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


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


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