Distribution transformer capacity sequence grade optimizing method

Distribution transformer capacity sequence grade optimizing method

  • CN 101,741,097 A
  • Filed: 12/29/2009
  • Published: 06/16/2010
  • Est. Priority Date: 12/29/2009
  • Status: Active Grant
First Claim
Patent Images

1. distribution transformer capacity sequence grade optimizing method is characterized in that:

  • Under each average load rate of same load, close capacitance grade sequence is optimized, be optimized calculating according to following formula;

    &

    beta;

    ik
    =SnSi&

    times;

    &

    beta;

    nk
    (k=1 wherein, 2,3 ...) (1) P ik

    AVERAGE[P 0i+K tβ

    ik2P ki+C(Q 0i+K tβ

    ik2Q ki)]????????????????????(2) In formula (1) and (2);

    S nThe reference capacity of selecting in-the grouping;

    S iI in-the grouping is waited level capacity;

    β

    Ik-distribution transformer capacity is S iThe time relative datum capacity S nConversion load factor under each load factor;

    β

    Nk-distribution transformer capacity reference capacity S nThe time load factor;

    P IkAverage load rate β

    in the combination of-distribution transformer capacity sequence NkUnder the average composite loss of transformer;

    P 0i-distribution transformer capacity is S iSpecified unloaded active loss, unit is;

    kW;

    K t-fluctuation of load loss factor generally gets 1.05;

    P Ki-distribution transformer capacity is S iThe nominal load active loss, unit is;

    kW;

    Q Ki-distribution transformer capacity is S iSpecified unloaded reactive loss, unit is;

    kvar;

    C-is idle economic equivalent, kW/kvar;

    Idle herein economy is when measuring 0.1;

    Distribution transformer at certain model carries out the capacitance grade sequence optimisation, at first should begin grouping from the minimum capacity grade according to the rated capacity of relevant existing standard defined and calculate;

    The grouping minimum capacity grade in the normal capacity sequence exactly begins, general 4~

    6 is one group, if find in calculating that flex point does not appear in the average composite loss curve of heap(ed) capacity grade in grouping yet, can continue to increase the capacitance grade number in the grouping.Concrete computational methods can be decomposed (2) formula;

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