Statistical pattern analysis methods of partial discharge measurements in high voltage insulation
AssigneeGeneral Electric Company
InventorsBirsen Yazici, John Raymond Krahn
Life of this patent
Estimating the term…
Abstract
Statistical methods of partial discharge analysis utilizing histogram similarity measures are provided by quality assessment and condition monitoring methods of evaluating high voltage electrical insulation. The quality assessment method is utilized to evaluate the quality of insulation within the electrical equipment. The condition monitoring method is utilized during normal operation of the equipment to identify degradation in the insulation and to predict catastrophic insulation failures.
Claims10
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.
Dependencies are inferred from the claim text.