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| Capacitor Bank Sizing |
Showing posts with label capacitor sizing. Show all posts
Showing posts with label capacitor sizing. Show all posts
Thursday, April 17, 2014
Sunday, April 6, 2014
Required Size of Capacitor
Size of capacitor for improvement of the Power Factor from Cos ø1 to Cos ø2 is:
Required size of Capacitor (Kvar) = KVA1 (Sin ø1 – [Cos ø1 / Cos ø2] x Sin ø2)
Where KVA1 is Original KVA.
Optimum location of capacitors
L = [1 – (KVARC / 2 KVARL) x (2n - 1)]
Where:
L – distance in per unit along the line from sub-station.
KVARC – Size of capacitor bank
KVARL – KVAR loading of line
n – relative position of capacitor bank along the feeder from sub-station if the total capacitance is to be divided into more than one Bank along the line. If all capacitance is put in one Bank than values of n=1.
KVARC – Size of capacitor bank
KVARL – KVAR loading of line
n – relative position of capacitor bank along the feeder from sub-station if the total capacitance is to be divided into more than one Bank along the line. If all capacitance is put in one Bank than values of n=1.
Voltage Rise due to Capacitor installation:
% Voltage Rise = (KVAR(Cap) x Lx X) / 10 x Vx2
Where:
KVAR (Cap) – Capacitor KVAR
X – Reactance per phase
L – Length of Line (mile)
V – Phase to phase voltage in kilovolts
X – Reactance per phase
L – Length of Line (mile)
V – Phase to phase voltage in kilovolts
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