Secure distance protection of electric power delivery systems under transient conditions

A secure distance protection for electric power delivery systems under transient conditions is disclosed herein. Upon detection of a transient condition, additional security is added to a distance protection element before a protective action is taken. The transient condition may be detected when an...

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Bibliographische Detailangaben
Hauptverfasser:	Kasztenny, Bogdan Z, Daniels, Chadburn Troy
Format:	Patent
Sprache:	eng
Schlagworte:	CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	A secure distance protection for electric power delivery systems under transient conditions is disclosed herein. Upon detection of a transient condition, additional security is added to a distance protection element before a protective action is taken. The transient condition may be detected when an angle of advancement of an operating signal is outside of a predetermined threshold. An unsecure condition may also be detected before applying additional security. The unsecure condition may be detected based on an estimation of a fault within a close-in zone and a voltage magnitude falling below a threshold.