Control of Three Phase Cascaded H Bridge Multilevel Inverter Supplied by a Photovoltaic System

Abstract

AbstractThis work presents the control of a three phase cascaded H-Bridge Multi-Level Inverter supplied by the photovoltaic system. In order to obtain a nearly sinusoidal signal at the voltage level, we are interested in obtaining the smallest value of THD. Hence, a N-level space vector modulation (SVM) is used to control this inverter. The power source is produced from photovoltaic modules utilized as DC inputs for the cascaded H-Bridge Multilevel Inverter. The objective of this work aims to design a control strategy to supply the best output quality. The algorithm P&O is applied to extract from the panels the maximum energy. Each PV system employs with its own MPPT control. The PV system outputs are investigated as entries to the cascaded H-Bridge Multi-Level Inverter for achieving a staircase waveform output. A matlab/simulink is used to validate the system performance. The simulation results prove the efficiency of this work, which indicates the high effectiveness of the control and the superior performance of proposed scheme.KeywordsPhotovoltaic systemThree phase cascaded H-Bridge Multi-Level InverterN-level SVMTHD