GATE Power Systems: Symmetrical components, Symmetrical and unsymmetrical fault analysis – Previous Year Questions
15 GATE previous year questions on Symmetrical components, Symmetrical and unsymmetrical fault analysis (Power Systems, Electrical Engineering) with answers and explanations, from every paper.
- GATE 2017 EE Q64 – The positive, negative, and zero sequence reactances of a wye-connected synchronous generator are 0.2 pu, 0.2 pu, and 0.1 pu, respectively. The…
- GATE 2015 EE Q54 – A sustained three-phase fault occurs in the power system shown in the figure. The current and voltage phasors during the fault (on a common…
- GATE 2016 EE Q30 – The magnitude of three-phase fault currents at buses A and B of a power system are 10 pu and 8 pu, respectively. Neglect all resistances in the system…
- GATE 2016 EE Q51 – A 30 MVA, 3-phase, 50 Hz, 13.8 kV, star-connected synchronous generator has positive, negative and zero sequence reactances, 15%, 15% and 5%…
- GATE 2018 EE Q30 – The series impedance matrix of a short three-phase transmission line in phase coordinates is bmatrixZ s&Z m&Z m\ m&Z s&Z m\ m&Z m&Z sbmatrix. If the…
- GATE 2018 EE Q31 – The positive, negative and zero sequence impedances of a 125 MVA, three-phase, 15.5 kV, star-grounded generator are j0.1 pu, j0.05 pu and j0.01 pu…
- GATE 2018 EE Q38 – The positive, negative and zero sequence impedances of a three phase generator are Z 1, Z 2 and Z 0 respectively. For a line-to-line fault with fault…
- GATE 2019 EE Q32 – Five alternators each rated 5 MVA, 13.2 kV with 25% of reactance on its own base are connected in parallel to a busbar. The short-circuit level in MVA…
- GATE 2019 EE Q60 – A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero sequence reactances of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The neutral…
- GATE 2021 EE Q46 – Suppose I A, I B and I C are a set of unbalanced current phasors in a three-phase system. The phase-B zero-sequence current I B0=0.10 p.u. If phase-A…
- GATE 2022 EE Q15 – The valid positive, negative and zero sequence impedances (in p.u.), respectively, for a 220 kV, fully transposed three-phase transmission line, from…
- GATE 2023 EE Q60 – The two-bus power system shown in figure (i) has one alternator supplying a synchronous motor load through a Y-Δ transformer. The positive, negative…
- GATE 2024 EE Q46 – For a two-phase network, the phase voltages V p and V q are to be expressed in terms of sequence voltages V and V as bmatrixV p\ qbmatrix= SbmatrixV \…
- GATE 2025 EE Q33 – The bus impedance matrix of a 3-bus system (in pu) is Z bus=bmatrixj0.059&j0.061&j0.038\0.061&j0.093&j0.066\0.038&j0.066&j0.110bmatrix A symmetrical…
- GATE 2026 EE Q19 – The initial three-phase voltage phasors ( V A, V B, and V C) at a bus of a power network are as shown in Case-1. Due to a disturbance, the bus voltage…