Transformer differential protection

摘要: Transformer differential protection is provided by measuring a plurality of currents corresponding to first set windings and second transformer, compensating the based on their respective flows through either or windings. The compensated may be intentionally augmented compensate for magnetizing inrush and/or stationary overexcitation conditions associated with transformer. Augmentation overexcitation, example, harmonic restraint an addition V/Hz ratio restraining signal. A complex current calculated currents. two-terminal equivalent power apparatus. Then, alpha plane analysis applied ratio. Based analysis, apparatus that includes transformer selectively tripped.