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IEEE Transactions on Energy Conversion

Issue 2 • June 1989

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Displaying Results 1 - 20 of 20
  • Microprocessor control of double output induction generation. I. Inverter firing circuit

    Publication Year: 1989, Page(s):172 - 176
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (338 KB)

    The design and implementation of a firing scheme using the INTEL 8086 microprocessor to control the inverter firing angle of the variable-speed constant-frequency double-output induction generator (VSCF-DOIG) are described. The microprocessor is used to control the phase shift of the DC-linked inverter of the VSCF-DOIG. It computes the voltage signals from a reference voltage potentiometer and the... View full abstract»

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  • Simulation studies of islanded behavior of grid-connected photovoltaic systems

    Publication Year: 1989, Page(s):177 - 183
    Cited by:  Papers (29)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    Simplified computer models are presented for predicting the run-on time of self-commutated inverters operating in a utility interactive mode. The inverter receives DC power from a photovoltaic (PV) array and delivers AC power to a local load or the utility lines. The models represent the dynamics of a phase-locked loop control circuit that is designed to destabilize the inverter operation and shut... View full abstract»

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  • Design features of the Bad Creek pumped storage project generators motors

    Publication Year: 1989, Page(s):191 - 196
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (439 KB)

    The four pumped-storage generator/motors for the Bad Creek project in Oconee County, SC, are distributed. Consideration is given to the general unit construction, the cooling system, the thrust bearing, and the structural design. The most unique design aspect of these units is the arrangement of the forced fan ventilation system, which uses twenty motor-driven fans to direct air in very controlled... View full abstract»

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  • Elastomer shelf life: aged junk or jewels?

    Publication Year: 1989, Page(s):197 - 203
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (478 KB)

    The shelf life of elastomeric products used in the nuclear industry is typically based on military standards (MIL-HDBK-695C or MIL-STD-1523A). Recently, data became available on naturally aged O-rings that were over 30 years old. An evaluation of this data is presented to demonstrate the conservatism of current guidelines. The test data indicate that typically hardness increases, tensile strength ... View full abstract»

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  • Extending qualified life of Class 1E equipment

    Publication Year: 1989, Page(s):211 - 215
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (286 KB)

    The regulatory basis, essential ingredients, and program strategies are discussed for extending the qualified life of both harsh- and mild-environment Class 1E equipment used in nuclear power plants. A nuclear power plant houses many hundreds of Class 1E components with qualified parts having 5 (or less) to 40 years of qualified life. Regulatory guidance exists on extending this equipment's qualif... View full abstract»

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  • Optimal efficiency speed control of induction motors by variable rotor impedance

    Publication Year: 1989, Page(s):216 - 223
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (494 KB)

    An optimal method to control the speed of a wound-rotor induction motor by variable external rotor impedance is presented. The rotor impedance is adjusted so that, for any desired torque and slip values, the total copper losses are minimized. Motor efficiency is improved compared with the case of conventional speed control by variable rotor resistance only. An example illustrates the copper loss r... View full abstract»

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  • Synchronous machine parameters from sudden-short tests by back-solving

    Publication Year: 1989, Page(s):224 - 236
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1028 KB)

    The calculation of synchronous machine parameters from sudden short-circuit measurements has been subject to unnecessary assumptions and approximations. The authors describe the nature of these approximations and a procedure to remove them, and illustrate how a new philosophy for problem formulation and solution using backsolving programs can simplify and clarify the solution process. They introdu... View full abstract»

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  • Improvements in RF monitoring system on generators

    Publication Year: 1989, Page(s):237 - 243
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (559 KB)

    An improved RF monitoring system for generators is described. A capacitive coupling is shown to be much more sensitive than the currently used magnetic coupling through a current transformer. The increase in sensitivity results in an improved coupling between the generator's neutral grounding lead and the monitor. An RC high-pass filter is shown to be an effective coupler, because it does not atte... View full abstract»

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  • Rotor design of a 1000 MW superconducting generator

    Publication Year: 1989, Page(s):244 - 249
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (361 KB)

    A conceptual rotor design was developed for a 1000 MW superconducting generator having a high-initial-response excitation system. Field winding design, magnetic field analysis of the field winding, and loss calculations and force and stress analyses for the rotor body were carried out. The results are as follows: (1) the operating point of the field winding at the transient state is 72% of the sho... View full abstract»

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  • Analysis of the steady state characteristics of doubly fed synchronous machines

    Publication Year: 1989, Page(s):250 - 256
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (401 KB)

    A theoretical and experimental analysis of the steady-state characteristics of a doubly fed synchronous machine (DFSM) is presented. The basic equations and the equivalent circuit that represent the steady state of the DFSM are derived. In the experiments, a three-phase symmetrical wound-rotor terminals were connected to the three-phase bus, and the rotor terminals were connected to the slip-frequ... View full abstract»

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  • Performance evaluations of 50 MVA airgap winding stator for superconducting generator

    Publication Year: 1989, Page(s):264 - 271
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (781 KB)

    Structural features of a trial-manufactured air-gap winding stator for a 50 MVA superconducting generator and results of various characteristic tests are described. The stator has an improved winding section, strengthened against electromagnetic force and smaller due to use of a four-layer water-cooled helical air-gap armature winding. The axial flux through the stator core, assumed to be generate... View full abstract»

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  • A brushless, exciterless, single-phase, sinusoidal wave synchronous machine having an auxiliary stator winding

    Publication Year: 1989, Page(s):272 - 278
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    Analytical and experimental studies of a brushless, exciterless, single-phase, sinusoidal-wave synchronous machine operating as a generator or a motor, derived from a three-phase machine, are reported. One phase armature winding of the three-phase machine is used as an auxiliary stator winding of the single-phase machine and is used to supply the exciting power for the other two-phase armature win... View full abstract»

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  • A self-tuning stabiliser for excitation or governor control of power systems

    Publication Year: 1989, Page(s):152 - 159
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    A method based on the minimization of a quadratic performance index, is proposed for designing a self-tuning power system stabilizer. In the method, a linear model for stabilizer design is chosen, and a conventional performance index is so modified that, upon minimization, the optimal control law possesses an additional derivative term not found in the conventional control law. The method utilizes... View full abstract»

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  • Impact of shaft torsionals in steam turbine control

    Publication Year: 1989, Page(s):143 - 151
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (804 KB)

    Shaft torsional vibrations are discussed along with their effect on steam turbine-generator control following severe supply-network disturbances and the destabilization of shaft torsional modes through the action of high-speed electrohydraulic controllers. It is shown that shaft flexibility can exert a significant influence on steam turbine-generator response following a severe supply-system distu... View full abstract»

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  • Experimental determination of the forward and backward-field torque in shaded-pole motors

    Publication Year: 1989, Page(s):257 - 263
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    An experimental method for determining the forward- and backward-field torque and the amplitude of a pulsating torque at twice the line frequency in shaded-pole motors is developed on the basis of revolving-field theory. These parameters are determined from the induced voltage in a measured winding by segregating a forward and backward fundamental component using a spectrum analyzer. This torque-m... View full abstract»

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  • Design features of the Murray Hydroelectric Project

    Publication Year: 1989, Page(s):160 - 165
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The Murray Hydroelectric Project, a two-unit, 39 MW total rated capacity, run-of-the-river facility located on the Arkansas River, is described. The emphasis of the paper is on the project's electrical features. The two generating units are of an open-pit design with horizontal double-regulated turbines. Turbine rated speed in 46 RPM. The generator is rated 22.77 MW at a power factor of 0.9. The r... View full abstract»

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  • Utilization of commercial-grade items in nuclear safety applications

    Publication Year: 1989, Page(s):204 - 210
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    A summary is presented of a methodology for the evaluation, acceptance, and use of commercially procured items for nuclear safety applications. The methodology has been developed through the: research and compilation of existing codes, standards, regulations and guidance; compilation of existing practices and procedures; and the development of a generic process for all components and subcomponents... View full abstract»

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  • Electric utility experience with solar photovoltaic generation

    Publication Year: 1989, Page(s):166 - 171
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    A review of electric utility experience with solar photovoltaic (PV) generation is presented, covering both central stations and smaller commercial and residential systems. Design and operational difficulties and their solutions are included. The author summarizes the experiences of PV power plant operations in the Carolinas, Georgia, California, Texas, New England, Wisconsin, Pennsylvania, Arizon... View full abstract»

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  • Core loss in buried magnet permanent magnet synchronous motors

    Publication Year: 1989, Page(s):279 - 284
    Cited by:  Papers (57)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    The steady-state core-loss characteristics of buried-magnet synchronous motors operating from a sinusoidal constant frequency voltage supply are investigated. Measured and calculated core loss, with constant shaft load, is shown to increase with decreasing terminal voltage due to an increase in armature reaction-induced stator flux-density time harmonics. Finite-element modeling is used to show th... View full abstract»

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  • Cloud effects on distributed photovoltaic generation: slow transients at the Gardner, Massachusetts photovoltaic experiment

    Publication Year: 1989, Page(s):184 - 190
    Cited by:  Papers (73)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    The Photovoltaic Generation Effects project was undertaken to verify that no serious consequences arise from the interconnection of distributed photovoltaic generation on electric power distribution systems. Here, slow transient responses at frequencies corresponding to fluctuations of photovoltaic generation resulting from the passage of clouds over the experiment site in Gardner, Massachusetts, ... View full abstract»

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Aims & Scope

The IEEE Transactions on Energy Conversion includes in its venue the research, development, design, application, construction, installation, operation, analysis and control of electric power generating and energy storage equipment (along with conventional, cogeneration, nuclear, distributed or renewable sources, central station and grid connection). The scope also includes electromechanical energy conversion, electric machinery, devices, systems and facilities for the safe, reliable, and economic generation and utilization of electrical energy for general industrial, commercial, public, and domestic consumption of electrical energy.

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Meet Our Editors

Editor-in-Chief
Juri Jatskevich
University of British Columbia