CONTROL OF OPERATION OF PROTECTION RELAY

A method of controlling a protection relay, includes inputting an input characteristic quantity and determining a triggering condition for the protection relay using a calculation equation, the value of which increases when the input characteristic quantity exceeds a first threshold value, and decre...

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Bibliographische Detailangaben
Hauptverfasser:	VANHALA, Kari, YLINEN, Juha
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	A method of controlling a protection relay, includes inputting an input characteristic quantity and determining a triggering condition for the protection relay using a calculation equation, the value of which increases when the input characteristic quantity exceeds a first threshold value, and decreases when the input characteristic quantity undershoots a second threshold value for an overfunction measure, and the value of the calculation equation increases when the input characteristic quantity undershoots a first threshold value, and decreases when the input characteristic quantity exceeds a second threshold value for an under function measure, wherein the calculation equation includes a first measure and a second measure, and the triggering occurs when the first measure is greater than the second measure.