How to make the power factor of induction motors be a leading power factor?

[Mathew Joseph]

Hi guys,
This month onwards our power distributor says that we only get powerfactor incentive when only we make the powerfactor leading and in between 0.95 and 1. Our industry fully consists of induction motor and compensative capacitors are provided but this month onwards we have to keep the powerfactor in leading.

Plz help me, how to make the lagging powerfactor of induction motor to leading powerfactor...

 

[anorlunda]

Plz help me, how to make the lagging powerfactor of induction motor to leading powerfactor...

With capacitor compensation in parallel. When the capacitor KVARs are more than the motor KVARs the PF flips from lagging to leading. In other words, overcompensation.

 

[Baluncore]

Leading compensation is a liability. When a circuit breaker or contactor opens, an induction motor can self-excite with the resonant compensation capacitance, producing a high voltage that can damage the insulation. If over-compensated you will need over-voltage protection.

You may do better carefully compensating individual motors than by managing the plant as a whole.
Do the induction motors run continuously with fixed loads or are motors selectively turned on and off?
How many motors are there? how many KVA?

 

[Asymptotic]

This month onwards our power distributor says that we only get power factor incentive when only we make the powerfactor leading and in between 0.95 and 1.

What is your power factor now?

Double check with your power distributor they indeed require a leading power factor. It seems an odd request for the reasons offered in posts #2 and #3. Perhaps they instead want the power factor between 0.95 and 1.0, lagging or leading.