FIELD: relay protection, concerning digital processing of input values, may be applied to launching organs, modules for restoration of non-linearly distorted current, selectors of energy object modes.
SUBSTANCE: in the method, homogeneity interval determining (segmentation) is realized on basis of digital filter of orthogonal components. Only two counts are utilized for each component. Of a set of these four counts two signals are formed, one in form of sum of squares of all counts, and other one - double result of multiplication of counts of the same name. Activation characteristic of executive relay is positioned within narrow sector adjacent to bisecting line of first quadrant of plane of two formed signals. Method was tested on digital oscilloscope patterns of real processes, recorded in electric systems. An example is given for processing of short circuit current, distorted as a result of saturation of measuring transformer.
EFFECT: simplified method for determining homogeneity intervals of an electric value.
5 dwg
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