Kodjo Agbossou

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In the algorithms found in the literature for finding the optimum point of operation MPPT ( maximum power point tracking), of photovoltaic (PV) modules, the initial reference value is fixed arbitrarily and without constraints. This reduces the performance of research into the optimal operation point of PV systems. In order to improve this performance, a(More)
This paper presents afuzzy logic controller for maximum power point tracking (MPPT) in photovoltaic system. An easy and accurate method of modeling photovoltaic arrays is proposed. The model and fuzzy based control strategies are combined to form intelligent controllers that are more accurate and robust. The model based controller is designed such that the(More)
Electrolytic hydrogen offers a promising alternative for long-term energy storage of renewable energy (RE). A stand-alone RE system based on energy storage in the form of hydrogen has been developed at the Hydrogen Research Institute and successfully tested for automatic operation with an in-house designed control system and power conditioning devices. In(More)
At present, islanding detection is one of the important research orientations in the area of distributed generation (DG). There exist currently in the literature several methods for islanding detection in the case of single distributed generator connected to a utility grid. These methods are classified as active, passive and methods installed on the(More)
The Hydrogen Research Institute developed a hybrid renewable energy power system that uses a wind turbine, a photovoltaic array and a fuel cell. In order to connect this system to the grid, an islanding protection device is being developed. This paper presents the passive (U/O Voltage, U/O Frequency) and active (Sandia frequency shift and Sandia voltage(More)
We propose an adaptive optimal power splitting EMS for PEMFC/battery hybrid system. An online optimization problem based on the Pontryagins Minimum Principle was developed to minimize the hydrogen consumption. An extremum adaptive-seeking control layer was proposed to take into account the PEM-FC performances drift. The proposed optimal adaptive EMS is(More)
This paper is dealing with the interface design and software development for proton exchange membrane (PEM) fuel cell modeling based on Matlab/Simulink environment. Three models used in the software, steady-state mode, dynamic model and thermodynamic model, are described first. These models are then implemented through the graphic user interface (GUI)(More)
A stand-alone renewable wind-photovoltaic energy system can be used to meet the energy requirements of off-grid remote area applications. Such a system has been developed and successfully tested at the Hydrogen Research Institute (HRI). In the HRFs system the excess electrical energy with respect to load demand, is transformed and stored as hydrogen gas via(More)