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Power Apparatus and Systems, IEEE Transactions on

Issue 5 • Date Sept. 1978

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Displaying Results 1 - 25 of 62
  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Publication Year: 1978 , Page(s): c1 - 1977e
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    Freely Available from IEEE
  • IEEE Power Engineering Society

    Publication Year: 1978 , Page(s): c2
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    Freely Available from IEEE
  • Inclusion of Inter-Area Transmission in Production Costing Simulation

    Publication Year: 1978 , Page(s): 1481 - 1488
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2414 KB)  

    Traditionally, production costing simulation programs have ignored inter-area transmission restrictions which may, in actual daily system operation, cause suboptimal system wide generating unit dispatch. With the advent of large scale pooling and operating agreements and concomitant pool wide economic dispatch, a need has arisen for system planners to be able to recognize transmission limitations in production costing studies. This paper presents a technique which allows such limitations to be considered. In addition, the paper outlines how this tool can be used to aid system planners in determining adequate inter-area transfer capacity and give relative system-wide transmission requirements for alternate generating unit siting strategies. View full abstract»

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  • The Navajo SMF Type Subsynchronous Resonance Relay

    Publication Year: 1978 , Page(s): 1489 - 1495
    Cited by:  Papers (9)  |  Patents (1)
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    A Subsynchronous Resonance (SSR) Protective relay first applied at the Navajo Plant, in conjunction with other primary SSR protective means, is described. View full abstract»

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  • Update on Power Generation in Canada to 2000 A. D.

    Publication Year: 1978 , Page(s): 1496 - 1500
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    The original Paper appears in IEEE Transactions on Power Apparatus and Systems, January/ February 1977, Volume PAS-96, Number 2, pages 38 to 43. It covered the forecasting work done from June to December 1973, as part of the strategic planning process for Canadian General Electric's Power Generation Business. The forecast covered the period 1973 to 2000 and included all hydraulic turbines and generators, fossil and nuclear turbine-generators, and gas turbine-generators, that were expected to be installed in Canada, by year, in this time frame. View full abstract»

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  • Safety Considerations of Joints in Towers Utilizing Corrosion-Resistant Alloy Steels

    Publication Year: 1978 , Page(s): 1501 - 1508
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    There has been some concern on the part of the Power Authority of the State of New York regarding certain possible safety aspects which may result from continuous currents induced in transmission line towers, if these currents encounter sufficient joint resistances between tower members to pose shock possibilities to a person making contact across the joints. The concern arose in connection with Alloy A-588 steel towers. Chas. T. Main, Inc. conducted a test program on one of the Power Authority's operating 345 kV lines of such construction. The test results demonstrated that on this line no shock hazard arises from induced-current voltage drops across A-588 joint resistances. View full abstract»

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  • The Occurrence and Control of Interference from Oil Mist in the Detection of Overheating in a Generator

    Publication Year: 1978 , Page(s): 1509 - 1514
    Cited by:  Papers (5)
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    An infrequent but vexing problem is the occurrence of oil mist that produces a false overheating signal on an ion chamber detector monitoring a generator for the presence of pyrolysates. Though the presence of oil mist may not affect the operation of the generator, its interference with the detection of local overheating is undesirable. View full abstract»

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  • Practical Approaches to Supplementary Stabilizing from Accelerating Power

    Publication Year: 1978 , Page(s): 1515 - 1522
    Cited by:  Papers (26)
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    Use of accelerating power to provide damping of synchronous machine oscillations through supplementary control of excitation has significant advantages. However, true accelerating power derived from Mechanical and Electrical power presents difficult measurement problems. A practical approach of deriving stabilizing action comparable to that obtainable with accelerating power is described using measurement of electrical power and frequency of a voltage synthesized from machine terminal voltage and current. View full abstract»

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  • Computational Implementation of On-Line Loadflow

    Publication Year: 1978 , Page(s): 1523 - 1537
    Cited by:  Papers (2)
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    This paper describes a straightforward building method of initializing internal and external network system bus voltage and power injection operating levels for subsequent steady-state system security evaluation of planned and unplanned network contingency outages. Outages are of the line, tie-line, generator, or load loss type. The program can handle the opening of bus tie or jumper connections and the isolation of a bus or string of buses from the main part of the network. The routine's main advantage is the automatic redistribution and makeup of tie-line P (MW) and Q (Mvar) flows from the external network. This algorithm has been implemented on the Iowa Illinois Gas and Electric Company (IIG&E) real-time control system; it is now under test and evaluation, and preliminary results are most favorable. View full abstract»

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  • Detection of Partial Discharges in Transformers Using Acoustic Emission Techniques

    Publication Year: 1978 , Page(s): 1538 - 1549
    Cited by:  Papers (31)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2583 KB)  

    Partial discharges in transformers cause high frequency (ultrasonic) pressure pulses to propagate through the insulating media. These are similar in character to stress waves propagated in solids during crack formation (acoustic emission). The techniques involved in the detection of acoustic emission (AE) are shown to be well suited to the detection of emissions from partial discharges. View full abstract»

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  • An On-Line Topological Equivalent of a Power System

    Publication Year: 1978 , Page(s): 1550 - 1563
    Cited by:  Papers (24)
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    This paper describes a new steady-state equivalent of a power system for use in real-time operation. The equivalent is the result of applying Dimo's REI method for the reduction of the electrical network and also for the provision of a means for on-line calibration. Although this new equivalent is intended for application in system operation, it would also be useful in planning studies. View full abstract»

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  • Static and Dynamic Var Compensation in System Planning

    Publication Year: 1978 , Page(s): 1564 - 1578
    Cited by:  Papers (34)
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    This paper presents a comprehensive method for planning reactive compensation in power systems so as to maintain voltages in acceptable ranges during contingencies. The methodology allows the addition of further VAR compensation as may be economically justified. Reactive compensation considered consists of conventional shunt reactive compensation, synchronous condensers, as well as variable shunt reactive control devices called static VAR control devices. This work combines VAR optimization with static as well as with dynamic system performance evaluations. Necessary modelling of static VAR control devices for inclusion in dynamic performance programs is also given. View full abstract»

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  • Heat Transfer Characteristics of Gas Spacer Cables

    Publication Year: 1978 , Page(s): 1579 - 1585
    Cited by:  Papers (13)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1566 KB)  

    Heat transfer characteristics of the Gas Spacer Cable (GSPC) was investigated using a model cable. This paper presents the formulae which can be used to calculate the heat transfer of both a 3-core type GSPC and a 1-core type. This paper also describes the effect of gas pressure and gas mixture on the heat transfer characteristics. View full abstract»

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  • A Fast Load Flow Method Retaining Nonlinearity

    Publication Year: 1978 , Page(s): 1586 - 1599
    Cited by:  Papers (46)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3362 KB)  

    One of the most recognized load flow methods at present is the N-R(Newton-Raphson) method [1] with the sparsity techniques and suboptimal ordering [2]. This paper presents a new AC load flow method which is several to more than ten times faster than the N-R method and has the same memory requirement, mathematical complexity and accuracy as the N-R method. As an example, the convergence time for 118 bus system was only one eighth of the N-R method. View full abstract»

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  • System Planning for Bay of Fundy Tidal Power Developments

    Publication Year: 1978 , Page(s): 1600 - 1606
    Cited by:  Papers (3)
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    This paper focuses attention on the markets that could be served by potential tidal projects in the Bay of Fundy, describes the system considerations and computer models used to analyze the technical and economic viability of such developments and outlines the transmission requirements necessary for their integration into the power system networks. It also details the results of a study on the incorporation of a 3360 MW single basin tidal development into the interconnected Maritimes and New England markets. View full abstract»

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  • A Correlation Method for Transmission Line Protection

    Publication Year: 1978 , Page(s): 1607 - 1617
    Cited by:  Papers (10)
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    A method of transmission line protection based on a distributed parameter model of the line is outlined. It is shown that the fault distance appears as a time delay between two quantities associated with the travelling waves at the measurement site. The time delay can be extracted from the fundamental voltage and current waveforms in the presence of superimposed line transients by means of a correlation technique. The proposed method has been tested by numerical simulations and by means of a real-time analog-type computer on a model transmission line and the results were found to be satisfactory. The feasability of a digital computer implementation is briefly discussed. View full abstract»

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  • Economic Shift in Electric Power Generation with Line Flow Constraints

    Publication Year: 1978 , Page(s): 1618 - 1626
    Cited by:  Papers (10)
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    This paper presents a method of finding the optimum shift in generation to eliminate overloading of lines and transformers or to maintain fixed flows on tie lines. It incorporates the concept of generalized inverse matrices, and the sensitivity matrix of power systems. View full abstract»

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  • Asynchronous Operation of A. C. Synchronous Machines The Linear Equivalent Circuit

    Publication Year: 1978 , Page(s): 1627 - 1636
    Cited by:  Papers (1)
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    An equivalent circuit is derived for analyzing the behavior of a linear synchronous machine operating asynchronously. It permits the calculation of all torques and all voltage and current harmonics for any slip with respect to a given stator fundamental frequency input. Relationships to previously reported equations or to supporting analyses are given. View full abstract»

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  • Concepts on Field Excitation Control of Subsynchronous Resonance in Synchronous Machines

    Publication Year: 1978 , Page(s): 1637 - 1645
    Cited by:  Papers (7)
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    Saito, Mukae and Murotani [1] have showni, theoretically and experimentally, that the negatively damped subsynclironous resonance (SSR) in capacitor compensated transmission lines can be suppressed by feedback field excitation control of the synchronous machine. This paper presents concepts which explain that thie positive dampping is achieved by ensuring that the motoring process ldominates the induction generdtion process at the SSR frequency. Irequency criterion, phase shift guideline and controllable sectors are derived for design purposes. The concepts are supported by numerical results confirming the existence. of the predicted controllable sector and by diagrams from eigenvector analysis. View full abstract»

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  • state-Space Modeling oif a Series Compensated Long Distance Transmission System Through Graph-Theoretic Approach

    Publication Year: 1978 , Page(s): 1646 - 1655
    Cited by:  Papers (1)
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    The paper demonstrates a powerful application of graph-theoretic approach in developing a linearized state-model for a typical hydro- power system effectively and systematically. The linearized d-q state models of basic components of power system such as generator, transformer, transmission line are formulated (conceptually, in isolation) in a synchronousiy rotating frame which permits ease of inter- connection without involving any intermediary of axis transformations. The formulation of model in general, is applicable to multi- machine system and is easily amenable to digital simulation. It is hoped that the system state-model formulation through graph-the- oretic approach would strongly appeal to power system engineers engaged in large-scale comprehensive dynamical system studies. View full abstract»

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  • A General Method for the Evaluation of Possible Systems for Electric Generation with Solar Energy

    Publication Year: 1978 , Page(s): 1656 - 1664
    Cited by:  Papers (2)
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    The purpose of this paper is the development of an easily applied general method of analysis of any type of potential system for electric generation with solar energy. It assumes that data for the site of the potential solar-electric plant collected over a period of ten or more years are available. The most important such data for this analysis are the mean annual insolation per unit area, I, in Btu per square foot (Btu/ft2), and the peak rate of solar insolation, P, in Btu/ft2 hr. Secondary site data include the mean number of hours of sunshine on the site per year, measures of the seasonal variation between summer and winter, and the frequency of damaging storms. For the proposed solar-electric generating plant, only two characteristics are required: the gross heat rate, H, in Btu of solar radiation received on the collectors per kilowatt hour (kWhr) of electricity delivered in usable form, and the amount and efficiency of energy storage included in the plant. The heat rate for the system depends on a series of efficiencies or losses as the received solar radiation passes through successive stages of the system to its electrical output. For fully engineered systems it can be estimated within fairly narrow limits. For k speculative systems which might materialize as a result of future research and development, an assumed value can be chosen on the basis of what is hoped to be achieved. View full abstract»

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  • Impact of Voltage Reduction on Energy and Demand

    Publication Year: 1978 , Page(s): 1665 - 1671
    Cited by:  Papers (30)
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    This paper reports the results of an experimental investigation concerning the impact of voltage reduction on the energy use and demand level as it relates to load composition, specifically that of the American Electric Power System. View full abstract»

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  • Application of Partially Conducting Polymeric Materials for High Voltage Outdoor Insulator in Polluted Environments

    Publication Year: 1978 , Page(s): 1672 - 1679
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    Partially conducting polymers are investigated for high voltage outdoor insulation as a possible solution to the pollution flashover p-roblems. The polymers studied include polyurethane, Silicone rubber and epoxies. Silicon carbide was added to achieve electrical conduction. Composite materials have been developed which show promise for the proposed application. Results of the investigation are discussed. View full abstract»

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  • Surge Propagation Characteristics of Pipe Enclosed Underground Cables

    Publication Year: 1978 , Page(s): 1680 - 1688
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2680 KB)  

    The complex propagation constant and the impedances of a pipe-enclosed cable are studied at the high frequencies common to transmission line surges. The case of eccentric cable positions within the pipe is solved by the use of conformal transformation. The results are closed form expressions which do not necessitate the evaluation of infinite series as common heretofore. As a consequence more efficient computer programs for transmission line transients can be written. View full abstract»

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  • Motor Statring Protection by Impedance Sensing

    Publication Year: 1978 , Page(s): 1689 - 1695
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2137 KB)  

    A linestart induction motor, when protected against locked rotor by a time overcurrent relay, can be tripped off during a normal start under some conditions of load inertia and voltage. Such failure to start can occur even when the relay appears to be correctly set. To prevent it the relay should be disabled at a time after rotation begins and before the relay can operate. A speed sensing switch can supervise in this way but requires direct access to rotating parts, sometimes not feasible or not economical. Impedance sensing offers an accurately setable alternate means by direct relay monitoring of voltage, current and phase angle without requiring access to rotating parts. 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