Multi-parameter power transformer core inside local short-circuit fault monitoring method

Multi-parameter power transformer core inside local short-circuit fault monitoring method

  • CN 104,330,684 A
  • Filed: 10/31/2014
  • Published: 02/04/2015
  • Est. Priority Date: 10/31/2014
  • Status: Active Application
First Claim
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1. the inner partial short-circuit fault monitoring method of many reference amounts electrical transformer cores, it is characterized in that, described method comprises:

  • Step 1;

    the vibration signal gathering iron core when transformer runs, calculates the eigenvector distance d of described vibration signal nQ;

    Step 2;

    more described eigenvector distance d nQwith threshold k D q;

    If d nQ

    KD q, then transformer is normal;

    If d nQ>

    KD qand eigenvector distance d nQin fault signature vector distance interval, then perform step 3;

    Described D qfor the eigenvector distance of vibration signal described when transformer normally runs;

    Step 3;

    the gas composition in Transformer Oil Analysis, calculates the characteristic index value γ

    of described gas n;

    If described characteristic index value γ

    nwith the characteristic index value γ

    of gas during transformer fe core inner partial short-circuit fault fidentical, then transformer is short-circuited fault.

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