engineering recuitment GATE EE 2023-24 Test Series Power Systems PU System and Symmetrical Components Symmetrical Components
Suppose IA, IB and IC are a set of unbalanced current phasors in a three-phase system. The phase-B zero-sequence current IB0 = 0.1 ∠0° p.u. If phase-A current IA = 1.1 ∠0° p.u. and phase-C current IC = (1 ∠120° + 0.1) p.u. then IB in p.u. is
1
1 ∠240° - 0.1 ∠0°
2
1.1 ∠240° - 0.1 ∠0°
3
1.1 ∠-120° + 0.1 ∠0°
4
1 ∠-120° + 0.1 ∠0°