DECOMPOSITION OF CURRENT THROUGH ACTIVE POWER FILTER FOR COMPENSATING HARMONICS CURRENT AND REACTIVE CURRENTS

V.Pardha Saradhi, P.Dhana Selvi

Abstract: APFs have now become an alternative solution to harmonic filtering technology. APF is to compensate the harmonic currents due to the non linear load .This paper mainly deals with shunt active power filter which has been widely used for harmonic elimination and supplying reactive currents. We can monitor the load continuously by using active power filter. The proposed scheme decomposes the load current into positive and negative sequence fundamental frequency active components, reactive component and harmonic components in modified PQ theory. Estimating reference current signal nonlinear loads, especially power electronics converters based adjustable speed drives, computer power supplies, furnaces etc,by using PQ theory.

Keywords: Active power filter, harmonics, reactive currents, PQ theory

DOI: https://doi.org/10.15623/ijret.2012.0103013