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Generation, Transmission and Distribution, IEE Proceedings C

Issue 5 • Date September 1982

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Displaying Results 1 - 7 of 7
  • Long-term optimal operation of a power system

    Publication Year: 1982 , Page(s): 185 - 191
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (843 KB)  

    An algorithm for the most economic operation of a hydrothermal power system, over a one year time span, is described. The algorithm handles hydro storage reservoirs, thermal power stations, AC transmission system losses, and major operating constraints, including a DC Link. A nonlinear programming solution technique, involving a conjugate-gradients method, is used. As an example, a solution is obt... View full abstract»

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  • Dynamic state estimation including anomaly detection and identification for power systems

    Publication Year: 1982 , Page(s): 192 - 198
    Cited by:  Papers (4)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (859 KB)  

    A novel method for detecting and identifying three fundamental anomalies, i.e. occurrence of bad data, changes in network configuration and sudden variation of states, in dynamic state estimation for electric power systems is proposed. Examination of innovation processes in the Kalman filter is appropriately used in each step of the detection of anomalies, discrimination between anomalies and appl... View full abstract»

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  • Phase-to-phase switching surges on 500 kV unloaded transmission line

    Publication Year: 1982 , Page(s): 199 - 205
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (735 KB)  

    With the use of a digital computer, a comprehensive study of phase-to-phase switching surges on 500 kV unloaded transmission line were studied. Investigations have been carried out on the distribution of phase-to-phase overvoltages and the corresponding time-to-crest values during line energisation and re-energisation. Switching-surge control, using preinsertion resistors and shunt compensation an... View full abstract»

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  • Twelve-pulse back-to-back AC/DC conversion for reactive-power control

    Publication Year: 1982 , Page(s): 206 - 212
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (805 KB)  

    As an alternative to existing thyristor-controlled compensators, the paper proposes the use of static AC/DC power convertors for the control of reactive power. A double-bridge convertor scheme, with the two bridges operating back-to-back, is used to investigate the optimal operating conditions with respect to fundamental power and harmonic distortion. The results indicate that it is possible to ma... View full abstract»

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  • Sag and tension calculations for mountainous terrain

    Publication Year: 1982 , Page(s): 213 - 220
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (862 KB)  

    While normal sag and tension calculations based on the `equivalent-span¿¿ concept are satisfactory, when applied to transmission lines located in a reasonably undulating terrain, the answers obtained by this method are inaccurate for mountainous terrain. An alternative method of calculation, which is based on the analysis of the change of state equation for each span of a section in turn, is given... View full abstract»

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  • Radio interference on DC lines from HVDC convertor stations

    Publication Year: 1982 , Page(s): 221 - 227
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (722 KB)  

    An assessment has been made of the RF power generated by a modern thyristor-valve convertor station and injected onto a DC transmission line. The total AC power and the power spectrum have been determined for each pole. At a 400 MW (0.4 p.u.) load on the Dickinson, Minnesota, station the RF power per pole launched on the DC system is of the order of 100W for the 10 kHz¿¿30 kHz range and 20W above ... View full abstract»

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  • Drying of power-transformer insulation

    Publication Year: 1982 , Page(s): 228 - 232
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (689 KB)  

    To ensure that large high-voltage power transformers will operate reliably for years without requiring unscheduled maintenance, manufacturers thoroughly dry the insulation after manufacture and before commissioning. Using conventional monitoring procedures, it is difficult to establish the residual moisture concentration throughout the insulation. The paper introduces a computational technique whi... View full abstract»

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