Dual loop controllers using PI, sliding mode and flatness controls applied to low voltage converters for fuel cell applications

作者：Saadi R; Kraa O; Ayad M Y^*; Becherif M; Ghodbane H; Bahri M; Aboubou A

来源：International Journal of Hydrogen Energy, 2016, 41(42): 19154-19163.

DOI：10.1016/j.ijhydene.2016.08.171

• DC/DC converter
• Fuel cell
• Interleaved boost converter
• Interleaved double dual boost
• Sliding control
• Flatness control

This paper treats the design, control and implementation of a non-isolated low voltage DC/DC converter with a high voltage ratio coupled a fuel cell stack and a DC bus which can be used in transport applications. The proposed converter consists of two cascade stages non isolated DC/DC converters. The first stage is an interleaved boost converter and the second is a double dual-interleaving boost converter. The selection of each stage is based on the efficiency of the converter with a high output voltage, a small input current ripple, and an output voltage ripple. The control of the converters is ensured by a dual loop control that contains for the first step a voltage loop with a linear PI controller and a fast current loop using a non-linear sliding controller for both converters. After that, the voltage loop of the first stage is replaced by an energy loop based on a differential flatness control approach. The simulation of the proposed control is performed under Matlab-Simulink environment and validated by experimental results using small-scale test bench with dSPACE-1104 card. This paper presents and comments the introduced device and discusses the obtained results.

• 出版日期2016-11-2