Problem4: A simple power system is shown in Fig. 2. A fault happens at bus 2. Duration of fault is greater than 0.06 sec

[answerhappygod]

Problem4 A Simple Power System Is Shown In Fig 2 A Fault Happens At Bus 2 Duration Of Fault Is Greater Than 0 06 Sec 1 (113.77 KiB) Viewed 21 times

Problem4: A simple power system is shown in Fig. 2. A fault happens at bus 2. Duration of fault is greater than 0.06 sec. Pre-fault internal voltage of generator has been shown on diagram. Find critical clearing time ter (corresponding to dcr). Assume H=3.1, Pm.pu=1.0 pu, Osync=21x60. Hint: you can use 8 (ter) Wsync XPm,pu tcra + So to convert load angle to critical time and vice versa. 2 4H o E'=12812/23.946 Vous=1.6L0° XL = 6.12 @ 3 1 X = 0.1 tú=0.3 Figure2. a simple power system for Problem4