Performance Analysis of Five Level Modular Multilevel Inverter for PV-Grid Connected System

A multilevel inverter’s primary function is the conception of nearly sinusoidal voltage by combining multiple levels of dc voltage. As the number of levels increases, the output waveform of the obtained algorithm has more steps, resulting in a staircase-like ripple which resembles the desired waveform. The output wave’s harmonic distortion decreases and eventually approaches zero as the number of voltage levels increases. This article highlights the performance analysis of a five-level inverter with variable loads. Due to fewer driver circuits, this topology is less expensive than conventional multilevel inverters for the same five output levels. Both high frequencies switching pulse width modulation and fundamental frequency switching modulation techniques are used to simulate the proposed modular five level topology. To verify the viability of the modular multilevel inverter topology, the output voltage, current waveform, and THD are compared and examined using MATLAB/Simulink.