GATE 2022 : Power System Quiz 4

The voltage at the point of commencement of supply shall not vary by more than

A 50 Hz, 2 pole turbo generator rated 100 MVA, 33 kV has an inertia constant of 4 MJ/MVA. If the mechanical input is suddenly raised to 70 MW for an electrical load of 40 MW, then the rotor acceleration is

A synchronous machine rated 50 MW, 50 Hz has a rated load of 40 MW. Load varies by 1% for 1% change in frequency. The load frequency constant parameter in pu MW/Hz is

A synchronous generator operating at 50 Hz is connected to an infinite bus through a transmission line. The pu reactance of the generator and the line are j0.5 pu & j0.4 pu respectively. The generator no load voltage is 1.3 pu & infinite bus voltage is 1.0 pu. The inertia constant of the generator is 5 MJ/MVA . If the generator is loaded to 80% of its maximum power transfer capacity and a small disturbance is given, then natural frequency of oscillation is _________rad/sec.

A 400 V lossless long transmission line has the following A, B, C, D constants. A = D = 1∠0°, B = 60∠90° Ω/phase, C = 12 × 10^–4 ∠90° S/phase. Calculate SIL in kW