Modelling and mathematical fitting of efficiency functions for FC hybrid topologies
Keywords:
FC Systems, curve fitting, energy managementAbstract
In this work, a mathematical model of efficiencies for hybrid Fuel Cell (FC) systems is presented, considering the series (SH), parallel (PH), and serial-parallel (SPH) topologies. In these systems, were implemented modular non-inverting Buck-Boost converters. Their efficiency functions depend on their operating points, particularly their output currents and operation modes (Buck, Boost, and Buck-Boost). In addition, the DC Bus efficiency has been modeled and used in each system, corresponding to a function of the load duty cycle with a frequency of 100 Hz. This DC Bus’s peak power and nominal voltage correspond to 1.5 kW and 48 V, respectively. These hybrid systems were implemented in SIMULINK / MATLAB®, considering the capacitors’ initial voltage or pre-charge conditions to reduce the computation time. The analytical and experimental results are validated using the Nash-Sutcliffe Coefficient of Efficiency (NSE).
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Copyright (c) 2023 Harrynson Ramírez Murillo, Martha P. Camargo Martínez, Fabián Salazar Cáceres, Carlos A. Torres Pinzón
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