INVESTIGATION ON INTELLIGENT SOFT COMPUTING TECHNIQUES FOR QUALITY ENHANCEMENT OF POWER GRID
In this paper, a four power semiconductor switch based three-phase inverter is proposed. The proposed topology b-4 of three-phase inverter is investigated to make the commercial micro-grid system to be cost effective and hardware optimized. A simple Sine PWM (SPWM) based control strategy is proposed for the b-4 inverter topology instead of the traditional complex four-switch based Space Vector techniques. A novel technique of using the Spatial Repetitive Controller (SRC) is also proposed to eliminate the effect of mid-point voltage fluctuation of the DC link even in the case of asymmetrically split DC link capacitors without any extra voltage or current sensors unlike conventional methods.
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