Modular Multilevel Converter (MMC) Based HVDC Power Conversion System with 7-Level Topology

This MATLAB simulation program implements a Modular Multilevel Converter (MMC) based power conversion system for High Voltage Direct Current (HVDC) transmission applications. The simulation encompasses the main power conversion circuitry and sophisticated control algorithms, utilizing a 7-level MMC topology designed to deliver high-efficiency energy conversion technology. The system's core functionality involves converting electrical power from DC transmission systems to AC transmission systems, enabling more efficient power transmission over long distances. The simulation implements key algorithms including nearest level modulation (NLM) for waveform generation and capacitor voltage balancing control for submodule stability. Through extensive testing and validation, the system demonstrates exceptional stability and reliability suitable for large-scale power transmission applications. The code architecture features modular design with separate function blocks for voltage balancing, gate signal generation, and system monitoring. This program serves as a valuable educational and research tool, providing practical insights into MMC-based conversion systems and their real-world implementation challenges. The simulation includes comprehensive documentation of control strategies and performance metrics for thorough technical analysis.