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Power Apparatus and Systems, IEEE Transactions on

Issue 2 • Date Feb. 1981

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

    Publication Year: 1981 , Page(s): c1 - 928-b
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    Freely Available from IEEE
  • IEEE Power Engineering Society

    Publication Year: 1981 , Page(s): c2
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    Freely Available from IEEE
  • Transformation Methods in State Estimation - Existence, Uniqueness and Stability Theorems (A Geometric Approach)

    Publication Year: 1981 , Page(s): 449 - 458
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    For the first time widely recognized transformation methods are analyzed within a unifying theoretical framework. The existence, uniqueness and stability of the estimate have been investigated. The results constitute a practical tool for convergence studies and can be used to compare metering system configurations, different load situations, etc. View full abstract»

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  • A Practical Ground Potential Rise Prediction Technique For Power Stations

    Publication Year: 1981 , Page(s): 459
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  • Maintenance Scheduling Under Uncertainty

    Publication Year: 1981 , Page(s): 460 - 465
    Cited by:  Papers (4)
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    This paper introduces an extension of maintenance scheduling concepts to incorporate short-term load forecast uncertainty. Maintenance schedules thus derived are much more realistic for generation expansion planning models because they more accurately reflect decisions made during system operation. The method proposed arranges the maintenance schedule to level the risk exposure under uncertain weather outcomes with only a modest amount of revision of existing maintenance scheduling programs which level risk. View full abstract»

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  • A Transformer Thermal Duct Study of Various Insulating Fluids

    Publication Year: 1981 , Page(s): 466 - 473
    Cited by:  Papers (5)
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    This paper studies the impact of various insulating fluid properties on the thermal performance of a rectangular distribution coil design. The fluid properties are modeled as a function of temperature and studied in an oil duct flow model. The study demonstrates the significant impact of both the fluid properties and the duct design variables on the thermal performance of the coil. These two sets of variables are independent and therefore the duct design variables can be used to provide a specific thermal performance for any insulating fluid. This paper presents a model which can be used to quantify the relationship between the fluid properties and the duct design variables. View full abstract»

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  • Theoretical Considerations on Eddy Current Losses in Non-Magnetic And Magnetic Pipes for Power Transmission Systems

    Publication Year: 1981 , Page(s): 474 - 484
    Cited by:  Papers (11)
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    Formulas on eddy current losses in non-magnetic (¿s=1) and magnetic (¿s>1) pipes are derived from electromagnetic field theory. These formulas are given in the forms of precise and approximate solutions for both cases where conductors are placed inside and outside the pipe in any configuration. View full abstract»

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  • Characteristics of ACSR Conductors at High Temperatures and Stresses

    Publication Year: 1981 , Page(s): 485 - 493
    Cited by:  Papers (14)  |  Patents (5)
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    Based on the stress-strain and temperature elongation data obtained on ACSR conductors, a new method of sag calculation is presented to provide improved accuracy at higher temperatures and mechanical loads. Permanent elongation of steel cores at loads above 50 per cent of conductor UTS is found to be an important factor in calculating both the temporary high-temperature sags and permanent sags after heavy loading of steel cores. View full abstract»

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  • Excitation System Models for Power System Stability Studies

    Publication Year: 1981 , Page(s): 494 - 509
    Cited by:  Papers (108)  |  Patents (1)
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    Excitation system models suitable for use in large scale system stability studies are presented in this paper. With these models, most of the excitation systems currently in widespread use on large, system connected generators in North America can be represented. View full abstract»

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  • Switching Impulse Tests at Project UHV Using Longwave Fronts

    Publication Year: 1981 , Page(s): 510 - 517
    Cited by:  Papers (1)
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    The capabilities of Project UHV to apply switching surges to a test line are described. Switching surges with times to crest between 1000¿s and 4000¿s, similar in shape and magnitude to those which could occur on 1200 kV transmission lines have been generated. The initial results obtained on rod-plane gaps, conductor-to-tower, and conductor-to-grounded objects are described. View full abstract»

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  • Studies on Performance of Contaminated Insulators Energized with DC Voltage

    Publication Year: 1981 , Page(s): 518 - 527
    Cited by:  Papers (22)
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    Several types of insulators with a variety of contaminants and test methods were tested using dc voltages. A thyristor controlled dc power source provided a sufficiently stiff source for dc contamination testing. The dc performance is influenced by the contamination degree both for soluble and insoluble materials, contamination uniformity, insulator shape and relationship of total leakage distance to insulator diameter. Generally, the performance with dc shows linearity with respect to string length, but the dc values are generally lower than with ac. View full abstract»

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  • An Approach to the Suppression of Sheath Surge Induced by Switching Surges in a GIS/Power Cable Connection System

    Publication Year: 1981 , Page(s): 528 - 538
    Cited by:  Papers (3)
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    This paper deals with surges induced in the sheath of a SF6 gas insulated switchgear (GIS)/power cable connection system. High frequency switching surges generated from the GIS, in turn, induce sheath surges across insulation sleeves located at GIS/power cable connection points and at cable cross-bonded points. View full abstract»

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  • Corona Characteristics of Simulated Rain

    Publication Year: 1981 , Page(s): 539 - 551
    Cited by:  Papers (6)
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    Influence of rain upon electromagnetic characteristics of corona was studied in an experimental setup consisting of a single corona point located in cylindrical geometry. Distilled water flowing to the corona point through a plastic tube simulated the rain. Wave shape of current pulses, their repetition rate and the frequency spectrum were observed for the ac as well as dc excitations of both p-olarities. Level of applied voltage and the rate of water flow were the parameters varied. View full abstract»

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  • High Voltage Powerline Injury Studies

    Publication Year: 1981 , Page(s): 552 - 558
    Cited by:  Papers (3)
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    Current pathways and reconstructions of human-injury after contact with distribution powerlines are not well understood. The impedance, currents, and modes of tissue destruction are rarely known. Eight anesthetized hogs, weighing 68 to 90 kg, were used in studies with potentials ranging from 2,100 to. 14,400 volts. Electrical contact was made between the hindlimbs, from the hindlimb to forelimb, and over other regions of the body. Currents from 4 to 70 amperes rms and impedances ranging from 130 to 477 ohms were measured. Phase angles up to 4° were observed. View full abstract»

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  • The Shock Record for 500 and 750 kV Transmission Lines in North America

    Publication Year: 1981 , Page(s): 559 - 562
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    A survey of all utilities in the United States and Canada which use transmission of electric power at 500 kilovolts and higher voltages reveals (1) No secondary accidents which resulted from induced shocks and (2) A complaint rate of 0.00038(Km-yr)-1 for 500 kV transmission lines and 0.0024(Km-yr)-1 for 750 kV transmission lines. View full abstract»

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  • Extremely Short Line Fault Tests of a Puffer-Type Gas Circuit Breaker by Direct and Synthetic Test Methods

    Publication Year: 1981 , Page(s): 563 - 571
    Cited by:  Papers (1)
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    A series of short line fault tests for extremely short line length were performed at the maximum available direct power in KEMA laboratory, using 245 kV/40 kA puffer-type gas circuit breaker with single interrupter. Synthetic tests were also performed under the approximately same conditions of the direct tests. View full abstract»

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  • Effects of Faults and Shunt Reactor Parameters on Parallel Resonance

    Publication Year: 1981 , Page(s): 572 - 584
    Cited by:  Papers (5)
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    It is shown that more shunt reactor values may cause resonance on paralleled EHV lines than has been reported previously [1, 2, 3, 4] when faults on the opened circuit are analyzed. This is verified by approximate electrostatic calculations and detailed system calculations for various reactor and transformer configurations. The importance of evaluating reactor zero-sequence currents and secondary-arc currents, as well as the coupled voltages, is illustrated and aTNAsimulation ofparallel resonance is also included. View full abstract»

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  • Harmonics and Switching Transients in the Presence of Geomagnetically-Induced Currents

    Publication Year: 1981 , Page(s): 585 - 593
    Cited by:  Papers (16)
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    Electrons and protons emitted by a solar flare can be caputured by the Earth's magnetic field. The resulting transient in the geomagnetic field can produce quasi-dc currents in electric power systems. These geomagnetically-induced currents (GICs) cause half-cycle saturation in the transformers. GICs in excess of 100 amps have been measured in the transformer neutrals. With the practice of using EHV and UHV lines for transmitting ac power over long distances and because the systems are more solidly grounded, the problems posed by GICs have become more severe. This paper presents the effect of GICs on switching operations on long EHV transmission lines. Single pole switching and secondary arc currents, long line energization, out-of-step switching etc. are considered. The effect of harmonics caused by GICs is evaluated on the harmonic filter ratings of an adjacent HVDC terminal. View full abstract»

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  • Load-Flow Studies in the Presence of Geomagnetically-Induced Currents

    Publication Year: 1981 , Page(s): 594 - 607
    Cited by:  Papers (36)
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    Large transient fluctuations in the earth's magnetic field can produce quasi-dc currents in electric power systems. These geomagnetically-induced currents (GIC's) cause half-cycle saturation in power transformers resulting in increased transformer var requirements. This paper discusses the phenomena by which GIC's are produced in power systems, the system and transformer modeling necessary for representing the effects, and the results of load-flow studies made with GIC present in a large interconnected power system in the northern United States and Canada. Results of the studies are compared with data recorded during a geomagnetic storm. View full abstract»

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  • An Advanced Contingency Selection Algorithm

    Publication Year: 1981 , Page(s): 608 - 617
    Cited by:  Papers (63)
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    This paper reports on the development of an advanced contingency selection algorithm giving superior results compared to earlier techniques. Problems inherent in the earlier algorithm resulted in occasional misranked contingency cases. The new algorithm gives results which are essentially equivalent to a ranking based on the results of a DC load flow of each case, only at a fraction of the calculation time. A complete derivation, test results and applications are given in the paper. View full abstract»

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  • Development for Measurement of Operating Parameters of Synchronous Generator and Control Systems

    Publication Year: 1981 , Page(s): 618 - 628
    Cited by:  Papers (9)
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    On load tests to measure operating parameters of apparatus in typical thermal and hydraulic power stations were performed. The results obtained by static characteristic tests of generator were greatly affected by magnetic saturation. Authors propose a new method to estimate on load synchronous reactances from no load factory tests. For dynamic characteristic test, authors conducted'a new arbitrary-axis load rejection method in addition to d-axis and q-axis load rejection method proposed by F. P. de Mello[1]. View full abstract»

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  • Limit Cycle Analysis of Hydroelectric Systems

    Publication Year: 1981 , Page(s): 629 - 638
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    Describing function analysis is used to predict limit cycles in a single-area hydroelectric power system. Backlash, rate limits, and a detailed hydrogovernor turbine model are considered in the analysis. The results provide evidence of the existence and nature of very low frequency limit cycles. Such theoretical evidence contrasts with early simulation studies and helps clarify anomalies among more recent observations and simulation studies. View full abstract»

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  • AC Flashover Characteristics of Long AIR Gaps And Insulator Strings Under Fog Conditions

    Publication Year: 1981 , Page(s): 639 - 645
    Cited by:  Papers (6)
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    This paper describes the ac flashover test results of long air gaps up to 8 m and insulator strings under fog conditions, obtained in the new UHV fog room (35 x 26 x 35 m(h)) completed in Feb., 1979, at Takeyama Laboratory of Central Research Institute of Electric Power Industry. View full abstract»

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  • Some Effects of Tension on Static Wire Fatigue in New England

    Publication Year: 1981 , Page(s): 646 - 654
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    A review is made of the various factors affecting fatigue stress in overhead static wires. A practical limit of 20% UTS is found for the allowable operating tension to insure against fatigue damage. The calcu-lated bending stresses due to aeolian vibration are shown to increase as the 3/2 power of tension. Comparison of two static wires presently in service in New England indicates that the present practice of setting tension at 12.5% UTS bare @ 0°F provides an adequate margin of safety against fatigue damage, and that increasing initial tension to limit sag under iced conditions would not return benefits commensurate with the increased risk of fatigue damage. View full abstract»

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  • Field Determinations of HVDC Ozone Production Rates

    Publication Year: 1981 , Page(s): 655 - 661
    Cited by:  Papers (1)
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    The environment near a high voltage direct current (HVdc) transmission line experiences corona effects, including the production of oxidants. Field determination of ozone production rates were made at the Bonneville Power Administration (BPA) HVdc Test Facility, The Dalles, Oregon, in fall and winter 1977. A novel micrometeorological profiling technique was used to identify sources of ozone plumes. The results indicate that even during precipitation the atmospheric ozone concentrations from HVdc lines at voltages up to ±550 kV are relatively small. Measured atmospheric ozone concentration plumes are consistent with laboratory data predictions of ozone concentrations based on corona, line parameters, and ambient dispersion. This confirmation under worst-case field conditions demonstrates the validity of previous estimates of a very low magnitude of the potential ozone effects. 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