Simulation of SVPWM Control for Three-Level Three-Phase Bridge Inverter Using S-Functions

In this project, we will simulate a three-level three-phase bridge inverter controlled by Space Vector Pulse Width Modulation (SVPWM) technique using S-functions. The SVPWM control strategy enables precise voltage and frequency regulation, significantly improving inverter performance and efficiency. During simulation, we implement custom S-functions to model inverter operations, including sector identification, switching time calculations, and pulse pattern generation using the seven-segment switching sequence. Key algorithmic components include reference voltage transformation (abc to αβ coordinates), vector sector determination through angle calculation, and dwelling time computation using space vector decomposition. The S-function implementation allows real-time monitoring of DC-link capacitor voltage balancing, switching states (P, O, N), and harmonic analysis through FFT. Through this project, we gain deep understanding of three-level inverter operational principles and master practical application and debugging techniques for SVPWM control systems, including dead-time compensation and overmodulation handling.