If load is 240 kw & pf is 0.8 lagging, than how to increase
it from0.8 to 1.0(unit),which rating capacitor used, please
give me Calculation. What is effact of consumer & suplier
if pf is lagging or leading with on effect machines/ TF/GE
etc.
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Answer Posted / ashish kumar rai
We can improve power factor by:-
1) Capacitor
2) Synchronous motor
3) Synchronous Generator
When Power facto Cos(pi)= .8
KW = KW*Cos(PI) = 240
KVA = KW/ Cos (pi)= 300
KVAR = KW*Sin(pi) = 180
When Power factor Cos(pi)= 1
KW= 300
kVA = 300
KVAR= 0
So we use the capacitor of rating of 180 kvar to neutralise
the inductive 180 kvar.
Effect on consumer:-
1) Lower utility fees by:
a. Reducing peak KW billing demand
b. Eliminating the power factor penalty
2) Increased system capacity and reduced system losses in
your electrical system
3) Increased voltage level in your electrical system and
cooler, more efficient motors
Effect on Utility:-
1) It has to generate less poaer
2) Reduced Current Hance Reduced losses
3) Less condutor for transmisssion
4) Less current hence insulating cost
4) Less conductor and insulation decrease cost of
supporting structure
5) High Efficiency
6) More stable system
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