IEEE WESCANEX 95. Communications, Power, and Computing. Conference Proceedings

15-16 May 1995

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  • IEEE WESCANEX 95. Communications, Power, and Computing. Conference Proceedings

    Publication Year: 1995
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    Freely Available from IEEE
  • List of keywords

    Publication Year: 1995
    Request permission for commercial reuse | PDF file iconPDF (222 KB)
    Freely Available from IEEE
  • List of authors

    Publication Year: 1995
    Request permission for commercial reuse | PDF file iconPDF (113 KB)
    Freely Available from IEEE
  • Survey of voiceband data signal compression

    Publication Year: 1995, Page(s):361 - 365 vol.2
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Today's public switched telephone networks are being upgraded to use digital transmission and switching. The main disadvantage of digital transmission is the higher bandwidth required. To alleviate this problem, much research has been devoted into the compression of digitized voice signals. However, such compression techniques tend to have adverse effects on non-voice signals such as modems and fa... View full abstract»

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  • Autonomous power management system for a small satellite

    Publication Year: 1995, Page(s):312 - 317 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    An argument that a fuzzy system design methodology is better suited for the design of autonomous power systems than the currently used classical expert system methodology is presented. An architecture that incorporates fuzzy systems is developed for designing autonomous power management systems. The architecture was designed to meet both present and projected future technological requirements for ... View full abstract»

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  • A new positive sequence directional element for numerical distance relays

    Publication Year: 1995, Page(s):334 - 339 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    This paper describes a new positive sequence directional element for use in numerical distance relays. Results are shown for the performance of the element in relays on the Manitoba Hydro network during disturbances and from tests on the Real Time Digital Simulator (RTDS) in the Power Systems Laboratory at the University of Manitoba View full abstract»

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  • Evaluation of the marginal outage costs in interconnected generating systems

    Publication Year: 1995, Page(s):355 - 360 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    This paper describes a methodology for calculating the marginal outage costs in interconnected generating systems. The proposed method quantifies the impact of capacity assistance from neighboring systems on the marginal outage cost. The effect of selected interconnection topologies and modeling assumptions on these costs is also presented in order to illustrate how simplified representations can ... View full abstract»

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  • Application of modern power electronics in power tapping from HVDC transmission systems

    Publication Year: 1995, Page(s):306 - 311 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    In this paper, the problem of small power tapping from HVDC transmission systems is presented, and a practical solution, based on the solid state devices currently available in the market, is proposed. The proposed scheme, is then digitally simulated with the aid of the EMTDC/PSCAD software package. Simulation results prove the practicality of the proposed scheme. The performance of the control sy... View full abstract»

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  • HVDC transmission system models for power system reliability evaluation

    Publication Year: 1995, Page(s):501 - 507 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    High voltage direct current transmission (HVDC) systems are finding increased use for long distance transmission of electrical energy from remote hydro electric generating stations to the load centers. The area of reliability evaluation of HVDC transmission systems has not attracted much attention in the past. The situation is changing as more and more DC links are being built, the need to develop... View full abstract»

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  • A Faraday effect based clamp-on magneto-optical current transducer for power systems

    Publication Year: 1995, Page(s):329 - 333 vol.2
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    A new type of Faraday effect based magneto-optical current transducer (MOCT) has been developed. This paper presents the theoretical background, engineering design, and test results of this clamp-on MOCT. The sensor consists of two separate clamp-on parts. This design avoids the need to break the current carrying circuit in order to have the conductor enclosed by the optical path while keeping the... View full abstract»

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  • A generalized method for distribution system reliability evaluation

    Publication Year: 1995, Page(s):349 - 354 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    This paper presents a practical technique which can be used to simplify the procedure for determining the reliability indices of radial distribution systems with branches. A digital computer program has been developed using this technique. The paper illustrates the application of the developed program to two practical distribution system configurations View full abstract»

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  • RTDS-a fully digital power system simulator operating in real time

    Publication Year: 1995, Page(s):300 - 305 vol.2
    Cited by:  Papers (54)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    This paper presents details on the design, architectural features and applications of a real-time digital simulator (RTDS) developed at the Manitoba HVDC Research Centre (Winnipeg, Canada). Custom hardware and software have been developed and collectively applied to the simulation and study of electromagnetic transients phenomenon in power systems in real-time. The combination of real-time operati... View full abstract»

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  • Transient analysis and genetic algorithms for classification

    Publication Year: 1995, Page(s):432 - 437 vol.2
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    This paper presents a method of generating unique fingerprints of radio transmitter turn-on transients. The fingerprinting system consists of the application of multiresolution wavelet analysis used to characterize the features contained in the transient followed by the use of a genetic algorithm to extract the wavelet coefficients that represent critical features of the transient. To measure the ... View full abstract»

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  • High-speed differential protection of parallel teed transmission lines

    Publication Year: 1995, Page(s):495 - 500 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    This paper presents high-speed differential protection algorithm for parallel-teed transmission lines. The algorithm uses distributed parameter models of the transmission lines and synchronized sampling of data at the terminals of the line. A method that takes the unsynchronised data and generates synchronised information is described. The proposed algorithm uses a segregated scheme, facilitates t... View full abstract»

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  • Optical fibre alignment using micromachines

    Publication Year: 1995, Page(s):371 - 376 vol.2
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    This paper discusses the use of micromachined actuators for aligning optical fibres. A number of test actuators including comb structures, magnetic fluid positioners, piezoelectric fibre positioners and electrostatic micro-relays have been designed. Some of these structures were post-processed using the anisotropic etchants EDP and TMAH. Experiments with etchants revealed that multilayer aluminum/... View full abstract»

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  • Inrush restraint algorithms for transformer differential relays

    Publication Year: 1995, Page(s):321 - 328 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    When a power transformer is energized, the resulting inrush current can cause a differential relay to issue a false trip signal. Traditionally, the second harmonic content of the inrush current has been used as a form of pattern recognition to distinguish between this current and legitimate internal fault current. Other forms of pattern recognition have been suggested, particularly one in which th... View full abstract»

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  • Simulation of a pacing control system for a reversing mill

    Publication Year: 1995, Page(s):344 - 348 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    The pacing problem is to determine when is the most economic time to draw the slab from the reheat furnace in order to decrease the idle time in the steel finishing mill. This pacing decision depends on the likelihood of delay. The benefit and the cost of the pacing system is assessed by a simulation using the actual operational data View full abstract»

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  • A hybrid architecture for Hopfield neural networks and its GaAs implementation using CCDs as storage elements

    Publication Year: 1995, Page(s):445 - 450 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    A hybrid architecture for Hopfield artificial neural networks and its GaAs implementation are described in this paper. This approach merges parallel summation and multiplication and serial neuron state updating. For a N×N network, only N multipliers and one neuron activation function are needed View full abstract»

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  • Evaluation of harmonic impedance presented by a thyristor controlled AC load

    Publication Year: 1995, Page(s):258 - 263 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    The growing use of thyristor controlled loads in AC distribution systems is a major cause of increased level of harmonics which have many other detrimental effects on power system operation. One aspect of interest to the electric utility is the harmonic impedance presented by the power converter/load to the distribution system. In this preliminary investigation, the harmonic impedance of a power c... View full abstract»

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  • Evaluating interaction between high speed power system controllers

    Publication Year: 1995, Page(s):270 - 275 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    Control coordination of fast acting voltage devices is considered of great significance in the electric utility industry as the existing transmission systems are expected to operate at higher loadings. Coordination of the controls of static VAr compensators, DC transmission systems and power system stabilizers will maximize the loading capability of the network. The available study tools are ident... View full abstract»

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  • Application of electromagnetic transient simulation for the solution of HVDC control problems

    Publication Year: 1995, Page(s):283 - 288 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    The paper describes how an electromagnetic transient simulation program (EMTPDC) was used in the design of modifications to the controls of an HVDC converter that was experiencing commutation failures from AC voltage disturbances. These events were reviewed by the valve supplier and two control modifications were proposed. The purpose of the simulation study was first to reproduce measurements rec... View full abstract»

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  • Steel scheduling optimization for IPSCO's rolling mill and reheat furnace

    Publication Year: 1995, Page(s):294 - 299 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    Energy savings and higher production rates are two important objectives that today's iron and steel industry is trying to achieve. One of the possible ways to reach these targets is through optimal production scheduling. In this paper, an iron and steel production scheduling problem is studied. An efficient algorithm based on a modified enumeration procedure is developed to solve the problem withi... View full abstract»

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  • An algebraic construction method for cellular neural networks

    Publication Year: 1995, Page(s):427 - 431 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    An algebraic method for construction of a cellular neural network (CNN) is derived. Using this method, CNNs for connected component detection and the maze problem are given in detail. Because the transition of states is included in the algebraic equations during the construction of the network, the network arrives at a unique solution in either a synchronous or an asynchronous operation process, a... View full abstract»

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  • Synthesizing testability features into a design with the Synopsys Test Compiler

    Publication Year: 1995, Page(s):462 - 467 vol.2
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    In this paper, we present a methodology for synthesizing testability features in a design described using Hardware Description Language (HDL) and the Synopsys Test Compiler tool. Because an HDL described design of an IC device can be automatically transformed into a gate-level implementation for a given technology with Synopsys Synthesis Tools, adding internal scan test circuitry or boundary scan ... View full abstract»

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  • Neural code-excited linear prediction for low power speech compression

    Publication Year: 1995, Page(s):415 - 420 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    In this paper, we discuss the use of artificial neural learning methods for low bit-rate speech compression, potentially in non-stationary environments. Unsupervised learning algorithms are particularly well-suited for vector quantization (VQ) which is used in many speech compression applications. We discuss two unsupervised learning algorithms: frequency-sensitive competitive learning and Kohonen... View full abstract»

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