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Design and Control of a Photovoltaic Distribution System Based on Modular Buck-Boost Converters
Diseño y control de un sistema de distribución fotovoltaico basado en convertidores Buck-Boost modulares
Keywords:
solar energy, DC-DC power converters, DC-AC power converters, microgrids, energy management systems (en)energía solar, convertidores de potencia DC-DC, convertidores de potencia AC-DC, microrredes, sistemas de gestión de energía (es)
The main contribution of this research is the design of a series hybrid topology for a photovoltaic distribution system using Buck-Boost converter modules. This design incorporates a maximum power point tracking (MPPT) algorithm based on the perturb and observe method, linear PI controllers, and an energy management algorithm. The controllers' design is validated through simulation using PSIM and SISOTOOL/MATLAB. This work aims to achieve active power-sharing in the AC grid through a control loop implemented with a three-phase inverter. The validation of the topology and controller design demonstrates tracking and robustness in four test scenarios for the state variables in microgrids: constant and variable irradiance conditions, auxiliary storage device (ASD) protection and control loops, and power-sharing with the AC grid, while considering the DC system dynamics.
La principal contribución de este trabajo de investigación es el diseño de una topología híbrida en serie para un sistema de distribución fotovoltaico, empleando módulos de convertidores Buck-Boost. Este diseño incorpora un algoritmo de seguimiento del punto de máxima potencia basado en el método perturbar y observar, controladores PI lineales y un algoritmo de gestión de energía. El diseño de los controladores se valida mediante simulación en PSIM y SISOTOOL/MATLAB. El objetivo de este trabajo es el reparto de potencia activa en la red mediante un lazo de control implementado en un inversor trifásico. La validación de la topología y el diseño de controladores demuestra seguimiento y robustez en cuatro escenarios de prueba para las variables de estado en microrredes: condiciones de irradiancia constantes y variables, lazos de control y protección de dispositivos de almacenamiento auxiliar (ASD) y reparto de potencia en la red AC considerando la dinámica de los sistemas DC.
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Copyright (c) 2023 Harrynson Ramírez-Murillo, Carlos Andrés Torres-Pinzón, José Fabián Salazar-Cáceres, Valentina Vera-Salda´ña, Carlos Javier Mojica-Casallas
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