Shunt Active Power filter apparent power for design process

The main purpose of this paper is the study of the shunt active power filter (APF) compensations capability for different perturbations in three wire AC power system such as current unbalance, phase shift current and undesired harmonics generated by non linear load under balanced power system voltages. Indeed Shunt APF has been proved to be an effective solution to compensate for such disturbances. The capability of the shunt APF is determined by the maximum rate of the apparent power that can be delivered to achieve this compensation under such conditions. This study is based on the definition of the effective apparent power as defined in IEEE 1459-2000 which was proved to be suitable amount to be concerned in the design process of different devices which allows a good estimation of the shunt APF dimensions with low economic burden. The ratio of the compensation apparent power is presented to clarify the capability of the shunt APF.