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IEE Proceedings C - Generation, Transmission and Distribution

Issue 6 • Date November 1983

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Displaying Results 1 - 7 of 7
  • Currents flowing in the stator-core frames of large electricalmachines

    Publication Year: 1983, Page(s):273 - 277
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (653 KB)

    The stator cores of large electrical machines are supported in a steel frame in which electrical currents are circulated by leakage flux from the core. These currents can cause serious overheating. The paper gives a qualitative review of the electromagnetic factors which affect the flowof these frame currents. The work shows that the effects of frame currents may be reduced if the frame members ar... View full abstract»

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  • Modal propagation and sensitivity of modal quantities in crossbonded cables

    Publication Year: 1983, Page(s):278 - 284
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (748 KB)

    In the paper, sensitivity studies, described by the authors in an earlier paper (`Sensitivity analysis of modal quantities for underground cables¿¿, IEE Proc. C., Gen., Trans. & Distrib.,1981,128,(4), pp.229¿¿234 for a homogeneous noncrossbonded cable system, have been extended to the case of the crossbonded cable. For the crossbonded case, the minor sections are represented by lumped paramete... View full abstract»

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  • General computational method for performing availability analysis of power-system configurations

    Publication Year: 1983, Page(s):285 - 294
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1081 KB)

    The paper presents a general computational method and the relevant computer program which can be easily used to perform availability/unavailability analysis on power-system configurations. The mathematical availability formulation of the program is based primarily on: the tie sets (or cut sets) of the system configuration, the component failure rates and repair and maintenance times, some aspects ... View full abstract»

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  • New approach for real power loss minimisation

    Publication Year: 1983, Page(s):295 - 299
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (477 KB)

    The paper presents a new approach to the minimisation of line losses in a given power-system network by means of certain sensitivity coefficients. These coefficients are used to see how sensitive is the line loss for small changes in the control variables, i.e. voltage magnitudes of the generators, reactive-power injections by VAR sources and transformer tap ratios. These sensitivity coefficients ... View full abstract»

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  • Harmonic reduction in the static VAR compensator by sequence control of transformer taps

    Publication Year: 1983, Page(s):300 - 305
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (595 KB)

    Owing to discontinuous current in a thyristor-controlled reactor (TCR) of a static VAR compensator, harmonic currents are generated in the supply system. The paper presents a new method for reducing these harmonics. In the method used, the TCR is fed through the sequentially controlled transformer taps. Two alternative approaches of sequence control of transformer taps are described. The feasibili... View full abstract»

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  • Microprocessor-based algorithm for high-resistance earth-fault distance a protection

    Publication Year: 1983, Page(s):306 - 310
    Cited by:  Papers (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (599 KB)

    A new method for high-resistance earth-fault distance protection, capable of calculating fault distance independent of fault resistance, is presented with an accuracy analysis which shows that calculation accuracy, which depends on various application parameters, may be uniquely established by a measurable index. Relay overreach is avoided by reference to the index. Conclusions aredrawn from resul... View full abstract»

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  • Accurate fault impedance locating algorithm

    Publication Year: 1983, Page(s):311 - 314
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (479 KB)

    Fault resistances affect the accuracy of short-circuit location, when distance to the fault is determined by means of measuring reactance at one end of the transmission line. This is because the current which flows through the fault resistance is slightly shifted in phase with respect to the current measured at the end of the line in question, due to the effect of the prefault load current. As a r... View full abstract»

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