| 摘要 |
FIELD: power engineering, possible use in channel-forming relay protection equipment, using high voltage electric transfer lines. ^ SUBSTANCE: method is based on simultaneous transmission of high frequency signals from each one of opposite sides of protected part and their receipt, while frequency manipulation of high frequency signal is performed, frequency detection of high frequency signal and comparison of each semi-wave of received signal to thresholds, preliminarily set for each semi-wave. ^ EFFECT: increased resistance of transmission of signals of differential-phase protection to interference, possible simultaneous two-sided transmission of other signal types in narrow frequency spectrum. ^ 1 cl, 1 dwg |
