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Statistical pattern analysis methods of partial discharge measurements in high voltage insulation

  • US 6,192,317 B1
  • Filed: 03/06/2000
  • Issued: 02/20/2001
  • Est. Priority Date: 04/11/1997
  • Status: Expired due to Fees
First Claim
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1. A statistical method of condition monitoring the insulation in high voltage equipment utilizing partial discharge measurements, comprising the following steps:

  • calculating at least one analysis feature of undetermined insulation based on a plurality of partial discharge measurements;

    estimating trend parameters of said at least one analysis feature based on a linear trend line generated based on a plurality of previously determined ones of said analysis feature;

    predicting an estimated analysis feature statistical distance of said analysis feature with respect to said trend line;

    comparing said predicted analysis feature statistical distance with an actual analysis feature statistical distance so as to determine whether the condition of said undetermined insulation has changed.

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