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IEEE Transactions on Power Apparatus and Systems

Issue 1  Part 1 • Date Jan. 1976

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Displaying Results 1 - 25 of 50
  • [Front cover and table of contents]

    Publication Year: 1976, Page(s): c1
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    Freely Available from IEEE
  • Elecrode vapour effects in high current gas blast switchgear arcs

    Publication Year: 1976, Page(s):1 - 13
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1984 KB)

    In this paper it is suggested that the magnetic pinch effect at the electrode/arc column junction is responsible for local current density enhancement and the consequent copious emission of electrode vapour into the column of an SF6arc. This hypothesis is supported by measurements of electron density and arc temperature in the column vapour core and by the agreement of pinch theory with... View full abstract»

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  • Effect of clearing short circuits and automatic reclosing on torsional stress and life expenditure of turbine-generator shafts

    Publication Year: 1976, Page(s):14 - 25
    Cited by:  Papers (63)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1152 KB)

    Recent concern over abnormal stresses imposed on the shafts of large turbine-generators, due to high speed switching of network faults, has led to intensive investigation of this phenomenon. Elaborate computer programs were developed for simulated model studies which revealed that hitherto unexpectedly high shaft stresses can occur merely by tripping a three-phase short circuit near the power stat... View full abstract»

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  • Determination of frequency decay rates during periods of generation deficiency

    Publication Year: 1976, Page(s):26 - 36
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (960 KB)

    This paper describes a method of determining the maximum probable rates at which power system frequency will decay following a disturbance which results in an overload on the available generation. The analysis is based on the maximum electrical load which a generator-transformer combination will accept as a function of the characteristics of the unit and the system to which it is connected and the... View full abstract»

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  • Overpressure phenomena in distribution transformers with low impedance faults: Experiment and theory

    Publication Year: 1976, Page(s):37 - 48
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1472 KB)

    While the problem of disruptive failure of distribution transformers has received much recent study, uncertainty still remains as to the precise phenomena which cause cover blowing or tank distortion. This paper presents some new insights into the mechanisms of cover blowing based on a comprehensive and highly instrumented test program. Unique contributions from this study should help clarify many... View full abstract»

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  • Induced currents and losses in single-core submarine cables

    Publication Year: 1976, Page(s):49 - 58
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    Impedances are defined for all conductors which constitute a submarine single-core cable: the central conductor, the metallic sheath, the reinforcement if any, the armor and the sea. Impedances of magnetic armor are considered in some detail and relevant numerical data are given. The presence of other cables, far apart in the sea, is taken into consideration. Rules for composition of impedances ar... View full abstract»

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  • Three phase load flow program

    Publication Year: 1976, Page(s):59 - 65
    Cited by:  Papers (55)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    The paper describes a general three phase load flow program developed for the steady state analysis of any electric transmission network under all possible imbalance conditions such as untransposed EHV lines, single phase loading, single pole switching, etc. Input data preparation and output data interpretation are made easy for program users by using both phase and symmetrical components quantiti... View full abstract»

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  • Magnetic noise of induction motors

    Publication Year: 1976, Page(s):66 - 75
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    A digital computer program is described which predicts the acoustic noise generated by the magnetic field in an induction motor. The motor air gap may have static or dynamic eccentricities, and the squirrel cage rotor may be skewed or unskewed. Besides calculating the sound power in decibels at any motor speed, other important performance parameters such as steady and harmonic (cogging) torques, m... View full abstract»

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  • Inclusion of DC converter and transmission equations directly in a Newton power flow

    Publication Year: 1976, Page(s):76 - 88
    Cited by:  Papers (47)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1208 KB)

    This paper presents the method used to include the equations for DC converters and transmission lines directly in a Newton AC system power flow. The DC equations are presented in a per unit form that is compatible with the per unit AC equations. The DC equations can therefore be incorporated directly into the Jacobian of the Newton power flow. The convergence properties of the Newton method are no... View full abstract»

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  • Surge propagation in three-phase pipe-type cables, part I ߞUnsaturated pipe

    Publication Year: 1976, Page(s):89 - 95
    Cited by:  Papers (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    The step response of three-phase pipe-type cable is determined. The solution techniques are closed form and analogous to those developed by Carson for overhead transmission lines. Results are shown for cradled and triangular configurations. The Fast Fourier Transform is used for calculation, dramatically reducing computation time. Delay of the zero sequence wave and attenuation of all components a... View full abstract»

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  • Long-term stability solution of interconnected power systems

    Publication Year: 1976, Page(s):96 - 104
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    This paper describes solution and simulation techniques which result in an efficient and practical approach to long-term stability studies on digital computers. These efficiencies are derived from two algorithms used alternately to simulate large power systems. A technique for algebraization of differential equations, including the simultaneous solution of all network equations, is discussed. The ... View full abstract»

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  • Dynamic measurements of cathodic emission in a moving arc

    Publication Year: 1976, Page(s):105 - 112
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3768 KB)

    A new technique has been developed for the measurement of the fine structure of the cathodic emission in a moving arc. The results obtained give evidence for the initiation and extinction of individual emitting sites and allow the determination of the current they carry. The lifetime of the sites is determined from the exponential-like decay in the number of extinction of emitting sites following ... View full abstract»

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  • Multi step analysis of interconnected grounding electrodes

    Publication Year: 1976, Page(s):113 - 119
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    Exact determination of current distribution along a grounding electrode is, in all practical purpose, only solvable by successive approximations. In this paper various methods which solve accurately the most general problem of interconnected electrodes are presented and discussed. One of these methods called herein the Multi Step Analysis seems to have definitive advantages with respect to accurac... View full abstract»

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  • Transient control levels

    Publication Year: 1976, Page(s):120 - 129
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1368 KB)

    Failure and circuit upset of electronic equipment due to transients is a problem now and is one which has promise of becoming more of a problem in the future as trends continue toward miniaturization and circuit complexity. Protection methods are used more or less extensively and often haphazardly. At present, there does not appear to be a clear approach toward achieving compatibility between the ... View full abstract»

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  • Synthetic polymer papers suitable for use in EHV underground cable insulation

    Publication Year: 1976, Page(s):130 - 139
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1240 KB)

    This relates to the applicability of TenaxRpaper made of poly(2,6-diphenyl-p-phenylene oxide) fibers to EHV cable insulation. Tenax paper shows excellent thermal stability in DDB impregnant even at 150° and its impulse strength has been improved significantly. Long-term dielectric test on model cable suggests that Tenax paper insulation may provide an EHV cable capable of operating... View full abstract»

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  • The effects of SF6- N2mixture upon the recovery voltage capability of a synchronous interrupter

    Publication Year: 1976, Page(s):140 - 144
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    The experimental results showing the relation between rate of rise of recovery voltage (RRRV) and percentage of N2- SF6mixture, by pressure, are reported. A description of the test vehicle and the test procedure is also included. For a constant di/dt the optimum interrupter performance, judged in terms of its voltage recovery capability, is observed to occur when the SF... View full abstract»

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  • The nature of A. C. machine torques

    Publication Year: 1976, Page(s):145 - 154
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    The generation of torque in A.C. machines is not well understood by engineers. National and international standards define only average steady state values and do not cover transient or oscillatory components. The only transient data routinely provided by the manufacturer is short circuit torques. This situation leaves the application engineer in a poor position to properly apply motors or generat... View full abstract»

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  • Dynamic single-unit representation of induction motor groups

    Publication Year: 1976, Page(s):155 - 165
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (864 KB)

    The paper describes a method of representing a group of induction motor loads by a single-unit equivalent. The dynamic performance of the composite group following supply disturbances is examined using the single unit model. The representation employs the induction motor steady state equivalent circuit mad allows for effects of inertia and mechanical load characteristics. Experimental results are ... View full abstract»

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  • 500 KV station-post insulator performance at P G and E's outdoor laboratory at moss landing

    Publication Year: 1976, Page(s):166 - 177
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3344 KB)

    This paper discusses a three-and-one-half-year study of constantly energized 500 kV station-post insulator performance in a coastal environment where ocean salt, moderate industrial contaminant, and coastal fog are encountered. Under test at PG and E's Moss Landing EHV Laboratory are semiconductive, siliconed, and untreated porcelain glazed posts. Semiconductive and full length siliconed posts hav... View full abstract»

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  • Static field anode corona characteristics in sulphur hexafluoride

    Publication Year: 1976, Page(s):178 - 186
    Cited by:  Papers (18)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1080 KB)

    This paper reports the results of an experimental investigation of the static field anode corona characteristics in SF6over a wide range of gas pressures and field non-uniformities. In addition to the experimental study the theoretical streamer onset voltages of the various test gap geometry-pressure configurations were calculated and these are compared with the experimentally determine... View full abstract»

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  • Electromagnetic shielding of a system computer in a 230-kV substation

    Publication Year: 1976, Page(s):187 - 196
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1744 KB)

    The results are reported of a project designed to reduce the magnitude of transient high-frequency electromagnetic field disturbances near 230-kV line disconnect switches by structural shielding. A reduction in peak transient electric fields from 600 volts per meter to an equipment specification value of 1 volt per meter at the site of a large computer installation has been obtained. The transient... View full abstract»

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  • Power circuit breaker transient recovery voltages

    Publication Year: 1976, Page(s):197 - 207
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1000 KB)

    This paper describes the effects of the system zero-sequence network impedances and bus capacitance on circuit breaker transient recovery voltage requirements for EHV systems. Three basic types of faults are considered: three-phase-to-ground terminal faults, three-phase ungrounded terminal faults, and short line faults. Comparisons are presented between conventional methods of calculation used in ... View full abstract»

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  • A fast decoupled static state-estimator for electric power systems

    Publication Year: 1976, Page(s):208 - 215
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    A new algorithm is described to solve the static, time-invariant weighted least-square state-estimation problem for large-scale electric power systems. The solution is obtained through P-θ and Q-V decoupling and alternately iterating the active and reactive equations using fixed, simplified submatrices of the information matrix. Thus, a much faster algorithm is obtained yielding the exact sol... View full abstract»

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  • A bibliography for the study of subsynchronous resonance between rotating machines and power systems

    Publication Year: 1976, Page(s):216 - 218
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    Subsynchronous resonance (SSR) has arisen as a phenomenon that has the potential for damage to turbine-generators. Intensive work has been and continues to be performed to devise methods of analyzing SSR phenomena, and to develop means to prevent SSR when a problem. A bibliography of references applicable to the study of SSR is presented to facilitate further work. View full abstract»

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  • Selective-pole switching of long double-circuit EHV line

    Publication Year: 1976, Page(s):219 - 230
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1064 KB)

    This paper develops the joint use of several new concepts for improving stability, reliability, and safety of a double-circuit three-phase EHV line: 1. Use of selective-pole switching; that is, only the faulted conductors are opened and reclosed. 2. Exclusive use of that arrangement of conductors that gives the least current to ground from a large vehicle capacitively coupled to the line: like pha... 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