i want to know that does capacitor comsumed any energy means real power capacitor is of 440 v 100 kvar and if then how should i calculate?
A real capacitor or bank of capacitors is not just a capacitor. Real capacitors have an equivalent series resistance (E.S.R.) and equivalent series Inductance (E.S.L). Capacitors heat up when you pass they conduct and an Alternating Current, because of their (E.S.R.). Most small capacitors for electronic applications do not conduct much current so their E.S.R. is not often published but capacitors for high power applications conduct a lot of current and their E.S.R. is often published with a tolerance range. To determine what power is consumed, you need to find the E.S.R. number (R) for the capacitors, find the average (R.M.S.) value of the current (I) that they will be conducting and use the formula. P I?R
As i know, real pwrVI*P.F. And in case of a capacitive ckt P.F0. Hence capacitor doesn't consumes any energy.
if it's an ideal capacitor, which is usually considered to be, its resistance will be zero, so the real power will be zero. however, in practice, there is always a resistance (even if small) present, which will produce real power. given by, P V * I V^2/R (I^2) * R. in this problem, we can't find current or resistance through the given data. hence, the resistance is to be considered zero.
All real capacitors have some series resistance (ESR). The power loss is Icap^2*ESR.
A perfect Capacitor does not consume energy unless it was a leakage bad capacitor under working voltage. Depending on what circuit it was located,it affects the total impedance and total power being consumed.
