Loop polarity diagnosis method based on relay protection current measurement

The invention discloses a loop polarity diagnosis method based on relay protection current measurement, provides a generalized transformation ratio concept for a relay protection measurement loop, and establishes a mathematical model for relay protection current measurement loop polarity diagnosis....

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	XIONG XIAOFU, WEI YAN, HUANG FEI, ZHONG JIAYONG, YU HONGXIN, WANG HONGBIN, ZENG XINGXING, CHEN XI, HE YAN, CHEN TAO, ZENG YONG, ZHANG YOUQIANG, OUYANG JINXIN, YAO SHUYOU
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING
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Beschreibung
Zusammenfassung:	The invention discloses a loop polarity diagnosis method based on relay protection current measurement, provides a generalized transformation ratio concept for a relay protection measurement loop, and establishes a mathematical model for relay protection current measurement loop polarity diagnosis. According to the method, criterion of current measurement loop polarity faults is provided based on singular value decomposition method, and the relay protection current measurement loop polarity diagnosis method based on the generalized transformation ratio is established. The provided diagnosis method has the advantages that not only can influence of total measuring errors be eliminated, but also the problem about polarity judgment of low-current branch can be solved, and higher sensitivity is provided.