ABB Switzerland Ltd REG 316*4 1MRB520049-Uen / Rev. F
3-266
Fig. 3.5.26.1 Locus of the impedance measured at the gen-
erator terminals during pole slipping in relation to
the power system A
X
d
' : transient reactance of the generator
X
T
: short-circuit reactance of the step-up transformer
Z
S
: transient impedance of the power system A
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