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Influence of Reflected Signals and Propagation Time of High-Frequency Signals on the Operation of the Differential-Phase Protection

The paper considers the time domain influence of high-frequency signals propagation along high-voltage lines and the influence of reflected signals on the differential-phase protection operation. The features of the logical signal formation and manipulation characteristics are considered. The time compensation method of high-frequency signals propagation and influence exclusion calculation of the reflected signals on differential-phase protection operation is given. The experimental studies results of two half-sets differential-phase protection on the equivalent of communication line are presented.