A Novel Reference Current Calculation Method for Shunt Active Power Filters using a Recursive Algebraic Approach

Abstract

This paper presents a novel method to calculate the reference source current and the reference<br />compensating current for shunt active power filters (SAPFs). This method first calculates the<br />amplitude and phase of the fundamental load current from a recursive algebraic approach block<br />before calculating the displacement power factor. Next, the amplitude of the reference mains current<br />is computed with the corresponding phase voltage. Finally, the difference between the actual load<br />current and the reference source current is considered the reference compensating current to be<br />delivered by the SAPF. The proposed method is presented and applied to the control system of the<br />voltage source converter of SAPFs. The performance of the proposed method in reducing harmonics<br />and improving the power factor is examined with a SAPF simulation model. The results are compared<br />with the instantaneous active and reactive p-q power theory as other reference generation method.