We have 2 no. 4MW DG set. and GEB supply.
But, we running, only 1 DG set. when we done APFC/Power
factor setting : 0.90, then winding temp. Low. but when
setting done : 0.83, then Winding temp. increase.
WHY Why ? ? ?, plz give me answer.

Answers were Sorted based on User's Feedback



We have 2 no. 4MW DG set. and GEB supply. But, we running, only 1 DG set. when we done APFC/Power ..

Answer / suthan prabhu

The reacive power taken by the load will be same but the
current supplied by the source will increase bcoz the p.f
is decreased from 0.9 to 0.83.hence the winding temperature
increased.

Is This Answer Correct ?    5 Yes 0 No

We have 2 no. 4MW DG set. and GEB supply. But, we running, only 1 DG set. when we done APFC/Power ..

Answer / gurucharan singh

this is clear that at lower pf settings, its the DG which
compensate for the KVAR. which results in the high winding
temperature. For this check the plant loads connected. And
KVAR supplied by EB & DG. Also during parallel with grid DG
generally act as KVAR compensator along with KW supplied.

Is This Answer Correct ?    2 Yes 1 No

We have 2 no. 4MW DG set. and GEB supply. But, we running, only 1 DG set. when we done APFC/Power ..

Answer / sudheer

i think the main reason is load. when the power factor is
0.90 then the generator run smoothly and not over loaded.

Is This Answer Correct ?    2 Yes 1 No

We have 2 no. 4MW DG set. and GEB supply. But, we running, only 1 DG set. when we done APFC/Power ..

Answer / rajnikant dodiya

Simple,
power factor increse, current decrese ane hence losses
(I^2R) reduces. But if Power factor reduces, losses
increases with square of current which makes dg to be hot
compared to increase pf.

Is This Answer Correct ?    0 Yes 0 No

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