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- Title
Realistic modeling of direct lightning strike on a wind farm: grounding systems considerations.
- Authors
Maallem, Wahiba; Nekhoul, Bachir; Kaouche, Senaa
- Abstract
In a wind farm, the grounding circuit is a complex electrical system made up of several interconnected groundings. Its role is very important for the protection of the electrical equipment during a direct lightning strike. To contribute to the optimization of the conception of this complex grounding system in his real configuration (wind turbine towers, grounding grids, and several hundred meters of buried conductor wires ...), we propose in this paper a realistic modeling. Realistic because, to model in all rigors using an electromagnetic field formalism a problem of propagation of electromagnetic transients in electrical device of large geometrical dimensions where the main environment (soil) is not homogeneous does not bring an appreciable advantage and consumes a very high calculation time. Also, the ideal for the engineer is to have a model that is easy to understand, accessible in its theory and obviously preserving the accuracy of the results and with very low computation time. In this work, to study the lightning surges in a wind farm, mainly to know the Ground Potential Rise and the distribution of the currents in the conductors, we use a modeling based on the transmission line equations. Our modeling is carried out by considering the effect of the frequency on the electrical characteristics (resistivity and dielectric permittivity) of the soil; the results we obtain are without loss of precision and with a very short calculation time.
- Subjects
LIGHTNING; ELECTRIC transients; ENGINEERS; WIND power plants; ELECTROMAGNETIC fields; ELECTRIC lines; OFFSHORE wind power plants
- Publication
Electrical Engineering, 2024, Vol 106, Issue 3, p3269
- ISSN
0948-7921
- Publication type
Article
- DOI
10.1007/s00202-023-02149-y