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Power Apparatus and Systems, IEEE Transactions on

Issue 3 • Date May 1973

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Displaying Results 1 - 25 of 39
  • IEEE Transactions on Power Apparatus and Systems - Table of contents

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

    Page(s): c2
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    Freely Available from IEEE
  • Membership Application for the IEEE Power Engineering Society

    Page(s): 849 - 850
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    Freely Available from IEEE
  • Abstracts of Conference Papers

    Page(s): 851 - 863
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    Freely Available from IEEE
  • Calculation of Turn-On Stresses In a Hvdc Valve Having Parallel Thyristor Strings

    Page(s): 864 - 870
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    A computer model is used to demonstrate the turnon stresses of thyristors connected in series and for paralleled thyristor strings within a HVdc valve. The performance of parallel strings is compared with single strings of directly paralleled thyristors. The use of inductors in the strings is considered, and the possible benefits of controlling relative gating instants of the thyristors are analysed. View full abstract»

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  • Particle-Initiated Breakdown Between Coaxial Electrodes in Compressed SF6

    Page(s): 871 - 876
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    The influence of conducting particles on the ac breakdown of compressed SF6 has been investigated for two coaxial systems having inner electrodes of diameter 75 mm and 150 mm and a 250 mm diameter outer electrode, using voltages up to 450 kV rms at pressures up to 1.8 MNm¿2 (18 atm.). For filamentary particles of 0.1 mm or 0.4 mm diameter wire, there was a maximum breakdown voltage at 0.4 MNm¿2 (4 atm.) which became more pronounced with increasing particle length and decreasing particle diameter. No maximum was observed with spherical particles but for each system there was a critical sphere size which gave the lowest breakdown voltage at a given pressure. There was also a slight density effect at the lower pressures, aluminum spheres producing lower breakdown voltages than spheres of brass or steel. Tests with wires and spheres fixed to the inner conductor, to simulate breakdown initiated by field enhancement at particles migrating to the inner, gave ac and impulse results which differed from the free-particle ac breakdown voltages. Calculations have been made of the motion of spherical particles and of the energy in microdischarges at the electrodes; the particles can make excursions lasting several cycles and this may be important in creating optimum conditions for breakdown. View full abstract»

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  • Bivariate Probablity of Breakdown Under Switching Surges

    Page(s): 877 - 885
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    A new approach of characterizing the breakdown properties of insulation under switching surges is presented. The probabilistic aspects of the actual disruptive voltage and the time to breakdown are combined in one analytical function, the breakdown bivariate probability density distribution. The paper uses this novel concept to offer some useful suggestions to the design of insulation. View full abstract»

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  • Analysis of a Pole-To-Pole Short-Circuit On Bipolar Hvdc Converters

    Page(s): 886 - 892
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    A pole-to-pole short-circuit of a HVdc converter with two bridges in cascade is analyzed. The effect of a common source reactance and blocking of valves are also considered. The computed current waveforms indicate approximately the same levels of peak current as obtlined previously for short-circuits of a single bridge. The interaction of the commutating reactances is found to be marginally significant. View full abstract»

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  • The Calculation of Transient Voltage Distribution in a High Voltage DC Thyristor Valve

    Page(s): 893 - 899
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    A method of calculating impulse and switching surge overvoltages in a high voltage dc thyristor valve as well as a computer program to perform the calculation, is presented. The effects of valve parameters and stray capacitances on the overvoltages are shown through results of calculations for a representative thyristor valve. The results are supported by measurements performed on a 150 kV thyristor valve. View full abstract»

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  • A New Shunt Reactor Principle Proved: Designed Data and Factory Test Results for Units Built on The Insulated Core Principle

    Page(s): 900 - 906
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    Effective control of electrostatic as well as electromagnetic field distribution within EHV transformer-type equipments significantly enhances their on-line performance. This paper describes the first application of the insulated core principle for management of fields of a 765 kv shunt reactor installed on the AEP System. Design techniques and ta are presented and the modular concept of reactor construction in an oil-filled device is described. Results of feasibility studies of reactors for future UHV systems are included. View full abstract»

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  • Control of Overvoltages on Energizing Capacitor Banks

    Page(s): 907 - 915
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    Transient voltage phenomena occurring during the energization of shunt capacitor banks, due to prestrike and temporary interruption in the switching device of inrush currents have been considered. An analysis is made of a generalized capacitance circuit and energization transient voltage pattems are shown for a range of circuit permutations. An application guide is discussed for reduction of overvoltages during capacitor bank energization by proper choice of circuit elements. The influence of circuit resistance on the bus voltage patterns is reviewed. View full abstract»

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  • An Indirect Techinique Utilizing The Lattice Approach and Superposition for Computing Switching Surges

    Page(s): 916 - 925
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    A new technique has been developed for analyzing switching transients on distributed power systems that is based on the principle of superposition. The main advantage of the new technique is in economy of computer execution time. A linear system must be assumed but frequency dependent parameters which result in multi-velocity waves can be included. The program that is based on the new technique utilizes step responses, that can be computed using existing programs or analog devices, to compute the desired transient responses. Because of the economy of the technique it is well suited for use in determining either the maximum transient voltage or the statistical distribution of peak transient voltages. The technique has been verified on both single-and three-phase test systems. View full abstract»

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  • Dynamic Models of Turbine Generators Derived From Solid Rotor Equivalent Circuits

    Page(s): 926 - 933
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    A method is described for determining the structure and coefficients of dynamic models of turbogenerators from detailed equivalent circuits of the d-and q-axes of a solid rotor generator. These models are intended for analyses of power system dynamics in cases where it is desirable to have a very accurate representation of the synchronous machine. The models have been used to study power system hunting or dynamic stability, first swing or transient stability, load rejection overvoltages, resynchronization of cross-compound turbine-generator sets, field current and voltage during out-of-step operation, voltage dip and other phenomena associated with machine operation on power systems. The paper reviews some of the experience obtained in system studies and in comparisons between test results and computer simulations. View full abstract»

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  • Bonneville Power Administration Transformer Short Circuit Test Results - Comparison of Winding Inspection With Diagnostic Methods

    Page(s): 934 - 942
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    This paper summarizes Bonneville Power Administration's transformer short circuit test experience of three-phase units rated 115-kv Delta to 12.47-kv Wye; reviews BPA's diagnostic and low voltage impulse test results, and correlates them with factory inspection of damaged units. Special emphasis is on the low voltage impulse method of evaluating transformer damage. View full abstract»

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  • Performance of Insulators for Direct Current Transmisson Line Under Polluted Condition

    Page(s): 943 - 949
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    This paper describes the results of investigation into the performance of suspension type insulators for HVDC transmission line under polluted condition. Shed profile plays a big role in determining DC withstand voltage value. The withstand voltage value for DC is lower than that for AC rms, and the higher the deposit density is, the smaller becomes the atio of the DC value to the AC. View full abstract»

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  • Real and Reactive Power Optimization by Suboptimum Techniques

    Page(s): 950 - 956
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    The short-term real and reactive power optimization of a large system is a non-linear programming problem and its solution requires a considerable amount of computational effort. In actual practice separate real and reactive power suboptimization techniques may be more suitable than a complete optimization(1). The results obtained by the suboptimal techniques under ideal conditions coincide with those from a real and reactive power optimization. In this paper, complete real and reactive optimization has been solved by suboptimization techniques. The proposed approach decomposes the complete problem into two halves, i. e. the optimum voltage evaluation and the real power optimization with optimally determined voltages. A theoretical treatment of the technique along with a qualitative and analytical discussion is provided. The method is applied to a small system and the results obtained are compared with a real and reactive power optimization. View full abstract»

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  • Response Characteristics of Boiling Water Reactor Generating Units

    Page(s): 957 - 960
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    The IEEE Working Group on Power Plant Response to Load Changes has encouraged papers on various aspects of plant response. This paper is intended to contribute to the understanding of the response characteristics of a major class of power generation equipment, namely Boiling Water Reactor (BWR) plants as furnished by General Electric Company. View full abstract»

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  • Effect of Nozzle Parameters on SF6 ARC Interruption

    Page(s): 961 - 970
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    Experimental measurements of dielectric recovery following 400 ??sec duration square current pulses of 350 A and 1000 A have been conducted on ten nozzle configurations with upstream and downstream pressures of 4 atm. and 1 atm. respectively. The data have been analyzed to determine the dependence of recovery, or current interruption capability, upon nozzle geometrical parameters. The analysis indicates that recovery is insensitive to nozzle divergence angle (??) between 9??and 15??, but a cylindrical nozzle severely reduces arc interruption ability. Whereas recovery time tR decreases as the ratio of outlet area Ac to throat area At increases for low recovery voltages VR, a nozzle with a ratio of AC/ At equal to 2 minimizes tR at high VR because the nozzle expansion matches the expansion of the arc. The optimum value of upstream arc length u is about one half of the effective nozzle throat diameter. An increase in u causes a significant increase in ultimate dielectric strength, but if is greater than optimum, there is a tendency towards upstream energy accumulation, delaying recovery. Arc channel recovery is most rapid if the downstream arc length is either very short, thus limiting arc power input, or very long, thus reducing the voltage stress per unit length on the column when VR is applied. View full abstract»

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  • Practical Application of Weather Sensitive Load Forecasting to System Planning

    Page(s): 971 - 977
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    The practical application of weather sensitive load forecasting techniques to system planning are described in detail. Significant features include the use of historical data and the ability to combine several distinct load-weather areas into a single load forecast. This technique has been applied to the Middle South System and the principle results are discussed. View full abstract»

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  • ERC-Manufacturers 500/550-KV Cable Research Project, Preliminary Test Results from Waltz Mill

    Page(s): 978 - 998
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    This paper is designed to accomplish two basic objectives. First, the basic data collected to date during the testing of 550-kV pipe-type cable samples at the Waltz Mill Underground Transmission Test Facility is presented in its completeness. Second, sufficient discussion is included concerning the testing procedures, measuring techniques, and problems encountered during testing to permit the reader to fully understand and grasp and significance of the data presented. A lengthy and detailed analysis of the data is not included. Comments of the participating manufacturers will put sample performance into perspective. View full abstract»

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  • Traveling Waves on Multi-Conductor Open-Wire Lines-A Numerical Yurvey of the Effects of Frequency Dependence of Modal Composition

    Page(s): 999 - 1008
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    The propagation of voltage and current on transmission lines consisting of n conductors and ground is characterized by n modes, each composed of a particular combination of voltage and current waves, traveling at a common velocity and exponentially attenuated with distance. In general the modal composition is frequency dependent. Steady-state calculations for traveling waves on four typical ac EHV lines, at from 25 to 200 miles from the source, indicate that a real, frequency-independent modal-to-phase transformation matrix (rather than an operational one) might be used for the approximate calculation of step-function response. The elements of this matrix were defined as the real parts of the exact (complex) matrix corresponding to some "effective, mid-range" frequency-5 KHz proved appropriate in the cases examined. View full abstract»

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  • A Method of Calculating the RI from HVDC Converter Stations

    Page(s): 1009 - 1018
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    Radio Interference ( RI), generated due to the periodic switching of the valves, is an important factor in the design of HVDC converter stations. A method is developed in this paper for calculating the RI level of any given converter station layout. The method consists basically of determining the equivalent circuit for the valve turn-on transients, analyzing the currents as a function of frequency in all elements of the circuit, and finally calculating the RI around the station using the currents obtained above together with data on the physical layout of the station. View full abstract»

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  • CIGRE/IEEE Survey on Extra High Voltage Transmission Line Radio Noise

    Page(s): 1019 - 1028
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    A worldwide survey on transmission line radio noise was conducted by a joint CIGRE and IEEE task force with contributions from a large number of American n and overseas utility companies. The results from this survey--line geometries, conductor surface gradients, ts, and radio noise values in different weather conditions, as well as lateral radio noise profiles and noise frequency spectra--are presented. This collection ion of directly comparable radio noise field data from 75 lines with voltages ranging from 220 to 765 kV is expected to provide a practical reference for future line design and a valuable check for radio noise e-prediction methods. View full abstract»

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  • Comparison of Radio Noise Prediction Methods With CIGRE/IEEE Survey Results

    Page(s): 1029 - 1042
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    A collection of directly comparable radio noise field data from 75 high-and extra-high-voltage lines was presented in earlier papers by a joint CIGRE and IEEE task force. In the present paper a summary of different methods for calculating radio noise levels from transmission lines is presented and a comparison of measured and calculated values is given. View full abstract»

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  • Gaseous Effluents Due to EHV ransmission Line Corona

    Page(s): 1043 - 1049
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    The generation of gaseous effluents as a result of corona activity on EHV transmission lines has been raised as an environmental issue. This paper discusses analytical, laboratory and field measurement work performed by and for the American Electric Power Service Corporation that clearly shows that no environmental problem exists. A companion paper discusses the field measurement program in greater detail. 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