MONITOR FOR SIGNAL QUALITY IN A PROTECTIVE RELAY SYSTEM

MONITOR FOR SIGNAL QUALITY IN A PROTECTIVE RELAY SYSTEM

A monitor for signal quality in and a protective relay system which utilizes both AC (AGC) and DC (GCV) signals from the receiver agc stage (42) to monitor a plurality of different signal parameters. A signal (VX) responsive to the noise in the communication channel (40) which transmits at least one...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: SUN, SHAN CHYI, MCGIVERN, JAMES PATRICK
Format: Patent
Sprache:eng
Schlagworte:
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
TRANSMISSION
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Beschreibung
Zusammenfassung:A monitor for signal quality in and a protective relay system which utilizes both AC (AGC) and DC (GCV) signals from the receiver agc stage (42) to monitor a plurality of different signal parameters. A signal (VX) responsive to the noise in the communication channel (40) which transmits at least one of the protective relay signals (VR) used in a protective relay comparison function (36 min ), is also used in the trip circuits (132) of the associated circuit interrupter (16) to continuously adapt or modify the trip level in response to channel noise.