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Power Apparatus and Systems, IEEE Transactions on

Issue 7 • Date July 1965

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Displaying Results 1 - 10 of 10
  • The Apple Grove 750-kV Project- Equipment Design and Instrumentation

    Page(s): 541 - 550
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    The Apple Grove 750-kV project, jointly sponsored by American Electric Power Service Corporation and Westinghouse Electric Corporation, with six other participating companies, was designed to provide data on corona loss and radio influence performance of conductors at a nominal voltage of 750 kV and to determine the technical and economic feasibility of transmitting power at this extra-high-voltage. The project also incorporates facilities for studying conductor configuration, insulator assemblies, spacers, connectors, splices, hardware, and steel structures. Operating experience has been gained on a 750-kV transformer, lightning arresters, coupling capacitors, and line traps, as well as on a typical 500-kV line design. This paper describes equipment design, instrumentation, and special project features, such as the determination of conductor performance on a statistical basis by the use of simultaneous comparison under the same environmental conditions. View full abstract»

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  • The Apple Grove 750-kV Project- 500-kV Switching Surge and Line Flashover Tests

    Page(s): 550 - 560
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    Rational design of extra-high-voltage systems depends on analytic studies to predict switching surge overvoltage magnitude and probability, and on laboratory tests for tower system switching surge withstand capability. Laboratory tests have been confined to ideal waveforms applied to single window configurations. Correlation with flashover performance of a typical 3-phase installation exposed to actual switching surge waveforms is attempted. The influence of interphase coupling and multiple circuit breaker operations in promoting multiphase flashover, which may curtail system performance margins, is also studied. View full abstract»

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  • The Apple Grove 750-kV Project- 515-kV Radio Influence and Corona Loss Investigations

    Page(s): 561 - 573
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    This paper describes extensive radio influence and corona loss measurements made for the Apple Grove 500-kV test line which utilized 2-conductor bundles of 1.602-inch (Chukar) subconductors. The Apple Grove extra-high-voltage test project is a joint research project sponsored by the American Electric Power Service Corporation and Westinghouse Electric Corporation with six other participating companies. The data are analyzed for use with automatically recorded statistical data to predict the performance of a long transmission line of the same conductor configuration operating under a similar environment. A measurement technique is described and used to determine the relative radio influence field strength from each of the phases. View full abstract»

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  • The Apple Grove 750-kV Project-775-kV Radio Influence and Corona Loss Investigations

    Page(s): 573 - 579
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    This paper gives the results to date of radio influence and corona loss tests performed at a voltage of 775 kV at the extra-high-voltage test project at Apple Grove, W. Va., a joint research project sponsored by the American Electric Power Service Corporation and Westinghouse Electric Corporation with six other participating companies. Effects of line radio-influence terminations and larger centerphase conductors are discussed. Radio influence and corona loss results are given for there test lines utilizing 4-conductor bundles with subconductor diameters of 1.0, 1.196, and 1.382 inches. View full abstract»

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  • Proposed Transient Recovery Voltage Ratings for Power Circuit Breakers

    Page(s): 580 - 608
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    Representative unmodified transient recovery voltages (TRVs) of power systems have been selected to derive the recovery voltage ratings for power circuit breakers. Mathematical expressions have been derived that combine fundamental system parameters such as load current, line impedancee, voltage regulation, and transformer reactance, together with the rated voltage and circuit interrupting capabilities of the breaker, to describe the TRV withstand requirements for power circuit breakers. Two points in a volt-time plane are developed to describe the TRV withstand requirements of power breakers, and numerical values are listed for these proposed rating values. The TRV ratings for fault currents less than rated currents and for kilometric short line faults are also developed. Since the expressions developed describe system recovery voltages, they may also be used to calculate the TRV of actual power systems. View full abstract»

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  • Digital Measurement of Active and Reactive Power

    Page(s): 609 - 621
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    Accurate measurement of active and reactive power is becoming increasingly important as problems of process-energy balance become more complicated and cost savings receive more critical attention. In large electrical systems, very special attention must be given to these measurements to maintain losses at a minimum. In the modern panoramic control unit with its attendant off-limit alarms, digital display of these power values is highly desirable. However, because of the nonlinearity of one of the three variables (the product of which defines the power value), direct digital measurements present difficulties. Conventional solid-state digital voltmeter equipment allows the construction of voltage and resistance parameters in a straightforward manner. The third parameter, the sine or cosine of the electrical angle, is a nonlinear function and, therefore, requires more elaborate measuring equipment. View full abstract»

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  • Basic Concepts of Intersystem Contracts

    Page(s): 622 - 625
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    As system interconnections have become more numerous, interconnection contracts have reflected the need to take more factors into account. To be successful, contracts must provide benefits for all parties; they must be definite enough to prevent misunderstandings and flexible enough to be applicable to changing system conditions. These objectives may often be obtained by statements of principles and policies and by the use of formulas in lieu of specific rates and service requirements. View full abstract»

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  • Load Diversity-Its Role in Power System Utilization

    Page(s): 626 - 635
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    Utilization of load diversity between power systems can result primarily in 1) a savings in capacity requirements as a result of reduced generating-capacity needs, and 2) a reduction in daily operating costs as a result of economy energy transactions between load areas and lowered spinning-reserve requirements (startup and shutdown costs). However, the arithmetic difference between simultaneous and nonsimultaneous load data is not proof that this total diversity can be used to reduce the cost of service. This paper examines the many factors which must be taken into consideration when evaluating the use of both annual and daily diversity. View full abstract»

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  • Power System Reliability II-Applications and a Computer Program

    Page(s): 636 - 643
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    This paper describes the application of reliability calculation techniques presented in a companion paper [1] to actual power system networks. A digital computer program to facilitate reliability calculations is described, and a comparison of calculated and observed reliability on an actual system is presented. View full abstract»

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  • Authors

    Page(s): 644 - 646
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    Freely Available from IEEE

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