Abstract
Recently, almost all industrial devices are mostly built on electronic devices which are precisely sensitive to harmonic. In order to meet the requirement from the industries demand aimed at a free-harmonics and high power rating source is remarkably increased in past few years. An inverter which a device or electric circuit that convert direct current to alternating current is one of the electronic devices that give concern to researchers for improvement of generating a neat power source. The inverter can be categorized into a single level and multilevel inverter. As compared to single level inverter, multilevel inverter offers minimum harmonic distortion and higher power output. This paper presents a model of multilevel inverter using 7-level Cascaded H-Bridge of multilevel DC-AC inverter to reduce total harmonic distortion with different sinusoidal pulse width modulation such as phase disposition and phase opposition disposition. Simulation output of single phase multilevel inverter cascaded H-bridge are analysed and verified in the Matlab/Simulink software. The result show that the 7-level cascaded H-Bridge multilevel inverter with phase disposition technique generate less total harmonic distortion if it is compared to the phase opposition disposition technique.
Highlights
The increasing number of electrical energy loads causes the increasing consumption of fossil fuel
This paper present a modeling of a seven-level cascaded H-bridge inverter and performance verification of the inverter in different Sinusoidal Pulse Width Modulation (SPWM) control techniques
Phase Opposition Disposition (POD) introduced the techniques of carriers (m-1) where the top and bottom carriers of the zero reference are in phase
Summary
The increasing number of electrical energy loads causes the increasing consumption of fossil fuel. This high consumption will affect the increasing of environment pollution. Due to concern toward pollutions and insufficient of conventional energy resources many countries change over to renewable energy sources. Among these sources, solar energy is on attention because of the unlimited power, pollution free, reliability and low maintenance cost [1][2][3][4][5]. By increasing number of level lead to complexity of circuit when high number of switches is needed. This paper present a modeling of a seven-level cascaded H-bridge inverter and performance verification of the inverter in different Sinusoidal Pulse Width Modulation (SPWM) control techniques
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