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This paper presents different works which are actually developed in the field of fuel-cell hybrid systems in different public laboratories in France. These works are presented in three sections corresponding to: 1. hybrid fuel cell/battery or supercapacitor power sources; 2. fuel-cell multi-stack power sources; 3. fuel cell in hybrid power systems for distributed generation. The presented works combine...
A classical wind energy conversion system is usually a passive generator. Its power does not depend on the grid requirement, but entirely on the fluctuant wind condition. In this paper a DC-coupled wind/hydrogen/super-capacitor hybrid power system is studied. The purpose of the control system is to coordinate these different sources, especially their power exchange, in order to make the generated...
This paper presents the real-time emulation of a hydrogen-production process for assessment of an active wind- energy conversion system. The hardware-in-the-loop emulator of the electrolyzer consists of a power-electronic stage and a control stage. In the control board, the algorithmic equations of the electrolyzer modeling and its control should be implemented, as well as the emulator's power converter...
A hybrid power system with a PV energy conversion system is proposed with lead-acid batteries based long-term storage units and ultracapacitors based fast-dynamic storage units in a DC-coupled structure. It is necessary and important to manage the powers among those different power sources. A power management algorithm is proposed for this hybrid power system by taking into account the characteristics...
In this paper a graphical modelling tool is proposed to develop a fuzzy logic based supervisor. This tool facilitates the analysis and the determination of fuzzy control algorithms adapted to complex hybrid systems. To explain this methodology, the association of wind generators, dispersed generator and storage systems are considered. The performance of this supervisor is shown with the help of simulations...
A hybrid power system is proposed and is based on wind energy conversion system with hydrogen based long-term storage unit and super-capacitor based fast-dynamic storage unit. A power management algorithm is organized in different time scales for its normal operating mode. Four studied cases show that, the long-term storage can compensate or absorb the difference between the generated fluctuating...
The goal of this work is to develop a supervision strategy for hybrid generation systems. This strategy must allow to improve the grid insertion of wind turbine generators (WTG) by associating them some storage systems and foreseeable decentralized generator (FDG). To maintain a reference power and to contribute to the primary frequency control with a hybrid generator based on variable speed WTG,...
This paper gives a control oriented modeling of an electrolyzer, as well as the ancillary system for the hydrogen production process, by using causal ordering graph. The control system has also been proposed to manage the power flow and hydrogen flow. The simulation results have highlighted the variation domains and dynamics of physical quantities.
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