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IEE Proceedings C - Generation, Transmission and Distribution

Issue 2 • Date March 1991

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Displaying Results 1 - 6 of 6
  • Effects of abnormal operating conditions on electrical utility planning

    Publication Year: 1991, Page(s):113 - 120
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (777 KB)

    Many forecasters have examined normal electricity consumption on long and short time scales, on both a national and an individual basis. This analysis is adequate for normal operating conditions but does not contain any information on the response to an uncertain supply or the effects of energy source depletion. The authors expand the information available by examining the usage of electricity by ... View full abstract»

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  • Theory of transformer modelling using modal analysis

    Publication Year: 1991, Page(s):121 - 128
    Cited by:  Papers (12)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (640 KB)

    The author proposes a new structure for transformer models aimed at compact accurate representation of multiwinding transformers under general transient conditions. The author shows how the fundamental integro-differential equations describing a general transformer may be handled numerically, to give a matrix form corresponding to the Fredholm form of classical transformer analysis. Numerical mani... View full abstract»

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  • Worst case studies of short-circuit making-currents

    Publication Year: 1991, Page(s):129 - 134
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (575 KB)

    Short-circuit peak currents exceeding the testing value according IEC standards can be caused by the nonsimultaneous closing of the poles of a circuit breaker during switching or reclosing while the network is in short-circuit state and by the successive involvement of the three phases during the development of a three-phase fault as well. The authors treat the theoretical relations of the short-c... View full abstract»

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  • Role and objectives of control for wind turbines

    Publication Year: 1991, Page(s):135 - 148
    Cited by:  Papers (36)  |  Patents (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1434 KB)

    Variable pitch is used in many wind turbines to regulate power generation. The choice of control objectives is broadly examined together with the influence of the controller on the dynamics of the wind turbine.<> View full abstract»

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  • Modified loss coefficients in the determination of optimum generation scheduling

    Publication Year: 1991, Page(s):166 - 172
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (483 KB)

    A modified method is evolved to form the loss coefficients of an electrical power system network by decoupling load and generation and thereby creating additional fictitious load buses. The system losses are then calculated and co-ordinated to arrive at an optimum scheduling of generation using the standard co-ordination ( lambda iteration) equation. The method presented is superior to the ones cu... View full abstract»

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  • Value of variable sources on power systems

    Publication Year: 1991, Page(s):149 - 165
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1708 KB)

    The author examines the value of variable power sources, such as wind and tidal energy, on electricity supply systems. A statistical approach is developed for assessing the operational impacts, including thermal plant cycling and operating reserve requirements. It is shown from this analysis that operating penalties are negligible when the capacities involved are small relative to the overall syst... View full abstract»

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