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Compute Volt Var Regulation
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Compute Volt Var Regulation

INSTRUCTION ON HOW TO USE:
Enter kVA = 672 in input box and kW = 500 in input box
Then click the solve for "kVAR" buttton. Answer kVAR = 450 rounded off
To increase true power in kW, one way to do it is to regulate your VAR, reactive power designated by variable letter Q. Reactive power can be mostly capacitor load, inductive load, and combination of both.
To do scenario analysis simply change the input data. For example what will happen to Effective (True Power in kW) if you reduce the kVAR to 300 and maintain the 672 kVA?
Instruction: click the kVAR input box and enter 300 then click the "solve" button in kW to find the new kW. Then scroll down to calculated power factor and click the "solve" button. You improve your power factor from 74.3% to 89.5%
What is the new value of power factor after reducing the kVAR? Answer 89.5%

Again what will happen if you reduce the kVAR to 150 and maintain the 672 kVA? What is the new value of power factor after reducing the kVAR? Answer 97.5%
Application in real work in any electric power utility, behind the scene there is a well trained and qualified operator that regulate the switching of mostly capacitive load , also called as capacitor bank and mostly inductive load, also called reactor bank. and possibly combination of both.
Now you know the first principle how to increase the true power (kW) by regulating the VAR. By lowering the value of your VAR you increase your true power. With feedback loop you can automate the regulation (increasing or decreasing the VAR). One way to do it by using voltage sensor. Hence the feedback loop system is called the Volt-VAR regulation.


Given (Q - reactive power) kVAR = 450 Click if " kVAR " is the missing data. Reduce 450 kVAR to 150 kVAR then click the Solve button in kW


Given (P - active or true power) kW = 500 Click if " kW" is the missing data


Given (S - apparent power) kVA = 672 Click if "kVA" is the missing data

Calculated Power Factor, initial PF = 0.743 ; new value Click

Calculated Degree, initial value = 42 ° Degree ° new value

500 kW

655 kW

Your browser does not support the canvas element. Power Triangle,
angle shown not scale Mostly Capacitive Load P = 500 kW 449 kVAR Q - Capacitive Load S = 672 kVA 42 degree
Your browser does not support the canvas element. Power Triangle,
angle shown not scale P = 500 kW Mostly Inductive Load - 449 kVAR Q - Inductive Load S = 672 kVA - 42 degree


Link to Parallel RLC circuit


To calculate Power Factor (PF) input data requirements are the kW and kVA. It must be available.

Formula Recall

S2 = P2 + Q2 Power Triangle Formula

NaN means Not a Number , what it means is the calculated answer is a complex number.This calculator only allows real numbers. So when the answer is a complex number, NaN will appear. Also if you enter any letter in the input box, example letter O, NaN will also appear.

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