METHOD AND DEVICE FOR MONITORING A TRANSFORMER STATE

The invention relates to a method and a device for monitoring a transformer (1) state, in particular for monitoring at least one turns ratio of the transformer (1). A real winding current (l1, I2, l3, l4, l5) of at least one winding to be monitored, a real winding current change of the at least one...

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Bibliographic Details
Main Authors FAVEZ, JEAN-YVES, VRTEK, JURAJ, PENDHARKAR, ISHAN, STIEGELER, ROLAND
Format Patent
LanguageEnglish
French
German
Published 16.09.2015
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:The invention relates to a method and a device for monitoring a transformer (1) state, in particular for monitoring at least one turns ratio of the transformer (1). A real winding current (l1, I2, l3, l4, l5) of at least one winding to be monitored, a real winding current change of the at least one winding to be monitored, and a real winding voltage (U1, U2, U3, U4, U5) of the at least one winding to be monitored are determined, at least one transformer (1) parameter to be monitored being determined. The invention is characterized in that at least one magnetic coupling coefficient is determined as the parameter to be monitored dependent on a dynamic current/voltage model of the transformer (1), said coupling coefficient describing a magnetic coupling between the winding to be monitored and at least one additional winding of the transformer (1), and the monitoring process is carried out dependent on the at least one magnetic coupling coefficient.
Bibliography:Application Number: EP20130789281