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Electrical Engineering Virtual Power Lab Experiments

Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Determination of Sub-Transient Reactance (Xd″), Transient Reactance (Xd′), and Steady-State Reactance (Xd) of a Synchronous Machine

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1. The value of X_d'' for 2 pole Turbo alternator in the range of:

a: 0.07 to 0.12 Explanation

Explanation

b: 0.1 to 0.5 Explanation

Explanation

c: 1 to 5 Explanation

Explanation

d: 0.7 to 1.8 Explanation

Explanation

2. The value of X_d'' for water wheel alternators in the range of:

a: 0.1 to 0.35 Explanation

Explanation

b: 1 to 3.5 Explanation

Explanation

c: 0.07 to 0.12 Explanation

Explanation

d: 0.7 to 1.2 Explanation

Explanation

3. Which statement is correct just after fault:

a: X_d'' = X_d' = X_d Explanation

Explanation

b: X_d'' < X_d' < X_d Explanation

Explanation

c: X_d'' > X_d' > X_d Explanation

Explanation

d: None of these Explanation

Explanation

4. The reactances of a synchronous machine depend upon:

a: Applied Voltage Explanation

Explanation

b: Leakage flux Explanation

Explanation

c: Degree of saturation of magnetic core Explanation

Explanation

d: Power factor of supply current Explanation

Explanation

5. Line to line fault in a transmission line is a:

a: Symmetrical fault Explanation

Explanation

b: Unsymmetrical fault Explanation

Explanation

c: Somewhat symmetrical Explanation

Explanation

d: Somewhat unsymmetrical Explanation

Explanation

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