Question #5
1
j0.1
j0.1
1?0
?
G?
j0.4
B?
S? = 2 + j1
j0.1
j0.1
Fault
B?
G?
j0.4
Fig. 6
2
S? = 2.5 + j1.2
For the system shown in Fig. 6, assume $V_1 = 1.05 \angle 15^\circ$, and $V_2 = 1.04 \angle 12^\circ$ before fault,
i) Determine the internal voltages $E_1$ and $E_2$ of $G_1$ and $G_2$, respectively, before
the fault occurs.
ii) Determine the initial rotor angles $\delta_{01}$ and $\delta_{02}$ of $G_1$ and $G_2$ respectively, before
the fault occurs..
iii) Determine the mechanical powers $P_{m1}$ and $P_{m2}$ of $G_1$ and $G_2$, respectively.
iv) Determine the equation of the electrical powers $P_{e1}$ and $P_{e2}$ of $G_1$ and $G_2$,
respectively, during fault.
v) Calculate $\delta_2$ at $t = 0.2$ second during fault.
vi) Determine the equation of the electrical powers $P_{e1}$ and $P_{e2}$ of $G_1$ and $G_2$,
respectively after clearing fault.
Question #6
