WIND TURBINE HAVING A REDUCED RADAR CROSS SECTION

摘要

A wind turbine including a support structure and one or more turbine blades is presented, that incorporates ways for reducing the radar cross section (RCS), wherein the support structure is notionally divided into an upper section in the shadow of the blade sweep area, and a lower section beneath the upper section, wherein the upper section is adapted to have the ways for reducing the RCS, and the lower section does not have the adaptation. The invention makes use of the realisation that the blade masking the tower as it rotates (or the blade being masked by the tower if facing away from a radar), contributes significantly to interference to radar systems, and so localised application of e.g. RAM can give good RCS reduction at a lower cost than treating the whole structure.

主权项

1. A wind turbine comprising at least a support structure and one or more turbine blades, wherein the support structure is notionally divided into an upper section and a lower section, the upper section comprising approximately that part of the support structure having overlap with the turbine blades' sweep area, and a lower portion being the remaining part of the support structure below it, characterised in that a substantial part of the upper section is adapted to have a reduced radar cross section (RCS), and wherein the lower section does not have a substantial part so adapted.