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IEE Proceedings C - Generation, Transmission and Distribution

Issue 6 • Date September 1986

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Displaying Results 1 - 9 of 9
  • How HVDC schemes can excite torsional oscillations in turbo-alternator shafts

    Publication Year: 1986, Page(s):301 - 307
    Cited by:  Papers (14)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (917 KB)

    Recent experience has shown that a variable-frequency drive of modest size produced torsional oscillations in a turbo-alternator shaft which were of such a level as to put the shaft at risk. The paper therefore describes a method by which such subsynchronous frequencies can be identified and calculated. The method used considers the convertor as a type of modulator capable of producing sideband fr... View full abstract»

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  • Determination of stabiliser settings in multimachine power systems

    Publication Year: 1986, Page(s):308 - 313
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (601 KB)

    The paper considers a novel approach to simultaneous calculation of the adjustable parameters of all the stabilisers in a multimachine power system to obtain the best dynamic performance. The parameter optimisation problem is based on an eigenvalue assignment formulation, and an algorithm enabling the needed shift of dominant system modes is presented. The proposed algorithm is used to set gains o... View full abstract»

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  • Catastrophe theory applied to transient stability assessment of power systems

    Publication Year: 1986, Page(s):314 - 318
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (510 KB)

    The application of catastrophe theory to the steady-state stability analysis of power systems has been reported previously. The paper details the use of catastrophe theory to assess the transient stability of power systems. It is shown that the stability region can be easily defined, using catastrophe theory, and is valid for changing load conditions and fault locations so that the stability of th... View full abstract»

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  • Incorporation of weather effects in transmission system models for composite system adequacy evaluation

    Publication Year: 1986, Page(s):319 - 327
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1033 KB)

    This paper illustrates the development and analysis of several transmission system models which include varying weather conditions for composite system reliability assessment. The failure rate of an outdoor component can be much higher in stormy weather than that in normal weather periods. The probability of overlapping failures in stormy weather, therefore, can be much greater than that in normal... View full abstract»

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  • Statistical electricity demand modelling from consumer billing data

    Publication Year: 1986, Page(s):328 - 335
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (729 KB)

    The paper develops a statistical framework for the modelling of electricity consumption distributions. The method is based directly upon consumer billing data and it is shown that a generalised form of the Weibull distribution model may be successfully applied. Illustrative results are given for a sample of 1653 consumers in the public housing sector. It is concluded that two statistically separat... View full abstract»

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  • Modelling of domestic hot-water heater load from online operating records and some applications

    Publication Year: 1986, Page(s):336 - 345
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1353 KB)

    In the paper, the problems involved in modelling domestic hot-water heater loads are discussed. The hot-water heater load modelling problem is divided into two parts: load shedding and load restoration. By considering the `instantaneous┬┐┬┐ load recordings during normal day-to-day operations of the system, and the measurements obtained from a small representative area, the parameters describing the ... View full abstract»

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  • Proximity effect between an earthing grid and external electrodes in an earthing system of high-voltage installations

    Publication Year: 1986, Page(s):346 - 352
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (842 KB)

    The paper presents an original analytical procedure for obtaining a relatively simple mathematical relation which can accurately include the influence that the surrounding ground potential of an earthing grid has on the nearby sections of continuously earthed cable sheaths or other, similar, earthing electrodes radiating from the main earthing grid. Its effect influences the distribution of fault ... View full abstract»

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  • Transformer inrush currents and their associated overvoltages in HVDC schemes

    Publication Year: 1986, Page(s):353 - 358
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (813 KB)

    The paper describes a method of studying the inrush current associated with the energisation of a large transformer. The method has been used to examine the harmonic content of the inrush current in an HVDC convertor station and to show how this high level of harmonic current can cause overvoltages. The role played by the AC system impedance and damping is examined. An interesting conclusion is dr... View full abstract»

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  • Fundamental aspects of fault location algorithms used in distance protection

    Publication Year: 1986, Page(s):359 - 368
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1107 KB)

    The paper considers fundamental problems involved in the precise location of faults on high-voltage transmission lines. The influence of pre-fault load on the distance-to-fault measurement problem is analysed and a new method of accounting for load effects is presented. Two of the algorithms considered are precise, containing no simplifying assumptions and their overall accuracy is limited only by... View full abstract»

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