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IEEE Transactions on Industry Applications

Issue 5 • Sep/Oct 1988

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Displaying Results 1 - 25 of 29
  • Torsional vibration resulting from adjustable-frequency AC drives

    Publication Year: 1988, Page(s):812 - 817
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    Torsional vibrations are a problem for the rapidly growing population of induction motor applications utilizing adjustable-frequency AC drives. The concepts used in analyzing torsional vibration are presented. Its effects on various system components are examined View full abstract»

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  • Microcomputer-based fault detection using redundant sensors

    Publication Year: 1988, Page(s):905 - 912
    Cited by:  Papers (15)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (692 KB)

    The design of a prototype device that implements a redundancy management scheme for online detection and isolation of faulty sensors in strategic facilities such as nuclear reactors, hazardous chemical plants, and advanced aircraft is presented. Such a device can potentially reduce the number of display devices in the control room and relieve the plant operator(s) from the tasks of assimilation an... View full abstract»

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  • Distribution line performance with imperfect grounding

    Publication Year: 1988, Page(s):805 - 811
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    The effects of ground contact resistance on the performance of overhead distribution lines are reviewed. Ground contact resistance is not negligible in many situations involving dry or rocky soil, for example, and can effect distribution lines with respect to customer voltage, losses under unbalanced loading, and neutral potential. It can also affect the voltages and currents that will be encounte... View full abstract»

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  • Network access protocols for real-time distributed control systems

    Publication Year: 1988, Page(s):897 - 904
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (732 KB)

    The concepts for pertinent network parameters are introduced, and an analytical base for system design is established. A simulation methodology has been developed for performance evaluation of real-time control system networks for distributed dynamical processes (e.g. autonomous manufacturing), electric power and chemical plants, and aircraft and spacecraft. The network-induced delays, resulting f... View full abstract»

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  • A production system for intelligent monitoring systems

    Publication Year: 1988, Page(s):862 - 865
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Conventional monitoring systems use data-collection techniques to obtain sensor data about various aspects of hazardous workplaces such as coal mines and provide warnings. However, they are ill-equipped for making complex decisions involving large amounts of interrelated data. Laser/RPS, a C language-based object-oriented production system, is presented, and those programming system features that ... View full abstract»

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  • Parameters affecting neutral-to-earth voltage along primary distribution circuits

    Publication Year: 1988, Page(s):798 - 804
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    It is essential to identify the type of primary distribution circuit and to have a thorough understanding of the sources of neutral-to-earth voltage in agricultural installations in order to achieve success when attempting to mitigate an elevated on-farm neutral-to-earth voltage level originating from off the farm. The authors discuss the primary electrical distribution system, describe the ways i... View full abstract»

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  • Status of mine monitoring and communications

    Publication Year: 1988, Page(s):820 - 826
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (908 KB)

    A brief summary of the history of university involvement in communications and monitoring in underground coal mines is presented, beginning with the first federal appropriation of funds in 1970 under the Coal Mine Health and Safety Act of 1969 and continuing through the first half of 1985. Insight is provided into significant trendsetting work done by these universities. The first US mine monitori... View full abstract»

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  • Modeling particulate charging in ESPs

    Publication Year: 1988, Page(s):922 - 927
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    In electrostatic precipitators there is a strong interaction between the particulate space charge and the operating voltage and current of an electrical section. Calculating either the space charge or the operating point when the other is fixed is not difficult, but calculating both self-consistently is much more difficult. A method is proposed that makes the problem straightforward. An iterative ... View full abstract»

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  • A nondiverging polar-form Newton-based power flow

    Publication Year: 1988, Page(s):870 - 877
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    The design of a mine electric power system requires that power-flow studies be conducted to guarantee that all motor operating and starting loads can be met while acceptable bus voltage levels are maintained. If future loads are overestimated, then the iterative techniques used to solve the system voltage profile will often diverge, leaving no clue for the designer as to the cause of the divergenc... View full abstract»

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  • Mine power system analysis

    Publication Year: 1988, Page(s):839 - 845
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    Procedures for the computer analysis of mine electrical power systems are summarized. Included are techniques relating to loadflow analysis, fault calculations, relay coordination, and motor starting. Actual programs may require conversational or file input data, and most are written in high-level languages such as FORTRAN, APL, or BASIC. The review covers algorithms developed over the past few ye... View full abstract»

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  • Application of dynamic braking to mine hoisting systems

    Publication Year: 1988, Page(s):884 - 896
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (912 KB)

    Accidents occurred on counterweighted mine hoisting systems when the mechanical brake failed while the cage was empty. This allowed the counterweight to fall to the bottom of the shaft, causing the cage to overspeed and crash into the headframe. Direct-current hoist motors have the potential for preventing this type of accident by incorporating a passive electrical braking system known as dynamic ... View full abstract»

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  • Sensitive ground-fault relaying

    Publication Year: 1988, Page(s):853 - 861
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    Sensitive ground-fault protection refers to the concept of detecting low levels of ground-fault current that might cause electrocution of any human that becomes part of the ground-current path and providing warnings. The concepts behind sensitive ground-fault relaying for use on AC and DC low-voltage utilization systems are covered. The background for these relaying types is presented, and it is s... View full abstract»

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  • Feasibility of adaptive distribution protection system using computer overcurrent relaying concept

    Publication Year: 1988, Page(s):792 - 797
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    The technical feasibility and economic viability of an adaptive distribution protection system (ADPS) using a computer overcurrent relaying concept are examined. Computer overcurrent relays installed on each of the feeders and tap locations (where the reclosers are installed) continuously monitor and analyze line currents and voltages and interface with the substation and system computer to provid... View full abstract»

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  • A fast recursive solution for induction motor transients

    Publication Year: 1988, Page(s):758 - 764
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    A fast and accurate algorithm for determining induction-motor transient behavior is presented. The fast components of the stator transients are decoupled from the machine flux linkage equations by a linear transformation. The resulting differential equations are then solved by using recursive algebraic equations, which require considerably less computational effort than existing methods. An exampl... View full abstract»

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  • An experimental study of short-circuit currents on a low-voltage system

    Publication Year: 1988, Page(s):940 - 946
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    An experimental study of short-circuit currents on a low-voltage power system was conducted to determine whether the fault current level can be accurately predicted from supply impedance measurement at supply frequency. The related question of whether the power system can be modeled by a series X-R impedance for the purpose of fault-level calculation is also considered. A practic... View full abstract»

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  • Prepayment for electric service with the PowerStat

    Publication Year: 1988, Page(s):777 - 781
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    The PowerStat is an electric power information and control system designed to reduce electric costs to the consumer. The system eliminates conventional meter reading and billing schedules and allows the consumer to pay for his electricity at any time and on any regular or random schedule desired. The PowerStat is owned by the utility company and installed in each residence or place of business to ... View full abstract»

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  • Mine electrotechnology research: the past 17 years

    Publication Year: 1988, Page(s):818 - 819
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    The direct results on the mining industry of the research program sponsored by the US Bureau of Mines over the last decade and a half include increased safety, increased productivity, a better working environment for miners, and a more secure supply of minerals to the US economy. Some important technical developments in the electrical area that have taken place are: the development of mine monitor... View full abstract»

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  • Transient analysis of charged droplet motion and corona-induced velocity perturbations during electrostatic deposition processes

    Publication Year: 1988, Page(s):913 - 921
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    The time-varying characteristics of charged-droplet motion have been investigated. A three-dimensional electrostatically shielded target, having an interior or exterior point as well as a solid spherical target with a topside point, underwent spraying characterized by a rising and then decaying space-charge field as the target was traversed at 5 km/h by -4 C/kg spray. During the 1 s spraying event... View full abstract»

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  • Knowledge organization and inference engine for the WVU Face Decision Support System

    Publication Year: 1988, Page(s):866 - 869
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    The knowledge-based organization for the West Virginia University Face Decision Support System is given, along with the initial development of the associated inference engine. The knowledge base contains generic knowledge about underground coal mines that utilize continuous miners. A typical knowledge entry is given, and the inference engine methodology is explained. The engine utilizes this knowl... View full abstract»

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  • Mine power system reliability

    Publication Year: 1988, Page(s):827 - 838
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (968 KB)

    The research done over the last decade or so to apply the principles of reliability theory to mine electrical power systems is summarized. The multifaceted effort to estimate the failure rates of equipment applicable to the mine environment is examined, and the use of fault-tree analysis to predict the probability of hazardous voltages on the frames of various pieces of mining equipment is dealt w... View full abstract»

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  • Production of ozone by surface and glow discharge at cryogenic temperatures

    Publication Year: 1988, Page(s):928 - 933
    Cited by:  Papers (8)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    The generation of ozone at cryogenic temperatures is investigated with a special interest in increasing the yield of ozone by using low temperatures of liquid natural gas. Two modes of plasma chemical processes are studied, both based on electric discharges: one is the high-frequency surface discharge mode under ordinary gas pressure and at a temperature above the liquid temperature of ozone at th... View full abstract»

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  • Spark ignition probability estimates for resistor and inductor circuits in methane-air atmospheres

    Publication Year: 1988, Page(s):878 - 883
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    The safety factor presently used by the US Mine Safety and Health Administration to assess the safety of electronic circuits for use in methane-air atmospheres is a factor of 1.5 on energy at the point of test plus two worst-case faults. The Bureau of Mines is engaged in intrinsic safety research that will ultimately relate the conditions of test and actual use by estimating the simple ignition pr... View full abstract»

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  • Mine power-system ground research

    Publication Year: 1988, Page(s):846 - 852
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    The unique problems associated with mine power system grounding are described, and the efforts that have gone on in this area over the years are traced. Special emphasis is given to efforts funded by the US Bureau of Mines. These include efforts aimed at improving ground-check monitor performance, designing and measuring the resistance of safety ground beds, analyzing ground-system safety and effe... View full abstract»

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  • Hot surface ignition system

    Publication Year: 1988, Page(s):765 - 771
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    A hot-surface ignition (HSI) system that controls the operation of industrial gas-fired appliances with levels of safety, reliability, and versatility never before achieved is presented. A microcomputer-based control module provides multilevel component fault tolerance in critical areas such as the flame-sensing and valve-control circuits. The program in the control module negates unsafe operation... View full abstract»

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  • Harmonic filters for notch reduction

    Publication Year: 1988, Page(s):947 - 954
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (788 KB)

    The problems encountered when sophisticated electronic equipment and DC converter drives share the same 480 V bus are described. The problem-solving and design decisions in specifying filter equipment for notch reduction are discussed. The predicted filter performance is presented View full abstract»

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Aims & Scope

The scope of the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS includes all scope items of the IEEE Industry Applications Society, that is, the advancement of the theory and practice of electrical and electronic engineering in the development, design, manufacture, and application of electrical systems, apparatus, devices, and controls to the processes and equipment of industry and commerce; the promotion of safe, reliable, and economic installations; industry leadership in energy conservation and environmental, health, and safety issues; the creation of voluntary engineering standards and recommended practices; and the professional development of its membership.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Thomas A. Nondahl
t.nondahl@ieee.org