Simulation Model for Three-Phase Three-Level IGBT Inverter with Implementation Details

This paper presents a detailed simulation model for three-phase three-level IGBT inverters, incorporating MATLAB/Simulink implementation strategies and power electronics control algorithms. The model facilitates deeper understanding of inverter operational principles and enables the design of high-efficiency power conversion systems. We begin by explaining the fundamental working mechanisms of three-level inverters, covering three-phase power supply configurations, IGBT switching characteristics using PWM modulation techniques, and output filter circuit design considerations.

The implementation section demonstrates how to construct the inverter simulation model using power electronics toolbox functions, including IGBT modeling with snubber circuits and dead-time compensation algorithms. We explore various simulation tools and techniques, such as carrier-based PWM implementation with level-shifted modulation and phase-disposition methods for voltage balancing. The simulation code structure includes key functions for gate signal generation, voltage balancing control, and harmonic analysis using FFT algorithms.

Finally, we demonstrate how to utilize the simulation model for design optimization through parameter sweeping techniques and performance evaluation metrics like total harmonic distortion (THD) calculation. The model incorporates fault diagnosis features including overcurrent protection algorithms, short-circuit detection routines, and thermal management simulations. Through this study, readers will gain comprehensive knowledge of three-phase three-level IGBT inverter operation principles, simulation implementation methods, and practical engineering application techniques for renewable energy systems and industrial drives.