Dynamic Energy Management and Low THD Operation of a 19-Level Cascaded H-Bridge Multilevel Inverter

Abstract

As the globe puts more and more importance on clean and efficient energy, the usage of Renewable Energy Conversion Systems (RECS), such as solar photovoltaic and wind power technologies, is growing quickly.   To connect these sources to the electricity grid, we need to create more sophisticated inverter technologies. This study looks at the modular multilevel inverter (MMI), a novel kind of architecture made for renewable energy applications that work at medium and high voltages. The MMI has a modular architecture that improves the quality of the voltage and makes it easier to scale.  This architecture gives you more control, less harmonic distortion, and higher fault tolerance.  Using state-space analysis, we create a whole mathematical model that shows how the MMI works on the inside. This approach comprises balancing the voltage of the capacitor and controlling the current that flows through it. This presentation talks about a complete control system that actively controls direct current regulation, balances voltage, and has ways to stop circulating current that work well. MATLAB/Simulink simulations show that the MMI works well with a solar PV system that is linked to the grid.  The findings show that there is very little total harmonic distortion (THD), balanced submodule voltages, and a quick dynamic response to changes in the environment and the grid. The suggested model and control strategy guarantee efficient and dependable power conversion, establishing a foundation for future investigations into real-time control, fault diagnostics, and hardware-in-the-loop implementation within smart grid contexts.