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Answer Posted / ramji
Mr.Sudheer u r not clear.U r telling the condition after DG
starting only, not during running.
Mr.Shri can u please explain me how the voltage will be
fluctuating if the AVR is OFF.
In parallel mode if the AVR of the suspected DG
fails, then the reactive power of the particulat DG gets
reversed because the DG will be out of its running
quadrant.Since the reactive power is reversed, DG will be
trip on under reactance.Also if it is not tripped, its
outgoing current will be increased, so it will trip on Over
current.
In island mode if the AVR of suspected DG set
fails, then the loads connected to it will be thrown off
immediatly and the DG may trip on prime mover overspeed due
to sudden throw of load or undervoltage protection on DG.
| Is This Answer Correct ? | 6 Yes | 2 No |
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