H - Electricity – 02 – H
Patent
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.
Inagaki Keizo
Maeda Takafumi
Matsui Yoshiaki
Sano Yoshihiro
Hitachi Ltd.
Inagaki Keizo
Kirby Eades Gale Baker
Maeda Takafumi
Matsui Yoshiaki
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