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Design and Implementation of Sensorless DC Voltage Regulation for Shunt Active Power Filter Based Single Phase P-Q Theory

In this study, the sensorless DC voltage regulation approach for a shunt active power filter (SAPF) has been suggested. The proposed approach has been combined with the single-phase p-q theory to enhance power quality of the grid. The sensorless DC voltage regulation is based on the calculation of the operating losses of the SAPF throughout each operation period. The validity of the proposed approach is evaluated by simulation study realized in Matlab/Simulink, and confirmed on the power system prepared in the laboratory. The results of the arranged simulation and the implementation studies demonstrate that the sensorless DC voltage regulation is as effective as the proportional-integral used classically in the SAPF applications. Due to reduced number of sensors, the developed combination is not complicated, and its cost is less than classical PI control.