My load is 1635 KW. & current pf is 0.884, I have to improve it for 0.99.Please suggest what KVAR value is needed?
Answer / Suman Bharti
To improve the power factor (PF) from 0.884 to 0.99 (which is close to unity), you would need to compensate for the reactive power deficiency in your load. Capacitor banks are typically used for this purpose, and their capacity can be measured in kVAR.
First, calculate the current reactive power (Q) using the formula Q = P * sqrt(1 - PF^2), where P is the active power (1635kW). Substituting PF = 0.884 gives:
- Q = 1635 * sqrt(1 - 0.884^2) ≈ 190 kVAR
To achieve a power factor of 0.99, the reactive power should be close to 1635kW (as the active power), so you would need a capacitor bank with approximately 1635 - 190 = 1445 kVAR.
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