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Power Apparatus and Systems, IEEE Transactions on

Issue 6 • Date Nov. 1979

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Displaying Results 1 - 25 of 59
  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Publication Year: 1979 , Page(s): c1 - 2354-an
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    Freely Available from IEEE
  • IEEE Power Engineering Society

    Publication Year: 1979 , Page(s): c2
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    Freely Available from IEEE
  • Electric Field Induction of Long Objects - a Methodology for Transmission Line Impact Studies

    Publication Year: 1979 , Page(s): 1841 - 1852
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3481 KB)  

    Electric field induction from extra high voltage (EHV) transmission lines is analyzed for long objects, showing that objects perpendicular to the transmission line have a significantly reduced induction as compared with parallel objects. A theoretical approach is presented and is verified with measurements on long wires and large vehicles. An approach for the analysis of impact on people is suggested by examples. Examples are presented for long fences and large vehicles. The implications of the National Electric Safety Code (NESC) limit of 5 mA is evaluated for perpendicular and parallel objects including the largest trucks permitted in each state in the United States. View full abstract»

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  • Long Term Audible Noise and Radio Noise Performance of American Electric Power's Operating 765 KV Lines

    Publication Year: 1979 , Page(s): 1853 - 1859
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3468 KB)  

    This paper describes the instrumentation and reports the statistical analysis of conductor corona generated audible noise and radio noise measured at two recording stations. These stations are located near operating 765 kV lines of American Electric Power. Data covers a four year period when lines were energized at 705 kV, 725 kV, 750 kV and 760 kV. A comparison is made between the operating lines and a similar line at the Apple Grove 750 kV Test Project. View full abstract»

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  • Protective Performance of Metal Oxide Surge Arrester Based on the Dynamic V-I Characteristics

    Publication Year: 1979 , Page(s): 1860 - 1871
    Cited by:  Papers (10)  |  Patents (1)
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    Metal oxide surge arrester (MOA) is constructed by a series connection of zinc oxide elements having a highly nonlinear resistance. A simple equivalent circuit is proposed to express the dynamic characteristics of zinc oxide element. Using this dynamic model, the effect of lightning strokes to gas insulated substations (GIS) is analized by a computer simulation under various conditions. The results are summarized in a diagram from which the length of GIS bus to be protected by MOA can be determined. Comparing the overvoltage protection performance of MOA with that of a conventional arrester, MOA is found to be more suitable for GIS application. View full abstract»

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  • First Supplement to a Bibliography for the Study of Subsynchronous Resonance Between Rotating Machines and Power Systems

    Publication Year: 1979 , Page(s): 1872 - 1875
    Cited by:  Papers (15)  |  Patents (2)
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    This is the First Supplement to "A Bibliography for the Study of Subsynchronous Resonance Between Rotating Machines and Power Systems." This Supplement follows the organization of the first report with some modifications of categories. View full abstract»

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  • Generation Rescheduling and Load Shedding to Alleviate Line Overloads-Analysis

    Publication Year: 1979 , Page(s): 1876 - 1884
    Cited by:  Papers (44)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2828 KB)  

    This paper deals with the problem of alleviating line overloads in a power system by generation rescheduling and load shedding. Mathematical models based on linearized relationships between line currents and state variables, and bus injected powers and state variables are systematically developed to considerthe line overload problem. Two algorithms are described to solve the models in the Newton-Raphson and decoupled load flow programs. The techniques developed can beused to determine the generation rescheduling and load curtailment pattern to alleviate line overloads. The approaches presented in this paper shouldprove useful in system security studies and reliability studies for examining line overload alleviation with minimum computational expense. The analytical results can also serve as an operating guide to the system dispatcher. In a companion paper, the effectiveness of these techniques in alleviating line overloads in several test systems is investigated. View full abstract»

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  • New Dual-Element Current-Limiting Power Fuse with Full Protection Capability Against any Fault Current

    Publication Year: 1979 , Page(s): 1885 - 1894
    Cited by:  Papers (2)
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    A newly developed current-limiting fuse , called the universal fuse , has dual fuse-elements connected in series: one is made of gold-silicon alloy with a low melting point and covered with polytetrafluorethylene arc-extinguishing tube , and the other is an ordinary ribbon-like silver element . The gold alloy element performs for low-current interruption , and the silver one , principally for high-current interruption . This fuse can be applied for reliable protection against a full-range fault current from a minimum fusing current to a heavy short-circuit fault current . It has such practically excellent properties as low temperature rise , high reliability against short-time and long-term deteriorations , and feasible protection co-ordination. View full abstract»

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  • A High Speed, Discriminating Generator Loss of Excitation Protection

    Publication Year: 1979 , Page(s): 1895 - 1899
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1861 KB)  

    A new loss of excitation protection scheme has been devised in order to minimize the system voltage disturbance caused by excitation failure. It was designed specifically to prevent tripping of a sensitive load adjacent to a generating station with only one unit in operation. Besides meeting the special requirements of the single unit environment, the scheme appears to have some advantage over conventional loss-of-field protection when used in a station with more than one unit in service. The relay described has been in service for two years, complementing conventional protection, at a large nuclear plant which now has three units in operation. The relay is being modified to include limited over-excitation protection for future applications. View full abstract»

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  • Modelling for Lightning Performance Calculations

    Publication Year: 1979 , Page(s): 1900 - 1908
    Cited by:  Papers (24)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2969 KB)  

    Presently used analytical methods for predicting the lightning performance of transmission lines and substations give satisfactory agreement between calculated and observed results. This paper reviews the models employed in a suite of lightning performance computer programs developed at the University of Queensland in the period 1966 to 1975. View full abstract»

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  • An Improved Method for Calculating the Impulse Strength of Wood Porcelain Insulation

    Publication Year: 1979 , Page(s): 1909 - 1915
    Cited by:  Papers (13)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1036 KB)  

    This paper describes an improved method of predicting the breakdown voltage and volt-time characteristic of wood-porcelain combinations. The model accounts for the different voltage waveshapes that stress each element of the combination. The integration method is used to evaluate the breakdown and the time to breakdown of each element, from which are derived the insulation strength and the volt-time characteristic of the combination. This method can reproduce laboratory results to within 10 percent for a wide range of wood-porcelain combinations. View full abstract»

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  • BPA 1100 kV Transmission System Development-Planning, Program, and Objectives

    Publication Year: 1979 , Page(s): 1916 - 1923
    Cited by:  Papers (5)
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    This paper summarizes current system planning studies for application of 1100 kV to the Pacific Northwest transmission system, the associated test and development program, and construction of two test lines. It compares 500 and 1100 kV costs and shows 1100 kV to be economical at loadings above 4,000-5,000 MW. The two test lines consist of 1200 kV Lyons Electrical Prototype Line at Lyons, Oregon, and the 1200 kV Moro Mechanical Test Line at Moro, Oregon. View full abstract»

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  • The Corona and Radio Interference Performance of the Nelson River HVDC Transmission Lines

    Publication Year: 1979 , Page(s): 1924 - 1936
    Cited by:  Papers (8)
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    Prior to construction of the Manitoba Hydro Nelson River DC system, the HVDC corona performance of the transmission lines was predicted from test line measurements made at NRC Ottawa in 1967-69. Radio interference, corona power loss and the effect of drag stringing were studied [1,2]. Since completion of the two 895 km (556 mile) lines in Manitoba in March 1971, radio interference measurements were made at various system voltages. This paper gives radio interference results and compares them with test line predictions. Measurements of combined corona and insulator leakage loss on the 895 km line were made also in April 1978. The results of loss tests are presented and compared with 1967-69 predictions. View full abstract»

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  • Transient and Small Signal Stability of a Superconducting Turbogenerator Operating With Thyristor Controlled Static Compensator

    Publication Year: 1979 , Page(s): 1937 - 1946
    Cited by:  Papers (19)
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    This paper presents a small signal and transient stability study of a superconducting alternator. Comparisons are made, in the dynamic performance, when employing a field forcing system with high ceiling voltages and when the alternator is equipped with a fast acting thyristor controlled static reactive power compensator at its terminals. In both schemes the influence of auxiliary stabilizing signals for different time constants ofthe machine shields is studied by using eigenvalue techniques. View full abstract»

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  • A Decision Methodology for Coal Inventory Optimization

    Publication Year: 1979 , Page(s): 1947 - 1957
    Cited by:  Papers (2)
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    The procurement of coal as a power plant fuel is formally treated in a decision analysis methodology to assess optimal purchasing and stockpiling strategies. The uncertainties which characterize future prediction of fuel burn, receipt, and market price are expressed in a probabilistic multiperiod inventory model. A dynamic programming optimization procedure of the decision problem is developed. The effects of forecasting uncertainties and price variations are examined in several case studies and the value of perfect information is estimated. View full abstract»

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  • BPA 1100 kV Transmission System Development-Environmental Studies

    Publication Year: 1979 , Page(s): 1958 - 1967
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (6210 KB)  

    Environmental studies are an integral part of the Bonneville Power Administration Lyons 1200-kV prototype line test program being conducted at Lyons, Oregon. Through the first two growing seasons following energization, these studies have documented the lack of significant impact of the facility on tree and crop growth, cattle, honeybees and wildlife. Douglas fir trees left growing near the line have experienced some damage due to induced corona which is similar to that documented for EHV lines. View full abstract»

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  • Estimation Algorithms for Large-Scale Power Systems

    Publication Year: 1979 , Page(s): 1968 - 1977
    Cited by:  Papers (17)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1994 KB)  

    The operation of large-scale power systems demands that the real-time monitoring, security, and control procedures can draw on a consistent and reliable set of data representing the measurements and the network parameters. This paper considers the enhancement of this data base through advanced estimation programs for the states and parameters of the network. The role of such programs and the different forms they can take are presented in a comprehensive and unified manner. This will assist the designer in the task of selection and development of a suitable algorithm for his system from a set of possible approaches. View full abstract»

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  • Computation of Potential at Surface Above an Energized Grid or Other Electrode, Allowing for Non-Uniform Current Distribution

    Publication Year: 1979 , Page(s): 1978 - 1989
    Cited by:  Papers (42)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2281 KB)  

    Equations presented in most papers on the computation of voltages at the surface of the earth near a buried energized electrode grid of bare wires are based on the assumption that leakage current density is the same at all points along the wire grid. This paper presents a method for allowing for the effects of variation of leakage current density caused by the proximity of parallel conductors, cross conductors, angled conductors, and end effects. Examples are presented showing the effect of the non-uniform leakage in some cases. The method given herein also can be used to compute surface voltages in the vicinity of electrodes composed of wires oriented at arbitrary angles, such as combinations of stars and polygons, and the resistance to ground of such electrodes. View full abstract»

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  • Circuit for the Dynamic Control of Magnetic Flux in Current Transformers

    Publication Year: 1979 , Page(s): 1990 - 1995
    Cited by:  Papers (2)
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    Incorrect relay operation has often been related to saturation of current transformers. In many cases, the obvious solution to this saturation problem is an increased core cross-section of the current transformers, in order to allow a larger flux amplitude. In this respect, the transient asymmetrical component of fault currents is one of the most determining factors governing the dimensioning of the core cross-section of current transformers. A new technique using the characteristics of asymmetrical fault currents, has been developed in order to achieve a dynamic control of the core flux, thus allowing a significant reduction of the required cross-section. It is shown theoretically and experimentally that, taking into account all accuracy requirements and overvoltage limitations, the flux control circuit achieves a net reduction of the core crosssection by a factor of at least 3, even in the worst conditions imposed by C.T. or system parameters. View full abstract»

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  • A Survey of Methods for Calculating Transmission Line Conductor Surface Voltage Gradients

    Publication Year: 1979 , Page(s): 1996 - 2014
    Cited by:  Papers (15)
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    This paper presents the results of a survey of methods for calculating transmission line conductor surface voltage gradients. The main objective of this survey is to obtain comparative data on the accuracy and the computational aspects of the different methods presently in use for calculating conductor surface voltage gradients. A total of thirteen typical transmission line configurations has been selected for the survey which elicited worldwide response. In addition to an analysis of the results, the paper also presents a brief review of the existing methods of calculation and a discussion of the accuracy requirements from a practical point of view. View full abstract»

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  • Sequential Objective Linear Programming for Generation Planning

    Publication Year: 1979 , Page(s): 2015 - 2021
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1083 KB)  

    Generation planning usually involves finding a generation expansion and operating policy that minimizes present worth cost while meeting projected demands and other imposed constraints. However, the planning process is becoming increasingly complex with a number of objectives becoming increasingly desirable. In addition to minimum revenue requirements, other possible objectives include minization of new power plant construction, maximization of reliability, minimization of public health hazard (e.g. via emitted pollutants), and minimization of environmental hazards (e.g. via heat rejected to bodies of water). View full abstract»

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  • Magnetohydrodynamic Power Generation: Program Planning and Status

    Publication Year: 1979 , Page(s): 2022 - 2029
    Cited by:  Papers (2)
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    This paper is concerned with the phased development of the MHD power system program and the development issues which are being addressed. System engineering considerations for the development logic and design criteria are established in terms of systems-emphasizing open cycle MHD-and components - combustor, generator, materials, seed recovery, emission control, magnets and power conversion systems. View full abstract»

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  • Automatic Generation Control Analysis With Governor Deadband Effects

    Publication Year: 1979 , Page(s): 2030 - 2036
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1565 KB)  

    Automatic Generation Control (AGC) stochastic performance, including effects of speed governor deadbands, is analyzed. Using Fast Fourier Transform techniques, Bonneville Power Administration real system data is compared with similar data from simulation. View full abstract»

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  • The Freezing Method for the Oil Stop in POF Cable Repair

    Publication Year: 1979 , Page(s): 2037 - 2046
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    A freeze chamber making effective use of Joule Thomson effect and a sub-chamber were developed to establish a freezing method for oil stop of POF cable. View full abstract»

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  • IEEE Reliability Test System

    Publication Year: 1979 , Page(s): 2047 - 2054
    Cited by:  Papers (489)
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    This report describes a load model, generation system, and transmission network which can be used to test or compare methods for reliability analysis of power systems. The objective is to define a system sufficiently broad to provide a basis for reporting on analysis methods for combined generation/transmission (composite) reliability. 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