ANALYSIS OF THE IMPACT ON POWER QUALITY OF THREE-PHASE ACTIVE RECTIFIERS FOR DISTRIBUTED GENERATION BASED ON VOC AND DPC CONTROL TECHNIQUES

This chapter presents a comparison among control strategies of active rectifiers used for grid connected distributed generation systems from renewable sources to evaluate their impact on Power Quality. The following techniques have been considered: Voltage Oriented Control (VOC), Direct Power Control (DPC), two DPC based techniques to minimize the Common Mode (CM) emissions called DPC-EMC1 and DPC-EMC2, set up by the authors, and their versions based on virtual flux. All the described techniques have been implemented using Matlab-Simulink? environment and PLECS?, then they have been tested experimentally on a properly devised test setup. In the results, as most significant variables, the current injected into the grid, the THD of the injected current vs. generated power and vs. DC link voltage and the CM voltage have been shown both in simulation and experimentally.