FIELD: electricity.
SUBSTANCE: absolute maximum value is identified at each half-cycle of voltage curve, and residual resource is assessed by subtracting a part of resource from it, identified in each half-cycle of voltage curve as a ratio of duration of voltage half-period duration to value of permissible time of equipment insulation staying under voltage with maximum value of half-cycle. At the same time they measure electric voltage at evenly fixed moments of time, and counts of rectified signal are generated by detection of absolute values of measurements, counts of the rectified signal are compared with the specified threshold, and a section is identified, arranged between two counts below the threshold, and the counts of which are higher than the specified threshold, the count with the maximum value is found among counts of the identified section, and then they select the specified number of counts at the left and right from it. Via found counts they draw an interpolation curve with a single maximum, and its maximum is accepted as the absolute maximum value of electric voltage at the life-cycle.
EFFECT: increased accuracy of detection of residual resource of insulation.
2 cl, 1 dwg
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Authors
Dates
2014-08-20—Published
2013-02-08—Filed