Assignment(1) The single line diagram of a three phase power system is shown in Fig.(2). The motor draws 15MW at 0.85 power factor leading at 13.7 kV terminal voltage. The data of the system elements are given as follows: G: 30 MVA, 13.2kV, X=0.1p.u. M: 20 MVA, 14kV, X-0.08 p.u. Load 2:5+j2 MVA T: 20 MVA, 13.8/138KV,X-0.1 р.и. T: 20 MVA, 13.2/132KV.X-0.12 р.u. Line: (20+j100) Q 1. Draw an impedance diagram showing all impedances in per unit. Select a base power of 50 MVA and a base of 15kV in the motor zone 2. Find the terminal voltage of the generator. T1 T2 2 1 Transmission line Fig. (2) M Load 2 3. Find the fault current when a symmetrical 3-phase fault occurs at the midpoint of the transmission line. T1 T2 2 1 Transmission line (м Load 2 3-ph fault

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ISBN:9780133923605
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Publisher:Robert L. Boylestad
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Assignment(1)
The single line diagram of a three phase power system is shown in Fig.(2). The motor draws 15MW
at 0.85 power factor leading at 13.7 kV terminal voltage. The data of the system elements are given as
follows:
G: 30 MVA, 13.2kV, X=0.1p.u.
M: 20 MVA, 14kV, X-0.08 p.u.
Load 2:5+j2 MVA
T: 20 MVA, 13.8/138KV,X-0.1 р.и.
T: 20 MVA, 13.2/132KV.X-0.12 р.u.
Line: (20+j100) Q
1. Draw an impedance diagram showing all impedances in per unit. Select a base power of 50
MVA and a base of 15kV in the motor zone
2. Find the terminal voltage of the generator.
2
T1
1
Transmission line
Fig. (2)
M
Load 2
3. Find the fault current when a symmetrical 3-phase fault occurs at the midpoint of the
transmission line.
T1
T2
2
1
Transmission line
(M
Load 2
3-ph fault
E mm
Transcribed Image Text:Assignment(1) The single line diagram of a three phase power system is shown in Fig.(2). The motor draws 15MW at 0.85 power factor leading at 13.7 kV terminal voltage. The data of the system elements are given as follows: G: 30 MVA, 13.2kV, X=0.1p.u. M: 20 MVA, 14kV, X-0.08 p.u. Load 2:5+j2 MVA T: 20 MVA, 13.8/138KV,X-0.1 р.и. T: 20 MVA, 13.2/132KV.X-0.12 р.u. Line: (20+j100) Q 1. Draw an impedance diagram showing all impedances in per unit. Select a base power of 50 MVA and a base of 15kV in the motor zone 2. Find the terminal voltage of the generator. 2 T1 1 Transmission line Fig. (2) M Load 2 3. Find the fault current when a symmetrical 3-phase fault occurs at the midpoint of the transmission line. T1 T2 2 1 Transmission line (M Load 2 3-ph fault E mm
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