Method and system of transformer protection and method and...

Details Method and system of transformer protection and method and... Method and system of transformer protection and method and...

H - Electricity

02

H

324/17, 317/7

H02H 7/04 (2006.01) G01R 31/06 (2006.01) H02H 7/045 (2006.01)

Patent

CA 2007833

A method and system of transformer protection in which parallel admittance currents indicative of the apparent excitation state of a transformer to be protected are evaluated from the transformer terminal voltages and currents sampled at a proper interval, and discrimination between an internal defect and excitation inrush is made in response to a magnitude of the parallel admittance current, and a breaker opening command is issued in response to a judgement of internal defect. The method and system enable high-accuracy and high- sensitivity fault detection through a simple computation.

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