Lightning protection

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Modelling of transient electrical phenomena on power networks.

EDF R&D is the EDF centre of expertise on protecting systems against lightning. The main research programmes at present relate to the points outlined below.

New methods for power generation (wind and photovoltaics)

These installations, due to their height or the vulnerability to lightning of the technology used, are risky, sometimes for different reasons to those of traditional means (nuclear, coal-fired, hydro). Since 2007, a research initiative has been in place in collaboration with EDF Energies Nouvelles on protection of wind farms. The objectives are preliminary assessment of the lightning risk upstream of the projects, development of expertise, evaluation and selection capabilities for solutions put forward by manufacturers and participation in the creation of feedback.

Lightning risk analysis

Since 1995, EDF R&D has been a recognised player in the assessment of lightning risk for industrial installations. R&D is QUALIFOUDRE certified (a label from the French National Institute for Industrial Environment and Risks) for studies of complex sites. It has developed its own IT tools appropriate for large industrial sites and has carried out the lightning risk assessment for all French nuclear power plants. EDF R&D is developing its tools in line with changes in applicable standards and regulations and is extending its methods to new installations (Flamanville EPR unit).

Power network and earthing system lightning behaviour modelling

Since 2006, EDF R&D has worked on the high frequency behaviour of installations, more specifically on lightning. These studies are used to design equipment according to lightning constraints.

Modelling of transient electrical phenomena on power networks

EDF R&D contributes, with a network of partners, to the development of digital simulation tools to anticipate transient electrical phenomena on the network. These phenomena may be linked to lightning, as well as to operation of electrical equipment on the network and even sudden malfunction of such equipment. These simulation tools are now internationally used and recognised.

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the future challenge

EDF R&D has built a scenario that allows to shift out the direct fossil energy use in buildings, without increasing dramatically the electricity uses. This scenario is based on the dissemination of existing best technologies, as efficient thermal insulation, heat pumps and biomass for space heating, and solar. It has been published in the french foresight monthly journal "Futuribles" under the title "Buildings without any fossil energy in France in 2050" ? (July - August 2008).

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