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Power Apparatus and Systems, IEEE Transactions on

Issue 10 • Date Oct. 1983

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Displaying Results 1 - 25 of 31
  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Page(s): c1 - 3488-b
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    Freely Available from IEEE
  • IEEE Power Engineering Society

    Page(s): c2
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    Freely Available from IEEE
  • Experience with Large Hydro-Generators at Grand Coulee

    Page(s): 3265 - 3270
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    The design and construction of the three 826 MV-A hydro- generators for The Grand Coulee Third Power Plant represents a significant achievement. A number of factors conspired to create a situation wherein local contact occurred between the stator and rotor of one unit. This paper outlines the events leading up to this incident, describes investigative work and remedial measures taken to re-establish the intended design parameters. View full abstract»

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  • Optimal Design and Control Scheme for Continuous Capacitive Compensation of Distribution Feeders

    Page(s): 3271 - 3278
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    Distribution automation schemes being considered for implementation by electric utilities will rely heavily on substation-based computers for control of reactive power on primary feeders. To assist such implementation a new, continuously controllable, capacitive compensation scheme for primary distribution feeders is presented. This compensation scheme allows optimal placement and sizing of time- variable capacitors based on an optimal operating strategy which provides for power loss minimization as a function of time. A numerical example involving a realistic physically-existing feeder is provided to exemplify the design and control schemes. View full abstract»

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  • Distribution Line Protection Practices Industry Survey Analysis

    Page(s): 3279 - 3287
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    The Effectiveness of Distribution Protection Working Group of the IEEE Power System Relaying Committee analyzed the protection, control, and operating practices of 124 distribution systems through a series of three questionnaires. A data base was established which gives some indication as to how well modern distribution protection systems are performing, as well as providing a bench mark for determining future design and operational trends. View full abstract»

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  • Estimated Power Quality for Line Commutated Photovoltaic Residential System

    Page(s): 3288 - 3295
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    A residential photovoltaic system using a line commutated inverter is modeled using a single diode model for the solar cells and a four switch model for the inverter. The model predicts power factor and total harmonic distortion as a function of solar radiation, array voltage, inverter output voltage, and inverter filter capacitor and inductor size. The model was run using parameter values appropriate for the John F. Long PV System and the predicted results compared well with measured results from the system. The model shows that improvements in total harmonic distortion are made at the expense of the power factor. The harmonic distortion is least when the inverter is operating at just continuous conduction. The. total harmonic distortion can be kept to less than 0.17 all day if a variable inductor is used in the inverter's input filter. View full abstract»

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  • Optimal Capacitor Placement on Three-Phase Primary Feeders: Load and Feeder Unbalance Effects

    Page(s): 3296 - 3305
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    Generalized procedures are presented for optimizing the net dollar savings resulting from reduction of power losses through shunt capacitor placement on three-phase, four-wire, multigrounded primary distribution feeders. These procedures are based on a voltage-dependent model which is developed from results of a three-phase a, b, c phase-frame of reference load flow. Power-invariant transformations are introduced to decouple the actual three separate phases and thereby yield three equivalent single phases with common definition of feeder length. The effects of ground-wire and earth-return paths for balanced and unbalanced system and load conditions are accommodated within the models presented. View full abstract»

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  • Optimum Linear Synchronous Motor Design for High Speed Ground Transportation

    Page(s): 3306 - 3314
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    This paper describes fundamental concepts pertinent to designing an optimum Linear Synchronous Motor as the propulsion system for High Speed Ground Transportation. The complicated interactions between the key parameters are systematically arranged to show what is essential to determine these parameters. View full abstract»

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  • Analysis and Control of Transient Overvoltages on UHV Transmission Systems

    Page(s): 3315 - 3328
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    The results of a comprehensive study of transient overvoltages on a UHV transmission network are presented. In the study, the expected magnitudes of switching overvoltages due to the energization and reclosing, operations were evaluated for a conceptual 1500-kV system. Fault initiation and fault clearing overvoltages were also studied. The sensitivity of transient overvoltages to network configuration and to key system parameters was examined. The effectiveness of various means of overvoltage control was evaluated. It is demonstrated that the overvoltages can be reduced to a practical level depending on the type and complexity of the control technique utilized. View full abstract»

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  • Recent Experience with Synthetic Circuits for Capacitive Current Switching Tests on HV Circuit-Breakers

    Page(s): 3329 - 3337
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    The phenomena related to capacitive current switching are briefly summarized and the resulting requirements for such tests carried out by synthetic methods are discussed. View full abstract»

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  • Measurements of Electric and Magnetic Fields in and Around Homes Near a 500 KV Transmission Line

    Page(s): 3338 - 3347
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    In response to the public's concern about living near a 500 kV transmission line, Public Service Electric & Gas Company of New Jersey conducted measurements to determine the magnitudes of electric and magnetic fields in and around homes adjacent to the line. Results of the measurements indicated that house walls provided shielding from the electric field and that the electric fields created by house wiring were a significant part of the total field inside the homes. View full abstract»

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  • Evaluation of the Cost of Losses for Underground Transmission Cable Systems

    Page(s): 3348 - 3357
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    This paper discusses issues related to the evaluation of cost of losses for underground power transmission cable systems. The first section of this paper reviews the need for cable system cost of losses evaluation. Cable characteristics, utility system issues, and economic factors relevant to the evaluation of losses are then presented and aspects which might have a significant effect on loss evaluation are highlighted. Currently used evaluation methods are briefly reviewed and the "present worth of annual revenue requirements" evaluation method is presented in more detail. Final discussion considers how much detail is required in a cost of losses evaluation and how the cost of losses information can be used. View full abstract»

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  • Identification of a Best Algorihthm for Digital Distance Protection of Transmission Lines

    Page(s): 3358 - 3369
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    The paper describes amethod for seeking out the best or optimal combination of digital distance relay and digital filter algorithm for transmission line protection. It is found that this best combination consists of a 3rd order recursive low pass filter algorithm and distance relay algorithm based on the solution of the differential equation representing the transmission line model. Typical relay transient operating characteristics on R-X co-ordinates are presented. View full abstract»

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  • Determination of Transient Apparent Impedances of Faulted Transmission Lines

    Page(s): 3370 - 3378
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    The paper describes a method of determining transient apparent impedances of faulted transmission lines, as would be seen by a digital distance relay. Typical relay operating results are presented. The method described in this paper may be applied to any existing digital distance relay and digital filter algorithms, and therefore enables one to seek out what may be considered the best of optimal relay and filter algorithms. View full abstract»

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  • Experience in Design Optimization of Induction Motor Using 'SUMT' Algorithm

    Page(s): 3379 - 3384
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    Design optimization of an induction motor is considered as a nonlinear multivariable constrained programming problem. A set of nine basic variables is identified and suitable constraints are imposed to meet the thermal, starting and other performance requirements of the machine. Six different objective functions are considered to facilitate the selection of suitable optimized designs for any given application. The optimization is achieved through Rosenbrock's method of direct search in conjunction with the sequential unconstrained minimization technique (SUMT). For a typical 3.7kw cage motor, the optimized design results with different objective functions are presented. View full abstract»

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  • Interruption Cost Methodology and Results - A canadian Residential Survey

    Page(s): 3385 - 3392
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    This paper presents the results of an investigation of the direct, short term impacts and costs incurred by residential electrical consumers resulting from local random supply interruptions. The study used a mail survey to determine the residential user's assessment of the cost of electric service interruptions. The survey obtained user's cost valuation using three approaches. Two of these approaches asked respondents to indicate rate changes that would be commensurate with specified changes in reliability, while the third approach was an indirect worth evaluation based on the preparatory actions a consumer predicted he would take, given a specified (un) reliability. User's valuations are reported for a number of frequency and duration failure scenarios. Variations of user cost estimates are discussed as functions of several user characteristics. Comparisons with the results of other researchers are presented. View full abstract»

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  • Operational Inductances of Turbine Generators; Test Data Versus Finite-Element Calculations

    Page(s): 3393 - 3404
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    As part of EPRI Program RP 1288-1, Improvement in Accuracy of Prediction of Electrical Machine Constants, a method has been developed for calculating small-signal operational inductances. The method utilizes solutions to the magnetic diffusion equation, solved by the finite-element method. To faithfully simulate the behavior of the rotor iron for small-signal perturbations, measured values for incremental permeability are used. View full abstract»

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  • Internally Oil-Cooled Oil-Filled Cable (Separated Type)

    Page(s): 3405 - 3414
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    The internally oil-colled cable was studied for the main long-distance large power underground cable. The cooling oil of the cable is separated from the insulation oil. An unique and very compact feeding joint was developed, at which the cooling oil was extracted from or fed to the high voltage cable. The electrical and mechanical initial tests of the cable and accessories were successfuly carried out making a loop 40m long for 275 kV class. View full abstract»

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  • Critical Survey of Hierarchical Methods for State Estimation of Electric Power Systems

    Page(s): 3415 - 3424
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    This paper intends to give a unified survey of methods appropriate for solving the state estimation problem in large-scale electric power systems. After a first overview of the various approaches proposed up to now, the most suitable among them are described, examined and compared. The comparisons are carried out on the basis of selected criteria evolving estimation properties of the resulting algorithms, along with their organization possibilities and their capabilities of handling some important satellite functions. View full abstract»

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  • Fast Algorithms for Small Area Electric Load Forecasting

    Page(s): 3425 - 3432
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    Advanced techniquesc for forecasting future distribution system loads require computations that normally consume large amounts of computer time. Two of the more common steps in modern forecasting methods are shown to be solvable using signal processing techniques, resulting in computer processing that is much faster. Details of implementation are given, along with comparison tests of the new approach versus traditional techniques. View full abstract»

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  • The Use of Multiple Factoring in the Parallel Solution of Algebraic Equations

    Page(s): 3433 - 3438
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    A major computation that must be done in many power system problems in both planning and operations is the solution of large sets of algebraic equations, Investigations into the use of parallel processors in the transient stability problem have shown that the forward and back substitution through the L and U factors of the Y matrix are the parts of the solution that are the least efficient in the parallel mode. If parallel processing is to be successfully applied to power system problems, better ways of solving algebraic equations in parallel must be developed. View full abstract»

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  • Development of Training Simulator for Power System Operators

    Page(s): 3439 - 3445
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    The power system has been expanded and got complicated with growing up electric power demand, which requires a high technical level personnel skilled in power sytem operations. As the power system has become highly reliable with the application of advanced technologies, it has been rather difficult for an operator to have a training chance of dealing with emergency cases on an actual power system. Therefore, it became of vital necessity to develop a training simulator for power system operators, which is described in this paper along with simulator training courses. View full abstract»

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  • Energy Control System an Advanced Approach for Transalta Utilities

    Page(s): 3446 - 3452
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    TransAlta Utilities, the largest investor owned electric utility in Canada, is implementing an advanced Energy Control System to be located in Calgary, Alberta. This Energy Control System (ECS) consists of four large-scale processors configured as a Main Applications Computer (MAC) and a Security Applications Computer (SAC) with the remaining two processors in a dual redundant mode with the MAC and SAC. The system includes MMI equipment and advanced SCADA interfacing hardware which supports the Sequence of Events (SOE) function. View full abstract»

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  • Monte Carlo Simulation of Power System Stability

    Page(s): 3453 - 3459
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    This paper presents a Monte Carlo simulation of the transient stability of a power system. The simulation time is in the order of years in which the occurrence of disturbances and the subsequent protective action are considered to be stochastic processes. The objective is to obtain a probabilistic measure of transient stability for a power system instead of just its particular response to an individual disturbance. The latter is the usual output of deterministic transient stability programs that are used for present day worst case analysis. A probabilistic analysis is needed if such worst case design criteria is to be replaced by (probabilistic) reliability criteria. This paper describes a computer program that has been developed for such a Monte Carlo simulation and presents some results of its application to representative systems. View full abstract»

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  • Application of Static Var Compensators in Longitudinal Power Systems

    Page(s): 3460 - 3466
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    The application of a Static Var Compensator (SVC) in a longitudinal power system is presented and the technical studies performed to evaluate its effect on system operation are described. Steady state analysis is based on the combination of SVC and system characteristics. Using this approach changes in loading conditions and SVC adjustable parameters can be easily analysed. Results of simulations are presented that show the effect of SVC reactive power support on the system transient performance. Cases with supplementary controls to protect the system against SVC loss are also included. 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