Modeling and Control of SEPIC Converters in Hybrid Microgrid Application using Exact Linearization Technique

In order to provide energy for irrigation, electric motors, lighting, and other uses, hybrid systems are becoming more and more necessary in rural microgrids. For usage in a microgrid based on solar energy and wind energy, where nonlinear converters are employed, this work describes the application of an exact linearization technique for the modeling and control of a SEPIC converter. Wind and solar energy modules are harvested by a single-ended primary inductor converter (SEPIC), and the energy flow between the battery and the grid is controlled by a bidirectional buckboost converter, which permits battery charging and discharging. The exact linearization theory designed for power converters is applied to both units. By linearizing the converter model, this technique essentially allows for the consideration of various operating points under various conditions. This work offers a comprehensive overview of the implemented microgrid topology and includes experimental results to highlight the effectiveness of the proposed control system.