Power factor for capacitive load?

Question

as we know, most domestic loads are inductive load.. so, we need to improve power factor using capacitor that connected in parallel with the load.. But, sometime we also have capacitive load, we also need to improve power factor of that? if yes, how?

Answer 1

There is much to be said about the correct wire size for the load and the derating for distance. Third floor bathrooms with both having hair dryers running with air conditioners  on same phase all  running at the same time on THHW # 12. Separate circuits for all with proper sized wires will improve power factor for circuits.

Answer 2

In theory you would need to add inductors (reactance) to bring the power factor (PF) closer to unity.

In the real world I am unaware of customers with capacitive equipment that causes a leading power factor bad enough to need correction.

Your probably trying to maintain near unity power factor at the main service entrance.  Any capacitors or inductors you turn on/off to improve the PF will be shunt connected.  

Think of it this way, the power factor of the sum is equal to the weighted sum of the individual power factors.

Answer 3

As you said the capacitive Load,there is a possibility in Long line High voltage Transmission network.Between the conductor the air will act as a Insulation Resistance wich will give an additional capacitive voltage.So when you see the sending & receiving end voltage,the voltage at R.end will be higher than the S.end voltage offcourse it will be in leading side,

To reduce this effect the Line reactors will be installed in the receiveing end so that the unity power factor will be maintained.