Control no Lineal para un Convertidor Conmutado CC/CA

Abstract

This undergraduate project will be part of a global system whose goal is to minimize the power supplied by the conventional electrical grid through the integration of renewable energy sources. The complete system is divided into two main blocks. The first is responsible for capturing energy from solar panels and supplying a variable direct current (DC) bus. The second block, the focus of this work, involves designing an inverter with current control that will be connected in-line with the electrical grid. For this inverter, a non-linear control technique will be implemented and compared to the performance of a conventional PI control technique. In most cases, these converters are controlled using linear control techniques, which may be insufficient to address disturbances and dynamic changes in the system. In contrast, the proposed non-linear approach in this project aims to enhance the converter’s response and its ability to adapt to different operating conditions. The project is divided into several stages. Firstly, a control strategy is selected through a literature review to explore various control techniques documented in the literature and previously applied in other converters. Subsequently, the available plant at Santo Tomás University is characterized to understand its operation in detail. Then, a mathematical model is developed to accurately describe the system. Finally, the selected control strategies are designed and implemented for an output power of 200 watts. Simulations will be used to validate the design and adjust the necessary parameters to consistently and controllably achieve the desired output power. Once validated in simulations, the selected controllers will be implemented on the available plant, and practical tests will be conducted to verify their performance. It is expected that the results of this undergraduate project will contribute to the advancement of research in the field of power electronics and non-linear control. Additionally, it is anticipated that this non-linear approach will have practical applications in electrical power generation, improving the efficiency and integration of renewable energy sources into conventional electrical grids. Keywords: Alternating Current, Direct Current, Energy Conversion Converter, Mathematical Model, Nonlinear Control.