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Power Apparatus and Systems, IEEE Transactions on

Issue 12 • Date Dec. 1981

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Displaying Results 1 - 25 of 54
  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Publication Year: 1981 , Page(s): c1 - 43-c
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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
  • Effect of Loads, Shunts and System Uncertainties on Short Circuit Relays Settings

    Publication Year: 1981 , Page(s): 4701 - 4709
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    The present paper examines the effect of loads, shunts and uncertainties affecting the parameters of an electric power system, on the apparent impedances perceived by distance relays. View full abstract»

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  • Incorporation and Impact of a Wind Energy Conversion System in Generation Expansion Planning

    Publication Year: 1981 , Page(s): 4710 - 4718
    Cited by:  Papers (4)
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    This paper utilizes WASP, a state-of-the art computer model, to obtain optimal generation expansion plans for an electric utility in order to assess the impact of incorporating a wind energy conversion system into an electric utility generation expansion plan. The IEEE Reliability Test System is used in the evaluations. The optimal plans satisfy given levels of reliability, in terms of loss of load probability and capacity reserve margin, and minimize the present worth of capital and operating costs minus a salvage value at the end of the planning horizon. The analyses were carried out with a 75 MW and a 150 MW wind energy conversion systems as expansion candidates and evaluating their impact on optimal mix of capacity for displacement, fuel savings and capital and operating costs over the 1981-2010 planning period. In this paper the wind turbine generators are modelled as multi- state units whose derated capacity states are caused by wind variability and random mechanical failure. As the results show, the wind energy conversion system has a significant effect on optimal mix of generation and construction timing of conventional units as well as reliability and capital and operating requirements. View full abstract»

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  • Ensuring Accurate Equipmetn Identification in Outage Data Systems

    Publication Year: 1981 , Page(s): 4719 - 4724
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    Traditionally, the equipment precipitating an outage on a power generating, unit has been linked to the specific outage period through a multi-digit element termed a "Cause Code." View full abstract»

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  • The Economic Analysis of Load Management: The Case of Cycling Residential Air Conditioners

    Publication Year: 1981 , Page(s): 4725 - 4732
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    A marginal-cost-based methodology to determine the cost-effectiveness from four perspectives of utility load management programs is described. The results of an experiment to determine the load and energy impacts of Pacific Gas and Electric Company's Residential Air Conditioner Cycling Program are used to illustrate the methodology. The results are interpreted and their limitations discussed. In spite of some important limitations, it is concluded that the methodology provides a systematic way for utilities to assess the economic viability of a variety of load management programs. View full abstract»

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  • American Electric Power System Electric Thermal Storage Program: an Evaluation of the Impact on the Transmission and Distribution Systems

    Publication Year: 1981 , Page(s): 4733 - 4740
    Cited by:  Papers (1)
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    A cost/benefit analysis proved the Residential Electric Thermal Storage concept, coupled with a time-of-day rate, to be a cost effective load management technique for the American Electric Power (AEP) System. This analysis was based on data from a four-year, 71-installation test program. The analysis was conducted separately for the Generation System and the Transmission and Distribution (T&D) systems. This paper presents a methodology for analyzing T&D systems costs and benefits. Generally, T&D System impact is either not considered or is only considered in a conceptual sense. This paper describes the impact with actual system parameters. View full abstract»

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  • American Electric Power System Electric Thermal Storage Program: an Evaluation of Performance within the Home

    Publication Year: 1981 , Page(s): 4741 - 4749
    Cited by:  Papers (1)
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    Proper customer use and application of Electric Thermal Storage (ETS) space and water heating devices on the customer-side-of-the-meter indicates that ETS can be considered as a viable utility load management concept. These conclusions are based on a comprehensive analysis of field test results by American Electric Power (AEP) personnel. AEP's Residential Energy Storage Program monitored the use of such devices in 71 homes in five of their seven state service area. Subjective and objective test results indicate positive benefits for the customer and the utility. View full abstract»

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  • Summary of an IEEE Glossary of Power Systems Data Transmission and Related Channel Terminology

    Publication Year: 1981 , Page(s): 4750 - 4751
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    This document includes definitions of those terms deemed necessary for performing measurements (or necessary for understanding such measurements) on channels used for data communications. Terms are included which are applicable to audio interfaces of wire line, leased lines and multichannel equipments as well as baseband interfaces of multichannel equipment. View full abstract»

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  • Carbonate Fuel Cell Power Plant Systems

    Publication Year: 1981 , Page(s): 4752 - 4759
    Cited by:  Patents (1)
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    Carbonate fuel cells are an attractive means of developing highly efficient power plants capable of achieving low atmospheric emissions. Because carbonate fuel cells can be used with coal derived fuel gases and their operating temperatures allow the use of turbomachinery bottoming cycles, they are well suited for large installations like central utility stations. Presently, system development activity is directed toward evaluating the readiness of gasifier and fuel processor technology, defining candidate cycle configurations, and calculating projected plant efficiencies. View full abstract»

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  • The Electric Utility 4.5 MW Fuel Cell Power Plant - An Urban Demonstration

    Publication Year: 1981 , Page(s): 4760 - 4764
    Cited by:  Papers (1)
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    The fuel cell could offer an attractive power generation option for electric utilities. This paper reviews the electric utilities' efforts to develop this technology including the siting and construction of the 4.5 MW phosphoric-acid fuel cell demonstrator in New York City. The paper concludes that the fuel cell is moving from technology demonstration status toward commercial service in electric utility systems during this decade. View full abstract»

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  • The Transient Modelling of an Ocean Thermal Energy Converter Boiler

    Publication Year: 1981 , Page(s): 4765 - 4773
    Cited by:  Papers (1)
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    Ocean thermal energy conversion (OTEC) is a process in which the thermal gradient in ocean waters is used to evaporate and condense a working fluid and thereby extract useful work. Most studies of OTEC systems have focused on the economics and steady state behavior of this alternative energy conversion method. In this paper, one subsystem of the OTEC process is modelled in full transient, non-linear detail. Non-linearities occur due to the two-phase boiling process and the enthalpy-temperature thermophysics of the working fluid. The distributed nature of the system occurs due to the continuous change of percent gas in the boiler as the working fluid moves from the entrance (all liquid) to exit (all or nearly all gas). A numerical solution technique is proposed based on discretization. The evaporator considered is of the cross-flow type using propane as the working fluid, however the technique is valid for any channel configuration and working fluid provided that vertical flow exists in the working fluid. The model is used for transient studies in a wide range of working states. View full abstract»

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  • Report on Proposed Standard P690 for the Design and Installation of Cable Systems for Class 1E Circuits for Nuclear Power Generating Stations

    Publication Year: 1981 , Page(s): 4774 - 4775
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    This report was prepared for presentation at the Power Engineering Society 1981 Summer Meeting in Portland, Oregon as part of a technical session on the status of standards currently being developed by the Station Design Subcommittee, Power Generation Committee. View full abstract»

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  • Dispatched Control for Normal Conditions on the HV-AC or Compound HV-AC-DC Systems

    Publication Year: 1981 , Page(s): 4776 - 4784
    Cited by:  Papers (3)
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    The Dispatched Control principle is developed to assure on line economic production of power including losses while maintaining system wide frequency and tie line load setpoints as well as the AC and, if present, the DC voltage profiles. New feasible algorithms are introduced for the reactive power and multiterminal DC system controls. Previously published papers [1], [2] have treated the reevaluation of the Dispatched Control of real power generation or AGC. It is advocated here to treat system security not on line but as part of unit commitment combined with on line active emergency control. A new "Transjection Model" for the compound multiterminal HV-AC-DC system is introduced which emphasizes structural properties of such systems and is instrumental in developing a system wide, uniformly structured Dispatched Control. View full abstract»

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  • Methods for RMS Symmetrical Ground Potential Rise Calculations for Protection of Telecommunications Circuits Entering Power Stations

    Publication Year: 1981 , Page(s): 4785 - 4794
    Cited by:  Papers (3)
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    Methods are presented to calculate rms symmetrical Station Ground Potential Rise (not including dc offsets), due to single or double line-to-ground faults. Faults may occur at station HV or LV buses or anywhere along transmission lines. Short and long lines are treated. Limitations of these methods are discussed. Methods were successfully implemented and tested. View full abstract»

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  • Overvoltages After Current Chopping in a Three-Phase Inductive Circuit with Isolated Neutral

    Publication Year: 1981 , Page(s): 4795 - 4801
    Cited by:  Papers (6)
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    A theoretical and experimental study of the overvoltages after current chopping in a three phase inductive circuit with isolated neutral is presented. The circuit under investigation contains a cable connection between circuit breaker and inductive load and is supplied from an infinite bus. At first the recovery voltage after chopping in the first pole to clear is treated. Then attention is paid to the resulting dc-potential on the system after interruption in the other two phases. Owing to the fact that the current in the second and the third pole to interrupt does not necessarily chop simultaneously this dc-level may be high. It is further shown that after complete interruption reignition in one phase can generate sharp voltage peaks superimposed on the recovery voltages in the other phases. High dc-levels and peak voltages make heavy demands particularly on the coils of ungrounded transformers and motors, on connecting cables and substations. Theoretical results are confirmed by experiments. View full abstract»

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  • Calculation of ION Flow Fields of HVDC Transmission Lines By the Finite Element Method

    Publication Year: 1981 , Page(s): 4802 - 4810
    Cited by:  Papers (58)
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    The paper describes a new method for calculating electric field and ion current caused by overhead DC transmission lines without using the commonly used approximation, Deutsch's assumption. Unknown space functions, i.e. potential, positive and negative ion densities, are iteratively calculated from the coupled differential equations by the finite element method (FEM). The program is generally applicable to all monopolar and bipolar cases including grounded wires and wind. Emphasis is placed on numerical stability and reduced human task in the FEM computation. View full abstract»

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  • Transient Response of Coupling Capacitor Voltage Transformers IEEE Committee Report

    Publication Year: 1981 , Page(s): 4811 - 4814
    Cited by:  Papers (3)
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    The results are presented of the effort to standardize the limits of the transient errors in the output of a CCVT, or CVT, permitted during a subsidence of the input voltage. Various proposed methods of describing and measuring these deviations are discussed relative to their use with protective relays. The conclusion is that no standard can be written at this time. View full abstract»

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  • How to Reduce Errors of Distance Fault Locating Algorithms

    Publication Year: 1981 , Page(s): 4815 - 4820
    Cited by:  Papers (1)  |  Patents (1)
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    Distance fault locating digital algorithms are often based on the processing of fundamental components which are contained in the currents and Voltages. If the extraction of these components is done by means of correlating the signals with sine/cosine functions of the fundamental frequency, and the data window is shorter then one period, the presence of a periodic components in the signals gives rise to large errors. The paper suggests, that to reduce the errors the signals ought to be correlated with sine/cosine functions which have periods equal to the data window length. View full abstract»

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  • Potential Dynamic Impacts of Wind Turbines on Utility Systems

    Publication Year: 1981 , Page(s): 4821 - 4829
    Cited by:  Papers (13)
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    This paper presents the results of an initial assessment of potential wind power generation dynamic impacts on utility systems from a global utility perspective performed for the Electric Power Research Institute. Dynamic study of minute-to-minute ramping, frequency excursions, and short-term transient stability was performed using the isolated Hawaiian Electric Company (HECO) system as an illustrative example. Potential minute-to-minute ramping requirements imposed on conventional generation units of two interconnected utilities, Kansas Gas and Electric (KG&E) and Public Service Company of Colorado (PSCo) were investigated, using interconnected utility operating criteria. View full abstract»

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  • Real Time Results with On-Line Network Equivalents for Control Center Applications

    Publication Year: 1981 , Page(s): 4830 - 4837
    Cited by:  Papers (6)
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    Extensive analysis and testing with real time data of the AEP system for various types of equivalencing techniques has been performed. It was found that for real time on-line applications the REI-type equivalents performed better than other equivalencing methods (Ward-type equivalents). It is shown that the equivalent updating procedure used for REI-type equivalents cannot be used for Ward-type equivalents. Ward-type equivalents which performed well for off-line planning applications and for some simulated real time applications did not work as well under realistic on-line conditions. View full abstract»

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  • Inter-Utility Computer Data Exchange

    Publication Year: 1981 , Page(s): 4838 - 4846
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    As an introduction for four (4) short note papers, a summary committee report is given on the formulation of the problem, an approach for solving it, and preliminary conclusions. The short note papers were prepared by contributors with responsibilities and experience in the use and implementation of digital data communication techniques between control center computers. View full abstract»

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  • Solving Generalized Faults on Congested Right-of-Ways By Equivalent Multiports

    Publication Year: 1981 , Page(s): 4847 - 4853
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    A simplified method is presented for obtaining per-phase nodal voltages and currents for transmission lines situated on congested right-of-ways, not only during normal operation-as also during generalized fault occurence. By using equivalent multiport representations, different kinds of fault conditions can be simulated. Besides the usual application in the protection assessment, the obtained results also represent important data for determining. the moduli of induced voltages and currents at objects localized near the lines. View full abstract»

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  • Optimal Rating of A Transformer for a Growing Load Diagram

    Publication Year: 1981 , Page(s): 4854 - 4859
    Cited by:  Papers (1)
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    An optimally rated transformer is defined as one which satisfies all the engineering requirements and also yields a minimum cost over its operating lifetime. This paper develops a cost function which finds the optimal rating of a transformer for a given load diagram. In the case of a load diagram which grows annually, the cost function also forecasts a replacement date when it will become more economical to replace an existing transformer with a larger one in order to obtain a global minimum cost. The results of some case studies are presented and evaluated, and the lifetime cost of an optimally rated transformer is compared with that of a transformer rated according to a loading guide. View full abstract»

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  • Development and Field Application of Metallic Return Protecting Breaker for HVDC Transmission

    Publication Year: 1981 , Page(s): 4860 - 4868
    Cited by:  Papers (9)
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    This paper describes the system requirements, circuit and component selections, development and field tests on a metallic return protecting breaker for an HVDC transmission system. Self oscillation phenomenon, generated in the course of DC current interruption by an air blast circuit breaker, is utilized to force the current to zero. Also discussed is outlook for development of an HVDC main line circuit breaker. 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