Fuzzy Logic Direct Power Control of a Bidirectional Three-Phase ACIDC Converter

Abstract

This paper develops a modern control strategy in order to command an AC/DC converter. This technique is a combination between Direct Power Control and Fuzzy Logic (FL-DPC). First of all, the first phase consists in mathematical modeling of the proposed converter using Kirchhoff's equations. Subsequently, the second part is devoted to the description of the main blocks constituting the fuzzy controller. Thereafter, he developed the inputs of the fuzzy controller as well as its output. In a concrete way, the author specified as inputs; the sector and the two errors of the active and reactive powers. However, the control vector is designated as an output. Therefore, with a view to accomplish good performances like; a sinusoidal waveform of current, a small rate of THD, an almost unitary power factor and a reliable adjustment of the DC bus voltage, the author resorted to the Matlab/Simulink environment. Finally, the bidirectional power flow is checked based on the simulation of three scenarios; inverter mode, rectifier mode and shut-down mode.