PV Integrated UPQC for Power Quality Improvement Based on MAF-SRF

Abstract

In this proposed article, application of Unified Power Quality Conditioner (UPQC) in Photovoltaic system is discussed. A controller based on synchronous reference frame (SRF) is utilized to generate the switching signals for shunt and series compensator. The load compensation is obtained through the implementation of moving average filter (MAF). It is is utilized as in-loop filter to filter out high frequency component of non-linear load current. The UPQC has the benefits of both shunt and series compensation, i.e., current and voltage related power quality (PQ) issues respectively. The PQ issues like harmonic elimination, reactive power compensation, voltage sag, voltage swell and load imbalance are mitigated through PV connected UPQC. This article also emphasis the application of green energy resources such as Solar Power Generation. The THD of source current and source voltage are limited under IEEE-519 and IEEE-1159 standards. The performance of UPQC-PV is tested and analysed in MATLAB platform having nonlinear load. A comparison has been made between the conventional SRF which includes Type 1 Low pass filter (LPF) for load current filtration and proposed SRF which includes MAF for load current filtration control techniques.