Signal recovery method to increase the performance of digital relay protection

Abstract

This article is devoted to the issues of increasing the sensitivity and speed of digital relay protection. An algorithm for digital processing of a distorted current signal and restoration of an equivalent value according to the current value with the subsequent operation of the trigger body of digital relay protection was proposed. A practical experiment with the saturation of the current transformer (CT) magnetic system was carried out and proposed algorithm with a subsequent assessment of the sensitivity and potential speed was applied.