1. Explain the advantages and disadvantages of various communication channels used for pilot protection? 2. Mention...

1. Explain the advantages and disadvantages of various communication channels used for pilot protection?

2. Mention the advantages of single pole tripping.

3. What is a bay control relay?

4. Explain pole discrepancy scheme.

5. Explain three pole trip and reclose for a transmission line with series compensation.

6. Explain the impact on power transfer capability for various types of faults (SLG, LLG, LL and 3-phase) with the help of P-? curves.

7. What is the difference between direct transfer trip and permissive transfer trip schemes?

8. Provide an example for phase comparison scheme.

9. Mention the limitation of power line carrier based communication.

10. Explain the disadvantages of transfer trip schemes.

11. What is the significance of a guard signal in DCUB scheme?

12. Explain the impact of week infeed on POTT and DCUB schemes.

13. Explain how the fault resistance coverage increases with communication based protection schemes. Make use of mho circles.

14. What is an adaptive reactance element? When is it used?

15. Explain the impact of mutual coupling on ground distance relays.

16. Explain the criteria to setup the blinders for power swing and load encroachment. Draw appropriate diagrams on a complex plane.

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Manojponduru answered 1 year ago

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