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The large inverters are satisfied the expanding demand of medium and high power industrial applications, present which are reach out to hundreds of megawatt power. Connect solitary one power semiconductor switch openly to the grid owing to the high voltage variety, currently it is very challenging. Multilevel Inverters (MLI) are use elevated speed switching components, so they are avoiding that complication of connecting them straight to the network by hooking solitary devices among manifold DC stages. This paper deals with comparative analysis and design of the Cascaded-H-Bridge (CHB) Multilevel Inverter and Modular Multilevel Converter (MMC).The main objective of this paper is to analyze the performance of Cascaded-H-Bridge MLI and Modular Multilevel Converter for different levels of voltage by using sinusoidal pulse with modulation(SPWM) techniques like in phase disposition (IPD), phase opposition disposition (POD) and alternate phase opposition disposition (APOD)and to find out which Modulation technique will give better THD and improve efficiency of converterby using MATLAB/SIMULINKsimulations.
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