyristor firing control, and dc current interruption. View full abstract»

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  • Onset or breakdown voltage reduction by electrode surface roughness in air and SF6

    Publication Year: 1976 , Page(s): 1073 - 1079
    Cited by:  Papers (19)
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    This paper describes investigations on the influence of surface roughness on the onset or breakdown voltage in air and SF6. Applying the streamer theorie of electrical discharges the role of ionization characteristic, gas pressure, shape and size of electrode surface protrusions is discussed. The maximum allowable field gradients of electrode surfaces with hemispherical, spherical, and filamentary irregularities were computed in air and SF6. Pictures of a sparked electrode surface, showing slze and shape of surface roughness, were made using an electron scanning microscope. A comparison between computed breakdown field gradients of rough electrodes and experimental results obtained by employing different electrode configurations in a wide pressure range confirmed the theoretical considerations. View full abstract»

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  • Standby and emergency power supply of German nuclear power plants

    Publication Year: 1976 , Page(s): 1080 - 1090
    Cited by:  Papers (1)
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    In ensuring nuclear safety by the utmost reliable supply of power to all safety related systems under all emergency conditions, U.S. power plants rely heavily on redundant offsite power sources. For years German plant designers have been and are still placing a greater emphasis on onsite power sources in the form of highly redundant sophisticated Diesel generating sets. This difference in fundamental design philosophy and the concepts underlying the Diesel power systems incorporated into German nuclear stations are discussed. View full abstract»

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  • Minimization of the cost of an electric transmission line system

    Publication Year: 1976 , Page(s): 1091 - 1098
    Cited by:  Papers (3)
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    This paper presents a method for determining the design parameters for an electric transmission line system. A mathematical model is formulated using regression analysis to relate system costs and requirements to the system design parameters. In general, this mathematical model is both nonlinear and nonconvex. Solutions obtained for a specific problem using a nonlinear programming computer code are presented. Although the results are applicable only to this specific problem, the method of analysis is applicable to the general transmission line design problem. View full abstract»

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  • Operation of an isolated hydro plant supplying an HVDC transmission load

    Publication Year: 1976 , Page(s): 1099 - 1104
    Cited by:  Papers (1)
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    Manitoba Hydro's Kettle Generating Station, situated on the Nelson River in northern Manitoba, is an isolated hydro-electric plant supplying power directly to Radisson HVDC rectifier station. Some characteristics of this transmission system require the control systems to have special features to ensure successful operation of the generating station. The important system characteristics, the problems they can cause and the solution of the problems through control features are described. View full abstract»

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  • Audible noise performance of the first three-phase ultra-high voltage transmission test line at EPRI's project UHV

    Publication Year: 1976 , Page(s): 1105 - 1114
    Cited by:  Papers (5)
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    A three-phase ultra-high voltage transmission test line at EPRI's Project UHV was energized in January 1975. Analyses of the audible noise performance of the first six-months of energization are presented. The result of long-term energization during foul-weather are reported in terms of cumulative frequency distributions, lateral profiles and frequency spectra. Audible noise variations with voltage in rain and fair weather are also presented. Results are compared with calculations made on the basis of single-phase tests. Good agreement between measured and calculated performances is demonstrated. View full abstract»

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  • The Katiza model

    Publication Year: 1976 , Page(s): 1115 - 1122
    Cited by:  Papers (2)
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    The KATIZA model is designed with the aim of optimizing investments in electric generation equipment. It is based on: - management simulation supplying the annual operating and failure costs of any prospective optimum structure of a generation system, - investment optimization permitting determination of an optimal strategy for the equipment of a production system over a given time period. The model carries out a schematization of reality by means of hypotheses that narrow down the field of application and make it more specific for certain types of problems. A special application of the KATIZA model makes it possible to assess the relative importance of the uncertainties of consumption and of thermal and hydraulic availability in determining the optimal size of an electric generation system. View full abstract»

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  • AC and DC transmission comparison for Kaiparowits coal-fired generation plant

    Publication Year: 1976 , Page(s): 1123 - 1135
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    This paper contains various technical and economic comparisons of long distance EHV AC and DC transmission expansion plans for remote generation plants. The future Kaiparowits coal-fired plant located in Southern Utah is used as the case study to evaluate dynamic system performance, subsynchronous resonance, economics, and transmission system reliability. The reliability analysis outlines a comparison of AC versus DC transmission system reliability and quantifies the results in terms of economics. Because of the difficulties involved with the comparison of transmission alternatives from a reliability standpoint-especially when comparing AC and DC alternatives, a conventional generation resource reliability program has been applied in a new manner to quantitatively assess transmission reliability. This is a departure from standard transmission planning practice and is the basic significance of this paper. View full abstract»

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  • Universal analog computer model for three-phase controlled rectifier bridges

    Publication Year: 1976 , Page(s): 1136 - 1144
    Cited by:  Papers (1)
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    This work concerns an analog computer simulation of full-wave controlled rectifier bridges, which are fundamental for any conversion of alternating current to direct current. The control of rectifier bridges is realized with the aid of logical components. In spite of the comparative simplicity of the power scheme, the transitional processes in converters can be complicated, particularly when the converter is operated abnormally. The simulation of rectifier bridges presents some difficulty when using a potentially unstable model. Usually instability of a model occurs because of the presence of closed loop circuits which have an even number of amplifiers or because of inaccurate mathematical descriptions of the real system. Practically until recently there have been no universal analog computer diagrams to study the electromagnetical processes in converter bridges under stationary, transitional and emergency conditions of the rectifier bridge. A method akin to that used in servosystems is used for the simulation of the rectifier bridges. Only one analog computer diagram is obtained and it gives stable solutions for any condition of the bridge. The accuracy of the simulation was determined by comparing the computer outputs to recordings taken from an actual system used in The Institute of Machine Construction, Zaporozhje, U.S.S.R. The simulation resulted in good correlation between computer solutions and experimental data for a wide set of problems in the area of energy conversion systems. View full abstract»

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  • Humidity influence on switching impulse breakdown of a 50 cm rod-plane gap

    Publication Year: 1976 , Page(s): 1145 - 1152
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    Humidity influences the breakdown characteristics of air gaps by its effect on the predischarge phenomena. For an understanding sufficient to answer engineering problems details of physical events must be known, which can be explained by the use of advanced measuring techniques. The results found in this way are applicable also to air gaps with great distances. View full abstract»

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  • Parameter identification and verification of low order boiler models

    Publication Year: 1976 , Page(s): 1153 - 1158
    Cited by:  Papers (2)
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    The results of studies performed for the verification and parameter identification of a low-rder boiler model from actual operating data are presented. The model chosen for identification and verification is a linear fourth order system with eight unknown parameters and two inputs and two outputs. The model is intended for use in stability studies over the time interval of approximately one-half minute to a few minutes following a disturbance. View full abstract»

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  • Theoretical and statistical dependence of the transformer test regime on the stress-life characteristics of insulation systems

    Publication Year: 1976 , Page(s): 1159 - 1164
    Cited by:  Papers (1)
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    This paper reviews the proposal submitted by the IEEE Working Group for the Revisions of Dielectric Test Standards for Power Transformers and the technical aspects of stress-time endurance (life), particularly its rate as affected by field divergence, gassing stress, and discharge inception and extinction levels. A comparison of the effects of test stresses on insulation endurance is made, accompanied by a recommendation regarding future proposals for changes in test procedures. View full abstract»

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  • Investigation on the physical phenomena around current zero in HV gas blast breakers

    Publication Year: 1976 , Page(s): 1165 - 1176
    Cited by:  Papers (28)
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    An axially blown arc is studied under physical conditions typical of HV circuit breakers. The experiment is especially designed to produce a stable and reproducible arc with good accessability for diagnostics. After a stationary phase the current is ramped down with adjustable slope. The vicinity of current zero is especially investigated. For the first time, the most effective recovery zone is localized and its physical parameters are evaluated. The limiting curve for thermal reignition is determined. Based on the observed phenomena a theoretical description is derived which explains quite well the experimentally known extinction characteristics of this type of arc. View full abstract»

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  • The history and philosophy of supervisory control of TVA hydro plants

    Publication Year: 1976 , Page(s): 1177 - 1181
    Cited by:  Papers (1)
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    The first eight hydroelectric generating stations built by TVA were staffed with both electrical operators and hydraulic operators and operating costs were high. After successful operation of two single unit plants via supervisory control, it was decided for economic reasons that new plants would be either supervisory controlled or certain features would be provided so only electrical operators would be required. Also existing stations were to be converted to one of these types of control. As a result, TVA now has 4 plants which were converted to supervisory control, 8 plants built equipped for supervisory control, 2 plants built to require only electrical operators, and 13 plants which were modified to eliminate the need for hydraulic operators. After many years of successful operation of these control systems, design work has now begun, in the interest of system efficiency and economy, on system-wide supervisory control from five area dispatch control centers. Initially, four existing hydro plants and a new pumped-storage plant will be incorporated into this control system. View full abstract»

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  • A high speed HVDC circuit breaker with crossed-field interrupters

    Publication Year: 1976 , Page(s): 1182 - 1193
    Cited by:  Papers (8)
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    A novel HVDC circuit breaker is described which utilizes crossed-field interrupters in a sequential switching mode. The breaker and its components were tested in an inductive energy storage facility at levels of 1000 A, 100 kV and performed satisfactorily. View full abstract»

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  • Electric power engineering educational resources ߞ 1973-1974

    Publication Year: 1976 , Page(s): 1194 - 1201
    Cited by:  Papers (7)
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    This third biennial [1,2,4] committee report covers results of a survey of Electric Power Engineering Educational Resources at ECPD (Engineers Council for Professional Development) accreditied universities in the United States of America for the academic year 1973-1974. This report includes a listing of faculty active during the subject year, their level of academic involvement and professional experience, together with information on undergraduate student enrollment in various subject matter. Also included is information concerning graduate student enrollment in various subject matter, degrees granted and research funding support activity. View full abstract»

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  • Working group report on protection of large generator drive, simple cycle gas turbine stations

    Publication Year: 1976 , Page(s): 1202 - 1209
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    Lists are given in this paper of minimum recommended and some optional trips and alarms for large generator drive simple cycle gas turbine stations. Subjects relating to protective philosophy are discussed and advantages/disadvantages listed to provide the reader with a balanced view of plant protection. View full abstract»

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  • List of transmission and distribution components for use in outage reporting and reliability calculations

    Publication Year: 1976 , Page(s): 1210 - 1215
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (464 KB)  

    This paper identifies composite systems for which reliability calculations are performed and major components of transmission and distribution equipment for which outage data are recorded. Descriptions such as design and operating characteristics, type, application, etc. which can be used to classify or group components in analyzing outage data are also suggested. The important requirements of an outage reporting procedure are discussed in this report. The information in this paper can be used as a guide by the utility industry in setting up a standard transmission and distribution equipment data bank. 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