What should be the capacitor power to be used for compensation of the 100kVA transformer?​

1 thought on “What should be the capacitor power to be used for compensation of the 100kVA transformer?​”

1. It depends on power factor of the load and degree of compensation you want to implement.

   Suppose your loaf p.f is cos (theta)

   and you want k% compensation

   and Q is the MVA rating of the transformer.

   then Q/sin(theta) is the MVar of load and k*Q/100*sin(theta) is the reactive power to be compensated total.

   then per phase compensation for a 3-phase transformer will be k*Q/3*100(sin(theta)=L

   and per phase capacitor will be calculated from V2/Zc =L equation

   Where V is the input voltage for the side where capacitor is kept

   and Zc = 1/wc = capacitive reactance

   w=2*pi*f

   f=system frequency.

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