Representation of Power System Components Interview Questions:
Following are the below Representation of Power System Components Interview Questions and Important Questions which is very useful for interviews and exams
1. Draw steady state model for the following power system components: (i) Synchronous machine, (ii) Transformer, (iii) Transmission line, (iv) Line reactor.
2. What do you understand by one line diagram ? What is the difference between one line diagram and impedance diagram ? Explain with the help of examples.
3. Describe single line diagram representing synchronous machines, transformers and feeders from generating end to distributing end. Discuss about impedance and reactance diagram with examples.
4. Draw an impedance diagram of power system with correct labelling of each section with transformer rating from generation to load point.
5. What do you understand by per unit representation of a power system ? Discuss.
6. What is meant by percentage reactance ? Why is it preferable to express the reactances of various elements in percentage values for short-circuit calculations ?
7. Explain the terms base kVA, base kV and percentage reactance. State the relationship between them.
8. Define (i) Percentage reactance, (ii) Percentage reactance at base kVA and (iii) Short-circuit kVA.
9. Define per unit impedance and then give expression for base impedance and per unit impedance referred to a new base. Also list the advantages of per unit system.
10. What are the advantages of per unit representation ? Show that per unit equivalent of two winding transformer is same whether the calculation is made from the high voltage side or from low voltage side.
11. What are the advantages of per unit representation.
Why the per unit system is used in power system analysis ? Which of the electrical quantities are chosen as base values ?
12 Explain the advantages of per unit system and derive the fundamental relations between the actual values and per unit values on chosen base values for a three-phase system.
13. Discuss per unit system. How are the base values chosen in representation of a power system ?
14. Discuss per unit system. Explain the per unit representation of a transformer.
15. Discuss the representation of a power system network by reactance diagram.
16. Show that the per unit impedance of a transformer computed from primary or secondary side is same if the voltage bases on two sides are in the ratio of transformation.
17. Write short notes on:
- Single line diagram.
- Change of base.
- Reactance of synchronous machines.