Comprehensive Analysis of Multilevel Inverter Performance

Multilevel inverters represent advanced power electronic systems extensively utilized in high-power applications to enhance voltage quality and minimize harmonic distortions. The analysis of these inverters requires thorough understanding of their topological structures, switching mechanisms, and performance indicators such as Total Harmonic Distortion (THD). This program delivers a systematic methodology for assessing multilevel inverter performance via simulation-based analysis. The implementation employs MATLAB/Simulink environments to model inverter topologies and evaluate key performance aspects. The code structure includes modular components for: Topology Comparison – The program incorporates configurable blocks for evaluating various multilevel inverter architectures including Neutral Point Clamped (NPC), Flying Capacitor, and Cascaded H-Bridge designs. Each topology module contains parameterized components allowing customization of voltage levels and component specifications. Switching Strategies – The simulation implements algorithmic modules for modulation techniques such as SPWM (Sinusoidal Pulse Width Modulation) and SVM (Space Vector Modulation). The code includes carrier-based PWM generators with adjustable frequency ratios and modulation indices to optimize output waveform quality. Harmonic Analysis – A dedicated FFT (Fast Fourier Transform) analysis module calculates THD values and identifies dominant harmonics through spectral decomposition algorithms. The implementation features automated reporting functions that compare results against international grid standards like IEEE-519. Efficiency Metrics – The program contains loss calculation algorithms that evaluate switching device losses (IGBT/MOSFET) and overall system efficiency under varying load conditions. Efficiency models incorporate thermal considerations and switching frequency dependencies. The tool streamlines complex computational processes through object-oriented programming architecture, providing researchers and power electronics engineers with valuable insights into design trade-offs and optimization opportunities. The modular code structure allows easy integration of custom topologies and control strategies for extended analysis capabilities.