Abstract
In this paper, linear proportional–integral (PI) and nonlinear flatness-based controllers for dc link stabilization for fuel cell/supercapacitor hybrid power plants are compared. For high power applications, 4-phase parallel boost converters are implemented with a switching interleaving technique for a fuel cell (FC) converter, and 4-phase parallel bidirectional converters are implemented with a switching interleaving technique for a supercapacitor converter in the laboratory. As controls, mathematical models (reduced-order models) of the FC converter and the supercapacitor converter are given. The prototype small-scale power plant studied is composed of a PEMFC system (the Nexa Ballard FC power generator: 1.2 kW, 46 A) and a supercapacitor module (100 F, 32 V, based on Maxwell Technologies Company). Simulation (by Matlab/Simulink) and experimental results demonstrate that the nonlinear differential flatness-based control provides improved dc bus stabilization relative to a classical linear PI control method.
Original language | English |
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Pages (from-to) | 454-464 |
Number of pages | 11 |
Journal | International Journal of Electrical Power and Energy Systems |
Volume | 54 |
DOIs | |
Publication status | Published - 1 Jan 2014 |
Keywords
- Converters
- Fuel cells
- Nonlinear control
- Supercapacitor
- Voltage control
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering