Optimisation de l'architecture et des flux énergétiques de centrales à énergies renouvelables offshore et onshore équipées de liaisons en continu

Abstract : In EU, the electricity production objective by using renewable energy in 2020 is 20 %. Mostly offshore wind as well as tidal current and photovoltaic will contribute to achieve this objective. Considering the fact that offshore wind farms are more and more far away from the onshore grid, farm power production is higher and higher and recent improvements in power electronics lead to revise the electrical architecture. Several offshore wind farms electrical topologies are compared in order to define the more suitable in term of feasibility, efficiency and availability. A solution with DC grid is chosen given that it presents lower losses and DC-DC converters using high-frequency transformers reducing footprint, compared to classical AC solutions. Selected DC topology is modeled with particular attention to technological core of the wind farm: the Full-Bridge DC-DC converter. An interlacing control for DC-DC converter is explained in order to decrease the size of the filter. Two experiences at real (2 MW) and small scale (4 kW) allow to validate the models, the losses and controls integrated in the converter. Protections which can be used for DC grid are also studied with DC static breaker design proposal. Interactions between the real time simulator and 4 kW mock-up is realized to compare converters behavior from wind farm on large time scales. Different controls are tested and more particularly ones allowing to validate the wind farm capacity to remain connected to the grid during the AC faults. All strategies developed on wind offshore farms are extended to high power solar farms to highlight analogies between both renewable energies.
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https://pastel.archives-ouvertes.fr/pastel-00749737
Contributor : Pascal Monjean <>
Submitted on : Thursday, November 8, 2012 - 11:45:28 AM
Last modification on : Wednesday, October 17, 2018 - 2:52:05 PM
Long-term archiving on : Saturday, February 9, 2013 - 3:43:17 AM

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  • HAL Id : pastel-00749737, version 1

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Pascal Monjean. Optimisation de l'architecture et des flux énergétiques de centrales à énergies renouvelables offshore et onshore équipées de liaisons en continu. Energie électrique. Arts et Métiers ParisTech, 2012. Français. ⟨NNT : 2012ENAM0027⟩. ⟨pastel-00749737⟩

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