a- Explain why it is important to provide enough reactive power throughout an electric power system. List the major sources of reactive power in the system. b- A salient pole synchronous machine is connected to an infinite bus whose voltage is kept constant at 1.00 pu. The direct and quadrature axis reactances of the machine are 0.6 and 0.3 pu respectively. The table given below relates to three operating conditions of the machine. (Q: is the reactive power at machine terminals) Complete the table neglecting armature reaction. E 2.05 45° 47° ? Condition A Condition B Condition C 1.27 0.0 1.35

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Problem 2
a- Explain why it is important to provide enough reactive power throughout an electric power system. List the
major sources of reactive power in the system.
b- A salient pole synchronous machine is connected to an infinite bus whose voltage is kept constant at 1.00 pu.
The direct and quadrature axis reactances of the machine are 0.6 and 0.3 pu respectively. The table given below
relates to three operating conditions of the machine. (Q2 is the reactive power at machine terminals) Complete
the table neglecting armature reaction..
Q2
Condition A
2.05
?
45°
1.27
47°
Condition B
Condition C
0.0
1.35
Transcribed Image Text:Problem 2 a- Explain why it is important to provide enough reactive power throughout an electric power system. List the major sources of reactive power in the system. b- A salient pole synchronous machine is connected to an infinite bus whose voltage is kept constant at 1.00 pu. The direct and quadrature axis reactances of the machine are 0.6 and 0.3 pu respectively. The table given below relates to three operating conditions of the machine. (Q2 is the reactive power at machine terminals) Complete the table neglecting armature reaction.. Q2 Condition A 2.05 ? 45° 1.27 47° Condition B Condition C 0.0 1.35
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