Abstract

In this paper, a digital adaptive notch filter (DANF) based control algorithm is presented for a solar photovoltaic integrated unified power quality conditioner (PV-UPQC). Two DANFs are used for extraction of fundamental active current amplitude and also fundamental grid voltage template. The PV array is integrated directly to the DC-link of PV-UPQC. The shunt compensator compensates for the load current harmonics and also supplies active power from PV array into the grid while maintaining DC-link voltage. The series compensator of PV-UPQC compensates for grid voltage sags and swells. The PV-UPQC system is modeled and its performance is simulated in Matlab-Simulink under dynamic conditions such as irradiation variation and grid voltage sag/swell.

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