An offshore wind farm (1) comprising a number of wind turbine generator arrays (5). Each wind turbine generator array (5) comprises an array transformer (6) and a number of wind turbine generators (6) connected, in use, electrically to the array transformer (8). The array transformer (8) is associated with one wind turbine generator (6) among said number of wind turbine generators (6) and each array transformer (8) is, in use, electrically connected a bus bar (17) on the offshore substation (4). The bus bar (17) on the offshore substation is, in use, connected electrically to an export cable (3).
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