GATE 2026 Electrical Engineering Q19

Question

The initial three-phase voltage phasors ($\bar{V}_A$, $\bar{V}_B$, and $\bar{V}_C$) at a bus of a power network are as shown in Case-1. Due to a disturbance, the bus voltage phasors changed in phase by a small angle $\Delta	heta$, and the magnitudes remained the same as depicted in Case-2.

Which one of the following statements is correct about the zero sequence components?

Accepted Answer

The zero sequence components in Case-1 and Case-2 have the same magnitude but different phase angles

Answer

The zero sequence components in Case-1 and Case-2 have the same phase angle and magnitude

Answer

The magnitude of the zero sequence component in Case-1 is greater than that in Case-2

Answer

The magnitude of the zero sequence component in Case-2 is greater than that in Case-1