Izvorni znanstveni članak
https://doi.org/10.7305/automatika.54-2.165
State Variables Estimation of Fuel Cell – Boost Converter System Using Fast Output Sampling Method
Toni Bjažić
; Department of Control and Computer Engineering, Faculty of Electrical Engineering and Computing, University of Zagreb, Unska 3, HR-10000, Zagreb, Croatia
Željko Ban
; Department of Control and Computer Engineering, Faculty of Electrical Engineering and Computing, University of Zagreb, Unska 3, HR-10000, Zagreb, Croatia
Nedjeljko Perić
orcid.org/0009-0006-6466-2937
; Department of Control and Computer Engineering, Faculty of Electrical Engineering and Computing, University of Zagreb, Unska 3, HR-10000, Zagreb, Croatia
Sažetak
Estimation of state variables of a peak current mode (PCM) controlled DC-DC boost converter supplied by a PEM fuel cell is described in this paper. Since this system is highly nonlinear and non-minimum phase, its state variables are estimated by using fast output sampling method. Estimated state variables are the converter output voltage and its first derivative, and they are suitable for model reference adaptive control or sliding mode based control techniques. The estimator has been designed in a way that it gives a good estimate of the state variables in the continuous and in the discontinuous conduction mode of the converter, and in the presence of measurement and process noise caused by converter switching-mode operation. Experimental results of estimating the state variables on a 450 W boost converter supplied by the emulator of the PEM fuel cell BCS 64-32 show good results of the estimation, regardless of the conduction mode of the converter, i.e. the operating point determined by its output current.
Ključne riječi
state-space variables; estimation; fast output sampling; peak current mode control; boost converter; step-up converter; PEM fuel cell
Hrčak ID:
103406
URI
Datum izdavanja:
2.5.2013.
Posjeta: 1.638 *