Quadrature-axis subtransient short-circuit time constant

Quadrature-axis subtransient short-circuit time constant

 

 

Quadrature-axis subtransient short-circuit time constant

 

Meaning of Quadrature-axis subtransient short-circuit time constant

Quadrature-axis subtransient short-circuit time constant a constant that characterizes the initial decay of transients in the q-axis variables of the synchronous machine with the stator windings short-circuited. The interval characterized is that immediately following a disturbance, during which the effects of all amortisseur windings are considered. A detailed (derived) closed-form expression for the subtransient short-circuit time constant of a machine with two q-axis amortisseur windings is obtained by taking the reciprocal of the largest root of the numerator of the q-axis operational impedance. An approximate (standard) value is often used, in which it is assumed one amortisseur winding resistance is small relative to the other and the detailed expression simplified.

 

Source: http://ee.sharif.edu/~lcsl/useful/Electrical%20Engineering%20Dictionary.pdf

Web site to visit: http://ee.sharif.edu

Author of the text: Ed. P.A. Laplante Boca Raton: CRC Press LLC, 2000

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Quadrature-axis subtransient short-circuit time constant

 

Quadrature-axis subtransient short-circuit time constant

 

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Quadrature-axis subtransient short-circuit time constant

 

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Quadrature-axis subtransient short-circuit time constant