Nonlinear Voltage Regulation for a Fuel Cell/Battery/Supercapacitor System

Resumen: The present work focuses on the voltage regulation of a DC bus despite instaneous load changes on asystem composed of fuel cell energy generation and hybrid energy storage. The objective is to properly share the power demand between its sources, i.e. fuel cell, supercapacitor, and a battery bank meanwhile fuel cell starvation phenomenon is avoided. Consequently, an adaptive nonlinear controller is designed based on two control loops. The inner loop focuses on current dynamics and its objective is current tracking. The outer loop focuses on the voltage dynamics and its objective is voltage regulation through current tracking generation. Additionally, an adaptation law based on immersion and invariance theory is designed to enhance the closed-loop system behavior through load approximation. Finally, simulations results show the correct performance of the adaptive nonlinear multi-loop controller when sudden load changes are considered.

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C. A. Beltran-Gonzalez, L. H. Diaz-Saldierna, J. Leyva-Ramos, V. M. Ramirez-Rivera, P. R. Martinez-Rodriguez & D. Langarica-Cordoba. Nonlinear Voltage Regulation for a Fuel Cell/Battery/Supercapacitor System. Memorias del Congreso Nacional de Control Automático, pp. 328-333, 2021.

Palabras clave

Nonlinear control, renewable energy systems, PEMFC, adaptive control, power electronics

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