Estudio comparativo de técnicas de control PI y difuso para la estabilidad de tensión de un inversor trifásico en sistemas fotovoltaicos, evaluando el voltaje en estado transitorio y estable

En el presente artículo se aborda un estudio comparativo de dos métodos de control diferentes implementados para la mejora de la calidad de voltaje a la salida de un inversor CC/CA trifásico fotovoltaico. En el estudio se aplica un control clásico PI y un control heurístico por lógica difusa, los dos de manera independiente controlando el ciclo de trabajo (PWM). Para la comparación de los dos controladores, se ha puesto en consideración tres casos experimentales, en cada uno se ha modificado las condiciones ambientales de temperatura e irradiancia del panel fotovoltaico. Como resultado de la investigación se concluyó que el controlador difuso presenta mejor calidad, debido a que sus valores de error en estado estable están por debajo del 0.133%, por otro lado, sus valores característicos como voltaje pico, tiempo de sobre pico y tiempo de establecimiento, son más favorables ante el control clásico PI. El diseño de los controladores y el sistema se lo ha implementado en el software Matlab-Simulink, apto para el modelamiento de sistemas dinámicos. Finalmente, se recomienda el uso del control difuso por sus ventajas de estabilidad a niveles de media tensión, idóneo para aplicaciones industriales.This paper deals with a comparative study of two different control methods implemented to improve the voltage quality at the output of a three-phase photovoltaic DC/AC inverter. The study applies a classical PI control and a heuristic control by fuzzy logic, both independently controlling the duty cycle (PWM). For the comparison of the two controllers, three experimental cases have been considered, in each one the environmental conditions of temperature and irradiance of the photovoltaic panel have been modified. As a result of the investigation it was concluded that the fuzzy controller presents better quality, because its steady state error values are below 0.133%, on the other hand, its characteristic values such as peak voltage, over peak time and settling time, are more favorable than the classical PI control. The design of the controllers and the system has been implemented in Matlab-Simulink software, suitable for modeling dynamic systems. Finally, the use of fuzzy control is recommended for its advantages of stability at medium voltage levels, suitable for industrial applications

Smart Technologies. SmartTech-IC 2021: Proceedings of the Second International Conference on Smart Technologies, Systems and Applications

This book contains a group of selected papers, which were presented at the Second International Conference on Smart Technologies, Systems and Applications (SmartTech-IC 2021) held on December 1-3, 2021 in Quito, Ecuador. The SmartTech-IC conference aims to attract researchers, scientists and technologists from some of the top companies, universities, research groups, and government agencies from Latin America and around of the world to communicate their research results, inventions and innovative applications in the area of smart science and the most recent smart technological trends. The second edition of SmartTech-IC conference was organized by the Universidad Politécnica Salesiana (Campus Giron), a private institution of higher education with social purposes, nonprofit and co-financed from the Ecuadorian State. The SmartTech-IC conference has been conceived as an academic platform to promote the creation of technical and scientific collaboration networks. The goal of the conference was addressed some relevant topics related to smart technologies, smart systems, smart trends and applications in different domains in the field of computer science and information systems that represent innovation in current society