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Generation, Transmission and Distribution, IEE Proceedings C

Issue 6 • Date November 1982

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Displaying Results 1 - 13 of 13
  • Load-curtailment model for economic loading of thermal generation

    Publication Year: 1982 , Page(s): 233 - 238
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (646 KB)  

    Economic loading of thermal generation systems has to take account of possible generation loss. A frequently stated requirement is that there should be sufficient emergency reserve to cover loss of the largest infeed. The cost of fulfilling this requirement can be considerable in the case of small systems, where the largest infeed is likely to be a significant proportion of installed capacity. A m... View full abstract»

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  • Availability modelling of stochastic power sources

    Publication Year: 1982 , Page(s): 239 - 248
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1385 KB)  

    Energy sources which are stochastic in their behaviour include solar radiation, wind energy and run-of-the-river hydroplant. In addition to conventional considerations of plant availability, reliability models for these sources must also represent the stochastic character of the prime energy supply. The paper initially develops probabilistic models for representing power availability and then proc... View full abstract»

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  • Dynamic behaviour of a 25m variable-geometry vertical-axis wind-turbine generator

    Publication Year: 1982 , Page(s): 249 - 259
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1055 KB)  

    The paper describes the development of a dynamic model of a 25 m variable-geometry vertical-axis wind turbine coupled to a generator which is in turn connected to the public electricity supply system. The model represents a 25 m prototype machine which it is proposed to be built at Carmarthen Bay in South Wales. This work was carried out as part of a detailed design study of the 25 m prototype, su... View full abstract»

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  • Analysis of self-excited induction generators

    Publication Year: 1982 , Page(s): 260 - 265
    Cited by:  Papers (45)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (663 KB)  

    An analytical technique using the `Newton-Raphson┬┐┬┐ method is presented to identify the saturated magnetising reactance and the generated frequency of a self-excited induction generator for a given capacitance, speed and load. The technique is shown to be very efficient in analysing such systems under steady state. Computed results are compared with the experimentally obtained values on a laborato... View full abstract»

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  • Equivalent circuit representation of a superconducting alternator

    Publication Year: 1982 , Page(s): 266 - 277
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1215 KB)  

    An equivalent circuit has been derived to represent the d and q axes of an air-cored superconducting alternator. The windings and screens in the machine are represented by the branches in the ladder-type network. The circuits have been used to obtain expressions for the damping coefficients and screening ratios during small oscillations. A modified screening ratio is proposed which differs from th... View full abstract»

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  • Co-ordinated single-variable excitation control and governing of turboalternators

    Publication Year: 1982 , Page(s): 278 - 284
    Cited by:  Papers (3)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (864 KB)  

    The feasibility of implementing a control strategy for the co-ordinated excitation control and governing of an AC turbogenerator is examined. The proposed control scheme uses only one extra control signal, that of rotor acceleration, in addition to the two conventional feedback signals of terminal voltage into the excitation system and rotor-speed deviation into the governing system. Theoretical s... View full abstract»

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  • Optimisation of discrete-type load-frequency regulators considering generation-rate constraints

    Publication Year: 1982 , Page(s): 285 - 289
    Cited by:  Papers (8)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (601 KB)  

    In the paper a method of designing discrete-type load-frequency regulators of a two-area reheat-type thermal system with generation-rate constraints is presented. The construction of the regulators is based on the conventional tie-line bias control. The regulator parameters are optimised by minimisirig a discrete-type quadratic performance index with a term for presenting a generation-rate constra... View full abstract»

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  • Some aspects of multilevel load-frequency control of a power system

    Publication Year: 1982 , Page(s): 290 - 294
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (474 KB)  

    The application of multilevel control strategies for load-frequency control of interconnected power systems is assuming importance. A large multiarea power system may be viewed as an interconnection of several lower-order subsystems, with possible change of interconnection pattern during operation. The solution of the control problem involves the design of a set of local optimal controllers for th... View full abstract»

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  • Foundation uplift resistance: The effects of foundation type and of seasonal changes in ground conditions

    Publication Year: 1982 , Page(s): 295 - 305
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1529 KB)  

    Various theories for estimating foundation uplift design are discussed. The shape of the foundation and the way it has been constructed, the type of applied loading and the strength of the soil surrounding the foundation, all affect its uplift behaviour. Tests on all these aspects are described. It is possible that any one of the above factors could be the cause of a foundation being under design ... View full abstract»

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  • Power-system digital back-up protection

    Publication Year: 1982 , Page(s): 306 - 314
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (984 KB)  

    The purpose of power-system back-up protection is to disconnt faulty primary equipment not isolated by the main protection and associated circuit breakers. Conventional back-up techniques are difficult to apply in a large power system and heavy reliance on main protection is required. In this paper, both substation-based and centrally co-ordinated back-up protection methods, using microprocessors ... View full abstract»

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  • Accurate representation of commutation overlap effects in steady-state multi AC/HVDC link studies

    Publication Year: 1982 , Page(s): 315 - 317
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (387 KB)  

    Most steady-state HVDC link representations, such as multi AC/HVDC loadflow analysis and state estimation, do not model commutation overlap angle effects; instead they assume convertor switching to be instantaneous. A simple technique is presented and tested which allows the commutation overlap to be explicitly included in conventional HVDC link representation with only a slight modification. The ... View full abstract»

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  • Conference report. Third international conference on sources and effects of power system disturbances

    Publication Year: 1982 , Page(s): 317 - 319
    Save to Project icon | PDF file iconPDF (469 KB)  
    Freely Available from IEEE
  • IEE Conference Publication 210

    Publication Year: 1982 , Page(s): 319 - 320
    Save to Project icon | PDF file iconPDF (264 KB)  
    Freely Available from IEEE