An LPV Control Approach for a Fuel Cell Power Generator Air Supply System

David Hernández-Torres (1, 2) , Olivier Sename (1) , Delphine Riu (2)

1 GIPSA-SLR - GIPSA - Systèmes linéaires et robustesse
2 G2ELab - Laboratoire de Génie Electrique de Grenoble

In this paper, the control of the air supply system of a fuel cell power generator is addressed. The management of the air dynamic entering the fuel cell is assured by the control of the air flow of a compressor. The air supply subsystem is controlled to keep a desired oxygen excess ratio, this allows to improve the fuel cell performance. Linear Matrix Inequalities (LMI) tools are extensively used in this paper as a solution to the multivariable robust control problem. Robust multivariable H1 controllers are considered. A special interest is also given to reduced order controllers, specifically simple PI structures with desired Hinf performances. The models used for control implementation were identified from measures on a real test-bench set-up. Two control strategies are proposed, first a speed controller for the air compressor is designed; then the problem of a robust control of the system subject to some model uncertainties is solved using the Linear Parameter Varying (LPV) approach. The validation of the closed-loop control strategies is achieved using time-domain simulation analysis and the gain scheduled approach.

Domaines: Automatique / Robotique

David Hernández-Torres, Olivier Sename, Delphine Riu. An LPV Control Approach for a Fuel Cell Power Generator Air Supply System. ACC 2012 - American Control Conference, Jun 2012, Montréal, Canada. pp.n/a. ⟨hal-00682133⟩