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Power Apparatus and Systems, IEEE Transactions on

Issue 5 • Date May 1985

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Displaying Results 1 - 25 of 35
  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Page(s): c1 - 1232-b
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    Freely Available from IEEE
  • IEEE Power Engineering Society

    Page(s): c2
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    Freely Available from IEEE
  • Thermal Performance of Splices and Terminals in Pipe-Type Cable Systems

    Page(s): 977 - 986
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    A 230kV pipe-type cable test circuit was installed in the Miami substation in the Florida Power & Light Company system. From actual test data collected, computer models were developed to allow the determination of the thermal characteristics and the ampacity of the potheads and splices on pipe-type cable systems. Field data collected from operating pipe cables in the Florida Power & Light system have validated the accuracy of these computer models developed from the test circuit parameters according to a set of simple guide lines. View full abstract»

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  • Errata

    Page(s): 986
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  • Qualification of Safety-Related Electrical Equipment in France Methods, Approach and Test Facilities

    Page(s): 987 - 992
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    Requirements for qualification of electrical equipment used in French-built nuclear power plants are stated in a national code, the RCC-E, or Regles de Consiruction et de Conception des Mat6riels Electriques (Chapter B). Under the RCC-E, safety related equipment is assigned to one of three different categories, according to location in the plant and anticipated normal, accident and post-accident behavior. View full abstract»

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  • An Approach to Maintaining Qualification of Calss-1E Equipment in the Mild Environment

    Page(s): 993 - 996
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    In a paper presented at the February 1983 IEEE Winter Power Conference in New York, the authors presented a method of qualifying Class-1E equipment in the so-called "mild environment" (Vol. PAS-102, No. 8) WM017-1. View full abstract»

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  • Power System Damping Enhancement by Two-Axis Supplementary Control of Synchronous Generators

    Page(s): 997 - 1004
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    The addition of a properly controlled q-ais field winding on the rotor of a synchronous generator has been suggested before as an effective way of improving power systemn steady-state and transient stability limits. This paper explores, on the other hand, an additicnal and very important feature of such a winding; that is its capability of enhancing power system damping and hence suppression of mdesirable sustained oscillations experienced in power networks. View full abstract»

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  • Development of Low-Cost Modular Designs for Photovoltaic Array Fields

    Page(s): 1005 - 1011
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    A low-cost modular photovoltaic array field design developed for commercial/industrial installations is discussed. Key features of the design include minimum site preparation requirements, circuit designs which result in low life-cycle maintenance costs, low cost easily installed support structures, and economical approaches to lightning protection, grounding and electromagnetic interference (EM) suppression. View full abstract»

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  • Availability of Solar and Wind Generating Units

    Page(s): 1012 - 1016
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    The accepted definitions of availability used for fuel-fired and nuclear generating units are not wholly appropriate for solar and wind generating units. Certain changes are suggested, and a set of availability definitions better suited to such units is proposed for discussion. These define availability of the energy resource and of weather suitable for operation separately from availability of the equipment. Overall availability is then taken as the product of these two factors. View full abstract»

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  • Analytical Method for Calculating Corona Noise on HVAC Power Line Carrier Communication Channels

    Page(s): 1017 - 1024
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    A method is presented for computing corona noise level on coupling arrangements of HVAC power line carriers. Corona noise is generated by the corona current, which is injected into the bundle conductors by the corona sources randomly distributed along the line. Corona current is computed by adding the excitation function and the propagation factor. The excitation function is eval uated by using a formula already definied for predicting radio noise level. The propagation factor is computed by using a very accurate line simulation-model and a rigorous propagation algorithm, valid also for a non-uniform transmission system of any length or geometrical configuration or terminal impedances. Corrective terms are introduced, which allow evaluation of corona noise in the carrier frequency range, with any given bandwidth, in terms of quasi-peak or rms or average value. View full abstract»

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  • Parallel Multi-Area State Estimation

    Page(s): 1025 - 1034
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    A parallel multi-area approach is presented in this paper for static state estimation of the power system. View full abstract»

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  • Network Observability: Identification of Observable Islands and Measurement Placement

    Page(s): 1035 - 1041
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    Two algorithms are presented; one for (i) testing the observability of a network and (ii) identifying the observable islands when the network is unobservable, and the other for selecting a minimal set of additional measurements to make the network observable. The two algorithms are based on triangular factorization of the gain matrix and are characterized by (i) being extremely simple, (ii) using, subroutines already in a state estimation program, and (iii) incurring very little extra computation. The design and testing of the algorithms are presented in this paper. View full abstract»

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  • Network Observability: Theory

    Page(s): 1042 - 1048
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    A complete theory of network observability is presented. Starting from a fundamental notion of the observability of a network, a number of basic facts relating to network observability, unobservable states, unobservable branches, observable islands, relevancy of measurements, etc. are derived. Simple and efficient algorithms can be developed based on these basic facts to (i) test network observability, (ii) identify observable islands and (iii) place measurements for observability. View full abstract»

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  • Reliability Modeling of Generation Systems Including Unconventional Energy Sources

    Page(s): 1049 - 1056
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    A method for reliability evaluation of electric power systems with unconventional energy sources, such as solar power plants and wind turbine generators, is presented. The fluctuating nature of energy produced by such unconventional units has a different effect on the overall system reliabilitv than conventional units. Methods described in the published literature appear to have several deficiencies. The method presented in this paper combines conventional and unconventional units into separate groups. The analysis proceeds by creating a generation system model for each group. The models of the unconventional groups are modified hourly depending on the limitations of energy. All the models are combined hourly to find the loss of load expectation and the frequency of capacity deficiency for the hour in question. This procedure is accomplished using a discrete state algorithm as well as the method of cumulants. Results obtained in a case study using the proposed method are described. View full abstract»

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  • Second Benchmark Model for Computer Simulation of Subsynchronous Resonance

    Page(s): 1057 - 1066
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    Two turbine-generator models and two system models are presented for the study of subsynchronous resonance. The turbine-generator models have a common torsional mode. The analytic results of three cases are presented where the analysis has been performed by various computer programs. Both self-excitation and torque amplification study results are provided. The machine and system data are presented in such detail that others can apply their analytic techniques and compare results. View full abstract»

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  • Transfer Capability Objectives: A Strategic Approach

    Page(s): 1067 - 1074
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    Transfer capability, the-ability to transmit powor from one area to another, is a measure of the strength of a network. Determining transfer capability objectives is a planning problem with multiple, conflicting objectives and important uncertainties. This paper describes how the "describing function" or SMARTE methodology can be used to determine practical transfer capability objectives. Application to a large, realistic test system is described. Typical applications of the method will be to pool or regional studies. View full abstract»

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  • Security Assessment and Control System : Corrective Strategies

    Page(s): 1075 - 1083
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    A complete methodology for the solution of the real and the reactive subproblems of the general optimization problem that appears as part of the corrective strategies function of power system control centers is presented and analyzed. The method takes advantage of the linear behavior of the incremental relationships between the constraints and the controls. It dynamically selects a set of control variables for every iteration depending on the amount of overload to be corrected in the particular iteration. The algorithm has been used to alleviate several overloads for the IEEE 118 bus system under high and low loading conditions. View full abstract»

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  • Analysis and Prediction of Tranmissiion Unit Performance Using Advanced Regression Models

    Page(s): 1084 - 1094
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    This paper presents the application of advanced regression models for analysis of the outage performance of transmission units (lines). The method is illustrated by an analysis of Commonwealth Edison Company's 345 kV transmission line outage data. Based on such analysis, the future performance of individual and multiple lines can be predicted for use in bulk transmission system reliability evaluation. View full abstract»

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  • Simulator Study of a Vertical Axis Wind Turbine Generator Connected to a Small Hydro Network

    Page(s): 1095 - 1101
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    The paper describes a simulator study of a vertical axis wind turbine generator connected to a small isolated hydro network. The connection to the network is done through a back-to-back dc link, which is used as a static frequency changer. The penetration level of the wind turbine is in the range 13%-33% of the rating of the AC network. The study includes the transient performance of the dc link and the wind turbine drive during electrical braking and for system disturbances such as AC system faults. View full abstract»

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  • Regulating Transformer Model for Use in Load Flow Analysis

    Page(s): 1102 - 1108
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    This paper describes how an impedance, voltage, and phase model for complicated regulating transformers may be obtained for use in load flow analysis. The explained step-by-step procedure is simple and easy to apply to a wide range of regulating transformers. A typical seven windings per phase regulating transformer is used for a case study and the effectiveness of the proposed procedure was examined. This work should be of interest to design and systems analysis engineers who are looking for an accurate representation of tap changing transformers. View full abstract»

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  • A Fault Program with Macros, Monitors, and Direct Compensation in Mutual Groups

    Page(s): 1109 - 1120
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    A modern formulation of the short-circuit problem leads to a concise algorithm for the solution of the most general short- circuit problem conceivable, where simultaneous shunt faults combined with outages, unbalanced lines, loads, and series faults can be solved with the same ease as simple three-phase faults. High computational efficiency is attained through the use of compensation and sparse forward-sparse back solutions. A production implementation is described that uses macros, monitors, and set manipulation ideas for maximum flexibility. Outages, including outages in large mutually coupled groups, are handled efficiently without the need for iteration by recognizing that network changes can be expressed in a simple product form. View full abstract»

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  • A Game-Theoretic Approach for Cost Allocation in Joint Ventures in Electrical Power Generation Systems

    Page(s): 1121 - 1130
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    A game-theoretic approach involving the Aumann- Shapley (AS) prices is used for cost allocation in joint ventures in electrical power generation systems. Three basic cases are considered: the case of "similar" load duration curves (LDC's) for the participating utilities and economies of scale in the capital cost for the jointly-owned unit; the case of "unsimilar" LDC's, same peak hour and no economies of scale; and the case of "unsimilar" LDC's, same peak hour with economies of scale. In the first case, the benefits of cooperation result from economies of scale, in the second from savings in the fuel costs and in the third from both. In all cases, the theoretical development is followed by a detailed numerical example to demonstrate the calculation process of the AS prices and the benefits of cooperation. View full abstract»

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  • Optimal Mix Algorithms with Limited-Energy Plants

    Page(s): 1131 - 1139
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    In this paper we extend the optimal mix algorithm to include any number of existing thermal units and energy-limited plants (LEP) and one new LEP. The problem is formulated as a nonlinear programming problem and solved by first identifying whether the LEP is loaded separately or jointly with the existing-thermal-unit (EMU) and then finding the loading point of the LEP and the existing thermal units by solving a series of auxiliary problems. The algorithm is demonstrated by solving a few numerical examples. View full abstract»

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  • Distributed Intelligence in Load Control: Results of an Experiment Using Demand Limiting Devices for Residential Load Control

    Page(s): 1140 - 1146
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    The experiment described here involves the application of demand-limiting equipment in all-electric homes by the Omaha Public Power District and the Department of Energy. Dual control of the demand limiters allowed the customer to select the desired peak demand level, which was maintained by the local logic of the demand controller; the utility could then reduce the level proportionally by transmission of control signals via telephone. A residential demand rate was employed for participants. The results are of interest to electric distribution systems considering direct load control and distributed logic for load control. View full abstract»

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  • A United Approach to Optimal Real and Reactive Power Dispatch

    Page(s): 1147 - 1153
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    This paper presents a unified method for optimal real and reactive power dispatch for the economic operation of power systems. As in other methods, the problem is decomposed into a P-optimization module and a Q-optimization module, but in this method both modules use the same generation cost objective function. The control variables are generator real power outputs for the real power module; and generator reactive power outputs, shunt capacitors/reactors, and transformer tap settings for the reactive power module. The constraints are the operating limits of the control variables, power line flows, and bus voltages. 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