6.6. Using the method of nodal analysis, determine I a, I b, and I c in the following unbalanced system, where
p
U sa ˆ
U sb ˆ
U sc ˆ
2 ? 220 V€0°
p2 ? 210 V€- 120° p2 ? 215 V€115°
Z ˆ 1 ‡ 3j ?; Z a ˆ 20 ?; Z b ˆ 5 ‡ 25j ?; Z c ˆ 30 – 8j ?
Then calculate the current I NO ?owing in a resistor R ˆ 10 ?, positioned between O and N (use Thévenin’s theorem).
O N