6.36 The bus admittance matrix of a three-bus power system is given by

7 -2 -5

6-4 per unit

-5 -4 9

Ybus = -j-2

with V/₁ = 1.0/0° per unit; V₂ = 1.0 per unit; P₂ = 60 MW; P3 = -80 MW; Q3 = -60

MVAR (lagging) as a part of the power-flow solution of the system, find V/₂ and V3

within a tolerance of 0.01 per unit, by using Gauss-Seidel iteration method. Start with

62 = 0, V3 = 1.0 per unit, and 83 = 0.