FIELD: electric power.
SUBSTANCE: invention relates to the field of electric power. According to the invention, each half-set of protection includes a module for detecting the transition of asymmetric damage to symmetric, as well as a pulse time element, which forms a blocking pulse to a high-frequency transmitter during the transient process in the measuring circuits of the half-sets of protection. The transmitter output, acting according to the "OR" scheme with a signal from the manipulation organ by filling the high-frequency channel with a continuous signal, affects the blocking of all semi-sets of phase differential protection of the line.
EFFECT: invention improves reliability of the functioning of the phase-differential protection in the modes of transition of external asymmetric faults to symmetrical.
1 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PROTECTION OF POWER TRANSMISSION LINES IN CASE OF UNSUCCESSFUL SINGLE-PHASE RE-ACTIVATION | 2020 |
|
RU2751541C1 |
| METHOD FOR ENSURING THE SELECTIVITY OF HIGH-FREQUENCY PROTECTION OF POWER TRANSMISSION LINES UPON SUCCESSFUL RECLOSING | 2021 |
|
RU2780734C1 |
| METHOD OF PROTECTION OF POWER LINE FROM MAGNETIZING CURRENT SURGES AT POWER TRANSFORMER | 2022 |
|
RU2792285C1 |
| PHASE DIFFERENTIAL PROTECTION METHOD OF POWER TRANSMISSION LINES | 2012 |
|
RU2508586C1 |
| METHOD FOR PHASE-COMPARISON PROTECTION OF POWER TRANSMISSION LINE | 2003 |
|
RU2237331C1 |
| METHOD OF PROTECTING POWER TRANSMISSION LINES WITH RENEWABLE ENERGY SOURCES | 2020 |
|
RU2735949C1 |
| PHASE-COMPARISON CARRIER-CURRENT PROTECTION | 0 |
|
SU1636917A1 |
| HIGH-FREQUENCY DIRECTIONAL PHASE-COMPARISON PROTECTIVE GEAR FOR POWER TRANSMISSION LINE | 1987 |
|
RU1602343C |
| METHOD OF TRANSMITTING AND RECEIVING RELAY PROTECTION SIGNALS AND UNIVERSAL DEVICE FOR IMPLEMENTATION THEREOF | 2015 |
|
RU2598037C1 |
| METHOD OF CONTINUOUS AUTOMATIC TESTING OF HIGH-FREQUENCY CHANNEL OF RELAY PROTECTION | 1991 |
|
RU2024146C1 |
