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    Systems and methods for dissolved gas analysis
    1.
    发明授权
    Systems and methods for dissolved gas analysis 有权

    公开(公告)号：US11867683B2

    公开(公告)日：2024-01-09

    申请号：US16804923

    申请日：2020-02-28

    申请人： Hitachi Energy Ltd

    发明人： Luiz Cheim

    IPC分类号： G01N33/28 ,  H01F27/12 ,  H01F27/40 ,  H02H7/04 ,  G01N21/3504

    CPC分类号： G01N33/2841 ,  G01N21/3504 ,  H01F27/12 ,  H01F27/402 ,  H02H7/04 ,  H01F2027/404

    摘要： A method of analyzing dissolved gas in an oil-filled transformer includes determining a centroid of a polygon that represents a plurality of dissolved gas concentrations. A fault region in which the centroid of the polygon is located is determined, where the plurality of fault regions are defined in a composite fault region map that is a composite of a Duval Pentagons 1 and 2. The method classifies a fault experienced by the transformer based on the determined fault region within the composite fault region map. The classification is done by a machine learning classification technique. Further embodiments classify faults based on dissolved gas levels without determining a centroid of a polygon representing the dissolved gas levels. Related systems are also disclosed.