1.

The per-unit power output of a salient-pole generator which is connected to an infinite bus, is given by the expression, P = 1.4 sin δ + 0.15 sin 2δ, where δ is the load angle. Newton- Raphson method is used to calculate the value of δ for P = 0.8 pu. If the initial guess is 30°, then its value (in degree) at the end of the first iteration is

A. 15°
B. 28.48°
C. 28.74°
D. 31.20°
Answer» D. 31.20°


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