The figure shows the single line diagram of a single machine infinite bus system.The inertia constant of the synchronous generator H=5 MW-s/MVA.Frequency is 50 Hz. Mechanical power is 1 p.u. The system is operating at stable quilibrium point with rotor angle δ=30∘. A three phase short circuit fault occurs at a certain location on one of the circuits of the double circuit transmission line. During fault, electrical power in p.u. is 0.23sinδ. If the value of δ at the instant of fault clearing is 45∘ then,dδdt=_____radians/sec.3.76

The figure shows the single line diagram of a single machine infinite

1.	The figure shows the single line diagram of a single machine infinite bus system.The inertia constant of the synchronous generator H=5 MW-s/MVA.Frequency is 50 Hz. Mechanical power is 1 p.u. The system is operating at stable quilibrium point with rotor angle δ=30∘. A three phase short circuit fault occurs at a certain location on one of the circuits of the double circuit transmission line. During fault, electrical power in p.u. is 0.23sinδ. If the value of δ at the instant of fault clearing is 45∘ then,dδdt=_____radians/sec.3.76
Answer» The figure shows the single line diagram of a single machine infinite bus system. The inertia constant of the synchronous generator H=5 MW-s/MVA. Frequency is 50 Hz. Mechanical power is 1 p.u. The system is operating at stable quilibrium point with rotor angle $δ = 30^{\circ}$ . A three phase short circuit fault occurs at a certain location on one of the circuits of the double circuit transmission line. During fault, electrical power in p.u. is $0.23 sin δ$ . If the value of $δ$ at the instant of fault clearing is $45^{\circ} t h e n, \frac{d δ}{d t} =$ _____radians/sec. 3.76