Simulink Simulation of Modular Multilevel Inverter (7-Level)

This project presents a Simulink simulation of a modular multilevel inverter (7-level) designed using advanced modularization techniques. The simulation implements a modular architecture where the inverter circuit is decomposed into multiple identical submodules, each containing half-bridge circuits with capacitor banks for voltage balancing. Key algorithmic components include carrier-based PWM modulation with phase-shifted carriers for harmonic reduction and voltage balancing control using sorting algorithms to maintain capacitor voltage equilibrium. The simulation evaluates inverter performance under various load conditions through dynamic testing of output voltage THD, switching losses, and efficiency metrics. Reliability considerations incorporate thermal modeling of IGBT switches and fault tolerance analysis through redundant submodule implementation. The model provides foundational code structure for implementing capacitor voltage balancing algorithms, closed-loop control systems, and modular scalability to higher level counts using MATLAB Function blocks and Simulink's power electronics library components.