Power factor- In ac circuit there is some phase difference between the voltage and current. The cosine of this angle phase difference is called Power factor or PF. Popularly defined as cosφ.
Power factor types-
Active and reactive component of power factor:
I cosφ is called active or watt full component, I sinφ called reactive or watt less component.Reactive component is very much important for power factor measurement and control. It has a inverse relationship with power factor. The less the reactive component the more is the power factor.
Active, reactive and apparent power-
- VIcosφ- active power in KW.
- VIsinφ- reactive power in KVAR.
- VI- Apparent power in VA.
Electrical power is the geometrical sum of two parts.
• S² = P² + Q², where
S = Apparent Power, kVA
P = Active Power, kW
Q = Reactive Power, kvar
• cos φ = P/S=PF, power factor which tells us what is the proportion between the active and the apparent power, how much there is active power in apparent power.