Surge impedance loading

Definition according to Cigre TB 531 chap. 4.2.5

The surge impedance loading, or natural loading, is the power loading at which reactive power is neither produced nor absorbed.

Symbol
$SIL$
Unit
MW
Formulas
$\frac{{U_n}^2}{Z_{ch}}$nominal voltage
$\frac{{U_o}^2}{Z_{ch}}$operating voltage
Related
$Z_{ch}$
Surge impedance [$\Omega$]