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HOW DISTANCE PROTECTION IS DONE IN EHV TRANSMISSION LINES?
WHAT IS THE BASIC TECHNIQ OR FUNDA USED BEHIND THIS ?
SPECIALLY EXPLAIN?IMPEDANCE METHOD.

Answers were Sorted based on User's Feedback



HOW DISTANCE PROTECTION IS DONE IN EHV TRANSMISSION LINES? WHAT IS THE BASIC TECHNIQ OR FUNDA USED ..

Answer / krishna rao vutukuru

distance protection can be done in 3 ways by measuring
1)impedance method(impedance relay)
2)reactance method(reactance relay)
3)admittance method(mho relay)

reactance relay used for detection of earth faults(since it is indepedant of ground resistance)

mho relay is used for protection of long transmisson lines(since it is less affected by power swings)

impedance relay is used for protection of medium lenghth transmisson lines.

Is This Answer Correct ?    7 Yes 1 No

HOW DISTANCE PROTECTION IS DONE IN EHV TRANSMISSION LINES? WHAT IS THE BASIC TECHNIQ OR FUNDA USED ..

Answer / nirujogi suresh

reactance relay is less affected by power swings as it is response to only for grounded faults

Is This Answer Correct ?    3 Yes 0 No

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