FIELD: power engineering.
SUBSTANCE: invention relates to electric power engineering in high-frequency protection of power transmission lines with phase-by-phase control of switches. To protect the line, a combined relay of the reverse sequence current and its emergency component is used. The parameters of relay operation are calculated from the signal of a single-phase automatic re-activation by the currents of the previous incomplete-phase mode. The parameters are adaptively entered into the current relay as setpoints to protect the line in the event of unsuccessful single-phase automatic re-activation of the disconnected phase.
EFFECT: ensuring the speed of switching off the power line in case of unsuccessful single-phase automatic re-activation.
1 cl, 1 dwg
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|---|---|---|---|
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|
RU2780734C1 |
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|
SU1697166A1 |
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|
SU794680A1 |
| 0 |
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SU194922A1 | |
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SU1647738A1 |
| HIGH-FREQUENCY DIRECTIONAL PHASE-COMPARISON PROTECTIVE GEAR FOR POWER TRANSMISSION LINE | 1987 |
|
RU1602343C |
| DEVICE FOR PROTECTING THREE-PHASE POWER TRANSMISSION LINE | 1994 |
|
RU2081492C1 |
| 0 |
|
SU432626A1 |
