DETERMINATION OF THE NECESSARY TRANSFORMING CAPACITY GIVEN A RANDOM CHARACTER OF THE LOAD CURVE

OPREDELENIE NEOBKHODIMOI TRANSFORMATORNOI MOSHCHNOSTI PRI SLUCHAINOM KHARAKTERE GRAFIKA NAGRUZKI

The power of transformers supplying whatever load will be determined correctly if the relative wear and tear of the insulation of the winding for the entire economically feasible service period of the transformers turns out to be equal to a unit. In order to calculate the transformational power, graphs of the load capability can be utilized. In addition to this it is necessary to have a stable round-the-clock graph of the load transformed into an equivalent rectangular load. However in a number of branches of the national economy, random operating regimens of consumers are encountered. The task for solving transformational power when examining the load as a random process leads to finding a mathematical expectation for the intensity relative to the wear and tear of the winding insulation. This can most accurately be accomplished by the probability modeling of the load schedule. The mathematical expectation of the intensity relative to the wear and tear can more simply and with sufficient accuracy be found on the basis of statistical characteristics of the temperature of the winding. The article concludes that the essential difference in the values of the permanent times of the winding and the oil, and the correlation times of the load, permit the proposition of sufficiently simple formulas for the definition of statistical temperature characteristics of the winding, which can in turn be utilized for finding the relative wear and tear of the insulation and calculating the necessary transformational power. The formulas obtained on the basis of the theories of random fixed functions are not connected to the type of correlational functions and the law of load distribution.

  • Supplemental Notes:
    • Abstract only is available in English, original untranslated as of November 1976.
  • Corporate Authors:

    Pergamon Press, Incorporated

    Maxwell House, Fairview Park
    Elmsford, NY  USA  10523
  • Authors:
    • Markvardt, G G
    • Ter-Oganov, E V
  • Publication Date: 1973

Language

  • Russian

Media Info

  • Features: References;
  • Pagination: p. 46-49
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00130294
  • Record Type: Publication
  • Source Agency: Federal Railroad Administration
  • Files: TRIS, USDOT
  • Created Date: Nov 23 1977 12:00AM