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
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PROTECTING POWER TRANSMISSION LINE | 2014 |
|
RU2585005C1 |
| METHOD FOR TRANSMITTING AND RECEIVING INSTRUCTIONS OVER COMMUNICATION CHANNEL | 2004 |
|
RU2285336C2 |
| METHOD OF TRANSMITTING AND RECEIVING RELAY PROTECTION SIGNALS AND UNIVERSAL DEVICE FOR IMPLEMENTATION THEREOF | 2015 |
|
RU2598037C1 |
| ARITHMETIC UNIT FOR PERFORMING DISCRETE FOULER TRANSFORM | 1991 |
|
RU2015550C1 |
| METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING RELAY PROTECTIVE GEAR SIGNALS | 2004 |
|
RU2272348C1 |
| METHOD FOR DIFFERENTIAL-PHASE PROTECTION OF POWER LINES | 2021 |
|
RU2752848C1 |
| DETECTION METHOD AND APPARATUS | 2012 |
|
RU2506631C1 |
| METHOD TO REMELT METAL IN VACUUM ELECTRIC ARC FURNACE | 2012 |
|
RU2516325C2 |
| METHOD FOR PHASE-COMPARISON PROTECTION OF POWER TRANSMISSION LINE | 2003 |
|
RU2237331C1 |
| PHASE DIFFERENTIAL PROTECTION METHOD OF POWER TRANSMISSION LINES | 2012 |
|
RU2508586C1 |
