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Sliding Mode Control of Three-Phase series Hybrid Power Filter with Reduced cost and Rating

This paper presents and discusses the viability of 3-phase hybrid series power filter compensator in a realistic distribution network. The proposed configuration can challenge unified power quality conditioner (UPQC) with less components and a cost. It ensures power quality by compensating current harmonics, reactive power, sag voltage, swell voltage and unbalance voltage. The main contribution is the proposed configuration integrating a control algorithm of the series active filter to compensate reactive power rather than using a thyristor controlled reactor (TCR). The strategy consists of integration a current source angle in the reference voltage to shifts a reference voltage to get unity power factor in the grid side. The sliding mode control (SMC) which a powerful control ensures a stability using Lyapunov candidate function validation. In order to reduce the rating of the active filter, a design of the passive filter is integrated to take care of reactive power and current harmonic compensation due to its low impedance at the harmonic frequency. The studies include simulation results and evaluations of the passive components used to compensate current harmonics. For the validation, an implementation and testing results are carry out using Matlab/Power Systems (PS).