Various PWM Techniques for Controlling Multi-Level Inverters in PV Systems

Abstract

The increasing demand for energy and environmental pollution produced by conventional energy has made it the reason for the emergence of renewable energy such as solar energy and the world depends on it today. However, its effectiveness and variability have made it a new challenge and subject of research. In this thesis, we will discuss the importance of using a multi-level inverter in a grid-connected photovoltaic system, and its contribution to improving the directed energy of the grid. We will become familiar with the types of multi-level inverters. But we will pay attention to the cascade inverter because it is characterized by multiple sources Total input voltage. This makes it a suitable choice for a grid-connected photovoltaic system. We will build on the evolution of inverter switch control technologies using well-known switching technologies such as PWM. And we show their effect on the work of the inverter using the MATLAB program and the THD value of each technique