The DC-AC inverter load at output of the interleaved converter leads to second order ripples (SORs) in the voltage and currents on the DC side. The second order ripple currents (SRCs) tend to propagate through the interleaved converter to the source because of the low value of the passive components in an interleaved converter. These ripples cause increase in power loss, rise in temperature, electrode degradation in battery and affects operating life span of sources. In this paper, a Source Current Feedback based Virtual Impedance Control (SCF-VIC) is proposed which virtually increases the inductance in series of the source of the interleaved converter, at a desired frequency. The proposed (SCF-VIC) consists of a proportional-integral controller and a virtual impedance control block. The source current is fed into the control loop through a filter whose gain is modified in order to achieve a varying impedance. The proposed control reduces the second order harmonic currents and does not affects the transient performance of the converter at other frequencies. The proposed SCF-VIC has been verified to reduce the SRCs through simulation and experimental verification.
