Abstract
Direct Power Control (DPC) method for grid-connected Voltage Source Inverter is popular due to number of advantages such as elimination of inner current control loop, direct voltage vector selection, direct control of instantaneous active and reactive powers, and improved dynamic response. For voltage source inverter, effect of particular vector is to produce finite variations in instantaneous active and reactive power in a given sector. This paper investigates different switching patterns of DPC method for grid-connected Voltage Source Inverter. The performance of various switching tables such as Noguchi Table and Eloy-Garcia Table is studied. Based on the above tables, a modified table is proposed for 12-sector approach. The proposed method has less active as well as reactive power errors and can be applied to certain applications such as Active Power Filter and Unified Power Quality Conditioners. These methods are simulated and experimentally validated using RT-LAB + MATLAB Simulink®/Sim Power System tool.
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