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IEE Proceedings C - Generation, Transmission and Distribution

Issue 6 • Date Nov. 1988

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Displaying Results 1 - 9 of 9
  • Fast methods for direct assessment of power system transient stability

    Publication Year: 1988, Page(s):469 - 473
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (418 KB)

    The authors present a new and simple method for transient stability assessment of multi-machine power systems. The criterion for assessment is given in terms of the rate of change of kinetic energy of individual machines subsequent to fault clearance. The basic concepts and the mathematical formulation of the method are summarised. A number of practical test systems are used to demonstrate the sup... View full abstract»

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  • Incorporation of load models in the direct method of power system transient stability

    Publication Year: 1988, Page(s):474 - 479
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (496 KB)

    In the current reduced network formulation of the transient energy function method, all system loads are conventionally modelled as constant-impedance load to reduce the network to the internal nodes of the generators. Neglecting other types of load model (e.g. constant-power and constant-current load models), as in current approaches, may lead to incorrect results. The authors describe the inclus... View full abstract»

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  • Prediction of DC load-rejection dynamic overvoltages using pattern recognition

    Publication Year: 1988, Page(s):480 - 486
    Cited by:  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (625 KB)

    Power system DC load-rejection may result in system dynamic overvoltages sometimes followed by generator self excitation. These overvoltages may be unacceptably high. The authors introduce a new pattern-recognition-based algorithm to predict power system load-rejection overvoltages. Using a power system digital simulation, a training set of a wide range of system loading conditions is created. A d... View full abstract»

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  • Block pulse functions based algorithm for symmetrical components calculation

    Publication Year: 1988, Page(s):487 - 488
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (172 KB)

    The author presents the development of an algorithm for symmetrical components calculation in power system relaying signals. The fundamental frequency components of the power system signals are first computed using a block pulse functions based algorithm, and then the symmetrical components transform is applied to obtain the sequence components.<> View full abstract»

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  • Circuit allocation in subtransmission switching substations using best-first search strategy

    Publication Year: 1988, Page(s):489 - 496
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (782 KB)

    Based on the best-first search strategy, the authors develop a general computational model for the automatic determination of circuit allocation schemes in subtransmission substations. Starting from a discussion of the allocation requirements, fault indices based on the percentage of power rating loss of circuits are first derived. The best-first strategy is then defined by the group allocation an... View full abstract»

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  • Proximity effects on the ground fault current distribution within the earthing system formed by a substation and the associated transmission lines

    Publication Year: 1988, Page(s):497 - 502
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (461 KB)

    The analysis of currents flowing through a substation earth electrode and through earth wires of overhead lines, connected to the substation for ground faults within the substation, is performed, including the proximity effects between the substation and the earth electrodes of the line towers. Comparison of the results obtained using the complete model suggested by the authors, with the results o... View full abstract»

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  • Ripple control interference at irrigation installations

    Publication Year: 1988, Page(s):503 - 509
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (687 KB)

    Series resonance at ripple carrier frequencies, between distribution transformers and power-factor correction capacitors, has occurred at irrigation installations in the North Canterbury Electric Power Board's rural supply area. Inductor blocking to relocate the series resonance at a lower frequency is discussed. A low-cost inductor suitable for practical use is suggested. The use of interactive l... View full abstract»

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  • Arc transfer in a rotary arc circuit breaker

    Publication Year: 1988, Page(s):511 - 517
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (620 KB)

    Rotary arc circuit breakers interrupt low-level fault currents through the extinction of a free burning arc between the load current contacts but utilise an electromagnetic field for spinning the arc, transferred into a coil, for interrupting high-level fault currents. The operation of such circuit breakers relies upon using the arc additionally for switching the coil into the circuit to produce t... View full abstract»

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  • Software control of static reactive current compensators

    Publication Year: 1988, Page(s):518 - 527
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (803 KB)

    The various control functions of a static TCR reactive current compensator can be implemented by software. A fast and versatile microprocessor-based control scheme has been developed which can be easily adapted to suit different power system requirements. Its useful applications to regulate and symmetrise 3-phase voltages and to improve dynamic stability of a power system are particularly examined... View full abstract»

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