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Power Apparatus and Systems, IEEE Transactions on

Issue 4 • Date July 1972

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  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Publication Year: 1972 , Page(s): c1 - 1742-b
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    Freely Available from IEEE
  • IEEE Power Engineering Society

    Publication Year: 1972 , Page(s): c2
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    Freely Available from IEEE
  • Membership Application for the IEEE Power Engineering Society

    Publication Year: 1972 , Page(s): i - ii
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    Freely Available from IEEE
  • Effect of Conducting Particles on AC Corona and Breakdown in Compressed SF6

    Publication Year: 1972 , Page(s): 1329 - 1338
    Cited by:  Papers (30)
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    This paper describes studies of the effects of conducting particles on breakdown phenomena in compressed SF6 under alternating voltage conditions. Results with free particles of different shapes and materials are compared with those obtained with fixed particles for both parallel-plane and coaxial electrode geometrics. Calculations of the particle motion and of the energy in microdischarges between particle and electrodes are used to suggest mechanisms by which breakdown is initiated. It is shown that the breakdown voltage, which can be as low as 10% of the uncontaminated value, is markedly dependent on particle shape, size and material, and that the nature of the motion in alternating fields is important in establishing conditions for free- particle-triggered breakdown. View full abstract»

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  • Transient Oil Pressure Rise at EHV Pipe-Type Cable Faults

    Publication Year: 1972 , Page(s): 1339 - 1345
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    Since various phenomena resulting from earth faults in pipe-type cables have not yet been sufficiently clarified, the authors made fault tests on pipes of 105 and 254 mm in diameter and 20 to 60 m in length. As a result, arc voltages were found to be nearly constant, independent of the magnitude of fault current. Moreover, the mechanism of transient pressure rise and the relation between arc energy and oil pressure rise were elucidated. Calculated results agreed fairly well with experimental data. View full abstract»

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  • Transient Oil Pressure Rise in Accessories at EHV Pipe-Type Cable Faults

    Publication Year: 1972 , Page(s): 1346 - 1353
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    In the previous paper [1], the mechanism of transient pressure rise at the faults in oil-filled pipe-type cables was discussed in detail, and the relations between arc power and pressure rise were analyzed. This paper deals with the transient pressure rise in accessories such as semi-stop joints, normal joints, and trefoil boxes. View full abstract»

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  • Sulfide Attack and Treeing of Polyethylene Insulated Cables - Cause and Prevention

    Publication Year: 1972 , Page(s): 1354 - 1360
    Cited by:  Papers (4)
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    A new type of deterioration involving sulfide attack was discovered in a thermoplastic polyethylene insulated control cable installed in a chemical plant. View full abstract»

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  • Investigations of Water Effects on Degradation of Crosslinked Polyethylene Insulated Conductors

    Publication Year: 1972 , Page(s): 1361 - 1370
    Cited by:  Papers (32)
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    As a result of these investigations it was observed that under certain conditions the degradation of crosslinked polyethylene (XLP) cable due to moisture was accelerated by a continuously applied ac stress as compared to dc or the absence of voltage. Further, the course of the involved activity was believed to take place in three stages. The first was the appearance of tree like channels which were filled with water, second their subsequent growth, and third their ultimate bridge between the inner and outer cable electrodes. Conventional insulation resistance measurements failed to reveal or explain these stages. View full abstract»

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  • Transient Stability Problem Solution Using The Hang Predictor-Corrector Method

    Publication Year: 1972 , Page(s): 1371 - 1378
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    A predictor-corrector algorithm is developed for the solution of the differential equations of transient stability studies. The algorithm uses the Hamming predictor-corrector method with some alterations, introduced to make it more suitable for the power system transient stability equations. An elementary power system, consisting of one synchronous machine, represented by 9 differential equations, connected to an infinite bus-bar by a double circuit transmission line, is used to test the proposed algorithm. View full abstract»

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  • Application of Instrumentation for the Evaluation of Power System Dynamic Performance

    Publication Year: 1972 , Page(s): 1379 - 1381
    Cited by:  Papers (5)
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    The dynamic performance of electric power systems during disturbances is a function of many factors. The effect of these factors vary with the nature and configuration of the electrical system and is complicated due to the interrelated, and sometimes compounding effect of the automatic control equipment which makes up a system. The post-event evaluation of a dynamic system condition requires automatic and instantaneous recording of many system quantities which will show initial conditions, the transient period, the dynamic period, and the steady state or final result of all contributing factors. The instrumentation required to monitor the influence of various system quantities must provide precise records even though separated by great distances and must continue to perform accurately regardless of wide variations in voltage, current or frequency. View full abstract»

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  • Piecewise Solution of the Load-Flow Problem

    Publication Year: 1972 , Page(s): 1382 - 1386
    Cited by:  Papers (5)
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    This paper presents the impedance and admittance forms of diakoptic solution of the load-flow problem on the basis of graph- theoretic concepts. The formulation does not assume a fixed slack bus voltage but instead takes into account the equation for total transmission line losses as an integral part of the scheme. Finally, test data based on this alternative formulation are presented for purposes of comparison With existing methods. View full abstract»

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  • Piecewise Solution of Large Electrical Systems BY Nodal Admittance Matrix

    Publication Year: 1972 , Page(s): 1386 - 1396
    Cited by:  Papers (4)
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    This paper presents a new method for piecewise solution of large and integrated electrical networks and power system load flow problems applying principle of superposition, without involving diakoptics. This permits an average engineer to solve his large scale practical problems in pieces without having knowledge of terminology, topology and diakoptics. The method does not require development of intersubdivision matrix (model) as required in diakoptical method on the contrary calculates cut branch currents in a simple way. Necessary mathematical models are developed which represent the performance characteristics of the system. Subdivision solution models are developed in the form of nodal admittance matrix and solved in conjunction with optimally ordered triangular factorization to yield nodal voltages. The method provides full freedom in choosing the line of cut and reference node. View full abstract»

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  • Sparse Solutions Using Hash Storage

    Publication Year: 1972 , Page(s): 1396 - 1404
    Cited by:  Papers (1)
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    An efficient computer program which permits rapid calculations for solving a large sparse system of linear equations, which arise in most power system network problems, is described here. This procedure will have an application to any system having a similar admittance matrix to the power system, such as a weather prediction or transportation system. The basic powerful tool¿direct hash technique¿ is used to store the nonzero elements of the sparse matrix. The two main features, triangular factorization of the given sparse matrix and use of this factored form to find the direct solution to the system, are used to estimate a post-transient steady state of a power system. Updating the node admittance matrix after a change in the system structure is also performed in factored matrix form. In both factoring the Jacobian and in changing the the system structure, the introduction of additional non-zero terms in a sparse matrix is easily handled without prior knoledge of the new locations. View full abstract»

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  • Optimal Real and Reactive Power Operation in a Hydrothermal System

    Publication Year: 1972 , Page(s): 1405 - 1411
    Cited by:  Papers (11)
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    The non-linear programming problem of short term optimal operation in a mixed hydro-thermal power system is considered in this paper in terms of real, reactive and real and reactive power optimization. The concepts developed for each of these three cases are illustrated by application to a reduced model of the Saskatchewan Power Corporation System. The results clearly show the benefits associated with real and reactive power optimization in a system of this type. View full abstract»

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  • Effects of Hydro-Dynamics on Optimum Scheduling of Thermo-Hydro Power Systems

    Publication Year: 1972 , Page(s): 1412 - 1419
    Cited by:  Papers (3)
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    Decomposition algorithms are proposed in the literature to compute the optimal schedule of integrated hydro-thermal power systems. Such an algorithm in conjunction with successive solutions of optimal load flows and of the hydro subsystem is presented in [1]. However, the specific computation of a schedule for a hydro system, which takes into account hydro dynamics with variable water heads, cascaded plants, by-pass discharges, spilling, pump storage plants, and navigation requirements, is still to be presented. The present paper covers a possible procedure to compute the optimal schedule for such hydro systems. View full abstract»

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  • Special Report on Development and Installation of 138 kV Cable Systems for Tests EEI Waltz Mill Station

    Publication Year: 1972 , Page(s): 1420 - 1426
    Cited by:  Papers (1)
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    A group of papersl presented at the 1970 Winter Power Meeting outlined the EEI-Manufacturer's 500/550 KV Cable Research Project, at the Waltz Mill Testing Facility, under the direction of the Electric Research Council. A description of the station layout and voltage supply was given in the lead paper2 of that series and need not be repeated here. View full abstract»

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  • Development and Installation of 138 kV Cable System for Tests at EEI Waltz Mill Station: Cable 21

    Publication Year: 1972 , Page(s): 1427 - 1433
    Cited by:  Papers (5)
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    This paper describes the initial phase of an Industry development program, comprising one manufacturer's Laboratory development work to provide a 138 kV crosslinked polyethylene cable system, carried out in accordance with an acceptance test program recommended by the Electric Research Council representing the electric utilities in the U. S. View full abstract»

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  • Development and Installation of 138 kV Cable for Tests at EEI Waltz Mill Station: Cable 22

    Publication Year: 1972 , Page(s): 1434 - 1442
    Cited by:  Papers (3)
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    This paper covers General Cable Corporation's research, development and qualification testing of a 138 kV cable having extruded cross-linked polyethylene insulation. Also discussed is the manufacture, factory testing and installation of a length of this cable at the Edison Electric Institute test site at Waltz Mill, Pennsylvania. The accelerated life tests being performed at Waltz Mill will serve to evaluate and establish the performance of 138 kV cross-linked polyethylene insulated power cable designed and manufactured in accord with current technology. View full abstract»

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  • Development and Installation of 138 KV Cable Systems for Tests at EEI Waltz Mill Station: Cable 23

    Publication Year: 1972 , Page(s): 1443 - 1447
    Cited by:  Papers (3)
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    This paper covers the General Electric Company's development, testing and installation at the Waltz Mill Station of a 138 kV solid dielectric power cable and associated splice. The cable described is unique in the industry in that (1) it utilizes a new insulation with higher breakdown strength, (2) is the only cable at Waltz Mill to use a mineral filled cross- linked polyethylene, and (3) has its insulation shield intimately bonded to the insulation. View full abstract»

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  • Development and Installation of 138-kV Cable for Tests at EEI Waltz Mill Station: Cable 24

    Publication Year: 1972 , Page(s): 1448 - 1456
    Cited by:  Papers (5)
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    The Electric Research Council published rigid specifications for cable supplierswho wished to participate in the Waltz Mill program for Solid Dielectric Cables. This paper deals with problems encountered during the conduct of the qualification tests, and the solutions to these problems. Designs of the 138 kV cable and splice are discussed along with test data which show these basic electrical and thermal characteristics. The paper includes sections dealing with terminators and connectors. Finally, the author reviews the installation at the test site and compares preliminary test data obtained there with the test data observed in the laboratory. View full abstract»

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  • Design & Development of 138 KV Solid Dielectric Cable for Tests at Waltz Mill Station

    Publication Year: 1972 , Page(s): 1457 - 1463
    Cited by:  Papers (3)
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    This paper presents a thorough laboratory evaluation of cable design, construction and accessories for 138 kV operation. The work was done as part of the EEI sponsored Waltz Mill project for solid dielectrics. With the increasing use of these cables at higher voltages, it was necessary that complete cable circuits be properly evaluated to determine performance. The testing program disclosed several major problems which, when identified, led to improvement in both material and technique. Of special significance was the development of a system which controlled and recorded conductor temperature. View full abstract»

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  • Development and Installation of 138 kV Cable for Tests at EEI Waltz Mill Station: Cable 26

    Publication Year: 1972 , Page(s): 1464 - 1475
    Cited by:  Papers (4)
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    The development of a flexible, ethylene-propylene base insulated cable by The Okonite Company for 138 kV underground systems is reported up to the actual test installation at Waltz Mill. This paper describes the design development and prototype work, the successful qualification testing of the ultimate cable construction, and the development and qualification testing of a simplified vulcanized splice. View full abstract»

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  • AC Commutatorliess and Brushless Motor

    Publication Year: 1972 , Page(s): 1476 - 1484
    Cited by:  Papers (10)
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    We have developed a type of ac commutatorless motor which is a combination of a motor and thyristor controller. The rotor of the motor has neither a commutator, slip rings nor brushes. The motor can therefore be designed rugged for a high speed control. The motor may be most suitable for use in such an environment as with acid or alkaline gas and at locations where maintenance-free motors are most urgently required. View full abstract»

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  • A Brushless DC Motor With Armature Induced Voltage Commutation

    Publication Year: 1972 , Page(s): 1485 - 1492
    Cited by:  Papers (5)
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    The brushless dc motor described in this article is composed of six thyristors and of a single synchronous motor with an auxiliary position sensor. On the field poles of this motor compensating windings are provided. These windings are connected in series with dc supply as is the case with a dc motor. However, in the motor described in this article the commutation is performed by the armature induced voltage, therefore commutating devices such as capacitors, reactors and auxiliary thyristors are not required. View full abstract»

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  • A Modern Approach To Induction Machine Parameter Identification

    Publication Year: 1972 , Page(s): 1493 - 1500
    Cited by:  Papers (10)
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    This paper describes the application of a modem data acquisition system to the measurement of induction machine characteristics and the use of digital techniques for the identification of circuit parameters from this data. Direct analytical methods of data reduction are compared with parameter optimizing techniques. 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