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Power Apparatus and Systems, IEEE Transactions on

Issue 7 • Date July 1981

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

    Publication Year: 1981 , Page(s): c1 - 3678-d
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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
  • 230 KV Self-Contained Oil-Filled Cable Line Installed Underneath a Bridge Located in Maracaibo, Venezuela

    Publication Year: 1981 , Page(s): 3153 - 3165
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    This paper discusses the features of the design, test, manufacture and installation of 230 kV self-contained oil-filled (OF) cables and the system installed underneath a bridge crossing the mouth of Lake Maracaibo in Venezuela. View full abstract»

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  • A General-Purpose Multiterminal DC Load-Flow

    Publication Year: 1981 , Page(s): 3166 - 3174
    Cited by:  Papers (12)
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    This paper presents a novel method for solving the load-flow problem of a general multiterminal dc network in an integrated ac-dc system. The method can handle a great variety of converter controls and operating conditions of the dc system. It has also the ability to handle discrete tap-step and tap limits of the converter transformer, to impose overcurrent limit at the terminal and to represent the combined behavior of the converter control and tap changer during steady-state and transient conditions; all within the iterative procedure. This method iterates directly on the dc voltage equations using a digital current reference balancer to update the dc currents. Since the digital current reference balancer has a simple closed form solution, the computation effort per iteration is extremely small. Numerical examples are presented to demonstrate the various features of the method. The convergence characteristic of the method is good. Storage requirement is only a few percent of that required by other techniques which manipulate with the full Jacobian matrix. Test results showed that the method is considerably faster than previous dc load-flow techniques. View full abstract»

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  • Insulation Properties of 250 KV DC XLPE Cables

    Publication Year: 1981 , Page(s): 3175 - 3184
    Cited by:  Papers (6)
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    The difficulty of obtaining the electric power generation sites close to the city forces us to install long transmission lines and to adopt dc transmission. During the execution of the Hokkaido-Honshu dc submarine cable project, 250 kV class XLPE dc cable was developed in parallel with self-contained oil-filled cables. While XLPE dc cable samples were subjected to a modified CIGRE Recommendation type test for a long term, insulation breakdown occurred frequently. View full abstract»

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  • Optimal Control of Reactive Power flow for Improvements in Voltage Profiles and for Real Power Loss Minimization

    Publication Year: 1981 , Page(s): 3185 - 3194
    Cited by:  Papers (69)
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    A mathematical formulation of the optimal reactive power control (optimal VAR control) problem and results from tests of the algorithm are presented in this paper. The model minimizes the real power losses in the system. The constraints include the reactive power limits of the generators, limits on the load bus voltages, and the operating limits of the control variables, i.e., the transformer tap positions, generator terminal voltages and switchable reactive power sources. Real power economic dispatch is accomplished by standard techniques. View full abstract»

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  • Performance of Third Harmonic Ground Fault Protection Schemes for Generator Stator Windings

    Publication Year: 1981 , Page(s): 3195 - 3202
    Cited by:  Papers (11)
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    The paper shows how the normally generated third-harmonic voltage can be used to protect the lower ten to twenty percent of generator stator windings against ground faults. A method of determining the applicability of the scheme to a given machine is described which takes into account the design of the generator and its externally connected apparatus. The effects of finite resistence ground faults are also investigated and other advantages of the scheme, such as protection of the neutral, are also highlighted. View full abstract»

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  • Analysis and Application of the Stability Limits of a Hydro-Generating Unit

    Publication Year: 1981 , Page(s): 3203 - 3212
    Cited by:  Papers (11)
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    The stability boundaries of a hydraulic turbine generating unit are studied as a function of governor proportional, integral, and derivative gains, machine and system speed regulations, turbine loading, interconnection, and system damping. The analysis is then applied to interpret an incident that drastically reduced the unit stability limits, and to simulate an observed unstable frequency oscillation. View full abstract»

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  • Dispatcher Simulator Training at Consolidated Edison

    Publication Year: 1981 , Page(s): 3213 - 3216
    Cited by:  Papers (1)
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    The power system simulator is a key tool at Consolidated Edison for the training of System Operation personnel. It is being integrated as part of the overall training system and is being considered for use as a tool for performance evaluation of operators. View full abstract»

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  • Load Forecasting Bibliography Phase II

    Publication Year: 1981 , Page(s): 3217 - 3220
    Cited by:  Papers (3)
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    Phase I of the load forecasting bibliography dealt with the general philosophy of load forecasting. This report describes Phase II of the load forecasting bibliography. It is focused primarily on engineering economics, issues and parameters. The papers selected are typical and thus are representative of studies dealing with engineering economics in load forecasting. View full abstract»

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  • Stochastic Optimal Energy Dispatch

    Publication Year: 1981 , Page(s): 3221 - 3228
    Cited by:  Papers (21)
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    This paper presents a useful algorithm to incorporate the effects of uncertain system parameters into optimal power dispatch. This method employs the multivariate Gram-Charlier series as means of modeling the probability density function (p.d.f.) which characterizes the uncertain parameters. The proposed method is a direct ettelilob of existing techniques: therefore, minimal additional computation effort is necessary. Potential applications include the calculation of probabilistic parameters (eg., probability, expectation) relating to power dispatch. An example of such a parameter the probability of a bus voltage out of range during optimal dispatch. A practical example is pursued to demonstrate the usefulness of the method. View full abstract»

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  • Procedures for the Exchange of Power Plant and Load Data for Synchronous Stability Studies

    Publication Year: 1981 , Page(s): 3229 - 3245
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    This paper provides a specification for the exchange of power plant and load data in five categories: generator data, excitation system data, power system stabilizer data, speed-governing system data, and composite load data. View full abstract»

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  • Two New Algorithms for On-Line Modelling and Forecasting of the Load Demand of a Multinode Power System

    Publication Year: 1981 , Page(s): 3246 - 3253
    Cited by:  Papers (8)
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    Two on-line algorithms are proposed for modelling and forecasting short-term multiple load demand. First a multivariable time series model is presented with a systematic method for determining its order and estimating its parameters. Another model based on the state variable form is then considered. Two decoupled algorithms, recursive least-squares and adaptive Kalman filtering, are combined in a bootstrap manner to estimate the model parameters and states. The performance of the two methods is compared using data provided by the Ontario Hydro for four loading nodes. View full abstract»

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  • Application of Cable Elements Concept to a Transmission Line with Cross Rope Suspension Structures

    Publication Year: 1981 , Page(s): 3254 - 3262
    Cited by:  Papers (2)
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    A methodology utilizing non-linear elastic catenary elements for the analysis of cable structures is summarized and the computer static analysis results for a proposed 500 KV cross rope suspension structure (CRSS) are presented. The catenary element allows any cable to be modeled as a single element between end points, greatly simplifies data preparation, reduces matrix size and improves accuracy. Uniform loads along the cable, including cable weight, wind, ice, etc., may be included directly as well as point loads at joints. An algorithm for the computation of cable fabrication lengths is included in the program, greatly simplifying the design of large indeterminate cable structures. Analysis results presented include cable length calculation, standard NESC loadingson a single tower, broken component analysis on both a single tower and a five tower, six span 8400 ft. (2560 m) segment of a transmission line with cross rope suspension structures. View full abstract»

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  • Switching Surge Response of Transformer Insulation Designed on the Basis of Power Frequency PD Inception Volt-Time Curves

    Publication Year: 1981 , Page(s): 3263 - 3273
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    The paper presents the results of power-frequency and switching-surge tests performed on transformer insulation models. View full abstract»

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  • Experimental Investigation of the Ampacity of Distribution Cables in a Duct Bank with and without Forced Cooling

    Publication Year: 1981 , Page(s): 3274 - 3283
    Cited by:  Papers (1)
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    A full-size experimental duct bank was constructed for the study of the ampacity of distribution cables in a duct bank. Forced cooling by the circulation of a cooling liquid in two of the ducts showed a possible substantial increase in cable ampacity. Results demonstrate that the maximum conductor temperature for cables undergoing cyclic loading may be determined from the daily average heat generation rate and the loss factor. Results also indicate that the heat generated at the cables flows to the ground surface during the summer as well as the winter periods where it is dissipated to the atmosphere. View full abstract»

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  • IEEE Working Group Report of Problems with Hydrogenerator Thermoset Stator Windings Part I-Analysis of Survey

    Publication Year: 1981 , Page(s): 3284 - 3291
    Cited by:  Papers (12)
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    Various modes of premature failure of hydrogenerator stator insulation systems have been noted and the Working Group survey results are presented. Failure modes are correlated with salient features of the insulation system and of the generator. The results may be used to improve the design and maintenance of stator insulation systems. The paper forms the basis for two companion papers: Part II-Detection, Correction and Prevention; and Part III-Bibliography. View full abstract»

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  • IEEE Working Group Report of Problems with Hydrogenerator Thermoset Stator Windings Part II-Detection, Correction and Prevention

    Publication Year: 1981 , Page(s): 3292 - 3300
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    Insulation systems for large hydrogenerator stators consisting mainly of mica, bonded with a synthetic thermoset resin, have been a significant generic advance over the former asphaltic systems. View full abstract»

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  • IEEE Working Group Report of Problems in Hydrogenerator Thermoset Stator Windings Part III-Bibliography

    Publication Year: 1981 , Page(s): 3301 - 3303
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    This working group was established by the Hydroelectric Power Subcommittee of the Power Generation Committee to investigate problems with hydroelectric generator insulation systems. The investigation included those North American generators using thermosetting resin insulation systems for stator windings. View full abstract»

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  • Idenntification of Parameters for Power System Stability Analysis Using Kalman Filter

    Publication Year: 1981 , Page(s): 3304 - 3311
    Cited by:  Papers (18)  |  Patents (1)
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    We propose that parameters on generators and the control units, used for power stability analysis, should be identified on the field data for reliable analysis in planning and operation of power supply systems. We apply Kalman filter technique in estimating the parameters. The identified data are compared with the design data and are well verified by analyzing the dynamic stability under line switching condition. Which deviation of designed values from identified values has the largest influence on the analysis, is also investigated. View full abstract»

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  • Step and Touch Potentials at Faulted Transmission Towers

    Publication Year: 1981 , Page(s): 3312 - 3321
    Cited by:  Papers (5)
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    The paper contains measurements and analyses of earth potential profiles at American Electric Power (AEP) 765 kV transmission towers and at an Ontario Hydro (OH) 500 kV test tower during staged fault tests. Measurements of the step and touch potentials for various tower grounding schemes are shown. The effectiveness of a special ground potential control (GPC) ring installed as part of the tower grounding to reduce step and touch potentials is demonstrated by measurements and supported by computer studies. The step and touch potentials are examined analytically for various GPC ring design parameters and for several two-layer soils. View full abstract»

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  • A Numerical Procedure for the Calculation of the Temperature Rise and Ampacity of Underground Cables

    Publication Year: 1981 , Page(s): 3322 - 3330
    Cited by:  Papers (7)
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    A numerical procedure employing the finite element technique is developed for the calculation of the heat dissipation from a distribution duct bank. The procedure is used for calculating the conductor temperature and the ampacity of cables with and without forced cooling. The accuracy of the procedure is demonstrated by the comparison of the results with experimental findings. The accuracy, versatility and ease-of-use of the numerical procedure over presently employed analytical procedures show clearly the advantages of the numerical procedure. View full abstract»

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  • Decentralized Power Modulation of Multiterminal HVDC Systems

    Publication Year: 1981 , Page(s): 3331 - 3339
    Cited by:  Papers (8)
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    This paper appLies a new method of control design for decentralized power modulation of multiterminal hvdc systems. The feedback structure uses only local output variables which are directly available without observer action. The feedback gains are computed to assign closed loop eigenvalues of the Linearized system for any specified modes. A computer simulation of an integrated ac/dc power system demonstrates resulting control performance; for typical disturbances. Comparisons are made with centralized modulation and several designs with limited communications. View full abstract»

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  • Damping Shaft Torsional Oscillations Using a Dynamically Controlled Resistor Bank

    Publication Year: 1981 , Page(s): 3340 - 3349
    Cited by:  Papers (11)
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    The technical feasibility of using a dynamically controlled, three phase resistor bank to damp shaft torsional oscillations in large steam turbo-generators is examined. Torsional damping is achieved using a straightforward control strategy based on generator speed. A study system is defined and the shaft torques following various electrical system disturbances are computed and analyzed. It is shown that substantial damping can be achieved with a relatively small resistor bank, thus reducing the risk of significant shaft damage due to electrical disturbances. View full abstract»

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  • Arc Foot Motion, Current Distribution, Arc Short-Circuiting and Arc Clogging in an Air-Blast Interrupter

    Publication Year: 1981 , Page(s): 3350 - 3355
    Cited by:  Papers (2)
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    Tests are conducted in a commercial air-blast interrupter. The arc foot motion on the nozzle surface and the arc behavior are studied after contact separation for currents up to 25 kA rms. Arc short-circuiting between the arc column and the nozzle surface, and the distribution of the current in the arc foot during normal motion of the arc in the nozzle and during arc clogging are measured using special probes embedded in the nozzle. 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