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IEE Proceedings C - Generation, Transmission and Distribution

Issue 1 • Date Jan. 1993

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Displaying Results 1 - 8 of 8
  • Voltage stability analysis of electric power systems with frequency dependent loads

    Publication Year: 1993, Page(s):1 - 6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (557 KB)

    During the last decade great attention has been devoted in the technical literature to voltage stability problems of interconnected power systems. However, power system operators have found that voltage collapses often occur in a real system at a load condition different from the one predicted by simulation studies. One of the causes that makes the use of present approaches unreliable is the lack ... View full abstract»

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  • Decoupled power flow solution method for well-conditioned and ill-conditioned power systems

    Publication Year: 1993, Page(s):7 - 10
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (247 KB)

    A decoupled power flow solution method for well- and ill-conditioned power systems is derived. The proposed method is simple, has no mathematical approximations and requires less storage and computational time than either the Newton-Raphson (NR) method for ill-conditioned systems of the fast decoupled (FD) method for well-conditioned systems. In the derived method, the power flow is decoupled into... View full abstract»

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  • Robust load-frequency controller design for power systems

    Publication Year: 1993, Page(s):11 - 16
    Cited by:  Papers (43)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (328 KB)

    A robust controller, based on the Riccati equation approach, is proposed for power system load-frequency control. Only the bounds of the system parameters are required to design the robust load-frequency controller. The proposed robust controller is simple, effective and can ensure that the overall system is asymptotically stable for all admissable uncertainties. Simulation results show that, for ... View full abstract»

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  • Two-stage power-system-distribution-planning algorithm

    Publication Year: 1993, Page(s):17 - 29
    Cited by:  Papers (18)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (966 KB)

    A two-stage power system distribution planning algorithm is developed for solving sizing, location and timing problems of distribution substations and primary feeders. This comprehensive algorithm involves an accurate small-area electric load forecasting procedure, and provides the flexibility for both static- and dynamic-planning application modes. Also, the algorithm includes a new nondiscrete p... View full abstract»

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  • Short-circuit tests on current-limiting fuses: modelling of the test circuit

    Publication Year: 1993, Page(s):30 - 36
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (484 KB)

    In the standard procedures for high power short-circuit testing of current-limiting fuses, the test circuit is conventionally characterised by the RMS test voltage, prospective current, frequency, closing angle, and power factor. From these parameters a constant RL equivalent circuit can be derived, which has been widely used in the modelling of fuse-breaking transients but recent studies have sho... View full abstract»

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  • Travelling-wave-based protection of double-circuit lines

    Publication Year: 1993, Page(s):37 - 47
    Cited by:  Papers (12)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (832 KB)

    Double-circuit current comparison protection (DCCCP) is an algorithm for travelling-wave-based protection of a double-circuit high-voltage line. It uses the balance between the two circuits to distinguish between an internal fault and an external disturbance. To prevent incorrect trips superimposed currents are used, and the relay has to be blocked after detecting an external disturbance. The sett... View full abstract»

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  • Steady-state analysis of parallel-operated self-excited induction generators

    Publication Year: 1993, Page(s):49 - 55
    Cited by:  Papers (16)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (524 KB)

    A mathematical model is presented that accurately predicts the steady-state performance characteristics of three-phase self-excited induction generators operating in parallel and supplying a balanced load. It is shown that it is possible to reduce the (n+1) nonlinear equations which are required in the steady-state analysis of an n machine system, to the solution of only two nonlinear equations. T... View full abstract»

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  • Harmonic elimination by DC ripple reinjection in generator-convertor units operating at variable speeds

    Publication Year: 1993, Page(s):57 - 64
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (546 KB)

    A method of increasing the pulse number of an HVDC power convertor based on the reinjection of the DC ripple is applied to a unit-connected generator-convertor scheme operating at variable speeds. Theoretical and experimental results are provided which demonstrate that, with the proposed modification, a single-bridge configuration can be made to operate as an 18-pulse power convertor for a wide ra... View full abstract»

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