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M. S. Sivagamasundari ¹, P. Melba Mary ²

Affiliations
1 Electrical and Electronics Engineering, V V College of Engineering, Tisaiyanvilai, IN
2 V V College of Engineering, Tisaiyanvilai, IN

Abstract

A Cascaded H-Bridge Multilevel Inverter is a power electronic converter built to synthesize a desired ac voltage from several levels of dc voltages with better harmonic spectrum. This paper analyzes the performance of a cascaded H-Bridge seven level inverter topology employing multicarrier pulse width modulation technique which magnifies the fundamental output voltage with reduction in total harmonic distortion to 24.64% when compared to the five level inverter. The inverter is capable of producing seven levels of output-voltage levels from the dc supply voltage. It can also be easily extended to any number of phases or levels. The performance has been studied by the MATLAB/Simulink. The output shows better performance results.

Keywords

Multilevel Inverter, Cascaded H-Bridge Multilevel Inverter, Multicarrier Pulse Width Modulation, Total Harmonic Distortion.

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M. S. Sivagamasundari ¹, P. Melba Mary ², T. Sreedhar ³

Affiliations
1 Electrical and Electronics Engineering, V V College of Engineering, Tisaiyanvilai, IN
2 V V College of Engineering, Tisaiyanvilai, IN
3 Electrical and Electronics Engineering, SCAD Engineering College, Cheranmadevi, IN

Abstract

Cascaded H-Bridge Multilevel inverters have gained much attention in the field of the medium voltage and high power applications because of their many advantages such as their low voltage stress on power switches, low harmonic distortion and EMI output. This paper presents the performance of a single phase five level cascaded H-Bridge multilevel inverter topology employing multicarrier pulse width modulation for photovoltaic cell. The multicarrier PWM control is based on adaptive fuzzy logic to control MOSFET switch of cascaded H-Bridge inverter. This inverter topology magnifies the fundamental output voltage with reduction in total harmonic distortion. The proposed technique uses the fuzzy logic control to achieve fast transient response and improves the power factor and efficiency. This method can be easily extended to an m-level inverter .The performance has been studied by MATLAB/Simulink.

Keywords

Multilevel Inverter, Cascaded H-Bridge Multilevel Inverter, Multicarrier Pulse Width Modulation, Photovoltaic system, Total Harmonic Distortion.

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